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emoji.js 20.25 KiB 
// prettier-ignore
/* eslint-disable */

/**
 * Forked from https://github.com/discourse/discourse/blob/6f8c91254ec816b25d73b9edadebc8db2e76edd2/app/assets/javascripts/pretty-text/addon/emoji.js
 */

 import {
//   aliases,
   emojis,
//   replacements,
//   searchAliases,
//   tonableEmojis,
//   translations,
 } from './emoji-data'
const aliases = {}
// const emojis = []
const replacements = {}
const searchAliases = {}
const tonableEmojis = []
const translations = {}

const IMAGE_VERSION = 12

const extendedEmoji = {}

export function registerEmoji(code, url, group) {
  code = code.toLowerCase()
  extendedEmoji[code] = { url, group }
}

export function extendedEmojiList() {
  return extendedEmoji
}

const emojiHash = {}

// https://github.com/mathiasbynens/emoji-regex/blob/main/text.js
export const emojiReplacementRegex =
  '\uD83C\uDFF4\uDB40\uDC67\uDB40\uDC62(?:\uDB40\uDC77\uDB40\uDC6C\uDB40\uDC73|\uDB40\uDC73\uDB40\uDC63\uDB40\uDC74|\uDB40\uDC65\uDB40\uDC6E\uDB40\uDC67)\uDB40\uDC7F|(?:\uD83E\uDDD1\uD83C\uDFFF\u200D\u2764\uFE0F\u200D(?:\uD83D\uDC8B\u200D)?\uD83E\uDDD1|\uD83D\uDC69\uD83C\uDFFF\u200D\uD83E\uDD1D\u200D(?:\uD83D[\uDC68\uDC69]))(?:\uD83C[\uDFFB-\uDFFE])|(?:\uD83E\uDDD1\uD83C\uDFFE\u200D\u2764\uFE0F\u200D(?:\uD83D\uDC8B\u200D)?\uD83E\uDDD1|\uD83D\uDC69\uD83C\uDFFE\u200D\uD83E\uDD1D\u200D(?:\uD83D[\uDC68\uDC69]))(?:\uD83C[\uDFFB-\uDFFD\uDFFF])|(?:\uD83E\uDDD1\uD83C\uDFFD\u200D\u2764\uFE0F\u200D(?:\uD83D\uDC8B\u200D)?\uD83E\uDDD1|\uD83D\uDC69\uD83C\uDFFD\u200D\uD83E\uDD1D\u200D(?:\uD83D[\uDC68\uDC69]))(?:\uD83C[\uDFFB\uDFFC\uDFFE\uDFFF])|(?:\uD83E\uDDD1\uD83C\uDFFC\u200D\u2764\uFE0F\u200D(?:\uD83D\uDC8B\u200D)?\uD83E\uDDD1|\uD83D\uDC69\uD83C\uDFFC\u200D\uD83E\uDD1D\u200D(?:\uD83D[\uDC68\uDC69]))(?:\uD83C[\uDFFB\uDFFD-\uDFFF])|(?:\uD83E\uDDD1\uD83C\uDFFB\u200D\u2764\uFE0F\u200D(?:\uD83D\uDC8B\u200D)?\uD83E\uDDD1|\uD83D\uDC69\uD83C\uDFFB\u200D\uD83E\uDD1D\u200D(?:\uD83D[\uDC68\uDC69]))(?:\uD83C[\uDFFC-\uDFFF])|\uD83D\uDC68(?:\uD83C\uDFFB(?:\u200D(?:\u2764\uFE0F\u200D(?:\uD83D\uDC8B\u200D\uD83D\uDC68(?:\uD83C[\uDFFB-\uDFFF])|\uD83D\uDC68(?:\uD83C[\uDFFB-\uDFFF]))|\uD83E\uDD1D\u200D\uD83D\uDC68(?:\uD83C[\uDFFC-\uDFFF])|[\u2695\u2696\u2708]\uFE0F|\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD]))?