Add collection api.

frontend/src/network/models.ts

@@ -191,3 +191,11 @@ export interface Activity {
   comment?: Comment;
   file?: RFile;
 }
+
+export interface Collection {
+  id: number;
+  title: string;
+  article: string;
+  user: User;
+  images: Image[];
+}

frontend/src/network/network.ts

@@ -19,6 +19,7 @@ import {
   TagWithCount,
   Activity,
   CommentWithRef,
+  Collection,
 } from "./models.ts";
 
 class Network {
@@ -688,6 +689,99 @@ class Network {
       }),
     );
   }
+
+  async createCollection(
+    title: string,
+    article: string,
+  ): Promise<Response<Collection>> {
+    return this._callApi(() =>
+      axios.postForm(`${this.apiBaseUrl}/collection/create`, {
+        title,
+        article,
+      }),
+    );
+  }
+
+  async updateCollection(
+    id: number,
+    title: string,
+    article: string,
+  ): Promise<Response<any>> {
+    return this._callApi(() =>
+      axios.postForm(`${this.apiBaseUrl}/collection/update`, {
+        id,
+        title,
+        article,
+      }),
+    );
+  }
+
+  async deleteCollection(id: number): Promise<Response<any>> {
+    return this._callApi(() =>
+      axios.postForm(`${this.apiBaseUrl}/collection/delete`, {
+        id,
+      }),
+    );
+  }
+
+  async getCollection(id: number): Promise<Response<Collection>> {
+    return this._callApi(() =>
+      axios.get(`${this.apiBaseUrl}/collection/${id}`),
+    );
+  }
+
+  async listUserCollections(page: number = 1): Promise<PageResponse<Collection>> {
+    return this._callApi(() =>
+      axios.get(`${this.apiBaseUrl}/collection/list`, {
+        params: { page },
+      }),
+    );
+  }
+
+  async listCollectionResources(
+    collectionId: number,
+    page: number = 1,
+  ): Promise<PageResponse<Resource>> {
+    return this._callApi(() =>
+      axios.get(`${this.apiBaseUrl}/collection/${collectionId}/resources`, {
+        params: { page },
+      }),
+    );
+  }
+
+  async addResourceToCollection(
+    collectionId: number,
+    resourceId: number,
+  ): Promise<Response<any>> {
+    return this._callApi(() =>
+      axios.postForm(`${this.apiBaseUrl}/collection/add_resource`, {
+        collection_id: collectionId,
+        resource_id: resourceId,
+      }),
+    );
+  }
+
+  async removeResourceFromCollection(
+    collectionId: number,
+    resourceId: number,
+  ): Promise<Response<any>> {
+    return this._callApi(() =>
+      axios.postForm(`${this.apiBaseUrl}/collection/remove_resource`, {
+        collection_id: collectionId,
+        resource_id: resourceId,
+      }),
+    );
+  }
+
+  async searchUserCollections(
+    keyword: string,
+  ): Promise<Response<Collection[]>> {
+    return this._callApi(() =>
+      axios.get(`${this.apiBaseUrl}/collection/search`, {
+        params: { keyword },
+      }),
+    );
+  }
 }
 
 export const network = new Network();

main.go

@@ -1,11 +1,12 @@
 package main
 
 import (
-	"github.com/gofiber/fiber/v3"
-	"github.com/gofiber/fiber/v3/middleware/logger"
 	"log"
 	"nysoure/server/api"
 	"nysoure/server/middleware"
+
+	"github.com/gofiber/fiber/v3"
+	"github.com/gofiber/fiber/v3/middleware/logger"
 )
 
 func main() {
@@ -35,6 +36,7 @@ func main() {
 		api.AddCommentRoutes(apiG)
 		api.AddConfigRoutes(apiG)
 		api.AddActivityRoutes(apiG)
+		api.AddCollectionRoutes(apiG) // 新增
 	}
 
 	log.Fatal(app.Listen(":3000"))

