Add Schematic Revisions

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/world/ClipboardListener.java

@@ -21,6 +21,7 @@ package de.steamwar.bausystem.features.world;
 
 import de.steamwar.bausystem.Permission;
 import de.steamwar.linkage.Linked;
+import de.steamwar.sql.NodeData;
 import de.steamwar.sql.SchematicData;
 import de.steamwar.sql.SchematicNode;
 import de.steamwar.sql.SteamwarUser;
@@ -65,7 +66,8 @@ public class ClipboardListener implements Listener {
         }
 
         try {
-            new SchematicData(schematic).saveFromPlayer(e.getPlayer());
+            NodeData.get(schematic).forEach(NodeData::delete);
+            SchematicData.saveFromPlayer(e.getPlayer(), schematic);
         } catch (Exception ex) {
             if (newSchem) {
                 schematic.delete();

CommonCore/SQL/src/de/steamwar/sql/NodeData.java

@@ -23,8 +23,13 @@ import de.steamwar.sql.internal.*;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 
+import javax.swing.plaf.nimbus.State;
 import java.io.*;
 import java.sql.PreparedStatement;
+import java.sql.Timestamp;
+import java.time.Instant;
+import java.util.List;
+import java.util.Optional;
 import java.util.zip.GZIPInputStream;
 
 @AllArgsConstructor
@@ -40,26 +45,47 @@ public class NodeData {
 
     private static final Table<NodeData> table = new Table<>(NodeData.class);
 
-    private static final Statement updateDatabase = new Statement("INSERT INTO NodeData(NodeId, NodeFormat, SchemData) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE NodeFormat = VALUES(NodeFormat), SchemData = VALUES(SchemData)");
+    private static final Statement updateDatabase = new Statement("INSERT INTO NodeData(NodeId, NodeFormat, SchemData) VALUES (?, ?, ?)", true);
-    private static final Statement selSchemData = new Statement("SELECT SchemData FROM NodeData WHERE NodeId = ?");
+    private static final Statement selSchemData = new Statement("SELECT SchemData FROM NodeData WHERE NodeId = ? AND CreatedAt = ?");
+    private static final Statement delete = table.delete(Table.PRIMARY);
 
-    private static final SelectStatement<NodeData> get = table.select(Table.PRIMARY);
+    private static final SelectStatement<NodeData> get = new SelectStatement<>(table, "SELECT NodeId, CreatedAt, NodeFormat FROM NodeData WHERE NodeId = ? ORDER BY CreatedAt ");
+    private static final Statement getRevisions = new Statement("SELECT COUNT(DISTINCT CreatedAt) as CNT FROM NodeData WHERE NodeId = ?");
+    private static final SelectStatement<NodeData> getLatest = new SelectStatement<>(table, "SELECT NodeId, CreatedAt, NodeFormat FROM NodeData WHERE NodeId = ? ORDER BY CreatedAt LIMIT 1");
 
-    public static NodeData get(SchematicNode node) {
+    public static NodeData getLatest(SchematicNode node) {
-        if(node.isDir())
+        if (node.isDir()) throw new IllegalArgumentException("Node is dir");
-            throw new IllegalArgumentException("Node is a directory");
+        return Optional.ofNullable(getLatest.select(node)).orElseGet(() -> new NodeData(node.getId(), Timestamp.from(Instant.now()), SchematicFormat.MCEDIT));
-        return get.select(rs -> {
+    }
+
+    public static List<NodeData> get(SchematicNode node) {
+        return get.listSelect(node);
+    }
+
+    public static NodeData get(SchematicNode node, int revision) {
+        return get.listSelect(node).get(revision - 1);
+    }
+
+    public static int getRevisions(SchematicNode node) {
+        return getRevisions.select(rs -> {
             if (rs.next()) {
-                return new NodeData(node.getId(), SchematicFormat.values()[rs.getInt("NodeFormat")]);
+                return rs.getInt("CNT");
             } else {
-                return new NodeData(node.getId(), SchematicFormat.MCEDIT);
+                return 0;
             }
         }, node);
     }
 
+    public static void saveFromStream(SchematicNode node, InputStream blob, SchematicFormat format) {
+        updateDatabase.update(node.getId(), format, blob);
+    }
+
     @Field(keys = {Table.PRIMARY})
     private final int nodeId;
 
+    @Field
+    private Timestamp createdAt;
+
     @Field
     private SchematicFormat nodeFormat;
 
@@ -84,15 +110,19 @@ public class NodeData {
                 } catch (IOException e) {
                     throw new SecurityException("SchemData is wrong", e);
                 }
-            }, nodeId);
+            }, nodeId, createdAt);
         } catch (Exception e) {
             throw new IOException(e);
         }
     }
 
+    @Deprecated
     public void saveFromStream(InputStream blob, SchematicFormat newFormat) {
-        updateDatabase.update(nodeId, newFormat, blob);
+        saveFromStream(SchematicNode.getSchematicNode(nodeId), blob, newFormat);
-        nodeFormat = newFormat;
+    }
+
+    public void delete() {
+        delete.update(nodeId, createdAt);
     }
 
