Added script based component

lib/models/component.dart

@@ -20,6 +20,8 @@ class ComponentEntry with _$ComponentEntry {
     required bool visualDesigned,
     @JsonKey(defaultValue: [])
     required List<String> dependencies,
+    @JsonKey(defaultValue: false)
+    required bool scriptBased,
   }) = _ComponentEntry;
 
   factory ComponentEntry.fromJson(Map<String, Object?> json) => _$ComponentEntryFromJson(json);

lib/models/component.freezed.dart

@@ -34,6 +34,8 @@ mixin _$ComponentEntry {
   bool get visualDesigned => throw _privateConstructorUsedError;
   @JsonKey(defaultValue: [])
   List<String> get dependencies => throw _privateConstructorUsedError;
+  @JsonKey(defaultValue: false)
+  bool get scriptBased => throw _privateConstructorUsedError;
 
   Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
   @JsonKey(ignore: true)
@@ -55,7 +57,8 @@ abstract class $ComponentEntryCopyWith<$Res> {
       @JsonKey(includeIfNull: false) List<String>? truthTable,
       @JsonKey(includeIfNull: false) List<String>? logicExpression,
       @JsonKey(defaultValue: false) bool visualDesigned,
-      @JsonKey(defaultValue: []) List<String> dependencies});
+      @JsonKey(defaultValue: []) List<String> dependencies,
+      @JsonKey(defaultValue: false) bool scriptBased});
 }
 
 /// @nodoc
@@ -78,6 +81,7 @@ class _$ComponentEntryCopyWithImpl<$Res>
     Object? logicExpression = freezed,
     Object? visualDesigned = freezed,
     Object? dependencies = freezed,
+    Object? scriptBased = freezed,
   }) {
     return _then(_value.copyWith(
       componentId: componentId == freezed
@@ -116,6 +120,10 @@ class _$ComponentEntryCopyWithImpl<$Res>
           ? _value.dependencies
           : dependencies // ignore: cast_nullable_to_non_nullable
               as List<String>,
+      scriptBased: scriptBased == freezed
+          ? _value.scriptBased
+          : scriptBased // ignore: cast_nullable_to_non_nullable
+              as bool,
     ));
   }
 }
@@ -136,7 +144,8 @@ abstract class _$$_ComponentEntryCopyWith<$Res>
       @JsonKey(includeIfNull: false) List<String>? truthTable,
       @JsonKey(includeIfNull: false) List<String>? logicExpression,
       @JsonKey(defaultValue: false) bool visualDesigned,
-      @JsonKey(defaultValue: []) List<String> dependencies});
+      @JsonKey(defaultValue: []) List<String> dependencies,
+      @JsonKey(defaultValue: false) bool scriptBased});
 }
 
 /// @nodoc
@@ -161,6 +170,7 @@ class __$$_ComponentEntryCopyWithImpl<$Res>
     Object? logicExpression = freezed,
     Object? visualDesigned = freezed,
     Object? dependencies = freezed,
+    Object? scriptBased = freezed,
   }) {
     return _then(_$_ComponentEntry(
       componentId: componentId == freezed
@@ -199,6 +209,10 @@ class __$$_ComponentEntryCopyWithImpl<$Res>
           ? _value._dependencies
           : dependencies // ignore: cast_nullable_to_non_nullable
               as List<String>,
+      scriptBased: scriptBased == freezed
+          ? _value.scriptBased
+          : scriptBased // ignore: cast_nullable_to_non_nullable
+              as bool,
     ));
   }
 }
@@ -215,7 +229,8 @@ class _$_ComponentEntry implements _ComponentEntry {
       @JsonKey(includeIfNull: false) final List<String>? truthTable,
       @JsonKey(includeIfNull: false) final List<String>? logicExpression,
       @JsonKey(defaultValue: false) required this.visualDesigned,
-      @JsonKey(defaultValue: []) required final List<String> dependencies})
+      @JsonKey(defaultValue: []) required final List<String> dependencies,
+      @JsonKey(defaultValue: false) required this.scriptBased})
       : _inputs = inputs,
         _outputs = outputs,
         _truthTable = truthTable,
@@ -277,9 +292,13 @@ class _$_ComponentEntry implements _ComponentEntry {
     return EqualUnmodifiableListView(_dependencies);
   }
 
