CODEWITHSUNDEEP
google-apps-scriptgmail-addons
ack_inc
ack_inc

Reputation: 1103

Composing a draft email from my gmail addon

I'm using the example here to guide me as I write code to compose a standalone draft email using user input values from my gmail addon.

Here's the button widget that should create the draft:

var submitButton = CardService.newTextButton()
    .setTextButtonStyle(CardService.TextButtonStyle.FILLED)
    .setText('Create Draft')
    .setComposeAction(
        CardService.newAction().setFunctionName("createEmailDraft"),
        CardService.ComposedEmailType.STANDALONE_DRAFT
    );

And here's the callback:

function createEmailDraft(e) {
    var recipient = e.formInput.recipient;
    var subject = e.formInput.subject;
    var body = e.formInput.body;

    var draft = GmailApp.createDraft(recipient, subject, body);
    return CardService.newComposeActionResponseBuilder()
        .setGmailDraft(draft).build();
}

I keep encountering the following error:

Access denied: : Missing access token for authorization. Request: MailboxService.CreateDraft.

My scopes seem alright (overly permissive if anything):

"oauthScopes": [
    "https://mail.google.com/",
    "https://www.googleapis.com/auth/gmail.addons.execute",
    "https://www.googleapis.com/auth/gmail.addons.current.action.compose",
    "https://www.googleapis.com/auth/script.external_request"
],

I would greatly appreciate any help getting past this error!

Upvotes: 1

Views: 668

Answers (1)

Chris
Chris

Reputation: 2107

This one is a bit deeper in the documentation, but you must use the access token in the callback Action event to authorize the draft creation:

function createEmailDraft(e) {
    var accessToken = e.messageMetadata.accessToken;
    GmailApp.setCurrentMessageAccessToken(accessToken);

    var recipient = e.formInput.recipient;
    var subject = e.formInput.subject;
    var body = e.formInput.body;

    var draft = GmailApp.createDraft(recipient, subject, body);
    return CardService.newComposeActionResponseBuilder()
        .setGmailDraft(draft).build();
}

Upvotes: 2

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