1 files changed, 167 insertions, 0 deletions
diff --git a/src/lib/Media/Anime/airing.ts b/src/lib/Media/Anime/airing.ts
new file mode 100644
index 00000000..6eaa2f39
--- /dev/null
+++ b/src/lib/Media/Anime/airing.ts
@@ -0,0 +1,167 @@
+import { get } from 'svelte/store';
+import type { Media } from '../../AniList/media';
+import settings from '../../../stores/settings';
+import type { MediaPrequel } from '$lib/AniList/prequels';
+import type { SubsPlease } from '$lib/subsPlease';
+import levenshtein from 'fast-levenshtein';
+import { totalEpisodes } from '../anime';
+
+interface Time {
+	title: string;
+	time: string;
+	day: string;
+}
+
+const secondsUntil = (targetTime: string, targetDay: string) => {
+	const now = new Date();
+	const [targetHour, targetMinute] = targetTime.split(':').map(Number);
+	let dayDifference =
+		['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'].indexOf(
+			targetDay
+		) - now.getDay();
+
+	if (dayDifference < 0) dayDifference += 7;
+
+	const targetDate = new Date(now);
+
+	targetDate.setDate(now.getDate() + dayDifference);
+	targetDate.setHours(targetHour, targetMinute, 0, 0);
+
+	const secondsDifference = (Number(targetDate) - Number(now)) / 1000;
+
+	return secondsDifference > 0 ? secondsDifference : secondsDifference + 7 * 24 * 60 * 60;
+};
+
+const normalizeTitle = (title: string) =>
+	(title || '')
+		.toLowerCase()
+		.replace(/season \d+|s\d+/g, '')
+		.trim();
+
+const findClosestMatch = (times: Time[], titles: string[]) => {
+	let closestMatch = null;
+	let smallestDistance = Infinity;
+
+	titles.forEach((animeTitle) => {
+		const normalizedAnimeTitle = normalizeTitle(animeTitle);
+
+		times.forEach((item) => {
+			const normalizedItemTitle = normalizeTitle(item.title);
+			const distance = levenshtein.get(normalizedAnimeTitle, normalizedItemTitle);
+
+			if (distance < smallestDistance) {
+				smallestDistance = distance;
+				closestMatch = item;
+			}
+		});
+	});
+
+	return closestMatch;
+};
+
+export const airingTime = (anime: Media, subsPlease: SubsPlease | null, upcoming = false) => {
+	const airingAt = anime.nextAiringEpisode?.airingAt;
+	let untilAiring;
+	let time = new Date(airingAt ? airingAt * 1000 : 0).toLocaleTimeString([], {
+		hour12: !settings.get().display24HourTime,
+		hour: 'numeric',
+		minute: '2-digit'
+	});
+
+	if (get(settings).displayNativeCountdown || !subsPlease) {
+		untilAiring = airingAt ? Math.round((airingAt - Date.now() / 1000) * 100) / 100 : undefined;
+	} else {
+		const times: Time[] = [];
+
+		for (const [key, value] of Object.entries(subsPlease.schedule)) {
+			const flattenedValue = Array.isArray(value) ? value.flat() : [];
+
+			for (const time of flattenedValue) {
+				times.push({
+					title: time.title,
+					time: time.time,
+					day: key
+				});
+			}
+		}
+
+		const foundTime: Time | null = findClosestMatch(times, [
+			anime.title.romaji,
+			anime.title.english,
+			...anime.synonyms
+		]);
+
+		if (foundTime) {
+			untilAiring = secondsUntil((foundTime as Time).time, (foundTime as Time).day);
+			time = new Date(Date.now() + untilAiring * 1000).toLocaleTimeString([], {
+				hour12: !settings.get().display24HourTime,
+				hour: 'numeric',
+				minute: '2-digit'
+			});
+		} else
+			untilAiring = airingAt ? Math.round((airingAt - Date.now() / 1000) * 100) / 100 : undefined;
+	}
+
+	let timeFrame;
+	let hours = null;
+
+	if (
+		(anime as unknown as MediaPrequel).startDate &&
+		new Date(
+			anime.startDate.year,
+			(anime as unknown as MediaPrequel).startDate.month,
+			(anime as unknown as MediaPrequel).startDate.day
+		) < new Date()
+	)
+		return `<span style="opacity: 50%">on ${new Date(
+			anime.startDate.year,
+			(anime as unknown as MediaPrequel).startDate.month,
+			(anime as unknown as MediaPrequel).startDate.day
+		).toLocaleDateString()}</span>`;
+
+	if (untilAiring !== undefined) {
+		let minutes = untilAiring / 60;
+		let few = true;
+
+		if (minutes > 60) {
+			hours = minutes / 60;
+
+			if (hours >= 24) {
+				// let weeks = Math.floor(Math.floor(hours / 24) / 7);
+
+				few = false;
+
+				// if (weeks >= 1) {
+				// 	weeks = Math.round(weeks);
+
+				// 	timeFrame = `${weeks} week${weeks === 1 ? '' : 's'}`;
+				// } else {
+				const days = Math.round(Math.floor(hours / 24));
+
+				timeFrame = `${days.toFixed(0)} day${days === 1 ? '' : 's'}`;
+				// }
+			} else timeFrame = `${hours.toFixed(1)} hour${hours === 1 ? '' : 's'}`;
+		} else {
+			minutes = Math.round(minutes);
+
+			timeFrame = `${minutes} minute${minutes === 1 ? '' : 's'}`;
+		}
+
+		const opacity = Math.max(50, 100 - (untilAiring / 60 / 60 / 24 / 7) * 50);
+
+		if (upcoming)
+			return `<span title="${
+				hours ? `${hours.toFixed(3)} hours` : ''
+			}" style="opacity: ${opacity}%;">${anime.nextAiringEpisode?.episode}${totalEpisodes(
+				anime
+			)} in ${timeFrame} <span style="opacity: 50%">${few ? `(${time})` : ''}</span></span>`;
+		else
+			return `<span title="${
+				hours ? `${hours.toFixed(3)} hours` : ''
+			}" style="opacity: ${opacity}%;">${anime.nextAiringEpisode?.episode} in ${
+				few ? '<b>' : ''
+			}${timeFrame}${few ? '</b>' : ''} ${few ? `(${time})` : ''}</span>`;
+	}
+
+	return '';
+};