Add likes API route

app/controllers/api/v0/likes_controller.rb

@@ -0,0 +1,47 @@
+module Api
+  module V0
+    class LikesController < Api::V0::BaseController
+      before_action only: %i(create destroy) do
+        require_access_token %w(read write)
+      end
+
+      rescue_from ActiveRecord::RecordNotFound do
+        render json: I18n.t("likes.not_found"), status: 404
+      end
+
+      rescue_from ActiveRecord::RecordInvalid do
+        render json: I18n.t("likes.create.fail"), status: 404
+      end
+
+      def create
+        @like = current_user.like!(target) if target
+        if @like
+          render json: @like.as_api_response(:backbone), status: 201
+        else
+          render nothing: true, status: 422
+        end
+      end
+
+      def destroy
+        @like = Like.find_by_id_and_author_id!(params[:id], current_user.person.id)
+        current_user.retract(@like)
+        render nothing: true, status: 204
+      end
+
+      private
+
+      def target
+        @target ||= if params[:post_id]
+                      current_user.find_visible_shareable_by_id(Post, params[:post_id]).tap do |post|
+                        raise(ActiveRecord::RecordNotFound.new) unless post
+                      end
+                    else
+                      Comment.find(params[:comment_id]).tap do |comment|
+                        shareable = current_user.find_visible_shareable_by_id(Post, comment.commentable_id)
+                        raise(ActiveRecord::RecordNotFound.new) unless shareable
+                      end
+                    end
+      end
+    end
+  end
+end

config/locales/diaspora/en.yml

@@ -630,8 +630,22 @@ en:
   likes:
     create:
       error: "Failed to like."
+      fail: "Like creation has failed"
     destroy:
       error: "Failed to unlike."
+    people_like_this:
+      zero: "No likes"
+      one: "%{count} like"
+      other: "%{count} likes"
+    people_like_this_comment:
+      zero: "No likes"
+      one: "%{count} like"
+      other: "%{count} likes"
+    people_dislike_this:
+      zero: "No dislikes"
+      one: "%{count} dislike"
+      other: "%{count} dislikes"
+    not_found: "Post or like not found"
 
   notifications:
     started_sharing:

config/routes.rb

@@ -225,6 +225,7 @@ Rails.application.routes.draw do
     match "user", to: "users#show", via: %i(get post)
     resources :posts, only: %i(show create destroy) do
       resources :comments, only: %i(create destroy)
+      resources :likes, only: %i(create destroy)
     end
     get "activity" => "streams#activity", :as => "activity_stream"
     get "stream" => "streams#multi", :as => "stream"

spec/integration/api/likes_controller_spec.rb

@@ -0,0 +1,40 @@
+require "spec_helper"
+
+describe Api::V0::LikesController do
+  let(:auth) { FactoryGirl.create(:auth_with_read_and_write) }
+  let!(:access_token) { auth.create_access_token.to_s }
+
+  before do
+    @status = auth.user.post(:status_message, text: "This is a status message", public: true, to: "all")
+  end
+
+  describe "#create" do
+    it "returns the expected author" do
+      post api_v0_post_likes_path(post_id: @status.id), access_token: access_token
+      json = JSON.parse(response.body)
+      expect(json["author"]["id"]).to eq(auth.user.person.id)
+    end
+
+    it "fails on random post id" do
+      post api_v0_post_likes_path(post_id: 9999999), access_token: access_token
+      expect(response.body).to eq("Post or like not found")
+    end
+  end
+
+  describe "#delete" do
+    before do
+      post api_v0_post_likes_path(post_id: @status.id), access_token: access_token
+      @like_id = JSON.parse(response.body)["id"]
+    end
+
+    it "succeeds" do
+      delete api_v0_post_like_path(post_id: @status.id, id: @like_id), access_token: access_token
+      expect(response).to be_success
+    end
+
+    it "fails on random like id" do
+      delete api_v0_post_like_path(post_id: @status.id, id: 99999999), access_token: access_token
+      expect(response.body).to eq("Post or like not found")
+    end
+  end
+end