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+// Copyright 2019 Google LLC.
+//
+// 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 google.firestore.admin.v1beta2;
+
+import "google/firestore/admin/v1beta2/index.proto";
+import "google/protobuf/timestamp.proto";
+import "google/api/annotations.proto";
+
+option csharp_namespace = "Google.Cloud.Firestore.Admin.V1Beta2";
+option go_package = "google.golang.org/genproto/googleapis/firestore/admin/v1beta2;admin";
+option java_multiple_files = true;
+option java_outer_classname = "OperationProto";
+option java_package = "com.google.firestore.admin.v1beta2";
+option objc_class_prefix = "GCFS";
+
+
+// Metadata for [google.longrunning.Operation][google.longrunning.Operation] results from
+// [FirestoreAdmin.CreateIndex][google.firestore.admin.v1beta2.FirestoreAdmin.CreateIndex].
+message IndexOperationMetadata {
+  // The time this operation started.
+  google.protobuf.Timestamp start_time = 1;
+
+  // The time this operation completed. Will be unset if operation still in
+  // progress.
+  google.protobuf.Timestamp end_time = 2;
+
+  // The index resource that this operation is acting on. For example:
+  // `projects/{project_id}/databases/{database_id}/collectionGroups/{collection_id}/indexes/{index_id}`
+  string index = 3;
+
+  // The state of the operation.
+  OperationState state = 4;
+
+  // The progress, in documents, of this operation.
+  Progress progress_documents = 5;
+
+  // The progress, in bytes, of this operation.
+  Progress progress_bytes = 6;
+}
+
+// Metadata for [google.longrunning.Operation][google.longrunning.Operation] results from
+// [FirestoreAdmin.UpdateField][google.firestore.admin.v1beta2.FirestoreAdmin.UpdateField].
+message FieldOperationMetadata {
+  // Information about an index configuration change.
+  message IndexConfigDelta {
+    // Specifies how the index is changing.
+    enum ChangeType {
+      // The type of change is not specified or known.
+      CHANGE_TYPE_UNSPECIFIED = 0;
+
+      // The single field index is being added.
+      ADD = 1;
+
+      // The single field index is being removed.
+      REMOVE = 2;
+    }
+
+    // Specifies how the index is changing.
+    ChangeType change_type = 1;
+
+    // The index being changed.
+    Index index = 2;
+  }
+
+  // The time this operation started.
+  google.protobuf.Timestamp start_time = 1;
+
+  // The time this operation completed. Will be unset if operation still in
+  // progress.
+  google.protobuf.Timestamp end_time = 2;
+
+  // The field resource that this operation is acting on. For example:
+  // `projects/{project_id}/databases/{database_id}/collectionGroups/{collection_id}/fields/{field_path}`
+  string field = 3;
+
+  // A list of [IndexConfigDelta][google.firestore.admin.v1beta2.FieldOperationMetadata.IndexConfigDelta], which describe the intent of this
+  // operation.
+  repeated IndexConfigDelta index_config_deltas = 4;
+
+  // The state of the operation.
+  OperationState state = 5;
+
+  // The progress, in documents, of this operation.
+  Progress document_progress = 6;
+
+  // The progress, in bytes, of this operation.
+  Progress bytes_progress = 7;
+}
+
+// Metadata for [google.longrunning.Operation][google.longrunning.Operation] results from
+// [FirestoreAdmin.ExportDocuments][google.firestore.admin.v1beta2.FirestoreAdmin.ExportDocuments].
+message ExportDocumentsMetadata {
+  // The time this operation started.
+  google.protobuf.Timestamp start_time = 1;
+
+  // The time this operation completed. Will be unset if operation still in
+  // progress.
+  google.protobuf.Timestamp end_time = 2;
+
+  // The state of the export operation.
+  OperationState operation_state = 3;
+
+  // The progress, in documents, of this operation.
+  Progress progress_documents = 4;
+
+  // The progress, in bytes, of this operation.
+  Progress progress_bytes = 5;
+
+  // Which collection ids are being exported.
+  repeated string collection_ids = 6;
+
+  // Where the entities are being exported to.
+  string output_uri_prefix = 7;
+}
+
+// Metadata for [google.longrunning.Operation][google.longrunning.Operation] results from
+// [FirestoreAdmin.ImportDocuments][google.firestore.admin.v1beta2.FirestoreAdmin.ImportDocuments].
+message ImportDocumentsMetadata {
+  // The time this operation started.
+  google.protobuf.Timestamp start_time = 1;
+
+  // The time this operation completed. Will be unset if operation still in
+  // progress.
+  google.protobuf.Timestamp end_time = 2;
+
+  // The state of the import operation.
+  OperationState operation_state = 3;
+
+  // The progress, in documents, of this operation.
+  Progress progress_documents = 4;
+
+  // The progress, in bytes, of this operation.
+  Progress progress_bytes = 5;
+
+  // Which collection ids are being imported.
+  repeated string collection_ids = 6;
+
+  // The location of the documents being imported.
+  string input_uri_prefix = 7;
+}
+
+// Returned in the [google.longrunning.Operation][google.longrunning.Operation] response field.
+message ExportDocumentsResponse {
+  // Location of the output files. This can be used to begin an import
+  // into Cloud Firestore (this project or another project) after the operation
+  // completes successfully.
+  string output_uri_prefix = 1;
+}
+
+// Describes the state of the operation.
+enum OperationState {
+  // Unspecified.
+  OPERATION_STATE_UNSPECIFIED = 0;
+
+  // Request is being prepared for processing.
+  INITIALIZING = 1;
+
+  // Request is actively being processed.
+  PROCESSING = 2;
+
+  // Request is in the process of being cancelled after user called
+  // google.longrunning.Operations.CancelOperation on the operation.
+  CANCELLING = 3;
+
+  // Request has been processed and is in its finalization stage.
+  FINALIZING = 4;
+
+  // Request has completed successfully.
+  SUCCESSFUL = 5;
+
+  // Request has finished being processed, but encountered an error.
+  FAILED = 6;
+
+  // Request has finished being cancelled after user called
+  // google.longrunning.Operations.CancelOperation.
+  CANCELLED = 7;
+}
+
+// Describes the progress of the operation.
+// Unit of work is generic and must be interpreted based on where [Progress][google.firestore.admin.v1beta2.Progress]
+// is used.
+message Progress {
+  // The amount of work estimated.
+  int64 estimated_work = 1;
+
+  // The amount of work completed.
+  int64 completed_work = 2;
+}