32 lines
1.2 KiB
JavaScript
32 lines
1.2 KiB
JavaScript
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export default function(source, DefaultEventSource, P = Promise) {
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return function(sources) {
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return function(cb, configuration) {
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const key = configuration.key;
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if (typeof sources[key] !== 'undefined' && configuration.settings.enabled) {
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if (typeof sources[key].configuration === 'undefined') {
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sources[key].configuration = {};
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}
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sources[key].configuration.settings = configuration.settings;
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return source(sources[key]);
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} else {
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const EventSource = configuration.type || DefaultEventSource;
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const eventSource = (sources[key] = new EventSource(cb, configuration));
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return source(eventSource)
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.catch(function(e) {
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// any errors, delete from the cache for next time
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delete sources[key];
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return P.reject(e);
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})
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.then(function(eventSource) {
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// make sure we cancel everything out if there is no cursor
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if (typeof eventSource.configuration.cursor === 'undefined') {
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eventSource.close();
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delete sources[key];
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}
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return eventSource;
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});
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}
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};
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};
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}
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