Introduce like-interactions.js

Adapt to latest development

User likes
 Set css class for inline likes on comment

Re-set participation on comment likes

Co-authored-by: Thorsten Claus <ThorstenClaus@web.de>

app/assets/javascripts/app/collections/comments.js

@@ -12,12 +12,17 @@ app.collections.Comments = Backbone.Collection.extend({
 
   make : function(text) {
     var self = this;
-    var comment = new app.models.Comment({ "text": text });
+    var comment = new app.models.Comment({"text": text}, {post: this.post});
 
     var deferred = comment.save({}, {
       url: "/posts/"+ this.post.id +"/comments",
       success: function() {
         comment.set({author: app.currentUser.toJSON(), parent: self.post });
+
+        // Need interactions after make
+        comment.interactions = new app.models.Post.LikeInteractions(
+          _.extend({comment: comment, post: self.post}, comment.get("interactions"))
+        );
         self.add(comment);
       }
     });

app/assets/javascripts/app/collections/likes.js

@@ -4,10 +4,11 @@ app.collections.Likes = Backbone.Collection.extend({
   model: app.models.Like,
 
   initialize : function(models, options) {
-    this.url = (options.post != null) ?
+    // A comment- like has a post reference and a comment reference
+    this.url = (options.comment != null) ?
       // not delegating to post.url() because when it is in a stream collection it delegates to that url
-      "/posts/" + options.post.id + "/likes" :
-      "/comments/" + options.comment.id + "/likes";
+      "/comments/" + options.comment.id + "/likes" :
+      "/posts/" + options.post.id + "/likes";
   }
 });
 // @license-end

app/assets/javascripts/app/models/comment.js

@@ -3,51 +3,15 @@
 app.models.Comment = Backbone.Model.extend({
   urlRoot: "/comments",
 
-  initialize: function() {
-    this.likes = new app.collections.Likes(this.get("likes"), {comment: this});
-  },
-
-  // Copied from Post.Interaction. To be merged in an "interactable" class once comments can be commented too
-  likesCount: function() {
-    return this.get("likes_count");
-  },
-
-  userLike: function() {
-    return this.likes.select(function(like) {
-      return like.get("author") && like.get("author").guid === app.currentUser.get("guid");
-    })[0];
-  },
-
-  toggleLike: function() {
-    if (this.userLike()) {
-      this.unlike();
-    } else {
-      this.like();
-    }
-  },
-
-  like: function() {
-    var self = this;
-    this.likes.create({}, {
-      success: function() {
-        self.post.set({participation: true});
-        self.trigger("change");
-        self.set({"likes_count": self.get("likes_count") + 1});
-        self.likes.trigger("change");
-      },
-      error: function(model, response) {
-        app.flashMessages.handleAjaxError(response);
-      }
-    });
-  },
-
-  unlike: function() {
-    var self = this;
-    this.userLike().destroy({success: function() {
-      self.trigger("change");
-      self.set({"likes_count": self.get("likes_count") - 1});
-      self.likes.trigger("change");
-    }});
+  initialize: function(model, options) {
+    options = options || {};
+    this.post = model.post || options.post || this.collection.post;
+    this.interactions = new app.models.Post.LikeInteractions(
+      _.extend({comment: this, post: this.post}, this.get("interactions"))
+      );
+    this.likes = this.interactions.likes;
+    this.likesCount = this.attributes.likes_count;
+    this.userLike = this.interactions.userLike();
   }
 });
 // @license-end

app/assets/javascripts/app/models/post/interactions.js

@@ -1,75 +1,29 @@
 // @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-v3-or-Later
 
-//require ../post
+//= require ./like_interactions
 
-app.models.Post.Interactions = Backbone.Model.extend({
-  initialize : function(options){
+app.models.Post.Interactions = app.models.Post.LikeInteractions.extend({
+  initialize: function(options) {
+    app.models.Post.LikeInteractions.prototype.initialize.apply(this, arguments);
     this.post = options.post;
-    this.comments = new app.collections.Comments(this.get("comments"), {post : this.post});
-    this.likes = new app.collections.Likes(this.get("likes"), {post : this.post});
-    this.reshares = new app.collections.Reshares(this.get("reshares"), {post : this.post});
+    this.comments = new app.collections.Comments(this.get("comments"), {post: this.post});
+    this.reshares = new app.collections.Reshares(this.get("reshares"), {post: this.post});
   },
 
