<?php

$em_dir = SRCDIR . "/static/emoticons";
$emoticons = array_map(
    fn($i) => [
        pathinfo($i, PATHINFO_FILENAME),
        ...array_slice(getimagesize($em_dir . "/" . $i), 0, 2),
    ],
    array_values(
        array_filter(
            scandir($em_dir),
            fn($i) =>
                $i[0] !== "." &&
                is_file($em_dir . "/" . $i) &&
                strtolower(pathinfo($i, PATHINFO_EXTENSION)) === "gif"
        )
    )
);

usort($emoticons, fn($a, $b) => strlen($b[0]) <=> strlen($a[0]));

$emoticons_alpha_lookup = [];
foreach ($emoticons as $i => $emoticon) {
    $emoticons_alpha_lookup []= [$i, $emoticon[0]];
}
usort($emoticons_alpha_lookup, fn($a, $b) => $a[1] <=> $b[1]);
$emoticons_alpha_lookup = array_column($emoticons_alpha_lookup, 0);

return [
    "emoticons.js",
    "/* auto-generated at " . date("c") . " */\nvar EMOTICONS = " .
        json_encode([
            $emoticons,
            $emoticons_alpha_lookup,
        ]) . ";\n",
];