Chat / IM

JoyMini Flutter App — Cross-Platform Super App Architecture Practice

A social media and e-commerce integrated super app built with Flutter + Riverpod + GoRouter + Dio, covering core features such as IM, LuckyDraw, KYC, e-commerce, and Wallet

NestJS WebSocket IM Customer Service System: From Group Chat Crisis to Virtual Agent Multi-Channel Architecture

IM Chat & Contact/Group Architecture – Message Engine + Session Management + Group Permissions + Friend Relationship Full Chain

In-depth analysis of the client-side IM instant messaging system: from Message Meta-First Engine, SeqId Cursor Pagination, EventEmitter² Event Decoupling, to Group Management (Kick/Mute/Promote-Demote/Transfer/Dismiss), Friend Relationships (Apply/Process/Search State Machine), Group Join Request Approval Workflow, and WebRTC ICE Server Dynamic Credential Generation, covering 900+ lines of ChatService full source code.