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In un componente aggiuntivo di Google Workspace puoi creare widget
con azioni collegate. Puoi utilizzare
un'azione per comporre nuove bozze di email, riempiendole facoltativamente con
le informazioni inserite nell'interfaccia utente del componente aggiuntivo o con le informazioni di un messaggio aperto.
Ad esempio, puoi avere un pulsante nell'interfaccia utente dei messaggi del componente aggiuntivo che crea una risposta al messaggio attualmente aperto precompilata con le informazioni del componente aggiuntivo.
Quando viene attivata un'azione che crea messaggi, Gmail esegue una funzione di callback
per creare e restituire la bozza. Gmail visualizza quindi la bozza nella sua
interfaccia utente in una finestra di composizione email standard, che l'utente può modificare e inviare
in base alle esigenze.
Configurazione di un'azione per creare una bozza di messaggio
Per configurare un widget in modo che avvii un'azione di creazione di bozze quando viene selezionato, devi
fare quanto segue:
Implementa la funzione di callback che esegue l'azione di creazione della bozza. Questa
funzione riceve un oggetto evento
come argomento. La funzione di callback deve:
Puoi precompilare l'GmailDraft
che crei nella funzione di callback con
destinatari, un oggetto, un corpo del messaggio e allegati. Per compilare la bozza, i dati possono provenire da qualsiasi origine, ma in genere derivano da informazioni fornite al componente aggiuntivo stesso, da informazioni nel messaggio aperto o da informazioni raccolte da un servizio di terze parti. L'oggetto evento passato alla funzione di callback contiene l'ID messaggio aperto e altre informazioni sul componente aggiuntivo che puoi utilizzare per precompilare la bozza.
Puoi creare la bozza come nuovo messaggio autonomo o come risposta a un messaggio esistente. Questo aspetto è controllato dall'enumerazione
ComposeEmailType
fornita a
setComposeAction().
Puoi creare bozze di risposta come risposte singole o messaggi "Rispondi a tutti".
Bozze autonome
Una bozza autonoma avvia un nuovo thread e non è una risposta a un messaggio esistente. Puoi creare una bozza autonoma con una delle seguenti funzioni del servizio Gmail:
Una bozza di risposta fa parte di un thread di messaggi esistente. Le bozze di risposta sono
risposte singole che vengono inviate solo al mittente di un messaggio o bozze di "Rispondi a tutti"
che vengono inviate a tutti coloro che hanno ricevuto il messaggio. Puoi creare una bozza di risposta con una di queste funzioni del servizio Gmail:
[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Mancano le informazioni di cui ho bisogno","missingTheInformationINeed","thumb-down"],["Troppo complicato/troppi passaggi","tooComplicatedTooManySteps","thumb-down"],["Obsoleti","outOfDate","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Problema relativo a esempi/codice","samplesCodeIssue","thumb-down"],["Altra","otherDown","thumb-down"]],["Ultimo aggiornamento 2025-07-25 UTC."],[[["\u003cp\u003eThis guide explains how to use Google Workspace add-ons to create new email drafts prefilled with information from the add-on or the currently open message.\u003c/p\u003e\n"],["\u003cp\u003eAdd-ons achieve this functionality by using actions associated with widgets like buttons, triggering callback functions to build and return drafts.\u003c/p\u003e\n"],["\u003cp\u003eTo implement this, you need to include a specific scope in your manifest, create an action object with a callback function, and configure the widget to trigger the action.\u003c/p\u003e\n"],["\u003cp\u003eThe callback function creates a GmailDraft object, builds a ComposeActionResponse, and can prefill the draft with data from various sources.\u003c/p\u003e\n"],["\u003cp\u003eDrafts can be created as standalone messages or replies (single or reply-all) using corresponding Gmail service functions.