+  @override
+  @JsonKey(defaultValue: false)
+  final bool scriptBased;
+
   @override
   String toString() {
-    return 'ComponentEntry(componentId: $componentId, componentName: $componentName, componentDescription: $componentDescription, inputs: $inputs, outputs: $outputs, truthTable: $truthTable, logicExpression: $logicExpression, visualDesigned: $visualDesigned, dependencies: $dependencies)';
+    return 'ComponentEntry(componentId: $componentId, componentName: $componentName, componentDescription: $componentDescription, inputs: $inputs, outputs: $outputs, truthTable: $truthTable, logicExpression: $logicExpression, visualDesigned: $visualDesigned, dependencies: $dependencies, scriptBased: $scriptBased)';
   }
 
   @override
@@ -302,7 +321,9 @@ class _$_ComponentEntry implements _ComponentEntry {
             const DeepCollectionEquality()
                 .equals(other.visualDesigned, visualDesigned) &&
             const DeepCollectionEquality()
-                .equals(other._dependencies, _dependencies));
+                .equals(other._dependencies, _dependencies) &&
+            const DeepCollectionEquality()
+                .equals(other.scriptBased, scriptBased));
   }
 
   @JsonKey(ignore: true)
@@ -317,7 +338,8 @@ class _$_ComponentEntry implements _ComponentEntry {
       const DeepCollectionEquality().hash(_truthTable),
       const DeepCollectionEquality().hash(_logicExpression),
       const DeepCollectionEquality().hash(visualDesigned),
-      const DeepCollectionEquality().hash(_dependencies));
+      const DeepCollectionEquality().hash(_dependencies),
+      const DeepCollectionEquality().hash(scriptBased));
 
   @JsonKey(ignore: true)
   @override
@@ -332,20 +354,17 @@ class _$_ComponentEntry implements _ComponentEntry {
 
 abstract class _ComponentEntry implements ComponentEntry {
   const factory _ComponentEntry(
-      {required final String componentId,
+          {required final String componentId,
-      required final String componentName,
+          required final String componentName,
-      @JsonKey(includeIfNull: false)
+          @JsonKey(includeIfNull: false) final String? componentDescription,
-          final String? componentDescription,
+          required final List<String> inputs,
-      required final List<String> inputs,
+          required final List<String> outputs,
-      required final List<String> outputs,
+          @JsonKey(includeIfNull: false) final List<String>? truthTable,
-      @JsonKey(includeIfNull: false)
+          @JsonKey(includeIfNull: false) final List<String>? logicExpression,
-          final List<String>? truthTable,
+          @JsonKey(defaultValue: false) required final bool visualDesigned,
-      @JsonKey(includeIfNull: false)
+          @JsonKey(defaultValue: []) required final List<String> dependencies,
-          final List<String>? logicExpression,
+          @JsonKey(defaultValue: false) required final bool scriptBased}) =
-      @JsonKey(defaultValue: false)
+      _$_ComponentEntry;
-          required final bool visualDesigned,
-      @JsonKey(defaultValue: [])
-          required final List<String> dependencies}) = _$_ComponentEntry;
 
   factory _ComponentEntry.fromJson(Map<String, dynamic> json) =
       _$_ComponentEntry.fromJson;
@@ -374,6 +393,9 @@ abstract class _ComponentEntry implements ComponentEntry {
   @JsonKey(defaultValue: [])
   List<String> get dependencies => throw _privateConstructorUsedError;
   @override
+  @JsonKey(defaultValue: false)
+  bool get scriptBased => throw _privateConstructorUsedError;
+  @override
   @JsonKey(ignore: true)
   _$$_ComponentEntryCopyWith<_$_ComponentEntry> get copyWith =>
       throw _privateConstructorUsedError;

lib/models/component.g.dart

@@ -26,6 +26,7 @@ _$_ComponentEntry _$$_ComponentEntryFromJson(Map<String, dynamic> json) =>
               ?.map((e) => e as String)
               .toList() ??
           [],
+      scriptBased: json['scriptBased'] as bool? ?? false,
     );
 
