Tweaks, refactoring, and specs

37 files changed, 342 insertions, 441 deletions

diff --git a/app/assets/stylesheets/framework/mobile.scss b/app/assets/stylesheets/framework/mobile.scss
index bf874b9b822..5ea4f9a49db 100644
--- a/app/assets/stylesheets/framework/mobile.scss
+++ b/app/assets/stylesheets/framework/mobile.scss
@@ -48,7 +48,7 @@
       display: block;
     }
 
-    #project-home-desc {
+    .project-home-desc {
       font-size: 21px;
     }
 
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 1f55b18e0b1..3a0eb96a460 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -25,7 +25,6 @@ class ApplicationController < ActionController::Base
 
   helper_method :abilities, :can?, :current_application_settings
   helper_method :import_sources_enabled?, :github_import_enabled?, :github_import_configured?, :gitlab_import_enabled?, :gitlab_import_configured?, :bitbucket_import_enabled?, :bitbucket_import_configured?, :gitorious_import_enabled?, :google_code_import_enabled?, :fogbugz_import_enabled?, :git_import_enabled?
-  helper_method :repository, :can_collaborate_with_project?
 
   rescue_from Encoding::CompatibilityError do |exception|
     log_exception(exception)
@@ -118,47 +117,6 @@ class ApplicationController < ActionController::Base
     abilities.allowed?(object, action, subject)
   end
 
-  def project
-    unless @project
-      namespace = params[:namespace_id]
-      id = params[:project_id] || params[:id]
-
-      # Redirect from
-      #   localhost/group/project.git
-      # to
-      #   localhost/group/project
-      #
-      if id =~ /\.git\Z/
-        redirect_to request.original_url.gsub(/\.git\/?\Z/, '') and return
-      end
-
-      project_path = "#{namespace}/#{id}"
-      @project = Project.find_with_namespace(project_path)
-
-      if @project and can?(current_user, :read_project, @project)
-        if @project.path_with_namespace != project_path
-          redirect_to request.original_url.gsub(project_path, @project.path_with_namespace) and return
-        end
-        @project
-      elsif current_user.nil?
-        @project = nil
-        authenticate_user!
-      else
-        @project = nil
-        render_404 and return
-      end
-    end
-    @project
-  end
-
-  def repository
-    @repository ||= project.repository
-  end
-
-  def authorize_project!(action)
-    return access_denied! unless can?(current_user, action, project)
-  end
-
   def access_denied!
     render "errors/access_denied", layout: "errors", status: 404
   end
@@ -167,14 +125,6 @@ class ApplicationController < ActionController::Base
     render "errors/git_not_found.html", layout: "errors", status: 404
   end
 
-  def method_missing(method_sym, *arguments, &block)
-    if method_sym.to_s =~ /\Aauthorize_(.*)!\z/
-      authorize_project!($1.to_sym)
-    else
-      super
-    end
-  end
-
   def render_403
     head :forbidden
   end
@@ -183,10 +133,6 @@ class ApplicationController < ActionController::Base
     render file: Rails.root.join("public", "404"), layout: false, status: "404"
   end
 
-  def require_non_empty_project
-    redirect_to @project if @project.empty_repo?
-  end
-
   def no_cache_headers
     response.headers["Cache-Control"] = "no-cache, no-store, max-age=0, must-revalidate"
     response.headers["Pragma"] = "no-cache"
@@ -412,13 +358,6 @@ class ApplicationController < ActionController::Base
     current_user.nil? && root_path == request.path
   end
 
-  def can_collaborate_with_project?(project = nil)
-    project ||= @project
-
-    can?(current_user, :push_code, project) ||
-      (current_user && current_user.already_forked?(project))
-  end
-
   private
 
   def set_default_sort
diff --git a/app/controllers/groups/application_controller.rb b/app/controllers/groups/application_controller.rb
index 795ce50fe92..949b4a6c25a 100644
--- a/app/controllers/groups/application_controller.rb
+++ b/app/controllers/groups/application_controller.rb
@@ -1,21 +1,32 @@
 class Groups::ApplicationController < ApplicationController
   layout 'group'
+
+  skip_before_action :authenticate_user!
   before_action :group
 
   private
 
   def group
-    @group ||= Group.find_by(path: params[:group_id])
-  end
+    unless @group
+      id = params[:group_id] || params[:id]
+      @group = Group.find_by(path: id)
+
+      unless @group && can?(current_user, :read_group, @group)
+        @group = nil
 
-  def authorize_read_group!
-    unless @group && can?(current_user, :read_group, @group)
-      if current_user.nil?
-        return authenticate_user!
-      else
-        return render_404
+        if current_user.nil?
+          authenticate_user!
+        else
+          render_404
+        end
       end
     end
+
+    @group
+  end
+
+  def group_projects
+    @projects ||= GroupProjectsFinder.new(group).execute(current_user)
   end
 
   def authorize_admin_group!
diff --git a/app/controllers/groups/avatars_controller.rb b/app/controllers/groups/avatars_controller.rb
index 76c87366baa..ad2c20b42db 100644
--- a/app/controllers/groups/avatars_controller.rb
+++ b/app/controllers/groups/avatars_controller.rb
@@ -1,4 +1,6 @@
 class Groups::AvatarsController < Groups::ApplicationController
+  before_action :authorize_admin_group!
+
   def destroy
     @group.remove_avatar!
     @group.save
diff --git a/app/controllers/groups/group_members_controller.rb b/app/controllers/groups/group_members_controller.rb
index 0e902c4bb43..d5ef33888c6 100644
--- a/app/controllers/groups/group_members_controller.rb
+++ b/app/controllers/groups/group_members_controller.rb
@@ -1,8 +1,5 @@
 class Groups::GroupMembersController < Groups::ApplicationController
-  skip_before_action :authenticate_user!, only: [:index]
-
   # Authorize
-  before_action :authorize_read_group!
   before_action :authorize_admin_group_member!, except: [:index, :leave]
 
   def index
diff --git a/app/controllers/groups/milestones_controller.rb b/app/controllers/groups/milestones_controller.rb
index 0c2a350bc39..0028f072d5b 100644
--- a/app/controllers/groups/milestones_controller.rb
+++ b/app/controllers/groups/milestones_controller.rb
@@ -1,10 +1,10 @@
 class Groups::MilestonesController < Groups::ApplicationController
   include GlobalMilestones
 
