emoji-from-text/lib/index.js

Get relevant emoji for a given input text.

"use strict";

var emojiFromWord = require("emoji-from-word"),
    countWordsArray = require("count-words-array");

/**
 * emojiFromText
 *
 * @name emojiFromText
 * @function
 * @param {String} s The input text.
 * @param {Boolean} f If `true`, only the first object from array will be returned.
 * @return {Array} An array of objects containing:
 *
 *  - `name` (String): The word name.
 *  - `score` (Number): The match score.
 *  - `match` (Match): A [`Match`](https://github.com/IonicaBizau/emoji-from-word#matchinput) instance.
 *
 * The array is ordered by score.
 */
module.exports = function emojiFromText(s, f) {

    if (f) {
        return emojiFromText(s)[0];
    }

    var w = countWordsArray(s, true);

    w.forEach(function (c) {
        c.match = emojiFromWord(c.name);

        if (!c.match.emoji_name) {
            c.match = emojiFromWord("memo");
            c.match.score = 0.2;
        }

        c.score = (c.match.score * 4 + c.name.length * 2 + c.count * 3 + c.match.emoji_name.length * 0.5) / 4;
    });

    w.sort(function (a, b) {
        return a.score < b.score ? 1 : -1;
    });

    return w;
};