 Map<String, dynamic> _$$_ComponentEntryToJson(_$_ComponentEntry instance) {
@@ -47,5 +48,6 @@ Map<String, dynamic> _$$_ComponentEntryToJson(_$_ComponentEntry instance) {
   writeNotNull('logicExpression', instance.logicExpression);
   val['visualDesigned'] = instance.visualDesigned;
   val['dependencies'] = instance.dependencies;
+  val['scriptBased'] = instance.scriptBased;
   return val;
 }

lib/pages/edit_component.dart

@@ -1,6 +1,8 @@
+import 'dart:io';
 import 'dart:math';
 
 import 'package:collection/collection.dart';
+import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_hooks/flutter_hooks.dart';
 import 'package:logic_circuits_simulator/components/logic_expression_field.dart';
@@ -14,10 +16,13 @@ import 'package:logic_circuits_simulator/pages_arguments/edit_component.dart';
 import 'package:logic_circuits_simulator/state/component.dart';
 import 'package:logic_circuits_simulator/state/project.dart';
 import 'package:logic_circuits_simulator/state/projects.dart';
+import 'package:logic_circuits_simulator/state/script.dart';
 import 'package:logic_circuits_simulator/utils/iterable_extension.dart';
 import 'package:logic_circuits_simulator/utils/logic_expressions.dart';
 import 'package:logic_circuits_simulator/utils/logic_operators.dart';
 import 'package:logic_circuits_simulator/utils/provider_hook.dart';
+import 'package:path/path.dart' as path;
+import 'package:path_provider/path_provider.dart';
 import 'package:provider/provider.dart';
 import 'package:tuple/tuple.dart';
 
@@ -44,6 +49,7 @@ class EditComponentPage extends HookWidget {
         : List<LogicExpression?>.generate(logicExpressions.value!.length, (index) => null),
     );
     final visualDesigned = useState(ce().visualDesigned);
+    final scriptBased = useState(ce().scriptBased);
     final inputs = useState(ce().inputs.toList());
     final outputs = useState(ce().outputs.toList());
     final componentNameEditingController = useTextEditingController(text: ce().componentName);
@@ -64,7 +70,7 @@ class EditComponentPage extends HookWidget {
           // Don't allow saving empty outputs
           return false;
         }
-        if (truthTable.value == null && logicExpressions.value == null && !visualDesigned.value) {
+        if (truthTable.value == null && logicExpressions.value == null && !visualDesigned.value && !scriptBased.value) {
           // Don't allow saving components without functionality
           return false;
         }
@@ -91,6 +97,9 @@ class EditComponentPage extends HookWidget {
         if (visualDesigned.value != ce().visualDesigned) {
           return true;
         }
+        if (scriptBased.value != ce().scriptBased) {
+          return true;
+        }
         return false;
       },
       [
@@ -107,6 +116,8 @@ class EditComponentPage extends HookWidget {
         visualDesigned.value,
         ce().visualDesigned,
         logicExpressionsParsed.value,
+        ce().scriptBased,
+        scriptBased.value,
       ],
     );
 
