<?php
/**
 * The model file of zai module of ZenTaoPMS.
 *
 * @copyright   Copyright 2009-2025 禅道软件（青岛）有限公司(ZenTao Software (Qingdao) Co., Ltd. www.cnezsoft.com)
 * @license     ZPL(http://zpl.pub/page/zplv12.html) or AGPL(https://www.gnu.org/licenses/agpl-3.0.en.html)
 * @author      tenghuaian <tenghuaian@chandao.com>
 * @package     zai
 * @link        https://www.zentao.net
 */
class zaiModel extends model
{
    /**
     * 获取当前用户ZAI Authorization Token。
     * Get ZAI Authorization Token of current user.
     *
     * @access public
     * @param object|null $zaiConfig
     * @param bool $admin
     * @return array
     */
    public function getToken($zaiConfig = null, $admin = false)
    {
        $zaiConfig = $zaiConfig ? $zaiConfig : $this->getSetting($admin);
        if(!isset($zaiConfig->token) || !isset($zaiConfig->appID) || ($admin && !isset($zaiConfig->adminToken)))
        {
            return array(
                'result'  => 'fail',
                'message' => $this->lang->zai->configurationUnavailable
            );
        }

        if(!$this->loadModel('user')->isLogon())
        {
            return array(
                'result' => 'fail',
                'message' => $this->lang->zai->illegalZentaoUser
            );
        }

        $token       = $admin ? $zaiConfig->adminToken : $zaiConfig->token;
        $userID      = $this->app->user->account;
        $zaiTokenTTL = isset($zaiConfig->zaiTokenTTL) ? $zaiConfig->zaiTokenTTL : 1200;
        $expiredTime = time() + $zaiTokenTTL;
        $origin      = $token . $zaiConfig->appID . $userID . $expiredTime;
        $hash        = md5($origin);

        return array(
            'result' => 'success',
            'data'   => array(
                'hash'        => $hash,
                'expiredTime' => $expiredTime,
                'appID'       => $zaiConfig->appID,
                'userID'      => $userID
            )
        );
    }

    /**
     * 格式化旧的ZAI设置。
     * Format old ZAI settings.
     *
     * @access public
     * @param object|null $setting
     * @return object|null
     */
    public function formatOldSetting($setting)
    {
        if(empty($setting)) return null;
        if(empty($setting->host) && !empty($setting->apiBaseUrl))
        {
            $apiBaseUrl = str_replace('///', '', $setting->apiBaseUrl);
            $apiBaseUrl = str_replace('http://', '', $apiBaseUrl);
            $apiBaseUrl = str_replace('https://', '', $apiBaseUrl);
            $apiBaseUrl = str_replace('/v1', '', $apiBaseUrl);
            $urlParts = explode(':', $apiBaseUrl);
            $setting->host = $urlParts[0];
            $setting->port = isset($urlParts[1]) ? $urlParts[1] : 0;
        }
        if(empty($setting->token) && !empty($setting->appToken))
        {
            $setting->token = $setting->appToken;
            unset($setting->appToken);
        }
        return $setting;
    }

    /**
     * 获取ZAI设置。
     * Get ZAI settings.
     *
     * @access public
     * @param bool $includeAdmin
     * @return object|null
     */
    public function getSetting($includeAdmin = false)
    {
        $settingJson =  $this->loadModel('setting')->getItem("owner=system&module=zai&section=global&key=setting");
        $setting = json_decode($settingJson);
        if(!is_object($setting) && isset($this->config->zai))
        {
            $setting = $this->formatOldSetting($this->config->zai);
        }

        if(empty($setting) || empty($setting->host) || empty($setting->appID) || empty($setting->token))
        {
            return null;
        }

        $vectorizedInfo = $this->getVectorizedInfo();
        if(!empty($vectorizedInfo->key))
        {
            $setting->globalMemory = 'zentao:global';
        }

        if(!$includeAdmin) unset($setting->adminToken);

        return $setting;
    }

    /**
     * 设置ZAI设置。
     * Set ZAI settings.
     *
     * @access public
     * @param object|null $setting
     */
    public function setSetting($setting)
    {
        if(!is_object($setting))
        {
            $this->loadModel('setting')->setItem('system.zai.global.setting', '');
            return;
        }
        $this->loadModel('setting')->setItem('system.zai.global.setting', empty($setting) ? '' : json_encode($setting));
    }

    /**
     * 获取禅道数据向量化信息。
     * Get information of vectorized data of ZenTao.
     *
     * @access public
     * @return object
     */
    public function getVectorizedInfo()
    {
        $infoJson = $this->loadModel('setting')->getItem("owner=system&module=zai&section=kb&key=systemVectorization");
        $info     = json_decode($infoJson);
        if(!$info)
        {
            $info = new stdClass();
            $info->key             = '';
            $info->status          = 'disabled';
            $info->syncedTime      = 0;
            $info->syncedCount     = 0;
            $info->syncFailedCount = 0;
            $info->syncTime        = 0;
            $info->syncingType     = zaiModel::getNextSyncType();
            $info->syncingID       = 0;
            $info->syncDetails     = new stdClass();
            $info->createdAt       = time();
            $info->createdBy       = $this->app->user->account;
        }
        return $info;
    }

    /**
     * 设置禅道数据向量化信息。
     * Set information of vectorized data of ZenTao.
     *
     * @access public
     * @param object $info  - The information of vectorized data. 禅道数据向量化信息对象。
     */
    public function setVectorizedInfo($info)
    {
        if(!is_string($info)) $info = json_encode($info);
        $this->loadModel('setting')->setItem('system.zai.kb.systemVectorization', $info);
    }

    /**
     * 调用 ZAI API。
     * Call ZAI API.
     *
     * @access public
     * @param string $path
     * @param string $method
     * @param array|null $params
     * @param array|null $postData
     * @param bool $admin
     * @return array 通过 result 属性返回调用结果，通过 data 属性返回调用数据，通过 message 属性返回调用错误信息，通过 code 属性返回调用错误代码。 Return array with result, data, message and code.
     */
    public function callAPI($path, $method = 'POST', $params = null, $postData = null, $admin = false)
    {
        $setting = $this->getSetting($admin);
        if(empty($setting)) return array('result' => 'fail', 'message' => $this->lang->zai->configurationUnavailable);

        $tokenInfo = $this->getToken($setting, $admin);
        if($tokenInfo['result'] != 'success') return $tokenInfo;

        $tokenData = array('hash' => $tokenInfo['data']['hash'], 'expired_time' => $tokenInfo['data']['expiredTime'], 'app_id' => $tokenInfo['data']['appID'], 'user_id' => $tokenInfo['data']['userID']);
        $token = ($admin ? 'ak-' : 'ek-') . base64_encode(json_encode($tokenData));

        /* Check if the request is HTTPS. */
        if($path[0] != '/') $path = '/' . $path;
        $isHttps = !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on';
        if(!$isHttps) $isHttps = !empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https';
        if(!$isHttps) $isHttps = !empty($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == 443;

        $protocol = $isHttps ? 'https://' : 'http://';
        $host     = $setting->host;
        $port     = $setting->port;
        $url      = $protocol . $host . ($port ? ":$port" : '') . $path;
        if($params) $url = $url . '?' . http_build_query($params);

        $curl = curl_init($url);

        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_HEADER, true);

        if($method === 'GET')
        {
            curl_setopt($curl, CURLOPT_HTTPGET, true);
        }
        elseif($method === 'POST')
        {
            curl_setopt($curl, CURLOPT_POST, true);
        }
        else
        {
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $method);
        }

        $hasFile = false;
        if($postData !== null) // Post data must set even if it is empty
        {
            foreach($postData as $value)
            {
                if($value instanceof CURLFile)
                {
                    $hasFile = true;
                    break;
                }
            }
            curl_setopt($curl, CURLOPT_POSTFIELDS, $hasFile ? $postData : json_encode($postData, JSON_UNESCAPED_UNICODE));
        }

        $headers = ['Authorization: Bearer ' . $token];
        if(!$hasFile) $headers[] = 'Content-Type: application/json';
        curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);

        $response = curl_exec($curl);
        $error    = '';
        $data     = null;
        $info     = curl_getinfo($curl);
        $code     = isset($info['http_code']) ? $info['http_code'] : curl_getinfo($curl, CURLINFO_HTTP_CODE);

        if(curl_errno($curl))
        {
            $error = curl_error($curl);
        }
        else
        {
            $headerSize = isset($info['header_size']) ? $info['header_size'] : curl_getinfo($curl, CURLINFO_HEADER_SIZE);
            $data       = substr($response, $headerSize);
        }

        curl_close($curl);

        if($code == 404) return array('result' => 'fail', 'data' => null, 'message' => $this->lang->notFound, 'code' => $code);
        if($code == 401) return array('result' => 'fail', 'data' => null, 'message' => $this->lang->zai->authenticationFailed, 'code' => $code);

        if($error || $code != 200)
        {
            return array('result' => 'fail', 'data' => $data, 'code' => $code, 'postData' => $postData, 'message' => sprintf($this->lang->zai->callZaiAPIFailed, $url, ($this->app->config->debug ? $error : '') . "(code: $code, response: $response)"));
        }

        if(empty($data))     $data = $response;
        if(is_string($data)) $data = json_decode($data, true);
        return array('result' => 'success', 'data' => $data);
    }

    /**
     * 调用ZAI管理API。
     * Call ZAI admin API.
     *
     * @access public
     * @param string $path
     * @param string $method
     * @param array|null $params
     * @param array|null $postData
     * @return array 通过 result 属性返回调用结果，通过 data 属性返回调用数据，通过 message 属性返回调用错误信息，通过 code 属性返回调用错误代码。 Return array with result, data, message and code.
     */
    public function callAdminAPI($path, $method = 'POST', $params = null, $postData = null)
    {
        return $this->callAPI($path, $method, $params, $postData, true);
    }

    /**
     * 启用数据向量化。
     * Enable data vectorization.
     *
     * @access public
     * @return array
     */
    public function enableVectorization($force = false)
    {
        $info = $this->getVectorizedInfo();
        if($info->status != 'disabled' && !$force) return array('result' => 'fail', 'message' => $this->lang->zai->vectorizedAlreadyEnabled, 'info' => $info);

