Create a Gmail draft with attachments via Google Apps Script #gas #gmail

.en.md

Create a Gmail draft with attachments via Google Apps Script #gas #gmail

• Gmail API Users.drafts
• Multipurpose Internet Mail Extensions PART#1
• Multipurpose Internet Mail Extensions PART#2
• Media Types
• The contentType is now "message/rfc822" instead of "application/json" thanks Tholle from SO

How to use

Intro

Copy Message.gs to your project. You have to enable advanced services for Gmail API.

Be sure your project has next files:

• quoted-printable.js. Rename to gs.
• utf8.js. Rename to gs.

Additional

Clone

git clone https://gist.github.com/7e96514c3cb3075dde02.git

For biulds you have to have git & node & npm. Then you can

git clone https://gist.github.com/7e96514c3cb3075dde02.git && npm install

It's strange but it can be.

For the tests you need to connect the TestApp Library

Create a draft

var msg = new Message();
msg.to = '[email protected]';
msg.body = '<h1>TEST</h1>';
msg.subject = 'TEST';
var file = DriveApp.createFile('~myfile.txt', 'content' + new Date(), 'text/plain');
msg.attachments = [file];
msg.createDraft();

Define several attachments

msg.attachments = [File, File];

File is a file in Google Drive. Files can be accessed or created from DriveApp.

Create with existing file

var file = DriveApp.getFileById(id);
msg.attachments = [file];

Create with existing files from a folder

var filesi = DriveApp.getFolderById(id).getFilesByType('text/plain');
var files = [];
while(filesi.hasNext()){
    files.push(filesi.next());
}
msg.attachments = files;

Create as a thread's child

...
var thread = Gmail.Users.Threads.list('me').threads[0].id;
msg.threadId = thread;
var resp = msg.createDraft();

.gitignore

# npm
node_modules
npm-debug.log
# dependencies
utf8.gs
quoted-printable.gs
# node-google-apps-script
src
gapps.config.json
src0

Code.gs

/* CODE */

Message.gs

//JUST A GAG. DON'T USE FOR PRODUCTION
function Message() {
    // TODO separate methods
    function nonASCII(str) {
        return '=?UTF-8?B?' + Utilities.base64Encode(str, Utilities.Charset.UTF_8) + '?=';
    }
    this.to = '';
    this.subject = '';
    this.from = '';
    this.body = '';
    this.attachments = [];
    this.toRFC822 = function() {
        // var mt = new MimeType();
        var boundaryHL = 'b314159265359a';
        var separator = '\n';
        var rows = [];
        rows.push('MIME-Version: 1.0');
        rows.push('To: ' + this.to);
        rows.push('Subject: ' + nonASCII(this.subject));
        rows.push('From: ' + this.from);
        rows.push('Content-Type: multipart/mixed; boundary=' + boundaryHL + separator);
        rows.push('--' + boundaryHL);
        rows.push('Content-Type: text/html; charset=UTF-8');
        rows.push('Content-Transfer-Encoding: quoted-printable' + separator);
        rows.push(quotedPrintable.encode(utf8.encode(this.body)));
        for (var i = 0; i < this.attachments.length; i++) {
            rows.push('--' + boundaryHL);
            var fmt = this.attachments[i].getMimeType();
            var fn = this.attachments[i].getName();
            // var ffn = mt.getFullName(fn, fmt);
            // rows.push('Content-Type: ' + fmt + '; charset=UTF-8; name="' + ffn + '"');
            // rows.push('Content-Disposition: attachment; filename="' + ffn + '"');
            rows.push('Content-Type: ' + fmt + '; charset=UTF-8; name="' + fn + '"');
            rows.push('Content-Disposition: attachment; filename="' + fn + '"');
            rows.push('Content-Transfer-Encoding: base64' + separator);
            rows.push(Utilities.base64Encode(this.attachments[i].getBlob().getBytes()));
        }
        rows.push('--' + boundaryHL + '--');
        return rows.join(separator);
    }
    this.createDraft = function() {
        //var me = this;
        var message = {};
        message.raw = Utilities.base64EncodeWebSafe(this.toRFC822());
        if (this.threadId) message.threadId = this.threadId;
        var res = Gmail.Users.Drafts.create({
            'message': message
        }, 'me');

