Merge comment services into one

app/controllers/comments_controller.rb

@@ -12,18 +12,17 @@ class CommentsController < ApplicationController
   end
 
   def create
-    @comment = CommentCreationService
-                 .new(post_id: params[:post_id], text: params[:text], user: current_user).create_comment
+    @comment = CommentService.new(post_id: params[:post_id], text: params[:text], user: current_user).create_comment
     if @comment
       respond_create_success
     else
-      render nothing: true, status: 422
+      render nothing: true, status: 404
     end
   end
 
   def destroy
-    deletion_service = CommentDeletionService.new(comment_id: params[:id], user: current_user)
-    if deletion_service.destroy_comment
+    service = CommentService.new(comment_id: params[:id], user: current_user)
+    if service.destroy_comment
       respond_destroy_success
     else
       respond_destroy_error
@@ -37,7 +36,7 @@ def new
   end
 
   def index
-    service = CommentIndexService.new(post_id: params[:post_id], user: current_user)
+    service = CommentService.new(post_id: params[:post_id], user: current_user)
     @post = service.post
     @comments = service.comments
     respond_with do |format|

app/services/comment_service.rb

@@ -0,0 +1,43 @@
+class CommentService
+  attr_reader :post, :comments
+
+  def initialize(params)
+    @user = params[:user]
+    @post_id = params[:post_id]
+    @comment_id = params[:comment_id]
+    @text = params[:text]
+
+    @post = find_post! if @post_id
+    @comments = @post.comments.for_a_stream if @post
+  end
+
+  def create_comment
+    @user.comment!(post, @text) if @post
+  end
+
+  def destroy_comment
+    @comment = Comment.find(@comment_id)
+    if @user.owns?(@comment) || @user.owns?(@comment.parent)
+      @user.retract(@comment)
+      true
+    else
+      false
+    end
+  end
+
+  private
+
+  def find_post!
+    find_post.tap do |post|
+      raise(ActiveRecord::RecordNotFound) unless post
+    end
+  end
+
+  def find_post
+    if @user
+      @user.find_visible_shareable_by_id(Post, @post_id)
+    else
+      Post.find_by_id_and_public(@post_id, true)
+    end
+  end
+end

spec/controllers/comments_controller_spec.rb

@@ -66,7 +66,7 @@
 
       expect(alice).not_to receive(:comment)
       post :create, comment_hash
-      expect(response.code).to eq('422')
+      expect(response.code).to eq("404")
     end
   end