From d37175f914f33a4f3593b45e820b9a76929a7ba4 Mon Sep 17 00:00:00 2001
From: ElementalAlchemist <ElementAlchemist7@gmail.com>
Date: Wed, 27 Oct 2021 02:04:58 -0500
Subject: [PATCH] Switch date/time handling from JS Date objects to a datetime
 library to fix padding bug with DST changeover

---
 thrimbletrimmer/.prettierignore      |   4 +-
 thrimbletrimmer/edit.html            |   1 +
 thrimbletrimmer/index.html           |   1 +
 thrimbletrimmer/scripts/common.js    |  58 ++++++---
 thrimbletrimmer/scripts/edit.js      | 178 ++++++++++-----------------
 thrimbletrimmer/scripts/luxon.min.js |   1 +
 thrimbletrimmer/scripts/stream.js    |  37 ++----
 7 files changed, 124 insertions(+), 156 deletions(-)
 create mode 100644 thrimbletrimmer/scripts/luxon.min.js

diff --git a/thrimbletrimmer/.prettierignore b/thrimbletrimmer/.prettierignore
index 3588f1c..0a15642 100644
--- a/thrimbletrimmer/.prettierignore
+++ b/thrimbletrimmer/.prettierignore
@@ -1,2 +1,4 @@
-videojs/
+styles/video-js.min.css
+scripts/video.min.js
+scripts/luxon.min.js
 dashboard.html
\ No newline at end of file
diff --git a/thrimbletrimmer/edit.html b/thrimbletrimmer/edit.html
index b244077..2ddda2f 100644
--- a/thrimbletrimmer/edit.html
+++ b/thrimbletrimmer/edit.html
@@ -8,6 +8,7 @@
 		<link rel="stylesheet" href="styles/video-js.min.css" />
 
 		<script src="scripts/video.min.js"></script>
+		<script src="scripts/luxon.min.js"></script>
 		<script src="scripts/common.js"></script>
 		<script src="scripts/edit.js"></script>
 		<script src="scripts/keyboard-shortcuts.js"></script>
diff --git a/thrimbletrimmer/index.html b/thrimbletrimmer/index.html
index c213eeb..354c585 100644
--- a/thrimbletrimmer/index.html
+++ b/thrimbletrimmer/index.html
@@ -8,6 +8,7 @@
 		<link rel="stylesheet" href="styles/video-js.min.css" />
 
 		<script src="scripts/video.min.js"></script>
+		<script src="scripts/luxon.min.js"></script>
 		<script src="scripts/common.js"></script>
 		<script src="scripts/stream.js"></script>
 		<script src="scripts/keyboard-shortcuts.js"></script>
diff --git a/thrimbletrimmer/scripts/common.js b/thrimbletrimmer/scripts/common.js
index c93086b..71f0d30 100644
--- a/thrimbletrimmer/scripts/common.js
+++ b/thrimbletrimmer/scripts/common.js
@@ -1,4 +1,7 @@
-var globalBusStartTime = new Date("1970-01-01T00:00:00Z");
+var DateTime = luxon.DateTime;
+var Interval = luxon.Interval;
+
+var globalBusStartTime = DateTime.fromISO("1970-01-01T00:00:00", { zone: "utc" });
 var globalStreamName = "";
 var globalStartTimeString = "";
 var globalEndTimeString = "";
@@ -87,35 +90,54 @@ function updateVideoPlayer(newPlaylistURL) {
 	player.src({ src: rangedPlaylistURL });
 }
 
-function dateObjFromBusTime(busTime) {
+function parseHumanTimeStringAsDateTimeMathObject(inputTime) {
 	// We need to handle inputs like "-0:10:15" in a way that consistently makes the time negative.
 	// Since we can't assign the negative sign to any particular part, we'll check for the whole thing here.
 	let direction = 1;
-	if (busTime.startsWith("-")) {
-		busTime = busTime.slice(1);
+	if (inputTime.startsWith("-")) {
+		inputTime = inputTime.slice(1);
 		direction = -1;
 	}
 
-	const parts = busTime.split(":", 3);
-	const hours = (parts[0] || 0) * direction;
+	const parts = inputTime.split(":", 3);
+	const hours = parseInt(parts[0]) * direction;
 	const minutes = (parts[1] || 0) * direction;
 	const seconds = (parts[2] || 0) * direction;
-	const time = new Date(globalBusStartTime);
-	time.setHours(time.getHours() + hours);
-	time.setMinutes(time.getMinutes() + minutes);
-	time.setSeconds(time.getSeconds() + seconds);
-	return time;
+	return { hours: hours, minutes: minutes, seconds: seconds };
+}
+
+function dateTimeFromBusTime(busTime) {
+	return globalBusStartTime.plus(parseHumanTimeStringAsDateTimeMathObject(busTime));
+}
+
+function busTimeFromDateTime(dateTime) {
+	const diff = dateTime.diff(globalBusStartTime);
+	return formatIntervalForDisplay(diff);
 }
 
