CE backport of ProtectedBranches API changes

In EE we now allow individual users/groups to be set on POST, which required some refactoring.
See https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/3516

app/services/protected_branches/access_level_params.rb

+module ProtectedBranches
+  class AccessLevelParams
+    attr_reader :type, :params
+
+    def initialize(type, params)
+      @type = type
+      @params = params_with_default(params)
+    end
+
+    def access_levels
+      ce_style_access_level
+    end
+
+    private
+
+    def params_with_default(params)
+      params[:"#{type}_access_level"] ||= Gitlab::Access::MASTER if use_default_access_level?(params)
+      params
+    end
+
+    def use_default_access_level?(params)
+      true
+    end
+
+    def ce_style_access_level
+      access_level = params[:"#{type}_access_level"]
+
+      return [] unless access_level
+
+      [{ access_level: access_level }]
+    end
+  end
+end

app/services/protected_branches/api_service.rb

+module ProtectedBranches
+  class ApiService < BaseService
+    def create
+      @push_params = AccessLevelParams.new(:push, params)
+      @merge_params = AccessLevelParams.new(:merge, params)
+
+      verify_params!
+
+      protected_branch_params = {
+        name: params[:name],
+        push_access_levels_attributes: @push_params.access_levels,
+        merge_access_levels_attributes: @merge_params.access_levels
+      }
+
+      ::ProtectedBranches::CreateService.new(@project, @current_user, protected_branch_params).execute
+    end
+
+    private
+
+    def verify_params!
+      # EE-only
+    end
+  end
+end

