使用 Apps Script 建構 Google Workspace 外掛程式

本快速入門導覽課程會建立一個簡單的 Google Workspace 外掛程式,說明 首頁、內容觸發條件,以及連結至第三方 API。

這個外掛程式能建立情境式和非情境資訊 介面。 這個外掛程式能顯示 疊加在圖片上的文字文字為首頁靜態或擷取自 內容觸發條件的主機應用程式結構定義

目標

  • 設定環境。
  • 設定指令碼。
  • 執行指令碼。

必要條件

如要使用這個範例,您必須具備下列先決條件:

  • Google 帳戶 (Google Workspace 帳戶可能會 需要管理員核准)。
  • 可存取網際網路的網路瀏覽器。

  • Google Cloud 專案

設定環境

在 Google Cloud 控制台中開啟 Cloud 專案

如果沒有開啟,請開啟您要使用的 Cloud 專案 定義:

  1. 在 Google Cloud 控制台中,前往「選取專案」頁面。

    選取 Cloud 專案

  2. 選取要使用的 Google Cloud 專案。或是按一下「建立專案」,然後按照畫面上的指示操作。如要建立 Google Cloud 專案,您可能需要開啟該專案的計費功能

必須為 Google Workspace 外掛程式設定同意畫面。設定中 您外掛程式的 OAuth 同意畫面會定義 Google 向使用者顯示

  1. 在 Google Cloud 控制台中,前往「選單」圖示 > API 與服務 >「OAuth 同意畫面」

    前往 OAuth 同意畫面

  2. 在「使用者類型」部分選取「內部」,然後按一下「建立」
  3. 填寫應用程式註冊表單,然後按一下「Save and Continue」
  4. 您現在可以略過新增範圍的步驟,然後按一下「儲存並繼續」。 日後您可以製作並使用應用程式 Google Workspace 機構,您必須將「使用者類型」變更為「外部」, 新增應用程式所需的授權範圍。

  5. 查看應用程式註冊摘要。如要修改資訊,請按一下「編輯」。如果應用程式 註冊看起來沒有問題,請按一下 [返回資訊主頁]

設定指令碼

建立 Apps Script 專案

  1. 如要建立新的 Apps Script 專案,請前往 script.new.
  2. 按一下「未命名的專案」
  3. 將 Apps Script 專案「Cats」重新命名,然後按一下「重新命名」
  4. 按一下 Code.gs 檔案旁邊的「更多」圖示 >> [重新命名]。命名檔案 Common
  5. 按一下「新增檔案」圖示 >「指令碼」。命名檔案 Gmail
  6. 重複步驟 5,建立另外 2 個名稱為 CalendarDrive 的指令碼檔案。 完成後,您會需要 4 個不同的指令碼檔案。
  7. 將每個檔案的內容替換為以下對應的程式碼:

    Common.gs

      /**
     * This simple Google Workspace Add-on shows a random image of a cat in the
     * sidebar. When opened manually (the homepage card), some static text is
     * overlayed on the image, but when contextual cards are opened a new cat image
     * is shown with the text taken from that context (such as a message's subject
     * line) overlaying the image. There is also a button that updates the card with
     * a new random cat image.
     *
     * Click "File > Make a copy..." to copy the script, and "Publish > Deploy from
     * manifest > Install add-on" to install it.
     */
    
    /**
     * The maximum number of characters that can fit in the cat image.
     */
    var MAX_MESSAGE_LENGTH = 40;
    
    /**
     * Callback for rendering the homepage card.
     * @return {CardService.Card} The card to show to the user.
     */
    function onHomepage(e) {
      console.log(e);
      var hour = Number(Utilities.formatDate(new Date(), e.userTimezone.id, 'H'));
      var message;
      if (hour >= 6 && hour < 12) {
        message = 'Good morning';
      } else if (hour >= 12 && hour < 18) {
        message = 'Good afternoon';
      } else {
        message = 'Good night';
      }
      message += ' ' + e.hostApp;
      return createCatCard(message, true);
    }
    
