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>

internal/repository/swipe_repository.go

@@ -0,0 +1,42 @@
+package repository
+
+import (
+	"errors"
+
+	"gorm.io/gorm"
+
+	"dating-app/internal/models"
+)
+
+type SwipeRepository struct {
+	db *gorm.DB
+}
+
+func NewSwipeRepository(db *gorm.DB) *SwipeRepository {
+	return &SwipeRepository{db: db}
+}
+
+func (r *SwipeRepository) Create(swipe *models.Swipe) error {
+	return r.db.Create(swipe).Error
+}
+
+// HasLiked یعنی swiperID قبلاً swipedID رو لایک/سوپرلایک کرده
+func (r *SwipeRepository) HasLiked(swiperID, swipedID uint) (bool, error) {
+	var swipe models.Swipe
+	err := r.db.
+		Where("swiper_id = ? AND swiped_id = ? AND action IN ?", swiperID, swipedID, []models.SwipeAction{models.SwipeLike, models.SwipeSuperlike}).
+		First(&swipe).Error
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return false, nil
+	}
+	if err != nil {
+		return false, err
+	}
+	return true, nil
+}
+
+func (r *SwipeRepository) Exists(swiperID, swipedID uint) (bool, error) {
+	var count int64
+	err := r.db.Model(&models.Swipe{}).Where("swiper_id = ? AND swiped_id = ?", swiperID, swipedID).Count(&count).Error
+	return count > 0, err
+}