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import httpStatusCodes from './http_status';
/**
* Polling utility for handling realtime updates.
* Service for vue resouce and method need to be provided as props
*
* @example
* new poll({
* resource: resource,
* method: 'name',
* data: {page: 1, scope: 'all'},
* successCallback: () => {},
* errorCallback: () => {},
* }).makeRequest();
*
* this.service = new BoardsService(endpoint);
* new poll({
* resource: this.service,
* method: 'get',
* data: {page: 1, scope: 'all'},
* successCallback: () => {},
* errorCallback: () => {},
* }).makeRequest();
*
*
* 1. Checks for response and headers before start polling
* 2. Interval is provided by `Poll-Interval` header.
* 3. If `Poll-Interval` is -1, we stop polling
* 4. If HTTP response is 200, we poll.
* 5. If HTTP response is different from 200, we stop polling.
*
*/
export default class Poll {
constructor(options = {}) {
this.options = options;
this.options.data = options.data || {};
this.intervalHeader = 'POLL-INTERVAL';
}
checkConditions(response) {
const headers = gl.utils.normalizeHeaders(response.headers);
const pollInterval = headers[this.intervalHeader];
if (pollInterval > 0 && response.status === httpStatusCodes.OK) {
this.options.successCallback(response);
setTimeout(() => {
this.makeRequest();
}, pollInterval);
} else {
this.options.successCallback(response);
}
}
makeRequest() {
const { resource, method, data, errorCallback } = this.options;
return resource[method](data)
.then(response => this.checkConditions(response))
.catch(error => errorCallback(error));
}
}
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