Batch-Requests-for-Drive-API-using-Google-Apps-Script

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Batch-Requests-for-Drive-API-using-Google-Apps-Script

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These are the sample scripts of the batch requests for Drive API using Google Apps Script.

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# Batch Requests for Drive API using Google Apps Script

[![MIT License](http://img.shields.io/badge/license-MIT-blue.svg?style=flat)](https://raw.githubusercontent.com/tanaikech/Batch-Requests-for-Drive-API-using-Google-Apps-Script/master/LICENCE)

## Overview

**These are the sample scripts of the batch requests for Drive API using Google Apps Script.**

## Description

When we want to manage the files and folders on Google Drive, we have 2 ways. One is the use of [Drive service](https://developers.google.com/apps-script/reference/drive). Another is the use of [Drive API](https://developers.google.com/drive). In the case of them, when we want to manage a lot of files and folders, unfortunately, both ways have no batch requests. Namely, for example, the metadata of a lot of files are changed, [the methods in Class File](https://developers.google.com/apps-script/reference/drive/file) and [Files: update](https://developers.google.com/drive/api/v3/reference/files/update) are required to be used in the loop. In this case, the process cost will be high. On the other hand, Drive API can use [the batch requests](https://developers.google.com/drive/api/v3/batch). But in this case, in order to use this batch requests with Google Apps Script, it is required to create the request body of `multipart/mixed` by each user. Because there are no methods for automatically requests the batch requests. From this situation, here, I would like to introduce the simple sample scripts for creating, updating and deleting the files and folders on Google Drive using the batch requests with Google Apps Script.

## Usage

The sample scripts use [BatchRequest](https://github.com/tanaikech/BatchRequest) of the Google Apps Script library.

### 1. Install BatchRequest

You can see how to install BatchRequest at [here](https://github.com/tanaikech/BatchRequest#how-to-install).

### 2. Sample script

#### Deleting files

In this sample script, the files are deleted. So when you use this, please be careful. I recommend to use a sample file.

```javascript
function deleteFiles() {
  const fileIds = [
    "### fileId 1###",
    "### fileId 2###",
    "### fileId 2###",
    ,
    ,
    ,
  ];

#### Changing file metadata

In this sample script, the files are moved to the specific folder by changing the filename. So when you use this, please be careful. I recommend to use a sample file.

```javascript
function moveFilesAndChangeFileNames() {
  const fileIds = [
    { id: "### fileId 1###", newName: "sample1" },
    { id: "### fileId 2###", newName: "sample2" },
    { id: "### fileId 3###", newName: "sample3" },
    ,
    ,
    ,
  ];
  const sourceFolderId = "###"; // Ser source folder ID.
  const destinationFolderId = "###"; // Set destination folder ID.

#### Copying files by converting mimeType

In this sample script, the Excel files are copied to the specific folder as the Google Spreadsheet.

```javascript
function copyAndConvertFiles() {
  const fileIds = [
    "### fileId 1###",
    "### fileId 2###",
    "### fileId 2###",
    ,
    ,
    ,
  ];
  const destinationFolderId = "###"; // Set destination folder ID.

#### Creating permission to multiple files

In this sample script, the permission is created for an user to the multiple files.

```javascript
function createPermissions1() {
  const fileIds = [
    {
      id: "### fileId 1###",
      role: "reader",
      type: "user",
      email: "###",
    },
    {
      id: "### fileId 2###",
      role: "reader",
      type: "user",
      email: "###",
    },
    {
      id: "### fileId 3###",
      role: "writer",
      type: "user",
      email: "###",
    },
    ,
    ,
    ,
  ];

#### Creating permissions to a file

In this sample script, the permissions are created for multiple users to a file.

```javascript
function createPermissions2() {
  const sourceFileId = "###"; // Set source file ID.
  const fileIds = [
    { role: "reader", type: "user", email: "### email 1 ###" },
    { role: "writer", type: "user", email: "### email 2 ###" },
    { role: "writer", type: "user", email: "### email 3 ###" },
    ,
    ,
    ,
  ];

#### Retrieving permission list from multiple files

In this sample script, the permission list is retrieved from multiple files.

