feat(api): Add compatibility layer for API v1

internal/api/api.go

@@ -26,8 +26,9 @@ type httpError struct {
 }
 
 type Services struct {
-	PrayerProvider   PrayerProvider
-	LocationProvider LocationProvider
+	PrayerProvider         PrayerProvider
+	LocationProvider       LocationProvider
+	LegacyLocationProvider LegacyLocationProvider
 }
 
 type PrayerProvider interface {
@@ -40,6 +41,11 @@ type LocationProvider interface {
 	SearchLocationsByCoords(ctx context.Context, coords prayer.Coordinates) ([]prayer.Location, error)
 }
 
+type LegacyLocationProvider interface {
+	SearchLocations(ctx context.Context, query string) ([]prayer.LegacyLocation, error)
+	GetLocationByID(ctx context.Context, id int) (prayer.LegacyLocation, error)
+}
+
 func New(services Services) *fiber.App {
 	app := fiber.New(fiber.Config{
 		Immutable:    true,
@@ -192,6 +198,74 @@ func New(services Services) *fiber.App {
 		})
 	})
 
+	app.Get("/api/diyanet/search", func(ctx fiber.Ctx) error {
+		q := strings.TrimSpace(ctx.Query("q"))
+		if q == "" {
+			return fmt.Errorf("missing query parameter q: %w", fiber.ErrBadRequest)
+		}
+
+		locations, err := services.LegacyLocationProvider.SearchLocations(ctx.Context(), q)
+		if err != nil {
+			return fmt.Errorf("failed to search legacy diyanet locations: %w", err)
+		}
+
+		resp := make([]fiber.Map, 0, len(locations))
+		for _, location := range locations {
+			resp = append(resp, fiber.Map{
+				"id":      location.ID,
+				"country": location.Country,
+				"city":    location.City,
+				"region":  location.Region,
+			})
+		}
+
+		ctx.Response().Header.Set(fiber.HeaderCacheControl, "max-age=86400")
+		return ctx.JSON(resp)
+	})
+
+	app.Get("/api/diyanet/prayertimes", func(ctx fiber.Ctx) error {
+		if services.LegacyLocationProvider == nil {
+			return fmt.Errorf("legacy location provider is not configured: %w", fiber.ErrNotFound)
+		}
+
+		locationIDText := strings.TrimSpace(ctx.Query("location_id"))
+		if locationIDText == "" {
+			return fmt.Errorf("missing query parameter location_id: %w", fiber.ErrBadRequest)
+		}
+
+		locationID, err := strconv.Atoi(locationIDText)
+		if err != nil {
+			return fmt.Errorf("failed to parse location_id query parameter: %w", errors.Join(fiber.ErrBadRequest, err))
+		}
+
+		legacyLocation, err := services.LegacyLocationProvider.GetLocationByID(ctx.Context(), locationID)
+		if err != nil {
+			return fmt.Errorf("failed to resolve location by location_id: %w", errors.Join(fiber.ErrNotFound, err))
+		}
+
+		result, err := services.PrayerProvider.GetByCoords(ctx.Context(), prayer.Coordinates{
+			Latitude:  legacyLocation.Latitude,
+			Longitude: legacyLocation.Longitude,
+		})
+		if err != nil {
+			return fmt.Errorf("failed to fetch prayer times for location_id: %w", err)
+		}
+
+		location := result.Location
+		location.ID = legacyLocation.ID
+		if strings.TrimSpace(legacyLocation.Timezone) != "" {
+			location.Timezone = legacyLocation.Timezone
+		}
+
+		mapped, err := mapPrayerTimesForLegacyResponse(result.Times, location)
+		if err != nil {
+			return fmt.Errorf("failed to map legacy prayer times response: %w", err)
+		}
+
+		ctx.Response().Header.Set(fiber.HeaderCacheControl, "max-age=86400")
+		return ctx.JSON(mapped)
+	})
+
 	app.Use("/", static.New("", static.Config{FS: templates.FS()}))
 
 	return app
@@ -293,3 +367,29 @@ func loadTimezone(name string) (*time.Location, error) {
 
 	return loc, nil
 }
+
+func mapPrayerTimesForLegacyResponse(times []prayer.Times, location prayer.Location) ([]fiber.Map, error) {
+	tz := time.UTC
+	if strings.TrimSpace(location.Timezone) != "" {
+		loadedTZ, err := loadTimezone(location.Timezone)
+		if err != nil {
+			return nil, fmt.Errorf("failed to load location timezone: %w", err)
+		}
+		tz = loadedTZ
+	}
+
+	out := make([]fiber.Map, 0, len(times))
+	for _, item := range times {
+		out = append(out, fiber.Map{
+			"date":    item.Date.In(tz).Format(time.RFC3339),
+			"fajr":    formatHHMM(item.Fajr, tz),
+			"sun":     formatHHMM(item.Sunrise, tz),
+			"dhuhr":   formatHHMM(item.Dhuhr, tz),
+			"asr":     formatHHMM(item.Asr, tz),
+			"maghrib": formatHHMM(item.Maghrib, tz),
+			"isha":    formatHHMM(item.Isha, tz),
+		})
+	}
+
+	return out, nil
+}