← Google Drive + Gmail integrations

Send Email with Gmail API on Changes to Specific Files from Google Drive API

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Trigger workflow on
Changes to Specific Files from the Google Drive API
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Send Email with the Gmail API
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Getting Started

This integration creates a workflow with a Google Drive trigger and Gmail action. When you configure and deploy the workflow, it will run on Pipedream's servers 24x7 for free.

  1. Select this integration
  2. Configure the Changes to Specific Files trigger
    1. Connect your Google Drive account
    2. Optional- Configure Drive
    3. Optional- Configure Watch for changes to file properties
    4. Configure Push notification renewal schedule
    5. Optional- Select one or more Files
    6. Select one or more Types of updates
  3. Configure the Send Email action
    1. Connect your Gmail account
    2. Configure To
    3. Optional- Configure Cc
    4. Optional- Configure Bcc
    5. Optional- Configure From Name
    6. Optional- Configure Reply To
    7. Configure Subject
    8. Configure Email Body
    9. Optional- Select a Body Type
    10. Optional- Configure Attachments
    11. Optional- Configure In Reply To
    12. Optional- Select a Mime Type
  4. Deploy the workflow
  5. Send a test event to validate your setup
  6. Turn on the trigger

Details

This integration uses pre-built, source-available components from Pipedream's GitHub repo. These components are developed by Pipedream and the community, and verified and maintained by Pipedream.

To contribute an update to an existing component or create a new component, create a PR on GitHub. If you're new to Pipedream component development, you can start with quickstarts for trigger span and action development, and then review the component API reference.

Trigger

Description:Watches for changes to specific files, emitting an event any time a change is made to one of those files. To watch for changes to [shared drive](https://support.google.com/a/users/answer/9310351) files, use the **Changes to Specific Files (Shared Drive)** source instead.
Version:0.1.4
Key:google_drive-changes-to-specific-files

Google Drive Overview

The Google Drive API on Pipedream allows you to automate various file management tasks, such as creating, reading, updating, and deleting files within your Google Drive. You can also share files, manage permissions, and monitor changes to files and folders. This opens up possibilities for creating workflows that seamlessly integrate with other apps and services, streamlining document handling, backup processes, and collaborative workflows.

Trigger Code

import cronParser from "cron-parser";
import sampleEmit from "./test-event.mjs";
import includes from "lodash/includes.js";
import { v4 as uuid } from "uuid";

import { MY_DRIVE_VALUE } from "../../constants.mjs";

import changesToSpecificFiles from "../changes-to-specific-files-shared-drive/changes-to-specific-files-shared-drive.mjs";

/**
 * This source uses the Google Drive API's
 * {@link https://developers.google.com/drive/api/v3/reference/files/watch files: watch}
 * endpoint to subscribe to changes to specific files in the user's drive.
 */
export default {
  ...changesToSpecificFiles,
  key: "google_drive-changes-to-specific-files",
  name: "Changes to Specific Files",
  description: "Watches for changes to specific files, emitting an event any time a change is made to one of those files. To watch for changes to [shared drive](https://support.google.com/a/users/answer/9310351) files, use the **Changes to Specific Files (Shared Drive)** source instead.",
  version: "0.1.4",
  type: "source",
  // Dedupe events based on the "x-goog-message-number" header for the target channel:
  // https://developers.google.com/drive/api/v3/push#making-watch-requests
  dedupe: "unique",
  props: {
    ...changesToSpecificFiles.props,
    drive: {
      type: "string",
      label: "Drive",
      description: "Defaults to `My Drive`. To use a [Shared Drive](https://support.google.com/a/users/answer/9310351), use the **Changes to Specific Files (Shared Drive)** source instead.",
      optional: true,
      default: MY_DRIVE_VALUE,
    },
    updateTypes: {
      propDefinition: [
        changesToSpecificFiles.props.googleDrive,
        "updateTypes",
      ],
    },
  },
  hooks: {
    ...changesToSpecificFiles.hooks,
    async activate() {
      // Called when a component is created or updated. Handles all the logic
      // for starting and stopping watch notifications tied to the desired
      // files.