|(?:\uD83C[\uDFFC-\uDFFF])\u200D\u2764\uFE0F\u200D(?:\uD83D\uDC8B\u200D\uD83D\uDC68(?:\uD83C[\uDFFB-\uDFFF])|\uD83D\uDC68(?:\uD83C[\uDFFB-\uDFFF]))|\u200D(?:\u2764\uFE0F\u200D(?:\uD83D\uDC8B\u200D)?\uD83D\uDC68|(?:\uD83D[\uDC68\uDC69])\u200D(?:\uD83D\uDC66\u200D\uD83D\uDC66|\uD83D\uDC67\u200D(?:\uD83D[\uDC66\uDC67]))|\uD83D\uDC66\u200D\uD83D\uDC66|\uD83D\uDC67\u200D(?:\uD83D[\uDC66\uDC67])|\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD])|\uD83C\uDFFF\u200D(?:\uD83E\uDD1D\u200D\uD83D\uDC68(?:\uD83C[\uDFFB-\uDFFE])|\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD])|\uD83C\uDFFE\u200D(?:\uD83E\uDD1D\u200D\uD83D\uDC68(?:\uD83C[\uDFFB-\uDFFD\uDFFF])|\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD])|\uD83C\uDFFD\u200D(?:\uD83E\uDD1D\u200D\uD83D\uDC68(?:\uD83C[\uDFFB\uDFFC\uDFFE\uDFFF])|\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD])|\uD83C\uDFFC\u200D(?:\uD83E\uDD1D\u200D\uD83D\uDC68(?:\uD83C[\uDFFB\uDFFD-\uDFFF])|\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD])|(?:\uD83C\uDFFF\u200D[\u2695\u2696\u2708]|\uD83C\uDFFE\u200D[\u2695\u2696\u2708]|\uD83C\uDFFD\u200D[\u2695\u2696\u2708]|\uD83C\uDFFC\u200D[\u2695\u2696\u2708]|\u200D[\u2695\u2696\u2708])\uFE0F|\u200D(?:(?:\uD83D[\uDC68\uDC69])\u200D(?:\uD83D[\uDC66\uDC67])|\uD83D[\uDC66\uDC67])|\uD83C\uDFFF|\uD83C\uDFFE|\uD83C\uDFFD|\uD83C\uDFFC)?|(?:\uD83D\uDC69(?:\uD83C\uDFFB\u200D\u2764\uFE0F\u200D(?:\uD83D\uDC8B\u200D(?:\uD83D[\uDC68\uDC69])|\uD83D[\uDC68\uDC69])|(?:\uD83C[\uDFFC-\uDFFF])\u200D\u2764\uFE0F\u200D(?:\uD83D\uDC8B\u200D(?:\uD83D[\uDC68\uDC69])|\uD83D[\uDC68\uDC69]))|\uD83E\uDDD1(?:\uD83C[\uDFFB-\uDFFF])\u200D\uD83E\uDD1D\u200D\uD83E\uDDD1)(?:\uD83C[\uDFFB-\uDFFF])|\uD83D\uDC69\u200D\uD83D\uDC69\u200D(?:\uD83D\uDC66\u200D\uD83D\uDC66|\uD83D\uDC67\u200D(?:\uD83D[\uDC66\uDC67]))|\uD83D\uDC69(?:\u200D(?:\u2764\uFE0F\u200D(?:\uD83D\uDC8B\u200D(?:\uD83D[\uDC68\uDC69])|\uD83D[\uDC68\uDC69])|\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD])|\uD83C\uDFFF\u200D(?:\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD])|\uD83C\uDFFE\u200D(?:\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD])|\uD83C\uDFFD\u200D(?:\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD])|\uD83C\uDFFC\u200D(?:\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD])|\uD83C\uDFFB\u200D(?:\uD83C[\uDF3E\uDF73\uDF7C\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD]))|\uD83E\uDDD1(?:\u200D(?:\uD83E\uDD1D\u200D\uD83E\uDDD1|\uD83C[\uDF3E\uDF73\uDF7C\uDF84\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E[\uDDAF-\uDDB3\uDDBC\uDDBD])|\uD83C\uDFFF\u200D(?:\uD83C[\uDF3E\uDF73\uDF7C\uDF84\uDF93\uDFA4\uDFA8\uDFE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EA\uDDEC\uDDEF\uDDF0\uDDF2\uDDF4\uDDFF])|\uD83C\uDDE8(?:\uD83C[\uDDE6\uDDE8\uDDE9\uDDEB-\uDDEE\uDDF0-\uDDF5\uDDF7\uDDFA-\uDDFF])|\uD83C\uDDE7(?:\uD83C[\uDDE6\uDDE7\uDDE9-\uDDEF\uDDF1-\uDDF4\uDDF6-\uDDF9\uDDFB\uDDFC\uDDFE\uDDFF])|\uD83C\uDDE6(?:\uD83C[\uDDE8-\uDDEC\uDDEE\uDDF1\uDDF2\uDDF4\uDDF6-\uDDFA\uDDFC\uDDFD\uDDFF])|[#*0-9]\uFE0F\u20E3|\u2764\uFE0F|(?:\uD83C[\uDFC3\uDFC4\uDFCA]|\uD83D[\uDC6E\uDC70\uDC71\uDC73\uDC77\uDC81\uDC82\uDC86\uDC87\uDE45-\uDE47\uDE4B\uDE4D\uDE4E\uDEA3\uDEB4-\uDEB6]|\uD83E[\uDD26\uDD35\uDD37-\uDD39\uDD3D\uDD3E\uDDB8\uDDB9\uDDCD-\uDDCF\uDDD4\uDDD6-\uDDDD])(?:\uD83C[\uDFFB-\uDFFF])|(?:\u26F9|\uD83C[\uDFCB\uDFCC]|\uD83D\uDD75)(?:\uFE0F|\uD83C[\uDFFB-\uDFFF])|\uD83C\uDFF4|(?:[\u270A\u270B]|\uD83C[\uDF85\uDFC2\uDFC7]|\uD83D[\uDC42\uDC43\uDC46-\uDC50\uDC66\uDC67\uDC6B-\uDC6D\uDC72\uDC74-\uDC76\uDC78\uDC7C\uDC83\uDC85\uDC8F\uDC91\uDCAA\uDD7A\uDD95\uDD96\uDE4C\uDE4F\uDEC0\uDECC]|\uD83E[\uDD0C\uDD0F\uDD18-\uDD1C\uDD1E\uDD1F\uDD30-\uDD34\uDD36\uDD77\uDDB5\uDDB6\uDDBB\uDDD2\uDDD3\uDDD5])(?:\uD83C[\uDFFB-\uDFFF])|(?:[\u261D\u270C\u270D]|\uD83D[\uDD74\uDD90])(?:\uFE0F|\uD83C[\uDFFB-\uDFFF])|[\u270A\u270B]|\uD83C[\uDF85\uDFC2\uDFC7]|\uD83D[\uDC08\uDC15\uDC3B\uDC42\uDC43\uDC46-\uDC50\uDC66\uDC67\uDC6B-\uDC6D\uDC72\uDC74-\uDC76\uDC78\uDC7C\uDC83\uDC85\uDC8F\uDC91\uDCAA\uDD7A\uDD95\uDD96\uDE2E\uDE35\uDE36\uDE4C\uDE4F\uDEC0\uDECC]|\uD83E[\uDD0C\uDD0F\uDD18-\uDD1C\uDD1E\uDD1F\uDD30-\uDD34\uDD36\uDD77\uDDB5\uDDB6\uDDBB\uDDD2\uDDD3\uDDD5]|\uD83C[\uDFC3\uDFC4\uDFCA]|\uD83D[\uDC6E\uDC70\uDC71\uDC73\uDC77\uDC81\uDC82\uDC86\uDC87\uDE45-\uDE47\uDE4B\uDE4D\uDE4E\uDEA3\uDEB4-\uDEB6]|\uD83E[\uDD26\uDD35\uDD37-\uDD39\uDD3D\uDD3E\uDDB8\uDDB9\uDDCD-\uDDCF\uDDD4\uDDD6-\uDDDD]|\uD83D\uDC6F|\uD83E[\uDD3C\uDDDE\uDDDF]|[\u231A\u231B\u23E9-\u23EC\u23F0\u23F3\u25FD\u25FE\u2614\u2615\u2648-\u2653\u267F\u2693\u26A1\u26AA\u26AB\u26BD\u26BE\u26C4\u26C5\u26CE\u26D4\u26EA\u26F2\u26F3\u26F5\u26FA\u26FD\u2705\u2728\u274C\u274E\u2753-\u2755\u2757\u2795-\u2797\u27B0\u27BF\u2B1B\u2B1C\u2B50\u2B55]|\uD83C[\uDC04\uDCCF\uDD8E