-  likesCount : function(){
-    return this.get("likes_count");
-  },
-
-  resharesCount : function(){
+  resharesCount: function() {
     return this.get("reshares_count");
   },
 
-  commentsCount : function(){
+  commentsCount: function() {
     return this.get("comments_count");
   },
 
-  userLike : function(){
-    return this.likes.select(function(like){
-      return like.get("author") && like.get("author").guid === app.currentUser.get("guid");
-    })[0];
-  },
-
-  userReshare : function(){
+  userReshare: function() {
     return this.reshares.select(function(reshare){
       return reshare.get("author") && reshare.get("author").guid === app.currentUser.get("guid");
     })[0];
   },
 
-  toggleLike : function() {
-    if(this.userLike()) {
-      this.unlike();
-    } else {
-      this.like();
-    }
-  },
-
-  like : function() {
-    var self = this;
-    this.likes.create({}, {
-      success: function() {
-        self.post.set({participation: true});
-        self.trigger("change");
-        self.set({"likes_count" : self.get("likes_count") + 1});
-        self.likes.trigger("change");
-      },
-      error: function(model, response) {
-        app.flashMessages.handleAjaxError(response);
-      }
-    });
-  },
-
-  unlike : function() {
-    var self = this;
-    this.userLike().destroy({success : function() {
-      self.post.set({participation: false});
-      self.trigger('change');
-      self.set({"likes_count" : self.get("likes_count") - 1});
-      self.likes.trigger("change");
-    },
-      error: function(model, response) {
-        app.flashMessages.handleAjaxError(response);
-    }});
-  },
-
   comment: function(text, options) {
     var self = this;
     options = options || {};
@@ -109,7 +63,7 @@ app.models.Post.Interactions = Backbone.Model.extend({
       });
   },
 
-  userCanReshare : function(){
+  userCanReshare: function() {
     var isReshare = this.post.get("post_type") === "Reshare"
       , rootExists = (isReshare ? this.post.get("root") : true)
       , publicPost = this.post.get("public")

app/assets/javascripts/app/models/post/like_interactions.js

@@ -0,0 +1,57 @@
+// This class contains code extracted from interactions.js to factorize likes management between posts and comments
+
+app.models.Post.LikeInteractions = Backbone.Model.extend({
+
+  initialize: function(options) {
+    this.likes = new app.collections.Likes(this.get("likes"), options);
+    this.post = options.post;
+  },
+
+  likesCount: function() {
+    return this.get("likes_count");
+  },
+
+  userLike: function() {
+    return this.likes.select(function(like) {
+      return like.get("author") && like.get("author").guid === app.currentUser.get("guid");
+    })[0];
+  },
+
+  toggleLike: function() {
+    if (this.userLike()) {
+      this.unlike();
+    } else {
+      this.like();
+    }
+  },
+
+  like: function() {
+    var self = this;
+    this.likes.create({}, {
+      success: function() {
+        self.post.set({participation: true});
+        self.trigger("change");
+        self.set({"likes_count": self.get("likes_count") + 1});
+        self.likes.trigger("change");
+      },
+      error: function(model, response) {
+        app.flashMessages.handleAjaxError(response);
+      }
+    });
+  },
+
+  unlike: function() {
+    var self = this;
+    this.userLike().destroy({
+      success: function() {
+        // TODO: If user unlikes a post and the last like of all comments, then set participation to false
+        self.post.set({participation: false});
+        self.trigger("change");
+        self.set({"likes_count": self.get("likes_count") - 1});
+        self.likes.trigger("change");
+      },
+      error: function(model, response) {
+        app.flashMessages.handleAjaxError(response);
+      }});
+  }
+});

app/assets/javascripts/app/views/comment_view.js

@@ -6,7 +6,11 @@ app.views.Comment = app.views.Content.extend({
   className : "comment media",
   tooltipSelector: "time",
 
-  events : function() {
+  subviews: {
+    ".likes-on-comment": "likesInfoView"
+  },
+
+  events: function() {
     return _.extend({}, app.views.Content.prototype.events, {
       "click .comment_delete": "destroyModel",
       "click .comment_report": "report",
@@ -14,33 +18,40 @@ app.views.Comment = app.views.Content.extend({
     });
   },
 
