Issue #24: Füge PermissionEvaluator zur Gesamtprüfung der Berechtigung hinzu

Dieser PermissionEvaluator delegiert die einzelnen Prüfungen an PermissionEvaluatoren
welche `AbstractDelegatedPermissionEvaluator` erweitern.

Nur, wenn all diese PermissionEvaluatoren die Berechtigung erfolgreich geprüft haben,
gibt dieser PermissionEvaluator ein positives Prüfungsergebnis zurück.

src/main/java/DNPM/security/AbstractDelegatedPermissionEvaluator.java

@@ -0,0 +1,26 @@
+package DNPM.security;
+
+import de.itc.onkostar.api.IOnkostarApi;
+import de.itc.onkostar.api.Patient;
+import de.itc.onkostar.api.Procedure;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.security.access.PermissionEvaluator;
+
+import javax.sql.DataSource;
+
+public abstract class AbstractDelegatedPermissionEvaluator implements PermissionEvaluator {
+
+    protected static final String PATIENT = Patient.class.getSimpleName();
+
+    protected static final String PROCEDURE = Procedure.class.getSimpleName();
+
+    protected final IOnkostarApi onkostarApi;
+
+    protected final JdbcTemplate jdbcTemplate;
+
+    protected AbstractDelegatedPermissionEvaluator(final IOnkostarApi onkostarApi, final DataSource dataSource) {
+        this.onkostarApi = onkostarApi;
+        this.jdbcTemplate = new JdbcTemplate(dataSource);
+    }
+
+}

src/main/java/DNPM/security/DelegatingDataBasedPermissionEvaluator.java

@@ -0,0 +1,56 @@
+package DNPM.security;
+
+import org.springframework.security.access.PermissionEvaluator;
+import org.springframework.security.core.Authentication;
+import org.springframework.stereotype.Component;
+
+import java.io.Serializable;
+import java.util.List;
+
+/**
+ * PermissionEvaluator zur Gesamtprüfung der Zugriffsberechtigung.
+ * Die konkrete Berechtigungsprüfung wird an die nachgelagerten PermissionEvaluatoren delegiert,
+ * welche jeweils einzeln dem Zugriff zustimmen müssen.
+ */
+@Component
+public class DelegatingDataBasedPermissionEvaluator implements PermissionEvaluator {
+
+    private final List<AbstractDelegatedPermissionEvaluator> permissionEvaluators;
+
+    public DelegatingDataBasedPermissionEvaluator(final List<AbstractDelegatedPermissionEvaluator> permissionEvaluators) {
+        this.permissionEvaluators = permissionEvaluators;
+    }
+
+    /**
+     * Auswertung der Zugriffsberechtigung für authentifizierten Benutzer auf Zielobjekt mit angeforderter Berechtigung.
+     * Hierbei wird die Berechtigungsprüfung an alle nachgelagerten PermissionEvaluatoren delegiert.
+     * Alle müssen dem Zugriff zustimmen.
+     *
+     * @param authentication Das Authentication Objekt
+     * @param targetObject Das Zielobjekt
+     * @param permissionType Die angeforderte Berechtigung
+     * @return Gibt <code>true</code> zurück, wenn der Benutzer die Berechtigung hat
+     */
+    @Override
+    public boolean hasPermission(Authentication authentication, Object targetObject, Object permissionType) {
+        return permissionEvaluators.stream()
+                .allMatch(permissionEvaluator -> permissionEvaluator.hasPermission(authentication, targetObject, permissionType));
+    }
+
+    /**
+     * Auswertung anhand der ID und des Namens des Zielobjekts.
+     * Hierbei wird die Berechtigungsprüfung an alle nachgelagerten PermissionEvaluatoren delegiert.
+     * Alle müssen dem Zugriff zustimmen.
+     *
+     * @param authentication Authentication-Object
+     * @param targetId ID des Objekts
+     * @param targetType Name der Zielobjektklasse
+     * @param permissionType Die angeforderte Berechtigung
+     * @return Gibt <code>true</code> zurück, wenn der Benutzer die Berechtigung hat
+     */
+    @Override
+    public boolean hasPermission(Authentication authentication, Serializable targetId, String targetType, Object permissionType) {
+        return permissionEvaluators.stream()
+                .allMatch(permissionEvaluator -> permissionEvaluator.hasPermission(authentication, targetId, targetType, permissionType));
+    }
+}