        return res;
    }
}

MimeType.min.gs

// JUST A GAG. DON'T USE
function MimeType(){this.library={"image/jpeg":{ext:"jpg"},"text/plain":{ext:"txt"}}}MimeType.prototype.getFullName=function(c,b){var d=this.library[b]||{ext:"unknown"};if(!c){return"noname."+b}var a=c.lastIndexOf(".");if(a>0){if(d.ext!="unknown"){return c}else{return c.substring(0,a+1)+d.ext}}return c+"."+d.ext};

package.json

{
    "name": "7e96514c3cb3075dde02",
    "version": "1.0.0",
    "description": "",
    "main": "index.js",
    "dependencies": {
        "utf8": "^2.1.1",
        "quoted-printable": "^1.0.0"
    },
    "devDependencies": {
        "del-cli": "^0.1.2",
        "ncp": "^2.0.0",
        "node-google-apps-script": "^1.1.4"
    },
    "scripts": {
        "test": "echo \"Error: no test specified\" && exit 1",
        "g": "gapps",
        "push": "git add . && git commit -a -m $1",
        "clear": "de *.gs",
        "copy": "ncp ./node_modules/utf8/utf8.js ./src/utf8.gs && ncp ./node_modules/quoted-printable/quoted-printable.js ./src/quoted-printable.gs && ncp ./src/ ./ --filter=.*",
        "build": "npm run clear && npm run copy && npm run push",
        "bp": "npm run build && git push"
    },
    "repository": {
        "type": "git",
        "url": "git+https://gist.github.com/7e96514c3cb3075dde02.git"
    },
    "author": "",
    "license": "MIT",
    "bugs": {
        "url": "https://gist.github.com/7e96514c3cb3075dde02"
    },
    "homepage": "https://gist.github.com/7e96514c3cb3075dde02"
}

tests.gs

/*
tests.gs are using TestApp

https://github.com/Spencer-Easton/Apps-Script-TestApp-Library.git
Apps-Script-TestApp-Library
TestApp is a service for unit testing in Google Apps Script.
It can be added with the key Mm17sZ23ccjNtfj2PvKV798h00DPSBbB3 or from the source in the src folder.
*/

/*
Wraps Message() and returns TRUE if a draft was established
*/
function messageWrapper1_() {

    var msg = new Message();
    msg.to = '[email protected]';
    msg.body = '<h1>TEST</h1><p>UNICODE АБВГДЕЁЪЫЮЭ</p>';
    msg.subject = 'TEST UNICODE ЩШЖЫФЫВАФОДЫВЩШЦУШ';
    var file1 = DriveApp.createFile(['runTests_', Utilities.formatDate(new Date, 'GMT', 'yyyy-MM-dd@hh_mm_ss'), '_testFile1.txt'].join(''), 'test file 1', 'text/plain');
    var file2 = DriveApp.createFile(['runTests_', Utilities.formatDate(new Date, 'GMT', 'yyyy-MM-dd@hh_mm_ss'), '_testFile2.txt'].join(''), 'test file 2', 'text/plain');
    msg.attachments = [file1, file2];
    var resp = msg.createDraft();
    return resp.hasOwnProperty('message') && resp.message.labelIds[0] == 'DRAFT';

}

/*
Tests runer
*/
function runTests() {

    var testObj = TestApp.TestBuilder();
    testObj.addFunction('messageWrapper1_', null, true);

    var tr = new TestApp.TestRunner(this); //global this
    tr.RunTest(testObj.TestObject(), checkResults_);
}

/*
Callback. Saves Logger.getLog() to root folder
*/
function checkResults_(testLog) {
    Logger.log("TESTS FAILED:");
    for (var test in testLog.getResults()) {
        if (testLog.getResults()[test].status == "FAILED") {
            Logger.log(testLog.getResults()[test]);
        }
    }

    Logger.log("TESTS PASSED:");
    for (var test in testLog.getResults()) {
        if (testLog.getResults()[test].status == "PASSED") {
            Logger.log(testLog.getResults()[test]);
        }
    }

    DriveApp.createFile(['runTests_', Utilities.formatDate(new Date, 'GMT', 'yyyy-MM-dd@hh_mm_ss'), '.txt'].join(''), Logger.getLog(), 'text/plain');

}

@jief666
You have to find threadId of the thread then push it into message as message.threadId = thread; Look at Create as a thread's child