使用 Google 选择器选择 Google 云端硬盘文件和文件夹

如需允许用户从 Google 云端硬盘中选择文件或文件夹，您可以配置 SelectionInput widget 以使用 Google 选择器。本指南介绍了如何在插件的配置卡片中设置 Google 选择器。

配置 Google 选择器

如需让选择输入 widget 能够从 Google 云端硬盘中选择文件或文件夹，您必须使用 CommonDataSource 和 DriveDataSourceSpec 配置其 PlatformDataSource。

  1. 将 CommonDataSource 设置为 DRIVE。这会将 Google 云端硬盘指定为选择输入的来源。
  2. （可选）如需指定用户可以选择哪些文件类型，请添加 DriveDataSourceSpec。您可以指定以下一种或多种商品类型：
    • DOCUMENTS
    • SPREADSHEETS
    • PRESENTATIONS
    • PDFS
    • FORMS
    • FOLDERS

示例：选择电子表格和 PDF

以下示例构建了一个配置卡片，可让用户从 Google 云端硬盘中选择多个电子表格或 PDF 文件。当此步骤运行时，它会以输出变量的形式返回所选文件的 ID。

JSON

{
  "timeZone": "America/Los_Angeles",
  "exceptionLogging": "STACKDRIVER",
  "runtimeVersion": "V8",
  "addOns": {
    "common": {
      "name": "Drive Picker Demo",
      "logoUrl": "https://www.gstatic.com/images/icons/material/system/1x/pets_black_48dp.png",
      "useLocaleFromApp": true
    },
    "flows": {
      "workflowElements": [
        {
          "id": "file_selection",
          "state": "ACTIVE",
          "name": "File selection",
          "workflowAction": {
            "inputs": [
              {
                "id": "drive_picker_1",
                "description": "Choose a file from Google Drive",
                "dataType": {
                  "basicType": "STRING"
                }
              }
            ],
            "outputs": [
              {
                "id": "fileId",
                "description": "The id of the selected file",
                "cardinality": "SINGLE",
                "dataType": {
                  "basicType": "STRING"
                }
              }
            ],
            "onConfigFunction": "onConfig",
            "onExecuteFunction": "onExecute"
          }
        }
      ]
    }
  }
}

Apps 脚本

/**
 * Returns a configuration card for the step.
 * This card includes a selection input widget configured as a Google Picker
 * that lets users select spreadsheets and PDFs.
 */
function onConfig() {
  // Allows users to select either spreadsheets or PDFs
  const driveSpec = CardService.newDriveDataSourceSpec()
    .addItemType(
      CardService.DriveItemType.SPREADSHEETS
    )
    .addItemType(
      CardService.DriveItemType.PDFS
    );

  const platformSource = CardService.newPlatformDataSource()
    .setCommonDataSource(
      CardService.CommonDataSource.DRIVE
    )
    .setDriveDataSourceSpec(driveSpec);

  const selectionInput =
    CardService.newSelectionInput()
      .setFieldName("drive_picker_1")
      .setPlatformDataSource(platformSource)
      .setTitle("Drive Picker")
      .setType(
        CardService.SelectionInputType.MULTI_SELECT
      );

  var sectionBuilder =
    CardService.newCardSection()
      .addWidget(selectionInput)

  return CardService.newCardBuilder()
    .addSection(sectionBuilder)
    .build();
}

/**
 * Executes when the step runs.
 * This function retrieves the file ID of the item selected in the Google Picker
 * and returns it as an output variable.
 * @param {Object} event The event object passed by the Flows runtime.
 * @return {Object} The output variables object.
 */
function onExecute(event) {
  //Extract the selected file's ID during execution
  console.log("eventObject: " + JSON.stringify(event));
  var fileId = event.workflow.actionInvocation.inputs["drive_picker_1"].stringValues[0];

  const variableData = AddOnsResponseService.newVariableData()
    .addStringValue(fileId);

  let textFormatElement = AddOnsResponseService.newTextFormatElement()
    .setText("A file has been selected!");

  let workflowTextFormat = AddOnsResponseService.newWorkflowTextFormat()
    .addTextFormatElement(textFormatElement);

  let workflowAction = AddOnsResponseService.newReturnOutputVariablesAction()
    .addVariableData("fileId", variableData)
    .setLog(workflowTextFormat);

  let hostAppAction = AddOnsResponseService.newHostAppAction()
    .setWorkflowAction(workflowAction);

  return AddOnsResponseService.newRenderActionBuilder()
    .setHostAppAction(hostAppAction)
    .build();
}