-function dateObjFromWubloaderTime(wubloaderTime) {
-	return new Date(`${wubloaderTime}Z`);
+function formatIntervalForDisplay(interval) {
+	if (interval.milliseconds < 0) {
+		const negativeInterval = interval.negate();
+		return `-${negativeInterval.toFormat("hh:mm:ss.SSS")}`;
+	}
+	return interval.toFormat("hh:mm:ss.SSS");
+}
+
+function dateTimeFromWubloaderTime(wubloaderTime) {
+	return DateTime.fromISO(wubloaderTime, { zone: "utc" });
 }
 
-function wubloaderTimeFromDateObj(date) {
-	if (!date) {
+function wubloaderTimeFromDateTime(dateTime) {
+	if (!dateTime) {
 		return null;
 	}
-	return date.toISOString().substring(0, 23); // Trim "Z" marker and smaller than milliseconds
+	// Not using ISO here because Luxon doesn't give us a quick way to print an ISO8601 string with no offset.
+	return dateTime.toFormat("yyyy-LL-dd'T'HH:mm:ss.SSS");
+}
+
+function busTimeFromWubloaderTime(wubloaderTime) {
+	const dt = dateTimeFromWubloaderTime(wubloaderTime);
+	return busTimeFromDateTime(dt);
 }
 
 function assembleVideoPlaylistURL(basePlaylistURL) {
@@ -134,10 +156,10 @@ function startAndEndTimeQueryStringParts() {
 
 	let queryStringParts = [];
 	if (startTime) {
-		queryStringParts.push(`start=${wubloaderTimeFromDateObj(startTime)}`);
+		queryStringParts.push(`start=${wubloaderTimeFromDateTime(startTime)}`);
 	}
 	if (endTime) {
-		queryStringParts.push(`end=${wubloaderTimeFromDateObj(endTime)}`);
+		queryStringParts.push(`end=${wubloaderTimeFromDateTime(endTime)}`);
 	}
 	return queryStringParts;
 }
diff --git a/thrimbletrimmer/scripts/edit.js b/thrimbletrimmer/scripts/edit.js
index 4942c2e..4cf8085 100644
--- a/thrimbletrimmer/scripts/edit.js
+++ b/thrimbletrimmer/scripts/edit.js
@@ -17,7 +17,7 @@ window.addEventListener("DOMContentLoaded", async (event) => {
 		}
 
 		const newStartField = document.getElementById("stream-time-setting-start");
-		const newStart = dateObjFromBusTime(newStartField.value);
+		const newStart = dateTimeFromBusTime(newStartField.value);
 		if (!newStart) {
 			addError("Failed to parse start time");
 			return;
@@ -26,7 +26,7 @@ window.addEventListener("DOMContentLoaded", async (event) => {
 		const newEndField = document.getElementById("stream-time-setting-end");
 		let newEnd = null;
 		if (newEndField.value !== "") {
-			newEnd = dateObjFromBusTime(newEndField.value);
+			newEnd = dateTimeFromBusTime(newEndField.value);
 			if (!newEnd) {
 				addError("Failed to parse end time");
 				return;
@@ -34,8 +34,14 @@ window.addEventListener("DOMContentLoaded", async (event) => {
 		}
 
 		const oldStart = getStartTime();
-		const startAdjustment = newStart - oldStart;
-		const newDuration = newEnd === null ? Infinity : newEnd - newStart;
+		const startAdjustment = newStart.diff(oldStart, "seconds").seconds;
+		let newDuration = newEnd === null ? Infinity : newEnd.diff(newStart, "seconds").seconds;
+
+		// The video duration isn't precisely the video times, but can be padded by up to the
+		// segment length on either side.
+		// This makes the assumption that all segments have the same length.
+		const segmentLength = getPlaylistData().segments[0].duration;
+		newDuration += segmentLength * 2;
 
 		// Abort for ranges that exceed new times
 		for (const rangeContainer of document.getElementById("range-definitions").children) {
@@ -54,8 +60,8 @@ window.addEventListener("DOMContentLoaded", async (event) => {
 			}
 		}
 
-		globalStartTimeString = wubloaderTimeFromDateObj(newStart);
-		globalEndTimeString = wubloaderTimeFromDateObj(newEnd);
+		globalStartTimeString = wubloaderTimeFromDateTime(newStart);
+		globalEndTimeString = wubloaderTimeFromDateTime(newEnd);
 
 		updateSegmentPlaylist();
 