\uDD91-\uDD9A\uDE01\uDE1A\uDE2F\uDE32-\uDE36\uDE38-\uDE3A\uDE50\uDE51\uDF00-\uDF20\uDF2D-\uDF35\uDF37-\uDF7C\uDF7E-\uDF84\uDF86-\uDF93\uDFA0-\uDFC1\uDFC5\uDFC6\uDFC8\uDFC9\uDFCF-\uDFD3\uDFE0-\uDFF0\uDFF8-\uDFFF]|\uD83D[\uDC00-\uDC07\uDC09-\uDC14\uDC16-\uDC3A\uDC3C-\uDC3E\uDC40\uDC44\uDC45\uDC51-\uDC65\uDC6A\uDC79-\uDC7B\uDC7D-\uDC80\uDC84\uDC88-\uDC8E\uDC90\uDC92-\uDCA9\uDCAB-\uDCFC\uDCFF-\uDD3D\uDD4B-\uDD4E\uDD50-\uDD67\uDDA4\uDDFB-\uDE2D\uDE2F-\uDE34\uDE37-\uDE44\uDE48-\uDE4A\uDE80-\uDEA2\uDEA4-\uDEB3\uDEB7-\uDEBF\uDEC1-\uDEC5\uDED0-\uDED2\uDED5-\uDED7\uDEEB\uDEEC\uDEF4-\uDEFC\uDFE0-\uDFEB]|\uD83E[\uDD0D\uDD0E\uDD10-\uDD17\uDD1D\uDD20-\uDD25\uDD27-\uDD2F\uDD3A\uDD3F-\uDD45\uDD47-\uDD76\uDD78\uDD7A-\uDDB4\uDDB7\uDDBA\uDDBC-\uDDCB\uDDD0\uDDE0-\uDDFF\uDE70-\uDE74\uDE78-\uDE7A\uDE80-\uDE86\uDE90-\uDEA8\uDEB0-\uDEB6\uDEC0-\uDEC2\uDED0-\uDED6]|(?:[#*0-9\xA9\xAE\u203C\u2049\u2122\u2139\u2194-\u2199\u21A9\u21AA\u231A\u231B\u2328\u23CF\u23E9-\u23F3\u23F8-\u23FA\u24C2\u25AA\u25AB\u25B6\u25C0\u25FB-\u25FE\u2600-\u2604\u260E\u2611\u2614\u2615\u2618\u261D\u2620\u2622\u2623\u2626\u262A\u262E\u262F\u2638-\u263A\u2640\u2642\u2648-\u2653\u265F\u2660\u2663\u2665\u2666\u2668\u267B\u267E\u267F\u2692-\u2697\u2699\u269B\u269C\u26A0\u26A1\u26A7\u26AA\u26AB\u26B0\u26B1\u26BD\u26BE\u26C4\u26C5\u26C8\u26CE\u26CF\u26D1\u26D3\u26D4\u26E9\u26EA\u26F0-\u26F5\u26F7-\u26FA\u26FD\u2702\u2705\u2708-\u270D\u270F\u2712\u2714\u2716\u271D\u2721\u2728\u2733\u2734\u2744\u2747\u274C\u274E\u2753-\u2755\u2757\u2763\u2764\u2795-\u2797\u27A1\u27B0\u27BF\u2934\u2935\u2B05-\u2B07\u2B1B\u2B1C\u2B50\u2B55\u3030\u303D\u3297\u3299]|\uD83C[\uDC04\uDCCF\uDD70\uDD71\uDD7E\uDD7F\uDD8E\uDD91-\uDD9A\uDDE6-\uDDFF\uDE01\uDE02\uDE1A\uDE2F\uDE32-\uDE3A\uDE50\uDE51\uDF00-\uDF21\uDF24-\uDF93\uDF96\uDF97\uDF99-\uDF9B\uDF9E-\uDFF0\uDFF3-\uDFF5\uDFF7-\uDFFF]|\uD83D[\uDC00-\uDCFD\uDCFF-\uDD3D\uDD49-\uDD4E\uDD50-\uDD67\uDD6F\uDD70\uDD73-\uDD7A\uDD87\uDD8A-\uDD8D\uDD90\uDD95\uDD96\uDDA4\uDDA5\uDDA8\uDDB1\uDDB2\uDDBC\uDDC2-\uDDC4\uDDD1-\uDDD3\uDDDC-\uDDDE\uDDE1\uDDE3\uDDE8\uDDEF\uDDF3\uDDFA-\uDE4F\uDE80-\uDEC5\uDECB-\uDED2\uDED5-\uDED7\uDEE0-\uDEE5\uDEE9\uDEEB\uDEEC\uDEF0\uDEF3-\uDEFC\uDFE0-\uDFEB]|\uD83E[\uDD0C-\uDD3A\uDD3C-\uDD45\uDD47-\uDD78\uDD7A-\uDDCB\uDDCD-\uDDFF\uDE70-\uDE74\uDE78-\uDE7A\uDE80-\uDE86\uDE90-\uDEA8\uDEB0-\uDEB6\uDEC0-\uDEC2\uDED0-\uDED6]|☻|♡)\uFE0F?'