      // You can pass the same channel ID in watch requests for multiple files, so
      // our channel ID is fixed for this component to simplify the state we have to
      // keep track of.
      const channelID = this._getChannelID() || uuid();

      // Subscriptions are keyed on Google's resourceID, "an opaque value that
      // identifies the watched resource". This value is included in request
      // headers, allowing us to look up the watched resource.
      let subscriptions = this._getSubscriptions() || {};

      const files = this.files;
      for (const fileID of files) {
        const {
          expiration,
          resourceId,
        } = await this.googleDrive.activateFileHook(
          channelID,
          this.http.endpoint,
          fileID,
        );
        // The fileID must be kept with the subscription metadata so we can
        // renew the watch request for this specific file when it expires.
        subscriptions[resourceId] = {
          expiration,
          fileID,
        };
      }

      // Save metadata on the subscription so we can stop / renew later
      this._setSubscriptions(subscriptions);
      this._setChannelID(channelID);
    },
    async deactivate() {
      const channelID = this._getChannelID();
      if (!channelID) {
        console.log(
          "Channel not found, cannot stop notifications for non-existent channel",
        );
        return;
      }

      const subscriptions = this._getSubscriptions() || {};
      for (const resourceId of Object.keys(subscriptions)) {
        await this.googleDrive.stopNotifications(channelID, resourceId);
      }

      // Reset DB state
      this._setSubscriptions({});
      this._setChannelID(null);
    },
  },
  methods: {
    ...changesToSpecificFiles.methods,
    _getSubscriptions() {
      return this.db.get("subscriptions") || {};
    },
    _setSubscriptions(subscriptions) {
      this.db.set("subscriptions", subscriptions);
    },
    _getNextTimerEventTimestamp(event) {
      if (event.cron) {
        return cronParser
          .parseExpression(event.cron)
          .next()
          .getTime();
      }
      if (event.interval_seconds) {
        return Date.now() + event.interval_seconds * 1000;
      }
    },
    async renewFileSubscriptions(event) {
      // Assume subscription & channelID may all be undefined at
      // this point Handle their absence appropriately.
      const subscriptions = this._getSubscriptions() || {};
      const channelID = this._getChannelID() || uuid();

      const nextRunTimestamp = this._getNextTimerEventTimestamp(event);

      for (const [
        currentResourceId,
        metadata,
      ] of Object.entries(subscriptions)) {
        const { fileID } = metadata;

        const subscription = {
          ...metadata,
          resourceId: currentResourceId,
        };
        const {
          expiration,
          resourceId,
        } = await this.googleDrive.renewFileSubscription(
          subscription,
          this.http.endpoint,
          channelID,
          fileID,
          nextRunTimestamp,
        );
        subscriptions[resourceId] = {
          expiration,
          fileID,
        };
      }
      this._setSubscriptions(subscriptions);
      this._setChannelID(channelID);
    },
  },
  async run(event) {
    // This function is polymorphic: it can be triggered as a cron job, to make sure we renew
    // watch requests for specific files, or via HTTP request (the change payloads from Google)

    // Component was invoked by timer
    if (event.timestamp) {
      return this.renewFileSubscriptions(event);
    }

    const channelID = this._getChannelID();
    let subscriptions = this._getSubscriptions() || {};

    const { headers } = event;

    if (
      !headers["x-goog-resource-state"] ||
      !headers["x-goog-resource-id"] ||
      !headers["x-goog-resource-uri"] ||
      !headers["x-goog-message-number"]
    ) {
      console.log("Request missing necessary headers: ", headers);
      return;
    }

    const incomingChannelID = headers["x-goog-channel-id"];
    if (incomingChannelID !== channelID) {
      console.log(
        `Channel ID of ${incomingChannelID} not equal to deployed component channel of ${channelID}`,
      );
      return;
    }

    if (subscriptions[headers["x-goog-resource-id"]] === undefined) {
      console.log(
        `Resource ID of ${headers["x-goog-resource-id"]} not currently being tracked. Exiting`,
      );
      return;
    }

    if (!includes(this.updateTypes, headers["x-goog-resource-state"])) {
      console.log(
        `Update type ${headers["x-goog-resource-state"]} not in list of updates to watch: `,
        this.updateTypes,
      );
      return;
    }

    // We observed false positives where a single change to a document would trigger two changes:
    // one to "properties" and another to "content,properties". But changes to properties
    // alone are legitimate, most users just won't want this source to emit in those cases.
    // If x-goog-changed is _only_ set to "properties", only move on if the user set the prop
    if (
      !this.watchForPropertiesChanges &&
      headers["x-goog-changed"] === "properties"
    ) {
      console.log(
        "Change to properties only, which this component is set to ignore. Exiting",
      );
      return;
    }

    const file = await this.googleDrive.getFileMetadata(
      headers["x-goog-resource-uri"],
    );

    if (!file || !Object.keys(file).length) {
      console.log("No file metadata returned, nothing to emit");
      return;
    }

    this.processChange(file, headers);
  },
  sampleEmit,
};

Trigger Configuration

This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI and CLI.
LabelPropTypeDescription
Google DrivegoogleDriveappThis component uses the Google Drive app.
N/Adb$.service.dbThis component uses $.service.db to maintain state between executions.
N/Ahttp$.interface.httpThis component uses $.interface.http to generate a unique URL when the component is first instantiated. Each request to the URL will trigger the run() method of the component.
Drivedrivestring

Defaults to My Drive. To use a Shared Drive, use the Changes to Specific Files (Shared Drive) source instead.

