update at 2025-10-16 12:45:05

web/src/services/chat/ConversationService.ts

@@ -0,0 +1,140 @@
+/**
+ * ConversationService
+ * 负责对话的管理
+ * 
+ * 职责：
+ * - 对话的创建、读取、删除
+ * - 对话与话题的关联
+ * - 对话元数据管理
+ */
+
+import type { Conversation } from '../../types/chat'
+
+export interface CreateConversationOptions {
+  topicId: string
+  model?: string
+  temperature?: number
+  maxTokens?: number
+  systemPrompt?: string
+}
+
+export class ConversationService {
+  private conversations: Map<string, Conversation>
+
+  constructor(conversations: Map<string, Conversation>) {
+    this.conversations = conversations
+  }
+
+  /**
+   * 创建新对话
+   */
+  createConversation(options: CreateConversationOptions): Conversation {
+    const conversation: Conversation = {
+      id: this.generateId(),
+      topicId: options.topicId,
+      messages: [],
+      createdAt: new Date(),
+      updatedAt: new Date(),
+      metadata: {
+        model: options.model,
+        temperature: options.temperature,
+        maxTokens: options.maxTokens,
+        systemPrompt: options.systemPrompt
+      }
+    }
+
+    this.conversations.set(conversation.id, conversation)
+    return conversation
+  }
+
+  /**
+   * 获取对话
+   */
+  getConversation(conversationId: string): Conversation | undefined {
+    return this.conversations.get(conversationId)
+  }
+
+  /**
+   * 根据 topicId 获取对话
+   */
+  getConversationByTopicId(topicId: string): Conversation | undefined {
+    for (const conv of this.conversations.values()) {
+      if (conv.topicId === topicId) {
+        return conv
+      }
+    }
+    return undefined
+  }
+
+  /**
+   * 获取所有对话
+   */
+  getAllConversations(): Conversation[] {
+    return Array.from(this.conversations.values())
+  }
+
+  /**
+   * 删除对话
+   */
+  deleteConversation(conversationId: string): boolean {
+    return this.conversations.delete(conversationId)
+  }
+
+  /**
+   * 删除话题对应的对话
+   */
+  deleteConversationByTopicId(topicId: string): boolean {
+    for (const [id, conv] of this.conversations.entries()) {
+      if (conv.topicId === topicId) {
+        this.conversations.delete(id)
+        return true
+      }
+    }
+    return false
+  }
+
+  /**
+   * 更新对话元数据
+   */
+  updateMetadata(
+    conversationId: string,
+    metadata: Partial<Conversation['metadata']>
+  ): boolean {
+    const conversation = this.conversations.get(conversationId)
+    if (!conversation) return false
+
+    conversation.metadata = {
+      ...conversation.metadata,
+      ...metadata
+    }
+    conversation.updatedAt = new Date()
+    return true
+  }
+
+  /**
+   * 清空对话消息
+   */
+  clearMessages(conversationId: string): boolean {
+    const conversation = this.conversations.get(conversationId)
+    if (!conversation) return false
+
+    conversation.messages = []
+    conversation.updatedAt = new Date()
+    return true
+  }
+
+  /**
+   * 获取对话消息数量
+   */
+  getMessageCount(conversationId: string): number {
+    const conversation = this.conversations.get(conversationId)
+    return conversation?.messages.length || 0
+  }
+
+  /**
+   * 生成唯一 ID
+   */
+  private generateId(): string {
+    return `${Date.now()}_${Math.random().toString(36).substr(2, 9)}`
+  }
+}