function textEmojiRegex(inlineEmoji) {
  return inlineEmoji ? /:[^\s:]+(?::t\d)?:?/g : /\B:[^\s:]+(?::t\d)?:?\B/g
}

// add all default emojis
emojis.forEach((code) => (emojiHash[code] = true))

// and their aliases
const aliasHash = {}
Object.keys(aliases).forEach((name) => {
  aliases[name].forEach((alias) => (aliasHash[alias] = name))
})

function isReplacableInlineEmoji(string, index, inlineEmoji) {
  if (inlineEmoji) {
    return true
  }

  // index depends on regex; when `inlineEmoji` is false, the regex starts
  // with a `\B` character, so there's no need to subtract from the index
  const beforeEmoji = string.slice(0, index)

  return (
    beforeEmoji.length === 0 ||
    /(?:\s|[>.,\/#!$%^&*;:{}=\-_`~()])$/.test(beforeEmoji) ||
    new RegExp(`(?:${emojiReplacementRegex})$`, 'g').test(beforeEmoji)
  )
}

export function performEmojiUnescape(string, opts) {
  if (!string) {
    return
  }

  const allTranslations = Object.assign(
    {},
    translations,
    opts.customEmojiTranslation || {}
  )

  const replacementFunction = (m, index) => {
    const isEmoticon = opts.enableEmojiShortcuts && !!allTranslations[m]
    const isUnicodeEmoticon = !!replacements[m]
    let emojiVal

    if (isEmoticon) {
      emojiVal = allTranslations[m]
    } else if (isUnicodeEmoticon) {
      emojiVal = replacements[m]
    } else {
      emojiVal = m.slice(1, m.length - 1)
    }
    const hasEndingColon = m.lastIndexOf(':') === m.length - 1
    const url = buildEmojiUrl(emojiVal, opts)
    let classes = isCustomEmoji(emojiVal, opts) ? 'emoji emoji-custom' : 'emoji'

    if (opts.class) {
      classes = `${classes} ${opts.class}`
    }

    const isReplacable =
      (isEmoticon || hasEndingColon || isUnicodeEmoticon) &&
      isReplacableInlineEmoji(string, index, opts.inlineEmoji)

    return url && isReplacable
      ? `<img width="20" height="20" src='${url}' ${
          opts.skipTitle ? '' : `title='${emojiVal}'`
        } ${
          opts.lazy ? "loading='lazy' " : ''
        }alt='${emojiVal}' class='${classes}'>`
      : m
  }

