Unregister forum membership at Discourse Hub when deleting a user

lib/discourse_hub.rb

@@ -6,13 +6,13 @@ module DiscourseHub
   class NicknameUnavailable < RuntimeError; end
 
   def self.nickname_available?(nickname)
-    response = get('/users/nickname_available', {nickname: nickname})
-    [response['available'], response['suggestion']]
+    json = get('/users/nickname_available', {nickname: nickname})
+    [json['available'], json['suggestion']]
   end
 
   def self.nickname_match?(nickname, email)
-    response = get('/users/nickname_match', {nickname: nickname, email: email})
-    [response['match'], response['available'] || false, response['suggestion']]
+    json = get('/users/nickname_match', {nickname: nickname, email: email})
+    [json['match'], json['available'] || false, json['suggestion']]
   end
 
   def self.register_nickname(nickname, email)
@@ -24,6 +24,11 @@ module DiscourseHub
     end
   end
 
+  def self.unregister_nickname(nickname)
+    json = delete('/memberships/' + nickname)
+    json.has_key?('success')
+  end
+
   def self.change_nickname(current_nickname, new_nickname)
     json = put("/users/#{current_nickname}/nickname", {nickname: new_nickname})
     if json.has_key?('success')
@@ -46,18 +51,27 @@ module DiscourseHub
   private
 
   def self.get(rel_url, params={})
-    response = RestClient.get( "#{hub_base_url}#{rel_url}", {params: {access_token: access_token}.merge(params), accept: accepts } )
-    JSON.parse(response)
+    singular_action :get, rel_url, params
   end
 
   def self.post(rel_url, params={})
-    response = RestClient.post( "#{hub_base_url}#{rel_url}", {access_token: access_token}.merge(params), content_type: :json, accept: accepts )
-    JSON.parse(response)
+    collection_action :post, rel_url, params
   end
 
   def self.put(rel_url, params={})
-    response = RestClient.put( "#{hub_base_url}#{rel_url}", {access_token: access_token}.merge(params), content_type: :json, accept: accepts )
-    JSON.parse(response)
+    collection_action :put, rel_url, params
+  end
+
+  def self.delete(rel_url, params={})
+    singular_action :delete, rel_url, params
+  end
+
+  def self.singular_action(action, rel_url, params={})
+    JSON.parse RestClient.send(action, "#{hub_base_url}#{rel_url}", {params: {access_token: access_token}.merge(params), accept: accepts } )
+  end
+
+  def self.collection_action(action, rel_url, params={})
+    JSON.parse RestClient.send(action, "#{hub_base_url}#{rel_url}", {access_token: access_token}.merge(params), content_type: :json, accept: accepts )
   end
 
   def self.hub_base_url

lib/user_destroyer.rb

@@ -20,6 +20,7 @@ class UserDestroyer
       user.destroy.tap do |u|
         if u
           AdminLogger.new(@admin).log_user_deletion(user)
+          DiscourseHub.unregister_nickname(user.username)
           MessageBus.publish "/file-change", ["refresh"], user_ids: [user.id]
         end
       end

spec/components/discourse_hub_spec.rb

@@ -55,6 +55,18 @@ describe DiscourseHub do
     end
   end
 
+  describe '#unregister_nickname' do
+    it 'should return true when unregister succeeds' do
+      RestClient.stubs(:delete).returns( {success: 'OK'}.to_json )
+      DiscourseHub.unregister_nickname('byebye').should be_true
+    end
+
+    it 'should return false when unregister fails' do
+      RestClient.stubs(:delete).returns( {failed: -20}.to_json )
+      DiscourseHub.unregister_nickname('byebye').should be_false
+    end
+  end
+
   describe '#discourse_version_check' do
     it 'should return just return the json that the hub returns' do
       hub_response = {'success' => 'OK', 'latest_version' => '0.8.1', 'critical_updates' => false}

spec/components/user_destroyer_spec.rb

@@ -2,6 +2,11 @@ require 'spec_helper'
 require_dependency 'user_destroyer'
 
 describe UserDestroyer do
+
+  before do
+    RestClient.stubs(:delete).returns( {success: 'OK'}.to_json )
+  end
+
   describe 'new' do
     it 'raises an error when user is nil' do
       expect { UserDestroyer.new(nil) }.to raise_error(Discourse::InvalidParameters)
@@ -57,6 +62,11 @@ describe UserDestroyer do
         AdminLogger.any_instance.expects(:log_user_deletion).never
         destroy rescue nil
       end
+
+      it 'should not unregister the user at the discourse hub' do
+        DiscourseHub.expects(:unregister_nickname).never
+        destroy rescue nil
+      end
     end
 
     context 'user has no posts' do
@@ -75,6 +85,11 @@ describe UserDestroyer do
           AdminLogger.any_instance.expects(:log_user_deletion).with(@user).once
           destroy
         end
+
+        it 'should unregister the nickname as the discourse hub' do
+          DiscourseHub.expects(:unregister_nickname).with(@user.username)
+          destroy
+        end
       end
 
       context 'and destroy fails' do
@@ -90,6 +105,11 @@ describe UserDestroyer do
           AdminLogger.any_instance.expects(:log_user_deletion).never
           destroy
         end
+
+        it 'should not unregister the user at the discourse hub' do
+          DiscourseHub.expects(:unregister_nickname).never
+          destroy rescue nil
+        end
       end
     end
   end