@@ -98,25 +104,17 @@ window.addEventListener("DOMContentLoaded", async (event) => {
 	document.getElementById("stream-time-setting-start-pad").addEventListener("click", (_event) => {
 		const startTimeField = document.getElementById("stream-time-setting-start");
 		let startTime = startTimeField.value;
-		startTime = dateObjFromBusTime(startTime);
-		if (isNaN(startTime)) {
-			addError("Couldn't parse entered start time for padding");
-			return;
-		}
-		startTime.setMinutes(startTime.getMinutes() - 1);
-		startTimeField.value = busTimeFromDateObj(startTime);
+		startTime = dateTimeFromBusTime(startTime);
+		startTime = startTime.minus({ minutes: 1 });
+		startTimeField.value = busTimeFromDateTime(startTime);
 	});
 
 	document.getElementById("stream-time-setting-end-pad").addEventListener("click", (_event) => {
 		const endTimeField = document.getElementById("stream-time-setting-end");
 		let endTime = endTimeField.value;
-		endTime = dateObjFromBusTime(endTime);
-		if (isNaN(endTime)) {
-			addError("Couldn't parse entered end time for padding");
-			return;
-		}
-		endTime.setMinutes(endTime.getMinutes() + 1);
-		endTimeField.value = busTimeFromDateObj(endTime);
+		endTime = dateTimeFromBusTime(endTime);
+		endTime = endTime.plus({ minutes: 1 });
+		endTimeField.value = busTimeFromDateTime(endTime);
 	});
 
 	const addRangeIcon = document.getElementById("add-range-definition");
@@ -225,23 +223,23 @@ async function loadVideoInfo() {
 
 async function initializeVideoInfo() {
 	globalStreamName = videoInfo.video_channel;
-	globalBusStartTime = new Date(videoInfo.bustime_start);
+	globalBusStartTime = DateTime.fromISO(videoInfo.bustime_start, { zone: "utc" });
 
-	const eventStartTime = dateObjFromWubloaderTime(videoInfo.event_start);
-	const eventEndTime = videoInfo.event_end ? dateObjFromWubloaderTime(videoInfo.event_end) : null;
+	let eventStartTime = dateTimeFromWubloaderTime(videoInfo.event_start);
+	let eventEndTime = videoInfo.event_end ? dateTimeFromWubloaderTime(videoInfo.event_end) : null;
 
 	// To account for various things (stream delay, just slightly off logging, etc.), we pad the start time by one minute
-	eventStartTime.setMinutes(eventStartTime.getMinutes() - 1);
+	eventStartTime = eventStartTime.minus({ minutes: 1 });
 
 	// To account for various things (stream delay, just slightly off logging, etc.), we pad the end time by one minute.
 	// To account for the fact that we don't record seconds, but the event could've ended any time in the recorded minute, we pad by an additional minute.
 	if (eventEndTime) {
-		eventEndTime.setMinutes(eventEndTime.getMinutes() + 2);
+		eventEndTime = eventEndTime.plus({ minutes: 2 });
 	}
 
-	globalStartTimeString = wubloaderTimeFromDateObj(eventStartTime);
+	globalStartTimeString = wubloaderTimeFromDateTime(eventStartTime);
 	if (eventEndTime) {
-		globalEndTimeString = wubloaderTimeFromDateObj(eventEndTime);
+		globalEndTimeString = wubloaderTimeFromDateTime(eventEndTime);
 	} else {
 		document.getElementById("waveform").classList.add("hidden");
 	}
@@ -255,42 +253,42 @@ async function initializeVideoInfo() {
 			let endTime = range[1];
 
 			if (startTime) {
-				startTime = dateObjFromWubloaderTime(startTime);
+				startTime = dateTimeFromWubloaderTime(startTime);
 			} else {
 				startTime = null;
 			}
 
 			if (endTime) {
-				endTime = dateObjFromWubloaderTime(endTime);
+				endTime = dateTimeFromWubloaderTime(endTime);
 			} else {
 				endTime = null;
 			}
 
-			if (!earliestStartTime || (startTime && startTime < earliestStartTime)) {
+			if (!earliestStartTime || (startTime && startTime.diff(earliestStartTime).milliseconds < 0)) {
 				earliestStartTime = startTime;
 			}
-			if (!latestEndTime || (endTime && endTime > latestEndTime)) {
+			if (!latestEndTime || (endTime && endTime.diff(latestEndTime).milliseconds > 0)) {
 				latestEndTime = endTime;
 			}
 		}
 
-		if (earliestStartTime && earliestStartTime < eventStartTime) {
-			earliestStartTime.setMinutes(earliestStartTime.getMinutes() - 1);
-			globalStartTimeString = wubloaderTimeFromDateObj(earliestStartTime);
+		if (earliestStartTime && earliestStartTime.diff(eventStartTime).milliseconds < 0) {
+			earliestStartTime = earliestStartTime.minus({ minutes: 1 });
+			globalStartTimeString = wubloaderTimeFromDateTime(earliestStartTime);
 		}
 
