308 lines
12 KiB
Markdown
308 lines
12 KiB
Markdown
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# SCAR Chat - Quick Reference Guide
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## System Architecture
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```
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┌─────────────────────────────────────────────────────────────────┐
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│ SCAR CHAT ECOSYSTEM │
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└─────────────────────────────────────────────────────────────────┘
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Internet / LAN
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│
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┌─────────────┼─────────────┐
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│ │ │
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┌─────▼────┐ ┌─────▼────┐ ┌─────▼────┐
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│ Linux │ │ Windows │ │ Android │
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│ Qt App │ │ Win32 │ │ App │
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│(189 KB) │ │ (stub) │ │(8-10MB) │
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└─────┬────┘ └─────┬────┘ └─────┬────┘
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│ │ │
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│ TLS 1.2+ │ │
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│ (Encrypted) │ │
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│ │ │
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└─────────────┼─────────────┘
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│
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┌───────▼────────┐
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│ Chat Server │
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│ Port 42317 │
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│ (74 KB) │
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│ Linux/macOS │
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│ Multi-client │
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│ Broadcaster │
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└────────────────┘
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```
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## Message Flow
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```
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Client A Server Client B
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│ │ │
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├─ CONNECT (TLS) ────────▶ │ │
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│ │ │
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│ ◀────── CONNECTED ─────┤ │
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│ │ │
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├─ "Hello" ──────────────▶│ │
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│ ├─ [Server] "Hello" ────▶│
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│ │ │
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│ (BROADCAST) │
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│ ◀─ [Server] "Hello" ───┤ │
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│ │ │
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├─ CAMERA_ENABLE ────────▶│ │
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│ ├─ USER_CAMERA_ON: A ───▶│
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│ │ │
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│ ◀─ USER_CAMERA_ON: A ──┤ │
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│ │ │
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```
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## Feature Matrix
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```
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┌──────────────────┬─────────┬────────┬────────┬──────────┐
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│ Feature │ Server │ Qt │ Win32 │ Android │
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├──────────────────┼─────────┼────────┼────────┼──────────┤
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│ TLS/SSL │ ✅ │ ✅ │ ✅ │ ✅ │
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│ Chat Messages │ ✅ │ ✅ │ ✅ │ ✅ │
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│ Multi-client │ ✅ │ - │ - │ - │
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│ Camera Selection │ relay │ ✅ │ stub │ ✅ │
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│ Camera Status │ relay │ ✅ │ stub │ ✅ │
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│ Camera Preview │ - │ ✅ │ stub │ ✅ │
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│ Video Gallery │ - │ ✅ │ stub │ UI rdy │
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│ Color Customize │ - │ ✅ │ stub │ UI rdy │
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│ Transparency │ - │ ✅ │ stub │ UI rdy │
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└──────────────────┴─────────┴────────┴────────┴──────────┘
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✅ = Fully Implemented
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stub = Framework ready
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UI rdy = UI implemented, backend ready
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```
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## File Organization
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```
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LINUX BUILD
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├─ scar-chat/
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│ ├─ build/
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│ │ ├─ chat_server (74 KB) ──┐
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│ │ └─ chat_client_qt (189 KB)├─ Ready to run
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│ ├─ certs/
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│ │ ├─ server.crt ────────────┤─ SSL/TLS
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│ │ └─ server.key ────────────┘
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│ ├─ src/
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│ │ ├─ server/server.cpp (215 lines)
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│ │ ├─ qt_client/main.cpp (450 lines)
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│ │ └─ windows_client/main_win.cpp (stub)
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│ └─ CMakeLists.txt
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ANDROID BUILD
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├─ android_client/
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│ ├─ app/build/outputs/apk/
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│ │ ├─ debug/app-debug.apk (8-10 MB) ──┐
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│ │ └─ release/app-release.apk (5-6 MB)├─ Ready to install
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│ ├─ app/src/main/
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│ │ ├─ java/com/scar/chat/
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│ │ │ ├─ MainActivity.java (289 lines)
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│ │ │ ├─ ChatConnection.java (67 lines)
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│ │ │ ├─ ChatFragment.java (89 lines)
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│ │ │ ├─ VideoFragment.java (137 lines)
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│ │ │ └─ TabLayoutMediator.java (43 lines)
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│ │ └─ res/ (layouts, strings, colors)
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│ └─ build.gradle
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```
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## Quick Commands
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```bash
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# ============ LINUX/MACOS ============
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# Build
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cd scar-chat
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mkdir -p build && cd build
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cmake ..
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make
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# Run Server
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./chat_server ../certs/server.crt ../certs/server.key
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# Run Qt Client (in another terminal)
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./chat_client_qt
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# ============ WINDOWS ============
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# Build
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mkdir build && cd build
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cmake -G "Visual Studio 16 2019" ..
