133 lines
3.6 KiB
TypeScript
133 lines
3.6 KiB
TypeScript
import { AudioResource } from "@discordjs/voice";
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import { LoopOption, Track } from "./types.js";
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/**
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* Length of playback status bar in emoji symbols.
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*
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* @intenal
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*/
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const STATUSBAR_LENGTH = 15;
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/**
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* Generates pretty playback status bar out of {@link AudioResource}.
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*
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* @remarks Takes duration and current playback duration to 'draw' bar.
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*
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* @returns String representing generated status bar.
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*
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* @param resource - AudioResource with {@link Track} metadata, so duration and playback duration is available.
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*
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* @privateRemarks I don't know why resource can be undefined - I forgor.
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*
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* @public
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*/
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export function statusBarGenerator(resource?: AudioResource<Track>): string {
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const duration = resource?.metadata.duration || 1;
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const playback = Math.min((resource?.playbackDuration || 0) / 1000, duration);
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const filled = Array<string>(Math.floor((STATUSBAR_LENGTH * playback) / duration)).fill("🔹");
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const empty = Array<string>(STATUSBAR_LENGTH - filled.length).fill("▫️");
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return `[${filled.join("")}${empty.join("")}] ${toISOTime(playback)}/${toISOTime(duration)}`;
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}
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/**
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* Converts seconds to ISO time string.
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*
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* @returns String representing given seconds in ISO format.
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*
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* @param amount - Seconds to convert.
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*
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* @example
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* ```
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* toISOTime(1337228); // "371:27:08"
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* ```
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*
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* @public
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*/
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export function toISOTime(amount: number): string {
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const h = Math.floor(amount / 3600);
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const m = Math.floor((amount % 3600) / 60);
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const s = Math.floor((amount % 3600) % 60);
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const hDisplay = h > 0 ? `${h}:` : "";
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const mDisplay = `${Math.floor(m / 10)}${Math.floor(m % 10)}:`;
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const sDisplay = `${Math.floor(s / 10)}${Math.floor(s % 10)}`;
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return hDisplay + mDisplay + sDisplay;
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}
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/**
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* Asynchronous timeout.
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*
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* @returns Promise that will be settled after timeout pass.
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*
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* @param amount - Milliseconds to wait before settle.
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*
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* @public
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*/
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export async function asleep(amount: number): Promise<unknown> {
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return new Promise((r) => setTimeout(r, amount));
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}
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/**
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* Converts volume value to emoji representation.
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*
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* @remarks In span of 0 ... 100 - emoji from muted to loud.
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*
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* @returns String with single emoji representing specified volume.
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*
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* @param amount - volume to convert.
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*
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* @public
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*/
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export function volumeMoji(amount: number): string {
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return amount > 100 ? "🔊" : amount > 50 ? "🔉" : amount > 0 ? "🔈" : "🔇";
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}
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/**
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* Converts {@link LoopOption} to emoji representation..
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*
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* @returns String with single emoji representing specified loop option.
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*
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* @param loop - Loop option that will be converted.
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*
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* @public
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*/
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export function loopMoji(loop: LoopOption): string {
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return loop === "AUTO" ? "🔀" : loop === "LOOP" ? "🔁" : loop === "NONE" ? "⤵️" : "🔂";
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}
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/**
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* Finds larges common sequence (LCS) of characters withing provided strings.
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*
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* @remarks Used to fuzzy search query title of Track.
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*
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* @returns Length of the LCS found.
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*
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* @param s1 - First string.
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* @param s2 - Second string.
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*
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* @public
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*/
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export function largestCommonSequence(s1: string, s2: string): number {
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s1 = s1.toLowerCase().slice(0, 100);
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s2 = s2.toLowerCase().slice(0, 100);
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const buffer = Array.from(Array(s1.length + 1), () => new Array<number>(s2.length + 1).fill(0));
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for (let i = 1; i <= s1.length; i++) {
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for (let j = 1; j <= s2.length; j++) {
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if (s1[i - 1] === s2[j - 1]) {
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buffer[i][j] = buffer[i - 1][j - 1] + 1;
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} else {
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buffer[i][j] = Math.max(buffer[i - 1][j], buffer[i][j - 1]);
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}
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}
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}
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return buffer[s1.length][s2.length];
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}
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