wip: OAuth 2.0 PKCE workflow

src/renderer/src/scripts/guided-mode/share-folder-with-kcore-team.js

@@ -0,0 +1,38 @@
+import google from "googleapis";
+import open from "open";
+import crypto from "crypto";
+
+// Get access to the file system so we can share their folder with the KCore team using the PKCE OAuth 2.0 flow.
+
+// Load client id and redirect url from a local file.
+const credentials = JSON.parse(window.fs.readFileSync("credentials.json"));
+const { client_id, redirect_uris } = credentials.installed;
+const oAuth2Client = new google.auth.OAuth2(client_id, "", redirect_uris[0]);
+
+// Generate a code verifier and code challenge
+const codeVerifier = crypto.randomBytes(32).toString("hex");
+const codeChallenge = crypto.createHash("sha256").update(codeVerifier).digest("base64url");
+
+// Generate a URL for authorization
+const SCOPES = ["https://www.googleapis.com/auth/drive.file"];
+const authUrl = oAuth2Client.generateAuthUrl({
+  access_type: "offline",
+  scope: SCOPES,
+  code_challenge_method: "S256",
+  code_challenge: codeChallenge,
+});
+
+console.log("Authorize this app by visiting this url:", authUrl);
+open(authUrl);
+
+// Handle the OAuth 2.0 callback
+axios.get("/oauth2callback", async (req, res) => {
+  const code = req.query.code;
+  const { tokens } = await oAuth2Client.getToken({
+    code,
+    code_verifier: codeVerifier,
+  });
+  oAuth2Client.setCredentials(tokens);
+  fs.writeFileSync("token.json", JSON.stringify(tokens));
+  res.send("Authentication successful! You can close this tab.");
+});