server/api/collection.go

@@ -0,0 +1,227 @@
+package api
+
+import (
+	"nysoure/server/model"
+	"nysoure/server/service"
+	"strconv"
+
+	"github.com/gofiber/fiber/v3"
+)
+
+func handleCreateCollection(c fiber.Ctx) error {
+	uid, ok := c.Locals("uid").(uint)
+	if !ok {
+		return model.NewUnAuthorizedError("Unauthorized")
+	}
+	title := c.FormValue("title")
+	article := c.FormValue("article")
+	if title == "" || article == "" {
+		return model.NewRequestError("Title and article are required")
+	}
+	host := c.Hostname()
+	col, err := service.CreateCollection(uid, title, article, host)
+	if err != nil {
+		return err
+	}
+	return c.Status(fiber.StatusOK).JSON(model.Response[model.CollectionView]{
+		Success: true,
+		Data:    *col,
+		Message: "Collection created successfully",
+	})
+}
+
+func handleUpdateCollection(c fiber.Ctx) error {
+	uid, ok := c.Locals("uid").(uint)
+	if !ok {
+		return model.NewUnAuthorizedError("Unauthorized")
+	}
+	idStr := c.FormValue("id")
+	title := c.FormValue("title")
+	article := c.FormValue("article")
+	if idStr == "" || title == "" || article == "" {
+		return model.NewRequestError("ID, title and article are required")
+	}
+	id, err := strconv.Atoi(idStr)
+	if err != nil {
+		return model.NewRequestError("Invalid collection ID")
+	}
+	host := c.Hostname()
+	if err := service.UpdateCollection(uid, uint(id), title, article, host); err != nil {
+		return err
+	}
+	return c.Status(fiber.StatusOK).JSON(model.Response[any]{
+		Success: true,
+		Message: "Collection updated successfully",
+	})
+}
+
+func handleDeleteCollection(c fiber.Ctx) error {
+	uid, ok := c.Locals("uid").(uint)
+	if !ok {
+		return model.NewUnAuthorizedError("Unauthorized")
+	}
+	idStr := c.FormValue("id")
+	if idStr == "" {
+		return model.NewRequestError("ID is required")
+	}
+	id, err := strconv.Atoi(idStr)
+	if err != nil {
+		return model.NewRequestError("Invalid collection ID")
+	}
+	if err := service.DeleteCollection(uid, uint(id)); err != nil {
+		return err
+	}
+	return c.Status(fiber.StatusOK).JSON(model.Response[any]{
+		Success: true,
+		Message: "Collection deleted successfully",
+	})
+}
+
+func handleGetCollection(c fiber.Ctx) error {
+	idStr := c.Params("id")
+	id, err := strconv.Atoi(idStr)
+	if err != nil {
+		return model.NewRequestError("Invalid collection ID")
+	}
+	col, err := service.GetCollectionByID(uint(id))
+	if err != nil {
+		return err
+	}
+	return c.Status(fiber.StatusOK).JSON(model.Response[model.CollectionView]{
+		Success: true,
+		Data:    *col,
+		Message: "Collection retrieved successfully",
+	})
+}
+
+func handleListUserCollections(c fiber.Ctx) error {
+	uid, ok := c.Locals("uid").(uint)
+	if !ok {
+		return model.NewUnAuthorizedError("Unauthorized")
+	}
+	pageStr := c.Query("page", "1")
+	page, err := strconv.Atoi(pageStr)
+	if err != nil || page < 1 {
+		page = 1
+	}
+	cols, total, err := service.ListUserCollections(uid, page)
+	if err != nil {
+		return err
+	}
+	return c.Status(fiber.StatusOK).JSON(model.PageResponse[*model.CollectionView]{
+		Success:    true,
+		TotalPages: int(total),
+		Data:       cols,
+		Message:    "Collections retrieved successfully",
+	})
+}
+
+func handleListCollectionResources(c fiber.Ctx) error {
+	idStr := c.Params("id")
+	id, err := strconv.Atoi(idStr)
+	if err != nil {
+		return model.NewRequestError("Invalid collection ID")
