Initial commit

server/service/resource.go

@@ -0,0 +1,129 @@
+package service
+
+import (
+	"nysoure/server/dao"
+	"nysoure/server/model"
+
+	"gorm.io/gorm"
+)
+
+const (
+	pageSize = 20
+)
+
+type ResourceCreateParams struct {
+	Title             string   `json:"title" binding:"required"`
+	AlternativeTitles []string `json:"alternative_titles"`
+	Tags              []uint   `json:"tags"`
+	Article           string   `json:"article"`
+	Images            []uint   `json:"images"`
+}
+
+func CreateResource(uid uint, params *ResourceCreateParams) (uint, error) {
+	canUpload, err := checkUserCanUpload(uid)
+	if err != nil {
+		return 0, err
+	}
+	if !canUpload {
+		return 0, model.NewUnAuthorizedError("You have not permission to upload resources")
+	}
+
+	images := make([]model.Image, len(params.Images))
+	for i, id := range params.Images {
+		images[i] = model.Image{
+			Model: gorm.Model{
+				ID: id,
+			},
+		}
+	}
+	tags := make([]model.Tag, len(params.Tags))
+	for i, id := range params.Tags {
+		tags[i] = model.Tag{
+			Model: gorm.Model{
+				ID: id,
+			},
+		}
+	}
+	r := model.Resource{
+		Title:             params.Title,
+		AlternativeTitles: params.AlternativeTitles,
+		Article:           params.Article,
+		Images:            images,
+		Tags:              tags,
+		UserID:            uid,
+	}
+	if r, err = dao.CreateResource(r); err != nil {
+		return 0, err
+	}
+	return r.ID, nil
+}
+
+func GetResource(id uint) (*model.ResourceDetailView, error) {
+	r, err := dao.GetResourceByID(id)
+	if err != nil {
+		return nil, err
+	}
+	v := r.ToDetailView()
+	return &v, nil
+}
+
+func GetResourceList(page int) ([]model.ResourceView, int, error) {
+	resources, totalPages, err := dao.GetResourceList(page, pageSize)
+	if err != nil {
+		return nil, 0, err
+	}
+	var views []model.ResourceView
+	for _, r := range resources {
+		views = append(views, r.ToView())
+	}
+	return views, totalPages, nil
+}
+
+func SearchResource(keyword string, page int) ([]model.ResourceView, int, error) {
+	resources, totalPages, err := dao.Search(keyword, page, pageSize)
+	if err != nil {
+		return nil, 0, err
+	}
+	var views []model.ResourceView
+	for _, r := range resources {
+		views = append(views, r.ToView())
+	}
+	return views, totalPages, nil
+}
+
+func DeleteResource(uid, id uint) error {
+	isAdmin, err := checkUserIsAdmin(uid)
+	if err != nil {
+		return err
+	}
+	if !isAdmin {
+		r, err := dao.GetResourceByID(id)
+		if err != nil {
+			return err
+		}
+		if r.UserID != uid {
+			return model.NewUnAuthorizedError("You have not permission to delete this resource")
+		}
+	}
+	if err := dao.DeleteResource(id); err != nil {
+		return err
+	}
+	return nil
+}
+
+func GetResourcesWithTag(tag string, page int) ([]model.ResourceView, int, error) {
+	t, err := dao.GetTagByName(tag)
+	if err != nil {
+		return nil, 0, err
+	}
+	tagID := t.ID
+	resources, totalPages, err := dao.GetResourceByTag(tagID, page, pageSize)
+	if err != nil {
+		return nil, 0, err
+	}
+	var views []model.ResourceView
+	for _, r := range resources {
+		views = append(views, r.ToView())
+	}
+	return views, totalPages, nil
+}