4get/docker/gen_config.php

 <?php

include "/var/www/html/4get/data/config.php";

$refl = new ReflectionClass('config');
$from_config = ($refl->getConstants());
$from_env = array();

$env = getenv();
$fourget_env = array_filter($env, function($v, $k) {
        return str_starts_with($k, "FOURGET");
}, ARRAY_FILTER_USE_BOTH);

foreach($fourget_env as $key => $val)  {
        $target_key = preg_replace('/^FOURGET_/', '', $key);
        $from_env[$target_key] = trim($val, '\'"');
};

$merged_config = array_merge($from_config, $from_env);

function type_to_string($n) {
        $type = gettype($n);
        if ($type === "NULL") {
                return "null";
        }
        if ($type === "boolean") {
                return $n ? 'true' : 'false';
        }
        if ($type === "string") {
                if(is_numeric($n)) {
                        return $n;
                }
                return "\"$n\"";
        }
        if ($type === "array") {
                return json_encode($n, JSON_UNESCAPED_SLASHES);
        }
        return $n;
}


function detect_captcha_dirs() {
        $captcha_dir = "/var/www/html/4get/data/captcha/";
        $categories = (array_map(function ($n) {
                return explode("/", $n)[7];
        }, glob($captcha_dir . "*")));


        $result = array_map(function($category) {
                return [$category, count(glob("/var/www/html/4get/data/captcha/" . $category . "/*" ))];
        }, $categories);

        return $result;
}


$special_keys = ["PROTO", "CAPTCHA_DATASET"];

$output = "<?php\n // This file was generated by docker/gen_config.php\n";

$output = $output . "class config {\n";
foreach(($merged_config) as $key => $val){
        if(!in_array($key, $special_keys)) {
            $stored_value = $val;
            // conversion between arrays and comma separated env value. 
            // Handle case when original type of field is array and there is a type mismatch when a comma separted string is passed, 
            // then split on comma if string (and not numeric, boolean, null, etc)
            // 
            // except in the case where the inital value in default config is null or boolean. Assuming null and boolean
            // in default config will be never be assigned an array
            
            if(gettype($from_config[$key]) != gettype($val) && !is_numeric($val) && !is_null($from_config[$key]) && gettype($from_config[$key]) != "boolean") {
                $stored_value = explode(",", $val);
            } 
            $output = $output . "\tconst " . $key . " = " . type_to_string($stored_value) . ";\n";

            continue;
        }


        if($key === "CAPTCHA_DATASET") {
                $output = $output . "\tconst " . $key . " = " . type_to_string(detect_captcha_dirs()) . ";\n";
        }
}

$output = $output . "}\n";
$output = $output . "?>";

file_put_contents("./data/config.php", $output);
?>