        $suffix = '_' . time();
        $postData = array('name' => 'zentao' . $suffix, 'description' => $this->app->lang->zai->zentaoVectorization);

        $result = $this->callAdminAPI('/v8/memories', 'POST', null, $postData);

        if($result['result'] != 'success') return $result;

        if(empty($result['data']['id'])) return array('result' => 'fail', 'message' => $this->lang->zai->vectorizedFailed);

        $info->status          = 'wait';
        $info->key             = $result['data']['id'];
        $info->syncedTime      = 0;
        $info->syncedCount     = 0;
        $info->syncFailedCount = 0;
        $info->syncTime        = 0;
        $info->syncingType     = zaiModel::getNextSyncType();
        $info->syncingID       = 0;
        $info->syncDetails     = new stdClass();
        $this->setVectorizedInfo($info);

        return array('result' => 'success', 'info' => $info, 'data' => $result['data'], 'message' => $this->lang->zai->vectorizedEnabled);
    }

    /**
     * 获取下一个指定类型的对象。
     * 从数据库查询对应 $syncingType 的下一个待同步的对象，即 ID 大于 $syncingID 的且没有被删除的下一个对象。如果未查询到，则返回 null。
     *
     * @access public
     * @param string $type
     * @param int $id
     * @return object|null
     */
    public function getNextTarget($type, $id)
    {
        if(!isset(static::$syncTables[$type])) return null;

        $table = static::$syncTables[$type];
        $target = $this->dao->select('*')->from($table)->where('id')->ge($id)->andWhere('deleted')->eq(0)->orderby('id_asc')->fetch();
        if(!$target) return null;

        return $target;
    }

    /**
     * 同步下一个目标。
     * Sync next target.
     *
     * @access public
     * @param string $memoryID 知识库 ID。The ID of knowledge base.
     * @param string $type
     * @param int $id
     * @return array|null
     */
    public function syncNextTarget($memoryID, $type, $id)
    {
        $target = $this->getNextTarget($type, $id);
        if(!$target) return null;

        $markdownData = static::convertTargetToMarkdown($type, $target);
        $syncData     = array();

        $syncData['content']      = $markdownData['content'];
        $syncData['content_type'] = 'markdown';
        $syncData['key']          = "$type-$target->id";
        $syncData['attrs']        = array('objectType' => $type, 'objectID' => $target->id);

        if(isset($markdownData['attrs'])) $syncData['attrs'] = array_merge($syncData['attrs'], $markdownData['attrs']);

        $result = $this->callAdminAPI("/v8/memories/$memoryID/contents", 'POST', null, $syncData);
        if($result['result'] != 'success')
        {
            $code = isset($result['code']) ? $result['code'] : 0;

            /* 当指定 memoryID 的知识库不存在时创建一个新的。 */
            /* If kb with the given memoryID not exists, then create a new  one. */
            if($code == 412)
            {
                $result['message'] = $this->lang->zai->cannotFindMemoryInZai;
                $result['code']    = 'cannotFindMemoryInZai';
            }

            if($code !== 100 && ($code >= 400 || $code <= 500)) $result['fatal'] = true;
            return $result;
        }

        return array('result' => 'success', 'target' => $target, 'id' => $target->id, 'data' => $result['data'], 'syncedData' => $syncData);
    }

    /**
     * 获取知识库在 ZAI 的 key。
     * Get key of knowledge base in ZAI.
     *
     * @access public
     * @param string|int $libID
     * @return string
     */
    public function getCollectionKey($libID)
    {
        if($libID === 'global')
        {
            $vectorizedInfo = $this->getVectorizedInfo();
            return empty($vectorizedInfo->key) ? '' : $vectorizedInfo->key;
        }

        return '';
    }

    /**
     * 创建知识库。
     * Create knowledge library.
     *
     * @access public
     * @param string $name
     * @param string $description
     * @param array|null $options
     * @return array 通过 result 属性返回调用结果，通过 data 属性返回调用数据，通过 message 属性返回调用错误信息，通过 code 属性返回调用错误代码。 Return array with result, data, message and code.
     */
    public function createKnowledgeLib($name, $description = '', $options = null)
    {
        $postData = ['name' => $name, 'description' => $description];
        if($options) $postData = array_merge($postData, $options);

        $result = $this->callAdminAPI('/v8/memories', 'POST', null, $postData);
        if($result['result'] !== 'success' || empty($result['data']['id'])) return null;

        return $result['data'];
    }

    /**
     * 删除知识库。
     * Delete knowledge library.
     *
     * @access public
     * @param string $memoryID
     * @return bool
     */
    public function deleteKnowledgeLib($memoryID)
    {
        $result = $this->callAdminAPI("/v8/memories/$memoryID", 'DELETE');
        return $result['result'] === 'success';
    }

    /**
     * 更新知识内容。
     * Update knowledge content.
     *
     * @access public
     * @param string $memoryID
     * @param string $key
     * @param string $content
     * @param string $contentType
     * @param array|null $attrs
     * @return array|null
     */
    public function updateKnowledgeItem($memoryID, $key, $content, $contentType = 'markdown', $attrs = null)
    {
        $postData = ['content' => $content, 'content_type' => $contentType, 'key' => $key, 'attrs' => $attrs];

        $result = $this->callAdminAPI("/v8/memories/$memoryID/contents", 'POST', null, $postData);

        if($result['result'] === 'success')
        {
            if(!empty($result['data']['content_id'])) return $result['data']['content_id'];

            $contentsResult = $this->callAdminAPI("/v8/memories/$memoryID/contents", 'GET');
            if($contentsResult['result'] !== 'success') return null;

            $contentList = empty($contentsResult['data']) ? array() : $contentsResult['data'];
            foreach($contentList as $content)
            {
                if($content['key'] === $key) return $content['id'];
            }
        }

        return null;
    }

    /**
     * 删除知识内容。
     * Delete knowledge content.
     *
     * @access public
     * @param string $memoryID
     * @param string $contentID
     * @return bool
     */
    public function deleteKnowledgeItem($memoryID, $contentID)
    {
        $result = $this->callAdminAPI("/v8/memories/$memoryID/contents/$contentID", 'DELETE');
        return $result['result'] === 'success';
    }

    /**
     * 获取知识内容块列表。
     * Get list of knowledge content chunks.
     *
     * @access public
     * @param string $memoryID
     * @param string $contentID
     * @return array|null
     */
    public function getKnowledgeChunks($memoryID, $contentID)
    {
        $result = $this->callAdminAPI("/v8/memories/$memoryID/contents/$contentID/chunks", 'GET');

        if($result['result'] !== 'success') return null;

        return empty($result['data']) ? array() : $result['data'];
    }

    /**
     * 搜索知识库。
     * Search knowledge base.
     *
     * @access public
     * @param string $query
     * @param string $collection
     * @param array  $filter
     * @param int    $limit
     * @param float  $minSimilarity
     * @param bool   $filterByPriv
     * @return array
     */
    public function searchKnowledges($query, $collection, $filter, $limit = 20, $minSimilarity = 0.5, $filterByPriv = true)
    {
        $postData = array();
        $postData['query']          = $query;
        $postData['limit']          = $limit;
        $postData['min_similarity'] = $minSimilarity;
        $postData['content_filter'] = $filter;

        $result = $this->callAdminAPI('/v8/memories/' . $collection . '/embeddings-search-contents', 'POST', null, $postData);

        if($result['result'] != 'success') return array();

        $knowledges = empty($result['data']) ? array() : $result['data'];
        if($filterByPriv) $knowledges = $this->filterKnowledgesByPriv($knowledges, 'content');
        return $knowledges;
    }

    /**
     * 搜索知识块。
     * Search knowledge chunks.
     *
     * @access public
     * @param string $query
     * @param string $collection
     * @param array  $filter
     * @param int    $limit
     * @param float  $minSimilarity
     * @param bool   $filterByPriv
     * @return array
     */
    public function searchKnowledgeChunks($query, $collection, $filter = array(), $limit = 20, $minSimilarity = 0.5, $filterByPriv = true)
    {
        $postData = array();
        $postData['query']          = $query;
        $postData['limit']          = $limit;
        $postData['min_similarity'] = $minSimilarity;
        $postData['content_filter'] = $filter;

        $result = $this->callAdminAPI('/v8/memories/' . $collection . '/embeddings-search-chunks', 'POST', null, $postData);

        if($result['result'] != 'success') return array();
        $chunks = empty($result['data']) ? array() : $result['data'];
        if($filterByPriv) $chunks = $this->filterKnowledgesByPriv($chunks, 'chunk');
        return $chunks;
    }

    /**
     * 在多个知识库中搜索知识。
     * Search knowledges in multiple collections.
     *
     * @access public
     * @param string $query
     * @param string $type
     * @param array  $filters
     * @param int    $limit
     * @param float  $minSimilarity
     * @return array
     */
    public function searchKnowledgesInCollections($query, $filters, $type = 'content', $limit = 20, $minSimilarity = 0.5)
    {
        $knowledges = array();
        foreach($filters as $collection => $setting)
        {
            $key = $this->getCollectionKey($collection);
            if(empty($key)) continue;

            /* 不进行权限过滤，按匹配度排序后会统一过滤，减少循环次数。 */
            $searchKnowledges = $type === 'chunk' ? $this->searchKnowledgeChunks($query, $key, $setting, $limit + 10, $minSimilarity, false) : $this->searchKnowledges($query, $key, $setting, $limit + 10, $minSimilarity, false); // 比预设的数目多搜索 10 个，避免因过滤导致无法匹配到。
            if($searchKnowledges) $knowledges = array_merge($knowledges, $searchKnowledges);
        }

        array_multisort(array_column($knowledges, 'similarity'), SORT_DESC, $knowledges);
        return $this->filterKnowledgesByPriv($knowledges, $type, $limit);
    }

