feat: Add customizable log level for 'username already exists' error

spec/ParseUser.spec.js

@@ -4430,3 +4430,72 @@ describe('allowClientClassCreation option', () => {
     defaultConfiguration.allowClientClassCreation = true;
   });
 });
+
+describe('custom log levels for username already exists error', () => {
+  const logger = require('../lib/logger').logger;
+  let warnSpy, errorSpy, infoSpy;
+
+  beforeEach(() => {
+    warnSpy = spyOn(logger, 'warn').and.callThrough();
+    errorSpy = spyOn(logger, 'error').and.callThrough();
+    infoSpy = spyOn(logger, 'info').and.callThrough();
+  });
+
+  afterEach(() => {
+    warnSpy.calls.reset();
+    errorSpy.calls.reset();
+    infoSpy.calls.reset();
+  });
+
+  it('should respect warn log level for username already exists error', async () => {
+    await reconfigureServer({
+      logLevels: {
+        usernameAlreadyExists: 'warn',
+      },
+    });
+
+    const user = new Parse.User();
+    user.setUsername('existingUser');
+    user.setPassword('password');
+    await user.signUp();
+
+    const duplicateUser = new Parse.User();
+    duplicateUser.setUsername('existingUser');
+    duplicateUser.setPassword('password');
+
+    try {
+      await duplicateUser.signUp();
+    } catch (error) {
+      expect(error.code).toBe(Parse.Error.USERNAME_TAKEN);
+      expect(warnSpy).toHaveBeenCalled();
+      expect(errorSpy).not.toHaveBeenCalled();
+      expect(infoSpy).not.toHaveBeenCalled();
+    }
+  });
+
+  it('should respect info log level for username already exists error', async () => {
+    await reconfigureServer({
+      logLevels: {
+        usernameAlreadyExists: 'info',
+      },
+    });
+
+    const user = new Parse.User();
+    user.setUsername('anotherExistingUser');
+    user.setPassword('password');
+    await user.signUp();
+
+    const duplicateUser = new Parse.User();
+    duplicateUser.setUsername('anotherExistingUser');
+    duplicateUser.setPassword('password');
+
+    try {
+      await duplicateUser.signUp();
+    } catch (error) {
+      expect(error.code).toBe(Parse.Error.USERNAME_TAKEN);
+      expect(infoSpy).toHaveBeenCalled();
+      expect(warnSpy).not.toHaveBeenCalled();
+      expect(errorSpy).not.toHaveBeenCalled();
+    }
+  });
+});

src/Options/Definitions.js

@@ -1117,4 +1117,10 @@ module.exports.LogLevels = {
       'Log level used by the Cloud Code Triggers `beforeSave`, `beforeDelete`, `beforeFind`, `beforeLogin` on success. Default is `info`.',
     default: 'info',
   },
+  usernameAlreadyExists: {
+    env: 'PARSE_SERVER_LOG_LEVELS_USERNAME_ALREADY_EXISTS',
+    help:
+      'Log level for the username already exists error when trying to sign up.Default is `error`.',
+    default: 'error',
+  },
 };

src/Options/index.js

@@ -635,4 +635,8 @@ export interface LogLevels {
   :DEFAULT: error
   */
   cloudFunctionError: ?string;
+  /* Log level for the username already exists error when trying to sign up.Default is `error`.
+  :DEFAULT: error
+  */
+  usernameAlreadyExists: ?string;
 }

src/RestWrite.js

@@ -1557,10 +1557,14 @@ RestWrite.prototype.runDatabaseOperation = function () {
 
         // Quick check, if we were able to infer the duplicated field name
         if (error && error.userInfo && error.userInfo.duplicated_field === 'username') {
-          throw new Parse.Error(
+          const usernameError = new Parse.Error(
             Parse.Error.USERNAME_TAKEN,
             'Account already exists for this username.'
           );
+
+          return this.config.loggerController[this.config.logLevels.usernameAlreadyExists](
+            JSON.stringify(usernameError)
+          );
         }
 
         if (error && error.userInfo && error.userInfo.duplicated_field === 'email') {