Initial commit: dating app backend (Go/Gin/GORM/Postgres)

Phone+OTP auth, staged onboarding, admin approval workflow, and a full discovery/swipe/match/chat system with photo upload and approximate distance (haversine) based on user location. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-09-15 23:23:47 +03:30
commit 2823fb45f5
49 changed files with 4582 additions and 0 deletions
@@ -0,0 +1,126 @@
+package service
+
+import (
+	"errors"
+	"time"
+
+	"dating-app/internal/dto"
+	"dating-app/internal/models"
+	"dating-app/internal/repository"
+)
+
+var ErrNotMatchMember = errors.New("این گفتگو مال تو نیست")
+
+type ChatService struct {
+	matchRepo   *repository.MatchRepository
+	messageRepo *repository.MessageRepository
+	userRepo    *repository.UserRepository
+	photoRepo   *repository.PhotoRepository
+}
+
+func NewChatService(
+	matchRepo *repository.MatchRepository,
+	messageRepo *repository.MessageRepository,
+	userRepo *repository.UserRepository,
+	photoRepo *repository.PhotoRepository,
+) *ChatService {
+	return &ChatService{
+		matchRepo:   matchRepo,
+		messageRepo: messageRepo,
+		userRepo:    userRepo,
+		photoRepo:   photoRepo,
+	}
+}
+
+// ListMatches همه‌ی مچ‌های کاربر رو همراه با اطلاعات طرف مقابل و آخرین پیام برمی‌گردونه
+func (s *ChatService) ListMatches(userID uint) ([]dto.MatchView, error) {
+	matches, err := s.matchRepo.ListByUser(userID)
+	if err != nil {
+		return nil, err
+	}
+
+	views := make([]dto.MatchView, 0, len(matches))
+	for _, m := range matches {
+		otherID := repository.OtherUserID(&m, userID)
+		other, err := s.userRepo.FindByID(otherID)
+		if err != nil {
+			continue
+		}
+		photos, _ := s.photoRepo.ListByUser(otherID)
+		urls := make([]string, len(photos))
+		for i, p := range photos {
+			urls[i] = p.URL
+		}
+
+		view := dto.MatchView{
+			ID:        m.ID,
+			UserID:    other.ID,
+			FirstName: other.FirstName,
+			Photos:    urls,
+			CreatedAt: m.CreatedAt.Format(time.RFC3339),
+		}
+		if last, err := s.messageRepo.LastMessage(m.ID); err == nil {
+			text := last.Text
+			at := last.CreatedAt.Format(time.RFC3339)
+			view.LastMessage = &text
+			view.LastAt = &at
+		}
+		views = append(views, view)
+	}
+	return views, nil
+}
+
+func (s *ChatService) getAuthorizedMatch(userID, matchID uint) (uint, error) {
+	match, err := s.matchRepo.FindByID(matchID)
+	if err != nil {
+		return 0, err
+	}
+	if !repository.IsMember(match, userID) {
+		return 0, ErrNotMatchMember
+	}
+	return match.ID, nil
+}
+
+// ListMessages پیام‌های یک مچ رو برمی‌گردونه؛ فقط اگه کاربر عضو اون مچ باشه.
+func (s *ChatService) ListMessages(userID, matchID uint) ([]dto.MessageView, error) {
+	if _, err := s.getAuthorizedMatch(userID, matchID); err != nil {
+		return nil, err
+	}
+	messages, err := s.messageRepo.ListByMatch(matchID)
+	if err != nil {
+		return nil, err
+	}
+	views := make([]dto.MessageView, 0, len(messages))
+	for _, m := range messages {
+		views = append(views, dto.MessageView{
+			ID:        m.ID,
+			MatchID:   m.MatchID,
+			SenderID:  m.SenderID,
+			Text:      m.Text,
+			CreatedAt: m.CreatedAt.Format(time.RFC3339),
+			IsMine:    m.SenderID == userID,
+		})
+	}
+	return views, nil
+}
+
+// SendMessage یک پیام جدید توی یک مچ ثبت می‌کنه؛ فقط اگه کاربر عضو اون مچ باشه.
+func (s *ChatService) SendMessage(userID, matchID uint, text string) (*dto.MessageView, error) {
+	if _, err := s.getAuthorizedMatch(userID, matchID); err != nil {
+		return nil, err
+	}
+
+	msg := &models.Message{MatchID: matchID, SenderID: userID, Text: text}
+	if err := s.messageRepo.Create(msg); err != nil {
+		return nil, err
+	}
+
+	return &dto.MessageView{
+		ID:        msg.ID,
+		MatchID:   msg.MatchID,
+		SenderID:  msg.SenderID,
+		Text:      msg.Text,
+		CreatedAt: msg.CreatedAt.Format(time.RFC3339),
+		IsMine:    true,
+	}, nil
+}