generate 4get config from env variables

docker/gen_config.php

@@ -0,0 +1,74 @@
+ <?php
+
+include "/var/www/html/4get/data/config.php";
+
+$refl = new ReflectionClass('config');
+$config = ($refl->getConstants());
+
+$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);
+        $config[$target_key] = $val;
+};
+
+function type_to_string($n) {
+        $type = gettype($n);
+        if ($type === "NULL") {
+                return "null";
+        }
+        if ($type === "boolean") {
+                return $n ? 'true' : 'false';
+        }
+        if ($type === "string") {
+                return "\"$n\"";
+        }
+        if ($type === "array") {
+                return json_encode($n);
+        }
+        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 = ["CAPTCHA_DATASET"];
+
+$output = "<?php\n // This file was generated by docker/gen_config.php\n";
+
+$output = $output . "class config {\n";
+foreach(($config) as $key => $val){
+        if(!in_array($key, $special_keys)) {
+$output = $output . "\tconst " . $key . " = " . type_to_string($val) . ";\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);
+?>