OZG-7232 add basic auth if configured

Subtask: OZG-8005

document-manager-server/src/main/java/de/ozgcloud/document/bescheid/smartdocuments/SmartDocumentsConfiguration.java

@@ -23,6 +23,8 @@
  */
 package de.ozgcloud.document.bescheid.smartdocuments;
 
+import java.util.Objects;
+
 import org.apache.hc.client5.http.auth.AuthScope;
 import org.apache.hc.client5.http.auth.CredentialsProvider;
 import org.apache.hc.client5.http.impl.auth.CredentialsProviderBuilder;
@@ -35,6 +37,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpHeaders;
 import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
 import org.springframework.web.client.RestClient;
 
@@ -50,7 +53,7 @@ class SmartDocumentsConfiguration {
 		return RestClient.builder()
 				.requestFactory(new HttpComponentsClientHttpRequestFactory(buildHttpClient()))
 				.baseUrl(properties.getUrl())
-				.defaultHeaders(headers -> headers.setBasicAuth(properties.getBasicAuth().getUsername(), properties.getBasicAuth().getPassword()))
+				.defaultHeaders(this::addBasicAuthenticationIfConfigured)
 				.build();
 	}
 
@@ -85,4 +88,10 @@ class SmartDocumentsConfiguration {
 		return CredentialsProviderBuilder.create().add(new AuthScope(host, port), username, password).build();
 	}
 
+	void addBasicAuthenticationIfConfigured(HttpHeaders headers) {
+		if (Objects.nonNull(properties.getBasicAuth())) {
+			headers.setBasicAuth(properties.getBasicAuth().getUsername(), properties.getBasicAuth().getPassword());
+		}
+	}
+
 }

document-manager-server/src/test/java/de/ozgcloud/document/bescheid/smartdocuments/SmartDocumentsConfigurationTest.java

@@ -16,6 +16,7 @@ import org.junit.jupiter.api.Test;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.Spy;
+import org.springframework.http.HttpHeaders;
 
 import de.ozgcloud.document.bescheid.smartdocuments.SmartDocumentsProperties.ProxyConfiguration;
 
@@ -115,4 +116,30 @@ class SmartDocumentsConfigurationTest {
 			assertThat(httpClient).isSameAs(nonProxyHttpClient);
 		}
 	}
+
+	@Nested
+	class AddBasicAuthenticationIfConfiguredTest {
+
+		@Test
+		void shouldNotAddBasicAuthentication() {
+			when(properties.getBasicAuth()).thenReturn(null);
+			var headers = new HttpHeaders();
+
+			smartDocumentsConfiguration.addBasicAuthenticationIfConfigured(headers);
+
+			assertThat(headers.get(HttpHeaders.AUTHORIZATION)).isNull();
+		}
+
+		@Test
+		void shouldAddBasicAuthentication() {
+			when(properties.getBasicAuth()).thenReturn(UsernamePasswordTestFactory.create());
+			var headers = new HttpHeaders();
+
+			smartDocumentsConfiguration.addBasicAuthenticationIfConfigured(headers);
+
+			assertThat(headers.get(HttpHeaders.AUTHORIZATION))
+					.isNotNull()
+					.containsExactly(UsernamePasswordTestFactory.getAsBasicAuthenticationHeader());
+		}
+	}
 }
\ No newline at end of file

document-manager-server/src/test/java/de/ozgcloud/document/bescheid/smartdocuments/UsernamePasswordTestFactory.java

+package de.ozgcloud.document.bescheid.smartdocuments;
+
+import org.bouncycastle.util.encoders.Base64;
+
+import de.ozgcloud.document.bescheid.smartdocuments.SmartDocumentsProperties.UsernamePassword;
+
+public class UsernamePasswordTestFactory {
+
+	public static final String USERNAME = "max";
+	public static final String PASSWORD = "max123";
+
+	public static UsernamePassword create() {
+		var usernamePassword = new UsernamePassword();
+		usernamePassword.setUsername(USERNAME);
+		usernamePassword.setPassword(PASSWORD);
+		return usernamePassword;
+	}
+
+	public static String getAsBasicAuthenticationHeader() {
+		var base64EncodedAuth = new String(Base64.encode(
+				(UsernamePasswordTestFactory.USERNAME + ":" + UsernamePasswordTestFactory.PASSWORD).getBytes()));
+
+		return "Basic " + base64EncodedAuth;
+	}
+
+}