-  before_action :projects
+  before_action :group_projects
   before_action :milestones, only: [:index]
   before_action :milestone, only: [:show, :update]
-  before_action :authorize_group_milestone!, only: [:create, :update]
+  before_action :authorize_admin_milestones!, only: [:new, :create, :update]
 
   def index
   end
@@ -17,7 +17,7 @@ class Groups::MilestonesController < Groups::ApplicationController
     project_ids = params[:milestone][:project_ids]
     title = milestone_params[:title]
 
-    @group.projects.where(id: project_ids).each do |project|
+    @projects.where(id: project_ids).each do |project|
       Milestones::CreateService.new(project, current_user, milestone_params).execute
     end
 
@@ -37,7 +37,7 @@ class Groups::MilestonesController < Groups::ApplicationController
 
   private
 
-  def authorize_group_milestone!
+  def authorize_admin_milestones!
     return render_404 unless can?(current_user, :admin_milestones, group)
   end
 
@@ -48,8 +48,4 @@ class Groups::MilestonesController < Groups::ApplicationController
   def milestone_path(title)
     group_milestone_path(@group, title.to_slug.to_s, title: title)
   end
-
-  def projects
-    @projects ||= @group.projects
-  end
 end
diff --git a/app/controllers/groups_controller.rb b/app/controllers/groups_controller.rb
index b635fb150ae..48565f44ffb 100644
--- a/app/controllers/groups_controller.rb
+++ b/app/controllers/groups_controller.rb
@@ -5,16 +5,15 @@ class GroupsController < Groups::ApplicationController
 
   respond_to :html
 
-  skip_before_action :authenticate_user!, only: [:index, :show, :issues, :merge_requests]
+  before_action :authenticate_user!, only: [:new, :create]
   before_action :group, except: [:index, :new, :create]
 
   # Authorize
-  before_action :authorize_read_group!, except: [:index, :new, :create]
   before_action :authorize_admin_group!, only: [:edit, :update, :destroy, :projects]
   before_action :authorize_create_group!, only: [:new, :create]
 
   # Load group projects
-  before_action :load_projects, except: [:index, :new, :create, :projects, :edit, :update, :autocomplete]
+  before_action :group_projects, only: [:show, :projects, :activity, :issues, :merge_requests]
   before_action :event_filter, only: [:activity]
 
   layout :determine_layout
@@ -39,12 +38,13 @@ class GroupsController < Groups::ApplicationController
 
   def show
     @last_push = current_user.recent_push if current_user
+
     @projects = @projects.includes(:namespace)
     @projects = filter_projects(@projects)
     @projects = @projects.sort(@sort = params[:sort])
     @projects = @projects.page(params[:page]).per(PER_PAGE) if params[:filter_projects].blank?
 
-    @shared_projects = @group.shared_projects
+    @shared_projects = GroupProjectsFinder.new(group, shared: true).execute(current_user)
 
     respond_to do |format|
       format.html
@@ -77,7 +77,7 @@ class GroupsController < Groups::ApplicationController
   end
 
   def projects
-    @projects = @group.projects.page(params[:page])
+    @projects = @projects.sorted_by_activity.page(params[:page])
   end
 
   def update
@@ -96,15 +96,6 @@ class GroupsController < Groups::ApplicationController
 
   protected
 
-  def group
-    @group ||= Group.find_by(path: params[:id])
-    @group || render_404
-  end
-
-  def load_projects
-    @projects ||= ProjectsFinder.new.execute(current_user, group: group).sorted_by_activity
-  end
-
   def authorize_create_group!
     unless can?(current_user, :create_group, nil)
       return render_404
diff --git a/app/controllers/projects/application_controller.rb b/app/controllers/projects/application_controller.rb
index a326bc58215..276f80f800a 100644
--- a/app/controllers/projects/application_controller.rb
+++ b/app/controllers/projects/application_controller.rb
@@ -1,20 +1,73 @@
 class Projects::ApplicationController < ApplicationController
-  before_action :project
-  before_action :repository
+  skip_before_action :authenticate_user!
+  before_action :project, :repository
   layout 'project'
 
-  def authenticate_user!
-    # Restrict access to Projects area only
-    # for non-signed users
-    if !current_user
+  helper_method :repository, :can_collaborate_with_project?
+
+  private
+
+  def project
+    unless @project
+      namespace = params[:namespace_id]
       id = params[:project_id] || params[:id]
-      project_with_namespace = "#{params[:namespace_id]}/#{id}"
-      @project = Project.find_with_namespace(project_with_namespace)
 
-      return if @project && @project.public?
+      # Redirect from
+      #   localhost/group/project.git
+      # to
+      #   localhost/group/project
+      #
+      if id =~ /\.git\Z/
+        redirect_to request.original_url.gsub(/\.git\/?\Z/, '')
+        return
+      end
+
+      project_path = "#{namespace}/#{id}"
+      @project = Project.find_with_namespace(project_path)
+
+      if @project && can?(current_user, :read_project, @project)
+        if @project.path_with_namespace != project_path
+          redirect_to request.original_url.gsub(project_path, @project.path_with_namespace)
+        end
+      else
+        @project = nil
+
+        if current_user.nil?
+          authenticate_user!
+        else
+          render_404
+        end
+      end
+    end
+
+    @project
+  end
+
+  def repository
+    @repository ||= project.repository
+  end
+
+  def can_collaborate_with_project?(project = nil)
+    project ||= @project
+
+    can?(current_user, :push_code, project) ||
+      (current_user && current_user.already_forked?(project))
+  end
+
+  def authorize_project!(action)
+    return access_denied! unless can?(current_user, action, project)
+  end
+
+  def method_missing(method_sym, *arguments, &block)
+    if method_sym.to_s =~ /\Aauthorize_(.*)!\z/
+      authorize_project!($1.to_sym)
+    else
+      super
     end
+  end
 
-    super
+  def require_non_empty_project
+    redirect_to @project if @project.empty_repo?
   end
 
   def require_branch_head
@@ -26,8 +79,6 @@ class Projects::ApplicationController < ApplicationController
     end
   end
 
