Google Slides #Page: Refresh Charts

// GraalJS Script (engine type: 2)

//////// START "main()" /////////////////////////////////////////////////////////////////

main();
function main(){ 

//// == Config Retrieving / 工程コンフィグの参照 ==
const strAuthzSetting     = configs.get      ( "AuthzConfU" );   /// REQUIRED
  engine.log( " AutomatedTask Config: Authz Setting: " + strAuthzSetting );
const strInputfileId      = configs.get      ( "StrConfA1" );    /// REQUIRED
  if( strInputfileId    === "" ){
    throw new Error( "\n AutomatedTask ConfigError:" +
                     " Config {A1: FileID} is empty \n" );
  }
let   strPageidOriginal   = configs.get      ( "StrConfB1" );    // NotRequired


//// == Data Retrieving / ワークフローデータの参照 ==
// (Nothing. Retrieved via Expression Language in Config Retrieving)


//// == Calculating / 演算 ==

/// Get LastPage ID
/// Google Slides API
/// https://developers.google.com/slides/reference/rest/v1/presentations/get

if( strPageidOriginal === "" ){
  // request0, prepare
  let request0Uri = "https://slides.googleapis.com/v1/presentations/" + strInputfileId;
  let request0    = httpClient.begin(); // HttpRequestWrapper
      request0    = request0.authSetting( strAuthzSetting ); // with "Authorization: Bearer XX"
      // https://questetra.zendesk.com/hc/en-us/articles/360024574471-R2300#HttpRequestWrapper
  // request0, try
  const response0 = request0.get( request0Uri ); // HttpResponseWrapper
  engine.log( " AutomatedTask ApiRequest0 Start: " + request0Uri );
  const response0Code = response0.getStatusCode() + "";
  const response0Body = response0.getResponseAsString() + "";
  engine.log( " AutomatedTask ApiResponse Status: " + response0Code );
  if( response0Code !== "200"){
    throw new Error( "\n AutomatedTask UnexpectedResponseError: " +
                      response0Code + "\n" + response0Body + "\n" );
  }
  // response0, parse
  const response0Obj = JSON.parse( response0Body );
  strPageidOriginal = response0Obj.slides[ response0Obj.slides.length - 1 ].objectId;
}

/// Get IDs of Charts
/// Google Slides API
/// https://developers.google.com/slides/reference/rest/v1/presentations.pages/get
let request1Uri = "https://slides.googleapis.com/v1/presentations/" +
                  strInputfileId + "/pages/" + strPageidOriginal;
let request1    = httpClient.begin(); // HttpRequestWrapper
    request1    = request1.authSetting( strAuthzSetting ); // with "Authorization: Bearer XX"
    // https://questetra.zendesk.com/hc/en-us/articles/360024574471-R2300#HttpRequestWrapper
// request1, try
const response1     = request1.get( request1Uri ); // HttpResponseWrapper
engine.log( " AutomatedTask ApiRequest1 Start: " + request1Uri );
const response1Code = response1.getStatusCode() + "";
const response1Body = response1.getResponseAsString() + "";
engine.log( " AutomatedTask ApiResponse Status: " + response1Code );
if( response1Code !== "200"){
  throw new Error( "\n AutomatedTask UnexpectedResponseError: " +
                    response1Code + "\n" + response1Body + "\n" );
}
// response1, parse
/* 
engine.log( response1Body ); // debug
{
  "objectId": "SLIDES_API66619114_0",
  "pageElements": [
    {
      "objectId": "SLIDES_API66619114_1",
      "size": { ## },
      "transform": { ## },
      "title": "Revenue",
      "sheetsChart": { ## }
    },
    {
      "objectId": "SLIDES_API66619114_2",
      "size": { ## },
      "transform": { ## },
      "sheetsChart": { ## }
    },
    {
      "objectId": "SLIDES_API66619114_3",
      "size": { ## },
      "transform": { ## },
      "image": { ## }
    },
    {
      "objectId": "SLIDES_API66619114_4",
      "size": { ## },
      "shape": { ## }
    }
  ],
  "slideProperties": { ## },
  "revisionId": "opJuZBJWPCFPRw",
  "pageProperties": { ## }
}
*/
const response1Obj = JSON.parse( response1Body );
let   arrChartids = [];
for( let i = 0; i < response1Obj.pageElements.length; i++ ){
  if( response1Obj.pageElements[i].hasOwnProperty('sheetsChart') ){
    arrChartids.push( response1Obj.pageElements[i].objectId );
    engine.log( " AutomatedTask Founded Chart: ObjectID " + 
                      response1Obj.pageElements[i].objectId );
  }
}
if ( arrChartids.length === 0 ) {
  throw new Error( "\n AutomatedTask UnexpectedError:" + 
                   " Sheets Chart not found \n" );
}

/// Refresh all Charts (via batchUpdate Request)
/// Google Slides API
/// https://developers.google.com/slides/reference/rest/v1/presentations/request#refreshsheetschartrequest
// request2, prepare
let request2Uri = "https://slides.googleapis.com/v1/presentations/" +
                  strInputfileId + ":batchUpdate";
let request2Obj = {};
    request2Obj.requests = [];
    for( let i = 0; i < arrChartids.length; i++ ){
      request2Obj.requests[i] = {};
      request2Obj.requests[i].refreshSheetsChart = {};
      request2Obj.requests[i].refreshSheetsChart.objectId = arrChartids[i];
    }
let request2    = httpClient.begin(); // HttpRequestWrapper
    request2    = request2.authSetting( strAuthzSetting ); // with "Authorization: Bearer XX"
    // https://questetra.zendesk.com/hc/en-us/articles/360024574471-R2300#HttpRequestWrapper
    request2    = request2.body( JSON.stringify( request2Obj ), "application/json" );
// request2, try
const response2     = request2.post( request2Uri ); // HttpResponseWrapper
engine.log( " AutomatedTask ApiRequest2 Start: " + request2Uri );
const response2Code = response2.getStatusCode() + "";
const response2Body = response2.getResponseAsString() + "";
engine.log( " AutomatedTask ApiResponse Status: " + response2Code );
if( response2Code !== "200"){
  throw new Error( "\n AutomatedTask UnexpectedResponseError: " +
                    response2Code + "\n" + response2Body + "\n" );
}
// response2, parse
/* 
{
  "presentationId": "1MsdTWR_pN4FQTCCqUhC1F_JWWsagogISvPF9WqOmaq8",
  "replies": [
    {}
  ],
  "writeControl": {
    "requiredRevisionId": "bvHyj2SJ0wwg4A"
  }
}
*/
// (nothing)