    /**
     * 判断用户是否可以查看对象。
     * Check if user can view object.
     *
     * @access public
     * @param string $objectType
     * @param int    $objectID
     * @return bool
     * @param mixed[]|null $attrs
     */
    public function canViewObject($objectType, $objectID, $attrs = null)
    {
        if($this->app->user->admin) return true;

        if(isset(static::$objectViews[$objectType][$objectID])) return static::$objectViews[$objectType][$objectID];

        if(!isset(static::$objectViews[$objectType])) static::$objectViews[$objectType] = array();

        if($attrs === null) $attrs = array();
        $canView = false;
        if($objectType === 'story' || $objectType === 'demand')
        {
            $table   = $objectType === 'story' ? TABLE_STORY : TABLE_DEMAND;
            $product = isset($attrs['product']) ? $attrs['product'] : 0;
            if(!$product) $product = $this->dao->select('product')->from($table)->where('id')->eq($objectID)->fetch('product');
            $canView = strpos(',' . $this->app->user->view->products . ',', ",$product,") !== false;
        }
        elseif($objectType === 'bug')
        {
            $product = isset($attrs['product']) ? $attrs['product'] : 0;
            if(!$product) $product = $this->dao->select('product')->from(TABLE_BUG)->where('id')->eq($objectID)->fetch('product');
            $canView = strpos(',' . $this->app->user->view->products . ',', ",$product,") !== false;
            if(!$canView)
            {
                $project = isset($attrs['project']) ? $attrs['project'] : 0;
                if(!$project) $project = $this->dao->select('project')->from(TABLE_BUG)->where('id')->eq($objectID)->fetch('project');
                $canView = strpos(',' . $this->app->user->view->projects . ',', ",$project,") !== false;
            }
        }
        elseif($objectType === 'task')
        {
            $project = isset($attrs['project']) ? $attrs['project'] : 0;
            if(!$project) $project = $this->dao->select('project')->from(TABLE_TASK)->where('id')->eq($objectID)->fetch('project');
            $canView = strpos(',' . $this->app->user->view->projects . ',', ",$project,") !== false;
        }
        elseif($objectType === 'feedback')
        {
            $product = isset($attrs['product']) ? $attrs['product'] : 0;
            if(!$product) $product = $this->dao->select('product')->from(TABLE_FEEDBACK)->where('id')->eq($objectID)->fetch('product');
            $canView = strpos(',' . $this->app->user->view->products . ',', ",$product,") !== false;
        }
        elseif($objectType === 'doc')
        {
            $api = isset($attrs['docType']) && $attrs['docType'] === 'api';
            $doc = $this->loadModel($api ? 'api' : 'doc')->getByID($objectID);
            $canView = $this->loadModel('doc')->checkPrivDoc($doc);
        }
        elseif($objectType === 'case')
        {
            $case = $this->loadModel('testcase')->getById($objectID);
            if(!$case)
            {
                static::$objectViews[$objectType][$objectID] = false;
                return false;
            }
            $project = isset($case->project) ? $case->project : 0;
            $product = isset($case->product) ? $case->product : 0;
            if($project && strpos(',' . $this->app->user->view->projects . ',', ",$project,") !== false) $canView = true;
            if(!$canView && $product && strpos(',' . $this->app->user->view->products . ',', ",$product,") !== false) $canView = true;

            if($canView)
            {
                static::$objectViews[$objectType][$objectID] = true;
                return true;
            }

            $libID = $case->lib;
            if($libID)
            {
                $lib = $this->loadModel('caselib')->getByID($libID);
                if($lib)
                {
                    $project = isset($lib->project) ? $lib->project : 0;
                    $product = isset($lib->product) ? $lib->product : 0;
                    if($project && strpos(',' . $this->app->user->view->projects . ',', ",$project,") !== false) $canView = true;
                    if(!$canView && $product && strpos(',' . $this->app->user->view->products . ',', ",$product,") !== false) $canView = true;
                }
            }
        }

        static::$objectViews[$objectType][$objectID] = $canView;
        return $canView;
    }

    /**
     * 过滤出有权限的知识。
     * Filter knowledges which has privilege.
     *
     * @access public
     * @param array  $knowledges
     * @param string $type     content|chunk
     * @param int    $limit
     * @return array
     */
    public function filterKnowledgesByPriv($knowledges, $type = 'content', $limit = 0)
    {
        $filteredKnowledges = array();
        $isChunk            = $type == 'chunk';
        $keyName            = $isChunk ? 'content_key' : 'key';
        $attrsName          = $isChunk ? 'content_attrs' : 'attrs';
        foreach($knowledges as $knowledge)
        {
            $key = isset($knowledge[$keyName]) ? $knowledge[$keyName] : '';
            if(empty($key)) continue;

            $keyParts = explode('-', $key);
            if(count($keyParts) < 2) continue;
            [$objectType, $objectID] = $keyParts;
            $attrs = isset($knowledge[$attrsName]) ? $knowledge[$attrsName] : null;
            if(!empty($attrs['objectType'])) $objectType = $attrs['objectType'];
            if(!empty($attrs['objectID']))   $objectID = $attrs['objectID'];

            if(!$this->canViewObject($objectType, $objectID, $attrs)) continue;

            $filteredKnowledges[] = $knowledge;

            if($limit > 0 && count($filteredKnowledges) >= $limit) break;
        }
        return $filteredKnowledges;
    }

    /**
     * 提取文件内容。
     * Extract file content.
     *
     * @access public
     * @param int|object $file
     * @return array
     */
    public function extractFileContent($file)
    {
        if(!is_object($file)) $file = $this->loadModel('file')->getByID($file);
        if(!is_object($file) || empty($file->realPath)) return null;

        $filePath = $file->realPath;
        $cFile    = new CURLFile($filePath, null, $file->title);
        $result   = $this->callAdminAPI('/v8/files/extract', 'POST', null, ['file' => $cFile]);

        if($result['result'] != 'success') return null;
        return $result['data'];
    }

    /**
     * 用户对象可查看缓存配置。
     * User object view cache configuration.
     *
     * @access public
     * @var array
     */
    static $objectViews = array();

    /**
     * 同步表。
     * Sync tables.
     *
     * @access public
     * @var array
     */
    static $syncTables = array
    (
        'story'    => TABLE_STORY,
        'demand'   => TABLE_DEMAND,
        'bug'      => TABLE_BUG,
        'doc'      => TABLE_DOC,
        'design'   => TABLE_DESIGN,
        'feedback' => TABLE_FEEDBACK
    );

    /**
     * 获取可同步的类型。
     * Get syncable types.
     *
     * @access public
     * @return array
     */
    public static function getSyncTypes()
    {
        global $app, $config;
        $types = $app->lang->zai->syncingTypeList;
        if($config->edition == 'open') unset($types['feedback']);
        if($config->edition != 'ipd')  unset($types['demand']);
        return $types;
    }

    /**
     * 获取下一个同步类型。
     * Get next sync type.
     *
     * @access public
     * @param string $currentType
     * @return string 下一个同步类型。The next sync type.
     */
    public static function getNextSyncType($currentType = '')
    {
        global $app;
        $types = array_keys(zaiModel::getSyncTypes());
        if(empty($currentType)) return $types[0];

        $currentIndex = array_search($currentType, $types);
        if($currentIndex === false) return $types[0];

        return isset($types[$currentIndex + 1]) ? $types[$currentIndex + 1] : null;
    }


    /**
     * 将目标对象转换为 Markdown 格式。
     * Convert target object to Markdown format.
     *
     * @access public
     * @param  string     $type
     * @param  object     $target
     * @param  array      $langData
     * @return array
     */
    public static function convertTargetToMarkdown($type, $target, $langData = [])
    {
        global $app;

        $funcName = 'convert' . ucfirst($type) . 'ToMarkdown';
        if(method_exists(static::class, $funcName))
        {
            $markdown = static::$funcName($target, $langData);
        }
        elseif($type === 'practice' || $type === 'component')
        {
            $markdown = static::convertDocToMarkdown($target);
        }
        else
        {
            $markdown = static::convertGenericToMarkdown($type, $target);
        }

        if(!isset($markdown['attrs']))               $markdown['attrs'] = array();
        if(!isset($markdown['attrs']['objectType'])) $markdown['attrs']['objectType'] = $type;
        if(!isset($markdown['attrs']['objectID']))   $markdown['attrs']['objectID'] = $target->id;
        if(!isset($markdown['attrs']['objectKey']))  $markdown['attrs']['objectKey'] = $type . '-' . $target->id;

        return $markdown;
    }

    /**
     * 将通用对象转换为 Markdown。
     * Convert generic object to Markdown format.
     *
     * @access public
     * @param  string $type
     * @param  object $target
     * @return array
     */
    public static function convertGenericToMarkdown($type, $target)
    {
        global $app;

        $typeName = zget($app->lang->zai->syncingTypeList, $type, ucfirst($type));
        $title    = '';

        if(isset($target->title) && $target->title !== '')   $title = $target->title;
        elseif(isset($target->name) && $target->name !== '') $title = $target->name;

        $id          = isset($target->id) ? $target->id : 0;
        $objectTitle = trim("$typeName #$id $title");

        return array(
            'id'      => $id,
            'title'   => $objectTitle,
            'content' => json_encode($target, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
            'attrs'   => array('objectTitle' => $objectTitle)
        );
    }

    /**
     * 获取字段标签。
     *
     * @param  array  $langData
     * @param  string $field
     * @return string
     */
    public static function getFieldLabel($langData, $field)
    {
        return isset($langData['fields'][$field]) ? $langData['fields'][$field] : '';
    }

    /**
     * 获取章节标签。
     *
     * @param  array  $langData
     * @param  string $section
     * @return string
     */
    public static function getSectionLabel($langData, $section)
    {
        return isset($langData['sections'][$section]) ? $langData['sections'][$section] : '';
    }

    /**
     * 格式化字段值。
     *
     * @param  array       $langData
     * @param  string      $field
     * @param  mixed       $value
     * @return string
     */
    public static function formatFieldValue($langData, $field, $value)
    {
        if($value === null) return '';

        if(is_array($value))
        {
            $parts = array();
            foreach($value as $item)
            {
                $formatted = static::formatFieldValue($langData, $field, $item);
                if($formatted !== '') $parts[] = $formatted;
            }
            return $parts ? implode('，', $parts) : '';
        }

        if(is_object($value))
        {
            $value = json_decode(json_encode($value, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES), true);
            return static::formatFieldValue($langData, $field, $value);
        }