+	}
+	pageStr := c.Query("page", "1")
+	page, err := strconv.Atoi(pageStr)
+	if err != nil || page < 1 {
+		page = 1
+	}
+	res, total, err := service.ListCollectionResources(uint(id), page)
+	if err != nil {
+		return err
+	}
+	return c.Status(fiber.StatusOK).JSON(model.PageResponse[*model.ResourceView]{
+		Success:    true,
+		TotalPages: int(total),
+		Data:       res,
+		Message:    "Resources retrieved successfully",
+	})
+}
+
+func handleAddResourceToCollection(c fiber.Ctx) error {
+	uid, ok := c.Locals("uid").(uint)
+	if !ok {
+		return model.NewUnAuthorizedError("Unauthorized")
+	}
+	collectionIDStr := c.FormValue("collection_id")
+	resourceIDStr := c.FormValue("resource_id")
+	if collectionIDStr == "" || resourceIDStr == "" {
+		return model.NewRequestError("collection_id and resource_id are required")
+	}
+	collectionID, err := strconv.Atoi(collectionIDStr)
+	if err != nil {
+		return model.NewRequestError("Invalid collection_id")
+	}
+	resourceID, err := strconv.Atoi(resourceIDStr)
+	if err != nil {
+		return model.NewRequestError("Invalid resource_id")
+	}
+	if err := service.AddResourceToCollection(uid, uint(collectionID), uint(resourceID)); err != nil {
+		return err
+	}
+	return c.Status(fiber.StatusOK).JSON(model.Response[any]{
+		Success: true,
+		Message: "Resource added to collection successfully",
+	})
+}
+
+func handleRemoveResourceFromCollection(c fiber.Ctx) error {
+	uid, ok := c.Locals("uid").(uint)
+	if !ok {
+		return model.NewUnAuthorizedError("Unauthorized")
+	}
+	collectionIDStr := c.FormValue("collection_id")
+	resourceIDStr := c.FormValue("resource_id")
+	if collectionIDStr == "" || resourceIDStr == "" {
+		return model.NewRequestError("collection_id and resource_id are required")
+	}
+	collectionID, err := strconv.Atoi(collectionIDStr)
+	if err != nil {
+		return model.NewRequestError("Invalid collection_id")
+	}
+	resourceID, err := strconv.Atoi(resourceIDStr)
+	if err != nil {
+		return model.NewRequestError("Invalid resource_id")
+	}
+	if err := service.RemoveResourceFromCollection(uid, uint(collectionID), uint(resourceID)); err != nil {
+		return err
+	}
+	return c.Status(fiber.StatusOK).JSON(model.Response[any]{
+		Success: true,
+		Message: "Resource removed from collection successfully",
+	})
+}
+
+func handleSearchUserCollections(c fiber.Ctx) error {
+	uid, ok := c.Locals("uid").(uint)
+	if !ok {
+		return model.NewUnAuthorizedError("Unauthorized")
+	}
+	keyword := c.Query("keyword", "")
+	if keyword == "" {
+		return model.NewRequestError("keyword is required")
+	}
+	cols, err := service.SearchUserCollections(uid, keyword)
+	if err != nil {
+		return err
+	}
+	return c.Status(fiber.StatusOK).JSON(model.Response[[]*model.CollectionView]{
+		Success: true,
+		Data:    cols,
+		Message: "Collections found successfully",
+	})
+}
+
+func AddCollectionRoutes(r fiber.Router) {
+	cg := r.Group("collection")
+	cg.Post("/create", handleCreateCollection)
+	cg.Post("/update", handleUpdateCollection)
+	cg.Post("/delete", handleDeleteCollection)
+	cg.Get("/:id", handleGetCollection)
+	cg.Get("/list", handleListUserCollections)
+	cg.Get("/:id/resources", handleListCollectionResources)
+	cg.Post("/add_resource", handleAddResourceToCollection)
+	cg.Post("/remove_resource", handleRemoveResourceFromCollection)
+	cg.Get("/search", handleSearchUserCollections)
+}

