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// Evol functions.
// Author:
//    Reid
// Description:
//    Riddle enigma validator
//
// Arguments
//    0 PC answer
//    1 English correct answer
//    2 Translated correct answer

// TODO: levenshtein(), similar_text(), and maybe even soundex()

function	script	riddlevalidation	{
    .@answer$          = strip(strtolower(getarg(0)));
    .@good$            = strip(strtolower(getarg(1)));
    .@good_translated$ = strip(strtolower(getarg(2)));

    .@size_answer          = getstrlen(.@answer$);
    .@size_good            = getstrlen(.@good$);
    .@size_good_translated = getstrlen(.@good_translated$);

    .@max = max(.@size_answer, .@size_good_translated, .@size_good);

    // Input is too long.
    if (.@max > 30) {
        return false;
    }

    // if 90% of the word is correct
    .@size_good            *= 90;
    .@size_good_translated *= 90;

    freeloop(true);
    for (.@i = 0; .@i < .@max; .@i++)
    {
        .@correct            = 0;
        .@correct_translated = 0;

        for (.@k = .@k_translated = .@j = .@i; .@j < .@max; .@j++)
        {
            if (charat(.@answer$, .@j) == charat(.@good$, .@k)) {
                .@correct++;
                .@k++;
            } else {
                .@correct--;
            }

            if (charat(.@answer$, .@j) == charat(.@good_translated$, .@k_translated)) {
                .@correct_translated++;
                .@k_translated++;
            } else {
                .@correct_translated--;
            }
        }
        // if 70% of the word is correct
        .@correct *= 100;
        .@correct_translated *= 100;

        if (.@correct >= .@size_good ||
            .@correct_translated >= .@size_good_translated) {
            freeloop(false);
            return true;
        }
    }
    freeloop(false);

    return false;
}