        $valueString = (string)$value;
        if($valueString === '') return '';

        if(isset($langData['maps'][$field]) && isset($langData['maps'][$field][$valueString]))
        {
            return (string)$langData['maps'][$field][$valueString];
        }

        return $valueString;
    }

    /**
     * 附加字段列表。
     *
     * @param  array $content
     * @param  array $langData
     * @param  array $fieldPairs
     * @return void
     */
    public static function appendFieldList(&$content, $langData, $fieldPairs)
    {
        foreach($fieldPairs as $field => $value)
        {
            $label = static::getFieldLabel($langData, $field);
            if($label === '') continue;

            $formatted = static::formatFieldValue($langData, $field, $value);
            $content[] = "* {$label}: {$formatted}";
        }
    }

    /**
     * 附加详情章节。
     *
     * @param  array  $content
     * @param  array  $langData
     * @param  string $sectionKey
     * @param  mixed  $rawValue
     * @return void
     */
    public static function appendDetailSection(&$content, $langData, $sectionKey, $rawValue)
    {
        if($rawValue === null) return;

        if(is_array($rawValue) || is_object($rawValue))
        {
            $rawValue = json_encode($rawValue, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        }

        $text  = trim((string)$rawValue);
        $plain = $text === '' ? '' : trim(strip_tags($text));

        $label = static::getSectionLabel($langData, $sectionKey);
        if($label === '') $label = static::getFieldLabel($langData, $sectionKey);
        if($label === '') return;

        $content[] = "\n## {$label}\n\n" . $plain;
    }

    /**
     * 附加里程碑章节。
     *
     * @param  array $content
     * @param  array $langData
     * @param  mixed $milestones
     * @return void
     */
    public static function appendMilestoneSection(&$content, $langData, $milestones)
    {
        if(empty($milestones)) return;

        $label = static::getSectionLabel($langData, 'milestone');
        if($label === '') $label = static::getFieldLabel($langData, 'milestone');
        if($label === '') return;

        $content[] = "\n## {$label}";
        foreach((array)$milestones as $milestone)
        {
            if(is_object($milestone)) $milestone = (array)$milestone;
            $name = isset($milestone['name']) ? trim((string)$milestone['name']) : '';
            $date = isset($milestone['date']) ? trim((string)$milestone['date']) : '';
            $line = $name;
            if($date !== '') $line = $line === '' ? $date : "{$line} ({$date})";
            if($line !== '') $content[] = "- {$line}";
        }
    }

    /**
     * 构建用例步骤文本。
     * Build test case steps markdown text.
     *
     * @param  mixed $steps
     * @param  array $langData
     * @return string
     */
    public static function buildCaseStepsText($steps, $langData)
    {
        if(empty($steps)) return '';

        if(is_string($steps)) return trim($steps);

        if(is_object($steps)) $steps = json_decode(json_encode($steps, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES), true);

        if(!is_array($steps)) return '';

        $lines       = array();
        $index       = 1;
        $expectLabel = static::getFieldLabel($langData, 'expect');
        if($expectLabel === '') $expectLabel = static::getFieldLabel($langData, 'expects');

        foreach($steps as $step)
        {
            if(is_object($step)) $step = (array)$step;
            if(!is_array($step)) continue;

            $desc   = trim((string)($step['desc'] ?? $step['title'] ?? $step['step'] ?? ''));
            $expect = trim((string)($step['expect'] ?? $step['expects'] ?? ''));

            $line = $desc !== '' ? "{$index}. {$desc}" : "{$index}.";
            if($expect !== '')
            {
                $label = $expectLabel !== '' ? $expectLabel : 'Expect';
                $line .= " ({$label}: {$expect})";
            }

            $lines[] = $line;
            $index++;
        }

        return $lines ? implode("\n", $lines) : '';
    }

    /**
     * 收集需要展示的字段列表。
     * Collect field-value pairs for markdown listing.
     *
     * @param  string $objectType
     * @param  array  $langData
     * @param  object $target
     * @return array
     */
    public static function collectFieldPairs($objectType, $langData, $target)
    {
        if(empty($langData['fields']) || !is_array($langData['fields'])) return array();

        $pairs      = array();
        $skipFields = array('desc', 'prevention', 'remedy', 'resolution', 'history', 'resolutionComment', 'steps', 'precondition', 'expect');

        foreach($langData['fields'] as $fieldKey => $label)
        {
            if($fieldKey === 'actions') continue;
            if(in_array($fieldKey, $skipFields, true)) continue;

            $pairs[$fieldKey] = static::extractFieldValue($objectType, $fieldKey, $target);
        }

        return $pairs;
    }

    /**
     * 获取指定字段的值。
     * Get field value from target with alias support.
     *
     * @param  string $objectType
     * @param  string $field
     * @param  object $target
     * @return mixed
     */
    public static function extractFieldValue($objectType, $field, $target)
    {
        $data = (array)$target;
        if(array_key_exists($field, $data)) return $data[$field];

        $aliases = static::getFieldAliasMap($objectType);
        if(isset($aliases[$field]))
        {
            foreach((array)$aliases[$field] as $alias)
            {
                if(array_key_exists($alias, $data)) return $data[$alias];
            }
        }

        $snake = strtolower(preg_replace('/([a-z])([A-Z])/', '$1_$2', $field));
        if($snake !== $field && array_key_exists($snake, $data)) return $data[$snake];

        if(array_key_exists($field . 'Text', $data)) return $data[$field . 'Text'];

        return null;
    }

    /**
     * 获取字段别名映射。
     * Get alias map for field values.
     *
     * @param  string $objectType
     * @return array
     */
    public static function getFieldAliasMap($objectType)
    {
        static $aliasMap = array(
            'issue' => array(
                'assetCreatedBy'   => array('assetCreatedBy', 'createdBy', 'openedBy'),
                'assetCreatedDate' => array('assetCreatedDate', 'createdDate', 'openedDate'),
                'issueType'        => array('issueType', 'type'),
                'execution'        => array('execution', 'executionName'),
                'project'          => array('project', 'projectName'),
                'resolution'       => array('resolution', 'resolutionType'),
                'deadline'         => array('deadline', 'deadLine'),
            ),
            'risk' => array(
                'assetCreatedBy'   => array('assetCreatedBy', 'createdBy', 'openedBy'),
                'assetCreatedDate' => array('assetCreatedDate', 'createdDate', 'openedDate'),
                'project'          => array('project', 'projectName'),
                'execution'        => array('execution', 'executionName'),
            ),
            'opportunity' => array(
                'assetCreatedBy'   => array('assetCreatedBy', 'createdBy', 'openedBy'),
                'assetCreatedDate' => array('assetCreatedDate', 'createdDate', 'openedDate'),
                'project'          => array('project', 'projectName'),
                'opportunityType'  => array('opportunityType', 'type'),
            ),
            'plan' => array(
                'begin'    => array('begin', 'start', 'beginDate'),
                'end'      => array('end', 'finish', 'endDate'),
                'owner'    => array('owner', 'assignedTo'),
                'stories'  => array('stories', 'storyCount', 'story'),
                'bugs'     => array('bugs', 'bugCount', 'bug'),
                'project'  => array('project', 'projectName'),
                'product'  => array('product', 'productName'),
            ),
            'release' => array(
                'system'       => array('system', 'systemName'),
                'project'      => array('project', 'projectName'),
                'build'        => array('build', 'buildName'),
                'releasedDate' => array('releasedDate', 'releaseDate'),
            ),
            'ticket' => array(
                'openedBy'     => array('openedBy', 'createdBy'),
                'openedDate'   => array('openedDate', 'createdDate'),
                'subStatus'    => array('subStatus'),
                'closedReason' => array('closedReason'),
                'project'      => array('project', 'projectName'),
                'product'      => array('product', 'productName'),
                'ticketType'   => array('ticketType', 'type'),
            ),
            'feedback' => array(
                'feedbackType' => array('feedbackType', 'type'),
            ),
            'case' => array(
                'execution'     => array('execution', 'executionName'),
                'module'        => array('module', 'moduleName'),
                'story'         => array('story', 'storyID'),
                'lastEditedBy'  => array('lastEditedBy', 'editedBy'),
                'lastEditedDate'=> array('lastEditedDate', 'editedDate'),
            ),
            'story' => array(
                'plan'         => array('plan', 'planTitle'),
                'planTitle'    => array('planTitle', 'plan'),
                'openedBy'     => array('openedBy', 'createdBy'),
                'openedDate'   => array('openedDate', 'createdDate'),
                'assignedTo'   => array('assignedTo', 'owner'),
                'branch'       => array('branch', 'branchName'),
                'module'       => array('module', 'moduleName'),
                'stage'        => array('stage', 'statusStage'),
            ),
            'bug' => array(
                'openedBy'     => array('openedBy', 'createdBy'),
                'openedDate'   => array('openedDate', 'createdDate'),
                'resolvedBy'   => array('resolvedBy'),
                'resolvedDate' => array('resolvedDate'),
                'assignedTo'   => array('assignedTo'),
            ),
        );

        return $aliasMap[$objectType] ?? array();
    }

    /**
     * 获取用户字段映射。
     * Get user fields map for object type.
     *
     * @param  string $objectType
     * @return array
     */
    public static function getUserFieldsMap($objectType)
    {
        $map = array(
            'story'      => array('openedBy', 'assignedTo', 'reviewedBy', 'stagedBy'),
            'bug'        => array('openedBy', 'assignedTo', 'resolvedBy', 'closedBy', 'feedbackBy'),
            'task'       => array('openedBy', 'assignedTo', 'finishedBy', 'canceledBy', 'closedBy'),
            'feedback'   => array('openedBy', 'assignedTo', 'reviewedBy', 'closedBy', 'processedBy', 'feedbackBy'),
            'ticket'     => array('openedBy', 'assignedTo', 'startedBy', 'closedBy'),
            'issue'      => array('assetCreatedBy', 'assignedTo'),
            'risk'       => array('assetCreatedBy', 'assignedTo'),
            'opportunity'=> array('assetCreatedBy', 'assignedTo'),
            'plan'       => array('owner'),
            'case'       => array('openedBy', 'lastEditedBy', 'lastRunner'),
            'release'    => array('owner'),
            'demand'     => array('createdBy', 'assignedTo'),
            'design'     => array('createdBy', 'assignedTo'),
            'doc'        => array('owner', 'addedBy', 'editedBy'),
        );

        return $map[$objectType] ?? array();
    }

    /**
     * 转换用户字段为真实姓名。
     * Convert user account fields to realname.
     *
     * @param  string $objectType
     * @param  object $target
     * @return object
     */
    public static function convertUserFieldToRealname($objectType, $target)
    {
        $userFields = static::getUserFieldsMap($objectType);
        if(empty($userFields)) return $target;

        global $app;
        $userModel = $app->loadTarget('user', '', 'model');

