62 lines
1.8 KiB
JavaScript
62 lines
1.8 KiB
JavaScript
/* eslint-disable no-restricted-globals */
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import Sentry from "../logging/Sentry";
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import * as CanApi from "../api/can";
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var window = self;
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function calcCanFrameOffset(firstCanPart, partCanTimes) {
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const firstCanTime = partCanTimes[0];
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const firstPartLastCanTime = partCanTimes[partCanTimes.length - 1];
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return 60 * firstCanPart + (60 - (firstPartLastCanTime - firstCanTime));
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}
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async function fetchCanTimes(base, part) {
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const times = await CanApi.fetchCanTimes(base, part);
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return times.length > 0 ? times : null;
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}
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async function onMessage(e) {
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const { base, partCount } = e.data;
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var canTimes = null;
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// intentional off by one error!
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// we never want to check the very last segment because the code doesn't actually work on last segments
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// we don't have enough info in memory to do this...
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// if can messages start in the final segment of a route, then you don't get any can messages.
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try {
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for (let part = 0; part < partCount; part++) {
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canTimes = await fetchCanTimes(base, part);
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if (canTimes !== null) {
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const canFrameOffset = calcCanFrameOffset(part, canTimes);
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self.postMessage({ canFrameOffset, firstCanTime: canTimes[0] });
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canTimes = null;
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self.close();
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break;
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}
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}
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if (!canTimes || !canTimes.length) {
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// get the last segment but dont do any of the fancy stuff
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// we fakin it
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canTimes = await fetchCanTimes(base, partCount);
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}
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if (canTimes && canTimes.length) {
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// if we didn't find anything, return the first can message and fake the offset
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self.postMessage({
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canFrameOffset: 0,
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firstCanTime: canTimes[0]
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});
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}
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} catch (err) {
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self.postMessage({ error: "Could not fetch numpy can times" });
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}
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self.close();
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}
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self.onmessage = onMessage;
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