server/dao/collection.go

@@ -0,0 +1,193 @@
+package dao
+
+import (
+	"nysoure/server/model"
+
+	"gorm.io/gorm"
+)
+
+func CreateCollection(uid uint, title string, article string, images []uint) (model.Collection, error) {
+	var collection model.Collection
+	err := db.Transaction(func(tx *gorm.DB) error {
+		collection = model.Collection{
+			UserID:  uid,
+			Title:   title,
+			Article: article,
+		}
+
+		if err := tx.Create(collection).Error; err != nil {
+			return err
+		}
+
+		if err := tx.Model(collection).Association("Images").Replace(images); err != nil {
+			return err
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		return model.Collection{}, err
+	}
+	return collection, nil
+}
+
+func UpdateCollection(id uint, title string, article string, images []uint) error {
+	return db.Transaction(func(tx *gorm.DB) error {
+		collection := &model.Collection{
+			Title:   title,
+			Article: article,
+		}
+
+		if err := tx.Model(collection).Where("id = ?", id).Updates(collection).Error; err != nil {
+			return err
+		}
+
+		if err := tx.Model(collection).Association("Images").Replace(images); err != nil {
+			return err
+		}
+
+		return nil
+	})
+}
+
+func DeleteCollection(id uint) error {
+	return db.Transaction(func(tx *gorm.DB) error {
+		collection := &model.Collection{}
+
+		if err := tx.Where("id = ?", id).First(collection).Error; err != nil {
+			return err
+		}
+
+		if err := tx.Model(collection).Association("Images").Clear(); err != nil {
+			return err
+		}
+
+		if err := tx.Model(collection).Association("Resources").Clear(); err != nil {
+			return err
+		}
+
+		if err := tx.Delete(collection).Error; err != nil {
+			return err
+		}
+
+		return nil
+	})
+}
+
+func AddResourceToCollection(collectionID uint, resourceID uint) error {
+	return db.Transaction(func(tx *gorm.DB) error {
+		collection := &model.Collection{}
+
+		if err := tx.Where("id = ?", collectionID).First(collection).Error; err != nil {
+			return err
+		}
+
+		if err := tx.Model(collection).Association("Resources").Append(&model.Resource{
+			Model: gorm.Model{
+				ID: resourceID,
+			},
+		}); err != nil {
+			return err
+		}
+
+		return nil
+	})
+}
+
+func RemoveResourceFromCollection(collectionID uint, resourceID uint) error {
+	return db.Transaction(func(tx *gorm.DB) error {
+		collection := &model.Collection{}
+
+		if err := tx.Where("id = ?", collectionID).First(collection).Error; err != nil {
+			return err
+		}
+
+		if err := tx.Model(collection).Association("Resources").Delete(&model.Resource{
+			Model: gorm.Model{
+				ID: resourceID,
+			},
+		}); err != nil {
+			return err
+		}
+
+		return nil
+	})
+}
+
+func GetCollectionByID(id uint) (*model.Collection, error) {
+	collection := &model.Collection{}
+	if err := db.Preload("Images").Preload("Resources").Where("id = ?", id).First(collection).Error; err != nil {
+		return nil, err
+	}
+	return collection, nil
+}
+
+func ListUserCollections(uid uint, page int, pageSize int) ([]*model.Collection, int64, error) {
+	var collections []*model.Collection
+	var total int64
+
+	if err := db.Model(&model.Collection{}).Where("user_id = ?", uid).Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	if err := db.
+		Model(&model.Collection{}).
+		Preload("Images").
+		Preload("Resources").
+		Where("user_id = ?", uid).
+		Offset((page - 1) * pageSize).
+		Limit(pageSize).
+		Find(&collections).Error; err != nil {
+		return nil, 0, err
+	}
+
+	totalPages := (total + int64(pageSize) - 1) / int64(pageSize)
+
+	return collections, totalPages, nil
+}
+
+func ListCollectionResources(collectionID uint, page int, pageSize int) ([]*model.Resource, int64, error) {
+	var resources []*model.Resource
+	var total int64
+
+	if err := db.Raw(`
+		select count(*) from collection_resources
+		where collection_id = ?`, collectionID).Scan(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	if err := db.
+		Model(&model.Resource{}).
+		Preload("User").
+		Preload("Images").
+		Preload("Tags").
+		Joins("JOIN collection_resources ON collection_resources.resource_id = resources.id").
+		Where("collection_resources.collection_id = ?", collectionID).
+		Offset((page - 1) * pageSize).
+		Limit(pageSize).
+		Find(&resources).Error; err != nil {
+		return nil, 0, err
+	}
+
+	totalPages := (total + int64(pageSize) - 1) / int64(pageSize)
+
+	return resources, totalPages, nil
+}
+
+// SearchUserCollections searches for collections by user ID and keyword limited to 10 results.
+func SearchUserCollections(uid uint, keyword string) ([]*model.Collection, error) {
+	var collections []*model.Collection
+
+	if err := db.
+		Model(&model.Collection{}).
+		Preload("Images").
+		Preload("Resources").
+		Where("user_id = ? AND title LIKE ?", uid, "%"+keyword+"%").
+		Limit(10).
+		Find(&collections).Error; err != nil {
+		return nil, err
+	}
+
+	return collections, nil
+}

