Main Emoji EN

Emoji.kt

/**
* An object containing information about the emoji being processed.
*/
data class Emoji(val emoji: String, @DrawableRes val resource: Int)


/**
* A list of emojis we can customize
*/
val EMOJIS: List<Emoji> = listOf(
   Emoji("\ud83d\ude42", R.drawable.simple_smile), // 🙂
   Emoji("\ud83d\udc69\u200d\ud83d\udcbb", R.drawable.female_engineer), // 👩‍💻
   Emoji("\ud83d\ude0e", R.drawable.smiling_with_sunglasses) // 😎
)


/**
* Generates a regular expression to find all emoji from a list.
*/
fun List<Emoji>.toRegex(): Regex {
   val pattern = joinToString(separator = "|") { emoji ->
       Regex.escape(emoji.emoji)
   }
   return Regex(pattern)
}


/**
* Gets an Emoji object based on the found emoji text
*/
fun List<Emoji>.getEmojiByText(emojiText: String): Emoji? {
   return firstOrNull { it.emoji == emojiText }
}


/**
* Finds all occurrences of an emoji from a list in text.
*/
fun List<Emoji>.findEmojisInText(text: String): List<EmojiRange> {
   return toRegex().findAll(text).mapNotNull { match ->
       getEmojiByText(match.value)?.let { emoji ->
           EmojiRange(emoji, match.range)
       }
   }.toList()
}


data class EmojiRange(
   val emoji: Emoji,
   val range: IntRange,
)