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551 lines
19 KiB
JavaScript
551 lines
19 KiB
JavaScript
'use strict';
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'require baseclass';
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'require ui';
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/* Shared between the Test page's recent-history block and the full History
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* page, so the two can never draw the same data differently. */
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/* Labels are translated here, where the extractor can see them; consumers
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* take them display-ready, the way RANGES and PHASES do. */
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const METRICS = [
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[ 'download_mbps', _('Download'), 'Mbps' ],
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[ 'upload_mbps', _('Upload'), 'Mbps' ],
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[ 'ping_ms', _('Ping'), 'ms' ],
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[ 'jitter_ms', _('Jitter'), 'ms' ]
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];
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/* Series that share a unit share an axis; mixing Mbps and ms on one scale
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* would flatten the milliseconds into the floor. */
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const GROUPS = {
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speed: [ 'download_mbps', 'upload_mbps' ],
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latency: [ 'ping_ms', 'jitter_ms' ]
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};
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/* Labels are translated here, where the extractor can see them: switcher()
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* takes them display-ready. The key is the seconds, never the label. */
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const RANGES = [
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[ _('24h'), 86400 ],
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[ _('7d'), 604800 ],
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[ _('30d'), 2592000 ],
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[ _('1y'), 31536000 ],
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[ _('All'), 0 ]
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];
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function esc(s) {
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return String(s == null ? '' : s).replace(/"/g, '""');
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}
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function download(name, mime, text) {
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const blob = new Blob([ text ], { type: mime }),
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url = window.URL.createObjectURL(blob),
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link = E('a', { 'style': 'display:none', 'href': url, 'download': name });
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document.body.appendChild(link);
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link.click();
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document.body.removeChild(link);
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window.URL.revokeObjectURL(url);
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}
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function metricOf(key) {
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return METRICS.find(m => m[0] == key);
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}
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/* A metric keeps one color everywhere: the first of its group wears the
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* theme's primary color, the second the fixed companion shade. */
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function colorIndexOf(key) {
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for (const g in GROUPS) {
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const i = GROUPS[g].indexOf(key);
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if (i >= 0)
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return i;
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}
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return 0;
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}
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/* Math.min.apply passes the whole series as arguments, and a year of
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* quarter-hourly samples is more of them than an engine has to accept in one
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* call -- the chart would throw instead of drawing. */
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function extent(vals) {
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let min = vals[0], max = vals[0];
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for (let i = 1; i < vals.length; i++) {
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if (vals[i] < min) min = vals[i];
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if (vals[i] > max) max = vals[i];
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}
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return [ min, max ];
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}
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/* One scale shared by the renderer and the hover layer: both must agree on
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* where a sample sits, or the tooltip would point beside the line. Spans
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* every requested series, and the day's min/max spread when aggregated. */
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function chartScale(entries, metrics, resolution) {
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const W = 600, H = 240, L = 46, R = 10, T = 14, B = 24;
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if (!entries || entries.length < 1)
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return null;
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const vals = [];
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entries.forEach(e => {
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metrics.forEach(k => {
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if (typeof e[k] == 'number')
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vals.push(e[k]);
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if (resolution == '1d') {
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if (typeof e[k + '_min'] == 'number')
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vals.push(e[k + '_min']);
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if (typeof e[k + '_max'] == 'number')
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vals.push(e[k + '_max']);
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}
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});
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});
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if (!vals.length)
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return null;
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let [ min, max ] = extent(vals);
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/* Vertical padding: 10% of the spread, but never less than 2% of the
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* value itself -- a connection steady within tenths of a Mbps must not
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* be zoomed into dramatic noise. A flat zero line still needs a
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* nonzero span to be drawable. */
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const pad = Math.max((max - min) * 0.1, Math.abs(max) * 0.02) || 1;
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min -= pad; max += pad;
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return {
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W: W, H: H, L: L, R: R, T: T, B: B,
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min: min, max: max,
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xs: i => entries.length > 1
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? L + i * (W - L - R) / (entries.length - 1)
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: (L + W - R) / 2,
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ys: v => T + (H - T - B) * (1 - (v - min) / (max - min))
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};
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}
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/* Timestamps for humans: daily aggregates carry a plain date, everything else
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* becomes the locale's date and time; garbage shows as itself. */
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function chartStampFull(e, resolution) {
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if (!e || !e.timestamp)
