2946 feature request integrate file selector with google drive and onedrive (#3253)

# Description of Changes

Please provide a summary of the changes, including:
- Why the change was made
- Any challenges encountered


- Added google drive integration config to premium settings in
setting.yml
- Added google drive button to file picker when enabled 
- Picker appears and allows users to load pdfs and other files into the
tools


Closes #(2946)

---

### Documentation
[Docs Update
PR](https://github.com/Stirling-Tools/Stirling-Tools.github.io/pull/67)

---------

Co-authored-by: Anthony Stirling <[email protected]>

src/main/resources/static/js/fileInput.js

@@ -35,6 +35,7 @@ function setupFileInput(chooser) {
   const pdfPrompt = chooser.getAttribute('data-bs-pdf-prompt');
   const inputContainerId = chooser.getAttribute('data-bs-element-container-id');
   const showUploads = chooser.getAttribute('data-bs-show-uploads') === "true";
+  const name = chooser.getAttribute('data-bs-unique-id')
   const noFileSelectedPrompt = chooser.getAttribute('data-bs-no-file-selected');
 
   let inputContainer = document.getElementById(inputContainerId);
@@ -87,6 +88,21 @@ function setupFileInput(chooser) {
     overlay = false;
   }
 
+  const googleDriveFileListener = function (e) {
+    const googleDriveFiles = e.detail;
+
+    const fileInput = document.getElementById(elementId);
+    if (fileInput?.hasAttribute('multiple')) {
+      pushFileListTo(googleDriveFiles, allFiles);
+    } else if (fileInput) {
+      allFiles = [googleDriveFiles[0]];
+    }
+
+    const dataTransfer = new DataTransfer();
+    allFiles.forEach((file) => dataTransfer.items.add(file));
+    fileInput.files = dataTransfer.files;
+    fileInput.dispatchEvent(new CustomEvent('change', { bubbles: true, detail: { source: 'drag-drop' } }));
+  }
 
   const dropListener = function (e) {
     e.preventDefault();
@@ -137,6 +153,7 @@ function setupFileInput(chooser) {
   document.body.addEventListener('dragenter', dragenterListener);
   document.body.addEventListener('dragleave', dragleaveListener);
   document.body.addEventListener('drop', dropListener);
+  document.body.addEventListener(name + 'GoogleDriveDrivePicked', googleDriveFileListener);
 
   $('#' + elementId).on('change', async function (e) {
     let element = e.target;

src/main/resources/static/js/googleFilePicker.js

@@ -0,0 +1,158 @@
+const SCOPES = "https://www.googleapis.com/auth/drive.readonly";
+const SESSION_STORAGE_ID = "googleDrivePickerAccessToken";
+
+let tokenClient;
+let accessToken = sessionStorage.getItem(SESSION_STORAGE_ID);
+
+let isScriptExecuted = false;
+if (!isScriptExecuted) {
+  isScriptExecuted = true;
+  document.addEventListener("DOMContentLoaded", function () {
+    document.querySelectorAll(".google-drive-button").forEach(setupGoogleDrivePicker);
+  });
+}
+
+function gisLoaded() {
+  tokenClient = google.accounts.oauth2.initTokenClient({
+    client_id: window.stirlingPDF.GoogleDriveClientId,
+    scope: SCOPES,
+    callback: "", // defined later
+  });
+}
+
+// add more as needed. 
+// Google picker is limited on what mimeTypes are supported
+// Wild card are not supported
+const expandableMimeTypes = {
+  "image/*" : ["image/jpeg", "image/png","image/svg+xml" ]
+}
+
+function fileInputToGooglePickerMimeTypes(accept) {
+
+  if(accept == null || accept == "" || accept.includes("*/*")){ 
+
+    // Setting null will accept all supported mimetypes
+    return null; 
+  }
+
+  let mimeTypes = [];
+  accept.split(',').forEach(part => {
+    if(!(part in expandableMimeTypes)){
+      mimeTypes.push(part);
+      return;
+    }
+
+    expandableMimeTypes[part].forEach(mimeType => {
+      mimeTypes.push(mimeType);
+    });
+  });
+
+  const  mimeString =  mimeTypes.join(",").replace(/\s+/g, '');
+  console.log([accept, "became", mimeString]);
+  return mimeString;
+}
+
+/**
+ * Callback after api.js is loaded.
+ */
+function gapiLoaded() {
+  gapi.load("client:picker", initializePicker);
+} 
+
+/**
+ * Callback after the API client is loaded. Loads the
+ * discovery doc to initialize the API.
+ */
+async function initializePicker() {
+  await gapi.client.load("https://www.googleapis.com/discovery/v1/apis/drive/v3/rest");
+}
+
+function setupGoogleDrivePicker(picker) {
+  
+  const name = picker.getAttribute('data-name');
+  const accept = picker.getAttribute('data-accept');
+  const multiple = picker.getAttribute('data-multiple') === "true";
+  const mimeTypes = fileInputToGooglePickerMimeTypes(accept);
+
+  picker.addEventListener("click", onGoogleDriveButtonClick);
+
+  function onGoogleDriveButtonClick(e) {
+    e.stopPropagation();
+
+    tokenClient.callback = (response) => {
+      if (response.error !== undefined) {
+        throw response;
+      }
+      accessToken = response.access_token;
+      sessionStorage.setItem(SESSION_STORAGE_ID, accessToken);
+      createGooglePicker();
+    };
+
+    tokenClient.requestAccessToken({ prompt: accessToken === null ? "consent" : "" });
+  }
+
+  /**
+   *  Sign out the user upon button click.
+   */
+  function signOut() {
+    if (accessToken) {
+      sessionStorage.removeItem(SESSION_STORAGE_ID);
+      google.accounts.oauth2.revoke(accessToken);
+      accessToken = null;
+    }
+  }
+
+  function createGooglePicker() {
+    let builder = new google.picker.PickerBuilder()
+      .setDeveloperKey(window.stirlingPDF.GoogleDriveApiKey)
+      .setAppId(window.stirlingPDF.GoogleDriveAppId)
+      .setOAuthToken(accessToken)
+      .addView(
+        new google.picker.DocsView()
+          .setIncludeFolders(true)
+          .setMimeTypes(mimeTypes)
+      )
+      .addView(
+        new google.picker.DocsView()
+          .setIncludeFolders(true)
+          .setEnableDrives(true)
+          .setMimeTypes(mimeTypes)
+      )
+      .setCallback(pickerCallback);
+
+    if(multiple) {
+      builder.enableFeature(google.picker.Feature.MULTISELECT_ENABLED);
+    }
+    const picker = builder.build();
+
+    picker.setVisible(true);
+  }
+
+  /**
+   * Displays the file details of the user's selection.
+   * @param {object} data - Containers the user selection from the picker
+   */
+  async function pickerCallback(data) {
+    if (data.action === google.picker.Action.PICKED) {
+      const files = await Promise.all(
+        data[google.picker.Response.DOCUMENTS].map(async (pickedFile) => {
+          const fileId = pickedFile[google.picker.Document.ID];
+          console.log(fileId);
+          const res = await gapi.client.drive.files.get({
+            fileId: fileId,
+            alt: "media",
+          });
+
+          let file = new File([new Uint8Array(res.body.length).map((_, i) => res.body.charCodeAt(i))], pickedFile.name, {
+            type: pickedFile.mimeType,
+            lastModified: pickedFile.lastModified,
+            endings: pickedFile.endings,
+          });
+          return file;
+        })
+      );
+
+      document.body.dispatchEvent(new CustomEvent(name+"GoogleDriveDrivePicked", { detail: files }));
+    }
+  }
+}