-  private
-
   def apply_diff_view_cookie!
     view = params[:view] || cookies[:diff_view]
     cookies.permanent[:diff_view] = params[:view] = view if view
diff --git a/app/controllers/projects/avatars_controller.rb b/app/controllers/projects/avatars_controller.rb
index a6bebc46b06..72921b3aa14 100644
--- a/app/controllers/projects/avatars_controller.rb
+++ b/app/controllers/projects/avatars_controller.rb
@@ -1,7 +1,7 @@
 class Projects::AvatarsController < Projects::ApplicationController
   include BlobHelper
 
-  before_action :project
+  before_action :authorize_admin_project!, only: [:destroy]
 
   def show
     @blob = @repository.blob_at_branch('master', @project.avatar_in_git)
diff --git a/app/controllers/projects/uploads_controller.rb b/app/controllers/projects/uploads_controller.rb
index e1fe7ea2114..94c51eeb94d 100644
--- a/app/controllers/projects/uploads_controller.rb
+++ b/app/controllers/projects/uploads_controller.rb
@@ -1,7 +1,9 @@
 class Projects::UploadsController < Projects::ApplicationController
-  skip_before_action :authenticate_user!, :reject_blocked!, :project,
+  skip_before_action :reject_blocked!, :project,
     :repository, if: -> { action_name == 'show' && image? }
 
+  before_action :authenticate_user!, only: [:create]
+
   def create
     link_to_file = ::Projects::UploadService.new(project, params[:file]).
       execute
@@ -26,6 +28,8 @@ class Projects::UploadsController < Projects::ApplicationController
     send_file uploader.file.path, disposition: disposition
   end
 
+  private
+
   def uploader
     return @uploader if defined?(@uploader)
 
diff --git a/app/controllers/projects_controller.rb b/app/controllers/projects_controller.rb
index c9930480770..928817ba811 100644
--- a/app/controllers/projects_controller.rb
+++ b/app/controllers/projects_controller.rb
@@ -1,7 +1,7 @@
-class ProjectsController < ApplicationController
+class ProjectsController < Projects::ApplicationController
   include ExtractsPath
 
-  skip_before_action :authenticate_user!, only: [:show, :activity]
+  before_action :authenticate_user!, except: [:show, :activity]
   before_action :project, except: [:new, :create]
   before_action :repository, except: [:new, :create]
   before_action :assign_ref_vars, :tree, only: [:show], if: :repo_exists?
diff --git a/app/finders/contributed_projects_finder.rb b/app/finders/contributed_projects_finder.rb
index f8b04dfa2aa..a685719555c 100644
--- a/app/finders/contributed_projects_finder.rb
+++ b/app/finders/contributed_projects_finder.rb
@@ -1,4 +1,4 @@
-class ContributedProjectsFinder
+class ContributedProjectsFinder < UnionFinder
   def initialize(user)
     @user = user
   end
@@ -10,27 +10,20 @@ class ContributedProjectsFinder
   #                visible by this user.
   #
   # Returns an ActiveRecord::Relation.
-
   def execute(current_user = nil)
-    if current_user
-      relation = projects_visible_to_user(current_user)
-    else
-      relation = public_projects
-    end
+    segments = all_projects(current_user)
 
-    relation.includes(:namespace).order_id_desc
+    find_union(segments, Project).includes(:namespace).order_id_desc
   end
 
   private
 
-  def projects_visible_to_user(current_user)
-    authorized = @user.contributed_projects.visible_to_user(current_user)
-    union = Gitlab::SQL::Union.new([authorized.select(:id), public_projects.select(:id)])
+  def all_projects(current_user)
+    projects = []
 
-    Project.where("projects.id IN (#{union.to_sql})")
-  end
+    projects << @user.contributed_projects.visible_to_user(current_user) if current_user
+    projects << @user.contributed_projects.public_to_user(current_user)
 
-  def public_projects
-    @user.contributed_projects.public_only
+    projects
   end
 end
diff --git a/app/finders/group_projects_finder.rb b/app/finders/group_projects_finder.rb
new file mode 100644
index 00000000000..84fe468ae5d
--- /dev/null
+++ b/app/finders/group_projects_finder.rb
@@ -0,0 +1,43 @@
+class GroupProjectsFinder < UnionFinder
+  def initialize(group, options = {})
+    @group = group
+    @options = options
+  end
+
+  def execute(current_user = nil)
+    segments = group_projects(current_user)
+
+    find_union(segments, Project)
+  end
+
+  private
+
+  def group_projects(current_user)
+    include_owned = @options.fetch(:owned, true)
+    include_shared = @options.fetch(:shared, true)
+
+    projects = []
+
+    if current_user
+      if @group.users.include?(current_user)
+        projects << @group.projects if include_owned
+        projects << @group.shared_projects if include_shared
+      else
+        if include_owned
+          projects << @group.projects.visible_to_user(current_user)
+          projects << @group.projects.public_to_user(current_user)
+        end
+
+        if include_shared
+          projects << @group.shared_projects.visible_to_user(current_user)
+          projects << @group.shared_projects.public_to_user(current_user)
+        end
+      end
+    else
+      projects << @group.projects.public_only if include_owned
+      projects << @group.shared_projects.public_only if include_shared
+    end
+
+    projects
+  end
+end
diff --git a/app/finders/groups_finder.rb b/app/finders/groups_finder.rb
index 30698f80231..4e43f42e9e1 100644
--- a/app/finders/groups_finder.rb
+++ b/app/finders/groups_finder.rb
@@ -1,30 +1,18 @@
-class GroupsFinder
+class GroupsFinder < UnionFinder
   def execute(current_user = nil)
     segments = all_groups(current_user)
 
-    if segments.length > 1
-      union = Gitlab::SQL::Union.new(segments.map { |s| s.select(:id) })
-      Group.where("namespaces.id IN (#{union.to_sql})").order_id_desc
-    else
-      segments.first
-    end
+    find_union(segments, Group).order_id_desc
   end
 
   private
 
   def all_groups(current_user)
-    if current_user
-      user_groups(current_user)
-    else
-      [Group.unscoped.public_only]
-    end
-  end
+    groups = []
+
+    groups << current_user.authorized_groups if current_user
+    groups << Group.unscoped.public_to_user(current_user)
 