        $userAccounts = array();
        foreach($userFields as $field)
        {
            $value = static::extractFieldValue($objectType, $field, $target);
            if(!empty($value))
            {
                $accounts = is_array($value) ? $value : explode(',', trim($value));
                foreach($accounts as $account)
                {
                    $account = trim($account);
                    if($account && $account !== '') $userAccounts[$account] = $account;
                }
            }
        }

        if(empty($userAccounts)) return $target;

        $userPairs = $userModel->getPairs('realname,noletter', '', 0, array_keys($userAccounts));

        $converted = clone $target;

        foreach($userFields as $field)
        {
            $value = static::extractFieldValue($objectType, $field, $target);
            if(empty($value)) continue;

            $accounts = is_array($value) ? $value : explode(',', trim($value));
            $realnames = array();
            foreach($accounts as $account)
            {
                $account = trim($account);
                if($account && isset($userPairs[$account]))
                {
                    $realnames[] = $userPairs[$account];
                }
                elseif($account)
                {
                    $realnames[] = $account;
                }
            }
            if(!empty($realnames)) $converted->$field = implode(', ', $realnames);
        }

        return $converted;
    }

    /**
     * 将 STORY 对象转换为 Markdown 格式。
     * Convert story object to Markdown format.
     *
     * @access public
     * @param object $story
     * @return array
     * @param mixed[] $langData
     */
    public static function convertStoryToMarkdown($story, $langData = [])
    {
        global $app;

        $story = static::convertUserFieldToRealname('story', $story);

        $app->loadLang('story');
        $lang = $app->lang;

        $spec = $app->dao->select('title,spec,verify,files,docs,docVersions')->from(TABLE_STORYSPEC)->where('story')->eq($story->id)->andWhere('version')->eq($story->version)->fetch();
        if(empty($spec)) $spec = (object)array('title' => $story->title, 'spec' => '', 'verify' => '', 'files' => '', 'docs' => '', 'docVersions' => '');

        $planValue = $story->plan;
        if(!empty($planValue))
        {
            $planIDs   = explode(',', trim($planValue));
            $planNames = array();
            foreach($planIDs as $planID)
            {
                $planID = trim($planID);
                if(empty($planID) || !is_numeric($planID)) continue;

                $plan = $app->dao->select('title')->from(TABLE_PRODUCTPLAN)->where('id')->eq($planID)->fetch();
                if($plan && !empty($plan->title))
                {
                    $planNames[] = $plan->title;
                }
                else
                {
                    $planNames[] = $planID;
                }
            }

            if(!empty($planNames))
            {
                $planValue = implode(', ', $planNames);
            }
        }

        $content  = array();
        $content[] = "# {$lang->SRCommon} #$story->id $story->title\n";
        $content[] = "## {$lang->story->legendBasicInfo}\n";
        $content[] = "* {$lang->story->status}: " . zget($lang->story->statusList, $story->status);
        $content[] = "* {$lang->story->stage}: " . zget($lang->story->stageList, $story->stage);
        $content[] = "* {$lang->story->pri}: " . zget($lang->story->priList, $story->pri);
        $content[] = "* {$lang->story->version}: $story->version";
        $content[] = "* {$lang->story->category}: " . zget($lang->story->categoryList, $story->category);
        $content[] = "* {$lang->story->source}: " . zget($lang->story->sourceList, $story->source);
        $content[] = "* {$lang->story->estimate}: $story->estimate";
        $content[] = "* {$lang->story->product}: $story->product";
        $content[] = "* {$lang->story->plan}: $planValue";
        $content[] = "* {$lang->story->branch}: $story->branch";
        $content[] = "* {$lang->story->parent}: " . (is_array($story->parent) ? implode(',', $story->parent) : $story->parent);
        $content[] = "* {$lang->story->module}: $story->module";
        $content[] = "* {$lang->story->keywords}: $story->keywords";
        $content[] = "* {$lang->story->assign}: $story->assignedTo";
        $content[] = "* {$lang->story->assignedDate}: $story->assignedDate";
        $content[] = "* {$lang->story->reviewedDate}: $story->reviewedDate";
        $content[] = "* {$lang->story->reviewedBy}: $story->reviewedBy";
        $content[] = "* {$lang->story->openedBy}: $story->openedBy";
        $content[] = "* {$lang->story->openedDate}: $story->openedDate";
        $content[] = "* {$lang->story->stagedBy}: $story->stagedBy";
        $content[] = "\n## {$lang->story->spec}\n";
        $content[] = strip_tags($spec->spec) . "\n";
        $content[] = "## {$lang->story->verify}\n";
        $content[] = strip_tags($spec->verify) . "\n";

        $markdown = array('id' => $story->id, 'title' => "$lang->SRCommon #$story->id $spec->title");
        $markdown['content'] = implode("\n", $content);
        $markdown['attrs']   = array(
            'product'       => $story->product,
            'parentStory'   => $story->parent,
            'productModule' => $story->module,
            'productBranch' => $story->branch,
            'productPlan'   => $planValue,
            'status'        => $story->status,
            'stage'         => $story->stage
        );
        if(isset($story->lib)) $markdown['attrs']['lib'] = $story->lib;

        return $markdown;
    }

    /**
     * 将 CASE 对象转换为 Markdown 格式。
     * Convert case object to Markdown format.
     *
     * @access public
     * @param  object     $case
     * @param  array      $langData
     * @return array
     */
    public static function convertCaseToMarkdown($case, $langData = [])
    {
        $case = static::convertUserFieldToRealname('case', $case);

        $id    = $case->id ?? 0;
        $title = trim((string)($case->title ?? $case->name ?? ''));

        $typeName = isset($langData['common']) ? $langData['common'] : '';
        $header   = trim(($typeName !== '' ? "{$typeName} " : '') . "#$id $title");
        if($header === '') $header = "#$id $title";

        $markdown = array('id' => $id, 'title' => $header);
        $content  = array();
        $content[] = "# {$header}\n";

        $sectionBasic = static::getSectionLabel($langData, 'basic');
        if($sectionBasic !== '') $content[] = "## {$sectionBasic}\n";

        $fieldPairs = static::collectFieldPairs('case', $langData, $case);
        static::appendFieldList($content, $langData, $fieldPairs);

        static::appendDetailSection($content, $langData, 'precondition', $case->precondition ?? null);

        $stepsText = static::buildCaseStepsText($case->steps ?? null, $langData);
        if($stepsText !== '') static::appendDetailSection($content, $langData, 'steps', $stepsText);

        static::appendDetailSection($content, $langData, 'expect', $case->expect ?? ($case->expects ?? null));

        $markdown['content'] = implode("\n", $content);
        $markdown['attrs']   = array(
            'product'      => $case->product         ?? '',
            'module'       => $case->module          ?? '',
            'project'      => $case->project         ?? '',
            'execution'    => $case->execution       ?? '',
            'branch'       => $case->branch          ?? '',
            'path'         => $case->path            ?? '',
            'story'        => $case->story           ?? '',
            'storyVersion' => $case->storyVersion    ?? '',
            'pri'          => $case->pri             ?? '',
            'type'         => $case->type            ?? '',
            'status'       => $case->status          ?? '',
            'stage'        => $case->stage           ?? '',
            'lib'          => $case->lib             ?? ''
        );

        return $markdown;
    }

    /**
     * 将 DEMAND 对象转换为 Markdown 格式。
     * Convert demand object to Markdown format.
     *
     * @access public
     * @param object $demand
     * @return array
     * @param mixed[] $langData
     */
    public static function convertDemandToMarkdown($demand, $langData = [])
    {
        global $app;

        $demand = static::convertUserFieldToRealname('demand', $demand);

        $app->loadLang('demand');
        $lang = $app->lang;

        $spec = $app->dao->select('title,spec,verify')->from(TABLE_DEMANDSPEC)->where('demand')->eq($demand->id)->andWhere('version')->eq($demand->version)->fetch();
        if(empty($spec)) $spec = (object)array('title' => $demand->title, 'spec' => '', 'verify' => '');

        $markdown = array('id' => $demand->id, 'title' => "$lang->SRCommon #$demand->id $spec->title");
        $content  = array();
        $content[] = "# {$lang->demand->common} #$demand->id $demand->title\n";
        $content[] = "## {$lang->demand->legendBasicInfo}\n";
        $content[] = "* {$lang->demand->status}: " . zget($lang->demand->statusList, $demand->status);
        $content[] = "* {$lang->demand->stage}: " . zget($lang->demand->stageList, $demand->stage);
        $content[] = "* {$lang->demand->pri}: " . zget($lang->demand->priList, $demand->pri);
        $content[] = "* {$lang->demand->version}: $demand->version";
        $content[] = "* {$lang->demand->category}: " . zget($lang->demand->categoryList, $demand->category);
        $content[] = "* {$lang->demand->source}: " . zget($lang->demand->sourceList, $demand->source);
        $content[] = "* {$lang->demand->product}: $demand->product";
        $content[] = "* {$lang->demand->parent}: $demand->parent";
        $content[] = "* {$lang->demand->module}: $demand->module";
        $content[] = "* {$lang->demand->keywords}: $demand->keywords";
        $content[] = "* {$lang->demand->assignedTo}: $demand->assignedTo";
        $content[] = "* {$lang->demand->assignedDate}: $demand->assignedDate";
        $content[] = "* {$lang->demand->createdBy}: $demand->createdBy";
        $content[] = "* {$lang->demand->createdDate}: $demand->createdDate";
        $content[] = "* {$lang->demand->changedBy}: $demand->changedBy";
        $content[] = "* {$lang->demand->changedDate}: $demand->changedDate";
        $content[] = "* {$lang->demand->closedBy}: $demand->closedBy";
        $content[] = "* {$lang->demand->closedDate}: $demand->closedDate";
        $content[] = "* {$lang->demand->closedReason}: $demand->closedReason";
        $content[] = "* {$lang->demand->submitedBy}: $demand->submitedBy";
        $content[] = "* {$lang->demand->distributedBy}: $demand->distributedBy";
        $content[] = "* {$lang->demand->distributedDate}: $demand->distributedDate";
        $content[] = "## {$lang->demand->spec}\n";
        $content[] = strip_tags($spec->spec) . "\n";
        $content[] = "## {$lang->demand->verify}\n";
        $content[] = strip_tags($spec->verify) . "\n";