@@ -413,7 +424,7 @@ class EditComponentPage extends HookWidget {
                   textAlign: TextAlign.center,
                 ),
               )
-            else if (truthTable.value == null && logicExpressions.value == null && !visualDesigned.value) ...[
+            else if (truthTable.value == null && logicExpressions.value == null && !visualDesigned.value && !scriptBased.value) ...[
               SliverToBoxAdapter(
                 child: Column(
                   children: [
@@ -462,11 +473,13 @@ class EditComponentPage extends HookWidget {
                         child: const Text('Visual Designer'),
                       ),
                     ),
-                    const Padding(
+                    Padding(
-                      padding: EdgeInsets.all(8.0),
+                      padding: const EdgeInsets.all(8.0),
                       child: OutlinedButton(
-                        onPressed: null, 
+                        onPressed: () async {
-                        child: Text('Script'),
+                          scriptBased.value = true;
+                        }, 
+                        child: const Text('Script'),
                       ),
                     ),
                   ],
@@ -579,7 +592,7 @@ class EditComponentPage extends HookWidget {
                           try {
                             await Provider.of<ComponentState>(context, listen: false).setCurrentComponent(
                               project: projectState.currentProject!, 
-                              component: component,
+                              component: ce(),
                               onDependencyNeeded: (String projectId, String componentId) async {
                                 if (projectId == 'self') {
                                   final maybeComponent = projectState.index.components.where((c) => c.componentId == componentId).firstOrNull;
@@ -622,7 +635,95 @@ class EditComponentPage extends HookWidget {
                     ),
                   ],
                 ),
-              )
+              ),
+            ],
+            if (scriptBased.value) ...[
+              SliverToBoxAdapter(
+                child: Column(
+                  children: [
+                    Text(
+                      "Script Component",
+                      style: Theme.of(context).textTheme.headline4,
+                      textAlign: TextAlign.center,
+                    ),
+                    HookBuilder(
+                      builder: (context) {
+                        final stateListenable = useState(
+                          ScriptState(
+                            project: projectState.currentProject!, 
+                            component: ce(),
+                          ),
+                        );
+                        final scriptState = useListenable(stateListenable.value);
+
+                        if (!scriptState.loaded) {
+                          return const Padding(
+                            padding: EdgeInsets.all(8.0),
+                            child: CircularProgressIndicator(),
+                          );
+                        }
+
+                        return Column(
+                          mainAxisSize: MainAxisSize.min,
+                          crossAxisAlignment: CrossAxisAlignment.stretch,
+                          children: [
+                            Center(
+                              child: Padding(
+                                padding: const EdgeInsets.all(8.0),
+                                child: ElevatedButton(
+                                  onPressed: () async {
+                                    final scaffoldMessenger = ScaffoldMessenger.of(context);
+                                    final picked = await FilePicker.platform.pickFiles(
+                                      dialogTitle: 'Select Script',
+                                      // allowedExtensions: ['ht', 'txt'],
+                                      allowMultiple: false,
+                                      type: FileType.any,
+                                    );
+                                    if (picked == null) {
+                                      return;
+                                    }
+                                    final file = File(picked.files.first.path!);
+                                    if (!await file.exists()) {
+                                      scaffoldMessenger.showSnackBar(
+                                        const SnackBar(
+                                          content: Text('The selected file does not exist'),
+                                        ),
+                                      );
+                                      return;
+                                    }
+                                    await scriptState.setScriptContents(await file.readAsString());
+                                  }, 
+                                  child: Text(scriptState.scriptExists ? 'Replace Script' : 'Select Script'),
+                                ),
+                              ),
+                            ),
+                            if (scriptState.scriptContent != null)
+                              Padding(
+                                padding: const EdgeInsets.all(8.0),
+                                child: Text(
+                                  scriptState.scriptContent!,
+                                  softWrap: true,
+                                  style: TextStyle(
+                                    inherit: true,
+                                    fontFamily: 'JetBrains Mono',
+                                    fontFamilyFallback: [
+                                      'JetBrains Mono',
+                                      'Ubuntu Mono',
+                                      'Menlo',
+                                      'Cascadia Code',
+                                      'Courier New',
+                                      'Courier',
+                                    ],
+                                  ),
+                                ),
+                              ),
+                          ],
+                        );
+                      },
+                    ),
+                  ],
+                ),
+              ),
             ],
             const SliverPadding(
               padding: EdgeInsets.only(bottom: 56 + 16 + 16),
@@ -640,9 +741,9 @@ class EditComponentPage extends HookWidget {
               truthTable: truthTable.value,
               logicExpression: logicExpressions.value,
               visualDesigned: visualDesigned.value,
+              scriptBased: scriptBased.value,
             ));
             anySave.value = true;
-            // TODO: Implement saving
           },
           tooltip: 'Save Component',
           child: const Icon(Icons.save),

