feat: 内置微信连接器并完善 Agent 查询能力

services/wechat-connector/messaging/sender.go

@@ -0,0 +1,86 @@
+package messaging
+
+import (
+	"context"
+	"fmt"
+	"log"
+
+	"github.com/Wxw-Gu/WechatExplorer/services/wechat-connector/ilink"
+	"github.com/google/uuid"
+)
+
+// NewClientID generates a new unique client ID for message correlation.
+func NewClientID() string {
+	return uuid.New().String()
+}
+
+// SendTypingState sends a typing indicator to a user via the iLink sendtyping API.
+// It first fetches a typing_ticket via getconfig, then sends the typing status.
+func SendTypingState(ctx context.Context, client *ilink.Client, userID, contextToken string) error {
+	// Get typing ticket
+	configResp, err := client.GetConfig(ctx, userID, contextToken)
+	if err != nil {
+		return fmt.Errorf("get config for typing: %w", err)
+	}
+	if configResp.TypingTicket == "" {
+		return fmt.Errorf("no typing_ticket returned from getconfig")
+	}
+
+	// Send typing
+	if err := client.SendTyping(ctx, userID, configResp.TypingTicket, ilink.TypingStatusTyping); err != nil {
+		return fmt.Errorf("send typing: %w", err)
+	}
+
+	log.Printf("[sender] sent typing indicator to %s", userID)
+	return nil
+}
+
+// SendTextReply sends a text reply to a user through the iLink API.
+// If clientID is empty, a new one is generated.
+func SendTextReply(ctx context.Context, client *ilink.Client, toUserID, text, contextToken, clientID string) error {
+	if clientID == "" {
+		clientID = NewClientID()
+	}
+
+	// Convert markdown to plain text for WeChat display
+	plainText := MarkdownToPlainText(text)
+
+	req := &ilink.SendMessageRequest{
+		Msg: ilink.SendMsg{
+			FromUserID:   client.BotID(),
+			ToUserID:     toUserID,
+			ClientID:     clientID,
+			MessageType:  ilink.MessageTypeBot,
+			MessageState: ilink.MessageStateFinish,
+			ItemList: []ilink.MessageItem{
+				{
+					Type: ilink.ItemTypeText,
+					TextItem: &ilink.TextItem{
+						Text: plainText,
+					},
+				},
+			},
+			ContextToken: contextToken,
+		},
+		BaseInfo: ilink.BaseInfo{},
+	}
+
+	resp, err := client.SendMessage(ctx, req)
+	if err != nil {
+		return fmt.Errorf("send message: %w", err)
+	}
+
+	if resp.Ret != 0 {
+		return fmt.Errorf("send message failed: ret=%d errmsg=%s", resp.Ret, resp.ErrMsg)
+	}
+
+	log.Printf("[sender] sent reply to %s: %q", toUserID, truncate(text, 50))
+	return nil
+}
+
+func truncate(s string, n int) string {
+	if len(s) <= n {
+		return s
+	}
+	return s[:n] + "..."
+}