-  initialize : function(options){
+  initialize: function(options) {
     this.templateName = options.templateName || this.templateName;
+    this.model.interactions.on("change", this.render, this);
     this.model.on("change", this.render, this);
   },
 
-  presenter : function() {
+  presenter: function() {
     return _.extend(this.defaultPresenter(), {
       canRemove: this.canRemove(),
-      text: app.helpers.textFormatter(this.model.get("text"), this.model.get("mentioned_people"))
+      text: app.helpers.textFormatter(this.model.get("text"), this.model.get("mentioned_people")),
+      likesCount: this.model.attributes.likesCount,
+      userLike: this.model.interactions.userLike()
     });
   },
 
-  ownComment : function() {
+  ownComment: function() {
     return app.currentUser.authenticated() && this.model.get("author").diaspora_id === app.currentUser.get("diaspora_id");
   },
 
-  postOwner : function() {
+  postOwner: function() {
     return  app.currentUser.authenticated() && this.model.get("parent").author.diaspora_id === app.currentUser.get("diaspora_id");
   },
 
-  canRemove : function() {
+  canRemove: function() {
     return app.currentUser.authenticated() && (this.ownComment() || this.postOwner());
   },
 
   toggleLike: function(evt) {
     if (evt) { evt.preventDefault(); }
-    this.model.toggleLike();
+    this.model.interactions.toggleLike();
+  },
+
+  likesInfoView: function() {
+    return new app.views.LikesInfo({model: this.model});
   }
 });
 

app/assets/javascripts/app/views/stream_post_views.js

@@ -7,7 +7,7 @@ app.views.StreamPost = app.views.Post.extend({
   subviews : {
     ".feedback": "feedbackView",
     ".comments": "commentStreamView",
-    ".likes": "likesInfoView",
+    ".likes-on-post": "likesInfoView",
     ".reshares": "resharesInfoView",
     ".post-controls": "postControlsView",
     ".post-content": "postContentView",

app/assets/templates/comment_tpl.jst.hbs

@@ -46,5 +46,8 @@
         {{~/if~}}
       </a>
     </div>
+
+    <div class="likes likes-on-comment"> </div>
+
   </div>
 </div>

app/assets/templates/stream-element_tpl.jst.hbs

@@ -37,7 +37,7 @@
 
     {{#unless preview}}
       <div class="feedback nsfw-hidden"> </div>
-      <div class="likes nsfw-hidden"> </div>
+      <div class="likes likes-on-post nsfw-hidden"> </div>
       <div class="reshares nsfw-hidden"> </div>
       <div class="comments nsfw-hidden"> </div>
     {{/unless}}

app/controllers/api/v1/likes_controller.rb

@@ -33,7 +33,7 @@ module Api
         post = post_service.find!(params.require(:post_id))
         raise ActiveRecord::RecordInvalid unless post.public? || private_read?
 
-        like_service.create(params[:post_id])
+        like_service.create_for_post(params[:post_id])
       rescue ActiveRecord::RecordInvalid => e
         if e.message == "Validation failed: Target has already been taken"
           return render_error 409, "Like already exists"

app/controllers/likes_controller.rb

@@ -41,7 +41,12 @@ class LikesController < ApplicationController
   end
 
   def index
-    render json: like_service.find_for_post(params[:post_id])
+    like = if params[:post_id]
+             like_service.find_for_post(params[:post_id])
+           else
+             like_service.find_for_comment(params[:comment_id])
+           end
+    render json: like
       .includes(author: :profile)
       .as_api_response(:backbone)
   end

app/models/user/social_actions.rb

@@ -17,6 +17,10 @@ module User::SocialActions
     end
   end
 
+  def like_comment!(target, opts={})
+    Like::Generator.new(self, target).create!(opts)
+  end
+
   def participate_in_poll!(target, answer, opts={})
     PollParticipation::Generator.new(self, target, answer).create!(opts).tap do
       update_or_create_participation!(target)

app/presenters/comment_presenter.rb

@@ -8,7 +8,8 @@ class CommentPresenter < BasePresenter
       text:             message.plain_text_for_json,
       author:           author.as_api_response(:backbone),
       created_at:       created_at,
-      mentioned_people: mentioned_people.as_api_response(:backbone)
+      mentioned_people: mentioned_people.as_api_response(:backbone),
+      interactions:     build_interactions_json
     }
   end
 
