feat: add support for pre-request scripts

Introduces `preRequestScript` and `postRequestScript` fields to the request model to store user-defined scripts.

Implements a service using `flutter_js` to execute JavaScript pre-request scripts before a request is sent.
The script can access and modify request data (like headers, body, URL) and environment variables.

Adds bridging to forward JavaScript `console.log`, `console.warn`, and `console.error` calls to the Dart console for easier debugging

lib/models/request_model.dart

@@ -22,6 +22,8 @@ class RequestModel with _$RequestModel {
     HttpResponseModel? httpResponseModel,
     @JsonKey(includeToJson: false) @Default(false) bool isWorking,
     @JsonKey(includeToJson: false) DateTime? sendingTime,
+    @Default("") String preRequestScript,
+    @Default("") String postRequestScript,
   }) = _RequestModel;
 
   factory RequestModel.fromJson(Map<String, Object?> json) =>

lib/models/request_model.freezed.dart

@@ -35,6 +35,8 @@ mixin _$RequestModel {
   bool get isWorking => throw _privateConstructorUsedError;
   @JsonKey(includeToJson: false)
   DateTime? get sendingTime => throw _privateConstructorUsedError;
+  String get preRequestScript => throw _privateConstructorUsedError;
+  String get postRequestScript => throw _privateConstructorUsedError;
 
   /// Serializes this RequestModel to a JSON map.
   Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
@@ -63,7 +65,9 @@ abstract class $RequestModelCopyWith<$Res> {
       String? message,
       HttpResponseModel? httpResponseModel,
       @JsonKey(includeToJson: false) bool isWorking,
-      @JsonKey(includeToJson: false) DateTime? sendingTime});
+      @JsonKey(includeToJson: false) DateTime? sendingTime,
+      String preRequestScript,
+      String postRequestScript});
 
   $HttpRequestModelCopyWith<$Res>? get httpRequestModel;
   $HttpResponseModelCopyWith<$Res>? get httpResponseModel;
@@ -95,6 +99,8 @@ class _$RequestModelCopyWithImpl<$Res, $Val extends RequestModel>
     Object? httpResponseModel = freezed,
     Object? isWorking = null,
     Object? sendingTime = freezed,
+    Object? preRequestScript = null,
+    Object? postRequestScript = null,
   }) {
     return _then(_value.copyWith(
       id: null == id
@@ -141,6 +147,14 @@ class _$RequestModelCopyWithImpl<$Res, $Val extends RequestModel>
           ? _value.sendingTime
           : sendingTime // ignore: cast_nullable_to_non_nullable
               as DateTime?,
+      preRequestScript: null == preRequestScript
+          ? _value.preRequestScript
+          : preRequestScript // ignore: cast_nullable_to_non_nullable
+              as String,
+      postRequestScript: null == postRequestScript
+          ? _value.postRequestScript
+          : postRequestScript // ignore: cast_nullable_to_non_nullable
+              as String,
     ) as $Val);
   }
 
@@ -192,7 +206,9 @@ abstract class _$$RequestModelImplCopyWith<$Res>
       String? message,
       HttpResponseModel? httpResponseModel,
       @JsonKey(includeToJson: false) bool isWorking,
-      @JsonKey(includeToJson: false) DateTime? sendingTime});
+      @JsonKey(includeToJson: false) DateTime? sendingTime,
+      String preRequestScript,
+      String postRequestScript});
 
