Improve invalidation of stored service password if the endpoint URL is changed

Password can now be specified at the same time as the new URL, and the service
template admin pages now work.

app/controllers/admin/services_controller.rb

@@ -39,7 +39,13 @@ class Admin::ServicesController < Admin::ApplicationController
   end
 
   def application_services_params
-    params.permit(:id,
+    application_services_params = params.permit(:id,
       service: Projects::ServicesController::ALLOWED_PARAMS)
+    if application_services_params[:service].is_a?(Hash)
+      Projects::ServicesController::FILTER_BLANK_PARAMS.each do |param|
+        application_services_params[:service].delete(param) if application_services_params[:service][param].blank? 
+      end
+    end
+    application_services_params
   end
 end

app/controllers/projects/services_controller.rb

@@ -9,6 +9,10 @@ class Projects::ServicesController < Projects::ApplicationController
                     :note_events, :send_from_committer_email, :disable_diffs, :external_wiki_url,
                     :notify, :color,
                     :server_host, :server_port, :default_irc_uri, :enable_ssl_verification]
+
+  # Parameters to ignore if no value is specified
+  FILTER_BLANK_PARAMS = [:password]
+  
   # Authorize
   before_action :authorize_admin_project!
   before_action :service, only: [:edit, :update, :test]
@@ -59,7 +63,9 @@ class Projects::ServicesController < Projects::ApplicationController
 
   def service_params
     service_params = params.require(:service).permit(ALLOWED_PARAMS)
-    service_params.delete("password") if service_params["password"].blank?
+    FILTER_BLANK_PARAMS.each do |param|
+      service_params.delete(param) if service_params[param].blank?
+    end
     service_params
   end
 end

app/models/project_services/bamboo_service.rb

@@ -48,7 +48,7 @@ class BambooService < CiService
   end
 
   def reset_password
-    if prop_updated?(:bamboo_url)
+    if bamboo_url_changed? && !password_touched?
       self.password = nil
     end
   end

app/models/project_services/teamcity_service.rb

@@ -45,7 +45,7 @@ class TeamcityService < CiService
   end
 
   def reset_password
-    if prop_updated?(:teamcity_url)
+    if teamcity_url_changed? && !password_touched?
       self.password = nil
     end
   end

app/models/service.rb

@@ -33,6 +33,8 @@ class Service < ActiveRecord::Base
 
   after_initialize :initialize_properties
 
+  after_commit :reset_updated_properties
+
   belongs_to :project
   has_one :service_hook
 
@@ -103,6 +105,7 @@ class Service < ActiveRecord::Base
 
   # Provide convenient accessor methods
   # for each serialized property.
+  # Also keep track of updated properties in a similar way as ActiveModel::Dirty
   def self.prop_accessor(*args)
     args.each do |arg|
       class_eval %{
@@ -111,19 +114,37 @@ class Service < ActiveRecord::Base
         end
 
         def #{arg}=(value)
+          updated_properties['#{arg}'] = #{arg} unless #{arg}_changed?
           self.properties['#{arg}'] = value
         end
+
+        def #{arg}_changed?
+          #{arg}_touched? && #{arg} != #{arg}_was
+        end
+
+        def #{arg}_touched?
+          updated_properties.include?('#{arg}')
+        end
+
+        def #{arg}_was
+          updated_properties['#{arg}']
+        end
       }
     end
   end
 
-  # ActiveRecord does not provide a mechanism to track changes in serialized keys.
-  # This is why we need to perform extra query to do it mannually.
-  def prop_updated?(prop_name)
-    relation_name = self.type.underscore
-    previous_value = project.send(relation_name).send(prop_name)
-    return false if previous_value.nil?
-    previous_value != send(prop_name)
+  # Returns a hash of the properties that have been assigned a new value since last save,
+  # indicating their original values (attr => original value).
+  # ActiveRecord does not provide a mechanism to track changes in serialized keys, 
+  # so we need a specific implementation for service properties.
+  # This allows to track changes to properties set with the accessor methods,
+  # but not direct manipulation of properties hash.
+  def updated_properties
+    @updated_properties ||= ActiveSupport::HashWithIndifferentAccess.new
+  end
+
+  def reset_updated_properties
+    @updated_properties = nil
   end
   
   def async_execute(data)

spec/models/project_services/bamboo_service_spec.rb

@@ -30,6 +30,7 @@ describe BambooService, models: true do
     let(:user)    { create(:user) }
     let(:project) { create(:project) }
 