@@ -19,11 +20,25 @@ class CommentPresenter < BasePresenter
       author:           PersonPresenter.new(author).as_api_json,
       created_at:       created_at,
       mentioned_people: build_mentioned_people_json,
-      reported:         current_user.present? && reports.where(user: current_user).exists?
+      reported:         current_user.present? && reports.where(user: current_user).exists?,
+      interactions:     build_interactions_json
+    }
+  end
+
+  def build_interactions_json
+    {
+      likes:       as_api(likes),
+      likes_count: likes_count
     }
   end
 
   def build_mentioned_people_json
     mentioned_people.map {|m| PersonPresenter.new(m).as_api_json }
   end
+
+  def as_api(collection)
+    collection.includes(author: :profile).map {|element|
+      element.as_api_response(:backbone)
+    }
+  end
 end

app/services/comment_service.rb

@@ -14,8 +14,8 @@ class CommentService
     post_service.find!(post_id).comments.for_a_stream
   end
 
-  def find!(comment_guid)
-    Comment.find_by!(guid: comment_guid)
+  def find!(id_or_guid)
+    Comment.find_by!(comment_key(id_or_guid) => id_or_guid)
   end
 
   def destroy(comment_id)
@@ -45,6 +45,11 @@ class CommentService
 
   attr_reader :user
 
+  # We can assume a guid is at least 16 characters long as we have guids set to hex(8) since we started using them.
+  def comment_key(id_or_guid)
+    id_or_guid.to_s.length < 16 ? :id : :guid
+  end
+
   def post_service
     @post_service ||= PostService.new(user)
   end

app/services/like_service.rb

@@ -12,7 +12,8 @@ class LikeService
 
   def create_for_comment(comment_id)
     comment = comment_service.find!(comment_id)
-    user.like!(comment)
+    post_service.find!(comment.commentable_id) # checks implicit for visible posts
+    user.like_comment!(comment)
   end
 
   def destroy(like_id)
@@ -30,6 +31,13 @@ class LikeService
     user ? likes.order(Arel.sql("author_id = #{user.person.id} DESC")) : likes
   end
 
+  def find_for_comment(comment_id)
+    comment = comment_service.find!(comment_id)
+    post_service.find!(comment.post.id) # checks implicit for visible posts
+    likes = comment.likes
+    user ? likes.order(Arel.sql("author_id = #{user.person.id} DESC")) : likes
+  end
+
   def unlike_post(post_id)
     likes = post_service.find!(post_id).likes
     likes = likes.order(Arel.sql("author_id = #{user.person.id} DESC"))
@@ -41,6 +49,17 @@ class LikeService
     end
   end
 
+  def unlike_comment(comment_id)
+    likes = comment_service.find!(comment_id).likes
+    likes = likes.order(Arel.sql("author_id = #{user.person.id} DESC"))
+    if !likes.empty? && user.owns?(likes[0])
+      user.retract(likes[0])
+      true
+    else
+      false
+    end
+  end
+
   private
 
   attr_reader :user

lib/schemas/api_v1.json

@@ -101,9 +101,16 @@
             "type": "array",
             "items": { "$ref": "https://diaspora.software/api/v1/schema.json#/definitions/short_profile" }
           },
-          "reported": { "type": "boolean" }
+          "reported": { "type": "boolean" },
+          "interactions": {
+            "type": "object",
+            "properties" : {
+              "likes" : { "$ref": "https://diaspora.software/api/v1/schema.json#/definitions/likes"},
+              "likes_count" : { "type": "integer"}
+            }
+          }
         },
-        "required": ["guid", "created_at", "author", "body", "reported"],
+        "required": ["guid", "created_at", "author", "body", "reported", "interactions"],
         "additionalProperties": false
       }
     },

spec/integration/api/likes_controller_spec.rb

@@ -61,9 +61,9 @@ describe Api::V1::LikesController do
       end
 
       it "succeeds in getting post with likes" do
-        like_service(bob).create(@status.guid)
-        like_service(auth.user).create(@status.guid)
-        like_service(alice).create(@status.guid)
+        like_service(bob).create_for_post(@status.guid)
+        like_service(auth.user).create_for_post(@status.guid)
+        like_service(alice).create_for_post(@status.guid)
         get(
           api_v1_post_likes_path(post_id: @status.guid),
           params: {access_token: access_token_minimum_scopes}
@@ -112,7 +112,7 @@ describe Api::V1::LikesController do
 
