supabase
feat: add WeChat OAuth provider support
What kind of change does this PR introduce? Feature - New WeChat OAuth provider support
What is the current behavior? The authentication service currently supports various external OAuth providers, but WeChat OAuth integration was missing. WeChat is a popular social platform in China that uses a different OAuth flow compared to standard providers like Google or GitHub.
What is the new behavior? This PR adds comprehensive WeChat OAuth provider support with the following features:
WeChat OAuth Authorization Flow: Implements the complete WeChat OAuth 2.0 flow including authorization and token exchange User Identity Handling: Since WeChat doesn't provide email addresses, the system generates synthetic emails using the format {openid}@wechat.local UnionID Support: Handles WeChat's unique UnionID feature for cross-app user identification Comprehensive Test Coverage: Includes extensive test cases covering: Standard signup flow Disabled signup scenarios (with and without existing users) Invite token validation User ban handling Token error scenarios WeChat-specific metadata handling (openid, unionid, avatar, etc.) Key Implementation Details:
Uses openid as the primary identifier since WeChat doesn't provide emails Stores WeChat-specific metadata including unionid, openid, nickname, and avatar Properly handles WeChat's API endpoints (/sns/oauth2/access_token and /sns/userinfo) Implements proper error handling for WeChat API responses Additional context This implementation follows WeChat's official OAuth 2.0 documentation and handles the unique aspects of WeChat's authentication system, such as:
Using appid instead of client_id Supporting both openid (app-specific) and unionid (cross-app) identifiers Handling WeChat's specific scope snsapi_login Managing WeChat's user profile data structure The test suite ensures robust coverage of all edge cases and error scenarios specific to WeChat OAuth integration.
ref https://developers.weixin.qq.com/doc/oplatform/en/Website_App/WeChat_Login/Wechat_Login.html
