dynamite: Support minLength and maxLength

packages/dynamite/lib/src/models/schema.dart

@@ -24,6 +24,8 @@ class Schema {
     this.contentSchema,
     this.discriminator,
     this.pattern,
+    this.minLength,
+    this.maxLength,
   });
 
   factory Schema.fromJson(final Map<String, dynamic> json) => _$SchemaFromJson(json);
@@ -73,6 +75,10 @@ class Schema {
 
   final String? pattern;
 
+  final int? minLength;
+
+  final int? maxLength;
+
   bool get isContentString => type == 'string' && (contentMediaType?.isNotEmpty ?? false) && contentSchema != null;
 }
 

packages/dynamite/lib/src/models/schema.g.dart

@@ -27,7 +27,9 @@ Schema _$SchemaFromJson(Map<String, dynamic> json) {
       'contentMediaType',
       'contentSchema',
       'discriminator',
-      'pattern'
+      'pattern',
+      'minLength',
+      'maxLength'
     ],
   );
   return Schema(
@@ -53,6 +55,8 @@ Schema _$SchemaFromJson(Map<String, dynamic> json) {
     discriminator:
         json['discriminator'] == null ? null : Discriminator.fromJson(json['discriminator'] as Map<String, dynamic>),
     pattern: json['pattern'] as String?,
+    minLength: json['minLength'] as int?,
+    maxLength: json['maxLength'] as int?,
   );
 }
 
@@ -83,5 +87,7 @@ Map<String, dynamic> _$SchemaToJson(Schema instance) {
   writeNotNull('contentSchema', instance.contentSchema?.toJson());
   writeNotNull('discriminator', instance.discriminator?.toJson());
   writeNotNull('pattern', instance.pattern);
+  writeNotNull('minLength', instance.minLength);
+  writeNotNull('maxLength', instance.maxLength);
   return val;
 }

packages/dynamite/lib/src/openapi_builder.dart

@@ -582,12 +582,28 @@ class OpenAPIBuilder implements Builder {
                                 parameter.schema!,
                               );
 
-                              if (result.name == 'String' && parameter.schema?.pattern != null) {
-                                code.write('''
-                                if (!RegExp(r'${parameter.schema!.pattern!}').hasMatch(${_toDartName(parameter.name)})) {
-                                  throw Exception('Invalid value "\$${_toDartName(parameter.name)}" for parameter "${_toDartName(parameter.name)}" with pattern "' r'${parameter.schema!.pattern!}"'); // coverage:ignore-line
+                              if (result.name == 'String') {
+                                if (parameter.schema?.pattern != null) {
+                                  code.write('''
+                                  if (!RegExp(r'${parameter.schema!.pattern!}').hasMatch(${_toDartName(parameter.name)})) {
+                                    throw Exception('Invalid value "\$${_toDartName(parameter.name)}" for parameter "${_toDartName(parameter.name)}" with pattern "' r'${parameter.schema!.pattern!}"'); // coverage:ignore-line
+                                  }
+                                  ''');
+                                }
+                                if (parameter.schema?.minLength != null) {
+                                  code.write('''
+                                  if (${_toDartName(parameter.name)}.length < ${parameter.schema!.minLength!}) {
+                                    throw Exception('Parameter "${_toDartName(parameter.name)}" has to be at least ${parameter.schema!.minLength!} characters long'); // coverage:ignore-line
+                                  }
+                                  ''');
+                                }
+                                if (parameter.schema?.maxLength != null) {
+                                  code.write('''
+                                  if (${_toDartName(parameter.name)}.length > ${parameter.schema!.maxLength!}) {
+                                    throw Exception('Parameter "${_toDartName(parameter.name)}" has to be at most ${parameter.schema!.maxLength!} characters long'); // coverage:ignore-line
+                                  }
+                                  ''');
                                 }
-                                ''');
                               }
 
                               final defaultValueCode = parameter.schema?.default_ != null