-		if (latestEndTime && latestEndTime > eventEndTime) {
+		if (latestEndTime && latestEndTime.diff(eventEndTime).milliseconds > 0) {
 			// If we're getting the time from a previous draft edit, we have seconds, so one minute is enough
-			latestEndTime.setMinutes(latestEndTime.getMinutes() + 1);
-			globalEndTimeString = wubloaderTimeFromDateObj(latestEndTime);
+			latestEndTime = latestEndTime.plus({ minutes: 1 });
+			globalEndTimeString = wubloaderTimeFromDateTime(latestEndTime);
 		}
 	}
 
 	document.getElementById("stream-time-setting-stream").innerText = globalStreamName;
 	document.getElementById("stream-time-setting-start").value =
-		getBusTimeFromTimeString(globalStartTimeString);
+		busTimeFromWubloaderTime(globalStartTimeString);
 	document.getElementById("stream-time-setting-end").value =
-		getBusTimeFromTimeString(globalEndTimeString);
+		busTimeFromWubloaderTime(globalEndTimeString);
 
 	updateWaveform();
 
@@ -392,13 +390,11 @@ async function initializeVideoInfo() {
 		} else {
 			const rangeStartField =
 				rangeDefinitionsContainer.getElementsByClassName("range-definition-start")[0];
-			rangeStartField.value = videoHumanTimeFromVideoPlayerTime(0);
-			const player = getVideoJS();
-			const videoDuration = player.duration();
-			if (isFinite(videoDuration)) {
+			rangeStartField.value = videoHumanTimeFromWubloaderTime(globalStartTimeString);
+			if (globalEndTimeString) {
 				const rangeEndField =
 					rangeDefinitionsContainer.getElementsByClassName("range-definition-end")[0];
-				rangeEndField.value = videoHumanTimeFromVideoPlayerTime(videoDuration);
+				rangeEndField.value = videoHumanTimeFromWubloaderTime(globalEndTimeString);
 			}
 		}
 		rangeDataUpdated();
@@ -445,56 +441,14 @@ function getStartTime() {
 	if (!globalStartTimeString) {
 		return null;
 	}
-	return dateObjFromWubloaderTime(globalStartTimeString);
+	return dateTimeFromWubloaderTime(globalStartTimeString);
 }
 
 function getEndTime() {
 	if (!globalEndTimeString) {
 		return null;
 	}
-	return dateObjFromWubloaderTime(globalEndTimeString);
-}
-
-function getBusTimeFromTimeString(timeString) {
-	if (timeString === "") {
-		return "";
-	}
-	const time = dateObjFromWubloaderTime(timeString);
-	return busTimeFromDateObj(time);
-}
-
-function busTimeFromDateObj(time) {
-	const busTimeMilliseconds = time - globalBusStartTime;
-	let remainingBusTimeSeconds = busTimeMilliseconds / 1000;
-
-	let sign = "";
-	if (remainingBusTimeSeconds < 0) {
-		sign = "-";
-		remainingBusTimeSeconds = Math.abs(remainingBusTimeSeconds);
-	}
-
-	const hours = Math.floor(remainingBusTimeSeconds / 3600);
-	remainingBusTimeSeconds %= 3600;
-	let minutes = Math.floor(remainingBusTimeSeconds / 60);
-	let seconds = remainingBusTimeSeconds % 60;
-	let milliseconds = Math.round((seconds % 1) * 1000);
-	seconds = Math.trunc(seconds);
-
-	while (minutes.toString().length < 2) {
-		minutes = `0${minutes}`;
-	}
-	while (seconds.toString().length < 2) {
-		seconds = `0${seconds}`;
-	}
-
-	if (milliseconds > 0) {
-		while (milliseconds.toString().length < 3) {
-			milliseconds = `0${milliseconds}`;
-		}
-		return `${sign}${hours}:${minutes}:${seconds}.${milliseconds}`;
-	}
-
-	return `${sign}${hours}:${minutes}:${seconds}`;
+	return dateTimeFromWubloaderTime(globalEndTimeString);
 }
 
 async function submitVideo() {
@@ -632,11 +586,11 @@ function generateDownloadURL(timeRanges, downloadType, allowHoles, quality) {
 	for (const range of timeRanges) {
 		let timeRangeString = "";
 		if (range.hasOwnProperty("start")) {
-			timeRangeString += wubloaderTimeFromDateObj(range.start);
+			timeRangeString += range.start;
 		}
 		timeRangeString += ",";
 		if (range.hasOwnProperty("end")) {
-			timeRangeString += wubloaderTimeFromDateObj(range.end);
+			timeRangeString += range.end;
 		}
 		queryParts.push(`range=${timeRangeString}`);
 	}
@@ -954,14 +908,21 @@ function setCurrentRangeEndToVideoTime() {
 