\u003c/p\u003e\n"]]],["Google Workspace add-ons can create new email drafts via linked actions in widgets. To configure this, the manifest needs the `action.compose` scope. A widget's `setComposeAction()` method links an `Action` object and `ComposeEmailType` to a callback function. This function generates a `GmailDraft` object using a `ComposeActionResponseBuilder`, which is then returned to populate the draft in Gmail's UI. Drafts can be standalone or replies, prefilled with data from various sources, including the event object.\n"],null,["# Composing draft messages\n\n| **Note:** The techniques described in this guide are primarily for creating new draft messages in response to user interactions in a [message UI](/workspace/add-ons/gmail/extending-message-ui). If you want your add-on to alter a draft the user is currently viewing, [extend the compose UI](/workspace/add-ons/gmail/extending-compose-ui) instead.\n\nIn a Google Workspace add-on you can create [widgets](/workspace/add-ons/concepts/widgets)\nthat have linked [actions](/workspace/add-ons/concepts/actions). You can use\nan action to compose new email drafts, optionally filling them using\ninformation entered into the add-on UI or information from an open message.\nFor example, you can have a button in your\n[add-on's message UI](/workspace/add-ons/gmail/extending-message-ui)\nthat creates a reply to the currently opened message prepopulated with\ninformation from the add-on.\n\nWhen an action that builds messages is triggered, Gmail executes a callback\nfunction to build and return the draft. Gmail then displays that draft in its\nUI in a standard email compose window, which the user can then edit and send\nas needed.\n\nConfiguring an action to build a draft message\n----------------------------------------------\n\nTo configure a widget to start a draft-building action when selected, you must\ndo the following:\n\n1. Make sure your [manifest](/workspace/add-ons/concepts/workspace-manifests#manifest_structure_for_g_suite_add-ons)\n includes the\n [`action.compose` scope](/workspace/add-ons/concepts/workspace-scopes#gmail_add-on_scopes):\n\n `https://www.googleapis.com/auth/gmail.addons.current.action.compose`\n\n You can use more a permissive scope instead, but should only do so if\n that scope is absolutely necessary.\n2. Create an [`Action`](/apps-script/reference/card-service/action) object\n and associate it with a [callback function](/workspace/add-ons/concepts/actions#callback_functions)\n you define.\n\n3. Call the widget's [`setComposeAction()`](/apps-script/reference/card-service/button#setComposeAction(Action,ComposedEmailType))\n [widget handler function](/workspace/add-ons/concepts/actions#widget_handler_functions),\n providing it the [`Action`](/apps-script/reference/card-service/action)\n object and specifying the\n [`ComposeEmailType`](/apps-script/reference/card-service/composed-email-type).\n\n4. Implement the callback function that executes the draft-building action. This\n function is given an [event object](/workspace/add-ons/concepts/actions#action_event_objects)\n as an argument. The callback function must do the following:\n\n 1. Create a [`GmailDraft`](/apps-script/reference/gmail/gmail-draft) object.\n 2. Build a [`ComposeActionResponse`](/apps-script/reference/card-service/compose-action-response) object using the [`ComposeActionResponseBuilder`](/apps-script/reference/card-service/compose-action-response-builder) class and the [`GmailDraft`](/apps-script/reference/gmail/gmail-draft) object.\n 3. Return the built [`ComposeActionResponse`](/apps-script/reference/card-service/compose-action-response).\n\nYou can prefill the [`GmailDraft`](/apps-script/reference/gmail/gmail-draft)\nyou create in the callback function with\nrecipients, a subject, a message body, and attachments. To fill in the draft,\ndata can come from any source, but typically it derives from information\nprovided to the add-on itself, information in the open message, or\ninformation gathered from a third-party service. The\n[event object](/workspace/add-ons/concepts/event-objects)\npassed to the callback function contains the open message ID and other add-on\ninformation you can use to prefill the draft.