-  def user_groups(current_user)
-    if current_user.external?
-      [current_user.authorized_groups, Group.unscoped.public_only]
-    else
-      [current_user.authorized_groups, Group.unscoped.public_and_internal_only]
-    end
+    groups
   end
 end
diff --git a/app/finders/issuable_finder.rb b/app/finders/issuable_finder.rb
index 19e8c7a92be..7510f6e9e29 100644
--- a/app/finders/issuable_finder.rb
+++ b/app/finders/issuable_finder.rb
@@ -81,7 +81,7 @@ class IssuableFinder
     elsif current_user && params[:authorized_only].presence && !current_user_related?
       @projects = current_user.authorized_projects.reorder(nil)
     else
-      @projects = ProjectsFinder.new.execute(current_user, group: group).
+      @projects = GroupProjectsFinder.new(group).execute(current_user).
         reorder(nil)
     end
   end
@@ -170,7 +170,7 @@ class IssuableFinder
   end
 
   def by_scope(items)
-    case params[:scope]
+    case params[:scope] || 'all'
     when 'created-by-me', 'authored' then
       items.where(author_id: current_user.id)
     when 'all' then
diff --git a/app/finders/joined_groups_finder.rb b/app/finders/joined_groups_finder.rb
index 867eb661682..2a3f0296d37 100644
--- a/app/finders/joined_groups_finder.rb
+++ b/app/finders/joined_groups_finder.rb
@@ -1,5 +1,4 @@
-#Shows only authorized groups of a user
-class JoinedGroupsFinder
+class JoinedGroupsFinder < UnionFinder
   def initialize(user)
     @user = user
   end
@@ -12,34 +11,19 @@ class JoinedGroupsFinder
   #
   # Returns an ActiveRecord::Relation.
   def execute(current_user = nil)
-    if current_user
-      relation = groups_visible_to_user(current_user)
-    else
-      relation = public_groups
-    end
+    segments = all_groups(current_user)
 
-    relation.order_id_desc
+    find_union(segments, Group).order_id_desc
   end
 
   private
 
-  # Returns the groups the user in "current_user" can see.
-  #
-  # This list includes all public/internal projects as well as the projects of
-  # "@user" that "current_user" also has access to.
-  def groups_visible_to_user(current_user)
-    base  = @user.authorized_groups.visible_to_user(current_user)
-    extra = current_user.external? ? public_groups : public_and_internal_groups
-    union = Gitlab::SQL::Union.new([base.select(:id), extra.select(:id)])
-
-    Group.where("namespaces.id IN (#{union.to_sql})")
-  end
+  def all_groups(current_user)
+    groups = []
 
-  def public_groups
-    @user.authorized_groups.public_only
-  end
+    groups << @user.authorized_groups.visible_to_user(current_user) if current_user
+    groups << @user.authorized_groups.public_to_user(current_user)
 
-  def public_and_internal_groups
-    @user.authorized_groups.public_and_internal_only
+    groups
   end
 end
diff --git a/app/finders/personal_projects_finder.rb b/app/finders/personal_projects_finder.rb
index 34f33e2353b..3ad4bd5f066 100644
--- a/app/finders/personal_projects_finder.rb
+++ b/app/finders/personal_projects_finder.rb
@@ -1,4 +1,4 @@
-class PersonalProjectsFinder
+class PersonalProjectsFinder < UnionFinder
   def initialize(user)
     @user = user
   end
@@ -11,38 +11,19 @@ class PersonalProjectsFinder
   #
   # Returns an ActiveRecord::Relation.
   def execute(current_user = nil)
-    if current_user
-      relation = projects_visible_to_user(current_user)
-    else
-      relation = public_projects
-    end
+    segments = all_projects(current_user)
 
-    relation.includes(:namespace).order_id_desc
+    find_union(segments, Project).includes(:namespace).order_id_desc
   end
 
   private
 
-  def projects_visible_to_user(current_user)
-    union = Gitlab::SQL::Union.new(projects_for_user_ids(current_user))
+  def all_projects(current_user)
+    projects = []
 
-    Project.where("projects.id IN (#{union.to_sql})")
-  end
-
-  def public_projects
-    @user.personal_projects.public_only
-  end
-
-  def public_and_internal_projects
-    @user.personal_projects.public_and_internal_only
-  end
-
-  def projects_for_user_ids(current_user)
-    authorized = @user.personal_projects.visible_to_user(current_user)
+    projects << @user.personal_projects.visible_to_user(current_user) if current_user
+    projects << @user.personal_projects.public_to_user(current_user)
 
-    if current_user.external?
-      [authorized.select(:id), public_projects.select(:id)]
-    else
-      [authorized.select(:id), public_and_internal_projects.select(:id)]
-    end
+    projects
   end
 end
diff --git a/app/finders/projects_finder.rb b/app/finders/projects_finder.rb
index 3a5fc5b5907..2f0a9659d15 100644
--- a/app/finders/projects_finder.rb
+++ b/app/finders/projects_finder.rb
@@ -1,81 +1,18 @@
-class ProjectsFinder
-  # Returns all projects, optionally including group projects a user has access
-  # to.
-  #
-  # ## Examples
-  #
-  # Retrieving all public projects:
-  #
-  #     ProjectsFinder.new.execute
-  #
-  # Retrieving all public/internal projects and those the given user has access
-  # to:
-  #
-  #     ProjectsFinder.new.execute(some_user)
-  #
-  # Retrieving all public/internal projects as well as the group's projects the
-  # user has access to:
-  #
-  #     ProjectsFinder.new.execute(some_user, group: some_group)
-  #
-  # Returns an ActiveRecord::Relation.
+class ProjectsFinder < UnionFinder
   def execute(current_user = nil, options = {})
-    group = options[:group]
+    segments = all_projects(current_user)
 
-    if group
-      segments = group_projects(current_user, group)
-    else
-      segments = all_projects(current_user)
-    end
-
-    if segments.length > 1
-      union = Gitlab::SQL::Union.new(segments.map { |s| s.select(:id) })
-
-      Project.where("projects.id IN (#{union.to_sql})")
-    else
-      segments.first
-    end
+    find_union(segments, Project)
   end
 
   private
 
-  def group_projects(current_user, group)
-    return [group.projects.public_only] unless current_user
-
-    user_group_projects = [
-       group_projects_for_user(current_user, group),
-       group.shared_projects.visible_to_user(current_user)
-    ]
-    if current_user.external?
-      user_group_projects << group.projects.public_only
-    else
-      user_group_projects << group.projects.public_and_internal_only
-    end
-  end
-
   def all_projects(current_user)
-    return [public_projects] unless current_user
+    projects = []
 
