more changes

src/lib/stores.js

@@ -1,7 +1,19 @@
 import { writable } from 'svelte/store';
+import { browser } from '$app/environment';
 
 export const currentStream = writable({});
 export const currentSongIndex = writable(0);
+
+export const favoritedStreams = writable(
+	new Set(JSON.parse((browser && localStorage.getItem('favoritedStreams')) || '[]'))
+);
+
+if (browser) {
+	favoritedStreams.subscribe((val) => {
+		localStorage.setItem('favoritedStreams', JSON.stringify(Array.from(val)));
+	});
+}
+
 export const tagList = [
 	'acoustic',
 	'electronic',
@@ -50,7 +62,6 @@ function locationOf(element, array, start, end) {
 
 export function getSongAtTime(currentTime) {
 	return locationOf(currentTime, timestampList) - 1;
-
 }
 
 // less operations needed when doing regular lookups
@@ -58,19 +69,17 @@ export function updateCurrentSong(currentTime, songIndex) {
 	function updateCurrentSongRecurse(songIndex) {
 		if (currentTime >= timestampList[songIndex + 2]) {
 			return updateCurrentSongRecurse(songIndex + 1);
-		}
-		else if (currentTime < timestampList[songIndex + 1]) {
+		} else if (currentTime < timestampList[songIndex + 1]) {
 			return updateCurrentSongRecurse(songIndex - 1);
 		}
 		return songIndex;
 	}
 
 	currentSongIndex.set(updateCurrentSongRecurse(songIndex));
-
 }
 
 export function updateCurrentStream(stream) {
 	currentStream.set(stream);
-	timestampList = [-Infinity, ...stream.tracks.map(track => track[0]), Infinity];
+	timestampList = [-Infinity, ...stream.tracks.map((track) => track[0]), Infinity];
 	currentSongIndex.set(0);
 }

src/lib/utils.js

@@ -0,0 +1,37 @@
+import Sqids from 'sqids';
+
+let sqids = new Sqids({ minLength: 6 });
+
+export function hashcode(str) {
+	for (var i = 0, h = 9; i < str.length; ) h = Math.imul(h ^ str.charCodeAt(i++), 9 ** 9);
+	return h ^ (h >>> 9);
+}
+
+// for mnemonic display
+export function shorthandCode(str) {
+	return sqids.encode([hashcode(str) & 0xffff]);
+}
+
+// for tag display
+export function hashColor(str) {
+	const hash = hashcode(str);
+	return `hsl(${hash % 360}, ${65 + (hash % 30) + 1}%, ${85 + (hash % 10) + 1}%)`;
+}
+
+export function formatSecondsToHms(s) {
+	s = Number(s);
+	var h = Math.floor(s / 3600);
+	var m = Math.ceil((s % 3600) / 60);
+
+	var hDisplay = h > 0 ? h + (h == 1 ? ' hr' : ' hrs') + (m > 0 ? ', ' : '') : '';
+	var mDisplay = m > 0 ? m + (m == 1 ? ' min' : ' mins') : '';
+	return hDisplay + mDisplay;
+}
+
+export function formatDate(unix_timestamp) {
+	return new Date(unix_timestamp).toISOString().split('T')[0];
+}
+
+export function formatTrackTime(s) {
+	return new Date(s * 1000).toISOString().slice(11, 19);
+}