\n\nYou can create the draft as a new standalone message or a reply to\nan existing message. This is controlled by the\n[`ComposeEmailType`](/apps-script/reference/card-service/composed-email-type)\nenum given to the\n[`setComposeAction()`](/apps-script/reference/card-service/button#setComposeAction(Action,ComposedEmailType)).\nYou can create reply drafts as single replies or 'reply-all' messages.\n\n### Standalone drafts\n\nA standalone draft starts a new thread and isn't a reply to any existing\nmessage. You can create a standalone draft with one of the following\n[Gmail service](/apps-script/reference/gmail) functions:\n\n- [`GmailApp.createDraft(recipient, subject, body)`](/apps-script/reference/gmail/gmail-app#createDraft(String,String,String))\n- [`GmailApp.createDraft(recipient, subject, body, options)`](/apps-script/reference/gmail/gmail-app#createdraftrecipient-subject-body-options)\n\n### Reply drafts\n\nA reply draft is part of an existing message thread. Reply drafts are either\nsingle replies that only get sent to the sender of a message or \"reply all\"\ndrafts that get sent to everyone who received that message. You can create a\nreply draft with one of these [Gmail service](/apps-script/reference/gmail)\nfunctions:\n\n- [`GmailMessage.createDraftReply(body)`](/apps-script/reference/gmail/gmail-message#createdraftreplybody)\n- [`GmailMessage.createDraftReply(body, options)`](/apps-script/reference/gmail/gmail-message#createdraftreplybody-options)\n- [`GmailMessage.createDraftReplyAll(body)`](/apps-script/reference/gmail/gmail-message#createdraftreplyallbody)\n- [`GmailMessage.createDraftReplyAll(body, options)`](/apps-script/reference/gmail/gmail-message#createdraftreplyallbody-options)\n- [`GmailThread.createDraftReply(body)`](/apps-script/reference/gmail/gmail-thread#createdraftreplybody)\n- [`GmailThread.createDraftReply(body, options)`](/apps-script/reference/gmail/gmail-thread#createdraftreplybody-options)\n- [`GmailThread.createDraftReplyAll(body)`](/apps-script/reference/gmail/gmail-thread#createdraftreplyallbody)\n- [`GmailThread.createDraftReplyAll(body, options)`](/apps-script/reference/gmail/gmail-thread#createdraftreplyallbody-options)\n\nExample\n-------\n\nThe following code snippet shows how to assign an action that builds a reply\ndraft to a button. \n\n var composeAction = CardService.newAction()\n .setFunctionName('createReplyDraft');\n var composeButton = CardService.newTextButton()\n .setText('Compose Reply')\n .setComposeAction(\n composeAction,\n CardService.ComposedEmailType.REPLY_AS_DRAFT);\n\n // ...\n\n /**\n * Creates a draft email (with an attachment and inline image)\n * as a reply to an existing message.\n * @param {Object} e An event object passed by the action.\n * @return {ComposeActionResponse}\n */\n function createReplyDraft(e) {\n // Activate temporary Gmail scopes, in this case to allow\n // a reply to be drafted.\n var accessToken = e.gmail.accessToken;\n GmailApp.setCurrentMessageAccessToken(accessToken);\n\n // Creates a draft reply.\n var messageId = e.gmail.messageId;\n var message = GmailApp.getMessageById(messageId);\n var draft = message.createDraftReply('',\n {\n htmlBody: \"Kitten! \u003cimg src='cid:kitten'/\u003e\",\n attachments: [\n UrlFetchApp.fetch('https://example.com/images/myDog.jpg')\n .getBlob()\n ],\n inlineImages: {\n \"kitten\": UrlFetchApp.fetch('https://example.com/images/myKitten.jpg')\n .getBlob()\n }\n }\n );\n\n // Return a built draft response. This causes Gmail to present a\n // compose window to the user, pre-filled with the content specified\n // above.\n return CardService.newComposeActionResponseBuilder()\n .setGmailDraft(draft).build();\n }"]]