add dialogs

README.md

@@ -13,11 +13,10 @@ The Model Context Protocol (MCP) is a system that lets AI apps, like Claude Desk
 ## What does this server do?
 
 - [x] Get current user data
-- [ ] Get the list of dialogs (chats, channels, groups)
+- [x] Get the list of dialogs (chats, channels, groups)
 - [ ] Get the list of (unread) messages in the given dialog
 - [ ] Mark chanel as read
 - [ ] Retrieve messages by date and time
-- [ ] Download media files
 - [ ] Get the list of contacts
 - [ ] Draft a message
 

cmd/test/main.go

@@ -39,7 +39,7 @@ func main() {
 	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
 	defer cancel()
 
-	client := tg.New(appID, apiHash, sessionPath).T
+	client := tg.New(appID, apiHash, sessionPath).T()
 
 	if err := client.Run(ctx, func(ctx context.Context) error {
 		self, err := client.Self(ctx)

internal/tg/client.go

@@ -3,18 +3,24 @@ package tg
 import "github.com/gotd/td/telegram"
 
 type Client struct {
-	T *telegram.Client
+	appID       int
+	appHash     string
+	sessionPath string
 }
 
 func New(appID int, appHash, sessionPath string) *Client {
-	client := telegram.NewClient(appID, appHash, telegram.Options{
+	return &Client{
+		appID:       appID,
+		appHash:     appHash,
+		sessionPath: sessionPath,
+	}
+}
+
+func (c *Client) T() *telegram.Client {
+	return telegram.NewClient(c.appID, c.appHash, telegram.Options{
 		SessionStorage: &telegram.FileSessionStorage{
-			Path: sessionPath,
+			Path: c.sessionPath,
 		},
 		NoUpdates: true,
 	})
-
-	return &Client{
-		T: client,
-	}
 }

