Method authenticate

src/main/lib/credential-manager.ts:312–346

* Authenticate source via OAuth * * Handles both MCP OAuth and Gmail OAuth flows. * On success, credentials are automatically saved.

(
    source: LoadedSource,
    callbacks?: OAuthCallbacks
  )

   * On success, credentials are automatically saved.
   */
  async authenticate(
    source: LoadedSource,
    callbacks?: OAuthCallbacks
  ): Promise<AuthResult> {
    const defaultCallbacks: OAuthCallbacks = {
      onStatus: (msg) => debug(`[SourceCredentialManager] ${msg}`),
      onError: (err) => debug(`[SourceCredentialManager] Error: ${err}`),
    };
    const cb = callbacks || defaultCallbacks;

    // Google APIs use Google OAuth
    if (source.config.provider === 'google') {
      return this.authenticateGoogle(source, cb);
    }

    // Slack APIs use Slack OAuth
    if (source.config.provider === 'slack') {
      return this.authenticateSlack(source, cb);
    }

    // Microsoft APIs use Microsoft OAuth
    if (source.config.provider === 'microsoft') {
      return this.authenticateMicrosoft(source, cb);
    }

    // MCP OAuth flow
    if (source.config.type === 'mcp' && source.config.mcp?.authType === 'oauth') {
      return this.authenticateMcp(source, cb);
    }

    return {
      success: false,
      error: `Source ${source.config.slug} does not use OAuth authentication`,
    };
  }

  /**
   * Authenticate MCP source via OAuth