feat: HAR codegen

lib/codegen/codegen.dart

@@ -4,6 +4,7 @@ import 'dart/pkg_http.dart';
 import 'kotlin/pkg_okhttp.dart';
 import 'python/pkg_http_client.dart';
 import 'python/pkg_requests.dart';
+import 'others/har.dart';
 
 class Codegen {
   String? getCode(
@@ -12,6 +13,8 @@ class Codegen {
     String defaultUriScheme,
   ) {
     switch (codegenLanguage) {
+      case CodegenLanguage.har:
+        return HARCodeGen().getCode(requestModel);
       case CodegenLanguage.dartHttp:
         return DartHttpCodeGen().getCode(requestModel, defaultUriScheme);
       case CodegenLanguage.kotlinOkHttp:

lib/codegen/others/har.dart

@@ -0,0 +1,68 @@
+import 'dart:convert';
+import 'package:apidash/consts.dart';
+import 'package:apidash/utils/utils.dart' show rowsToMap;
+import 'package:apidash/models/models.dart' show RequestModel;
+
+Map<String, dynamic> convertRequestModelToHARJson(RequestModel requestModel) {
+  Map<String, dynamic> json = {};
+  bool hasBody = false;
+
+  json["method"] = requestModel.method.name.toUpperCase();
+  json["url"] = requestModel.url;
+  json["httpVersion"] = "HTTP/1.1";
+  json["queryString"] = [];
+  json["headers"] = [];
+
+  var paramsList = requestModel.requestParams;
+  if (paramsList != null) {
+    var params = rowsToMap(requestModel.requestParams) ?? {};
+    if (params.isNotEmpty) {
+      for (final k in params.keys) {
+        json["queryString"].add({"name": k, "value": params[k]});
+      }
+    }
+  }
+
+  var method = requestModel.method;
+  var requestBody = requestModel.requestBody;
+  if (kMethodsWithBody.contains(method) && requestBody != null) {
+    var contentLength = utf8.encode(requestBody).length;
+    if (contentLength > 0) {
+      hasBody = true;
+      json["postData"] = {};
+      json["postData"]["mimeType"] =
+          kContentTypeMap[requestModel.requestBodyContentType] ?? "";
+      json["postData"]["text"] = requestBody;
+    }
+  }
+
+  var headersList = requestModel.requestHeaders;
+  if (headersList != null || hasBody) {
+    var headers = rowsToMap(requestModel.requestHeaders) ?? {};
+    if (headers.isNotEmpty || hasBody) {
+      if (hasBody) {
+        json["headers"].add({
+          "name": "Content-Type",
+          "value": kContentTypeMap[requestModel.requestBodyContentType] ?? ""
+        });
+      }
+      for (final k in headers.keys) {
+        json["headers"].add({"name": k, "value": headers[k]});
+      }
+    }
+  }
+
+  return json;
+}
+
+class HARCodeGen {
+  String? getCode(RequestModel requestModel) {
+    try {
+      var harString =
+          kEncoder.convert(convertRequestModelToHARJson(requestModel));
+      return harString;
+    } catch (e) {
+      return null;
+    }
+  }
+}

lib/consts.dart

@@ -231,6 +231,7 @@ const kDefaultHttpMethod = HTTPVerb.get;
 const kDefaultContentType = ContentType.json;
 
 enum CodegenLanguage {
+  har("HAR", "json", "json"),
   dartHttp("Dart (http)", "dart", "dart"),
   kotlinOkHttp("Kotlin (okhttp3)", "java", "kt"),
   pythonHttpClient("Python (http.client)", "python", "py"),