 function videoPlayerTimeFromWubloaderTime(wubloaderTime) {
 	const videoPlaylist = getPlaylistData();
-	const wubloaderDateObj = dateObjFromWubloaderTime(wubloaderTime);
+	const wubloaderDateTime = dateTimeFromWubloaderTime(wubloaderTime);
 	let highestDiscontinuitySegmentBefore = 0;
 	for (start of videoPlaylist.discontinuityStarts) {
 		const discontinuityStartSegment = videoPlaylist.segments[start];
+		const discontinuityStartDateTime = DateTime.fromJSDate(
+			discontinuityStartSegment.dateTimeObject,
+			{ zone: "utc" }
+		);
+		const highestDiscontinuitySegmentDateTime = DateTime.fromJSDate(
+			videoPlaylist.segments[highestDiscontinuitySegmentBefore].dateTimeObject,
+			{ zone: "utc" }
+		);
 		if (
-			discontinuityStartSegment.dateTimeObject < wubloaderDateObj &&
-			discontinuityStartSegment.dateTimeObject >
-				videoPlaylist.segments[highestDiscontinuitySegmentBefore].dateTimeObject
+			discontinuityStartDateTime.diff(wubloaderDateTime).milliseconds < 0 && // Discontinuity starts before the provided time
+			discontinuityStartDateTime.diff(highestDiscontinuitySegmentDateTime).milliseconds > 0 // Discontinuity starts after the latest found discontinuity
 		) {
 			highestDiscontinuitySegmentBefore = start;
 		}
@@ -971,16 +932,17 @@ function videoPlayerTimeFromWubloaderTime(wubloaderTime) {
 	for (let segment = 0; segment < highestDiscontinuitySegmentBefore; segment++) {
 		highestDiscontinuitySegmentStart += videoPlaylist.segments[segment].duration;
 	}
+	const highestDiscontinuitySegmentDateTime = DateTime.fromJSDate(
+		videoPlaylist.segments[highestDiscontinuitySegmentBefore].dateTimeObject,
+		{ zone: "utc" }
+	);
 	return (
 		highestDiscontinuitySegmentStart +
-		secondsDifference(
-			videoPlaylist.segments[highestDiscontinuitySegmentBefore].dateTimeObject,
-			wubloaderDateObj
-		)
+		wubloaderDateTime.diff(highestDiscontinuitySegmentDateTime, "seconds").seconds
 	);
 }
 
-function wubloaderTimeFromVideoPlayerTime(videoPlayerTime) {
+function dateTimeFromVideoPlayerTime(videoPlayerTime) {
 	const videoPlaylist = getPlaylistData();
 	let segmentStartTime = 0;
 	let segmentDateObj;
@@ -997,11 +959,14 @@ function wubloaderTimeFromVideoPlayerTime(videoPlayerTime) {
 	if (segmentDateObj === undefined) {
 		return null;
 	}
-	let wubloaderDateObj = new Date(segmentDateObj);
+	let wubloaderDateTime = DateTime.fromJSDate(segmentDateObj, { zone: "utc" });
 	const offset = videoPlayerTime - segmentStartTime;
-	const offsetMilliseconds = offset * 1000;
-	wubloaderDateObj.setMilliseconds(wubloaderDateObj.getMilliseconds() + offsetMilliseconds);
-	return wubloaderDateObj;
+	return wubloaderDateTime.plus({ seconds: offset });
+}
+
+function wubloaderTimeFromVideoPlayerTime(videoPlayerTime) {
+	const dt = dateTimeFromVideoPlayerTime(videoPlayerTime);
+	return wubloaderTimeFromDateTime(dt);
 }
 
