Function handleViewCollectionTag

collections.go:1024–1120

(app *App, w http.ResponseWriter, r *http.Request)

}

func handleViewCollectionTag(app *App, w http.ResponseWriter, r *http.Request) error {
	vars := mux.Vars(r)
	tag := vars["tag"]

	cr := &collectionReq{}
	err := processCollectionRequest(cr, vars, w, r)
	if err != nil {
		return err
	}

	u, err := checkUserForCollection(app, cr, r, false)
	if err != nil {
		return err
	}

	page := getCollectionPage(vars)

	c, err := processCollectionPermissions(app, cr, u, w, r)
	if c == nil || err != nil {
		return err
	}

	coll, _ := newDisplayCollection(c, cr, page)

	taggedPostIDs, err := app.db.GetAllPostsTaggedIDs(c, tag, cr.isCollOwner)
	if err != nil {
		return err
	}

	ttlPosts := len(taggedPostIDs)
	pagePosts := coll.Format.PostsPerPage()
	coll.TotalPages = int(math.Ceil(float64(ttlPosts) / float64(pagePosts)))
	if coll.TotalPages > 0 && page > coll.TotalPages {
		redirURL := fmt.Sprintf("/page/%d", coll.TotalPages)
		if !app.cfg.App.SingleUser {
			redirURL = fmt.Sprintf("/%s%s%s", cr.prefix, coll.Alias, redirURL)
		}
		return impart.HTTPError{http.StatusFound, redirURL}
	}

	coll.Posts, _ = app.db.GetPostsTagged(app.cfg, c, tag, page, cr.isCollOwner)
	if coll.Posts != nil && len(*coll.Posts) == 0 {
		return ErrCollectionPageNotFound
	}

	// Serve collection
	displayPage := TagCollectionPage{
		CollectionPage: CollectionPage{
			DisplayCollection: coll,
			StaticPage:        pageForReq(app, r),
			IsCustomDomain:    cr.isCustomDomain,
		},
		Tag: tag,
	}
	var owner *User
	if u != nil {
		displayPage.Username = u.Username
		displayPage.IsOwner = u.ID == coll.OwnerID