-    if current_user.external?
-      [current_user.authorized_projects, public_projects]
-    else
-      [current_user.authorized_projects, public_and_internal_projects]
-    end
-  end
-
-  def group_projects_for_user(current_user, group)
-    if group.users.include?(current_user)
-      group.projects
-    else
-      group.projects.visible_to_user(current_user)
-    end
-  end
-
-  def public_projects
-    Project.unscoped.public_only
-  end
+    projects << current_user.authorized_projects if current_user
+    projects << Project.unscoped.public_to_user(current_user)
 
-  def public_and_internal_projects
-    Project.unscoped.public_and_internal_only
+    projects
   end
 end
diff --git a/app/finders/union_finder.rb b/app/finders/union_finder.rb
new file mode 100644
index 00000000000..33cd1a491f3
--- /dev/null
+++ b/app/finders/union_finder.rb
@@ -0,0 +1,11 @@
+class UnionFinder
+  def find_union(segments, klass)
+    if segments.length > 1
+      union = Gitlab::SQL::Union.new(segments.map { |s| s.select(:id) })
+
+      klass.where("#{klass.table_name}.id IN (#{union.to_sql})")
+    else
+      segments.first
+    end
+  end
+end
diff --git a/app/helpers/groups_helper.rb b/app/helpers/groups_helper.rb
index 42e09149bd7..b1f0a765bb9 100644
--- a/app/helpers/groups_helper.rb
+++ b/app/helpers/groups_helper.rb
@@ -43,8 +43,4 @@ module GroupsHelper
       full_title
     end
   end
-
-  def group_visibility_description(group)
-    "#{visibility_level_label(group.visibility_level)} - #{group_visibility_level_description(group.visibility_level)}"
-  end
 end
diff --git a/app/helpers/visibility_level_helper.rb b/app/helpers/visibility_level_helper.rb
index 7fa18ba9079..5b1bfb261a5 100644
--- a/app/helpers/visibility_level_helper.rb
+++ b/app/helpers/visibility_level_helper.rb
@@ -63,6 +63,14 @@ module VisibilityLevelHelper
     end
   end
 
+  def group_visibility_icon_description(group)
+    "#{visibility_level_label(group.visibility_level)} - #{group_visibility_level_description(group.visibility_level)}"
+  end
+
+  def project_visibility_icon_description(project)
+    "#{visibility_level_label(project.visibility_level)} - #{project_visibility_level_description(project.visibility_level)}"
+  end
+
   def visibility_level_label(level)
     Project.visibility_levels.key(level)
   end
diff --git a/app/models/ability.rb b/app/models/ability.rb
index 88d7ecf3a16..de9253fcdd8 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -114,6 +114,13 @@ class Ability
         # Push abilities on the users team role
         rules.push(*project_team_rules(project.team, user))
 
+        if project.owner == user ||
+          (project.group && project.group.has_owner?(user)) ||
+          user.admin?
+
+          rules.push(*project_owner_rules)
+        end
+
         if project.public? || (project.internal? && !user.external?)
           rules.push(*public_project_rules)
 
@@ -121,14 +128,6 @@ class Ability
           rules << :read_build if project.public_builds?
         end
 
-        if project.owner == user || user.admin?
-          rules.push(*project_admin_rules)
-        end
-
-        if project.group && project.group.has_owner?(user)
-          rules.push(*project_admin_rules)
-        end
-
         if project.archived?
           rules -= project_archived_rules
         end
@@ -228,8 +227,8 @@ class Ability
       ]
     end
 
-    def project_admin_rules
-      @project_admin_rules ||= project_master_rules + [
+    def project_owner_rules
+      @project_owner_rules ||= project_master_rules + [
         :change_namespace,
         :change_visibility_level,
         :rename_project,
@@ -275,7 +274,7 @@ class Ability
 
       rules << :read_group if can_read_group?(user, group)
 
-      # Only group masters and group owners can create new projects and change permission level
+      # Only group masters and group owners can create new projects
       if group.has_master?(user) || group.has_owner?(user) || user.admin?
         rules += [
           :create_projects,
@@ -298,7 +297,7 @@ class Ability
 
     def can_read_group?(user, group)
       user.admin? || group.public? || (group.internal? && !user.external?) || group.users.include?(user) ||
-        ProjectsFinder.new.execute(user, group: group).any?
+        GroupProjectsFinder.new(group).execute(user).any?
     end
 
     def namespace_abilities(user, namespace)
diff --git a/app/models/group.rb b/app/models/group.rb
index 17c69af4d1b..900fcd71ff3 100644
--- a/app/models/group.rb
+++ b/app/models/group.rb
@@ -83,16 +83,9 @@ class Group < Namespace
   end
 
   def visibility_level_allowed_by_projects
-    unless visibility_level_allowed?
-      level_name = Gitlab::VisibilityLevel.level_name(visibility_level).downcase
-      self.errors.add(:visibility_level, "#{level_name} is not allowed since there are projects with higher visibility.")
-    end
-  end
-
-  def visibility_level_allowed?
     projects_visibility = self.projects.pluck(:visibility_level)
 
-    allowed_by_projects = projects_visibility.none? { |project_visibility| self.visibility_level < project_visibility }
+    allowed_by_projects = projects_visibility.all? { |project_visibility| self.visibility_level >= project_visibility }
 
     unless allowed_by_projects
       level_name = Gitlab::VisibilityLevel.level_name(visibility_level).downcase
diff --git a/app/models/project.rb b/app/models/project.rb
index c1374fc9b3c..ab31a635a82 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -197,7 +197,8 @@ class Project < ActiveRecord::Base
   validate :avatar_type,
     if: ->(project) { project.avatar.present? && project.avatar_changed? }
   validates :avatar, file_size: { maximum: 200.kilobytes.to_i }
-  validate :visibility_level_allowed_in_group
+  validate :visibility_level_allowed_by_group
+  validate :visibility_level_allowed_as_fork
 
   add_authentication_token_field :runners_token
   before_save :ensure_runners_token
@@ -441,16 +442,25 @@ class Project < ActiveRecord::Base
 
   def check_limit
     unless creator.can_create_project? or namespace.kind == 'group'
-      errors[:limit_reached] << ("Your project limit is #{creator.projects_limit} projects! Please contact your administrator to increase it")
+      self.errors.add(:limit_reached, "Your project limit is #{creator.projects_limit} projects! Please contact your administrator to increase it")
     end
   rescue
-    errors[:base] << ("Can't check your ability to create project")
+    self.errors.add(:base, "Can't check your ability to create project")
   end
 