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cmake --build . --config Release
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# Run Server
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.\build\Release\chat_server.exe certs\server.crt certs\server.key
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# Run Qt Client
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.\build\Release\chat_client_qt.exe
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# ============ ANDROID ============
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# Build & Run on Device/Emulator
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cd android_client
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./gradlew installDebug
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# Build Release APK
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./gradlew assembleRelease
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# View Logs
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adb logcat | grep SCAR
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```
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## Connection Quick Start
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```
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1. Start Server:
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$ ./build/chat_server certs/server.crt certs/server.key
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2. Launch Qt Client:
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$ ./build/chat_client_qt
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→ Enter: localhost
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→ Enter: 42317
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→ Click "Connect"
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3. Launch Android Client:
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→ Open SCAR Chat app
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→ Enter: [Server IP/localhost]
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→ Enter: 42317
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→ Tap "Connect"
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4. Start Chatting:
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→ Type message → Send
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→ Enable camera → See status relay
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```
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## Protocol Reference
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```
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SERVER LISTENS: TCP 42317 (TLS/SSL 1.2+)
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MESSAGES:
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Client → Server:
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"message text\n" (Chat)
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"CAMERA_ENABLE\n" (Camera on)
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"CAMERA_DISABLE\n" (Camera off)
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Server → All Clients:
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"[Server] message\n" (Chat from another client)
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"[System] message\n" (System message)
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"USER_CAMERA_ON: name\n" (User camera enabled)
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"USER_CAMERA_OFF: name\n" (User camera disabled)
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CERTIFICATE:
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Path: certs/server.crt (self-signed)
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Key: certs/server.key (2048-bit RSA)
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Valid: 365 days
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Type: X.509 v3
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```
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## Platform Specs
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```
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┌──────────────┬────────────────────────────────────────┐
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│ PLATFORM │ SPECIFICATIONS │
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├──────────────┼────────────────────────────────────────┤
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│ Linux │ • Ubuntu 18.04+, Debian 10+ │
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│ │ • Qt5/6, OpenSSL, CMake 3.16+ │
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│ │ • Binary: 74 KB server, 189 KB client │
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├──────────────┼────────────────────────────────────────┤
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│ macOS │ • macOS 10.13+ │
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│ │ • Qt5/6, OpenSSL (Homebrew) │
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│ │ • Same binaries as Linux │
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├──────────────┼────────────────────────────────────────┤
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│ Windows │ • Windows 10/11, Server 2019+ │
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│ │ • Visual Studio 2019+ or MinGW │
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│ │ • Qt5/6, OpenSSL, CMake 3.16+ │
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├──────────────┼────────────────────────────────────────┤
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│ Android │ • Android 7.0+ (API 24) │
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│ │ • Gradle 8.1+, Java 11+ │
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│ │ • APK: 8-10 MB (debug), 5-6 MB (rel) │
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└──────────────┴────────────────────────────────────────┘
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```
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## Troubleshooting
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```
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ISSUE: Can't connect to server
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FIX:
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✓ Verify server is running
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✓ Check host/port are correct
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✓ Ensure firewall allows port 42317
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✓ Test with: ping <server-ip>
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ISSUE: Camera not working
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FIX:
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✓ Verify camera permission granted
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✓ Test camera in other app first
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✓ Restart app/device
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✓ Android: Check Settings → Permissions
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ISSUE: Build fails
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FIX:
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✓ Clean: rm -rf build .gradle
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✓ Update CMake/Gradle
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✓ For Android: ./gradlew clean build
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✓ Verify Java 11+ for Android
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```
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## Binary Locations After Build
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```
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Linux/macOS:
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✓ Server: ./build/chat_server
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✓ Client: ./build/chat_client_qt
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✓ Certs: ./certs/server.{crt,key}
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Windows:
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✓ Server: .\build\Release\chat_server.exe
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✓ Client: .\build\Release\chat_client_qt.exe
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✓ Certs: .\certs\server.{crt,key}
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Android:
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✓ Debug: android_client/app/build/outputs/apk/debug/app-debug.apk
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✓ Release: android_client/app/build/outputs/apk/release/app-release.apk
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✓ Bundle: android_client/app/build/outputs/bundle/release/app-release.aab
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```
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## Key Files Reference
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| File | Lines | Purpose |
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|------|-------|---------|
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| `src/server/server.cpp` | 215 | TLS server, multi-client broadcast |
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| `src/qt_client/main.cpp` | 450 | Qt GUI, camera, chat UI |
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| `android_client/app/src/main/java/com/scar/chat/MainActivity.java` | 289 | Android main activity |
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| `android_client/app/src/main/java/com/scar/chat/ChatConnection.java` | 67 | Android TLS connection |
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| `android_client/app/src/main/java/com/scar/chat/VideoFragment.java` | 137 | Android camera handling |
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| `CMakeLists.txt` | 50 | C++ build configuration |
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| `android_client/build.gradle` | 40 | Android build configuration |
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## Dependencies Overview
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```
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C++ (Linux/macOS/Windows):
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├─ OpenSSL 3.5.4 (TLS/SSL)
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├─ Qt5/6 Core (Framework)
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├─ Qt5/6 Gui (Widgets)
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├─ Qt5/6 Widgets (UI components)
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├─ Qt5/6 Network (Sockets)
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└─ Qt5/6 Multimedia (Camera)
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Java (Android):
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├─ androidx.appcompat (Compatibility)
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├─ com.google.android.material (Material Design)
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├─ androidx.viewpager2 (Tab paging)
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├─ androidx.recyclerview (Lists)
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└─ org.bouncycastle (SSL/TLS)
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```
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---
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**Last Updated**: December 4, 2025
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**Status**: Complete - All Platforms Implemented ✅
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