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return '?';
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if (resolution == '1d' || e.timestamp.indexOf('T') < 0)
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return e.timestamp;
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const d = new Date(e.timestamp);
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return isNaN(d.getTime()) ? e.timestamp : d.toLocaleString();
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}
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function chartStampShort(e, resolution) {
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if (!e || !e.timestamp)
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return '';
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if (resolution == '1d' || e.timestamp.indexOf('T') < 0)
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return e.timestamp;
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const d = new Date(e.timestamp);
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return isNaN(d.getTime()) ? e.timestamp : d.toLocaleDateString();
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}
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function fmtVal(v, unit) {
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return (typeof v == 'number')
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? (v.toFixed(unit == 'Mbps' ? 2 : 1) + ' ' + unit) : '–';
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}
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return baseclass.extend({
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METRICS: METRICS,
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GROUPS: GROUPS,
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RANGES: RANGES,
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/* Linked plainly, the way the other applications do: uhttpd serves
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* static resources with ETag revalidation, so an upgraded stylesheet
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* reaches the browser without a cache-busting version to maintain. */
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cssLink() {
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return E('link', {
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'rel': 'stylesheet',
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'href': L.resource('librespeed/librespeed.css')
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});
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},
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/* One token->label table for the schedule intervals: Settings builds
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* its choices from it and the Test page looks the status label up, so
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* the two cannot drift. The init script accepts more shapes than these
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* six, so readers must fall back to the raw token. */
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INTERVALS: {
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'15m': _('Every 15 minutes'),
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'30m': _('Every 30 minutes'),
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'1h': _('Hourly'),
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'6h': _('Every 6 hours'),
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'12h': _('Every 12 hours'),
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'1d': _('Daily')
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},
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/* Exported alongside the chart: every timestamp a page prints should
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* come through here, or the date-only guard gets lost in a copy. */
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chartStampFull: chartStampFull,
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/* Plain figures of one series: what is normal, how much it wobbles, and
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* where it stands now. The story sentences are built from these. On
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* daily aggregates the extremes come from the _min/_max columns the
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* chart also draws -- min/max of the daily means would understate the
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* spread and contradict the band directly above the sentence. */
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seriesStats(entries, metric, resolution) {
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const vals = (entries || []).map(e => e[metric]).filter(v => typeof v == 'number');
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if (!vals.length)
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return null;
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const avg = vals.reduce((a, b) => a + b, 0) / vals.length;
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const lows = (resolution == '1d')
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? (entries || []).map(e => typeof e[metric + '_min'] == 'number'
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? e[metric + '_min'] : e[metric]).filter(v => typeof v == 'number')
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: vals;
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const highs = (resolution == '1d')
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? (entries || []).map(e => typeof e[metric + '_max'] == 'number'
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? e[metric + '_max'] : e[metric]).filter(v => typeof v == 'number')
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: vals;
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return {
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count: vals.length,
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avg: avg,
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min: extent(lows)[0],
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max: extent(highs)[1],
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current: vals[vals.length - 1]
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};
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},
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/* A row of toggle buttons; the active one is highlighted. The state is
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* also spoken: colour alone says nothing to a screen reader, so each
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* button carries aria-pressed and the group a name for what it picks. */
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switcher(view, items, current, onpick, label) {
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return E('div', { 'role': 'group', 'aria-label': label || null },
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items.map(it =>
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E('button', {
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'class': it[0] == current ? 'cbi-button cbi-button-action' : 'cbi-button',
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'style': 'margin-right:.3em',
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'aria-pressed': it[0] == current ? 'true' : 'false',
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'click': ui.createHandlerFn(view, function() {
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return onpick.call(view, it[0]);
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})
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/* Callers hand in display-ready labels: a runtime _() here
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* would both miss the extractor and translate twice. */
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}, [ it[1] != null ? it[1] : it[0] ])));
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},
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/* The one chart component: hand-built SVG, the way the realtime status
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* graphs do it, colored by the stylesheet so it wears the active theme.
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*
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* opts.series keys drawn as lines (one unit family per chart)
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* opts.resolution 'raw' or '1d'; aggregates draw their min-max band
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* opts.hover guide line + a full-measurement tooltip
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* opts.legend { all, onToggle }: checkbox legend that switches
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* series on and off -- a control, not a caption
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*
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* The x axis is always time: a time series must never be reordered, or
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* the story it tells dissolves. Sorting belongs to the table.
