Add tag description.

server/api/tag.go

@@ -2,6 +2,7 @@ package api
 
 import (
 	"github.com/gofiber/fiber/v3"
+	"net/url"
 	"nysoure/server/model"
 	"nysoure/server/service"
 	"strconv"
@@ -65,11 +66,59 @@ func handleDeleteTag(c fiber.Ctx) error {
 	})
 }
 
+func handleSetTagDescription(c fiber.Ctx) error {
+	uid, ok := c.Locals("uid").(uint)
+	if !ok {
+		return model.NewUnAuthorizedError("You must be logged in to set tag description")
+	}
+	id, err := strconv.Atoi(c.Params("id"))
+	if err != nil {
+		return model.NewRequestError("Invalid tag ID")
+	}
+	description := c.FormValue("description")
+	if description == "" {
+		return model.NewRequestError("Description is required")
+	}
+	description = strings.TrimSpace(description)
+	t, err := service.SetTagDescription(uid, uint(id), description)
+	if err != nil {
+		return err
+	}
+	return c.Status(fiber.StatusOK).JSON(model.Response[model.TagView]{
+		Success: true,
+		Data:    *t,
+		Message: "Tag description updated successfully",
+	})
+}
+
+func handleGetTagByName(c fiber.Ctx) error {
+	name := c.Params("name")
+	if name == "" {
+		return model.NewRequestError("Tag name is required")
+	}
+	name, err := url.PathUnescape(name)
+	if err != nil {
+		return model.NewRequestError("Invalid tag name format")
+	}
+	name = strings.TrimSpace(name)
+	t, err := service.GetTagByName(name)
+	if err != nil {
+		return err
+	}
+	return c.Status(fiber.StatusOK).JSON(model.Response[model.TagView]{
+		Success: true,
+		Data:    *t,
+		Message: "Tag retrieved successfully",
+	})
+}
+
 func AddTagRoutes(api fiber.Router) {
 	tag := api.Group("/tag")
 	{
 		tag.Post("/", handleCreateTag)
 		tag.Get("/search", handleSearchTag)
 		tag.Delete("/:id", handleDeleteTag)
+		tag.Put("/:id/description", handleSetTagDescription)
+		tag.Get("/:name", handleGetTagByName)
 	}
 }

server/dao/tag.go

@@ -58,3 +58,10 @@ func GetTagByName(name string) (model.Tag, error) {
 	}
 	return t, nil
 }
+
+func SetTagDescription(id uint, description string) error {
+	if err := db.Model(model.Tag{}).Where("id = ?", id).Update("description", description).Error; err != nil {
+		return err
+	}
+	return nil
+}

server/middleware/frontend_middleware.go

@@ -40,7 +40,7 @@ func handleRobotsTxt(c fiber.Ctx) error {
 	c.Set("Content-Type", "text/plain; charset=utf-8")
 	c.Set("Cache-Control", "no-cache")
 	c.Set("X-Robots-Tag", "noindex")
-	return c.SendString("User-agent: *\nDisallow: /api/\nDisallow: /admin/\n")
+	return c.SendString("User-agent: *\nDisallow: /api/\n\nSitemap: " + c.BaseURL() + "/sitemap.xml\n")
 }
 
 func handleSiteMap(c fiber.Ctx) error {
@@ -92,6 +92,13 @@ func serveIndexHtml(c fiber.Ctx) error {
 			title = u.Username
 			description = "User " + u.Username + "'s profile"
 		}
+	} else if strings.HasPrefix(path, "/tag/") {
+		tagName := strings.TrimPrefix(path, "/tag/")
+		t, err := service.GetTagByName(tagName)
+		if err == nil {
+			title = "Tag: " + t.Name
+			description = utils.ArticleToDescription(t.Description, 256)
+		}
 	}
 
 	content = strings.ReplaceAll(content, "{{SiteName}}", siteName)

server/model/tag.go

@@ -4,18 +4,21 @@ import "gorm.io/gorm"
 
 type Tag struct {
 	gorm.Model
-	Name      string     `gorm:"unique"`
-	Resources []Resource `gorm:"many2many:resource_tags;"`
+	Name        string `gorm:"unique"`
+	Description string
+	Resources   []Resource `gorm:"many2many:resource_tags;"`
 }
 
 type TagView struct {
-	ID   uint   `json:"id"`
-	Name string `json:"name"`
+	ID          uint   `json:"id"`
+	Name        string `json:"name"`
+	Description string `json:"description"`
 }
 
 func (t *Tag) ToView() *TagView {
 	return &TagView{
-		ID:   t.ID,
-		Name: t.Name,
+		ID:          t.ID,
+		Name:        t.Name,
+		Description: t.Description,
 	}
 }

server/service/tag.go

@@ -30,6 +30,14 @@ func GetTag(id uint) (*model.TagView, error) {
 	return t.ToView(), nil
 }
 
+func GetTagByName(name string) (*model.TagView, error) {
+	t, err := dao.GetTagByName(name)
+	if err != nil {
+		return nil, err
+	}
+	return t.ToView(), nil
+}
+
 func SearchTag(name string) ([]model.TagView, error) {
 	tags, err := dao.SearchTag(name)
 	if err != nil {
@@ -45,3 +53,23 @@ func SearchTag(name string) ([]model.TagView, error) {
 func DeleteTag(id uint) error {
 	return dao.DeleteTag(id)
 }
+
+func SetTagDescription(uid uint, id uint, description string) (*model.TagView, error) {
+	canUpload, err := checkUserCanUpload(uid)
+	if err != nil {
+		log.Error("Error checking user permissions:", err)
+		return nil, model.NewInternalServerError("Error checking user permissions")
+	}
+	if !canUpload {
+		return nil, model.NewUnAuthorizedError("User cannot set tag description")
+	}
+	t, err := dao.GetTagByID(id)
+	if err != nil {
+		return nil, err
+	}
+	t.Description = description
+	if err := dao.SetTagDescription(id, description); err != nil {
+		return nil, err
+	}
+	return t.ToView(), nil
+}