Watch for changes to file propertieswatchForPropertiesChangesboolean

Watch for changes to file properties
in addition to changes to content. Defaults to false, watching for only changes to content.

Push notification renewal scheduletimer$.interface.timer

The Google Drive API requires occasional renewal of push notification subscriptions. This runs in the background, so you should not need to modify this schedule.

Filesfilesstring[]Select a value from the drop down menu.
Types of updatesupdateTypesstring[]Select a value from the drop down menu:syncaddremoveupdatetrashuntrashchange

Trigger Authentication

Google Drive uses OAuth authentication. When you connect your Google Drive account, Pipedream will open a popup window where you can sign into Google Drive and grant Pipedream permission to connect to your account. Pipedream securely stores and automatically refreshes the OAuth tokens so you can easily authenticate any Google Drive API.

Pipedream requests the following authorization scopes when you connect your account:

emailprofilehttps://www.googleapis.com/auth/drivehttps://www.googleapis.com/auth/drive.readonly

About Google Drive

Google Drive is a file storage and synchronization service which allows you to create and share your work online, and access your documents from anywhere.

Action

Description:Send an email from your Google Workspace email account
Version:0.1.1
Key:gmail-send-email

Gmail Overview

By connecting your personal Gmail account to Pipedream, you'll be able to incorporate email into whatever you're building with any of the thousands of apps that are available on Pipedream.

Action Code

/* eslint-disable pipedream/props-description */
import gmail from "../../gmail.app.mjs";

export default {
  key: "gmail-send-email",
  name: "Send Email",
  description: "Send an email from your Google Workspace email account",
  version: "0.1.1",
  type: "action",
  props: {
    gmail,
    to: {
      propDefinition: [
        gmail,
        "to",
      ],
    },
    cc: {
      propDefinition: [
        gmail,
        "cc",
      ],
    },
    bcc: {
      propDefinition: [
        gmail,
        "bcc",
      ],
    },
    fromName: {
      propDefinition: [
        gmail,
        "fromName",
      ],
    },
    replyTo: {
      propDefinition: [
        gmail,
        "replyTo",
      ],
    },
    subject: {
      propDefinition: [
        gmail,
        "subject",
      ],
    },
    body: {
      propDefinition: [
        gmail,
        "body",
      ],
    },
    bodyType: {
      propDefinition: [
        gmail,
        "bodyType",
      ],
    },
    attachments: {
      propDefinition: [
        gmail,
        "attachments",
      ],
    },
    inReplyTo: {
      propDefinition: [
        gmail,
        "inReplyTo",
      ],
    },
    mimeType: {
      propDefinition: [
        gmail,
        "mimeType",
      ],
    },
  },
  async run({ $ }) {
    const opts = await this.gmail.getOptionsToSendEmail($, this);
    const response = await this.gmail.sendEmail(opts);
    $.export("$summary", `Successfully sent email to ${this.to}`);
    return response;
  },
};

Action Configuration

This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI.

LabelPropTypeDescription
GmailgmailappThis component uses the Gmail app.
Totostring[]

Enter a single recipient's email or multiple emails as items in an array.

Ccccstring[]

Enter a single recipient's email or multiple emails as items in an array.

Bccbccstring[]

Enter a single recipient's email or multiple emails as items in an array.

From NamefromNamestring

Specify the name that will be displayed in the "From" section of the email.

Reply ToreplyTostring

Specify the email address that will appear on the "Reply-To" field, if different than the sender's email.

Subjectsubjectstring

Specify a subject for the email.

Email Bodybodyany

Include an email body as either plain text or HTML. If HTML, make sure to set the "Body Type" prop to html.

Body TypebodyTypestringSelect a value from the drop down menu:htmlplaintext
Attachmentsattachmentsobject

Add any attachments you'd like to include as objects. The key should be the filename and the value should be the url for the attachment. The filename must contain the file extension (i.e. .jpeg, .txt) and the url is the download link for the file.

In Reply ToinReplyTostring

Specify the message-id this email is replying to. Must be from the first message sent in the thread. To use this prop with async options please use Gmail (Developer App) Send Email component.

Mime TypemimeTypestringSelect a value from the drop down menu.

Action Authentication

Gmail uses OAuth authentication. When you connect your Gmail account, Pipedream will open a popup window where you can sign into Gmail and grant Pipedream permission to connect to your account. Pipedream securely stores and automatically refreshes the OAuth tokens so you can easily authenticate any Gmail API.

Pipedream requests the following authorization scopes when you connect your account:

emailprofilehttps://www.googleapis.com/auth/gmail.sendhttps://www.googleapis.com/auth/gmail.labels

About Gmail

Gmail offers private and secure email by Google at no cost, for business and consumer accounts.

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