81 lines
2.4 KiB
JavaScript
81 lines
2.4 KiB
JavaScript
/* globals getStyles, saveStyle, styleSectionsEqual */
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'use strict';
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// eslint-disable-next-line no-var
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var updater = {
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COUNT: 'count',
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UPDATED: 'updated',
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SKIPPED: 'skipped',
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SKIPPED_SAME_MD5: 'up-to-date: MD5 is unchanged',
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SKIPPED_SAME_CODE: 'up-to-date: code sections are unchanged',
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SKIPPED_ERROR_MD5: 'error: MD5 is invalid',
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SKIPPED_ERROR_JSON: 'error: JSON is invalid',
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DONE: 'done',
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lastUpdateTime: parseInt(localStorage.lastUpdateTime) || Date.now(),
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checkAllStyles(observe = () => {}) {
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updater.resetInterval();
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return new Promise(resolve => {
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getStyles({}, styles => {
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styles = styles.filter(style => style.updateUrl);
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observe(updater.COUNT, styles.length);
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Promise.all(styles.map(style =>
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updater.checkStyle(style)
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.then(saveStyle)
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.then(saved => observe(updater.UPDATED, saved))
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.catch(err => observe(updater.SKIPPED, style, err))
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)).then(() => {
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observe(updater.DONE);
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resolve();
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});
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});
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});
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},
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checkStyle(style) {
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return download(style.md5Url)
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.then(md5 =>
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!md5 || md5.length != 32 ? Promise.reject(updater.SKIPPED_ERROR_MD5) :
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md5 == style.originalMd5 ? Promise.reject(updater.SKIPPED_SAME_MD5) :
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style.updateUrl)
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.then(download)
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.then(text => tryJSONparse(text))
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.then(json =>
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!updater.styleJSONseemsValid(json) ? Promise.reject(updater.SKIPPED_ERROR_JSON) :
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styleSectionsEqual(json, style) ? Promise.reject(updater.SKIPPED_SAME_CODE) :
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// keep the local name as it could've been customized by the user
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Object.assign(json, {
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id: style.id,
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name: null,
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}));
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},
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styleJSONseemsValid(json) {
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return json
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&& json.sections
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&& json.sections.length
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&& typeof json.sections.every == 'function'
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&& typeof json.sections[0].code == 'string';
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},
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schedule() {
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const interval = prefs.get('updateInterval') * 60 * 60 * 1000;
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if (interval) {
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const elapsed = Math.max(0, Date.now() - updater.lastUpdateTime);
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debounce(updater.checkAllStyles, Math.max(10e3, interval - elapsed));
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} else if (debounce.timers) {
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debounce.unregister(updater.checkAllStyles);
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}
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},
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resetInterval() {
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localStorage.lastUpdateTime = updater.lastUpdateTime = Date.now();
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updater.schedule();
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},
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};
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updater.schedule();
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prefs.subscribe(updater.schedule, ['updateInterval']);
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