lib/state/project.dart

@@ -77,6 +77,7 @@ class ProjectState extends ChangeNotifier {
       outputs: [],
       visualDesigned: false,
       dependencies: [],
+      scriptBased: false,
     );
     await _updateIndex(index.copyWith(components: index.components + [newComponent]));
     return newComponent;

lib/state/script.dart

@@ -0,0 +1,58 @@
+import 'dart:io';
+
+import 'package:flutter/foundation.dart';
+import 'package:logic_circuits_simulator/models.dart';
+import 'package:path/path.dart' as path;
+import 'package:path_provider/path_provider.dart';
+
+class ScriptState extends ChangeNotifier {
+  bool? _scriptExists;
+  String? _scriptContent;
+
+  bool get loaded => _scriptExists != null;
+  bool get scriptExists => _scriptExists ?? false;
+  String? get scriptContent => _scriptContent;
+
+  final ProjectEntry project;
+  final ComponentEntry component;
+
+  ScriptState({required this.project, required this.component, bool invokeInit = true}) {
+    if (invokeInit) {
+      init();
+    }
+  }
+
+  Future<File> _getScriptFile() async {
+    final appDir = await getApplicationDocumentsDirectory();
+    final componentDir = Directory(path.join(appDir.path, 'LogicCircuitsSimulator', 'projects', project.projectId, 'components', component.componentId));
+    if (!await componentDir.exists()) {
+      await componentDir.create(recursive: true);
+    }
+    return File(path.join(componentDir.path, 'script.ht'));
+  }
+
+  Future<void> init() async {
+    final scriptFile = await _getScriptFile();
+    _scriptExists = await scriptFile.exists();
+    if (scriptExists) {
+      _scriptContent = await scriptFile.readAsString();
+    }
+    notifyListeners();
+  }
+
+  Future<void> setScriptContents(String newContents) async {
+    final scriptFile = await _getScriptFile();
+    await scriptFile.writeAsString(newContents);
+    _scriptContent = newContents;
+    _scriptExists = true;
+    notifyListeners();
+  }
+
+  Future<void> deleteScript() async {
+    final scriptFile = await _getScriptFile();
+    await scriptFile.delete();
+    _scriptContent = null;
+    _scriptExists = false;
+    notifyListeners();
+  }
+}

lib/utils/simulation.dart

@@ -1,7 +1,9 @@
 import 'package:collection/collection.dart';
 import 'package:flutter/foundation.dart';
+import 'package:hetu_script/hetu_script.dart';
 import 'package:logic_circuits_simulator/models.dart';
 import 'package:logic_circuits_simulator/state/component.dart';
+import 'package:logic_circuits_simulator/state/script.dart';
 import 'package:logic_circuits_simulator/utils/iterable_extension.dart';
 import 'package:logic_circuits_simulator/utils/logic_expressions.dart';
 
@@ -55,6 +57,23 @@ class SimulatedComponent {
         },
       );
       return {for (final it in results) it[0] as String: it[1] as bool};
+    } else if (component.scriptBased) {
+      final state = ScriptState(
+        component: component,
+        project: project,
+        invokeInit: false,
+      );
+      await state.init();
+      if (!state.scriptExists) {
+        throw Exception('Script for component ${project.projectId}/${component.componentId} does not exist');
+      }
+      final hetu = Hetu();
+      hetu.init();
+      final result = hetu.eval(state.scriptContent!, invokeFunc: 'simulate', positionalArgs: [inputs]);
+      return {
+        for (final output in component.outputs)
+          output: result[output]
+      };
     } else if (state == null) {
       throw Exception('Cannot simulate designed component without its state');
     } else {