moved fork checks into policies

app/policies/global_policy.rb

@@ -11,6 +11,8 @@ class GlobalPolicy < BasePolicy
   with_options scope: :user, score: 0
   condition(:access_locked) { @user.access_locked? }
+  condition(:can_create_fork, scope: :user) { @user.manageable_namespaces.any? { |namespace| @user.can?(:create_projects, namespace) } }
+
   rule { anonymous }.policy do
     prevent :log_in
     prevent :access_api
@@ -40,6 +42,10 @@ class GlobalPolicy < BasePolicy
     enable :create_group
   end
+  rule { can_create_fork }.policy do
+    enable :create_fork
+  end
+
   rule { access_locked }.policy do
     prevent :log_in
   end

app/policies/namespace_policy.rb

 class NamespacePolicy < BasePolicy
   rule { anonymous }.prevent_all
+  condition(:personal_project, scope: :subject) { @subject.kind == 'user' }
+  condition(:can_create_personal_project, scope: :user) { @user.can_create_project? }
   condition(:owner) { @subject.owner == @user }
   rule { owner | admin }.policy do
     enable :create_projects
     enable :admin_namespace
   end
+
+  rule { personal_project & ~can_create_personal_project }.prevent :create_projects
 end

app/views/projects/buttons/_fork.html.haml

@@ -5,10 +5,10 @@
         = custom_icon('icon_fork')
         %span= s_('GoToYourFork|Fork')
     - else
-      - can_fork = current_user.can_create_project? || current_user.manageable_namespaces.count > 1
+      - can_create_fork = current_user.can?(:create_fork)
       = link_to new_project_fork_path(@project),
-          class: "btn btn-default #{'has-tooltip disabled' unless can_fork}",
-          title: (_('You have reached your project limit') unless can_fork) do
+          class: "btn btn-default #{'has-tooltip disabled' unless can_create_fork}",
+          title: (_('You have reached your project limit') unless can_create_fork) do
         = custom_icon('icon_fork')
         %span= s_('CreateNewFork|Fork')
     .count-with-arrow

app/views/projects/forks/new.html.haml

 - page_title "Fork project"
-- can_create_project = current_user.can_create_project?
 .row.prepend-top-default
   .col-lg-3
@@ -14,7 +13,7 @@
       - if @namespaces.present?
         %label.label-light
           %span
-            #{ "Click to fork the project to a #{'user or' if can_create_project} group" }
+            Click to fork the project
           - @namespaces.in_groups_of(6, false) do |group|
             .row
               - group.each do |namespace|
@@ -30,12 +29,12 @@
                       .caption
                         = namespace.human_name
                 - else
-                  - is_disabled = namespace.kind === 'user' && !can_create_project
-                  .fork-thumbnail{ class: ("disabled" if is_disabled) }
+                  - can_create_project = current_user.can?(:create_projects, namespace)
+                  .fork-thumbnail{ class: ("disabled" unless can_create_project) }
                     = link_to project_forks_path(@project, namespace_key: namespace.id),
                         method: "POST",
-                        class: ("disabled has-tooltip" if is_disabled),
-                        title: (_('You have reached your project limit') if is_disabled) do
+                        class: ("disabled has-tooltip" unless can_create_project),
+                        title: (_('You have reached your project limit') unless can_create_project) do
                       - if /no_((\w*)_)*avatar/.match(avatar)
                         .no-avatar
                           = icon 'question'

spec/policies/global_policy_spec.rb

@@ -52,6 +52,29 @@ describe GlobalPolicy do
     end
   end
+  describe "create fork" do
+    context "when user has not exceeded project limit" do
+      it { is_expected.to be_allowed(:create_fork) }
+    end
+
+    context "when user has exceeded project limit" do
+      let(:current_user) { create(:user, projects_limit: 0) }
+
+      it { is_expected.not_to be_allowed(:create_fork) }
+    end
+
+    context "when user is a master in a group" do
+      let(:group) { create(:group) }
+      let(:current_user) { create(:user, projects_limit: 0) }
+
+      before do
+        group.add_master(current_user)
+      end
+
+      it { is_expected.to be_allowed(:create_fork) }
+    end
+  end
+
   describe 'custom attributes' do
     context 'regular user' do
       it { is_expected.not_to be_allowed(:read_custom_attribute) }

spec/policies/namespace_policy_spec.rb

+require 'spec_helper'
+
+describe NamespacePolicy do
+  let(:current_user) { create(:user) }
+  let(:namespace) { current_user.namespace }
+
+  subject { described_class.new(current_user, namespace) }
+
+  context "create projects" do
+    context "user namespace" do
+      it { is_expected.to be_allowed(:create_projects) }
+    end
+
+    context "user who has exceeded project limit" do
+      let(:current_user) { create(:user, projects_limit: 0) }
+
+      it { is_expected.not_to be_allowed(:create_projects) }
+    end
+  end
+end