   describe "#create" do
     context "with right post id" do
-      it "succeeeds in liking post" do
+      it "succeeds in liking post" do
         post(
           api_v1_post_likes_path(post_id: @status.guid),
           params: {access_token: access_token}
@@ -181,7 +181,7 @@ describe Api::V1::LikesController do
 
   describe "#delete" do
     before do
-      like_service.create(@status.guid)
+      like_service.create_for_post(@status.guid)
     end
 
     context "with right post id" do
@@ -225,7 +225,7 @@ describe Api::V1::LikesController do
 
     context "with improper credentials" do
       it "fails at unliking private post without private:read" do
-        like_service(auth_public_only.user).create(@private_status.guid)
+        like_service(auth_public_only.user).create_for_post(@private_status.guid)
         delete(
           api_v1_post_likes_path(post_id: @private_status.guid),
           params: {access_token: access_token}
@@ -234,7 +234,7 @@ describe Api::V1::LikesController do
       end
 
       it "fails in unliking post without interactions" do
-        like_service(auth_minimum_scopes.user).create(@status.guid)
+        like_service(auth_minimum_scopes.user).create_for_post(@status.guid)
         delete(
           api_v1_post_likes_path(post_id: @status.guid),
           params: {access_token: access_token_minimum_scopes}

spec/javascripts/jasmine_helpers/factory.js

@@ -43,13 +43,15 @@ var factory = {
 
   comment : function(overrides) {
     var defaultAttrs = {
-      "created_at" : "2012-01-04T00:55:30Z",
-      "author" : this.author(),
-      "guid" : this.guid(),
-      "id" : this.id.next(),
-      "text" : "This is a comment!"
+      "created_at": "2012-01-04T00:55:30Z",
+      "author": this.author(),
+      "guid": this.guid(),
+      "id": this.id.next(),
+      "text": "This is a comment!"
     };
 
+    overrides = overrides || {};
+    overrides.post = this.post();
     return new app.models.Comment(_.extend(defaultAttrs, overrides));
   },
 

spec/presenters/likes_presenter_spec.rb

@@ -10,7 +10,7 @@ describe LikesPresenter do
       to:     "all"
     )
     bobs_like_service = LikeService.new(bob)
-    like = bobs_like_service.create(@status.guid)
+    like = bobs_like_service.create_for_post(@status.guid)
     @presenter = LikesPresenter.new(like, bob)
   end
 

spec/services/like_service_spec.rb

@@ -2,67 +2,129 @@
 
 describe LikeService do
   let(:post) { alice.post(:status_message, text: "hello", to: alice.aspects.first) }
+  let(:alice_comment) { CommentService.new(alice).create(post.id, "This is a wonderful post") }
+  let(:bobs_comment) { CommentService.new(bob).create(post.id, "My post was better than yours") }
 
-  describe "#create" do
+  describe "#create_for_post" do
     it "creates a like on my own post" do
       expect {
-        LikeService.new(alice).create(post.id)
+        LikeService.new(alice).create_for_post(post.id)
       }.not_to raise_error
     end
 
     it "creates a like on a post of a contact" do
       expect {
-        LikeService.new(bob).create(post.id)
+        LikeService.new(bob).create_for_post(post.id)
       }.not_to raise_error
     end
 
     it "attaches the like to the post" do
-      like = LikeService.new(alice).create(post.id)
+      like = LikeService.new(alice).create_for_post(post.id)
       expect(post.likes.first.id).to eq(like.id)
     end
 
     it "fails if the post does not exist" do
       expect {
-        LikeService.new(bob).create("unknown id")
+        LikeService.new(bob).create_for_post("unknown id")
       }.to raise_error ActiveRecord::RecordNotFound
     end
 
     it "fails if the user can't see the post" do
       expect {
-        LikeService.new(eve).create(post.id)
+        LikeService.new(eve).create_for_post(post.id)
       }.to raise_error ActiveRecord::RecordNotFound
     end
 
