add starred to maps API and endpoint to create/delete

app/controllers/api/v2/stars_controller.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+module Api
+  module V2
+    class StarsController < RestfulController
+      skip_before_action :load_resource
+
+      def create
+        @map = Map.find(params[:id])
+        @star = Star.new(user: current_user, map: @map)
+        authorize @map, :star?
+        create_action
+
+        if @star.errors.empty?
+          render json: @map, scope: default_scope, serializer: MapSerializer, root: serializer_root
+        else
+          respond_with_errors
+        end
+      end
+
+      def destroy
+        @map = Map.find(params[:id])
+        authorize @map, :unstar?
+        @star = @map.stars.find_by(user: current_user)
+        @star.destroy if @star.present?
+        head :no_content
+      end
+    end
+  end
+end

app/models/map.rb

@@ -88,6 +88,10 @@ class Map < ApplicationRecord
     updated_at.strftime('%m/%d/%Y')
   end
 
+  def starred_by_user?(user)
+    user.stars.where(map: self).exists?
+  end
+
   def as_json(_options = {})
     json = super(methods: [:user_name, :user_image, :topic_count, :synapse_count, :contributor_count, :collaborator_ids, :screenshot_url], except: [:screenshot_content_type, :screenshot_file_size, :screenshot_file_name, :screenshot_updated_at])
     json[:created_at_clean] = created_at_str

app/models/star.rb

@@ -2,4 +2,5 @@
 class Star < ActiveRecord::Base
   belongs_to :user
   belongs_to :map
+  validates :map, uniqueness: { scope: :user, message: 'You have already starred this map' }
 end

app/serializers/api/v2/map_serializer.rb

@@ -7,9 +7,14 @@ module Api
                  :desc,
                  :permission,
                  :screenshot,
+                 :starred,
                  :created_at,
                  :updated_at
 
+      def starred
+        object.starred_by_user?(scope[:current_user])
+      end
+
       def self.embeddable
         {
           user: {},

config/routes.rb

@@ -65,7 +65,10 @@ Metamaps::Application.routes.draw do
     namespace :v2, path: '/v2' do
       resources :metacodes, only: [:index, :show]
       resources :mappings, only: [:index, :create, :show, :update, :destroy]
-      resources :maps, only: [:index, :create, :show, :update, :destroy]
+      resources :maps, only: [:index, :create, :show, :update, :destroy] do
+        post :stars, to: 'stars#create', on: :member
+        delete :stars, to: 'stars#destroy', on: :member
+      end
       resources :synapses, only: [:index, :create, :show, :update, :destroy]
       resources :tokens, only: [:create, :destroy] do
         get :my_tokens, on: :collection

doc/api/apis/maps.raml

@@ -94,3 +94,15 @@ post:
     responses:
       204:
         description: No content
+  /stars:
+    post:
+      responses:
+        201:
+          description: Created
+          body:
+            application/json:
+              example: !include ../examples/map.json
+    delete:
+      responses:
+        204:
+          description: No content

doc/api/examples/map.json

@@ -5,6 +5,7 @@
         "desc": "Example map for the API",
         "permission": "commons",
         "screenshot": "https://s3.amazonaws.com/metamaps-assets/site/missing-map.png",
+        "starred": false,
         "created_at": "2016-03-26T08:02:05.379Z",
         "updated_at": "2016-03-27T07:20:18.047Z",
         "topic_ids": [

doc/api/examples/maps.json

@@ -6,6 +6,7 @@
       "desc": "Example map for the API",
       "permission": "commons",
       "screenshot": "https://s3.amazonaws.com/metamaps-assets/site/missing-map.png",
+      "starred": false,
       "created_at": "2016-03-26T08:02:05.379Z",
       "updated_at": "2016-03-27T07:20:18.047Z",
       "topic_ids": [

doc/api/schemas/_map.json

@@ -18,6 +18,9 @@
       "format": "uri",
       "type": "string"
     },
+    "starred": {
+      "type": "boolean"
+    },
     "created_at": {
       "$ref": "_datetimestamp.json"
     },
@@ -61,6 +64,7 @@
     "desc",
     "permission",
     "screenshot",
+    "starred",
     "created_at",
     "updated_at"
   ]

spec/api/v2/maps_api_spec.rb

@@ -16,7 +16,7 @@ RSpec.describe 'maps API', type: :request do
   end
 
   it 'GET /api/v2/maps/:id' do
-    get "/api/v2/maps/#{map.id}"
+    get "/api/v2/maps/#{map.id}", params: { access_token: token }
 
     expect(response).to have_http_status(:success)
     expect(response).to match_json_schema(:map)
@@ -45,6 +45,23 @@ RSpec.describe 'maps API', type: :request do
     expect(Map.count).to eq 0
   end
 
+  it 'POST /api/v2/maps/:id/stars' do
+    post "/api/v2/maps/#{map.id}/stars", params: { access_token: token }
+    expect(response).to have_http_status(:success)
+    expect(response).to match_json_schema(:map)
+    expect(user.stars.count).to eq 1
+    expect(map.stars.count).to eq 1
+  end
+
+  it 'DELETE /api/v2/maps/:id/stars' do
+    create(:star, map: map, user: user)
+    delete "/api/v2/maps/#{map.id}/stars", params: { access_token: token }
+
+    expect(response).to have_http_status(:no_content)
+    expect(user.stars.count).to eq 0
+    expect(map.stars.count).to eq 0
+  end
+
   context 'RAML example' do
     let(:resource) { get_json_example(:map) }
     let(:collection) { get_json_example(:maps) }

spec/factories/stars.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+FactoryGirl.define do
+  factory :star do
+  end
+end