        $markdown['content'] = implode("\n", $content);

        $markdown['attrs'] = array('product' => $demand->product, 'parentDemand' => $demand->parent, 'productModule' => $demand->module, 'status' => $demand->status, 'stage' => $demand->stage);
        return $markdown;
    }

    /**
     * 将 BUG 对象转换为 Markdown 格式。
     * Convert bug object to markdown format.
     *
     * @access public
     * @param object $bug
     * @return array
     * @param mixed[] $langData
     */
    public static function convertBugToMarkdown($bug, $langData = [])
    {
        global $app;

        $bug = static::convertUserFieldToRealname('bug', $bug);

        $app->loadLang('bug');
        $lang = $app->lang;

        $markdown = array('id' => $bug->id, 'title' => "{$lang->bug->common} #$bug->id $bug->title");
        $content  = array();

        $content[] = "# {$lang->bug->common} #$bug->id $bug->title\n";
        $content[] = "## {$lang->bug->legendBasicInfo}\n";
        $content[] = "* {$lang->bug->pri}: " . zget($lang->bug->priList, $bug->pri);
        $content[] = "* {$lang->bug->severity}: " . zget($lang->bug->severityList, $bug->severity);
        $content[] = "* {$lang->bug->status}: " . zget($lang->bug->statusList, $bug->status);
        $content[] = "* {$lang->bug->resolution}: " . zget($lang->bug->resolutionList, $bug->resolution);
        $content[] = "* {$lang->bug->type}: " . zget($lang->bug->typeList, $bug->type);
        $content[] = "* {$lang->bug->product}: $bug->product";
        $content[] = "* {$lang->bug->project}: $bug->project";
        $content[] = "* {$lang->bug->execution}: $bug->execution";
        $content[] = "* {$lang->bug->module}: $bug->module";
        $content[] = "* {$lang->bug->branch}: $bug->branch";
        $content[] = "* {$lang->bug->plan}: $bug->plan";
        $content[] = "* {$lang->bug->story}: $bug->story";
        $content[] = "* {$lang->bug->relatedBug}: $bug->relatedBug";
        $content[] = "* {$lang->bug->keywords}: $bug->keywords";
        $content[] = "* {$lang->bug->resolvedBy}: $bug->resolvedBy";
        $content[] = "* {$lang->bug->resolvedDate}: $bug->resolvedDate";
        $content[] = "* {$lang->bug->resolvedBuild}: $bug->resolvedBuild";
        $content[] = "* {$lang->bug->openedBy}: $bug->openedBy";
        $content[] = "* {$lang->bug->openedDate}: $bug->openedDate";
        $content[] = "* {$lang->bug->openedBuild}: $bug->openedBuild";
        $content[] = "* {$lang->bug->assignedTo}: $bug->assignedTo";
        $content[] = "* {$lang->bug->assignedDate}: $bug->assignedDate";
        $content[] = "* {$lang->bug->closedBy}: $bug->closedBy";
        $content[] = "* {$lang->bug->closedDate}: $bug->closedDate";
        $content[] = "* {$lang->bug->feedbackBy}: $bug->feedbackBy";
        $content[] = "* {$lang->bug->activatedDate}: $bug->activatedDate";
        $content[] = "\n## {$lang->bug->steps}\n";
        $content[] = strip_tags($bug->steps) . "\n";

        $markdown['content'] = implode("\n", $content);

        $markdown['attrs'] = array('product' => $bug->product, 'module' => $bug->module, 'branch' => $bug->branch, 'plan' => $bug->plan, 'relatedBug' => $bug->relatedBug, 'story' => $bug->story, 'task' => $bug->task);
        return $markdown;
    }

    /**
     * 将任务对象转换为 Markdown 格式。
     * Convert task object to markdown format.
     *
     * @param  object $task
     * @access public
     * @return array
     * @param mixed[] $langData
     */
    public static function convertTaskToMarkdown($task, $langData = [])
    {
        global $app;

        $task = static::convertUserFieldToRealname('task', $task);

        $app->loadLang('task');
        $lang = $app->lang;

        $markdown = array('id' => $task->id, 'title' => "{$lang->task->common} #$task->id $task->name");
        $content  = array();

        $content[] = "# {$lang->task->common} #$task->id $task->name\n";
        $content[] = "## {$lang->task->legendBasic}\n";
        $content[] = "* {$lang->task->project}: $task->project";
        $content[] = "* {$lang->task->execution}: $task->execution";
        $content[] = "* {$lang->task->module}: $task->module";
        $content[] = "* {$lang->task->fromBug}: $task->fromBug";
        $content[] = "* {$lang->task->feedback}: $task->feedback";
        $content[] = "* {$lang->task->story}: $task->storyID";
        $content[] = "* {$lang->task->assignedTo}: $task->assignedTo";
        $content[] = "* {$lang->task->assignedDate}: $task->assignedDate";
        $content[] = "* {$lang->task->type}: " . zget($lang->task->typeList, $task->type);
        $content[] = "* {$lang->task->status}: " . zget($lang->task->statusList, $task->status);
        $content[] = "* {$lang->task->pri}: " . zget($lang->task->priList, $task->pri);
        $content[] = "* {$lang->task->keywords}: $task->keywords";
        $content[] = "* {$lang->task->mailto}: $task->mailto";
        $content[] = "## {$lang->task->legendEffort}\n";
        $content[] = "* {$lang->task->estimate}: $task->estimate";
        $content[] = "* {$lang->task->consumed}: $task->consumed";
        $content[] = "* {$lang->task->left}: $task->left";
        $content[] = "* {$lang->task->estStarted}: $task->estStarted";
        $content[] = "* {$lang->task->realStarted}: $task->realStarted";
        $content[] = "* {$lang->task->deadline}: $task->deadline";
        $content[] = "## {$lang->task->legendLife}\n";
        $content[] = "* {$lang->task->openedBy}: $task->openedBy";
        $content[] = "* {$lang->task->openedDate}: $task->openedDate";
        $content[] = "* {$lang->task->finishedBy}: $task->finishedBy";
        $content[] = "* {$lang->task->finishedDate}: $task->finishedDate";
        $content[] = "* {$lang->task->canceledBy}: $task->canceledBy";
        $content[] = "* {$lang->task->canceledDate}: $task->canceledDate";
        $content[] = "* {$lang->task->closedBy}: $task->closedBy";
        $content[] = "* {$lang->task->closedDate}: $task->closedDate";
        $content[] = "* {$lang->task->closedReason}: $task->closedReason";
        $content[] = "\n## {$lang->task->desc}\n";
        $content[] = strip_tags($task->desc) . "\n";

        $markdown['content'] = implode("\n", $content);

        $markdown['attrs'] = array('project' => $task->project, 'module' => $task->module, 'design' => $task->design, 'fromBug' => $task->fromBug, 'story' => $task->storyID);
        return $markdown;
    }

    /**
     * 将 DOC 对象转换为 Markdown 格式。
     * Convert doc object to markdown format.
     *
     * @access public
     * @param object $doc
     * @return array
     * @param mixed[] $langData
     */
    public static function convertDocToMarkdown($doc, $langData = [])
    {
        global $app;

        $doc = static::convertUserFieldToRealname('doc', $doc);

        $app->loadLang('doc');
        $lang = $app->lang;

        if(isset($doc->protocol) || !empty($doc->api))
        {
            $app->loadLang('api');
            $markdown = array('id' => $doc->id, 'title' => "{$lang->doc->common} #$doc->id $doc->title");
            $content  = array();

            $content[] = "# {$app->lang->api->common} #$doc->id $doc->title\n";
            $content[] = "## {$lang->doc->basicInfo}\n";
            $content[] = "* {$lang->doc->product}: $doc->product";
            $content[] = "* {$lang->doc->lib}: $doc->lib";
            $content[] = "* {$app->lang->api->module}: $doc->module";
            $content[] = "* {$app->lang->api->title}: $doc->title";
            $content[] = "* {$app->lang->api->path}: $doc->path";
            $content[] = "* {$app->lang->api->protocol}: $doc->protocol";
            $content[] = "* {$app->lang->api->method}: $doc->method";
            $content[] = "* {$app->lang->api->requestType}: $doc->requestType";
            $content[] = "* {$app->lang->api->status}: " . zget($app->lang->api->statusOptions, $doc->status);
            $content[] = "* {$app->lang->api->owner}: $doc->owner";
            $content[] = "* {$app->lang->api->version}: $doc->version";

            if(!empty($doc->params->header))
            {
                $content[] = "\n## {$app->lang->api->header}\n";
                $content[] = "| {$app->lang->api->req->name} | {$app->lang->api->req->required} | {$app->lang->api->req->desc} |\n";
                $content[] = "|------|---|---------|\n";
                foreach($doc->params->header as $item)
                {
                    if(is_array($item))   $item = (object)$item;
                    if(!is_object($item)) continue;

