smiles!!!

app/assets/javascripts/application.js.erb.coffee

@@ -112,12 +112,54 @@ $(document).on "click", "button[name=ab-destroy]", ->
     complete: (jqxhr, status) ->
       btn.button "reset"
 
+$(document).on "click", "button[name=ab-smile]", ->
+  btn = $(this)
+  aid = btn[0].dataset.aId
+  action = btn[0].dataset.action
+  count = Number $("span#ab-smile-count-#{aid}").html()
+  btn[0].dataset.loadingText = "<i class=\"fa fa-meh-o fa-spin\"></i>"
+  btn.button "loading"
+
+  target_url = switch action
+    when 'smile'
+      count++
+      '/ajax/create_smile'
+    when 'unsmile'
+      count--
+      '/ajax/destroy_smile'
+
+  success = false
+
+  $.ajax
+    url: target_url
+    type: 'POST'
+    data:
+      id: aid
+    success: (data, status, jqxhr) ->
+      success = data.success
+      if success
+        $("span#ab-smile-count-#{aid}").html(count)
+      showNotification data.message, data.success
+    error: (jqxhr, status, error) ->
+      console.log jqxhr, status, error
+      showNotification "An error occurred, a developer should check the console for details", false
+    complete: (jqxhr, status) ->
+      btn.button "reset"
+      if success
+        switch action
+          when 'smile'
+            btn[0].dataset.action = 'unsmile'
+            btn.html "<i class=\"fa fa-frown-o\"></i>"
+          when 'unsmile'
+            btn[0].dataset.action = 'smile'
+            btn.html "<i class=\"fa fa-smile-o\"></i>"
+
 $(document).on "click", "button[name=user-action]", ->
   btn = $(this)
   btn.button "loading"
   target = btn[0].dataset.target
   action = btn[0].dataset.action
-  count = Number($("h4.entry-text#follower-count").html())
+  count = Number $("h4.entry-text#follower-count").html()
 
   target_url = switch action
     when 'follow'

app/controllers/ajax/smile_controller.rb

@@ -0,0 +1,39 @@
+class Ajax::SmileController < ApplicationController
+  def create
+    params.require :id
+
+    answer = Answer.find(params[:id])
+
+    begin
+      current_user.smile answer
+    rescue
+      @status = :fail
+      @message = "You have already smiled that answer."
+      @success = false
+      return
+    end
+
+    @status = :okay
+    @message = "Successfully smiled answer."
+    @success = true
+  end
+
+  def destroy
+    params.require :id
+
+    answer = Answer.find(params[:id])
+
+    begin
+      current_user.unsmile answer
+    rescue
+      @status = :fail
+      @message = "You have not smiled that answer."
+      @success = false
+      return
+    end
+
+    @status = :okay
+    @message = "Successfully unsmiled answer."
+    @success = true
+  end
+end

app/models/user.rb

@@ -19,6 +19,7 @@ class User < ActiveRecord::Base
                                    dependent: :destroy
   has_many :friends,   through: :active_relationships, source: :target
   has_many :followers, through: :passive_relationships, source: :source
+  has_many :smiles
 
   SCREEN_NAME_REGEX = /\A[a-zA-Z0-9_]{1,16}\z/
 
@@ -66,7 +67,7 @@ class User < ActiveRecord::Base
     target_user.decrement! :follower_count
   end
 
-  # @return [Boolean] true if +current_user+ is following +target_user+
+  # @return [Boolean] true if +self+ is following +target_user+
   def following?(target_user)
     friends.include? target_user
   end
@@ -86,4 +87,10 @@ class User < ActiveRecord::Base
     decrement! :smiled_count
     answer.decrement! :smile_count
   end
+
+  def smiled?(answer)
+    # TODO: you know what to do here, nilsding
+    answer.smiles.each { |s| return true if s.user_id == self.id }
+    false
+  end
 end

app/views/ajax/smile/create.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'ajax/shared/status'

app/views/ajax/smile/destroy.json.jbuilder

@@ -0,0 +1 @@
+json.partial! 'ajax/shared/status'

app/views/shared/_answerbox.html.haml

@@ -17,9 +17,16 @@
             %img.img-rounded.img-answerbox-small{src: gravatar_url(a.user)}
             %span= a.user.screen_name
         .col-md-6.col-sm-8.col-xs-5.text-right
-          %span.hidden-xs.text-muted x users smiled at this
-          %a.btn.btn-info.btn-sm
-            %i.fa.fa-smile-o
+          %span.hidden-xs.text-muted
+            %span{id: "ab-smile-count-#{a.id}"}= a.smile_count
+            users smiled this
+          - if user_signed_in?
+            - if current_user.smiled? a
+              %button.btn.btn-info.btn-sm{type: :button, name: 'ab-smile', 'data-a-id' => a.id, 'data-action' => 'unsmile'}
+                %i.fa.fa-frown-o
+            - else
+              %button.btn.btn-info.btn-sm{type: :button, name: 'ab-smile', 'data-a-id' => a.id, 'data-action' => 'smile'}
+                %i.fa.fa-smile-o
           %a.btn.btn-primary.btn-sm
             %i.fa.fa-comments
           - if privileged? a.user

config/routes.rb

@@ -30,6 +30,8 @@ Rails.application.routes.draw do
     match '/destroy_answer', to: 'answer#destroy', via: :post, as: :destroy_answer
     match '/create_friend', to: 'friend#create', via: :post, as: :create_friend
     match '/destroy_friend', to: 'friend#destroy', via: :post, as: :destroy_friend
+    match '/create_smile', to: 'smile#create', via: :post, as: :create_smile
+    match '/destroy_smile', to: 'smile#destroy', via: :post, as: :destroy_smile
   end
 
   match '/inbox', to: 'inbox#show', via: 'get'