Return a consistent not found message

This prevents leakage of project names on an endpoint which is
unauthenticated and thus open to the world.

app/models/project.rb

@@ -77,7 +77,7 @@ class Project < ActiveRecord::Base
 
   has_one :last_event, -> {order 'events.created_at DESC'}, class_name: 'Event'
   has_many :boards, before_add: :validate_board_limit, dependent: :destroy
-  has_many :chat_services, dependent: :destroy
+  has_many :chat_services
 
   # Project services
   has_one :campfire_service, dependent: :destroy

db/schema.rb

@@ -98,14 +98,14 @@ ActiveRecord::Schema.define(version: 20161113184239) do
     t.text "help_page_text_html"
     t.text "shared_runners_text_html"
     t.text "after_sign_up_text_html"
-    t.boolean "sidekiq_throttling_enabled", default: false
-    t.string "sidekiq_throttling_queues"
-    t.decimal "sidekiq_throttling_factor"
     t.boolean "housekeeping_enabled", default: true, null: false
     t.boolean "housekeeping_bitmaps_enabled", default: true, null: false
     t.integer "housekeeping_incremental_repack_period", default: 10, null: false
     t.integer "housekeeping_full_repack_period", default: 50, null: false
     t.integer "housekeeping_gc_period", default: 200, null: false
+    t.boolean "sidekiq_throttling_enabled", default: false
+    t.string "sidekiq_throttling_queues"
+    t.decimal "sidekiq_throttling_factor"
   end
 
   create_table "audit_events", force: :cascade do |t|
@@ -384,6 +384,17 @@ ActiveRecord::Schema.define(version: 20161113184239) do
 
   add_index "ci_variables", ["gl_project_id"], name: "index_ci_variables_on_gl_project_id", using: :btree
 
+  create_table "custom_emoji", force: :cascade do |t|
+    t.integer "project_id", null: false
+    t.string "name"
+    t.string "emoji"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
+  add_index "custom_emoji", ["project_id", "name"], name: "index_custom_emoji_on_project_id_and_name", unique: true, using: :btree
+  add_index "custom_emoji", ["project_id"], name: "index_custom_emoji_on_project_id", using: :btree
+
   create_table "deploy_keys_projects", force: :cascade do |t|
     t.integer "deploy_key_id", null: false
     t.integer "project_id", null: false
@@ -930,7 +941,7 @@ ActiveRecord::Schema.define(version: 20161113184239) do
     t.boolean "has_external_wiki"
     t.boolean "lfs_enabled"
     t.text "description_html"
-    t.boolean "only_allow_merge_if_all_discussions_are_resolved"
+    t.boolean "only_allow_merge_if_all_discussions_are_resolved", default: false, null: false
   end
 
   add_index "projects", ["ci_id"], name: "index_projects_on_ci_id", using: :btree
@@ -1254,6 +1265,7 @@ ActiveRecord::Schema.define(version: 20161113184239) do
   add_index "web_hooks", ["project_id"], name: "index_web_hooks_on_project_id", using: :btree
 
   add_foreign_key "boards", "projects"
+  add_foreign_key "custom_emoji", "projects"
   add_foreign_key "issue_metrics", "issues", on_delete: :cascade
   add_foreign_key "label_priorities", "labels", on_delete: :cascade
   add_foreign_key "label_priorities", "projects", on_delete: :cascade

lib/api/services.rb

@@ -67,7 +67,8 @@ module API
       post ':id/services/:service_slug/trigger' do
         project = Project.find_with_namespace(params[:id]) || Project.find_by(id: params[:id])
 
-        not_found! unless project
+        # This is not accurate, but done to prevent leakage of the project names
+        not_found!('Service') unless project
 
         service = project_service(project)
 
@@ -77,7 +78,7 @@ module API
           status result[:status] || 200
           present result
         else
-          not_found!
+          not_found!('Service')
         end
       end
     end

lib/mattermost/presenter.rb

@@ -14,8 +14,8 @@ module Mattermost
       end
 
       def help(commands, trigger)
-        if commands.empty?
-          ephemeral_response("No commands configured") unless messages.count > 1
+        if commands.zero?
+          ephemeral_response("No commands configured")
         else
           message = header_with_list("Available commands", commands)
 

spec/models/project_spec.rb

@@ -20,7 +20,7 @@ describe Project, models: true do
     it { is_expected.to have_many(:deploy_keys) }
     it { is_expected.to have_many(:hooks).dependent(:destroy) }
     it { is_expected.to have_many(:protected_branches).dependent(:destroy) }
-    it { is_expected.to have_many(:chat_services).dependent(:destroy) }
+    it { is_expected.to have_many(:chat_services) }
     it { is_expected.to have_one(:forked_project_link).dependent(:destroy) }
     it { is_expected.to have_one(:slack_service).dependent(:destroy) }
     it { is_expected.to have_one(:pushover_service).dependent(:destroy) }

spec/requests/api/services_spec.rb

@@ -95,9 +95,10 @@ describe API::API, api: true  do
 
     context 'no service is available' do
       it 'returns a not found message' do
-        post api("/projects/#{project.id}/services/mattermost_command/trigger")
+        post api("/projects/#{project.id}/services/idonotexist/trigger")
 
         expect(response).to have_http_status(404)
+        expect(json_response["message"]).to eq("404 Service Not Found")
       end
     end
 
@@ -139,7 +140,7 @@ describe API::API, api: true  do
           post api("/projects/404/services/mattermost_command/trigger"), params
 
           expect(response).to have_http_status(404)
-          expect(json_response["message"]).to eq '404 Not Found'
+          expect(json_response["message"]).to eq("404 Service Not Found")
         end
       end
     end