                    $desc      = strip_tags($item->desc);
                    $required  = zget($lang->api->boolList, $item->required);
                    $content[] = "| {$item->field} | $required | $desc |\n";
                }
            }
            if(!empty($doc->params->query))
            {
                $content[] = "\n## {$app->lang->api->query}\n";
                $content[] = "| {$app->lang->api->req->name} | {$app->lang->api->req->required} | {$app->lang->api->req->desc} |\n";
                $content[] = "|------|---|---------|\n";
                foreach($doc->params->query as $item)
                {
                    if(is_array($item))   $item = (object)$item;
                    if(!is_object($item)) continue;

                    $desc      = strip_tags($item->desc);
                    $required  = zget($lang->api->boolList, $item->required);
                    $content[] = "| {$item->field} | $required | $desc |\n";
                }
            }
            if(!empty($doc->params->params))
            {
                $content[] = "\n## {$app->lang->api->params}\n";
                $content[] = "| {$app->lang->api->req->name} | {$app->lang->api->req->type} | {$app->lang->api->req->required} | {$app->lang->api->req->desc} |\n";
                $content[] = "|------|---|---|---------|\n";
                foreach($doc->params->params as $item)
                {
                    if(is_array($item))   $item = (object)$item;
                    if(!is_object($item)) continue;

                    $desc      = strip_tags($item->desc);
                    $required  = zget($lang->api->boolList, $item->required);
                    $content[] = "| {$item->field} | {$item->paramsType} | $required | $desc |\n";
                }
            }
            if(!empty($doc->paramsExample))
            {
                $content[] = "\n## {$app->lang->api->paramsExample}\n";
                $content[] = "```json\n" . htmlspecialchars_decode($doc->paramsExample) . "\n```";
            }
            if(!empty($doc->response))
            {
                $content[] = "\n## {$app->lang->api->response}\n";
                $content[] = "| {$app->lang->api->req->name} | {$app->lang->api->req->required} | {$app->lang->api->req->desc} |\n";
                $content[] = "|------|---|---------|\n";
                foreach($doc->response as $item)
                {
                    if(is_array($item))   $item = (object)$item;
                    if(!is_object($item)) continue;

                    $desc      = strip_tags($item->desc);
                    $required  = zget($lang->api->boolList, $item->required);
                    $content[] = "| {$item->field} | $required | $desc |\n";
                }
            }
            if(!empty($doc->responseExample))
            {
                $content[] = "\n## {$app->lang->api->responseExample}\n";
                $content[] = "```json\n" . htmlspecialchars_decode($doc->responseExample) . "\n```";
            }

            $content[] = "\n## {$app->lang->api->desc}\n";
            $content[] = strip_tags($doc->desc) . "\n";

            $markdown['content'] = implode("\n", $content);
            $markdown['attrs'] = array('product' => $doc->product, 'lib' => $doc->lib, 'module' => $doc->module, 'version' => $doc->version, 'docType' => 'api');
        }
        else
        {
            $docContent = $app->dao->select('*')->from(TABLE_DOCCONTENT)->where('doc')->eq($doc->id)->andWhere('version')->eq($doc->version)->fetch();
            if(empty($docContent))
            {
                $docContent = new stdClass();
                $docContent->title   = $doc->title;
                $docContent->content = isset($doc->content) ? $doc->content : '';
            }

            $markdown = array('id' => $doc->id, 'title' => "{$lang->doc->common} #$doc->id $docContent->title");
            $content  = array();

            $content[] = "# {$lang->doc->common} #$doc->id $docContent->title\n";
            $content[] = "## {$lang->doc->basicInfo}\n";
            $content[] = "* {$lang->doc->title}: $docContent->title";
            $content[] = "* {$lang->doc->type}: " . zget($lang->doc->typeList, $doc->type);
            $content[] = "* {$lang->doc->product}: $doc->product";
            $content[] = "* {$lang->doc->project}: $doc->project";
            $content[] = "* {$lang->doc->execution}: $doc->execution";
            $content[] = "* {$lang->doc->version}: $doc->version";
            $content[] = "* {$lang->doc->lib}: $doc->lib";
            $content[] = "* {$lang->doc->module}: $doc->module";

            $content[] = "\n---\n";
            $content[] = strip_tags($docContent->content) . "\n";

            $markdown['content'] = implode("\n", $content);
            $markdown['attrs'] = array('objectTitle' => $markdown['title'], 'product' => $doc->product, 'lib' => $doc->lib, 'module' => $doc->module, 'project' => $doc->project, 'execution' => $doc->execution, 'type' => $doc->type, 'version' => $doc->version);
        }

        return $markdown;
    }

    /**
     * 将 DESIGN 对象转换为 Markdown 格式。
     * Convert design object to markdown format.
     *
     * @access public
     * @param object $design
     * @return array
     * @param mixed[] $langData
     */
    public static function convertDesignToMarkdown($design, $langData = [])
    {
        global $app;

        $design = static::convertUserFieldToRealname('design', $design);

        $app->loadLang('design');
        $lang = $app->lang;

        $designSpec = $app->dao->select('*')->from(TABLE_DESIGNSPEC)->where('design')->eq($design->id)->andWhere('version')->eq($design->version)->fetch();
        if(empty($designSpec)) $designSpec = (object)array('name' => $design->name, 'desc' => '');
        $markdown = array('id' => $design->id, 'title' => "{$lang->design->common} #$design->id $designSpec->name");
        $content  = array();

        $content[] = "# {$lang->design->common} #$design->id $designSpec->name\n";
        $content[] = "## {$lang->design->basicInfo}\n";
        $content[] = "* {$lang->design->type}: " . zget($lang->design->typeList, $design->type);
        $content[] = "* {$lang->design->product}: $design->product";
        $content[] = "* {$lang->design->project}: $design->project";
        $content[] = "* {$lang->design->story}: $design->story";
        $content[] = "* {$lang->design->version}: $design->version";
        $content[] = "* {$lang->design->assignedTo}: $design->assignedTo";
        $content[] = "* {$lang->design->createdBy}: $design->createdBy";
        $content[] = "* {$lang->design->createdDate}: $design->createdDate";

        $content[] = "\n## {$lang->design->desc}\n";
        $content[] = strip_tags($designSpec->desc) . "\n";

        $markdown['content'] = implode("\n", $content);

        $markdown['attrs'] = array('objectTitle' => $markdown['title'],'product' => $design->product, 'story' => $design->story, 'project' => $design->project, 'execution' => $design->execution, 'type' => $design->type);
        return $markdown;
    }

    /**
     * 将 FEEDBACK 对象转换为 Markdown 格式。
     * Convert feedback object to markdown format.
     *
     * @access public
     * @param object $feedback
     * @return array
     * @param mixed[] $langData
     */
    public static function convertFeedbackToMarkdown($feedback, $langData = [])
    {
        global $app;

        $feedback = static::convertUserFieldToRealname('feedback', $feedback);

        $app->loadLang('feedback');
        $lang = $app->lang;

        $markdown     = array('id' => $feedback->id, 'title' => "{$lang->feedback->common} #$feedback->id $feedback->title");
        $content      = array();
        $feedbackType = $feedback->feedbackType ?? $feedback->type ?? '';

        $content[] = "# {$lang->feedback->common} #$feedback->id $feedback->title\n";
        $content[] = "## {$lang->feedback->labelBasic}\n";
        $content[] = "* {$lang->feedback->feedbackBy}: $feedback->feedbackBy";
        $content[] = "* {$lang->feedback->type}: " . zget($lang->feedback->typeList, $feedbackType);
        $content[] = "* {$lang->feedback->pri}: " . zget($lang->feedback->priList, $feedback->pri);
        $content[] = "* {$lang->feedback->status}: " . zget($lang->feedback->statusList, $feedback->status);
        $content[] = "* {$lang->feedback->solution}: " . zget($lang->feedback->solutionList, $feedback->solution);
        $content[] = "* {$lang->feedback->product}: $feedback->product";
        $content[] = "* {$lang->feedback->module}: $feedback->module";
        $content[] = "* {$lang->feedback->openedBy}: $feedback->openedBy";
        $content[] = "* {$lang->feedback->openedDate}: $feedback->openedDate";
        $content[] = "* {$lang->feedback->assignedTo}: $feedback->assignedTo";
        $content[] = "* {$lang->feedback->assignedDate}: $feedback->assignedDate";
        $content[] = "* {$lang->feedback->reviewedBy}: $feedback->reviewedBy";
        $content[] = "* {$lang->feedback->reviewedDate}: $feedback->reviewedDate";
        $content[] = "* {$lang->feedback->closedBy}: $feedback->closedBy";
        $content[] = "* {$lang->feedback->closedDate}: $feedback->closedDate";
        $content[] = "* {$lang->feedback->closedReason}: " . zget($lang->feedback->closedReasonList, $feedback->closedReason);
        $content[] = "* {$lang->feedback->processedBy}: $feedback->processedBy";
        $content[] = "* {$lang->feedback->processedDate}: $feedback->processedDate";
        $content[] = "* {$lang->feedback->source}: $feedback->source";
        $content[] = "* {$lang->feedback->result}: $feedback->result";
        $content[] = "* {$lang->feedback->keywords}: $feedback->keywords";
        $content[] = "* {$lang->feedback->faq}: $feedback->faq";

        $content[] = "\n## {$lang->feedback->desc}\n";
        $content[] = strip_tags($feedback->desc) . "\n";

        $markdown['content'] = implode("\n", $content);

        $markdown['attrs'] = array('objectTitle' => $markdown['title'], 'product' => $feedback->product, 'module' => $feedback->module, 'type' => $feedbackType, 'status' => $feedback->status, 'pri' => $feedback->pri);
        return $markdown;
    }

    /**
     * 将 ISSUE 对象转换为 Markdown。
     * Convert issue object to Markdown format.
     *
     * @access public
     * @param  object     $issue
     * @param  array      $langData
     * @return array
     */
    public static function convertIssueToMarkdown($issue, $langData = [])
    {
        $issue = static::convertUserFieldToRealname('issue', $issue);

        $id    = $issue->id ?? 0;
        $title = trim((string)($issue->title ?? $issue->name ?? ''));

        $typeName = isset($langData['common']) ? $langData['common'] : '';
        $header   = trim(($typeName !== '' ? "{$typeName} " : '') . "#$id $title");
        if($header === '') $header = "#$id $title";

