Implement loading dependencies for mods

lib/mod_list.dart

@@ -5,13 +5,13 @@ import 'package:rimworld_modman/mod.dart';
 import 'package:xml/xml.dart';
 
 class ModList {
-  final String configPath;
-  final String modsPath;
+  String configPath = '';
+  String modsPath = '';
   // O(1) lookup
   Map<String, bool> activeMods = {};
   Map<String, Mod> mods = {};
 
-  ModList({required this.configPath, required this.modsPath});
+  ModList({this.configPath = '', this.modsPath = ''});
 
   Stream<Mod> loadAvailable() async* {
     final logger = Logger.instance;
@@ -184,6 +184,18 @@ class ModList {
     }
   }
 
+  void enableAll() {
+    for (final mod in mods.values) {
+      setEnabled(mod.id, true);
+    }
+  }
+
+  void disableAll() {
+    for (final mod in mods.values) {
+      setEnabled(mod.id, false);
+    }
+  }
+
   List<List<String>> checkIncompatibilities() {
     List<List<String>> conflicts = [];
     List<String> activeModIds = activeMods.keys.toList();
@@ -387,6 +399,20 @@ class ModList {
 
     return bestOrder;
   }
+
+  List<String> loadRequired() {
+    final toEnable = <String>[];
+    for (final modid in activeMods.keys) {
+      final mod = mods[modid]!;
+      for (final dep in mod.dependencies) {
+        toEnable.add(dep);
+      }
+    }
+    for (final modid in toEnable) {
+      setEnabled(modid, true);
+    }
+    return generateLoadOrder();
+  }
 }
 
 String _expansionNameFromId(String id) {