server/dao/image.go

@@ -2,9 +2,10 @@ package dao
 
 import (
 	"errors"
-	"gorm.io/gorm"
 	"nysoure/server/model"
 	"time"
+
+	"gorm.io/gorm"
 )
 
 func CreateImage(name string, width, height int) (model.Image, error) {
@@ -45,6 +46,7 @@ func GetUnusedImages() ([]model.Image, error) {
 	if err := db.
 		Where("NOT EXISTS (SELECT 1 FROM resource_images WHERE image_id = images.id)").
 		Where("NOT EXISTS (SELECT 1 FROM comment_images WHERE image_id = images.id)").
+		Where("NOT EXISTS (SELECT 1 FROM collection_images WHERE image_id = images.id)").
 		Where("created_at < ?", oneDayAgo).
 		Find(&images).Error; err != nil {
 		if errors.Is(err, gorm.ErrRecordNotFound) {

server/model/collection.go

@@ -0,0 +1,31 @@
+package model
+
+import "gorm.io/gorm"
+
+type Collection struct {
+	gorm.Model
+	Title     string     `gorm:"not null"`
+	Article   string     `gorm:"not null"`
+	UserID    uint       `gorm:"not null"`
+	User      User       `gorm:"foreignKey:UserID;references:ID"`
+	Images    []Image    `gorm:"many2many:collection_images;"`
+	Resources []Resource `gorm:"many2many:collection_resources;"`
+}
+
+type CollectionView struct {
+	ID      uint     `json:"id"`
+	Title   string   `json:"title"`
+	Article string   `json:"article"`
+	User    UserView `json:"user"`
+	Images  []Image  `json:"images"`
+}
+
+func (c Collection) ToView() *CollectionView {
+	return &CollectionView{
+		ID:      c.ID,
+		Title:   c.Title,
+		Article: c.Article,
+		User:    c.User.ToView(),
+		Images:  c.Images,
+	}
+}