-  def visibility_level_allowed_in_group
-    unless visibility_level_allowed?
-      self.errors.add(:visibility_level, "#{self.visibility_level} is not allowed in a #{self.group.visibility_level} group.")
-    end
+  def visibility_level_allowed_by_group
+    return if visibility_level_allowed_by_group?
+
+    level_name = Gitlab::VisibilityLevel.level_name(self.visibility_level).downcase
+    group_level_name = Gitlab::VisibilityLevel.level_name(self.group.visibility_level).downcase
+    self.errors.add(:visibility_level, "#{level_name} is not allowed in a #{group_level_name} group.")
+  end
+
+  def visibility_level_allowed_as_fork
+    return if visibility_level_allowed_as_fork?
+
+    level_name = Gitlab::VisibilityLevel.level_name(self.visibility_level).downcase
+    self.errors.add(:visibility_level, "#{level_name} is not allowed since the fork source project has lower visibility.")
   end
 
   def to_param
@@ -965,22 +975,22 @@ class Project < ActiveRecord::Base
     issues.opened.count
   end
 
-  def visibility_level_allowed?(level = self.visibility_level)
-    allowed_by_forks =  if forked? && forked_project_link.forked_from_project_id.present?
-                          from_project = eager_load_forked_from_project
-                          Gitlab::VisibilityLevel.allowed_fork_levels(from_project.visibility_level).include?(level)
-                        else
-                          true
-                        end
+  def visibility_level_allowed_as_fork?(level = self.visibility_level)
+    return true unless forked? && forked_project_link.forked_from_project_id.present?
+
+    from_project = self.forked_from_project
+    from_project ||= Project.find(forked_project_link.forked_from_project_id)
+    Gitlab::VisibilityLevel.allowed_fork_levels(from_project.visibility_level).include?(level)
+  end
 
-    allowed_by_groups = group.present? ? level <= group.visibility_level : true
+  def visibility_level_allowed_by_group?(level = self.visibility_level)
+    return true unless group
 
-    allowed_by_forks && allowed_by_groups
+    level <= group.visibility_level
   end
 
-  #Necessary to retrieve many-to-many associations on new forks before validating visibility level
-  def eager_load_forked_from_project
-    Project.find(forked_project_link.forked_from_project_id)
+  def visibility_level_allowed?(level = self.visibility_level)
+    visibility_level_allowed_as_fork?(level) && visibility_level_allowed_by_group?(level)
   end
 
   def runners_token
diff --git a/app/services/base_service.rb b/app/services/base_service.rb
index 8563633816c..0d55ba5a981 100644
--- a/app/services/base_service.rb
+++ b/app/services/base_service.rb
@@ -43,12 +43,9 @@ class BaseService
   def deny_visibility_level(model, denied_visibility_level = nil)
     denied_visibility_level ||= model.visibility_level
 
-    level_name = Gitlab::VisibilityLevel.level_name(denied_visibility_level)
+    level_name = Gitlab::VisibilityLevel.level_name(denied_visibility_level).downcase
 
-    model.errors.add(
-      :visibility_level,
-      "#{level_name} visibility has been restricted by your GitLab administrator"
-    )
+    model.errors.add(:visibility_level, "#{level_name} has been restricted by your GitLab administrator")
   end
 
   private
diff --git a/app/services/create_snippet_service.rb b/app/services/create_snippet_service.rb
index 101a3df5eee..9884cb96661 100644
--- a/app/services/create_snippet_service.rb
+++ b/app/services/create_snippet_service.rb
@@ -6,8 +6,7 @@ class CreateSnippetService < BaseService
       snippet = project.snippets.build(params)
     end
 
-    unless Gitlab::VisibilityLevel.allowed_for?(current_user,
-                                                params[:visibility_level])
+    unless Gitlab::VisibilityLevel.allowed_for?(current_user, params[:visibility_level])
       deny_visibility_level(snippet)
       return snippet
     end
diff --git a/app/services/groups/base_service.rb b/app/services/groups/base_service.rb
index 1db81216084..1642115583d 100644
--- a/app/services/groups/base_service.rb
+++ b/app/services/groups/base_service.rb
@@ -1,20 +1,9 @@
 module Groups
-  class BaseService
+  class BaseService < BaseService
     attr_accessor :group, :current_user, :params
 
     def initialize(group, user, params = {})
       @group, @current_user, @params = group, user, params.dup
     end
-
-    private
-
-    def visibility_allowed_for_user?
-      level = group.visibility_level
-      allowed_by_user  = Gitlab::VisibilityLevel.allowed_for?(current_user, level)
-
-      group.errors.add(:visibility_level, "#{level} has been restricted by your GitLab administrator.") unless allowed_by_user
-      
-      allowed_by_user
-    end
   end
 end
diff --git a/app/services/groups/create_service.rb b/app/services/groups/create_service.rb
index f605ccca81b..46c2a53e1f6 100644
--- a/app/services/groups/create_service.rb
+++ b/app/services/groups/create_service.rb
@@ -7,7 +7,10 @@ module Groups
     def execute
       @group = Group.new(params)
 
-      return @group unless visibility_allowed_for_user?
+      unless Gitlab::VisibilityLevel.allowed_for?(current_user, params[:visibility_level])
+        deny_visibility_level(@group)
+        return @group
+      end
 
       @group.name = @group.path.dup unless @group.name
       @group.save
diff --git a/app/services/groups/update_service.rb b/app/services/groups/update_service.rb
index 0b0c5a35d37..b70e2e4aaa9 100644
--- a/app/services/groups/update_service.rb
+++ b/app/services/groups/update_service.rb
@@ -5,9 +5,18 @@
 module Groups
   class UpdateService < Groups::BaseService
     def execute
-      group.assign_attributes(params)
+      # check that user is allowed to set specified visibility_level
+      new_visibility = params[:visibility_level]
+      if new_visibility && new_visibility.to_i != group.visibility_level
+        unless can?(current_user, :change_visibility_level, group) &&
+          Gitlab::VisibilityLevel.allowed_for?(current_user, new_visibility)
+
+          deny_visibility_level(group, new_visibility)
+          return group
+        end
+      end
 
