betfair-node/dist/heartbeat.js

A comprehensive Node.js TypeScript library for the Betfair Exchange API, providing both JSON-RPC API integration and real-time Exchange Stream API support for automated betting and trading applications.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getHeartbeatInterval = exports.isHeartbeatActive = exports.updateHeartbeatInterval = exports.refreshHeartbeat = exports.stopHeartbeat = exports.startHeartbeat = exports.createHeartbeatState = void 0;
/**
 * Creates a new heartbeat state
 * @param heartbeatMs - Heartbeat interval in milliseconds
 * @param onHeartAttack - Callback function when heartbeat fails
 * @returns Initial heartbeat state
 */
const createHeartbeatState = (heartbeatMs, onHeartAttack) => ({
    isBeating: false,
    heartbeatMs,
    onHeartAttack,
});
exports.createHeartbeatState = createHeartbeatState;
/**
 * Starts the heartbeat monitoring
 * @param state - Current heartbeat state
 * @returns Updated heartbeat state
 */
const startHeartbeat = (state) => {
    if (state.isBeating) {
        return state; // Already beating
    }
    // Starting heartbeat
    // Add extra 2 seconds to reduce chance of accidental heart attack
    const timeout = setTimeout(state.onHeartAttack, state.heartbeatMs + 2000);
    return {
        ...state,
        isBeating: true,
        timeout,
    };
};
exports.startHeartbeat = startHeartbeat;
/**
 * Stops the heartbeat monitoring
 * @param state - Current heartbeat state
 * @returns Updated heartbeat state
 */
const stopHeartbeat = (state) => {
    if (!state.isBeating) {
        return state; // Already stopped
    }
    // Stopping heartbeat
    if (state.timeout) {
        clearTimeout(state.timeout);
    }
    return {
        ...state,
        isBeating: false,
        timeout: undefined,
    };
};
exports.stopHeartbeat = stopHeartbeat;
/**
 * Refreshes the heartbeat timer by stopping and restarting it
 * @param state - Current heartbeat state
 * @returns Updated heartbeat state
 */
const refreshHeartbeat = (state) => {
    if (!state.isBeating) {
        return state; // Don't warn - just return if not beating
    }
    // Stop and restart for a more reliable refresh
    const stoppedState = (0, exports.stopHeartbeat)(state);
    return (0, exports.startHeartbeat)(stoppedState);
};
exports.refreshHeartbeat = refreshHeartbeat;
/**
 * Updates the heartbeat interval
 * @param state - Current heartbeat state
 * @param newHeartbeatMs - New heartbeat interval in milliseconds
 * @returns Updated heartbeat state
 */
const updateHeartbeatInterval = (state, newHeartbeatMs) => {
    const updatedState = { ...state, heartbeatMs: newHeartbeatMs };
    if (state.isBeating) {
        // Restart with new interval
        const stoppedState = (0, exports.stopHeartbeat)(updatedState);
        return (0, exports.startHeartbeat)(stoppedState);
    }
    return updatedState;
};
exports.updateHeartbeatInterval = updateHeartbeatInterval;
/**
 * Checks if the heartbeat is currently active
 * @param state - Current heartbeat state
 * @returns True if heartbeat is active
 */
const isHeartbeatActive = (state) => {
    return state.isBeating;
};
exports.isHeartbeatActive = isHeartbeatActive;
/**
 * Gets the current heartbeat interval
 * @param state - Current heartbeat state
 * @returns Heartbeat interval in milliseconds
 */
const getHeartbeatInterval = (state) => {
    return state.heartbeatMs;
};
exports.getHeartbeatInterval = getHeartbeatInterval;
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