server/service/collection.go

@@ -0,0 +1,145 @@
+package service
+
+import (
+	"errors"
+	"nysoure/server/dao"
+	"nysoure/server/model"
+)
+
+// Create a new collection.
+func CreateCollection(uid uint, title, article string, host string) (*model.CollectionView, error) {
+	if uid == 0 || title == "" || article == "" {
+		return nil, errors.New("invalid parameters")
+	}
+	c, err := dao.CreateCollection(uid, title, article, findImagesInContent(article, host))
+	if err != nil {
+		return nil, err
+	}
+	view := c.ToView()
+	return view, nil
+}
+
+// Update an existing collection with user validation.
+func UpdateCollection(uid, id uint, title, article string, host string) error {
+	if uid == 0 || id == 0 || title == "" || article == "" {
+		return errors.New("invalid parameters")
+	}
+	collection, err := dao.GetCollectionByID(id)
+	if err != nil {
+		return err
+	}
+	if collection.UserID != uid {
+		return errors.New("user does not have permission to update this collection")
+	}
+	return dao.UpdateCollection(id, title, article, findImagesInContent(article, host))
+}
+
+// Delete a collection by ID.
+func DeleteCollection(uint, id uint) error {
+	user, err := dao.GetUserByID(id)
+	if err != nil {
+		return err
+	}
+
+	collection, err := dao.GetCollectionByID(id)
+	if err != nil {
+		return err
+	}
+
+	if user.ID != collection.UserID && !user.IsAdmin {
+		return errors.New("user does not have permission to delete this collection")
+	}
+
+	return dao.DeleteCollection(id)
+}
+
+// Add a resource to a collection with user validation.
+func AddResourceToCollection(uid, collectionID, resourceID uint) error {
+	if uid == 0 || collectionID == 0 || resourceID == 0 {
+		return errors.New("invalid parameters")
+	}
+	collection, err := dao.GetCollectionByID(collectionID)
+	if err != nil {
+		return err
+	}
+	if collection.UserID != uid {
+		return errors.New("user does not have permission to modify this collection")
+	}
+	return dao.AddResourceToCollection(collectionID, resourceID)
+}
+
+// Remove a resource from a collection with user validation.
+func RemoveResourceFromCollection(uid, collectionID, resourceID uint) error {
+	if uid == 0 || collectionID == 0 || resourceID == 0 {
+		return errors.New("invalid parameters")
+	}
+	collection, err := dao.GetCollectionByID(collectionID)
+	if err != nil {
+		return err
+	}
+	if collection.UserID != uid {
+		return errors.New("user does not have permission to modify this collection")
+	}
+	return dao.RemoveResourceFromCollection(collectionID, resourceID)
+}
+
+// Get a collection by ID.
+func GetCollectionByID(id uint) (*model.CollectionView, error) {
+	if id == 0 {
+		return nil, errors.New("invalid collection id")
+	}
+	c, err := dao.GetCollectionByID(id)
+	if err != nil {
+		return nil, err
+	}
+	return c.ToView(), nil
+}
+
+// List collections of a user with pagination.
+func ListUserCollections(uid uint, page int) ([]*model.CollectionView, int64, error) {
+	if uid == 0 || page < 1 {
+		return nil, 0, errors.New("invalid parameters")
+	}
+	collections, total, err := dao.ListUserCollections(uid, page, pageSize)
+	if err != nil {
+		return nil, 0, err
+	}
+	var views []*model.CollectionView
+	for _, c := range collections {
+		views = append(views, c.ToView())
+	}
+	return views, total, nil
+}
+
+// List resources in a collection with pagination.
+func ListCollectionResources(collectionID uint, page int) ([]*model.ResourceView, int64, error) {
+	if collectionID == 0 || page < 1 {
+		return nil, 0, errors.New("invalid parameters")
+	}
+	resources, total, err := dao.ListCollectionResources(collectionID, page, pageSize)
+	if err != nil {
+		return nil, 0, err
+	}
+	var views []*model.ResourceView
+	for _, r := range resources {
+		v := r.ToView()
+		views = append(views, &v)
+	}
+	return views, total, nil
+}
+
+// Search user collections by keyword, limited to 10 results.
+func SearchUserCollections(uid uint, keyword string) ([]*model.CollectionView, error) {
+	if uid == 0 || keyword == "" {
+		return nil, errors.New("invalid parameters")
+	}
+	collections, err := dao.SearchUserCollections(uid, keyword)
+	if err != nil {
+		return nil, err
+	}
+	var views []*model.CollectionView
+	for _, c := range collections {
+		views = append(views, c.ToView())
+	}
+	return views, nil
+}