        $markdown = array('id' => $id, 'title' => $header);
        $content  = array();
        $content[] = "# {$header}\n";

        $sectionBasic = static::getSectionLabel($langData, 'basic');
        if($sectionBasic !== '') $content[] = "## {$sectionBasic}\n";

        $fieldPairs = static::collectFieldPairs('issue', $langData, $issue);
        static::appendFieldList($content, $langData, $fieldPairs);

        static::appendDetailSection($content, $langData, 'desc', $issue->desc ?? null);
        static::appendDetailSection($content, $langData, 'solution', $issue->resolutionComment ?? null);

        $markdown['content'] = implode("\n", $content);
        $markdown['attrs']   = array(
            'objectTitle' => $markdown['title'],
            'status'      => $issue->status     ?? '',
            'pri'         => $issue->pri        ?? '',
            'severity'    => $issue->severity   ?? '',
            'project'     => $issue->project    ?? '',
            'execution'   => $issue->execution  ?? '',
            'assignedTo'  => $issue->assignedTo ?? '',
            'resolution'  => $issue->resolution ?? '',
            'issueType'   => $issue->issueType  ?? ($issue->type ?? ''),
        );

        return $markdown;
    }

    /**
     * 将 RISK 对象转换为 Markdown。
     * Convert risk object to Markdown format.
     *
     * @access public
     * @param  object     $risk
     * @param  array      $langData
     * @return array
     */
    public static function convertRiskToMarkdown($risk, $langData = [])
    {
        $risk = static::convertUserFieldToRealname('risk', $risk);

        $id    = $risk->id ?? 0;
        $title = trim((string)($risk->name ?? ''));

        $typeName = isset($langData['common']) ? $langData['common'] : '';
        $header   = trim(($typeName !== '' ? "{$typeName} " : '') . "#$id $title");
        if($header === '') $header = "#$id $title";

        $markdown = array('id' => $id, 'title' => $header);
        $content  = array();
        $content[] = "# {$header}\n";

        $sectionBasic = static::getSectionLabel($langData, 'basic');
        if($sectionBasic !== '') $content[] = "## {$sectionBasic}\n";

        $fieldPairs = static::collectFieldPairs('risk', $langData, $risk);
        static::appendFieldList($content, $langData, $fieldPairs);

        static::appendDetailSection($content, $langData, 'desc', $risk->desc ?? null);
        static::appendDetailSection($content, $langData, 'prevention', $risk->prevention ?? null);
        static::appendDetailSection($content, $langData, 'remedy', $risk->remedy ?? null);

        $markdown['content'] = implode("\n", $content);
        $markdown['attrs']   = array(
            'objectTitle' => $markdown['title'],
            'status'      => $risk->status      ?? '',
            'probability' => $risk->probability ?? ($risk->chance ?? ''),
            'impact'      => $risk->impact      ?? '',
            'strategy'    => $risk->strategy    ?? '',
            'assignedTo'  => $risk->assignedTo  ?? '',
            'project'     => $risk->project     ?? '',
            'execution'   => $risk->execution   ?? '',
        );

        return $markdown;
    }

    /**
     * 将 OPPORTUNITY 对象转换为 Markdown。
     * Convert opportunity object to Markdown format.
     *
     * @access public
     * @param  object     $opportunity
     * @param  array      $langData
     * @return array
     */
    public static function convertOpportunityToMarkdown($opportunity, $langData = [])
    {
        $opportunity = static::convertUserFieldToRealname('opportunity', $opportunity);

        $id    = $opportunity->id ?? 0;
        $title = trim((string)($opportunity->name ?? ''));

        $typeName = isset($langData['common']) ? $langData['common'] : '';
        $header   = trim(($typeName !== '' ? "{$typeName} " : '') . "#$id $title");
        if($header === '') $header = "#$id $title";

        $markdown = array('id' => $id, 'title' => $header);
        $content  = array();
        $content[] = "# {$header}\n";

        $sectionBasic = static::getSectionLabel($langData, 'basic');
        if($sectionBasic !== '') $content[] = "## {$sectionBasic}\n";

        $fieldPairs = static::collectFieldPairs('opportunity', $langData, $opportunity);
        static::appendFieldList($content, $langData, $fieldPairs);

        static::appendDetailSection($content, $langData, 'desc', $opportunity->desc ?? null);
        static::appendDetailSection($content, $langData, 'prevention', $opportunity->prevention ?? null);

        $markdown['content'] = implode("\n", $content);
        $markdown['attrs']   = array(
            'objectTitle' => $markdown['title'],
            'status'     => $opportunity->status     ?? '',
            'benefit'    => $opportunity->benefit    ?? ($opportunity->impact ?? ''),
            'chance'     => $opportunity->chance     ?? '',
            'type'       => $opportunity->type       ?? '',
            'strategy'   => $opportunity->strategy   ?? '',
            'assignedTo' => $opportunity->assignedTo ?? '',
            'project'    => $opportunity->project    ?? '',
        );

        return $markdown;
    }

    /**
     * 将 PLAN 对象转换为 Markdown。
     * Convert plan object to Markdown format.
     *
     * @access public
     * @param  object     $plan
     * @param  array      $langData
     * @return array
     */
    public static function convertPlanToMarkdown($plan, $langData = [])
    {
        $plan = static::convertUserFieldToRealname('plan', $plan);

        $id    = $plan->id ?? 0;
        $title = trim((string)($plan->title ?? $plan->name ?? ''));

        $typeName = isset($langData['common']) ? $langData['common'] : '';
        $header   = trim(($typeName !== '' ? "{$typeName} " : '') . "#$id $title");
        if($header === '') $header = "#$id $title";

        $markdown = array('id' => $id, 'title' => $header);
        $content  = array();
        $content[] = "# {$header}\n";

        $sectionBasic = static::getSectionLabel($langData, 'basic');
        if($sectionBasic !== '') $content[] = "## {$sectionBasic}\n";

        $fieldPairs = static::collectFieldPairs('plan', $langData, $plan);
        static::appendFieldList($content, $langData, $fieldPairs);

        static::appendDetailSection($content, $langData, 'desc', $plan->desc ?? null);
        static::appendMilestoneSection($content, $langData, $plan->milestones ?? null);

        $markdown['content'] = implode("\n", $content);
        $markdown['attrs']   = array(
            'objectTitle' => $markdown['title'],
            'status'      => $plan->status  ?? '',
            'product'     => $plan->product ?? '',
            'project'     => $plan->project ?? '',
            'begin'       => $plan->begin   ?? ($plan->start ?? ''),
            'end'         => $plan->end     ?? '',
            'owner'       => $plan->owner   ?? ($plan->assignedTo ?? ''),
        );

        return $markdown;
    }

    /**
     * 将 RELEASE 对象转换为 Markdown。
     * Convert release object to Markdown format.
     *
     * @access public
     * @param  object     $release
     * @param  array      $langData
     * @return array
     */
    public static function convertReleaseToMarkdown($release, $langData = [])
    {
        $release = static::convertUserFieldToRealname('release', $release);

        $id    = $release->id ?? 0;
        $title = trim((string)($release->name ?? ''));

        $typeName = isset($langData['common']) ? $langData['common'] : '';
        $header   = trim(($typeName !== '' ? "{$typeName} " : '') . "#$id $title");
        if($header === '') $header = "#$id $title";

        $markdown = array('id' => $id, 'title' => $header);
        $content  = array();
        $content[] = "# {$header}\n";

        $sectionBasic = static::getSectionLabel($langData, 'basic');
        if($sectionBasic !== '') $content[] = "## {$sectionBasic}\n";

        $fieldPairs = static::collectFieldPairs('release', $langData, $release);
        static::appendFieldList($content, $langData, $fieldPairs);

        static::appendDetailSection($content, $langData, 'desc', $release->desc ?? null);

        $markdown['content'] = implode("\n", $content);
        $markdown['attrs']   = array(
            'objectTitle' => $markdown['title'],
            'system'      => $release->system  ?? '',
            'project'     => $release->project ?? '',
            'build'       => $release->build   ?? '',
            'status'      => $release->status  ?? '',
        );

        return $markdown;
    }

    /**
     * 将 TICKET 对象转换为 Markdown。
     * Convert ticket object to Markdown format.
     *
     * @access public
     * @param  object     $ticket
     * @param  array      $langData
     * @return array
     */
    public static function convertTicketToMarkdown($ticket, $langData = [])
    {
        $ticket = static::convertUserFieldToRealname('ticket', $ticket);

        $id    = $ticket->id ?? 0;
        $title = trim((string)($ticket->title ?? $ticket->name ?? ''));

        $typeName = isset($langData['common']) ? $langData['common'] : '';
        $header   = trim(($typeName !== '' ? "{$typeName} " : '') . "#$id $title");
        if($header === '') $header = "#$id $title";

        $markdown = array('id' => $id, 'title' => $header);
        $content  = array();
        $content[] = "# {$header}\n";

        $sectionBasic = static::getSectionLabel($langData, 'basic');
        if($sectionBasic !== '') $content[] = "## {$sectionBasic}\n";

        $fieldPairs = static::collectFieldPairs('ticket', $langData, $ticket);
        static::appendFieldList($content, $langData, $fieldPairs);

        static::appendDetailSection($content, $langData, 'desc', $ticket->desc ?? null);
        static::appendDetailSection($content, $langData, 'resolution', $ticket->resolution ?? null);
        static::appendDetailSection($content, $langData, 'history', $ticket->history ?? null);

        $ticketType = $ticket->ticketType ?? $ticket->type ?? '';

        $markdown['content'] = implode("\n", $content);
        $markdown['attrs']   = array(
            'objectTitle' => $markdown['title'],
            'status'      => $ticket->status     ?? '',
            'type'        => $ticketType,
            'pri'         => $ticket->pri        ?? '',
            'assignedTo'  => $ticket->assignedTo ?? '',
            'product'     => $ticket->product    ?? '',
            'project'     => $ticket->project    ?? '',
            'customer'    => $ticket->customer   ?? '',
        );

        return $markdown;
    }
}