 function videoHumanTimeFromVideoPlayerTime(videoPlayerTime) {
@@ -1058,10 +1023,3 @@ function getPlaylistData() {
 	// etc.), this and all callers will need to be updated.
 	return player.tech("OK").vhs.playlists.master.playlists[0];
 }
-
-function secondsDifference(date1, date2) {
-	if (date2 > date1) {
-		return (date2 - date1) / 1000;
-	}
-	return (date1 - date2) / 1000;
-}
diff --git a/thrimbletrimmer/scripts/luxon.min.js b/thrimbletrimmer/scripts/luxon.min.js
new file mode 100644
index 0000000..550c963
--- /dev/null
+++ b/thrimbletrimmer/scripts/luxon.min.js
@@ -0,0 +1 @@
+var luxon=function(e){"use strict";function r(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function o(e,t,n){return t&&r(e.prototype,t),n&&r(e,n),e}function u(){return(u=Object.assign||function(e){for(var t=1;t<arguments.length;t++){var n,r=arguments[t];for(n in r)Object.prototype.hasOwnProperty.call(r,n)&&(e[n]=r[n])}return e}).apply(this,arguments)}function i(e,t){e.prototype=Object.create(t.prototype),s(e.prototype.constructor=e,t)}function a(e){return(a=Object.setPrototypeOf?Object.getPrototypeOf:function(e){return e.__proto__||Object.getPrototypeOf(e)})(e)}function s(e,t){return(s=Object.setPrototypeOf||function(e,t){return e.__proto__=t,e})(e,t)}function c(e,t,n){return(c=function(){if("undefined"!=typeof Reflect&&Reflect.construct&&!Reflect.construct.sham){if("function"==typeof Proxy)return 1;try{return Boolean.prototype.valueOf.call(Reflect.construct(Boolean,[],function(){})),1}catch(e){return}}}()?Reflect.construct:function(e,t,n){var r=[null];r.push.apply(r,t);r=new(Function.bind.apply(e,r));return n&&s(r,n.prototype),r}).apply(null,arguments)}function t(e){var n="function"==typeof Map?new Map:void 0;return(t=function(e){if(null===e||-1===Function.toString.call(e).indexOf("[native code]"))return e;if("function"!=typeof e)throw new TypeError("Super expression must either be null or a function");if(void 0!==n){if(n.has(e))return n.get(e);n.set(e,t)}function t(){return c(e,arguments,a(this).constructor)}return t.prototype=Object.create(e.prototype,{constructor:{value:t,enumerable:!1,writable:!0,configurable:!0}}),s(t,e)})(e)}function l(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=new Array(t);n<t;n++)r[n]=e[n];return r}function k(e,t){var n="undefined"!=typeof Symbol&&e[Symbol.iterator]||e["@@iterator"];if(n)return(n=n.call(e)).next.bind(n);if(Array.isArray(e)||(n=function(e,t){if(e){if("string"==typeof e)return l(e,t);var n=Object.prototype.toString.call(e).slice(8,-1);return"Map"===(n="Object"===n&&e.constructor?e.constructor.name:n)||"Set"===n?Array.from(e):"Arguments"===n||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)?l(e,t):void 0}}(e))||t&&e&&"number"==typeof e.length){n&&(e=n);var r=0;return function(){return r>=e.length?{done:!0}:{done:!1,value:e[r++]}}}throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}var n=function(e){function t(){return e.apply(this,arguments)||this}return i(t,e),t}(t(Error)),f=function(t){function e(e){return t.call(this,"Invalid DateTime: "+e.toMessage())||this}return i(e,t),e}(n),d=function(t){function e(e){return t.call(this,"Invalid Interval: "+e.toMessage())||this}return 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w={weeks:{days:7,hours:168,minutes:10080,seconds:604800,milliseconds:6048e5},days:{hours:24,minutes:1440,seconds:86400,milliseconds:864e5},hours:{minutes:60,seconds:3600,milliseconds:36e5},minutes:{seconds:60,milliseconds:6e4},seconds:{milliseconds:1e3}},Pt=u({years:{quarters:4,months:12,weeks:52,days:365,hours:8760,minutes:525600,seconds:31536e3,milliseconds:31536e6},quarters:{months:3,weeks:13,days:91,hours:2184,minutes:131040,seconds:7862400,milliseconds:78624e5},months:{weeks:4,days:30,hours:720,minutes:43200,seconds:2592e3,milliseconds:2592e6}},w),he=365.2425,dt=30.436875,Wt=u({years:{quarters:4,months:12,weeks:he/7,days:he,hours:24*he,minutes:525949.2,seconds:525949.2*60,milliseconds:525949.2*60*1e3},quarters:{months:3,weeks:he/28,days:he/4,hours:24*he/4,minutes:131487.3,seconds:525949.2*60/4,milliseconds:7889237999.999999},months:{weeks:dt/7,days:dt,hours:24*dt,minutes:43829.1,seconds:2629746,milliseconds:2629746e3}},w),Jt=["years","quarters","months","weeks","days","hours","minutes","seconds","milliseconds"],Yt=Jt.slice(0).reverse();function Gt(e,t,n){e={values:(n=void 0===n?!1:n)?t.values:u({},e.values,t.values||{}),loc:e.loc.clone(t.loc),conversionAccuracy:t.conversionAccuracy||e.conversionAccuracy};return new Bt(e)}function $t(e,t,n,r,i){var o=e[i][n],a=t[n]/o,a=!(Math.sign(a)===Math.sign(r[i]))&&0!==r[i]&&Math.abs(a)<=1?(e=a)<0?Math.floor(e):Math.ceil(e):Math.trunc(a);r[i]+=a,t[n]-=a*o}var Bt=function(){function m(e){var t="longterm"===e.conversionAccuracy||!1;this.values=e.values,this.loc=e.loc||ut.create(),this.conversionAccuracy=t?"longterm":"casual",this.invalid=e.invalid||null,this.matrix=t?Wt:Pt,this.isLuxonDuration=!0}m.fromMillis=function(e,t){return m.fromObject({milliseconds:e},t)},m.fromObject=function(e,t){if(void 0===t&&(t={}),null==e||"object"!