feat: add CompositeEmailService

Author: Kattsyn

rentplace/src/main/java/kattsyn/dev/rentplace/services/impl/CompositeEmailService.java

@@ -0,0 +1,38 @@
+package kattsyn.dev.rentplace.services.impl;
+
+import kattsyn.dev.rentplace.configs.EmailRetryProperties;
+import kattsyn.dev.rentplace.exceptions.EmailException;
+import kattsyn.dev.rentplace.exceptions.EmailServiceUnavailableException;
+import kattsyn.dev.rentplace.services.EmailService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+@Slf4j
+@Primary
+@EnableConfigurationProperties(EmailRetryProperties.class)
+public class CompositeEmailService implements EmailService {
+
+    private final PostmarkEmailServiceImpl postmarkEmailServiceImpl;
+    private final EmailServiceImpl emailServiceImpl;
+    private final EmailRetryProperties retryProperties;
+
+    @Override
+    public void sendVerificationCode(String email, String code) {
+        try {
+            postmarkEmailServiceImpl.sendVerificationCode(email, code);
+        } catch (EmailException postmarkException) {
+            log.warn("Postmark failed, trying JavaMail. Reason: {}", postmarkException.getMessage());
+            try {
+                emailServiceImpl.sendVerificationCode(email, code);
+            } catch (EmailException javaMailEx) {
+                log.error("All email services failed: {}", javaMailEx.getMessage());
+                throw new EmailServiceUnavailableException("All email providers failed");
+            }
+        }
+    }
+}