Merge branch 'feature/refresh_token'

.prettierrc

@@ -0,0 +1,7 @@
+{
+  "semi": true,
+  "singleQuote": false,
+  "printWidth": 82,
+  "trailingComma": "none",
+  "arrowParens": "avoid"
+}

README.md

@@ -142,6 +142,13 @@ An array of `email` objects with the following fields:<br>
 
 In addition, verbose messages will be written to console.
 
+### `refresh_access_token(credentials_json, token_path)`
+
+`credentials_json`: Path to credentials JSON file.<br>
+`token_path`: Path to existing OAuth2 token file.<br>
+
+Refresh the access token. A new file will overwrite the existing one in `token_path`.
+
 # Example
 
 ## Using `check_inbox()` to look for a specific message:

gmail-tester.js

@@ -183,18 +183,42 @@ async function check_inbox(
  */
 async function get_messages(credentials_json, token_path, options) {
   try {
-    const emails = await _get_recent_email(
-      credentials_json,
-      token_path,
-      options
-    );
+    const emails = await _get_recent_email(credentials_json, token_path, options);
     return emails;
   } catch (err) {
     console.log("[gmail] Error:", err);
   }
 }
 
+async function refresh_access_token(credentials_json, token_path) {
+  const content = JSON.parse(fs.readFileSync(credentials_json));
+  const oAuth2Client = await gmail.authorize(content, token_path);
+  const refresh_token_result = await oAuth2Client.refreshToken(
+    oAuth2Client.credentials.refresh_token
+  );
+  if (refresh_token_result && refresh_token_result.tokens) {
+    const new_token = JSON.parse(fs.readFileSync(token_path));
+    if (refresh_token_result.tokens.access_token) {
+      new_token.access_token = refresh_token_result.tokens.access_token;
+    }
+    if (refresh_token_result.tokens.refresh_token) {
+      new_token.refresh_token = refresh_token_result.tokens.refresh_token;
+    }
+    if (refresh_token_result.tokens.expiry_date) {
+      new_token.expiry_date = refresh_token_result.tokens.expiry_date;
+    }
+    fs.writeFileSync(token_path, JSON.stringify(new_token));
+  } else {
+    throw new Error(
+      `Refresh access token failed! Respose: ${JSON.stringify(
+        refresh_token_result
+      )}`
+    );
+  }
+}
+
 module.exports = {
   check_inbox,
-  get_messages
+  get_messages,
+  refresh_access_token
 };

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gmail-tester",
-  "version": "1.3.1",
+  "version": "1.3.2",
   "description": "A simple NodeJS gmail client which checks the inbox for specific message existance",
   "main": "gmail-tester.js",
   "scripts": {},
@@ -15,7 +15,7 @@
   "author": "Lev Gelfenbuim",
   "license": "MIT",
   "dependencies": {
-    "googleapis": "^59.0.0"
+    "googleapis": "^66.0.0"
   },
   "homepage": "https://github.com/levz0r/gmail-tester"
 }