399 lines
11 KiB
PHP
399 lines
11 KiB
PHP
<?php
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namespace App\Models;
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use Illuminate\Database\Eloquent\Factories\HasFactory;
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use Illuminate\Database\Eloquent\Model;
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use Illuminate\Database\Eloquent\Relations\BelongsTo;
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class AIMessage extends Model
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{
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use HasFactory;
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protected $fillable = [
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'conversation_id',
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'role',
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'content',
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'tokens',
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'metadata',
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];
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protected $casts = [
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'tokens' => 'integer',
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'metadata' => 'array',
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'created_at' => 'datetime',
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];
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/**
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* 关联对话
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*/
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public function conversation(): BelongsTo
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{
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return $this->belongsTo(AIConversation::class);
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}
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/**
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* 获取消息摘要
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*/
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public function getSummaryAttribute(): string
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{
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$content = $this->content;
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if (strlen($content) <= 100) {
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return $content;
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}
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return substr($content, 0, 100) . '...';
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}
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/**
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* 获取消息类型
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*/
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public function getTypeAttribute(): string
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{
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$types = [
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'system' => '系统',
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'user' => '用户',
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'assistant' => 'AI助手',
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];
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return $types[$this->role] ?? '未知';
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}
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/**
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* 获取消息图标
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*/
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public function getIconAttribute(): string
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{
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$icons = [
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'system' => 'settings',
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'user' => 'person',
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'assistant' => 'smart_toy',
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];
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return $icons[$this->role] ?? 'chat';
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}
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/**
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* 获取消息颜色
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*/
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public function getColorAttribute(): string
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{
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$colors = [
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'system' => 'secondary',
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'user' => 'primary',
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'assistant' => 'success',
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];
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return $colors[$this->role] ?? 'default';
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}
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/**
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* 检查是否为AI消息
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*/
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public function getIsAiAttribute(): bool
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{
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return $this->role === 'assistant';
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}
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/**
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* 检查是否为用户消息
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*/
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public function getIsUserAttribute(): bool
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{
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return $this->role === 'user';
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}
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/**
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* 检查是否为系统消息
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*/
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public function getIsSystemAttribute(): bool
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{
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return $this->role === 'system';
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}
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/**
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* 获取消息时间格式
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*/
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public function getTimeFormattedAttribute(): string
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{
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$now = now();
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$messageTime = $this->created_at;
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if ($messageTime->isToday()) {
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return $messageTime->format('H:i');
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} elseif ($messageTime->isYesterday()) {
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return '昨天 ' . $messageTime->format('H:i');
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} elseif ($messageTime->diffInDays($now) < 7) {
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return $messageTime->format('m-d H:i');
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} else {
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return $messageTime->format('Y-m-d H:i');
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}
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}
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/**
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* 获取消息相对时间
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*/
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public function getRelativeTimeAttribute(): string
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{
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$diff = $this->created_at->diff(now());
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if ($diff->y > 0) {
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return $diff->y . '年前';
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} elseif ($diff->m > 0) {
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return $diff->m . '个月前';
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} elseif ($diff->d > 0) {
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return $diff->d . '天前';
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} elseif ($diff->h > 0) {
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return $diff->h . '小时前';
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} elseif ($diff->i > 0) {
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return $diff->i . '分钟前';
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} else {
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return '刚刚';
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}
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}
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/**
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* 获取消息内容格式（HTML安全）
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*/
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public function getContentFormattedAttribute(): string
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{
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$content = htmlspecialchars($this->content, ENT_QUOTES, 'UTF-8');
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// 将换行转换为<br>
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$content = nl2br($content);
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// 将URL转换为链接
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$content = preg_replace(
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'/(https?:\/\/[^\s]+)/',
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'<a href="$1" target="_blank" rel="noopener noreferrer">$1</a>',
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$content
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);
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// 将代码块格式化
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$content = preg_replace_callback(
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'/```(\w+)?\n([\s\S]*?)```/',
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function ($matches) {
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$language = $matches[1] ?? '';
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$code = htmlspecialchars($matches[2], ENT_QUOTES, 'UTF-8');
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return '<pre><code class="language-' . $language . '">' . $code . '</code></pre>';
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},
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$content
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);
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// 将行内代码格式化
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$content = preg_replace(
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'/`([^`]+)`/',
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'<code>$1</code>',
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$content
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);
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return $content;
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}
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/**
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* 获取消息中的代码块
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*/
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public function getCodeBlocksAttribute(): array
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{
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preg_match_all('/```(\w+)?\n([\s\S]*?)```/', $this->content, $matches, PREG_SET_ORDER);
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$codeBlocks = [];
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foreach ($matches as $match) {
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$codeBlocks[] = [
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'language' => $match[1] ?? '',
