feat: migrate playback module to modular domain pattern

internal/playback/handler/handler.go

@@ -0,0 +1,63 @@
+package handler
+
+import (
+	"mal/internal/domain"
+	"mal/internal/server"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+)
+
+type PlaybackHandler struct {
+	svc domain.PlaybackService
+}
+
+func NewPlaybackHandler(svc domain.PlaybackService) *PlaybackHandler {
+	return &PlaybackHandler{svc: svc}
+}
+
+func (h *PlaybackHandler) Register(r *gin.Engine) {
+	r.GET("/watch/:id", h.HandleWatchPage)
+	r.POST("/api/watch-progress", h.HandleSaveProgress)
+}
+
+func (h *PlaybackHandler) HandleWatchPage(c *gin.Context) {
+	id, _ := strconv.Atoi(c.Param("id"))
+	ep := c.DefaultQuery("ep", "1")
+	mode := c.DefaultQuery("mode", "sub")
+
+	userID := "" // TODO: get from auth context
+	data, err := h.svc.BuildWatchData(c.Request.Context(), id, []string{}, ep, mode, userID)
+	if err != nil {
+		c.Status(http.StatusNotFound)
+		return
+	}
+
+	c.HTML(http.StatusOK, "watch.gohtml", gin.H{
+		"WatchData":   data,
+		"CurrentPath": c.Request.URL.Path,
+	})
+}
+
+func (h *PlaybackHandler) HandleSaveProgress(c *gin.Context) {
+	userID := "" // TODO: get from auth context
+	var req struct {
+		MalID       int64   `json:"mal_id"`
+		Episode     int     `json:"episode"`
+		TimeSeconds float64 `json:"time_seconds"`
+	}
+
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.Status(http.StatusBadRequest)
+		return
+	}
+
+	err := h.svc.SaveProgress(c.Request.Context(), userID, req.MalID, req.Episode, req.TimeSeconds)
+	if err != nil {
+		c.Status(http.StatusInternalServerError)
+		return
+	}
+
+	c.Status(http.StatusOK)
+}