   @override
   $HttpRequestModelCopyWith<$Res>? get httpRequestModel;
@@ -224,6 +240,8 @@ class __$$RequestModelImplCopyWithImpl<$Res>
     Object? httpResponseModel = freezed,
     Object? isWorking = null,
     Object? sendingTime = freezed,
+    Object? preRequestScript = null,
+    Object? postRequestScript = null,
   }) {
     return _then(_$RequestModelImpl(
       id: null == id
@@ -269,6 +287,14 @@ class __$$RequestModelImplCopyWithImpl<$Res>
           ? _value.sendingTime
           : sendingTime // ignore: cast_nullable_to_non_nullable
               as DateTime?,
+      preRequestScript: null == preRequestScript
+          ? _value.preRequestScript
+          : preRequestScript // ignore: cast_nullable_to_non_nullable
+              as String,
+      postRequestScript: null == postRequestScript
+          ? _value.postRequestScript
+          : postRequestScript // ignore: cast_nullable_to_non_nullable
+              as String,
     ));
   }
 }
@@ -288,7 +314,9 @@ class _$RequestModelImpl implements _RequestModel {
       this.message,
       this.httpResponseModel,
       @JsonKey(includeToJson: false) this.isWorking = false,
-      @JsonKey(includeToJson: false) this.sendingTime});
+      @JsonKey(includeToJson: false) this.sendingTime,
+      this.preRequestScript = "",
+      this.postRequestScript = ""});
 
   factory _$RequestModelImpl.fromJson(Map<String, dynamic> json) =>
       _$$RequestModelImplFromJson(json);
@@ -321,10 +349,16 @@ class _$RequestModelImpl implements _RequestModel {
   @override
   @JsonKey(includeToJson: false)
   final DateTime? sendingTime;
+  @override
+  @JsonKey()
+  final String preRequestScript;
+  @override
+  @JsonKey()
+  final String postRequestScript;
 
   @override
   String toString() {
-    return 'RequestModel(id: $id, apiType: $apiType, name: $name, description: $description, requestTabIndex: $requestTabIndex, httpRequestModel: $httpRequestModel, responseStatus: $responseStatus, message: $message, httpResponseModel: $httpResponseModel, isWorking: $isWorking, sendingTime: $sendingTime)';
+    return 'RequestModel(id: $id, apiType: $apiType, name: $name, description: $description, requestTabIndex: $requestTabIndex, httpRequestModel: $httpRequestModel, responseStatus: $responseStatus, message: $message, httpResponseModel: $httpResponseModel, isWorking: $isWorking, sendingTime: $sendingTime, preRequestScript: $preRequestScript, postRequestScript: $postRequestScript)';
   }
 
   @override
@@ -349,7 +383,11 @@ class _$RequestModelImpl implements _RequestModel {
             (identical(other.isWorking, isWorking) ||
                 other.isWorking == isWorking) &&
             (identical(other.sendingTime, sendingTime) ||
-                other.sendingTime == sendingTime));
+                other.sendingTime == sendingTime) &&
+            (identical(other.preRequestScript, preRequestScript) ||
+                other.preRequestScript == preRequestScript) &&
+            (identical(other.postRequestScript, postRequestScript) ||
+                other.postRequestScript == postRequestScript));
   }
 
   @JsonKey(includeFromJson: false, includeToJson: false)
@@ -366,7 +404,9 @@ class _$RequestModelImpl implements _RequestModel {
       message,
       httpResponseModel,
       isWorking,
-      sendingTime);
+      sendingTime,
+      preRequestScript,
+      postRequestScript);
 
   /// Create a copy of RequestModel
   /// with the given fields replaced by the non-null parameter values.
@@ -386,18 +426,19 @@ class _$RequestModelImpl implements _RequestModel {
 
 abstract class _RequestModel implements RequestModel {
   const factory _RequestModel(
-          {required final String id,
+      {required final String id,
-          final APIType apiType,
+      final APIType apiType,
-          final String name,
+      final String name,
-          final String description,
+      final String description,
-          @JsonKey(includeToJson: false) final dynamic requestTabIndex,
+      @JsonKey(includeToJson: false) final dynamic requestTabIndex,
-          final HttpRequestModel? httpRequestModel,
+      final HttpRequestModel? httpRequestModel,
-          final int? responseStatus,
+      final int? responseStatus,
-          final String? message,
+      final String? message,
-          final HttpResponseModel? httpResponseModel,
+      final HttpResponseModel? httpResponseModel,
-          @JsonKey(includeToJson: false) final bool isWorking,
+      @JsonKey(includeToJson: false) final bool isWorking,
-          @JsonKey(includeToJson: false) final DateTime? sendingTime}) =
+      @JsonKey(includeToJson: false) final DateTime? sendingTime,
-      _$RequestModelImpl;
+      final String preRequestScript,
+      final String postRequestScript}) = _$RequestModelImpl;
 
