#1254 Create command to see recently logged in players

- Create datasource method to fetch most recent players by last login date
- Add command to view last logged in players

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

@@ -263,6 +263,11 @@ public class CacheDataSource implements DataSource {
             .collect(Collectors.toList());
     }
 
+    @Override
+    public List<PlayerAuth> getRecentlyLoggedInPlayers() {
+        return source.getRecentlyLoggedInPlayers();
+    }
+
     @Override
     public void invalidateCache(String playerName) {
         cachedAuths.invalidate(playerName);

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

@@ -225,6 +225,13 @@ public interface DataSource extends Reloadable {
      */
     List<PlayerAuth> getAllAuths();
 
+    /**
+     * Returns the last ten players who have recently logged in (first ten players with highest last login date).
+     *
+     * @return the 10 last players who last logged in
+     */
+    List<PlayerAuth> getRecentlyLoggedInPlayers();
+
     /**
      * Reload the data source.
      */

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

@@ -393,6 +393,11 @@ public class FlatFile implements DataSource {
         throw new UnsupportedOperationException("Flat file no longer supported");
     }
 
+    @Override
+    public List<PlayerAuth> getRecentlyLoggedInPlayers() {
+        throw new UnsupportedOperationException("Flat file no longer supported");
+    }
+
     /**
      * Creates a PlayerAuth object from the read data.
      *

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

@@ -716,6 +716,22 @@ public class MySQL implements DataSource {
         return players;
     }
 
+    @Override
+    public List<PlayerAuth> getRecentlyLoggedInPlayers() {
+        List<PlayerAuth> players = new ArrayList<>();
+        String sql = "SELECT * FROM " + tableName + " ORDER BY " + col.LAST_LOGIN + " DESC LIMIT 10;";
+        try (Connection con = getConnection();
+             Statement st = con.createStatement();
+             ResultSet rs = st.executeQuery(sql)) {
+            while (rs.next()) {
+                players.add(buildAuthFromResultSet(rs));
+            }
+        } catch (SQLException e) {
+            logSqlException(e);
+        }
+        return players;
+    }
+
     private PlayerAuth buildAuthFromResultSet(ResultSet row) throws SQLException {
         String salt = col.SALT.isEmpty() ? null : row.getString(col.SALT);
         int group = col.GROUP.isEmpty() ? -1 : row.getInt(col.GROUP);

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

@@ -639,6 +639,20 @@ public class SQLite implements DataSource {
         return players;
     }
 
+    @Override
+    public List<PlayerAuth> getRecentlyLoggedInPlayers() {
+        List<PlayerAuth> players = new ArrayList<>();
+        String sql = "SELECT * FROM " + tableName + " ORDER BY " + col.LAST_LOGIN + " DESC LIMIT 10;";
+        try (Statement st = con.createStatement(); ResultSet rs = st.executeQuery(sql)) {
+            while (rs.next()) {
+                players.add(buildAuthFromResultSet(rs));
+            }
+        } catch (SQLException e) {
+            logSqlException(e);
+        }
+        return players;
+    }
+
     private PlayerAuth buildAuthFromResultSet(ResultSet row) throws SQLException {
         String salt = !col.SALT.isEmpty() ? row.getString(col.SALT) : null;