feat:前端新增初版知识库管理页面

app/api/dify-chat/chat.ts

@@ -0,0 +1,178 @@
+/**
+ * Dify Chat API 模块
+ *
+ * 提供客户端调用 Dify API 的函数
+ * 用于 Remix loader/action 中调用 Dify API
+ *
+ * @module api/dify/chat
+ */
+
+import { difyFetch } from './client.server';
+
+// ============================================================================
+// Dify Chat API 客户端
+// ============================================================================
+
+/**
+ * Dify Chat API 客户端
+ *
+ * @param jwt - JWT 认证令牌
+ * user 参数由后端自动从 JWT 中提取
+ */
+export const difyClient = {
+    /**
+     * 获取应用参数
+     */
+    async getApplicationParameters(jwt?: string): Promise<any> {
+        const response = await difyFetch('parameters', {
+            method: 'GET',
+        }, jwt);
+        return response.json();
+    },
+
+    /**
+     * 获取会话列表
+     */
+    async getConversations(jwt?: string): Promise<any> {
+        const params = new URLSearchParams({
+            limit: '100',
+            first_id: '',
+        });
+
+        const response = await difyFetch(`conversations?${params}`, {
+            method: 'GET',
+        }, jwt);
+        return response.json();
+    },
+
+    /**
+     * 获取会话消息
+     */
+    async getConversationMessages(conversationId: string, jwt?: string): Promise<any> {
+        const params = new URLSearchParams({
+            conversation_id: conversationId,
+            limit: '20',
+            last_id: '',
+        });
+
+        const response = await difyFetch(`messages?${params}`, {
+            method: 'GET',
+        }, jwt);
+        return response.json();
+    },
+
+    /**
+     * 发送聊天消息
+     *
+     * @param inputs - 输入参数
+     * @param query - 用户问题
+     * @param responseMode - 响应模式 ('streaming' | 'blocking')
+     * @param conversationId - 会话 ID
+     * @param files - 附件文件
+     * @param jwt - JWT 认证令牌
+     * @returns 对于流式响应返回 Response 对象，否则返回 JSON
+     */
+    async createChatMessage(
+        inputs: Record<string, any>,
+        query: string,
+        responseMode: string = 'streaming',
+        conversationId?: string,
+        files?: any[],
+        jwt?: string
+    ): Promise<Response | any> {
+        const body = {
+            inputs,
+            query,
+            response_mode: responseMode,
+            conversation_id: conversationId,
+            files: files || [],
+        };
+        const response = await difyFetch('chat-messages', {
+            method: 'POST',
+            body: JSON.stringify(body),
+        }, jwt);
+
+        // 对于流式响应，直接返回 Response 对象
+        if (responseMode === 'streaming') {
+            return response;
+        }
+
+        console.log('[Dify Chat] 解析 JSON 响应');
+        return response.json();
+    },
+
+    /**
+     * 重命名会话
+     */
+    async renameConversation(
+        conversationId: string,
+        name: string,
+        autoGenerate: boolean = false,
+        jwt?: string
+    ): Promise<any> {
+        const body = {
+            name,
+            auto_generate: autoGenerate,
+        };
+
+        const response = await difyFetch(`conversations/${conversationId}/name`, {
+            method: 'POST',
+            body: JSON.stringify(body),
+        }, jwt);
+        return response.json();
+    },
+
+    /**
+     * 删除会话
+     */
+    async deleteConversation(conversationId: string, jwt?: string): Promise<any> {
+        console.log('[Dify Chat] 删除会话:', conversationId);
+
+        try {
+            const response = await difyFetch(`conversations/${conversationId}`, {
+                method: 'DELETE',
+                body: JSON.stringify({}),
+            }, jwt);
+
+            // 对于 204 No Content 响应，直接返回成功
+            if (response.status === 204) {
+                console.log('[Dify Chat] 删除会话成功:', conversationId);
+                return { result: 'success' };
+            }
+
+            const contentType = response.headers.get('Content-Type');
+
+            if (contentType && contentType.includes('application/json')) {
+                const data = await response.json();
+                return data;
+            }
+
+            const text = await response.text();
+            console.log('[Dify Chat] 删除会话文本响应:', text);
+
+            return { result: 'success' };
+        } catch (error: any) {
+            console.warn('[Dify Chat] 删除会话请求失败，但可能已成功删除:', error.message);
+            return { result: 'success' };
+        }
+    },
+
+    /**
+     * 更新消息反馈
+     */
+    async updateMessageFeedback(
+        messageId: string,
+        rating: 'like' | 'dislike' | null,
+        jwt?: string
+    ): Promise<any> {
+        const body = {
+            rating,
+        };
+
+        const response = await difyFetch(`messages/${messageId}/feedbacks`, {
+            method: 'POST',
+            body: JSON.stringify(body),
+        }, jwt);
+        return response.json();
+    },
+};