lib code

Author: Sergey Khomushin

lib/api/send_json.dart

@@ -0,0 +1,17 @@
+import 'package:http/http.dart' as http;
+
+Future<String> sendJSON(Uri uri, String data) async {
+  var response = await http.post(
+    uri,
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: data,
+  );
+
+  if (response.statusCode == 200) {
+    return response.body;
+  } else {
+    throw response.body;
+  }
+}

lib/emailjs.dart

@@ -0,0 +1,40 @@
+library emailjs;
+
+import 'dart:convert';
+
+import 'package:emailjs/utils/validate_params.dart';
+import 'package:emailjs/api/send_json.dart';
+
+class EmailJS {
+  static String _publicKey = '';
+  static String _origin = 'api.emailjs.com';
+
+  static void init(String publicKey, [String? origin]) {
+    EmailJS._publicKey = publicKey;
+    EmailJS._origin = origin ?? 'api.emailjs.com';
+  }
+
+  static Future<String> send(
+    String serviceID,
+    String templateID, [
+    Map<String, dynamic>? templatePrams,
+    String? publicKey,
+  ]) async {
+    final pubKey = publicKey ?? EmailJS._publicKey;
+
+    validateParams(pubKey, serviceID, templateID);
+
+    final Map<String, dynamic> params = {
+      'lib_version': '0.0.1',
+      'user_id': pubKey,
+      'service_id': serviceID,
+      'template_id': templateID,
+      'template_params': templatePrams,
+    };
+
+    return await sendJSON(
+      Uri.https(EmailJS._origin, 'api/v1.0/email/send'),
+      json.encode(params),
+    );
+  }
+}

lib/utils/validate_params.dart

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+bool validateParams(
+  String publicKey,
+  String serviceID,
+  String templateID,
+) {
+  if (publicKey.isEmpty) {
+    throw 'The public key is required. Visit https://dashboard.emailjs.com/admin/account';
+  }
+
+  if (serviceID.isEmpty) {
+    throw 'The service ID is required. Visit https://dashboard.emailjs.com/admin';
+  }
+
+  if (templateID.isEmpty) {
+    throw 'The template ID is required. Visit https://dashboard.emailjs.com/admin/templates';
+  }
+
+  return true;
+}