src/main/java/DNPM/security/FormBasedPermissionEvaluator.java

@@ -3,8 +3,6 @@ package DNPM.security;
 import de.itc.onkostar.api.IOnkostarApi;
 import de.itc.onkostar.api.Patient;
 import de.itc.onkostar.api.Procedure;
-import org.springframework.jdbc.core.JdbcTemplate;
-import org.springframework.security.access.PermissionEvaluator;
 import org.springframework.security.core.Authentication;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.stereotype.Component;
@@ -17,15 +15,10 @@ import java.util.List;
  * Permission-Evaluator zur Auswertung der Berechtigung auf Objekte aufgrund der Formularberechtigung
  */
 @Component
-public class FormBasedPermissionEvaluator implements PermissionEvaluator {
-
-    private final IOnkostarApi onkostarApi;
-
-    private final JdbcTemplate jdbcTemplate;
+public class FormBasedPermissionEvaluator extends AbstractDelegatedPermissionEvaluator {
 
     public FormBasedPermissionEvaluator(final IOnkostarApi onkostarApi, final DataSource dataSource) {
-        this.onkostarApi = onkostarApi;
-        this.jdbcTemplate = new JdbcTemplate(dataSource);
+        super(onkostarApi, dataSource);
     }
 
     /**
@@ -63,7 +56,7 @@ public class FormBasedPermissionEvaluator implements PermissionEvaluator {
     @Override
     public boolean hasPermission(Authentication authentication, Serializable targetId, String targetType, Object permissionType) {
         if (targetId instanceof Integer) {
-            if ("Patient".equals(targetType)) {
+            if (PATIENT.equals(targetType)) {
                 return true;
             }
             var procedure = this.onkostarApi.getProcedure((int)targetId);

src/main/java/DNPM/security/PersonPoolBasedPermissionEvaluator.java

@@ -3,8 +3,6 @@ package DNPM.security;
 import de.itc.onkostar.api.IOnkostarApi;
 import de.itc.onkostar.api.Patient;
 import de.itc.onkostar.api.Procedure;
-import org.springframework.jdbc.core.JdbcTemplate;
-import org.springframework.security.access.PermissionEvaluator;
 import org.springframework.security.core.Authentication;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.stereotype.Component;
@@ -17,15 +15,10 @@ import java.util.List;
  * Permission-Evaluator zur Auswertung der Berechtigung auf Objekte aufgrund der Personenstammberechtigung
  */
 @Component
-public class PersonPoolBasedPermissionEvaluator implements PermissionEvaluator {
-
-    private final IOnkostarApi onkostarApi;
-
-    private final JdbcTemplate jdbcTemplate;
+public class PersonPoolBasedPermissionEvaluator extends AbstractDelegatedPermissionEvaluator {
 
     public PersonPoolBasedPermissionEvaluator(final IOnkostarApi onkostarApi, final DataSource dataSource) {
-        this.onkostarApi = onkostarApi;
-        this.jdbcTemplate = new JdbcTemplate(dataSource);
+        super(onkostarApi, dataSource);
     }
 
     /**
@@ -70,18 +63,14 @@ public class PersonPoolBasedPermissionEvaluator implements PermissionEvaluator {
 
     private String getPersonPoolCode(int id, String type) {
         Patient patient = null;
-        switch (type) {
-            case "Patient":
-                patient = onkostarApi.getPatient(id);
-                break;
-            case "Procedure":
-                var procedure = onkostarApi.getProcedure(id);
-                if (null != procedure) {
-                    patient = procedure.getPatient();
-                }
-                break;
-            default:
-                break;
+
+        if (PATIENT.equals(type)) {
+            patient = onkostarApi.getPatient(id);
+        } else if (PROCEDURE.equals(type)) {
+            var procedure = onkostarApi.getProcedure(id);
+            if (null != procedure) {
+                patient = procedure.getPatient();
+            }
         }
 