=typeof e)throw new v("Duration.fromObject: argument expected to be an object, got "+(null===e?"null":typeof e));return new m({values:le(e,m.normalizeUnit),loc:ut.fromObject(t),conversionAccuracy:t.conversionAccuracy})},m.fromISO=function(e,t){var n=lt(e,[kt,St])[0];return n?m.fromObject(n,t):m.invalid("unparsable",'the input "'+e+"\" can't be parsed as ISO 8601")},m.fromISOTime=function(e,t){var n=lt(e,[wt,qt])[0];return n?m.fromObject(n,t):m.invalid("unparsable",'the input "'+e+"\" can't be parsed as ISO 8601")},m.invalid=function(e,t){if(void 0===t&&(t=null),!e)throw new v("need to specify a reason the Duration is invalid");var n=e instanceof Ve?e:new Ve(e,t);if($e.throwOnInvalid)throw new h(n);return new m({invalid:n})},m.normalizeUnit=function(e){var t={year:"years",years:"years",quarter:"quarters",quarters:"quarters",month:"months",months:"months",week:"weeks",weeks:"weeks",day:"days",days:"days",hour:"hours",hours:"hours",minute:"minutes",minutes:"minutes",second:"seconds",seconds:"seconds",millisecond:"milliseconds",milliseconds:"milliseconds"}[e&&e.toLowerCase()];if(!t)throw new y(e);return t},m.isDuration=function(e){return e&&e.isLuxonDuration||!1};var e=m.prototype;return e.toFormat=function(e,t){t=u({},t=void 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this.isValid?An(this).weekYear:NaN}},{key:"weekNumber",get:function(){return this.isValid?An(this).weekNumber:NaN}},{key:"weekday",get:function(){return this.isValid?An(this).weekday:NaN}},{key:"ordinal",get:function(){return this.isValid?Vn(this.c).ordinal:NaN}},{key:"monthShort",get:function(){return this.isValid?en.months("short",{locObj:this.loc})[this.month-1]:null}},{key:"monthLong",get:function(){return this.isValid?en.months("long",{locObj:this.loc})[this.month-1]:null}},{key:"weekdayShort",get:function(){return this.isValid?en.weekdays("short",{locObj:this.loc})[this.weekday-1]:null}},{key:"weekdayLong",get:function(){return this.isValid?en.weekdays("long",{locObj:this.loc})[this.weekday-1]:null}},{key:"offset",get:function(){return this.isValid?+this.o:NaN}},{key:"offsetNameShort",get:function(){return this.isValid?this.zone.offsetName(this.ts,{format:"short",locale:this.locale}):null}},{key:"offsetNameLong",get:function(){return this.isValid?this.zone.offsetName(this.ts,{format:"long",locale:this.locale}):null}},{key:"isOffsetFixed",get:function(){return this.isValid?this.zone.isUniversal:null}},{key:"isInDST",get:function(){return!this.isOffsetFixed&&(this.offset>this.set({month:1}).offset||this.offset>this.set({month:5}).offset)}},{key:"isInLeapYear",get:function(){return te(this.year)}},{key:"daysInMonth",get:function(){return re(this.year,this.month)}},{key:"daysInYear",get:function(){return this.isValid?ne(this.year):NaN}},{key:"weeksInWeekYear",get:function(){return this.isValid?oe(this.weekYear):NaN}}],[{key:"DATE_SHORT",get:function(){return T}},{key:"DATE_MED",get:function(){return b}},{key:"DATE_MED_WITH_WEEKDAY",get:function(){return O}},{key:"DATE_FULL",get:function(){return M}},{key:"DATE_HUGE",get:function(){return N}},{key:"TIME_SIMPLE",get:function(){return D}},{key:"TIME_WITH_SECONDS",get:function(){return E}},{key:"TIME_WITH_SHORT_OFFSET",get:function(){return I}},{key:"TIME_WITH_LONG_OFFSET",get:function(){return V}},{key:"TIME_24_SIMPLE",get:function(){return x}},{key:"TIME_24_WITH_SECONDS",get:function(){return C}},{key:"TIME_24_WITH_SHORT_OFFSET",get:function(){return F}},{key:"TIME_24_WITH_LONG_OFFSET",get:function(){return Z}},{key:"DATETIME_SHORT",get:function(){return L}},{key:"DATETIME_SHORT_WITH_SECONDS",get:function(){return A}},{key:"DATETIME_MED",get:function(){return z}},{key:"DATETIME_MED_WITH_SECONDS",get:function(){return j}},{key:"DATETIME_MED_WITH_WEEKDAY",get:function(){return q}},{key:"DATETIME_FULL",get:function(){return _}},{key:"DATETIME_FULL_WITH_SECONDS",get:function(){return U}},{key:"DATETIME_HUGE",get:function(){return R}},{key:"DATETIME_HUGE_WITH_SECONDS",get:function(){return H}}]),w}();function nr(e){if(tr.isDateTime(e))return e;if(e&&e.valueOf&&W(e.valueOf()))return tr.fromJSDate(e);if(e&&"object"==typeof e)return tr.fromObject(e);throw new v("Unknown datetime argument: "+e+", of type "+typeof e)}return e.DateTime=tr,e.Duration=Bt,e.FixedOffsetZone=_e,e.IANAZone=je,e.Info=en,e.Interval=Xt,e.InvalidZone=Ue,e.Settings=$e,e.SystemZone=Fe,e.VERSION="2.0.2",e.Zone=xe,Object.defineProperty(e,"__esModule",{value:!0}),e}({});
\ No newline at end of file
diff --git a/thrimbletrimmer/scripts/stream.js b/thrimbletrimmer/scripts/stream.js
index 40fdda6..38308e8 100644
--- a/thrimbletrimmer/scripts/stream.js
+++ b/thrimbletrimmer/scripts/stream.js
@@ -29,20 +29,18 @@ async function loadDefaults() {
 	const streamNameField = document.getElementById("stream-time-setting-stream");
 	streamNameField.value = defaultData.video_channel;
 
