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45 lines
979 B
45 lines
979 B
2 years ago
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/**
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* @typedef {Object} WDSMetaObj
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* @property {boolean} enforceWs
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* @property {number} version
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*/
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/**
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* Derives WDS metadata from a compatible socket client.
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* @param {Function} SocketClient A WDS socket client (SockJS/WebSocket).
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* @returns {WDSMetaObj} The parsed WDS metadata object.
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*/
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function getWDSMetadata(SocketClient) {
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let enforceWs = false;
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if (
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typeof SocketClient.name !== 'undefined' &&
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SocketClient.name !== null &&
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SocketClient.name.toLowerCase().includes('websocket')
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) {
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enforceWs = true;
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}
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let version;
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// WDS versions <=3.5.0
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if (!('onMessage' in SocketClient.prototype)) {
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version = 3;
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} else {
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// WDS versions >=3.5.0 <4
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if (
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'getClientPath' in SocketClient ||
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Object.getPrototypeOf(SocketClient).name === 'BaseClient'
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) {
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version = 3;
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} else {
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version = 4;
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}
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}
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return {
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enforceWs: enforceWs,
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version: version,
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};
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}
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module.exports = getWDSMetadata;
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