feat(jans-keycloak-integration): keycloak integration enhancements #8614

* added protocol mapper implementation

Signed-off-by: Rolain Djeumen <uprightech@gmail.com>

jans-keycloak-integration/spi/src/main/java/io/jans/kc/spi/protocol/mapper/saml/JansSamlUserAttributeMapper.java

@@ -0,0 +1,139 @@
+package io.jans.kc.spi.protocol.mapper.saml;
+
+import io.jans.kc.model.JansUserAttributeModel;
+import io.jans.kc.spi.ProviderIDs;
+import io.jans.kc.spi.custom.JansThinBridgeOperationException;
+import io.jans.kc.spi.custom.JansThinBridgeProvider;
+import io.jans.model.GluuStatus;
+
+import java.util.List;
+
+import org.jboss.logging.Logger;
+
+import org.keycloak.Config;
+
+import org.keycloak.models.AuthenticatedClientSessionModel;
+import org.keycloak.models.KeycloakSession;
+import org.keycloak.models.KeycloakSessionFactory;
+import org.keycloak.models.ProtocolMapperModel;
+import org.keycloak.models.UserSessionModel;
+
+import org.keycloak.dom.saml.v2.assertion.AttributeStatementType;
+import org.keycloak.dom.saml.v2.assertion.AttributeType;
+
+import org.keycloak.provider.ProviderConfigProperty;
+import org.keycloak.provider.ProviderConfigurationBuilder;
+
+import org.keycloak.protocol.saml.mappers.AttributeStatementHelper;
+import org.keycloak.protocol.saml.mappers.AbstractSAMLProtocolMapper;
+import org.keycloak.protocol.saml.mappers.SAMLAttributeStatementMapper;
+
+public class JansSamlUserAttributeMapper extends AbstractSAMLProtocolMapper implements SAMLAttributeStatementMapper {
+
+    private static final String DISPLAY_TYPE = "Janssen User Attribute";
+    private static final String DISPLAY_CATEGORY = AttributeStatementHelper.ATTRIBUTE_STATEMENT_CATEGORY;
+    private static final String HELP_TEXT = "Maps a Janssen User's Attribute to a SAML Attribute";
+
+    private static final String PROVIDER_ID = ProviderIDs.JANS_SAML_USER_ATTRIBUTE_MAPPER_PROVIDER;
+    //properties 
+    private static final String JANS_ATTR_NAME_PROP_NAME = "jans.attribute.name";
+    private static final String JANS_ATTR_NAME_PROP_LABEL = "Jans Attribute";
+    private static final String JANS_ATTR_NAME_PROP_HELPTEXT = "Name of the Attribute in Janssen Auth Server";
+    private static final List<ProviderConfigProperty> configProperties;
+
+    private static final Logger log = Logger.getLogger(JansSamlUserAttributeMapper.class);
+
+    static {
+        configProperties = ProviderConfigurationBuilder.create()
+            .property()
+                .name(JANS_ATTR_NAME_PROP_NAME)
+                .label(JANS_ATTR_NAME_PROP_LABEL)
+                .helpText(JANS_ATTR_NAME_PROP_HELPTEXT)
+                .type(ProviderConfigProperty.STRING_TYPE)
+                .defaultValue(null)
+                .required(true)
+                .add()
+            .build();
+    }
+
+    public JansSamlUserAttributeMapper() {
+
+
+    }
+
+    @Override
+    public void init(Config.Scope scope) {
+
+    }
+
+    @Override
+    public void close() {
+
+    }
+
+    @Override 
+    public void postInit(KeycloakSessionFactory factory) {
+
+    }
+
+    @Override
+    public void transformAttributeStatement(AttributeStatementType attributeStatement, ProtocolMapperModel mappingModel, KeycloakSession session,
+        UserSessionModel userSession, AuthenticatedClientSessionModel clientSession) {
+
+        try {
+            final JansThinBridgeProvider jansThinBridge = session.getProvider(JansThinBridgeProvider.class);
+            final String attributeName = mappingModel.getConfig().get(JANS_ATTR_NAME_PROP_NAME);
+            final String loginUsername = userSession.getLoginUsername();
+            final JansUserAttributeModel userAttribute = jansThinBridge.getUserAttribute(loginUsername,attributeName);
+            if(userAttribute == null) {
+                log.info("Could not find jans attribute information for user " + loginUsername);
+                return;
+            }
+            if(!userAttribute.isActive()) {
+                log.info("Jans attribute " + attributeName + " is not active");
+                return;
+            }
+            AttributeType keycloakAttribute = userAttribute.asSamlKeycloakAttribute();
+            if(keycloakAttribute == null) {
+                log.info("Could not convert jans attribute " + attributeName + " into a keycloak attribute");
+                return;
+            }
+            attributeStatement.addAttribute(new AttributeStatementType.ASTChoiceType(keycloakAttribute));
+        }catch(JansThinBridgeOperationException e) {
+            log.error("Error mapping saml attribute from jans",e);
+        }
+
+    }
+
+    @Override
+    public List<ProviderConfigProperty> getConfigProperties() {
+
+        return configProperties;
+    }
+
+    @Override
+    public String getId() {
+
+        return PROVIDER_ID;
+    }
+
+    @Override
+    public String getDisplayType() {
+
+        return DISPLAY_TYPE;
+    }
+
+    @Override
+    public String getDisplayCategory() {
+
+        return DISPLAY_CATEGORY;
+    }
+
+    @Override
+    public String getHelpText() {
+
+        return HELP_TEXT;
+    }
+
+
+}