-	globalBusStartTime = new Date(defaultData.bustime_start);
+	globalBusStartTime = DateTime.fromISO(defaultData.bustime_start, { zone: "utc" });
 }
 
 // Gets the start time of the video from settings. Returns an invalid date object if the user entered bad data.
 function getStartTime() {
 	switch (globalVideoTimeReference) {
 		case 1:
-			return dateObjFromWubloaderTime(globalStartTimeString);
+			return dateTimeFromWubloaderTime(globalStartTimeString);
 		case 2:
-			return dateObjFromBusTime(globalStartTimeString);
+			return dateTimeFromBusTime(globalStartTimeString);
 		case 3:
-			return new Date(
-				new Date().getTime() - 1000 * parseInputTimeAsNumberOfSeconds(globalStartTimeString)
-			);
+			return DateTime.now().minus(parseHumanTimeStringAsDateTimeMathObject(globalStartTimeString));
 	}
 }
 
@@ -53,29 +51,14 @@ function getEndTime() {
 	}
 	switch (globalVideoTimeReference) {
 		case 1:
-			return dateObjFromWubloaderTime(globalEndTimeString);
+			return dateTimeFromWubloaderTime(globalEndTimeString);
 		case 2:
-			return dateObjFromBusTime(globalEndTimeString);
+			return dateTimeFromBusTime(globalEndTimeString);
 		case 3:
-			return new Date(
-				new Date().getTime() - 1000 * parseInputTimeAsNumberOfSeconds(globalEndTimeString)
-			);
+			return DateTime.now().minus(parseHumanTimeStringAsDateTimeMathObject(globalEndTimeString));
 	}
 }
 
-function parseInputTimeAsNumberOfSeconds(inputTime) {
-	// We need to handle inputs like "-0:10:15" in a way that consistently makes the time negative.
-	// Since we can't assign the negative sign to any particular part, we'll check for the whole thing here.
-	let direction = 1;
-	if (inputTime.startsWith("-")) {
-		inputTime = inputTime.slice(1);
-		direction = -1;
-	}
-
-	const parts = inputTime.split(":", 3);
-	return (parseInt(parts[0]) + (parts[1] || 0) / 60 + (parts[2] || 0) / 3600) * 60 * 60 * direction;
-}
-
 function updateTimeSettings() {
 	updateStoredTimeSettings();
 	if (globalLoadedVideoPlayer) {
@@ -89,7 +72,7 @@ function updateTimeSettings() {
 
 	const startTime = getStartTime();
 	const endTime = getEndTime();
-	if (endTime && endTime < startTime) {
+	if (endTime && endTime.diff(startTime) < 0) {
 		addError(
 			"End time is before the start time. This will prevent video loading and cause other problems."
 		);
@@ -97,8 +80,8 @@ function updateTimeSettings() {
 }
 
 function generateDownloadURL(startTime, endTime, downloadType, allowHoles, quality) {
-	const startURLTime = wubloaderTimeFromDateObj(startTime);
-	const endURLTime = wubloaderTimeFromDateObj(endTime);
+	const startURLTime = wubloaderTimeFromDateTime(startTime);
+	const endURLTime = wubloaderTimeFromDateTime(endTime);
 
 	const queryParts = [`type=${downloadType}`, `allow_holes=${allowHoles}`];
 	if (startURLTime) {