//// == Data Updating / ワークフローデータへの代入 ==
// (nothing)


} //////// END "main()" /////////////////////////////////////////////////////////////////


/*
Notes:
- All updates are executed for the Google Sheets charts in the specified page. GoogleSlidesRefresh
    - If no page is specified, all updates will be executed for the last page.
    - No errors or warnings are recorded even if each chart is already up to date.
- For example, if you want to automate the notification of "Monthly Sales Report", define as follows:
    - The template page is automatically duplicated (Google Slides: Page, Duplicate)
    - The report text part is automatically replaced (Google Slides: Page, Replace Strings)
    - The embedded graph is automatically updated (Google Slides: Page, Refresh Charts)
    - The slide page is automatically converted to a PNG image (Google Slides: Page, Generate PNG)
    - The email with the PNG image attached will be sent automatically. (ThrowEmail Event)
- Add reference permission for Google Spreadsheet to the Scope of HTTP Authen Setting. (See Appendix)
    - Only "presentations" will result in a "PERMISSION_DENIED" error.
    - Include one of the spreadsheets.readonly, spreadsheets, drive.readonly, drive, or drive.file scopes.
    - API communication: presentations.batchUpdate > refreshSheetsChart request
    - https://developers.google.com/slides/reference/rest/v1/presentations/batchUpdate#authorization-scopes

Notes-ja:
- 指定ページ内のGoogleSheetsグラフに対して、全更新の処理が実行されます。 GoogleSlidesRefresh
    - もしページ指定がない場合は、最終ページに対して全更新の処理が実行されます。
    - 既に各グラフが最新版の状態になっている場合も、エラーやワーニングは記録されません。
- たとえば「月次売上レポート」の通知業務を自動化したい場合は、以下のような業務プロセスを定義します。
    - 雛形ページが自動複製され、（※Google スライド: ページ, 複製）
    - 貼り付けられている埋め込みグラフが自動更新され、（※Google スライド: ページ, 文字列全置換）
    - 報告テキスト部が当月文に自動置換され、（※Google スライド: ページ, 全グラフ更新）
    - 当該スライドページがPNG画像に自動変換され、（※Google スライド: ページ, PNG画像生成）
    - PNG画像が添付されたメールが自動的に送信される。（※ ThrowEmail イベント）
- HTTP認証設定の認可スコープに「Googleスプレッドシートの参照権限」を追加しておく必要があります。(Appendix参照)
    - "presentations" だけでは "PERMISSION_DENIED" エラーになります。
    - 次のいずれかを加えます。 spreadsheets.readonly, spreadsheets, drive.readonly, drive, drive.file
    - API通信の内容： presentations.batchUpdate > refreshSheetsChart リクエスト
    - https://developers.google.com/slides/reference/rest/v1/presentations/batchUpdate#authorization-scopes

APPENDIX-en
- FILE-ID/PresentationID in Drive (Chars following "/d/")
    - docs.google.com/presentation/d/1p33hGJFUNYixBmMeaV81nsOVYGUUrZIFyErinFp3CI8
- Object-ID of Slide Page (Chars following "id.")
    - docs.google.com/presentation/d/1p33hGJFUNYixBmMeaV81nsOVYGUUrZIFyErinFp3CI8/edit#slide=id.g613777c84a_0_0
- Setting example of "HTTP Authentication" (OAuth2)
    - Authorization Endpoint URL:
        - https://accounts.google.com/o/oauth2/auth?access_type=offline&approval_prompt=force
    - Token Endpoint URL:
        - https://accounts.google.com/o/oauth2/token
    - Scope:
        - https://www.googleapis.com/auth/presentations https://www.googleapis.com/auth/spreadsheets.readonly
    - Client ID, Consumer Secret:
        - ( from https://console.developers.google.com/ )
        - Redirect URLs: https://s.questetra.net/oauth2callback
APPENDIX-ja
- FILE-ID/PresentationID in Drive ("/d/" 以降の文字列)
    - docs.google.com/presentation/d/1p33hGJFUNYixBmMeaV81nsOVYGUUrZIFyErinFp3CI8
- Object-ID of Slide Page ("id." 以降の文字列)
    - docs.google.com/presentation/d/1p33hGJFUNYixBmMeaV81nsOVYGUUrZIFyErinFp3CI8/edit#slide=id.g613777c84a_0_0
- "HTTP認証"（OAuth2）の設定例
    - Authorization Endpoint URL:
        - https://accounts.google.com/o/oauth2/auth?access_type=offline&approval_prompt=force
    - Token Endpoint URL:
        - https://accounts.google.com/o/oauth2/token
    - Scope:
        - https://www.googleapis.com/auth/presentations https://www.googleapis.com/auth/spreadsheets.readonly
    - Client ID, Consumer Secret:
        - ( from https://console.developers.google.com/ )
        - Redirect URLs: https://s.questetra.net/oauth2callback
*/