   factory _RequestModel.fromJson(Map<String, dynamic> json) =
       _$RequestModelImpl.fromJson;
@@ -427,6 +468,10 @@ abstract class _RequestModel implements RequestModel {
   @override
   @JsonKey(includeToJson: false)
   DateTime? get sendingTime;
+  @override
+  String get preRequestScript;
+  @override
+  String get postRequestScript;
 
   /// Create a copy of RequestModel
   /// with the given fields replaced by the non-null parameter values.

lib/models/request_model.g.dart

@@ -27,6 +27,8 @@ _$RequestModelImpl _$$RequestModelImplFromJson(Map json) => _$RequestModelImpl(
       sendingTime: json['sendingTime'] == null
           ? null
           : DateTime.parse(json['sendingTime'] as String),
+      preRequestScript: json['preRequestScript'] as String? ?? "",
+      postRequestScript: json['postRequestScript'] as String? ?? "",
     );
 
 Map<String, dynamic> _$$RequestModelImplToJson(_$RequestModelImpl instance) =>
@@ -39,6 +41,8 @@ Map<String, dynamic> _$$RequestModelImplToJson(_$RequestModelImpl instance) =>
       'responseStatus': instance.responseStatus,
       'message': instance.message,
       'httpResponseModel': instance.httpResponseModel?.toJson(),
+      'preRequestScript': instance.preRequestScript,
+      'postRequestScript': instance.postRequestScript,
     };
 
 const _$APITypeEnumMap = {

lib/services/flutter_js_service.dart

@@ -1,5 +1,10 @@
+// ignore_for_file: avoid_print
+
+import 'dart:convert';
 import 'dart:developer';
 
+import 'package:apidash/models/request_model.dart';
+import 'package:apidash_core/models/http_request_model.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_js/flutter_js.dart';
 