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* Returns false when there is nothing to draw. */
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renderChart(container, entries, opts) {
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container.innerHTML = '';
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const series = (opts.series || []).filter(k => metricOf(k));
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const sc = chartScale(entries, series, opts.resolution);
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if (!sc) {
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if (opts.legend)
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this.renderLegend(container, entries, opts);
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return false;
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}
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const W = sc.W, H = sc.H, L = sc.L, R = sc.R, T = sc.T, B = sc.B;
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const grid = [ 0.25, 0.5, 0.75 ].map(f => {
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const y = T + (H - T - B) * f,
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v = sc.max - (sc.max - sc.min) * f;
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return '<line x1="%d" y1="%f" x2="%d" y2="%f" stroke="currentColor" stroke-opacity="0.15"/>'
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.format(L, y, W - R, y) +
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'<text x="%d" y="%f" font-size="10" fill="currentColor" fill-opacity="0.6" text-anchor="end">%s</text>'
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.format(L - 4, y + 3, v.toFixed(1));
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}).join('');
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let body = '';
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series.forEach(k => {
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const ci = colorIndexOf(k);
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const valid = entries
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.map((e, i) => (typeof e[k] == 'number') ? [ sc.xs(i), sc.ys(e[k]), e[k] ] : null)
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.filter(p => p != null);
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if (!valid.length)
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return;
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const pts = valid.map(p => '%f,%f'.format(p[0], p[1])).join(' ');
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/* Aggregated entries carry the day's spread beside the mean,
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* drawn as a band under the mean line. */
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if (opts.resolution == '1d') {
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const lo = entries.map((e, i) => (typeof e[k + '_min'] == 'number')
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? '%f,%f'.format(sc.xs(i), sc.ys(e[k + '_min'])) : null).filter(p => p != null);
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const hi = entries.map((e, i) => (typeof e[k + '_max'] == 'number')
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? '%f,%f'.format(sc.xs(i), sc.ys(e[k + '_max'])) : null).filter(p => p != null);
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if (lo.length)
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body += '<polygon class="librespeed-band librespeed-fill-%d" points="%s %s"/>'
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.format(ci, lo.join(' '), hi.reverse().join(' '));
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}
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/* The soft fill reads well under one line; under two it is mud. */
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if (series.length == 1 && valid.length > 1)
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body += '<polygon class="librespeed-area librespeed-fill-%d" points="%s %f,%f %f,%f"/>'
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.format(ci, pts, valid[valid.length - 1][0], H - B, valid[0][0], H - B);
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/* The dashed average is the series' "what is normal" reference. */
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const avg = valid.reduce((a, p) => a + p[2], 0) / valid.length;
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body += '<line class="librespeed-avgline librespeed-stroke-%d" x1="%d" y1="%f" x2="%d" y2="%f"/>'
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.format(ci, L, sc.ys(avg), W - R, sc.ys(avg));
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body += '<text x="%d" y="%f" font-size="9" fill="currentColor" fill-opacity=".55" text-anchor="end">%h %s</text>'
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.format(W - R, sc.ys(avg) - 4, _('avg'),
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avg.toFixed(avg >= 100 ? 0 : 1));
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body += (valid.length > 1)
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? '<polyline class="librespeed-line librespeed-stroke-%d" points="%s"/>'.format(ci, pts)
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: '<circle class="librespeed-dot librespeed-fill-%d" cx="%f" cy="%f" r="3"/>'
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.format(ci, valid[0][0], valid[0][1]);
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/* Dots make a sparse series readable; with hundreds of points
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* they would just thicken the line, so they bow out. */
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if (valid.length > 1 && valid.length <= 60)
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body += valid.map(p =>
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'<circle class="librespeed-dot librespeed-fill-%d" cx="%f" cy="%f" r="2"/>'
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.format(ci, p[0], p[1])).join('');
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});
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/* A date-only timestamp names a local calendar day; new Date() would
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* read it as UTC midnight and shift it in negative offsets. */
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const first = entries[0],
