How send Email using Gmail api in swift

Question

The Gmail Api has no clear documentation on how to do this, I have been trying with this but there are many things that are in the air.

I have sought external source

Answer 1

Here is the final solution I have finally make it work :

Podfile :

pod 'GoogleAPIClient/Gmail'

Sample Swift 5 code:

import Foundation
import GoogleAPIClient

class GMailManager {

    let service = GTLServiceGmail()

    func sendEmail() {

        guard let query = GTLQueryGmail.queryForUsersMessagesSend(with: nil) else {
            return
        }

        let gtlMessage = GTLGmailMessage()
        gtlMessage.raw = self.generateRawString()

        query.message = gtlMessage

        self.service.executeQuery(query, completionHandler: { (ticket, response, error) -> Void in
            print("ticket \(String(describing: ticket))")
            print("response \(String(describing: response))")
            print("error \(String(describing: error))")
        })
    }

    func generateRawString() -> String {

        let dateFormatter:DateFormatter = DateFormatter()
        dateFormatter.dateFormat = "EEE, dd MMM yyyy HH:mm:ss Z"; //RFC2822-Format
        let todayString:String = dateFormatter.string(from: NSDate() as Date)

        let rawMessage = "" +
            "Date: \(todayString)\r\n" +
            "From: \r\n" +
            "To: username \r\n" +
            "Subject: Test send email\r\n\r\n" +
            "Test body"

        print("message \(rawMessage)")

        return GTLEncodeWebSafeBase64(rawMessage.data(using: String.Encoding.utf8))
    }
}