#784 Separate purge execution and purge task creation

- Delete accounts in PurgeExecutor, after permission check

src/main/java/fr/xephi/authme/datasource/CacheDataSource.java

@@ -15,6 +15,7 @@ import fr.xephi.authme.cache.auth.PlayerCache;
 import fr.xephi.authme.security.crypts.HashedPassword;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.Callable;
@@ -184,7 +185,7 @@ public class CacheDataSource implements DataSource {
     }
 
     @Override
-    public void purgeRecords(final Set<String> banned) {
+    public void purgeRecords(final Collection<String> banned) {
         source.purgeRecords(banned);
         cachedAuths.invalidateAll(banned);
     }

src/main/java/fr/xephi/authme/datasource/DataSource.java

@@ -4,6 +4,7 @@ import fr.xephi.authme.cache.auth.PlayerAuth;
 import fr.xephi.authme.initialization.Reloadable;
 import fr.xephi.authme.security.crypts.HashedPassword;
 
+import java.util.Collection;
 import java.util.List;
 import java.util.Set;
 
@@ -82,7 +83,7 @@ public interface DataSource extends Reloadable {
      *
      * @param toPurge The players to purge
      */
-    void purgeRecords(Set<String> toPurge);
+    void purgeRecords(Collection<String> toPurge);
 
     /**
      * Remove a user record from the database.

src/main/java/fr/xephi/authme/datasource/FlatFile.java

@@ -17,6 +17,7 @@ import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -256,7 +257,7 @@ public class FlatFile implements DataSource {
     }
 
     @Override
-    public void purgeRecords(Set<String> toPurge) {
+    public void purgeRecords(Collection<String> toPurge) {
         BufferedReader br = null;
         BufferedWriter bw = null;
         ArrayList<String> lines = new ArrayList<>();

src/main/java/fr/xephi/authme/datasource/MySQL.java

@@ -23,6 +23,7 @@ import java.sql.SQLException;
 import java.sql.Statement;
 import java.sql.Types;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -693,7 +694,7 @@ public class MySQL implements DataSource {
     }
 
     @Override
-    public void purgeRecords(Set<String> toPurge) {
+    public void purgeRecords(Collection<String> toPurge) {
         String sql = "DELETE FROM " + tableName + " WHERE " + col.NAME + "=?;";
         try (Connection con = getConnection(); PreparedStatement pst = con.prepareStatement(sql)) {
             for (String name : toPurge) {

src/main/java/fr/xephi/authme/datasource/SQLite.java

@@ -16,6 +16,7 @@ import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -317,7 +318,7 @@ public class SQLite implements DataSource {
     }
 
     @Override
-    public void purgeRecords(Set<String> toPurge) {
+    public void purgeRecords(Collection<String> toPurge) {
         String delete = "DELETE FROM " + tableName + " WHERE " + col.NAME + "=?;";
         try (PreparedStatement deletePst = con.prepareStatement(delete)) {
             for (String name : toPurge) {