    /**
     * Creates a card with an image of a cat, overlayed with the text.
     * @param {String} text The text to overlay on the image.
     * @param {Boolean} isHomepage True if the card created here is a homepage;
     *      false otherwise. Defaults to false.
     * @return {CardService.Card} The assembled card.
     */
    function createCatCard(text, isHomepage) {
      // Explicitly set the value of isHomepage as false if null or undefined.
      if (!isHomepage) {
        isHomepage = false;
      }
    
      // Use the "Cat as a service" API to get the cat image. Add a "time" URL
      // parameter to act as a cache buster.
      var now = new Date();
      // Replace forward slashes in the text, as they break the CataaS API.
      var caption = text.replace(/\//g, ' ');
      var imageUrl =
          Utilities.formatString('https://cataas.com/cat/says/%s?time=%s',
              encodeURIComponent(caption), now.getTime());
      var image = CardService.newImage()
          .setImageUrl(imageUrl)
          .setAltText('Meow')
    
      // Create a button that changes the cat image when pressed.
      // Note: Action parameter keys and values must be strings.
      var action = CardService.newAction()
          .setFunctionName('onChangeCat')
          .setParameters({text: text, isHomepage: isHomepage.toString()});
      var button = CardService.newTextButton()
          .setText('Change cat')
          .setOnClickAction(action)
          .setTextButtonStyle(CardService.TextButtonStyle.FILLED);
      var buttonSet = CardService.newButtonSet()
          .addButton(button);
    
      // Create a footer to be shown at the bottom.
      var footer = CardService.newFixedFooter()
          .setPrimaryButton(CardService.newTextButton()
              .setText('Powered by cataas.com')
              .setOpenLink(CardService.newOpenLink()
                  .setUrl('https://cataas.com')));
    
      // Assemble the widgets and return the card.
      var section = CardService.newCardSection()
          .addWidget(image)
          .addWidget(buttonSet);
      var card = CardService.newCardBuilder()
          .addSection(section)
          .setFixedFooter(footer);
    
      if (!isHomepage) {
        // Create the header shown when the card is minimized,
        // but only when this card is a contextual card. Peek headers
        // are never used by non-contexual cards like homepages.
        var peekHeader = CardService.newCardHeader()
          .setTitle('Contextual Cat')
          .setImageUrl('https://www.gstatic.com/images/icons/material/system/1x/pets_black_48dp.png')
          .setSubtitle(text);
        card.setPeekCardHeader(peekHeader)
      }
    
      return card.build();
    }
    
    /**
     * Callback for the "Change cat" button.
     * @param {Object} e The event object, documented {@link
     *     https://developers.google.com/gmail/add-ons/concepts/actions#action_event_objects
     *     here}.
     * @return {CardService.ActionResponse} The action response to apply.
     */
    function onChangeCat(e) {
      console.log(e);
      // Get the text that was shown in the current cat image. This was passed as a
      // parameter on the Action set for the button.
      var text = e.parameters.text;
    
      // The isHomepage parameter is passed as a string, so convert to a Boolean.
      var isHomepage = e.parameters.isHomepage === 'true';
    
      // Create a new card with the same text.
      var card = createCatCard(text, isHomepage);
    
      // Create an action response that instructs the add-on to replace
      // the current card with the new one.
      var navigation = CardService.newNavigation()
          .updateCard(card);
      var actionResponse = CardService.newActionResponseBuilder()
          .setNavigation(navigation);
      return actionResponse.build();
    }
    
    /**
     * Truncate a message to fit in the cat image.
     * @param {string} message The message to truncate.
     * @return {string} The truncated message.
     */
    function truncate(message) {
      if (message.length > MAX_MESSAGE_LENGTH) {
        message = message.slice(0, MAX_MESSAGE_LENGTH);
        message = message.slice(0, message.lastIndexOf(' ')) + '...';
      }
      return message;
    }
    
      

    Gmail.gs

      /**
     * Callback for rendering the card for a specific Gmail message.
     * @param {Object} e The event object.
     * @return {CardService.Card} The card to show to the user.
     */
    function onGmailMessage(e) {
      console.log(e);
      // Get the ID of the message the user has open.
      var messageId = e.gmail.messageId;
    
