Use class map for autoloading

Close #7

scripts/buildClassMap.php

@@ -0,0 +1,39 @@
+<?PHP
+/**
+ * Generates a class map, based on a constant AUTOLOAD_DIRS.
+ *
+ * @author Joshua Ramon Enslin <joshua@museum-digital.de>
+ */
+declare(strict_types = 1);
+
+require_once __DIR__ . '/../inc/constants.php';
+
+$classesToAutoload = [];
+
+// Load list of classes
+
+foreach (AUTOLOAD_DIRS as $dir) {
+
+    $dir = str_replace(realpath(__DIR__ . "/../") . "/inc/../", "", $dir);
+    foreach (glob($dir . "/*.php") as $file) {
+        $classesToAutoload[pathinfo(__DIR__ . '/../' . $file, PATHINFO_FILENAME)] = $file;
+    }
+
+}
+
+// Output
+
+$output = [];
+
+foreach ($classesToAutoload as $key => $value) {
+
+    $output[] = '    \'' . $key . '\' => __DIR__ . \'/../' . $value . '\',';
+
+}
+
+$toWrite = '<?PHP
+const AUTOLOAD_CLASS_MAP = [
+' . implode(PHP_EOL, $output) . '
+];';
+
+file_put_contents("tmp-class-map.php", $toWrite);