```javascript
function getPermissionList() {
  const fileIds = [
    "### fileId 1###",
    "### fileId 2###",
    "### fileId 2###",
    ,
    ,
    ,
  ];

#### Deleting all permissions from multiple files

In this sample script, all permissions are deleted from multiple files. So when you use this, please be careful. I recommend to use a sample file.

```javascript
function deleteAllPermissionsFromFiles() {
  // Retrieve the permission list.
  const fileIds = [
    "### fileId 1###",
    "### fileId 2###",
    "### fileId 2###",
    ,
    ,
    ,
  ];

// Delete all permissions from all files.
  const requests2 = list.map(({ id, permissionId }) => ({
    method: "DELETE",
    endpoint: `https://www.googleapis.com/drive/v3/files/${id}/permissions/${permissionId}`,
  }));
  const res = BatchRequest.EDo({
    batchPath: "batch/drive/v3",
    requests: requests2,
  });
  console.log(res);
}
```

#### Updating permissions of multiple files

In this sample script, the permissions of multiple files are updated. The permissions of user of `"### email address ###"` are modified. So when you use this, please be careful. I recommend to use a sample file.

```javascript
function changePermissionsOfFiles() {
  // In this case, the role of the usef of email is changed from 'reader' to 'writer' for all files of fileIds.
  const change = { role: "writer", email: "### email address ###" };

// Retrieve the permission list.
  const fileIds = [
    "### fileId 1###",
    "### fileId 2###",
    "### fileId 2###",
    ,
    ,
    ,
  ];

// Delete all permissions from all files.
  const requests2 = list.map(({ id, permissionId }) => ({
    method: "PATCH",
    endpoint: `https://www.googleapis.com/drive/v3/files/${id}/permissions/${permissionId}`,
    requestBody: { role: change.role },
  }));
  const res = BatchRequest.EDo({
    batchPath: "batch/drive/v3",
    requests: requests2,
  });
  console.log(res);
}
```

#### Transferring owner of files

In this sample script, the owner of files are transferred to the user of `"### email address ###"`. So when you use this, please be careful. I recommend to use a sample file.

When I tested this at January 31, 2020, an error like `there is no function to change the owner of this item yet (currently under development)` occurred. But now, I could confirm that this got to be able to be used. By this, the owner of a lot of files can be transferred by reducing both the process cost and the quota cost.

```javascript
function changeOwnerOfFiles() {
  const email = "### email address ###"; // Please set the email you want to give the owner permission.
  const fileIds = [
    "### fileId 1###",
    "### fileId 2###",
    "### fileId 2###",
    ,
    ,
    ,
  ];

- When `sendNotificationEmail=false` is used, an error of `The sendNotificationEmail parameter is only applicable for permissions of type 'user' or 'group', and must not be disabled for ownership transfers.` occurs. So please be careful this.

## IMPORTANT

- At the batch requests, 100 API requests can be run with the asynchronous process as one API call.

- When the library of [BatchRequest](https://github.com/tanaikech/BatchRequest) is used, all requests can be processed in the library, even when the number of your requests is more than 100.

- When you manage a lot of files using Drive API, please be careful of Quotas for Google Services. [Ref](https://developers.google.com/apps-script/guides/services/quotas)

## References:

- [Files: delete](https://developers.google.com/drive/api/v3/reference/files/delete)
- [Files: update](https://developers.google.com/drive/api/v3/reference/files/update)
- [Files: copy](https://developers.google.com/drive/api/v3/reference/files/copy)
- [Permissions: create](https://developers.google.com/drive/api/v3/reference/permissions/create)
- [Permissions: list](https://developers.google.com/drive/api/v3/reference/permissions/list)
- [Permissions: delete](https://developers.google.com/drive/api/v3/reference/permissions/delete)
- [Permissions: update](https://developers.google.com/drive/api/v3/reference/permissions/update)

---

# Licence

[MIT](LICENCE)

# Author

[Tanaike](https://tanaikech.github.io/about/)

If you have any questions or comments, feel free to contact me.

# Update History

- v1.0.0 (June 15, 2020)

1. Initial release.

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