doc/api/protected_branches.md

@@ -136,7 +136,7 @@ DELETE /projects/:id/protected_branches/:name
 ```
 
 ```bash
-curl --request PUT --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" 'https://gitlab.example.com/api/v4/projects/5/protected_branches/*-stable'
+curl --request DELETE --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" 'https://gitlab.example.com/api/v4/projects/5/protected_branches/*-stable'
 ```
 
 | Attribute | Type | Required | Description |

lib/api/protected_branches.rb

@@ -39,10 +39,10 @@ module API
       end
       params do
         requires :name, type: String, desc: 'The name of the protected branch'
-        optional :push_access_level, type: Integer, default: Gitlab::Access::MASTER,
+        optional :push_access_level, type: Integer,
                                      values: ProtectedRefAccess::ALLOWED_ACCESS_LEVELS,
                                      desc: 'Access levels allowed to push (defaults: `40`, master access level)'
-        optional :merge_access_level, type: Integer, default: Gitlab::Access::MASTER,
+        optional :merge_access_level, type: Integer,
                                       values: ProtectedRefAccess::ALLOWED_ACCESS_LEVELS,
                                       desc: 'Access levels allowed to merge (defaults: `40`, master access level)'
       end
@@ -52,15 +52,13 @@ module API
           conflict!("Protected branch '#{params[:name]}' already exists")
         end
 
-        protected_branch_params = {
-          name: params[:name],
-          push_access_levels_attributes: [{ access_level: params[:push_access_level] }],
-          merge_access_levels_attributes: [{ access_level: params[:merge_access_level] }]
-        }
+        # Replace with `declared(params)` after updating to grape v1.0.2
+        # See https://github.com/ruby-grape/grape/pull/1710
+        # and https://gitlab.com/gitlab-org/gitlab-ce/issues/40843
+        declared_params = params.slice("name", "push_access_level", "merge_access_level", "allowed_to_push", "allowed_to_merge")
 
-        service_args = [user_project, current_user, protected_branch_params]
-
-        protected_branch = ::ProtectedBranches::CreateService.new(*service_args).execute
+        api_service = ::ProtectedBranches::ApiService.new(user_project, current_user, declared_params)
+        protected_branch = api_service.create
 
         if protected_branch.persisted?
           present protected_branch, with: Entities::ProtectedBranch, project: user_project

spec/requests/api/protected_branches_spec.rb

@@ -95,6 +95,12 @@ describe API::ProtectedBranches do
 
   describe 'POST /projects/:id/protected_branches' do
     let(:branch_name) { 'new_branch' }
+    let(:post_endpoint) { api("/projects/#{project.id}/protected_branches", user) }
+
+    def expect_protection_to_be_successful
+      expect(response).to have_gitlab_http_status(201)
+      expect(json_response['name']).to eq(branch_name)
+    end
 
     context 'when authenticated as a master' do
       before do
@@ -102,7 +108,7 @@ describe API::ProtectedBranches do
       end
 
       it 'protects a single branch' do
-        post api("/projects/#{project.id}/protected_branches", user), name: branch_name
+        post post_endpoint, name: branch_name
 
         expect(response).to have_gitlab_http_status(201)
         expect(json_response['name']).to eq(branch_name)
@@ -111,8 +117,7 @@ describe API::ProtectedBranches do
       end
 
       it 'protects a single branch and developers can push' do
-        post api("/projects/#{project.id}/protected_branches", user),
-            name: branch_name, push_access_level: 30
+        post post_endpoint, name: branch_name, push_access_level: 30
 
         expect(response).to have_gitlab_http_status(201)
         expect(json_response['name']).to eq(branch_name)
@@ -121,8 +126,7 @@ describe API::ProtectedBranches do
       end
 
       it 'protects a single branch and developers can merge' do
-        post api("/projects/#{project.id}/protected_branches", user),
-            name: branch_name, merge_access_level: 30
+        post post_endpoint, name: branch_name, merge_access_level: 30
 
         expect(response).to have_gitlab_http_status(201)
         expect(json_response['name']).to eq(branch_name)
@@ -131,8 +135,7 @@ describe API::ProtectedBranches do
       end
 
       it 'protects a single branch and developers can push and merge' do
-        post api("/projects/#{project.id}/protected_branches", user),
-            name: branch_name, push_access_level: 30, merge_access_level: 30
+        post post_endpoint, name: branch_name, push_access_level: 30, merge_access_level: 30
 
         expect(response).to have_gitlab_http_status(201)
         expect(json_response['name']).to eq(branch_name)
@@ -141,8 +144,7 @@ describe API::ProtectedBranches do
       end
 
       it 'protects a single branch and no one can push' do
-        post api("/projects/#{project.id}/protected_branches", user),
-            name: branch_name, push_access_level: 0
+        post post_endpoint, name: branch_name, push_access_level: 0
 
         expect(response).to have_gitlab_http_status(201)
         expect(json_response['name']).to eq(branch_name)
@@ -151,8 +153,7 @@ describe API::ProtectedBranches do
       end
 
       it 'protects a single branch and no one can merge' do
-        post api("/projects/#{project.id}/protected_branches", user),
-            name: branch_name, merge_access_level: 0
+        post post_endpoint, name: branch_name, merge_access_level: 0
 
         expect(response).to have_gitlab_http_status(201)
         expect(json_response['name']).to eq(branch_name)
@@ -161,8 +162,7 @@ describe API::ProtectedBranches do
       end
 
       it 'protects a single branch and no one can push or merge' do
-        post api("/projects/#{project.id}/protected_branches", user),
-            name: branch_name, push_access_level: 0, merge_access_level: 0
+        post post_endpoint, name: branch_name, push_access_level: 0, merge_access_level: 0
 
         expect(response).to have_gitlab_http_status(201)
         expect(json_response['name']).to eq(branch_name)
@@ -171,7 +171,8 @@ describe API::ProtectedBranches do
       end
 
       it 'returns a 409 error if the same branch is protected twice' do
-        post api("/projects/#{project.id}/protected_branches", user), name: protected_name
+        post post_endpoint, name: protected_name
+
         expect(response).to have_gitlab_http_status(409)
       end
 
@@ -179,10 +180,9 @@ describe API::ProtectedBranches do
         let(:branch_name) { 'feature/*' }
 
         it "protects multiple branches with a wildcard in the name" do
-          post api("/projects/#{project.id}/protected_branches", user), name: branch_name
+          post post_endpoint, name: branch_name
 
-          expect(response).to have_gitlab_http_status(201)
-          expect(json_response['name']).to eq(branch_name)
+          expect_protection_to_be_successful
           expect(json_response['push_access_levels'][0]['access_level']).to eq(Gitlab::Access::MASTER)
           expect(json_response['merge_access_levels'][0]['access_level']).to eq(Gitlab::Access::MASTER)
         end
@@ -195,7 +195,7 @@ describe API::ProtectedBranches do
       end
 
       it "returns a 403 error if guest" do
-        post api("/projects/#{project.id}/protected_branches/", user), name: branch_name
+        post post_endpoint, name: branch_name
 
         expect(response).to have_gitlab_http_status(403)
       end