+    context "when a password was previously set" do
       before do
         @bamboo_service = BambooService.create(
           project: create(:project),
@@ -52,5 +53,42 @@ describe BambooService, models: true do
         @bamboo_service.save
         expect(@bamboo_service.password).to eq("password")
       end
+
+      it "does not reset password if new url is set together with password, even if it's the same password" do
+        @bamboo_service.bamboo_url = 'http://gitlab_edited.com'
+        @bamboo_service.password = 'password'
+        @bamboo_service.save
+        expect(@bamboo_service.password).to eq("password")
+        expect(@bamboo_service.bamboo_url).to eq("http://gitlab_edited.com")
+      end
+
+      it "should reset password if url changed, even if setter called multiple times" do
+        @bamboo_service.bamboo_url = 'http://gitlab1.com'
+        @bamboo_service.bamboo_url = 'http://gitlab1.com'
+        @bamboo_service.save
+        expect(@bamboo_service.password).to be_nil
+      end
+    end
+    
+    context "when no password was previously set" do
+      before do
+        @bamboo_service = BambooService.create(
+          project: create(:project),
+          properties: {
+            bamboo_url: 'http://gitlab.com',
+            username: 'mic'
+          }
+        )
+      end
+
+      it "saves password if new url is set together with password" do
+        @bamboo_service.bamboo_url = 'http://gitlab_edited.com'
+        @bamboo_service.password = 'password'
+        @bamboo_service.save
+        expect(@bamboo_service.password).to eq("password")
+        expect(@bamboo_service.bamboo_url).to eq("http://gitlab_edited.com")
+      end
+
+    end
   end
 end

spec/models/project_services/teamcity_service_spec.rb

@@ -30,6 +30,7 @@ describe TeamcityService, models: true do
     let(:user)    { create(:user) }
     let(:project) { create(:project) }
 
+    context "when a password was previously set" do
       before do
         @teamcity_service = TeamcityService.create(
           project: create(:project),
@@ -52,5 +53,41 @@ describe TeamcityService, models: true do
         @teamcity_service.save
         expect(@teamcity_service.password).to eq("password")
       end
+
+      it "does not reset password if new url is set together with password, even if it's the same password" do
+        @teamcity_service.teamcity_url = 'http://gitlab_edited.com'
+        @teamcity_service.password = 'password'
+        @teamcity_service.save
+        expect(@teamcity_service.password).to eq("password")
+        expect(@teamcity_service.teamcity_url).to eq("http://gitlab_edited.com")
+      end
+
+      it "should reset password if url changed, even if setter called multiple times" do
+        @teamcity_service.teamcity_url = 'http://gitlab1.com'
+        @teamcity_service.teamcity_url = 'http://gitlab1.com'
+        @teamcity_service.save
+        expect(@teamcity_service.password).to be_nil
+      end
+    end
+    
+    context "when no password was previously set" do
+      before do
+        @teamcity_service = TeamcityService.create(
+          project: create(:project),
+          properties: {
+            teamcity_url: 'http://gitlab.com',
+            username: 'mic'
+          }
+        )
+      end
+
+      it "saves password if new url is set together with password" do
+        @teamcity_service.teamcity_url = 'http://gitlab_edited.com'
+        @teamcity_service.password = 'password'
+        @teamcity_service.save
+        expect(@teamcity_service.password).to eq("password")
+        expect(@teamcity_service.teamcity_url).to eq("http://gitlab_edited.com")
+      end
+    end
   end
 end

spec/models/service_spec.rb

@@ -104,7 +104,7 @@ describe Service do
     end
   end
 
-  describe "#prop_updated?" do
+  describe "{property}_changed?" do
     let(:service) do
       BambooService.create(
         project: create(:project),
@@ -116,14 +116,112 @@ describe Service do
       )
     end
 
