#99

backend/app/controllers/tags_controller.rb

@@ -84,6 +84,7 @@ class TagsController < ApplicationController
         Tag
         .joins(:tag_name)
         .includes(:tag_name, tag_name: :wiki_page)
+        .where(category: [:meme, :character, :material])
         .where(id: tag_ids)
         .order('tag_names.name')
         .distinct
@@ -93,7 +94,12 @@ class TagsController < ApplicationController
         if tags.empty?
           []
         else
-          TagImplication.where(parent_tag_id: tags.map(&:id)).distinct.pluck(:parent_tag_id)
+          TagImplication
+              .joins(:tag)
+              .where(parent_tag_id: tags.map(&:id),
+                     tags: { category: [:meme, :character, :material] })
+              .distinct
+              .pluck(:parent_tag_id)
         end
 
     render json: tags.map { |tag|
@@ -101,6 +107,18 @@ class TagsController < ApplicationController
     }
   end
 
+  def materials_by_name
+    name = params[:name].to_s.strip
+    return head :bad_request if name.blank?
+
+    tag = Tag.joins(:tag_name)
+             .includes(:tag_name, tag_name: :wiki_page)
+             .find_by(tag_names: { name: })
+    return :not_found unless tag
+
+    render json: build_tag_children(tag)
+  end
+
   def autocomplete
     q = params[:q].to_s.strip.sub(/\Anot:/i, '')
 
@@ -210,4 +228,10 @@ class TagsController < ApplicationController
 
     render json: TagRepr.base(tag)
   end
+
+  private
+
+  def build_tag_children tag
+    TagRepr.base(tag).merge(children: tag.children.map { build_tag_children(_1) })
+  end
 end