move to psr-4 autoloader

classes/PluginHandler.php

@@ -0,0 +1,29 @@
+<?php
+class PluginHandler extends Handler_Protected {
+	function csrf_ignore(string $method): bool {
+		return true;
+	}
+
+	function catchall(string $method): void {
+		$plugin_name = clean($_REQUEST["plugin"]);
+		$plugin = PluginHost::getInstance()->get_plugin($plugin_name);
+		$csrf_token = ($_POST["csrf_token"] ?? "");
+
+		if ($plugin) {
+			if (method_exists($plugin, $method)) {
+				if (validate_csrf($csrf_token) || $plugin->csrf_ignore($method)) {
+					$plugin->$method();
+				} else {
+					user_error("Rejected {$plugin_name}->{$method}(): invalid CSRF token.", E_USER_WARNING);
+					print Errors::to_json(Errors::E_UNAUTHORIZED);
+				}
+			} else {
+				user_error("Rejected {$plugin_name}->{$method}(): unknown method.", E_USER_WARNING);
+				print Errors::to_json(Errors::E_UNKNOWN_METHOD);
+			}
+		} else {
+			user_error("Rejected {$plugin_name}->{$method}(): unknown plugin.", E_USER_WARNING);
+			print Errors::to_json(Errors::E_UNKNOWN_PLUGIN);
+		}
+	}
+}