move ContactInfo to its own file

@@ -3,6 +3,7 @@ Improvements:
 * The `type` of an `Email` is now non-null.
 * The `phoneNumber` of an `SMS` is now non-null.
 * The `latitude` and `longitude` of a `GeoPoint` are now non-null.
+* The `phones` and `urls` of `ContactInfo` are now non-null.
 
 ## 3.5.0
 New Features:

@@ -15,6 +15,7 @@ export 'src/mobile_scanner_exception.dart';
 export 'src/objects/barcode.dart';
 export 'src/objects/barcode_capture.dart';
 export 'src/objects/calendar_event.dart';
+export 'src/objects/contact_info.dart';
 export 'src/objects/driver_license.dart';
 export 'src/objects/email.dart';
 export 'src/objects/geo_point.dart';

@@ -7,6 +7,7 @@ import 'package:mobile_scanner/src/enums/barcode_format.dart';
 import 'package:mobile_scanner/src/enums/barcode_type.dart';
 import 'package:mobile_scanner/src/enums/phone_type.dart';
 import 'package:mobile_scanner/src/objects/calendar_event.dart';
+import 'package:mobile_scanner/src/objects/contact_info.dart';
 import 'package:mobile_scanner/src/objects/driver_license.dart';
 import 'package:mobile_scanner/src/objects/email.dart';
 import 'package:mobile_scanner/src/objects/geo_point.dart';
@@ -121,62 +122,6 @@ class Barcode {
         wifi = toWiFi(data['wifi'] as Map?);
 }
 
-/// A person's or organization's business card. For example a VCARD.
-class ContactInfo {
-  /// Gets contact person's addresses.
-  ///
-  /// Returns an empty list if nothing found.
-  final List<Address> addresses;
-
-  /// Gets contact person's emails.
-  ///
-  /// Returns an empty list if nothing found.
-  final List<Email> emails;
-
-  /// Gets contact person's name.
-  ///
-  /// Returns null if not available.
-  final PersonName? name;
-
-  /// Gets contact person's organization.
-  ///
-  /// Returns null if not available.
-  final String? organization;
-
-  /// Gets contact person's phones.
-  ///
-  /// Returns an empty list if nothing found.
-  final List<Phone>? phones;
-
-  /// Gets contact person's title.
-  ///
-  /// Returns null if not available.
-  final String? title;
-
-  /// Gets contact person's urls.
-  ///
-  /// Returns an empty list if nothing found.
-  final List<String>? urls;
-
-  /// Create a [ContactInfo] from native data.
-  ContactInfo.fromNative(Map data)
-      : addresses = List.unmodifiable(
-          (data['addresses'] as List? ?? [])
-              .cast<Map>()
-              .map(Address.fromNative),
-        ),
-        emails = List.unmodifiable(
-          (data['emails'] as List? ?? []).cast<Map>().map(Email.fromNative),
-        ),
-        name = toName(data['name'] as Map?),
-        organization = data['organization'] as String?,
-        phones = List.unmodifiable(
-          (data['phones'] as List? ?? []).cast<Map>().map(Phone.fromNative),
-        ),
-        title = data['title'] as String?,
-        urls = List.unmodifiable((data['urls'] as List? ?? []).cast<String>());
-}
-
 /// An address.
 class Address {
   /// Gets formatted address, multiple lines when appropriate. This field always contains at least one line.

+import 'package:mobile_scanner/src/objects/barcode.dart';
+import 'package:mobile_scanner/src/objects/email.dart';
+
+/// A person's or organization's business card.
+/// For example a VCARD.
+class ContactInfo {
+  /// Create a new [ContactInfo] instance.
+  const ContactInfo({
+    this.addresses = const <Address>[],
+    this.emails = const <Email>[],
+    this.name,
+    this.organization,
+    this.phones = const <Phone>[],
+    this.title,
+    this.urls = const <String>[],
+  });
+
+  /// Create a new [ContactInfo] instance from a map.
+  factory ContactInfo.fromNative(Map<Object?, Object?> data) {
+    final List<Object?>? addresses = data['addresses'] as List<Object?>?;
+    final List<Object?>? emails = data['emails'] as List<Object?>?;
+    final List<Object?>? phones = data['phones'] as List<Object?>?;
+    final List<Object?>? urls = data['urls'] as List<Object?>?;
+    final Map<Object?, Object?>? name = data['name'] as Map<Object?, Object?>?;
+
+    return ContactInfo(
+      addresses: addresses == null
+          ? const <Address>[]
+          : List.unmodifiable(
+              addresses.cast<Map<Object?, Object?>>().map(Address.fromNative),
+            ),
+      emails: emails == null
+          ? const <Email>[]
+          : List.unmodifiable(
+              emails.cast<Map<Object?, Object?>>().map(Email.fromNative),
+            ),
+      name: name == null ? null : PersonName.fromNative(name),
+      organization: data['organization'] as String?,
+      phones: phones == null
+          ? const <Phone>[]
+          : List.unmodifiable(
+              phones.cast<Map<Object?, Object?>>().map(Phone.fromNative),
+            ),
+      title: data['title'] as String?,
+      urls: urls == null
+          ? const <String>[]
+          : List.unmodifiable(urls.cast<String>()),
+    );
+  }
+
+  /// The list of addresses for the person or organisation.
+  final List<Address> addresses;
+
+  /// The list of email addresses for the person or organisation.
+  final List<Email> emails;
+
+  /// The name of the contact person.
+  final PersonName? name;
+
+  /// The name of the organization.
+  final String? organization;
+
+  /// The available phone numbers for the contact person or organisation.
+  final List<Phone> phones;
+
+  /// The contact person's title.
+  final String? title;
+
+  /// The urls associated with the contact person or organisation.
+  final List<String> urls;
+}