     it "fails if the user already liked the post" do
-      LikeService.new(alice).create(post.id)
+      LikeService.new(alice).create_for_post(post.id)
       expect {
-        LikeService.new(alice).create(post.id)
+        LikeService.new(alice).create_for_post(post.id)
+      }.to raise_error ActiveRecord::RecordInvalid
+    end
+  end
+
+  describe "#create_for_comment" do
+    it "creates a like on a posts comment" do
+      expect {
+        LikeService.new(alice).create_for_comment(alice_comment.id)
+      }.not_to raise_error
+    end
+
+    it "creates a like on someone else comment" do
+      expect {
+        LikeService.new(alice).create_for_comment(bobs_comment.id)
+      }.not_to raise_error
+    end
+
+    it "attaches the like to the comment" do
+      like = LikeService.new(alice).create_for_comment(bobs_comment.id)
+      expect(bobs_comment.likes.first.id).to eq(like.id)
+    end
+
+    it "fails if comment does not exist" do
+      expect {
+        LikeService.new(alice).create_for_comment("unknown_id")
+      }.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    it "fails if user cant see post and its comments" do
+      expect {
+        LikeService.new(eve).create_for_comment(bobs_comment.id)
+      }.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    it "fails if user already liked the comment" do
+      LikeService.new(alice).create_for_comment(bobs_comment.id)
+      expect {
+        LikeService.new(alice).create_for_comment(bobs_comment.id)
       }.to raise_error ActiveRecord::RecordInvalid
     end
   end
 
   describe "#destroy" do
-    let(:like) { LikeService.new(bob).create(post.id) }
+    context "for post like" do
+      let(:like) { LikeService.new(bob).create_for_post(post.id) }
 
-    it "lets the user destroy their own like" do
-      result = LikeService.new(bob).destroy(like.id)
-      expect(result).to be_truthy
+      it "lets the user destroy their own like" do
+        result = LikeService.new(bob).destroy(like.id)
+        expect(result).to be_truthy
+      end
+
+      it "doesn't let the parent author destroy others likes" do
+        result = LikeService.new(alice).destroy(like.id)
+        expect(result).to be_falsey
+      end
+
+      it "doesn't let someone destroy others likes" do
+        result = LikeService.new(eve).destroy(like.id)
+        expect(result).to be_falsey
+      end
+
+      it "fails if the like doesn't exist" do
+        expect {
+          LikeService.new(bob).destroy("unknown id")
+        }.to raise_error ActiveRecord::RecordNotFound
+      end
     end
 
-    it "doesn't let the parent author destroy others likes" do
-      result = LikeService.new(alice).destroy(like.id)
-      expect(result).to be_falsey
-    end
+    context "for comment like" do
+      let(:like) { LikeService.new(bob).create_for_comment(alice_comment.id) }
 
-    it "doesn't let someone destroy others likes" do
-      result = LikeService.new(eve).destroy(like.id)
-      expect(result).to be_falsey
-    end
+      it "let the user destroy its own comment like" do
+        result = LikeService.new(bob).destroy(like.id)
+        expect(result).to be_truthy
+      end
 
-    it "fails if the like doesn't exist" do
-      expect {
-        LikeService.new(bob).destroy("unknown id")
-      }.to raise_error ActiveRecord::RecordNotFound
+      it "doesn't let the parent author destroy other comment likes" do
+        result = LikeService.new(alice).destroy(like.id)
+        expect(result).to be_falsey
+      end
+
+      it "fails if the like doesn't exist" do
+        expect {
+          LikeService.new(alice).destroy("unknown id")
+        }.to raise_error ActiveRecord::RecordNotFound
+      end
     end
   end
 
@@ -70,17 +132,17 @@ describe LikeService do
     context "with user" do
       it "returns likes for a public post" do
         post = alice.post(:status_message, text: "hello", public: true)
-        like = LikeService.new(alice).create(post.id)
+        like = LikeService.new(alice).create_for_post(post.id)
         expect(LikeService.new(eve).find_for_post(post.id)).to include(like)
       end
 
       it "returns likes for a visible private post" do
-        like = LikeService.new(alice).create(post.id)
+        like = LikeService.new(alice).create_for_post(post.id)
         expect(LikeService.new(bob).find_for_post(post.id)).to include(like)
       end
 
       it "doesn't return likes for a private post the user can not see" do
-        LikeService.new(alice).create(post.id)
+        LikeService.new(alice).create_for_post(post.id)
         expect {
           LikeService.new(eve).find_for_post(post.id)
         }.to raise_error ActiveRecord::RecordNotFound
@@ -88,7 +150,7 @@ describe LikeService do
 
       it "returns the user's like first" do
         post = alice.post(:status_message, text: "hello", public: true)
-        [alice, bob, eve].map {|user| LikeService.new(user).create(post.id) }
+        [alice, bob, eve].map {|user| LikeService.new(user).create_for_post(post.id) }
 