@@ -21,3 +26,149 @@ void evaluate(String code) {
     log('ERROR: ${e.details}');
   }
 }
+
+// TODO: These log statements can be printed in a custom api dash terminal.
+void setupJsBridge() {
+  jsRuntime.onMessage('consoleLog', (args) {
+    try {
+      final decodedArgs = jsonDecode(args as String);
+      if (decodedArgs is List) {
+        print('[JS LOG]: ${decodedArgs.map((e) => e.toString()).join(' ')}');
+      } else {
+        print('[JS LOG]: $decodedArgs');
+      }
+    } catch (e) {
+      print('[JS LOG ERROR decoding]: $args, Error: $e');
+    }
+  });
+
+  jsRuntime.onMessage('consoleWarn', (args) {
+    try {
+      final decodedArgs = jsonDecode(args as String);
+      if (decodedArgs is List) {
+        print('[JS WARN]: ${decodedArgs.map((e) => e.toString()).join(' ')}');
+      } else {
+        print('[JS WARN]: $decodedArgs');
+      }
+    } catch (e) {
+      print('[JS WARN ERROR decoding]: $args, Error: $e');
+    }
+  });
+
+  jsRuntime.onMessage('consoleError', (args) {
+    try {
+      final decodedArgs = jsonDecode(args as String);
+      if (decodedArgs is List) {
+        print('[JS ERROR]: ${decodedArgs.map((e) => e.toString()).join(' ')}');
+      } else {
+        print('[JS ERROR]: $decodedArgs');
+      }
+    } catch (e) {
+      print('[JS ERROR ERROR decoding]: $args, Error: $e');
+    }
+  });
+
+  jsRuntime.onMessage('fatalError', (args) {
+    try {
+      final errorDetails = jsonDecode(args as String);
+      print('[JS FATAL ERROR]: ${errorDetails['message']}');
+      if (errorDetails['error']) print('  Error: ${errorDetails['error']}');
+      if (errorDetails['stack']) print('  Stack: ${errorDetails['stack']}');
+    } catch (e) {
+      print('[JS FATAL ERROR decoding error]: $args, Error: $e');
+    }
+  });
+
+  //TODO: Add handlers for 'testResult'
+}
+
+Future<
+    ({
+      HttpRequestModel updatedRequest,
+      Map<String, dynamic> updatedEnvironment
+    })> executePreRequestScript({
+  required RequestModel currentRequestModel,
+  required Map<String, dynamic> activeEnvironment,
+  required String setupScript,
+}) async {
+  if (currentRequestModel.preRequestScript.trim().isEmpty) {
+    // No script, return original data
+    // return (
+    //   updatedRequest: currentRequestModel.httpRequestModel,
+    //   updatedEnvironment: activeEnvironment
+    // );
+  }
+
+  final httpRequest = currentRequestModel.httpRequestModel;
+  final userScript = currentRequestModel.preRequestScript;
+
+  // Prepare Data
+  final requestJson = jsonEncode(httpRequest?.toJson());
+  final environmentJson = jsonEncode(activeEnvironment);
+
+  // Inject data as JS variables
+  // Escape strings properly if embedding directly
+  final dataInjection = """
+  const injectedRequestJson = ${jsEscapeString(requestJson)};
+  const injectedEnvironmentJson = ${jsEscapeString(environmentJson)};
+  const injectedResponseJson = null; // Not needed for pre-request
+  """;
+
+  // Concatenate & Add Return
+  final fullScript = """
+  $dataInjection
+  $setupScript
+  // --- User Script ---
+  $userScript
+  // --- Return Result ---
+  JSON.stringify({ request: request, environment: environment });
+  """;
+  // TODO: Do something better to avoid null check here.
+  HttpRequestModel resultingRequest = httpRequest!;
+  Map<String, dynamic> resultingEnvironment = Map.from(activeEnvironment);
+
+  try {
+    // Execute
+    final JsEvalResult result = await jsRuntime.evaluateAsync(fullScript);
+
+    // Process Results
+    if (result.isError) {
+      print("Pre-request script execution error: ${result.stringResult}");
+      // Handle error - maybe show in UI, keep original request/env
+    } else if (result.stringResult.isNotEmpty) {
+      final resultMap = jsonDecode(result.stringResult);
+      if (resultMap is Map<String, dynamic>) {
+        // Deserialize Request
+        if (resultMap.containsKey('request') && resultMap['request'] is Map) {
+          try {
+            resultingRequest = HttpRequestModel.fromJson(
+                Map<String, Object?>.from(resultMap['request']));
+          } catch (e) {
+            print("Error deserializing modified request from script: $e");
+            //TODO: Handle error - maybe keep original request?
+          }
+        }
+        // Get Environment Modifications
+        if (resultMap.containsKey('environment') &&
+            resultMap['environment'] is Map) {
+          resultingEnvironment =
+              Map<String, dynamic>.from(resultMap['environment']);
+        }
+      }
+    }
+  } catch (e) {
+    print("Dart-level error during pre-request script execution: $e");
+    // Handle Dart-level errors (e.g., JS runtime issues)
+  }
+
+  return (
+    updatedRequest: resultingRequest,
+    updatedEnvironment: resultingEnvironment
+  );
+}
+
+// Helper to properly escape strings for JS embedding
+String jsEscapeString(String s) {
+  return jsonEncode(
+      s); // jsonEncode handles escaping correctly for JS string literals
+}