修改自动推广的相关任务
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wangjinlei
176
application/common/PromotionLlmService.php
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176
application/common/PromotionLlmService.php
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<?php
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namespace app\common;
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use think\Env;
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/**
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* 推广邮件 LLM 服务
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*
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* 作用：基于 expert 的代表作 (paper_title) + 期刊信息 (name / scope 等)，
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* 生成一段 2-3 句的个性化描述，用于邮件模板变量 {{llm_description}}。
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*
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* 配置（.env 的 [promotion] 段）：
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* PROMOTION_LLM_URL chat/completions 接口地址
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* PROMOTION_LLM_MODEL 模型名
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* PROMOTION_LLM_TIMEOUT 超时时间(秒)，默认 30
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* PROMOTION_LLM_FALLBACK 兜底描述（LLM 不可用 / 调用失败时使用）
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*
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* 返回约定：
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* ['status' => 1|2|3, 'text' => string]
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* 1 = LLM 成功生成
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* 2 = LLM 调用失败，text = 兜底文案
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* 3 = 跳过（缺少代表作等前置条件），text = 兜底文案
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*/
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class PromotionLlmService
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{
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private $url;
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private $model;
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private $timeout;
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private $apiKey;
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private $fallback;
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public function __construct()
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{
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$this->url = trim((string)Env::get('promotion.promotion_llm_url', ''));
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$this->model = trim((string)Env::get('promotion.promotion_llm_model', ''));
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$this->timeout = max(5, intval(Env::get('promotion.promotion_llm_timeout', 30)));
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$this->apiKey = trim((string)Env::get('promotion.promotion_llm_api_key', ''));
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$this->fallback = trim((string)Env::get('promotion.promotion_llm_fallback',
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'Your recent work aligns closely with the scope of our journal, and we would be honored to consider a contribution from you.'));
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}
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/**
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* 生成个性化描述
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*
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* @param array $expert 至少包含 name / representative_work_title / fields / affiliation
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* @param array $journal 至少包含 title (name) / aims (可选) / databases (可选)
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* @return array ['status' => 1|2|3, 'text' => string]
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*/
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public function generateDescription(array $expert, array $journal): array
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{
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$paperTitle = trim((string)($expert['representative_work_title'] ?? ''));
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$expertName = trim((string)($expert['name'] ?? ''));
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$journalName = trim((string)($journal['title'] ?? ''));
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if ($paperTitle === '' || $journalName === '') {
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return ['status' => 3, 'text' => $this->fallback];
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}
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if ($this->url === '' || $this->model === '') {
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return ['status' => 2, 'text' => $this->fallback];
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}
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$expertField = trim((string)($expert['fields'] ?? ($expert['field'] ?? '')));
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$journalAims = trim((string)($journal['aims'] ?? ''));
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$journalDbs = trim((string)($journal['databases'] ?? ''));
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$system = 'You are an academic editorial assistant. '
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. 'Write a short, warm, professional English paragraph (2-3 sentences, <=50 words) '
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. 'that: (1) briefly appreciates the author\'s recent paper, '
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. '(2) explains why it fits the journal\'s scope, '
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. '(3) gently invites a future submission. '
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. 'Do NOT use placeholders, do NOT add greetings, do NOT add signatures, '
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. 'output plain text only (no markdown).';
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$userLines = [];
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$userLines[] = 'Author name: ' . ($expertName !== '' ? $expertName : '(unknown)');
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if ($expertField !== '') {
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$userLines[] = 'Author research field: ' . $expertField;
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}
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$userLines[] = 'Recent paper title: ' . $paperTitle;
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$userLines[] = 'Target journal: ' . $journalName;
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if ($journalAims !== '') {
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$userLines[] = 'Journal aims & scope: ' . mb_substr($journalAims, 0, 500);
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}
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if ($journalDbs !== '') {
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$userLines[] = 'Journal indexing: ' . mb_substr($journalDbs, 0, 200);
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}
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$userLines[] = 'Return only the paragraph, nothing else.';
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$user = implode("\n", $userLines);
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$payload = [
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'model' => $this->model,
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'temperature' => 0.4,
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'messages' => [
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['role' => 'system', 'content' => $system],
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['role' => 'user', 'content' => $user],
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],
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];
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$content = $this->postChat($payload);
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if ($content === null) {
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return ['status' => 2, 'text' => $this->fallback];
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}
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$content = $this->cleanContent($content);
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if ($content === '') {
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return ['status' => 2, 'text' => $this->fallback];
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}
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return ['status' => 1, 'text' => $content];
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}
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/**
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* 调用 chat/completions 接口，返回 content 字符串；失败返回 null。
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*/
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private function postChat(array $payload)
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{
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL, $this->url);
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curl_setopt($ch, CURLOPT_POST, true);
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curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($payload, JSON_UNESCAPED_UNICODE));
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, min(10, $this->timeout));
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curl_setopt($ch, CURLOPT_TIMEOUT, $this->timeout);
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$headers = ['Content-Type: application/json'];
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if ($this->apiKey !== '') {
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$headers[] = 'Authorization: Bearer ' . $this->apiKey;
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}
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curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
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$raw = curl_exec($ch);
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if ($raw === false) {
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curl_close($ch);
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return null;
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}
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$httpCode = intval(curl_getinfo($ch, CURLINFO_HTTP_CODE));
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curl_close($ch);
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if ($httpCode < 200 || $httpCode >= 300) {
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return null;
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}
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$data = json_decode($raw, true);
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if (!is_array($data)) return null;
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if (isset($data['choices'][0]['message']['content'])) {
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return (string)$data['choices'][0]['message']['content'];
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}
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if (isset($data['content'])) {
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return (string)$data['content'];
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}
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return null;
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}
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/**
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* 清洗 LLM 输出：去除 markdown 包裹、多余空白、首尾引号、过长截断。
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*/
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private function cleanContent(string $text): string
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{
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$text = trim($text);
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$text = preg_replace('/^```[a-zA-Z]*\s*|```$/m', '', $text);
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$text = trim($text);
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$text = trim($text, "\"' \t\n\r\0\x0B");
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$text = preg_replace('/\s+/', ' ', $text);
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if (mb_strlen($text) > 800) {
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$text = mb_substr($text, 0, 800);
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}
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return trim($text);
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}
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public function getFallback(): string
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{
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return $this->fallback;
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}
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}
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