[feature/backend] add categories param in posts

backend/internal/handler/handler.go

@@ -186,10 +186,12 @@ func (h *Handler) ListPosts(c *gin.Context) {
 		langCode = "en" // Default to English
 	}
 
-	var categoryID *int
-	if catIDStr := c.Query("category_id"); catIDStr != "" {
-		if id, err := strconv.Atoi(catIDStr); err == nil {
-			categoryID = &id
+	var categoryIDs []int
+	if catIDsStr := c.QueryArray("category_ids"); len(catIDsStr) > 0 {
+		for _, idStr := range catIDsStr {
+			if id, err := strconv.Atoi(idStr); err == nil {
+				categoryIDs = append(categoryIDs, id)
+			}
 		}
 	}
 
@@ -207,7 +209,7 @@ func (h *Handler) ListPosts(c *gin.Context) {
 		}
 	}
 
-	posts, err := h.service.ListPosts(c.Request.Context(), langCode, categoryID, limit, offset)
+	posts, err := h.service.ListPosts(c.Request.Context(), langCode, categoryIDs, limit, offset)
 	if err != nil {
 		log.Error().Err(err).Msg("Failed to list posts")
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to list posts"})
@@ -256,7 +258,22 @@ func (h *Handler) GetPost(c *gin.Context) {
 }
 
 func (h *Handler) CreatePost(c *gin.Context) {
-	post, err := h.service.CreatePost(c.Request.Context(), "draft") // Default to draft status
+	var req struct {
+		Status      string `json:"status" binding:"omitempty,oneof=draft published archived"`
+		CategoryIDs []int  `json:"category_ids" binding:"required,min=1"`
+	}
+
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	status := req.Status
+	if status == "" {
+		status = "draft" // Default to draft status
+	}
+
+	post, err := h.service.CreatePost(c.Request.Context(), status, req.CategoryIDs)
 	if err != nil {
 		log.Error().Err(err).Msg("Failed to create post")
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to create post"})
@@ -268,7 +285,8 @@ func (h *Handler) CreatePost(c *gin.Context) {
 		"id":     post.ID,
 		"status": post.Status,
 		"edges": gin.H{
-			"contents": []interface{}{},
+			"contents":   []interface{}{},
+			"categories": []interface{}{},
 		},
 	}