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SYNC_STATUS.md

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FCS WebSocket Library Sync Status

Last Synced: 2025-12-24 JS Version: fcs-client-lib.js PY Version: fcs_client_lib.py Status: IN_SYNC

Feature Comparison

Feature JS Python Notes
Core Connection
connect() ✅ ✅
disconnect() ✅ ✅
send() ✅ ✅ _send() in Python
Subscription
join(symbol, timeframe) ✅ ✅
leave(symbol, timeframe) ✅ ✅
removeAll() ✅ ✅ remove_all() in Python
rejoinAll() ✅ ✅ _rejoin_all() in Python
activeSubscriptions ✅ ✅ active_subscriptions in Python
Event Callbacks
onconnected ✅ ✅
onmessage ✅ ✅
onclose ✅ ✅
onerror ✅ ✅
onreconnect ✅ ✅
Reconnection
reconnectDelay ✅ ✅ reconnect_delay in Python
reconnectLimit ✅ ✅ reconnect_limit in Python
countReconnects ✅ ✅ count_reconnects in Python
isReconnect ✅ ✅ is_reconnect in Python
Auto-reconnect logic ✅ ✅
Heartbeat
startHeartbeat() ✅ ✅ _start_heartbeat() in Python
stopHeartbeat() ✅ ✅ _stop_heartbeat flag in Python
25s interval ✅ ✅
Logging
showLogs ✅ ✅ Controls console output
Message Handling
ping/pong ✅ ✅
welcome message ✅ ✅
joined_room confirmation ✅ ✅
Browser-Only (Not in Python)
focusTimeout ✅ ❌ Browser tab visibility - N/A for Python
initVisibilityHandling() ✅ ❌ Browser only
handleTabHidden() ✅ ❌ Browser only
handleTabVisible() ✅ ❌ Browser only
clearVisibilityTimeout() ✅ ❌ Browser only
Python-Only Extras
run_forever(blocking) ❌ ✅ Python threading support
Decorator callbacks ❌ ✅ @client.on_message pattern
create_client() helper ❌ ✅ Factory function

Properties Mapping

JavaScript Python
this.url self.url
this.apiKey self.api_key
this.socket self.socket
this.activeSubscriptions self.active_subscriptions
this.heartbeat self._heartbeat_thread
this.reconnectDelay self.reconnect_delay
this.manualClose self.manual_close
this.isConnected self.is_connected
this.showLogs self.show_logs
this.countreconnects self.count_reconnects
this.reconnectlimit self.reconnect_limit
this.isreconnect self.is_reconnect

Sync Instructions

When updating JS file, update Python file with these rules:

  1. New property added in JS → Add to Python __init__ with snake_case
  2. New method added in JS → Add to Python class with snake_case
  3. Property removed in JS → Remove from Python
  4. Method removed in JS → Remove from Python
  5. Logic changed in JS → Update corresponding Python logic

Ignore these JS features (browser-only):

  • Tab visibility handling (focusTimeout, initVisibilityHandling, etc.)
  • WebSocketImpl browser detection (Python always uses websocket-client)

Change Log

2025-12-24 - Initial Sync

  • Added show_logs property to Python __init__
  • Updated all print statements to respect show_logs flag
  • All core features synced
  • Browser-only features excluded (not applicable to Python backend)