         if (null != patient) {

src/test/java/DNPM/security/DelegatingDataBasedPermissionEvaluatorTest.java

@@ -0,0 +1,122 @@
+package DNPM.security;
+
+import de.itc.onkostar.api.IOnkostarApi;
+import de.itc.onkostar.api.Patient;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.GrantedAuthority;
+
+import java.util.Collection;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.*;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+class DelegatingDataBasedPermissionEvaluatorTest {
+
+    private IOnkostarApi onkostarApi;
+
+    private PersonPoolBasedPermissionEvaluator personPoolBasedPermissionEvaluator;
+
+    private FormBasedPermissionEvaluator formBasedPermissionEvaluator;
+
+    private DelegatingDataBasedPermissionEvaluator delegatingDataBasedPermissionEvaluator;
+
+    @BeforeEach
+    void setup(
+            @Mock IOnkostarApi onkostarApi,
+            @Mock PersonPoolBasedPermissionEvaluator personPoolBasedPermissionEvaluator,
+            @Mock FormBasedPermissionEvaluator formBasedPermissionEvaluator
+            ) {
+        this.onkostarApi = onkostarApi;
+        this.personPoolBasedPermissionEvaluator = personPoolBasedPermissionEvaluator;
+        this.formBasedPermissionEvaluator = formBasedPermissionEvaluator;
+
+        this.delegatingDataBasedPermissionEvaluator = new DelegatingDataBasedPermissionEvaluator(
+                List.of(personPoolBasedPermissionEvaluator, formBasedPermissionEvaluator)
+        );
+    }
+
+    @Test
+    void testShouldGrantPermissionIfAllDelegatedPermissionEvaluatorsGrantsAccessByObject() {
+        when(personPoolBasedPermissionEvaluator.hasPermission(any(), any(Patient.class), any(PermissionType.class))).thenReturn(true);
+        when(formBasedPermissionEvaluator.hasPermission(any(), any(Patient.class), any(PermissionType.class))).thenReturn(true);
+
+        var actual = delegatingDataBasedPermissionEvaluator.hasPermission(new DummyAuthentication(), new Patient(this.onkostarApi), PermissionType.READ);
+
+        assertThat(actual).isTrue();
+    }
+
+    @Test
+    void testShouldGrantPermissionIfAllDelegatedPermissionEvaluatorsGrantsAccessByIdAndType() {
+        when(personPoolBasedPermissionEvaluator.hasPermission(any(), anyInt(), anyString(), any(PermissionType.class))).thenReturn(true);
+        when(formBasedPermissionEvaluator.hasPermission(any(), anyInt(), anyString(), any(PermissionType.class))).thenReturn(true);
+
+        var actual = delegatingDataBasedPermissionEvaluator.hasPermission(new DummyAuthentication(), 123, "Patient", PermissionType.READ);
+
+        assertThat(actual).isTrue();
+    }
+
+    @Test
+    void testShouldDenyPermissionIfAtLeastOneDelegatedPermissionEvaluatorsDeniesAccessByObject() {
+        when(personPoolBasedPermissionEvaluator.hasPermission(any(), any(Patient.class), any(PermissionType.class))).thenReturn(true);
+        when(formBasedPermissionEvaluator.hasPermission(any(), any(Patient.class), any(PermissionType.class))).thenReturn(false);
+
+        var actual = delegatingDataBasedPermissionEvaluator.hasPermission(new DummyAuthentication(), new Patient(this.onkostarApi), PermissionType.READ);
+
+        assertThat(actual).isFalse();
+    }
+
+    @Test
+    void testShouldDenyPermissionIfAtLeastOneDelegatedPermissionEvaluatorsDeniesAccessByIdAndType() {
+        when(personPoolBasedPermissionEvaluator.hasPermission(any(), anyInt(), anyString(), any(PermissionType.class))).thenReturn(false);
+
+        var actual = delegatingDataBasedPermissionEvaluator.hasPermission(new DummyAuthentication(), 123, "Patient", PermissionType.READ);
+
+        assertThat(actual).isFalse();
+    }
+
+}
+
+class DummyAuthentication implements Authentication {
+    @Override
+    public String getName() {
+        return "dummy";
+    }
+
+    @Override
+    public Collection<? extends GrantedAuthority> getAuthorities() {
+        return null;
+    }
+
+    @Override
+    public Object getCredentials() {
+        return null;
+    }
+
+    @Override
+    public Object getDetails() {
+        return null;
+    }
+
+    @Override
+    public Object getPrincipal() {
+        return null;
+    }
+
+    @Override
+    public boolean isAuthenticated() {
+        return false;
+    }
+
+    @Override
+    public void setAuthenticated(boolean b) throws IllegalArgumentException {
+
+    }
+}