Gmail addon createdraftreply() replying to yourself - gmail-addons

Question

I am referencing the official guide
here
to create a reply draft.
var composeAction = CardService.newAction()
.setFunctionName('createReplyDraft');
var composeButton = CardService.newTextButton()
.setText('Compose Reply')
.setComposeAction(composeAction, CardService.ComposedEmailType.REPLY_AS_DRAFT);
// ...
/**
* Creates a draft email (with an attachment and inline image)
* as a reply to an existing message.
* #param {Object} e data passed by the compose action.
* #return {ComposeActionResponse}
*/
function createReplyDraft(e) {
// Activate temporary Gmail add-on scopes, in this case to allow
// a reply to be drafted.
var accessToken = e.messageMetadata.accessToken;
GmailApp.setCurrentMessageAccessToken(accessToken);
// Creates a draft reply.
var messageId = e.messageMetadata.messageId;
var message = GmailApp.getMessageById(messageId);
var draft = message.createDraftReply('',
{
htmlBody: "Kitten! <img src='cid:kitten'/>",
attachments: [
UrlFetchApp.fetch('https://example.com/images/myDog.jpg')
.getBlob()
],
inlineImages: {
"kitten": UrlFetchApp.fetch('https://example.com/images/myKitten.jpg')
.getBlob()
}
}
);
// Return a built draft response. This causes Gmail to present a
// compose window to the user, pre-filled with the content specified
// above.
return CardService.newComposeActionResponseBuilder()
.setGmailDraft(draft).build();
}
It works fine when the last message in the thread is from the other person,
but when the last message is from yourself,
the recipient address of the new draft is your address, not the other person.
1.
(Last message) Other person → Me
createDraftReply()
(Draft) Me → Other person
2.
(Last message) Me → Other person
createDraftReply()
(Draft) Me → Me
How can I create a reply draft with the right recipient?

Answer 1

Before creating a reply draft check whether the TO address is self or not.
If TO is self, create reply all draft instead of reply draft
Else create reply draft.
if(message.getTo() === Session.getEffectiveUser().getEmail())
This is how you can check.
OR
There is one more way, you can iterate over all emails and pick the latest mail from the outsider and create a reply draft for it.
var mssgs = message.getThread().getMessages();