kpop/lib/disassemble.js

Korean romanization utilities

var alpha = require('./alphabet');

function disassemble(str) {
    return str.split('').map(disassembleChar);
}

function disassembleChar(char) {
    // Return vowels and consonants as is
    if(alpha.isVowel(char) || alpha.isConsonant(char)) {
        return [char];
    }

    // Work on unicode code
    if(!isComplexChar(char)) {
        return [char];
    }

    return breakComplexChar(char);
}

function isComplexChar(char) {
    var code = char.charCodeAt(0);
    return (code >= alpha.UNICODE_START && alpha.UNICODE_END >= code );
}

function breakComplexChar(char) {
    var charCode = char.charCodeAt(0);
    var code = charCode - alpha.UNICODE_START;

    var final = code % 28;
    var medial = ((code - final) / 28) % 21;
    var intial = (((code - final) / 28) - medial) / 21;

    return [
        alpha.INITIALS[intial],
        alpha.MEDIALS[medial],
        alpha.FINALS[final],
    ];
}

module.exports = disassemble;