Moved role protobuf into model

pkg/model/role.proto

@@ -0,0 +1,44 @@
+// Copyright 2020 The PipeCD Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package pipe.model;
+option go_package = "github.com/pipe-cd/pipe/pkg/model";
+
+import "google/protobuf/descriptor.proto";
+
+// Role contains a list of roles for a specified user.
+message Role {
+  enum ProjectRole {
+    // VIEWER has only permissions to view build log or build list.
+    VIEWER = 0;
+    // EDITOR has all viewer permissions, plus permissions for actions that modify state,
+    // such as sync the deployment state.
+    EDITOR = 1;
+    // ADMIN has all user permissions.
+    ADMIN = 2;
+  }
+
+  // project_id represents the ID of project account associated with this role.
+  string project_id = 1;
+  // project_role represents the roles you have in the project.
+  ProjectRole project_role = 2;
+}
+
+// Required role applied at the method level.
+extend google.protobuf.MethodOptions {
+  // Required role for ID token that will be checked before running RPC method.
+  Role role = 59090;
+}