#850 Fix export of legacy hashes property

- Ugly workaround due to #1014: need to have EnumSetProperty extend from StringListProperty type so that it is exported in a proper manner (as a string list). To get an enum Set we need to call a dedicated method on EnumSetProperty for the time being.

src/main/java/fr/xephi/authme/security/PasswordSecurity.java

@@ -6,6 +6,7 @@ import fr.xephi.authme.events.PasswordEncryptionEvent;
 import fr.xephi.authme.initialization.Reloadable;
 import fr.xephi.authme.security.crypts.EncryptionMethod;
 import fr.xephi.authme.security.crypts.HashedPassword;
+import fr.xephi.authme.settings.EnumSetProperty;
 import fr.xephi.authme.settings.Settings;
 import fr.xephi.authme.settings.properties.SecuritySettings;
 import org.bukkit.plugin.PluginManager;
@@ -41,7 +42,8 @@ public class PasswordSecurity implements Reloadable {
     @Override
     public void reload() {
         this.algorithm = settings.getProperty(SecuritySettings.PASSWORD_HASH);
-        this.legacyAlgorithms = settings.getProperty(SecuritySettings.LEGACY_HASHES);
+        // TODO #1014: Need to cast to specific type because ConfigMe ignores fields of child Property types
+        this.legacyAlgorithms = ((EnumSetProperty<HashAlgorithm>) SecuritySettings.LEGACY_HASHES).asEnumSet(settings);
     }
 
     /**

src/main/java/fr/xephi/authme/settings/EnumSetProperty.java

@@ -1,35 +1,38 @@
 package fr.xephi.authme.settings;
 
-import com.github.authme.configme.properties.Property;
-import com.github.authme.configme.resource.PropertyResource;
+import com.github.authme.configme.SettingsManager;
+import com.github.authme.configme.properties.StringListProperty;
 
 import java.util.List;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 /**
  * Property whose value is a set of entries of a given enum.
  */
-// TODO https://github.com/AuthMe/ConfigMe/issues/27: Should be a Property of Set<E> type
-public class EnumSetProperty<E extends Enum<E>> extends Property<List<E>> {
+// TODO #1014: This property type currently extends StringListProperty with a dedicated method  to convert the values
+// into a Set of the selected enum due to multiple issues on ConfigMe's side.
+public class EnumSetProperty<E extends Enum<E>> extends StringListProperty {
 
     private final Class<E> enumClass;
 
-    public EnumSetProperty(Class<E> enumClass, String path, List<E> defaultValue) {
-        super(path, defaultValue);
+    public EnumSetProperty(Class<E> enumClass, String path, String... values) {
+        super(path, values);
         this.enumClass = enumClass;
     }
 
-    @Override
-    protected List<E> getFromResource(PropertyResource resource) {
-        List<?> elements = resource.getList(getPath());
-        if (elements != null) {
-            return elements.stream()
-                .map(val -> toEnum(String.valueOf(val)))
-                .filter(e -> e != null)
-                .distinct()
-                .collect(Collectors.toList());
-        }
-        return null;
+    /**
+     * Returns the value as a set of enum entries.
+     *
+     * @param settings the settings manager to look up the raw value with
+     * @return the property's value as mapped enum entries
+     */
+    public Set<E> asEnumSet(SettingsManager settings) {
+        List<String> entries = settings.getProperty(this);
+        return entries.stream()
+            .map(str -> toEnum(str))
+            .filter(e -> e != null)
+            .collect(Collectors.toSet());
     }
 
     private E toEnum(String str) {

src/main/java/fr/xephi/authme/settings/properties/SecuritySettings.java

@@ -6,7 +6,6 @@ import com.github.authme.configme.properties.Property;
 import fr.xephi.authme.security.HashAlgorithm;
 import fr.xephi.authme.settings.EnumSetProperty;
 
-import java.util.Collections;
 import java.util.List;
 
 import static com.github.authme.configme.properties.PropertyInitializer.newLowercaseListProperty;
@@ -83,8 +82,8 @@ public class SecuritySettings implements SettingsHolder {
         "legacyHashes:",
         "- 'SHA1'"
     })
-    public static final Property<List<HashAlgorithm>> LEGACY_HASHES =
-        new EnumSetProperty<>(HashAlgorithm.class, "settings.security.legacyHashes", Collections.emptyList());
+    public static final Property<List<String>> LEGACY_HASHES =
+        new EnumSetProperty<>(HashAlgorithm.class, "settings.security.legacyHashes");
 
     @Comment({"Prevent unsafe passwords from being used; put them in lowercase!",
         "You should always set 'help' as unsafePassword due to possible conflicts.",

src/test/java/fr/xephi/authme/security/PasswordSecurityTest.java

@@ -26,8 +26,10 @@ import org.mockito.stubbing.Answer;
 
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 
 import static com.google.common.collect.Lists.newArrayList;
+import static com.google.common.collect.Sets.newHashSet;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.equalToIgnoringCase;
 import static org.junit.Assert.assertThat;
@@ -173,7 +175,7 @@ public class PasswordSecurityTest {
         given(method.comparePassword(clearTextPass, password, playerLowerCase)).willReturn(false);
         given(method.computeHash(clearTextPass, playerLowerCase)).willReturn(newPassword);
         initSettings(HashAlgorithm.MD5);
-        given(settings.getProperty(SecuritySettings.LEGACY_HASHES)).willReturn(newArrayList(HashAlgorithm.BCRYPT));
+        given(settings.getProperty(SecuritySettings.LEGACY_HASHES)).willReturn(newArrayList(HashAlgorithm.BCRYPT.name()));
         PasswordSecurity security = newPasswordSecurity();
 
         // when
@@ -258,7 +260,7 @@ public class PasswordSecurityTest {
         initSettings(HashAlgorithm.BCRYPT);
         PasswordSecurity passwordSecurity = newPasswordSecurity();
         given(settings.getProperty(SecuritySettings.PASSWORD_HASH)).willReturn(HashAlgorithm.MD5);
-        List<HashAlgorithm> legacyHashes = newArrayList(HashAlgorithm.CUSTOM, HashAlgorithm.BCRYPT);
+        List<String> legacyHashes = newArrayList(HashAlgorithm.CUSTOM.name(), HashAlgorithm.BCRYPT.name());
         given(settings.getProperty(SecuritySettings.LEGACY_HASHES)).willReturn(legacyHashes);
 
         // when
@@ -267,8 +269,9 @@ public class PasswordSecurityTest {
         // then
         assertThat(ReflectionTestUtils.getFieldValue(PasswordSecurity.class, passwordSecurity, "algorithm"),
             equalTo(HashAlgorithm.MD5));
+        Set<HashAlgorithm> legacyHashesSet = newHashSet(HashAlgorithm.CUSTOM, HashAlgorithm.BCRYPT);
         assertThat(ReflectionTestUtils.getFieldValue(PasswordSecurity.class, passwordSecurity, "legacyAlgorithms"),
-            equalTo(legacyHashes));
+            equalTo(legacyHashesSet));
     }
 
     private PasswordSecurity newPasswordSecurity() {