      // Get an access token scoped to the current message and use it for GmailApp
      // calls.
      var accessToken = e.gmail.accessToken;
      GmailApp.setCurrentMessageAccessToken(accessToken);
    
      // Get the subject of the email.
      var message = GmailApp.getMessageById(messageId);
      var subject = message.getThread().getFirstMessageSubject();
    
      // Remove labels and prefixes.
      subject = subject
          .replace(/^([rR][eE]|[fF][wW][dD])\:\s*/, '')
          .replace(/^\[.*?\]\s*/, '');
    
      // If neccessary, truncate the subject to fit in the image.
      subject = truncate(subject);
    
      return createCatCard(subject);
    }
    
    /**
     * Callback for rendering the card for the compose action dialog.
     * @param {Object} e The event object.
     * @return {CardService.Card} The card to show to the user.
     */
    function onGmailCompose(e) {
      console.log(e);
      var header = CardService.newCardHeader()
          .setTitle('Insert cat')
          .setSubtitle('Add a custom cat image to your email message.');
      // Create text input for entering the cat's message.
      var input = CardService.newTextInput()
          .setFieldName('text')
          .setTitle('Caption')
          .setHint('What do you want the cat to say?');
      // Create a button that inserts the cat image when pressed.
      var action = CardService.newAction()
          .setFunctionName('onGmailInsertCat');
      var button = CardService.newTextButton()
          .setText('Insert cat')
          .setOnClickAction(action)
          .setTextButtonStyle(CardService.TextButtonStyle.FILLED);
      var buttonSet = CardService.newButtonSet()
          .addButton(button);
      // Assemble the widgets and return the card.
      var section = CardService.newCardSection()
          .addWidget(input)
          .addWidget(buttonSet);
      var card = CardService.newCardBuilder()
          .setHeader(header)
          .addSection(section);
      return card.build();
    }
    
    /**
     * Callback for inserting a cat into the Gmail draft.
     * @param {Object} e The event object.
     * @return {CardService.UpdateDraftActionResponse} The draft update response.
     */
    function onGmailInsertCat(e) {
      console.log(e);
      // Get the text that was entered by the user.
      var text = e.formInput.text;
      // Use the "Cat as a service" API to get the cat image. Add a "time" URL
      // parameter to act as a cache buster.
      var now = new Date();
      var imageUrl = 'https://cataas.com/cat';
      if (text) {
        // Replace forward slashes in the text, as they break the CataaS API.
        var caption = text.replace(/\//g, ' ');
        imageUrl += Utilities.formatString('/says/%s?time=%s',
            encodeURIComponent(caption), now.getTime());
      }
      var imageHtmlContent = '<img style="display: block; max-height: 300px;" src="'
          + imageUrl + '"/>';
      var response = CardService.newUpdateDraftActionResponseBuilder()
          .setUpdateDraftBodyAction(CardService.newUpdateDraftBodyAction()
              .addUpdateContent(imageHtmlContent,CardService.ContentType.MUTABLE_HTML)
              .setUpdateType(CardService.UpdateDraftBodyType.IN_PLACE_INSERT))
          .build();
      return response;
    }
    
      

    Calendar.gs

      /**
     * Callback for rendering the card for a specific Calendar event.
     * @param {Object} e The event object.
     * @return {CardService.Card} The card to show to the user.
     */
    function onCalendarEventOpen(e) {
      console.log(e);
      var calendar = CalendarApp.getCalendarById(e.calendar.calendarId);
      // The event metadata doesn't include the event's title, so using the
      // calendar.readonly scope and fetching the event by it's ID.
      var event = calendar.getEventById(e.calendar.id);
      if (!event) {
        // This is a new event still being created.
        return createCatCard('A new event! Am I invited?');
      }
      var title = event.getTitle();
      // If necessary, truncate the title to fit in the image.
      title = truncate(title);
      return createCatCard(title);
    }
    
      