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last = entries[entries.length - 1],
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mid = entries[Math.floor((entries.length - 1) / 2)];
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const s1 = chartStampShort(first, opts.resolution),
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s2 = chartStampShort(mid, opts.resolution),
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s3 = chartStampShort(last, opts.resolution);
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const midLabel = (entries.length > 2 && s2 != s1 && s2 != s3)
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? '<text x="%f" y="%d" font-size="10" fill="currentColor" fill-opacity="0.6" text-anchor="middle">%h</text>'
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.format((L + W - R) / 2, H - 6, s2)
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: '';
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const unit = metricOf(series[0]) ? metricOf(series[0])[2] : '';
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const chart = E('div', {});
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chart.innerHTML =
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'<svg viewBox="0 0 %d %d" style="width:100%%; max-height:280px" xmlns="http://www.w3.org/2000/svg">'
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.format(W, H) +
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grid + body +
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'<text x="%d" y="%d" font-size="10" fill="currentColor" fill-opacity="0.6">%h</text>'
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.format(L, H - 6, s1) +
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midLabel +
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'<text x="%d" y="%d" font-size="10" fill="currentColor" fill-opacity="0.6" text-anchor="end">%h (%s)</text>'
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.format(W - R, H - 6, s3, unit) +
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'</svg>';
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container.appendChild(chart);
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if (opts.hover !== false)
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this.attachChartHover(chart, entries, series, opts.resolution, sc);
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if (opts.legend)
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this.renderLegend(container, entries, opts);
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return true;
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},
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/* The legend doubles as the series switch: each entry is a checkbox with
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* the series' color and its average over the visible range. */
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renderLegend(container, entries, opts) {
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const leg = E('div', { 'class': 'librespeed-legend' });
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opts.legend.all.forEach(k => {
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const m = metricOf(k);
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const st = this.seriesStats(entries, k, opts.resolution);
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const cb = E('input', { 'type': 'checkbox' });
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cb.checked = opts.series.indexOf(k) >= 0;
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cb.addEventListener('change', () => opts.legend.onToggle(k, cb.checked));
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leg.appendChild(E('label', { 'class': 'librespeed-legend-item' }, [
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cb,
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E('span', { 'class': 'librespeed-swatch librespeed-bg-%d'.format(colorIndexOf(k)) }),
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E('span', {}, [ m[1] ]),
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st ? E('span', { 'class': 'librespeed-muted' },
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[ ' ' + fmtVal(st.avg, m[2]) + ' ' + _('avg') ]) : ''
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]));
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});
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container.appendChild(leg);
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},
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/* Hover layer: a guide line, a highlighted sample per series, and an HTML
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* tooltip carrying the whole measurement -- every metric, the server and
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* how the test travelled -- because whoever inspects one point wants to
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* know about that test, not one number of it. Daily aggregates show the
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* day's spread of the drawn series instead. */
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attachChartHover(container, entries, series, resolution, sc) {
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const svg = container.querySelector('svg');
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if (!svg || !sc)
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return;
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container.classList.add('librespeed-chart-holder');
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const NS = 'http://www.w3.org/2000/svg';
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const guide = document.createElementNS(NS, 'line');
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guide.setAttribute('class', 'librespeed-guide');
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guide.setAttribute('y1', sc.T);
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guide.setAttribute('y2', sc.H - sc.B);
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guide.style.display = 'none';
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const dots = series.map(k => {
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const d = document.createElementNS(NS, 'circle');
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d.setAttribute('class', 'librespeed-dot librespeed-fill-%d'.format(colorIndexOf(k)));