internal/tg/dialogs.go

@@ -0,0 +1,187 @@
+package tg
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"sort"
+
+	"github.com/gotd/td/tg"
+	mcp "github.com/metoro-io/mcp-golang"
+	"github.com/pkg/errors"
+)
+
+// DialogType represents the type of dialog for filtering
+type DialogType string
+
+const (
+	// DialogTypeAll represents all types of dialogs
+	DialogTypeAll DialogType = ""
+	// DialogTypeUser represents user chats
+	DialogTypeUser DialogType = "user"
+	// DialogTypeChat represents group chats
+	DialogTypeChat DialogType = "chat"
+	// DialogTypeChannel represents channels
+	DialogTypeChannel DialogType = "channel"
+
+	// DefaultDialogsLimit is the default limit for dialogs
+	DefaultDialogsLimit = 100
+)
+
+// DialogsArguments contains parameters for getting dialogs
+type DialogsArguments struct {
+	Type  DialogType `json:"type,omitempty" jsonschema:"description=Filter dialogs by type (user, chat, channel or empty for all),enum=,enum=user,enum=chat,enum=channel"`
+	Limit int        `json:"limit,omitempty" jsonschema:"description=Maximum number of dialogs to return (max: 100),default=100"`
+}
+
+// DialogInfo represents a simplified dialog structure
+type DialogInfo struct {
+	ID            int64  `json:"id"`
+	Type          string `json:"type"`
+	Title         string `json:"title"`
+	UnreadCount   int    `json:"unread_count"`
+	LastMessageID int    `json:"last_message_id"`
+	IsVerified    bool   `json:"is_verified,omitempty"`
+}
+
+// GetDialogs returns a list of dialogs (chats, channels, groups)
+func (c *Client) GetDialogs(args DialogsArguments) (*mcp.ToolResponse, error) {
+	var result []DialogInfo
+
+	if args.Limit <= 0 || args.Limit > DefaultDialogsLimit {
+		args.Limit = DefaultDialogsLimit
+	}
+
+	if args.Type == "" {
+		args.Type = DialogTypeAll
+	}
+
+	client := c.T()
+	if err := client.Run(context.Background(), func(ctx context.Context) error {
+		api := client.API()
+		dialogsClass, err := api.MessagesGetDialogs(ctx, &tg.MessagesGetDialogsRequest{
+			OffsetPeer: &tg.InputPeerEmpty{},
+		})
+		if err != nil {
+			return fmt.Errorf("failed to get dialogs: %w", err)
+		}
+
+		var dialogs *tg.MessagesDialogs
+		switch d := dialogsClass.(type) {
+		case *tg.MessagesDialogs:
+			dialogs = d
+		case *tg.MessagesDialogsSlice:
+			dialogs = &tg.MessagesDialogs{
+				Dialogs:  d.Dialogs,
+				Messages: d.Messages,
+				Chats:    d.Chats,
+				Users:    d.Users,
+			}
+		default:
+			return fmt.Errorf("unexpected dialogs response type")
+		}
+
+		result = make([]DialogInfo, 0, len(dialogs.Dialogs))
+
+		for _, dialog := range dialogs.Dialogs {
+			dialogItem, ok := dialog.(*tg.Dialog)
+			if !ok {
+				continue
+			}
+
+			var info DialogInfo
+			info.UnreadCount = dialogItem.UnreadCount
+			info.LastMessageID = dialogItem.TopMessage
+
+			switch peer := dialogItem.Peer.(type) {
+			case *tg.PeerUser:
+				if args.Type != DialogTypeAll && args.Type != DialogTypeUser {
+					continue
+				}
+
+				for _, userItem := range dialogs.Users {
+					user, ok := userItem.(*tg.User)
+					if !ok || user.ID != peer.UserID {
+						continue
+					}
+
+					info.ID = user.ID
+					info.Type = "user"
+					info.Title = getUserName(user)
+					info.IsVerified = user.Verified
+
+					result = append(result, info)
+					break
+				}
+
+			case *tg.PeerChat:
+				if args.Type != DialogTypeAll && args.Type != DialogTypeChat {
+					continue
+				}
+
+				for _, chatItem := range dialogs.Chats {
+					chat, ok := chatItem.(*tg.Chat)
+					if !ok || chat.ID != peer.ChatID {
+						continue
+					}
+
+					info.ID = chat.ID
+					info.Type = "chat"
+					info.Title = chat.Title
+
+					result = append(result, info)
+					break
+				}
+
+			case *tg.PeerChannel:
+				if args.Type != DialogTypeAll && args.Type != DialogTypeChannel {
+					continue
+				}
+
+				for _, channelItem := range dialogs.Chats {
+					channel, ok := channelItem.(*tg.Channel)
+					if !ok || channel.ID != peer.ChannelID {
+						continue
+					}
+
+					info.ID = channel.ID
+					info.Type = "channel"
+					info.Title = channel.Title
+					info.IsVerified = channel.Verified
+
+					result = append(result, info)
+					break
+				}
+			}
+		}
+
+		return nil
+	}); err != nil {
+		return nil, errors.Wrap(err, "failed to get dialogs")
+	}
+
+	// Convert response to JSON
+	jsonData, err := json.Marshal(result)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to marshal response")
+	}
+
+	sort.Slice(result, func(i, j int) bool {
+		return result[i].LastMessageID > result[j].LastMessageID
+	})
+
+	if len(result) > args.Limit {
+		result = result[:args.Limit]
+	}
+
+	return mcp.NewToolResponse(mcp.NewTextContent(string(jsonData))), nil
+}
+
+// Helper function to get user's name
+func getUserName(user *tg.User) string {
+	name := user.FirstName
+	if user.LastName != "" {
+		name += " " + user.LastName
+	}
+	return name
+}

internal/tg/me.go

@@ -20,8 +20,9 @@ type EmptyArguments struct{}
 func (c *Client) GetMe(_ EmptyArguments) (*mcp.ToolResponse, error) {
 	var toolResponse *mcp.ToolResponse
 
-	if err := c.T.Run(context.Background(), func(ctx context.Context) error {
-		self, err := c.T.Self(ctx)
+	client := c.T()
+	if err := client.Run(context.Background(), func(ctx context.Context) error {
+		self, err := client.Self(ctx)
 		if err != nil {
 			return errors.Wrap(err, "failed to get self info")
 		}

serve.go

@@ -41,6 +41,18 @@ func serve(ctx context.Context, cmd *cli.Command) error {
 
 		log.Info().RawJSON("answer", data).Msg("Check GetMe: OK")
 
+		answer, err = client.GetDialogs(tg.DialogsArguments{})
+		if err != nil {
+			return fmt.Errorf("get dialogs: %w", err)
+		}
+
+		data, err = json.MarshalIndent(answer, "", "  ")
+		if err != nil {
+			return fmt.Errorf("marshal: %w", err)
+		}
+
+		log.Info().RawJSON("answer", data).Msg("Check GetDialogs: OK")
+
 		return nil
 	}
 
@@ -49,6 +61,11 @@ func serve(ctx context.Context, cmd *cli.Command) error {
 		return fmt.Errorf("register tool: %w", err)
 	}
 
+	err = server.RegisterTool("dialogs", "Get list of dialogs (chats, channels, groups)", client.GetDialogs)
+	if err != nil {
+		return fmt.Errorf("register dialogs tool: %w", err)
+	}
+
 	if err := server.Serve(); err != nil {
 		return fmt.Errorf("serve: %w", err)
 	}