         [alice, bob, eve].each do |user|
           expect(
@@ -101,12 +163,12 @@ describe LikeService do
     context "without user" do
       it "returns likes for a public post" do
         post = alice.post(:status_message, text: "hello", public: true)
-        like = LikeService.new(alice).create(post.id)
+        like = LikeService.new(alice).create_for_post(post.id)
         expect(LikeService.new.find_for_post(post.id)).to include(like)
       end
 
       it "doesn't return likes a for private post" do
-        LikeService.new(alice).create(post.id)
+        LikeService.new(alice).create_for_post(post.id)
         expect {
           LikeService.new.find_for_post(post.id)
         }.to raise_error Diaspora::NonPublic
@@ -115,15 +177,68 @@ describe LikeService do
 
     it "returns all likes of a post" do
       post = alice.post(:status_message, text: "hello", public: true)
-      likes = [alice, bob, eve].map {|user| LikeService.new(user).create(post.id) }
+      likes = [alice, bob, eve].map {|user| LikeService.new(user).create_for_post(post.id) }
 
       expect(LikeService.new.find_for_post(post.id)).to match_array(likes)
     end
   end
 
+  describe "#find_for_comment" do
+    context "with user" do
+      it "returns likes for a public post comment" do
+        post = alice.post(:status_message, text: "hello", public: true)
+        comment = CommentService.new(bob).create(post.id, "Hello comment")
+        like = LikeService.new(alice).create_for_comment(comment.id)
+        expect(LikeService.new(eve).find_for_comment(comment.id)).to include(like)
+      end
+
+      it "returns likes for visible private post comments" do
+        comment = CommentService.new(bob).create(post.id, "Hello comment")
+        like = LikeService.new(alice).create_for_comment(comment.id)
+        expect(LikeService.new(bob).find_for_comment(comment.id)).to include(like)
+      end
+
+      it "doesn't return likes for a posts comment the user can not see" do
+        expect {
+          LikeService.new(eve).find_for_comment(alice_comment.id)
+        }.to raise_error ActiveRecord::RecordNotFound
+      end
+
+      it "returns the user's like first" do
+        post = alice.post(:status_message, text: "hello", public: true)
+        comment = CommentService.new(alice).create(post.id, "I like my own post")
+
+        [alice, bob, eve].map {|user| LikeService.new(user).create_for_comment(comment.id) }
+        [alice, bob, eve].each do |user|
+          expect(
+            LikeService.new(user).find_for_comment(comment.id).first.author.id
+          ).to be user.person.id
+        end
+      end
+    end
+
+    context "without user" do
+      it "returns likes for a comment on a public post" do
+        post = alice.post(:status_message, text: "hello", public: true)
+        comment = CommentService.new(bob).create(post.id, "I like my own post")
+        like = LikeService.new(alice).create_for_comment(comment.id)
+        expect(
+          LikeService.new.find_for_comment(comment.id)
+        ).to include(like)
+      end
+
+      it "doesn't return likes for a private post comment" do
+        LikeService.new(alice).create_for_comment(alice_comment.id)
+        expect {
+          LikeService.new.find_for_comment(alice_comment.id)
+        }.to raise_error Diaspora::NonPublic
+      end
+    end
+  end
+
   describe "#unlike_post" do
     before do
-      LikeService.new(alice).create(post.id)
+      LikeService.new(alice).create_for_post(post.id)
     end
 
     it "removes the like to the post" do
@@ -131,4 +246,16 @@ describe LikeService do
       expect(post.likes.length).to eq(0)
     end
   end
+
+  describe "#unlike_comment" do
+    it "removes the like for a comment" do
+      comment = CommentService.new(alice).create(post.id, "I like my own post")
+      LikeService.new(alice).create_for_comment(comment.id)
+      expect(comment.likes.length).to eq(1)
+
+      LikeService.new(alice).unlike_comment(comment.id)
+      comment = CommentService.new(alice).find!(comment.id)
+      expect(comment.likes.length).to eq(0)
+    end
+  end
 end