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d.setAttribute('r', '3.5');
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d.style.display = 'none';
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return d;
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});
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const hit = document.createElementNS(NS, 'rect');
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hit.setAttribute('x', sc.L);
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hit.setAttribute('y', sc.T);
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hit.setAttribute('width', sc.W - sc.L - sc.R);
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hit.setAttribute('height', sc.H - sc.T - sc.B);
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hit.setAttribute('fill', 'transparent');
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svg.appendChild(guide);
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dots.forEach(d => svg.appendChild(d));
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svg.appendChild(hit);
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const tip = E('div', { 'class': 'librespeed-tooltip' });
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container.appendChild(tip);
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const row = (lab, txt) => E('div', { 'class': 'librespeed-tooltip-row' }, [
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E('span', { 'class': 'librespeed-muted' }, [ lab ]),
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E('span', {}, [ txt ])
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]);
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const hide = () => {
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guide.style.display = 'none';
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dots.forEach(d => (d.style.display = 'none'));
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tip.style.display = 'none';
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};
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hit.addEventListener('mousemove', ev => {
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const rect = svg.getBoundingClientRect();
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const x = (ev.clientX - rect.left) * sc.W / rect.width;
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const step = entries.length > 1
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? (sc.W - sc.L - sc.R) / (entries.length - 1) : 1;
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const i = Math.max(0, Math.min(entries.length - 1,
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Math.round((x - sc.L) / step)));
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const e = entries[i];
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||
|
||
const px = sc.xs(i);
|
||
let anchorY = null;
|
||
|
||
guide.setAttribute('x1', px);
|
||
guide.setAttribute('x2', px);
|
||
guide.style.display = '';
|
||
|
||
series.forEach((k, si) => {
|
||
if (typeof e[k] == 'number') {
|
||
const py = sc.ys(e[k]);
|
||
dots[si].setAttribute('cx', px);
|
||
dots[si].setAttribute('cy', py);
|
||
dots[si].style.display = '';
|
||
anchorY = (anchorY == null) ? py : Math.min(anchorY, py);
|
||
}
|
||
else
|
||
dots[si].style.display = 'none';
|
||
});
|
||
|
||
if (anchorY == null)
|
||
return hide();
|
||
|
||
tip.innerHTML = '';
|
||
tip.appendChild(E('div', { 'style': 'font-weight:600; margin-bottom:.2em' },
|
||
[ chartStampFull(e, resolution) ]));
|
||
|
||
if (resolution == '1d') {
|
||
series.forEach(k => {
|
||
const m = metricOf(k);
|
||
if (typeof e[k] != 'number')
|
||
return;
|
||
let txt = fmtVal(e[k], m[2]);
|
||
if (typeof e[k + '_min'] == 'number' &&
|
||
typeof e[k + '_max'] == 'number')
|
||
txt += ' (%s – %s)'.format(
|
||
e[k + '_min'].toFixed(m[2] == 'Mbps' ? 0 : 1),
|
||
e[k + '_max'].toFixed(m[2] == 'Mbps' ? 0 : 1));
|
||
tip.appendChild(row(m[1], txt));
|
||
});
|
||
}
|
||
else {
|
||
METRICS.forEach(m => {
|
||
if (typeof e[m[0]] == 'number')
|
||
tip.appendChild(row(m[1], fmtVal(e[m[0]], m[2])));
|
||
});
|
||
|
||
if (e.server && e.server.name)
|
||
tip.appendChild(E('div', { 'style': 'margin-top:.2em' },
|
||
[ e.server.name ]));
|
||
|
||
const meta = [];
|
||
if (e.interface)
|
||
meta.push(e.interface);
|
||
if (e.family)
|
||
meta.push(e.family == 'ipv6' ? 'IPv6' : 'IPv4');
|
||
if (e.proto)
|
||
meta.push(e.proto.toUpperCase());
|
||
if (meta.length)
|
||
tip.appendChild(E('div', { 'class': 'librespeed-muted' },
|
||
[ meta.join(' · ') ]));
|
||
}
|
||
|
||
tip.style.display = 'block';
|
||
|
||
const cr = container.getBoundingClientRect();
|
||
const pxs = rect.left - cr.left + px * rect.width / sc.W;
|
||
const pys = rect.top - cr.top + anchorY * rect.height / sc.H;
|
||
let left = pxs - tip.offsetWidth / 2;
|
||
left = Math.max(0, Math.min(cr.width - tip.offsetWidth, left));
|
||
tip.style.left = left + 'px';
|
||
tip.style.top = Math.max(0, pys - tip.offsetHeight - 14) + 'px';
|
||
});
|
||
hit.addEventListener('mouseleave', hide);
|
||
},
|
||
|
||
/* Daily aggregates carry each metric's spread beside the mean; the CSV
|
||
* must not lose it, so aggregated exports gain the _min/_max columns. */
|
||
exportCSV(entries, resolution) {
|
||
const agg = (resolution == '1d');
|
||
const keys = METRICS.map(m => m[0]);
|
||
const n = v => (typeof v == 'number') ? v : '';
|
||
|
||
let head = 'timestamp,resolution,interface,family,proto,server,' + keys.join(',');
|
||
|
||
if (agg)
|
||
head += ',' + keys.map(k => k + '_min,' + k + '_max').join(',');
|
||
|
||
const lines = [ head ];
|
||
|
||
(entries || []).forEach(e => {
|
||
/* Every text field is quoted, so esc()'s quote-doubling is correct
|
||
* everywhere and embedded commas cannot shift columns. */
|
||
let row = '"%s","%s","%s","%s","%s","%s",'.format(
|
||
esc(e.timestamp), agg ? '1d' : 'raw', esc(e.interface),
|
||
esc(e.family), esc(e.proto), esc(e.server && e.server.name)) +
|
||
keys.map(k => n(e[k])).join(',');
|
||
|
||
if (agg)
|
||
row += ',' + keys.map(k => n(e[k + '_min']) + ',' + n(e[k + '_max'])).join(',');
|
||
|
||
lines.push(row);
|
||
});
|
||
|
||
download('librespeed-history.csv', 'text/csv', lines.join('\n') + '\n');
|
||
},
|
||
|
||
exportJSON(entries, resolution) {
|
||
download('librespeed-history.json', 'application/json',
|
||
JSON.stringify({ resolution: resolution || 'raw', entries: entries || [] }, null, '\t') + '\n');
|
||
}
|
||
});
|