  return string
    .replace(new RegExp(emojiReplacementRegex, 'g'), replacementFunction)
    .replace(textEmojiRegex(opts.inlineEmoji), replacementFunction)
}

export function performEmojiEscape(string, opts) {
  const allTranslations = Object.assign(
    {},
    translations,
    opts.customEmojiTranslation || {}
  )

  const replacementFunction = (m, index) => {
    if (isReplacableInlineEmoji(string, index, opts.inlineEmoji)) {
      if (allTranslations[m]) {
        return opts.emojiShortcuts ? `:${allTranslations[m]}:` : m
      } else if (replacements[m]) {
        return `:${replacements[m]}:`
      }
    }

    return m
  }

  return string
    .replace(new RegExp(emojiReplacementRegex, 'g'), replacementFunction)
    .replace(textEmojiRegex(opts.inlineEmoji), replacementFunction)
}

export function isCustomEmoji(code, opts) {
  code = code.toLowerCase()
  if (extendedEmoji.hasOwnProperty(code)) {
    return true
  }
  if (opts && opts.customEmoji && opts.customEmoji.hasOwnProperty(code)) {
    return true
  }
  return false
}

export function buildEmojiUrl(code, opts) {
  let url
  code = String(code).toLowerCase()
  if (extendedEmoji.hasOwnProperty(code)) {
    url = extendedEmoji[code].url
  }

  if (opts && opts.customEmoji && opts.customEmoji[code]) {
    url = opts.customEmoji[code].url || opts.customEmoji[code]
  }

  const noToneMatch = code.match(/([^:]+):?/)

  let emojiBasePath = '/images/emoji'
  if (opts.emojiCDNUrl) {
    emojiBasePath = opts.emojiCDNUrl
  }
  if (
    noToneMatch &&
    !url &&
    (emojiHash.hasOwnProperty(noToneMatch[1]) ||
      aliasHash.hasOwnProperty(noToneMatch[1]))
  ) {
    url = opts.getURL(
      `${emojiBasePath}/${opts.emojiSet}/${code.replace(/:t/, '/')}.png`
    )
  }

  if (url) {
    url = url + '?v=' + IMAGE_VERSION
  }

  return url
}

export function emojiExists(code) {
  code = code.toLowerCase()
  return !!(
    extendedEmoji.hasOwnProperty(code) ||
    emojiHash.hasOwnProperty(code) ||
    aliasHash.hasOwnProperty(code)
  )
}

let toSearch
export function emojiSearch(term, options) {
  const maxResults = (options && options.maxResults) || -1
  const diversity = options && options.diversity
  if (maxResults === 0) {
    return []
  }

  toSearch =
    toSearch ||
    [
      ...Object.keys(emojiHash),
      ...Object.keys(extendedEmoji),
      ...Object.keys(aliasHash),
    ].sort()

  const results = []

  function addResult(t) {
    const val = aliasHash[t] || t
    if (!results.includes(val)) {
      if (diversity && diversity > 1 && isSkinTonableEmoji(val)) {
        results.push(`${val}:t${diversity}`)
      } else {
        results.push(val)
      }
    }
  }

  // if term matches from beginning
  for (let i = 0; i < toSearch.length; i++) {
    const item = toSearch[i]
    if (item.indexOf(term) === 0) {
      addResult(item)
    }
  }

  for (const [key, value] of Object.entries(searchAliases)) {
    if (key.startsWith(term)) {
      for (const emoji of value) {
        addResult(emoji)
      }
    }
  }

  for (let i = 0; i < toSearch.length; i++) {
    const item = toSearch[i]
    if (item.indexOf(term) > 0) {
      addResult(item)
    }
  }

  if (maxResults === -1) {
    return results
  } else {
    return results.slice(0, maxResults)
  }
}

export function isSkinTonableEmoji(term) {
  const match = term.split(':').filter(Boolean)[0]
  if (match) {
    return tonableEmojis.includes(match)
  }
  return false
}