-      return false unless visibility_allowed_for_user?
+      group.assign_attributes(params)
 
       group.save
     end
diff --git a/app/services/projects/create_service.rb b/app/services/projects/create_service.rb
index c4b8420f9f2..501e58c1407 100644
--- a/app/services/projects/create_service.rb
+++ b/app/services/projects/create_service.rb
@@ -10,7 +10,7 @@ module Projects
       @project = Project.new(params)
 
       # Make sure that the user is allowed to use the specified visibility level
-      unless visibility_level_allowed?
+      unless Gitlab::VisibilityLevel.allowed_for?(current_user, params[:visibility_level])
         deny_visibility_level(@project)
         return @project
       end
@@ -96,9 +96,5 @@ module Projects
 
       @project.import_start if @project.import?
     end
-
-    def visibility_level_allowed?
-      Gitlab::VisibilityLevel.allowed_for?(current_user, params[:visibility_level]) && @project.visibility_level_allowed?(@project.visibility_level)
-    end
   end
 end
diff --git a/app/services/projects/update_service.rb b/app/services/projects/update_service.rb
index 895e089bea3..941df08995c 100644
--- a/app/services/projects/update_service.rb
+++ b/app/services/projects/update_service.rb
@@ -3,16 +3,13 @@ module Projects
     def execute
       # check that user is allowed to set specified visibility_level
       new_visibility = params[:visibility_level]
-      if new_visibility
-        if new_visibility.to_i != project.visibility_level
-          unless can?(current_user, :change_visibility_level, project) &&
-            Gitlab::VisibilityLevel.allowed_for?(current_user, new_visibility)
-            deny_visibility_level(project, new_visibility)
-            return project
-          end
+      if new_visibility && new_visibility.to_i != project.visibility_level
+        unless can?(current_user, :change_visibility_level, project) &&
+          Gitlab::VisibilityLevel.allowed_for?(current_user, new_visibility)
+          
+          deny_visibility_level(project, new_visibility)
+          return project
         end
-
-        return false unless visibility_level_allowed?(new_visibility)
       end
 
       new_branch = params[:default_branch]
@@ -27,19 +24,5 @@ module Projects
         end
       end
     end
-
-    private
-
-    def visibility_level_allowed?(level)
-      return true if project.visibility_level_allowed?(level)
-
-      level_name = Gitlab::VisibilityLevel.level_name(level)
-      project.errors.add(
-        :visibility_level,
-        "#{level_name} could not be set as visibility level of this project - parent project settings are more restrictive"
-      )
-
-      false
-    end
   end
 end
diff --git a/app/services/update_snippet_service.rb b/app/services/update_snippet_service.rb
index e9328bb7323..93af8f21972 100644
--- a/app/services/update_snippet_service.rb
+++ b/app/services/update_snippet_service.rb
@@ -9,7 +9,6 @@ class UpdateSnippetService < BaseService
   def execute
     # check that user is allowed to set specified visibility_level
     new_visibility = params[:visibility_level]
-
     if new_visibility && new_visibility.to_i != snippet.visibility_level
       unless Gitlab::VisibilityLevel.allowed_for?(current_user, new_visibility)
         deny_visibility_level(snippet, new_visibility)
diff --git a/app/views/groups/show.html.haml b/app/views/groups/show.html.haml
index 222c3e4a40e..5a9fa5d9a4d 100644
--- a/app/views/groups/show.html.haml
+++ b/app/views/groups/show.html.haml
@@ -17,7 +17,7 @@
   .cover-title
     %h1
       = @group.name
-      %span.visibility-icon.has_tooltip{ data: { container: 'body', placement: 'left' }, title: group_visibility_description(@group) }
+      %span.visibility-icon.has_tooltip{ data: { container: 'body' }, title: group_visibility_icon_description(@group) }
         = visibility_level_icon(@group.visibility_level, fw: false)
 
   .cover-desc.username
@@ -27,34 +27,29 @@
     .cover-desc.description
       = markdown(@group.description, pipeline: :description)
 