-    it "returns false" do
+    it "returns false when the property has not been assigned a new value" do
       service.username = "key_changed"
-      expect(service.prop_updated?(:bamboo_url)).to be_falsy
+      expect(service.bamboo_url_changed?).to be_falsy
     end
 
-    it "returns true" do
-      service.bamboo_url = "http://other.com"
-      expect(service.prop_updated?(:bamboo_url)).to be_truthy
+    it "returns true when the property has been assigned a different value" do
+      service.bamboo_url = "http://example.com"
+      expect(service.bamboo_url_changed?).to be_truthy
+    end
+
+    it "returns true when the property has been assigned a different value twice" do
+      service.bamboo_url = "http://example.com"
+      service.bamboo_url = "http://example.com"
+      expect(service.bamboo_url_changed?).to be_truthy
+    end
+
+    it "returns false when the property has been re-assigned the same value" do
+      service.bamboo_url = 'http://gitlab.com'
+      expect(service.bamboo_url_changed?).to be_falsy
+    end
+
+    it "returns false when the property has been assigned a new value then saved" do
+      service.bamboo_url = 'http://example.com'
+      service.save
+      expect(service.bamboo_url_changed?).to be_falsy
+    end
+  end
+
+  describe "{property}_touched?" do
+    let(:service) do
+      BambooService.create(
+        project: create(:project),
+        properties: {
+          bamboo_url: 'http://gitlab.com',
+          username: 'mic',
+          password: "password"
+        }
+      )
+    end
+
+    it "returns false when the property has not been assigned a new value" do
+      service.username = "key_changed"
+      expect(service.bamboo_url_touched?).to be_falsy
+    end
+
+    it "returns true when the property has been assigned a different value" do
+      service.bamboo_url = "http://example.com"
+      expect(service.bamboo_url_touched?).to be_truthy
+    end
+
+    it "returns true when the property has been assigned a different value twice" do
+      service.bamboo_url = "http://example.com"
+      service.bamboo_url = "http://example.com"
+      expect(service.bamboo_url_touched?).to be_truthy
+    end
+
+    it "returns true when the property has been re-assigned the same value" do
+      service.bamboo_url = 'http://gitlab.com'
+      expect(service.bamboo_url_touched?).to be_truthy
+    end
+
+    it "returns false when the property has been assigned a new value then saved" do
+      service.bamboo_url = 'http://example.com'
+      service.save
+      expect(service.bamboo_url_changed?).to be_falsy
+    end
+  end
+
+  describe "{property}_was" do
+    let(:service) do
+      BambooService.create(
+        project: create(:project),
+        properties: {
+          bamboo_url: 'http://gitlab.com',
+          username: 'mic',
+          password: "password"
+        }
+      )
+    end
+
+
+    it "returns nil when the property has not been assigned a new value" do
+      service.username = "key_changed"
+      expect(service.bamboo_url_was).to be_nil
+    end
+
+    it "returns the previous value when the property has been assigned a different value" do
+      service.bamboo_url = "http://example.com"
+      expect(service.bamboo_url_was).to eq('http://gitlab.com')
+    end
+
+    it "returns initial value when the property has been re-assigned the same value" do
+      service.bamboo_url = 'http://gitlab.com'
+      expect(service.bamboo_url_was).to eq('http://gitlab.com')
+    end
+
+    it "returns initial value when the property has been assigned multiple values" do
+      service.bamboo_url = "http://example.com"
+      service.bamboo_url = "http://example2.com"
+      expect(service.bamboo_url_was).to eq('http://gitlab.com')
+    end
+
+    it "returns nil when the property has been assigned a new value then saved" do
+      service.bamboo_url = 'http://example.com'
+      service.save
+      expect(service.bamboo_url_was).to be_nil
     end
   end
 end