server/service/comment.go

@@ -4,7 +4,6 @@ import (
 	"nysoure/server/dao"
 	"nysoure/server/model"
 	"regexp"
-	"strconv"
 	"strings"
 
 	"github.com/gofiber/fiber/v3/log"
@@ -22,39 +21,6 @@ type CommentRequest struct {
 	// Images  []uint `json:"images"` // Unrequired after new design
 }
 
-func findImagesInContent(content string, host string) []uint {
-	// Handle both absolute and relative URLs
-	absolutePattern := `!\[.*?\]\((?:https?://` + host + `)?/api/image/(\d+)(?:\s+["'].*?["'])?\)`
-	relativePattern := `!\[.*?\]\(/api/image/(\d+)(?:\s+["'].*?["'])?\)`
-
-	// Combine patterns and compile regex
-	patterns := []string{absolutePattern, relativePattern}
-
-	// Store unique image IDs to avoid duplicates
-	imageIDs := make(map[uint]struct{})
-
-	for _, pattern := range patterns {
-		re := regexp.MustCompile(pattern)
-		matches := re.FindAllStringSubmatch(content, -1)
-
-		for _, match := range matches {
-			if len(match) >= 2 {
-				if id, err := strconv.ParseUint(match[1], 10, 32); err == nil {
-					imageIDs[uint(id)] = struct{}{}
-				}
-			}
-		}
-	}
-
-	// Convert map keys to slice
-	result := make([]uint, 0, len(imageIDs))
-	for id := range imageIDs {
-		result = append(result, id)
-	}
-
-	return result
-}
-
 func CreateComment(req CommentRequest, userID uint, refID uint, ip string, cType model.CommentType, host string) (*model.CommentView, error) {
 	if len(req.Content) == 0 {
 		return nil, model.NewRequestError("Content cannot be empty")

server/service/utils.go

@@ -6,6 +6,8 @@ import (
 	"net/http"
 	"nysoure/server/config"
 	"nysoure/server/dao"
+	"regexp"
+	"strconv"
 )
 
 func checkUserCanUpload(uid uint) (bool, error) {
@@ -58,3 +60,36 @@ func verifyCfToken(cfToken string) (bool, error) {
 		return false, nil
 	}
 }
+
+func findImagesInContent(content string, host string) []uint {
+	// Handle both absolute and relative URLs
+	absolutePattern := `!\[.*?\]\((?:https?://` + host + `)?/api/image/(\d+)(?:\s+["'].*?["'])?\)`
+	relativePattern := `!\[.*?\]\(/api/image/(\d+)(?:\s+["'].*?["'])?\)`
+
+	// Combine patterns and compile regex
+	patterns := []string{absolutePattern, relativePattern}
+
+	// Store unique image IDs to avoid duplicates
+	imageIDs := make(map[uint]struct{})
+
+	for _, pattern := range patterns {
+		re := regexp.MustCompile(pattern)
+		matches := re.FindAllStringSubmatch(content, -1)
+
+		for _, match := range matches {
+			if len(match) >= 2 {
+				if id, err := strconv.ParseUint(match[1], 10, 32); err == nil {
+					imageIDs[uint(id)] = struct{}{}
+				}
+			}
+		}
+	}
+
+	// Convert map keys to slice
+	result := make([]uint, 0, len(imageIDs))
+	for id := range imageIDs {
+		result = append(result, id)
+	}
+
+	return result
+}