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// Copyright 2020-2022 the denosaurs team. All rights reserved. MIT license.
import type { Emoji } from "./types.ts";import emojis from "./all.json" assert { type: "json" };import { reUnicode } from "./unicode.ts";
// Regex to parse emoji in a string - e.g. :coffee:const reEmojiName = /:([a-zA-Z0-9_\-\+]+):/g;
// Regex to trim whitespace. (with IE8 support)const reTrimSpace = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
// Non spacing mark, some emoticons have them. It's the 'Variant Form',// which provides more information so that emoticons can be rendered as// more colorful graphics. FE0E is a unicode text version, where as FE0F// should be rendered as a graphical version. The code gracefully degrades.const NON_SPACING_MARK = String.fromCharCode(65039); // 65039 - '️' - 0xFE0F;const reNonSpacing = new RegExp(NON_SPACING_MARK, "g");
/** Remove NON_SPACING_MARK from string. See above. */function stripNSB(code: string): string {  return code.replace(reNonSpacing, "");}
/** Removes colons on either side of the string. */function stripColons(str: string): string {  const colonIndex = str.indexOf(":");  if (colonIndex > -1) {    if (colonIndex === str.length - 1) {      str = str.substring(0, colonIndex);      return stripColons(str);    } else {      str = str.substr(colonIndex + 1);      return stripColons(str);    }  }
  return str;}
/** Adds colons to either side of the string. */function wrapColons(str: string): string {  return str.length > 0 ? ":" + str + ":" : str;}
type EmojiMap = { [alias: string]: Emoji };
const byAlias: EmojiMap = Object.fromEntries(  emojis.map((emoji) => emoji.aliases.map((alias) => [alias, emoji])).flat(),);
const byCode: EmojiMap = Object.fromEntries(  emojis.map((emoji) => {    return [stripNSB(emoji.emoji), emoji];  }),);
/** Get all emojis. */export function all(): Emoji[] {  return emojis;}
/** Get all emojis as alias map. */export function aliasMap(): EmojiMap {  return byAlias;}
/** Get all emojis as code map. */export function codeMap(): EmojiMap {  return byCode;}
/** Get emoji from alias. - e.g. "unicorn" -> 🦄 */export function get(alias: string): string {  return byAlias[stripColons(alias)]?.emoji;}
/** Get alias from emoji. - e.g. 👕 -> "shirt" */export function alias(emoji: string): string {  return byCode[stripNSB(emoji)]?.aliases[0];}
/** Get alias from emoji. - e.g. 👕 -> ["shirt", "tshirt"] */export function aliases(emoji: string): string[] {  return byCode[stripNSB(emoji)]?.aliases;}
/** Get emoji info from alias or emoji */export function infoByAlias(raw: string): Emoji | undefined {  return byAlias[stripColons(raw)];}
/** Get emoji info from alias or emoji */export function infoByCode(raw: string): Emoji | undefined {  return byCode[stripNSB(raw)];}
/** Get random emoji. - e.g. {emoji: "👕", alias: "shirt"} */export function random(): { emoji: string; alias: string } {  const random = emojis[Math.floor(Math.random() * emojis.length)];  const emoji = random.emoji;  const alias = random.aliases[0];  return { emoji, alias };}
/** Strip all emojis in a string. */export function strip(str: string): string {  return replace(str, "", true);}
/** Replace all emojis in a string. */export function replace(  str: string,  replacement: string | ((emoji: Emoji) => string) = "",  trim = false,): string {  if (!str) return "";  const replace = typeof replacement === "function" ? replacement : () => {    return replacement;  };  const match = str.match(reUnicode) ?? [];  const result = match    .map((s, i) => {      const emoji = byCode[stripNSB(s)];      if (emoji && trim && match[i + 1] === " ") {        match[i + 1] = "";      }      return emoji ? replace(emoji) : s;    })    .join("");  return trim ? result.replace(reTrimSpace, "") : result;}
/** Replace all emoji names in a string with actual emojis. */export function emojify(str: string) {  if (!str) return "";  return str    .split(reEmojiName)    .map((s, i) => {      if (i % 2 === 0) return s;      let emoji = get(s);      if (!emoji) emoji = wrapColons(s);      return emoji;    })    .join("");}
/** Replace all emoji in a string with actual emoji names. */export function unemojify(str: string) {  return replace(str, (emoji) => wrapColons(emoji.aliases[0]));}
/** Tagged template version of emojify */export function emoji(template: TemplateStringsArray, ...args: string[]) {  const chunks = [];  for (let i = 0; i < template.length; i++) {    chunks.push(emojify(template[i]));    if (args[i]) chunks.push(emojify(args[i]));  }  return chunks.join("");}