@devcycle/nodejs-server-sdk/sse-connection/src/lib/SSEConnection.js

The DevCycle NodeJS Server SDK used for feature management.

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.SSEConnection = void 0;
const eventsource_1 = __importDefault(require("eventsource"));
class SSEConnection {
    constructor(url, logger, callbacks) {
        this.url = url;
        this.logger = logger;
        this.callbacks = callbacks;
        this.openConnection();
    }
    openConnection() {
        if (typeof eventsource_1.default === 'undefined') {
            this.logger.warn('SSEConnection not opened. EventSource is not available.');
            return;
        }
        this.connection = new eventsource_1.default(this.url, { withCredentials: true });
        this.connection.onmessage = (event) => {
            this.callbacks.onMessage(event.data);
        };
        this.connection.onerror = (err) => {
            this.logger.warn(`SSEConnection warning. Connection failed. Error status: ${err.status}, message: ${err.message}`);
            this.callbacks.onConnectionError();
        };
        this.connection.onopen = () => {
            this.logger.debug('SSEConnection opened');
            this.callbacks.onOpen();
        };
    }
    isConnected() {
        var _a, _b;
        return ((_a = this.connection) === null || _a === void 0 ? void 0 : _a.readyState) === ((_b = this.connection) === null || _b === void 0 ? void 0 : _b.OPEN);
    }
    reopen() {
        if (!this.isConnected()) {
            this.close();
            this.openConnection();
        }
    }
    close() {
        var _a;
        (_a = this.connection) === null || _a === void 0 ? void 0 : _a.close();
    }
}
exports.SSEConnection = SSEConnection;
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