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'code' => $match[2],
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];
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}
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return $codeBlocks;
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}
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/**
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* 获取消息中的链接
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*/
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public function getLinksAttribute(): array
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{
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preg_match_all('/https?:\/\/[^\s]+/', $this->content, $matches);
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return $matches[0] ?? [];
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}
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/**
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* 获取消息中的关键词
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*/
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public function getKeywordsAttribute(): array
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{
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// 简单关键词提取
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$content = strtolower($this->content);
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$words = preg_split('/\s+/', $content);
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$wordCount = array_count_values($words);
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arsort($wordCount);
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// 过滤常见词
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$commonWords = ['the', 'and', 'you', 'for', 'are', 'this', 'that', 'with', 'have', 'from'];
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$keywords = array_diff(array_keys($wordCount), $commonWords);
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return array_slice($keywords, 0, 10);
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}
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/**
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* 获取消息情感分析（简单版）
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*/
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public function getSentimentAttribute(): string
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{
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$positiveWords = ['好', '优秀', '成功', '满意', '高兴', '喜欢', '感谢', '完美', '棒', '赞'];
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$negativeWords = ['差', '失败', '不满意', '生气', '讨厌', '问题', '错误', '糟糕', '慢', '贵'];
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$content = $this->content;
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$positiveCount = 0;
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$negativeCount = 0;
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foreach ($positiveWords as $word) {
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$positiveCount += substr_count($content, $word);
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}
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foreach ($negativeWords as $word) {
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$negativeCount += substr_count($content, $word);
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}
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if ($positiveCount > $negativeCount) {
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return 'positive';
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} elseif ($negativeCount > $positiveCount) {
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return 'negative';
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} else {
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return 'neutral';
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}
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}
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/**
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* 获取消息长度等级
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*/
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public function getLengthLevelAttribute(): string
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{
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$length = strlen($this->content);
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if ($length < 50) {
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return 'short';
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} elseif ($length < 200) {
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return 'medium';
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} elseif ($length < 500) {
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return 'long';
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} else {
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return 'very-long';
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}
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}
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/**
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* 获取消息复杂度
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*/
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public function getComplexityAttribute(): float
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{
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$content = $this->content;
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// 计算平均句子长度
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$sentences = preg_split('/[。！？.!?]/', $content);
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$sentences = array_filter($sentences, function($sentence) {
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return strlen(trim($sentence)) > 0;
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});
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if (empty($sentences)) {
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return 0;
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}
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$totalWords = 0;
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foreach ($sentences as $sentence) {
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$words = preg_split('/\s+/', $sentence);
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$totalWords += count($words);
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}
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$avgSentenceLength = $totalWords / count($sentences);
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// 计算生词比例（简单版）
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$commonWords = ['的', '了', '在', '是', '和', '与', '或', '等', '这个', '那个'];
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$allWords = preg_split('/\s+/', $content);
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$uniqueWords = array_unique($allWords);
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$uncommonWords = array_diff($uniqueWords, $commonWords);
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$uncommonRatio = count($uncommonWords) / max(1, count($uniqueWords));
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// 综合复杂度
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$complexity = ($avgSentenceLength * 0.6) + ($uncommonRatio * 40);
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return min(100, max(0, $complexity));
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}
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/**
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* 获取对话中的消息统计
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*/
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public static function getConversationStatistics($conversationId)
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{
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$messages = self::where('conversation_id', $conversationId)->get();
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$totalMessages = $messages->count();
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$userMessages = $messages->where('role', 'user')->count();
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$aiMessages = $messages->where('role', 'assistant')->count();
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$totalTokens = $messages->sum('tokens');
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$userTokens = $messages->where('role', 'user')->sum('tokens');
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$aiTokens = $messages->where('role', 'assistant')->sum('tokens');
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$avgTokensPerMessage = $totalMessages > 0 ?
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round($totalTokens / $totalMessages, 1) : 0;
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$avgResponseTime = self::calculateAvgResponseTime($messages);
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return [
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'total_messages' => $totalMessages,
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'user_messages' => $userMessages,
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'ai_messages' => $aiMessages,
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'message_ratio' => $userMessages > 0 ?
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round($aiMessages / $userMessages, 2) : 0,
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'total_tokens' => $totalTokens,
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'user_tokens' => $userTokens,
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'ai_tokens' => $aiTokens,
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'avg_tokens_per_message' => $avgTokensPerMessage,
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'avg_response_time' => $avgResponseTime,
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];
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}
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/**
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* 计算平均响应时间
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*/
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private static function calculateAvgResponseTime($messages)
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{
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$aiMessages = $messages->where('role', 'assistant');
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if ($aiMessages->isEmpty()) {
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return null;
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}
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$totalSeconds = 0;
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$count = 0;
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foreach ($aiMessages as $aiMessage) {
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$previousMessage = $messages
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->where('created_at', '<', $aiMessage->created_at)
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->sortByDesc('created_at')
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->first();
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if ($previousMessage) {
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$diff = $aiMessage->created_at->diffInSeconds($previousMessage->created_at);
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$totalSeconds += $diff;
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$count++;
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}
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}
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if ($count === 0) {
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return null;
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}
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$avgSeconds = $totalSeconds / $count;
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if ($avgSeconds < 60) {
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return round($avgSeconds) . '秒';
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} else {
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return round($avgSeconds / 60, 1) . '分钟';
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}
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}
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} |