-- if can?(current_user, :read_group, @group)
-  %div{ class: container_class }
-    .top-area
-      %ul.nav-links
-        %li.active
-          = link_to "#projects", 'data-toggle' => 'tab' do
-            All Projects
-        - if @shared_projects.present?
-          %li
-            = link_to "#shared", 'data-toggle' => 'tab' do
-              Shared Projects
-      .nav-controls
-        = form_tag request.original_url, method: :get, class: 'project-filter-form', id: 'project-filter-form' do |f|
-          = search_field_tag :filter_projects, nil, placeholder: 'Filter by name', class: 'projects-list-filter form-control', spellcheck: false
-        = render 'shared/projects/dropdown'
-        - if can? current_user, :create_projects, @group
-          = link_to new_project_path(namespace_id: @group.id), class: 'btn btn-new pull-right' do
-            = icon('plus')
-            New Project
-
-    .tab-content
-      .tab-pane.active#projects
-        = render "projects", projects: @projects
-
+%div{ class: container_class }
+  .top-area
+    %ul.nav-links
+      %li.active
+        = link_to "#projects", 'data-toggle' => 'tab' do
+          All Projects
       - if @shared_projects.present?
-        .tab-pane#shared
-          = render "shared_projects", projects: @shared_projects
-
-- else
-  %p.nav-links.no-top
-    No projects to show
+        %li
+          = link_to "#shared", 'data-toggle' => 'tab' do
+            Shared Projects
+    .nav-controls
+      = form_tag request.original_url, method: :get, class: 'project-filter-form', id: 'project-filter-form' do |f|
+        = search_field_tag :filter_projects, nil, placeholder: 'Filter by name', class: 'projects-list-filter form-control', spellcheck: false
+      = render 'shared/projects/dropdown'
+      - if can? current_user, :create_projects, @group
+        = link_to new_project_path(namespace_id: @group.id), class: 'btn btn-new pull-right' do
+          = icon('plus')
+          New Project
+
+  .tab-content
+    .tab-pane.active#projects
+      = render "projects", projects: @projects
+
+    - if @shared_projects.present?
+      .tab-pane#shared
+        = render "shared_projects", projects: @shared_projects
diff --git a/app/views/layouts/nav/_group.html.haml b/app/views/layouts/nav/_group.html.haml
index 59411ae1da1..55940741dc0 100644
--- a/app/views/layouts/nav/_group.html.haml
+++ b/app/views/layouts/nav/_group.html.haml
@@ -12,40 +12,38 @@
       = icon('group fw')
       %span
         Group
-  - if can?(current_user, :read_group, @group)
-    = nav_link(path: 'groups#activity') do
-      = link_to activity_group_path(@group), title: 'Activity' do
-        = icon('dashboard fw')
-        %span
-          Activity
-    - if current_user
-      = nav_link(controller: [:group, :milestones]) do
-        = link_to group_milestones_path(@group), title: 'Milestones' do
-          = icon('clock-o fw')
-          %span
-            Milestones
-    = nav_link(path: 'groups#issues') do
-      = link_to issues_group_path(@group), title: 'Issues' do
-        = icon('exclamation-circle fw')
-        %span
-          Issues
-          - if current_user
-            %span.count= number_with_delimiter(Issue.opened.of_group(@group).count)
-    = nav_link(path: 'groups#merge_requests') do
-      = link_to merge_requests_group_path(@group), title: 'Merge Requests' do
-        = icon('tasks fw')
-        %span
-          Merge Requests
-          - if current_user
-            %span.count= number_with_delimiter(MergeRequest.opened.of_group(@group).count)
-    = nav_link(controller: [:group_members]) do
-      = link_to group_group_members_path(@group), title: 'Members' do
-        = icon('users fw')
+  = nav_link(path: 'groups#activity') do
+    = link_to activity_group_path(@group), title: 'Activity' do
+      = icon('dashboard fw')
+      %span
+        Activity
+  = nav_link(controller: [:group, :milestones]) do
+    = link_to group_milestones_path(@group), title: 'Milestones' do
+      = icon('clock-o fw')
+      %span
+        Milestones
+  = nav_link(path: 'groups#issues') do
+    = link_to issues_group_path(@group), title: 'Issues' do
+      = icon('exclamation-circle fw')
+      %span
+        Issues
+        - issues = IssuesFinder.new(current_user, group_id: @group.id, state: 'opened').execute
+        %span.count= number_with_delimiter(issues.count)
+  = nav_link(path: 'groups#merge_requests') do
+    = link_to merge_requests_group_path(@group), title: 'Merge Requests' do
+      = icon('tasks fw')
+      %span
+        Merge Requests
+        - merge_requests = MergeRequestsFinder.new(current_user, group_id: @group.id, state: 'opened').execute
+        %span.count= number_with_delimiter(merge_requests.count)
+  = nav_link(controller: [:group_members]) do
+    = link_to group_group_members_path(@group), title: 'Members' do
+      = icon('users fw')
+      %span
+        Members
+  - if can?(current_user, :admin_group, @group)
+    = nav_link(html_options: { class: "separate-item" }) do
+      = link_to edit_group_path(@group), title: 'Settings' do
+        = icon ('cogs fw')
         %span
-          Members
-    - if can?(current_user, :admin_group, @group)
-      = nav_link(html_options: { class: "separate-item" }) do
-        = link_to edit_group_path(@group), title: 'Settings' do
-          = icon ('cogs fw')
-          %span
-            Settings
+          Settings
diff --git a/app/views/projects/_home_panel.html.haml b/app/views/projects/_home_panel.html.haml
index e8434b5292c..d4bbafbd40f 100644
--- a/app/views/projects/_home_panel.html.haml
+++ b/app/views/projects/_home_panel.html.haml
@@ -2,21 +2,21 @@
 .project-home-panel.cover-block.clearfix{:class => ("empty-project" if empty_repo)}
   .project-identicon-holder
     = project_icon(@project, alt: '', class: 'project-avatar avatar s90')
-  .cover-title#project-home-desc
+  .cover-title.project-home-desc
     %h1
       = @project.name
-      %span.visibility-icon.has_tooltip{data: { container: 'body' },
-        title: "#{visibility_level_label(@project.visibility_level)} - #{project_visibility_level_description(@project.visibility_level)}"}
+      %span.visibility-icon.has_tooltip{data: { container: 'body' }, title: project_visibility_icon_description(@project)}
         = visibility_level_icon(@project.visibility_level, fw: false)
 
-    - if @project.description.present?
+  - if @project.description.present?
+    .cover-desc.project-home-desc
       = markdown(@project.description, pipeline: :description)
 
-    - if forked_from_project = @project.forked_from_project
-      %p
-        Forked from
-        = link_to project_path(forked_from_project) do
-          = forked_from_project.namespace.try(:name)
+  - if forked_from_project = @project.forked_from_project
+    .cover-desc
+      Forked from
+      = link_to project_path(forked_from_project) do
+        = forked_from_project.namespace.try(:name)
 
   .cover-controls
     - if current_user
diff --git a/app/views/shared/groups/_group.html.haml b/app/views/shared/groups/_group.html.haml
index 67a59f420f3..03103d46bb9 100644
--- a/app/views/shared/groups/_group.html.haml
+++ b/app/views/shared/groups/_group.html.haml
@@ -21,7 +21,7 @@
       = icon('users')
       = number_with_delimiter(group.users.count)
 
-    %span{title: group_visibility_description(group)}
+    %span.visibility-icon.has_tooltip{data: { container: 'body', placement: 'left' }, title: group_visibility_icon_description(group)}
       = visibility_level_icon(group.visibility_level, fw: false)
 
   = image_tag group_icon(group), class: "avatar s40 hidden-xs"
diff --git a/app/views/shared/projects/_project.html.haml b/app/views/shared/projects/_project.html.haml
index 872d2bdf46d..3b987987676 100644
--- a/app/views/shared/projects/_project.html.haml
+++ b/app/views/shared/projects/_project.html.haml
@@ -27,8 +27,7 @@
         %span
           = icon('star')
           = project.star_count
-      %span.visibility-icon.has_tooltip{data: { container: 'body', placement: 'left' },
-        title: "#{visibility_level_label(project.visibility_level)} - #{project_visibility_level_description(project.visibility_level)}"}
+      %span.visibility-icon.has_tooltip{data: { container: 'body', placement: 'left' }, title: project_visibility_icon_description(project)}
         = visibility_level_icon(project.visibility_level, fw: false)
 
     .title