Added admin api for managing tags (#26872)

app/controllers/api/v1/admin/tags_controller.rb

@@ -0,0 +1,74 @@
+# frozen_string_literal: true
+
+class Api::V1::Admin::TagsController < Api::BaseController
+  include Authorization
+  before_action -> { authorize_if_got_token! :'admin:read' }, only: [:index, :show]
+  before_action -> { authorize_if_got_token! :'admin:write' }, only: :update
+
+  before_action :set_tags, only: :index
+  before_action :set_tag, except: :index
+
+  after_action :insert_pagination_headers, only: :index
+  after_action :verify_authorized
+
+  LIMIT = 100
+  PAGINATION_PARAMS = %i(limit).freeze
+
+  def index
+    authorize :tag, :index?
+    render json: @tags, each_serializer: REST::Admin::TagSerializer
+  end
+
+  def show
+    authorize @tag, :show?
+    render json: @tag, serializer: REST::Admin::TagSerializer
+  end
+
+  def update
+    authorize @tag, :update?
+    @tag.update!(tag_params.merge(reviewed_at: Time.now.utc))
+    render json: @tag, serializer: REST::Admin::TagSerializer
+  end
+
+  private
+
+  def set_tag
+    @tag = Tag.find(params[:id])
+  end
+
+  def set_tags
+    @tags = Tag.all.to_a_paginated_by_id(limit_param(LIMIT), params_slice(:max_id, :since_id, :min_id))
+  end
+
+  def tag_params
+    params.permit(:display_name, :trendable, :usable, :listable)
+  end
+
+  def insert_pagination_headers
+    set_pagination_headers(next_path, prev_path)
+  end
+
+  def next_path
+    api_v1_admin_tags_url(pagination_params(max_id: pagination_max_id)) if records_continue?
+  end
+
+  def prev_path
+    api_v1_admin_tags_url(pagination_params(min_id: pagination_since_id)) unless @tags.empty?
+  end
+
+  def pagination_max_id
+    @tags.last.id
+  end
+
+  def pagination_since_id
+    @tags.first.id
+  end
+
+  def records_continue?
+    @tags.size == limit_param(LIMIT)
+  end
+
+  def pagination_params(core_params)
+    params.slice(*PAGINATION_PARAMS).permit(*PAGINATION_PARAMS).merge(core_params)
+  end
+end