    Drive.gs

      /**
     * Callback for rendering the card for specific Drive items.
     * @param {Object} e The event object.
     * @return {CardService.Card} The card to show to the user.
     */
    function onDriveItemsSelected(e) {
      console.log(e);
      var items = e.drive.selectedItems;
      // Include at most 5 items in the text.
      items = items.slice(0, 5);
      var text = items.map(function(item) {
        var title = item.title;
        // If neccessary, truncate the title to fit in the image.
        title = truncate(title);
        return title;
      }).join('\n');
      return createCatCard(text);
    }
    
      

  8. 按一下「專案設定」圖示 專案設定圖示

  9. 檢查「顯示 "appsscript.json"」資訊清單檔案

  10. 按一下「編輯器」圖示

  11. 開啟 appsscript.json 檔案,並將內容替換為下列內容 然後點選「儲存」圖示 「儲存」圖示

    appsscript.json

       {
      "timeZone": "America/New_York",
      "dependencies": {
      },
      "exceptionLogging": "STACKDRIVER",
      "oauthScopes": [
        "https://www.googleapis.com/auth/calendar.addons.execute",
        "https://www.googleapis.com/auth/calendar.readonly",
        "https://www.googleapis.com/auth/drive.addons.metadata.readonly",
        "https://www.googleapis.com/auth/gmail.addons.current.action.compose",
        "https://www.googleapis.com/auth/gmail.addons.current.message.readonly",
        "https://www.googleapis.com/auth/gmail.addons.execute",
        "https://www.googleapis.com/auth/script.locale"],
      "runtimeVersion": "V8",
      "addOns": {
        "common": {
          "name": "Cats",
          "logoUrl": "https://www.gstatic.com/images/icons/material/system/1x/pets_black_48dp.png",
          "useLocaleFromApp": true,
          "homepageTrigger": {
            "runFunction": "onHomepage",
            "enabled": true
          },
          "universalActions": [{
            "label": "Learn more about Cataas",
            "openLink": "https://cataas.com"
          }]
        },
        "gmail": {
          "contextualTriggers": [{
            "unconditional": {
            },
            "onTriggerFunction": "onGmailMessage"
          }],
          "composeTrigger": {
            "selectActions": [{
              "text": "Insert cat",
              "runFunction": "onGmailCompose"
            }],
            "draftAccess": "NONE"
          }
        },
        "drive": {
          "onItemsSelectedTrigger": {
            "runFunction": "onDriveItemsSelected"
          }
        },
        "calendar": {
          "eventOpenTrigger": {
            "runFunction": "onCalendarEventOpen"
          }
        }
      }
    }
    
      

複製 Cloud 專案編號

  1. 在 Google Cloud 控制台中,前往「選單」圖示 &gt; IAM 與管理員 &gt;「設定」

    前往「IAM &」(身分與存取權管理) 頁面管理員設定

  2. 複製「Project number」欄位中的值。

設定 Apps Script 專案的 Cloud 專案

  1. 在您的 Apps Script 專案中, 按一下「Project Settings」圖示 專案設定圖示
  2. 在「Google Cloud Platform (GCP) Project」(Google Cloud Platform (GCP) 專案) 下方,按一下 [變更專案]
  3. 在「GCP 專案編號」中,貼上 Google Cloud 專案編號。
  4. 按一下「設定專案」

安裝測試部署作業

  1. 在 Apps Script 專案中按一下「編輯器」
  2. 依序點選「部署」&gt;「測試部署作業」
  3. 依序點選「安裝」&gt;「完成」

執行指令碼

  1. 前往 Gmail
  2. 如要開啟外掛程式,請在右側面板中,按一下 貓
  3. 如果系統顯示提示,請授權外掛程式。
  4. 這個外掛程式顯示貓咪圖片和文字。如要變更 然後按一下「變更貓咪」
  5. 如果在外掛程式開啟期間開啟電子郵件, 圖片會重新整理,文字則會變更為電子郵件主旨行 (如果過長,將遭到截斷)。

Google 日曆和 Google 日曆 開車、不需要重新授權 外掛程式,以便在這些代管應用程式中使用。

後續步驟