     @AllArgsConstructor

CommonCore/SQL/src/de/steamwar/sql/SchematicNode.java

@@ -407,7 +407,7 @@ public class SchematicNode {
     public String getFileEnding() {
         if (isDir())
             throw new SecurityException("Node is Directory");
-        return NodeData.get(this).getNodeFormat().getFileEnding();
+        return NodeData.getLatest(this).getNodeFormat().getFileEnding();
     }
 
     public int getRank() {

FightSystem/FightSystem_14/src/de/steamwar/fightsystem/utils/WorldeditWrapper14.java

@@ -145,6 +145,6 @@ public class WorldeditWrapper14 implements WorldeditWrapper {
             throw new SecurityException(e);
         }
 
-        new SchematicData(schem).saveFromBytes(outputStream.toByteArray(), NodeData.SchematicFormat.SPONGE_V2);
+        SchematicData.saveFromBytes(schem, outputStream.toByteArray(), NodeData.SchematicFormat.SPONGE_V2);
     }
 }

FightSystem/FightSystem_8/src/de/steamwar/fightsystem/utils/WorldeditWrapper8.java

@@ -140,6 +140,6 @@ public class WorldeditWrapper8 implements WorldeditWrapper {
             throw new SecurityException(e);
         }
 
-        new SchematicData(schem).saveFromBytes(outputStream.toByteArray(), NodeData.SchematicFormat.MCEDIT);
+        SchematicData.saveFromBytes(schem, outputStream.toByteArray(), NodeData.SchematicFormat.MCEDIT);
     }
 }

FightSystem/FightSystem_Core/src/de/steamwar/fightsystem/listener/PrepareSchem.java

@@ -83,13 +83,7 @@ public class PrepareSchem implements Listener {
                     return;
                 }
 
-                if(schemExists(schem))
+                schem.setSchemtype(Config.SchematicType.checkType());
-                    return;
-
-                SchematicNode old = schem;
-                schem = SchematicNode.createSchematicNode(schem.getOwner(), preparedName(schem), schem.getParent(), Config.SchematicType.checkType().toDB(), schem.getItem());
-                schem.setReplaceColor(old.replaceColor());
-                schem.setAllowReplay(old.allowReplay());
 
                 try{
                     WorldeditWrapper.impl.saveSchem(schem, region, minY);
@@ -119,20 +113,5 @@ public class PrepareSchem implements Listener {
             FightState.setFightState(FightState.PRE_SCHEM_SETUP);
             FightState.setFightState(FightState.POST_SCHEM_SETUP);
         }
-
-        schemExists(SchematicNode.getSchematicNode(Config.PrepareSchemID));
-    }
-
-    private boolean schemExists(SchematicNode schem) {
-        if(SchematicNode.getSchematicNode(schem.getOwner(), preparedName(schem), schem.getParent()) != null) {
-            FightSystem.getMessage().broadcast("PREPARE_SCHEM_EXISTS");
-            Bukkit.shutdown();
-            return true;
-        }
-        return false;
-    }
-
-    private String preparedName(SchematicNode schem) {
-        return schem.getName() + "-prepared";
     }
 }

FightSystem/FightSystem_Core/src/de/steamwar/fightsystem/record/Recorder.java

@@ -275,7 +275,7 @@ public interface Recorder {
 
         ByteArrayOutputStream buffer = new ByteArrayOutputStream();
         try{
-            copy(NodeData.get(SchematicNode.getSchematicNode(schemId)).schemData(), buffer);
+            copy(NodeData.getLatest(SchematicNode.getSchematicNode(schemId)).schemData(), buffer);
         }catch (EOFException e) {
             Bukkit.getLogger().log(Level.INFO, "EOFException ignored");
         } catch (IOException e) {

LegacyBauSystem/src/de/steamwar/bausystem/world/ClipboardListener.java

@@ -53,7 +53,7 @@ public class ClipboardListener implements Listener {
         }
 
         try {
-            new SchematicData(schematic).saveFromPlayer(e.getPlayer());
+            SchematicData.saveFromPlayer(e.getPlayer(), schematic);
         } catch (Exception ex) {
             if (newSchem) {
                 schematic.delete();

SchematicSystem/SchematicSystem_Core/src/SchematicSystem.properties

@@ -26,6 +26,7 @@ CLICK_DRAG_ITEM=§7Click or drag item here
 CURRENT=§7Current: {0}
 CONFIRM=§aConfirm
 CANCEL=§cCancel
+BLANK={0}
 
 UTIL_NAME_REQUIRED=§cFolder name required
 UTIL_NAME_TOO_LONG=§cSchematic name too long
@@ -49,6 +50,7 @@ UTIL_LIST_NEXT=Page ({0}/{1}) »»
 UTIL_LIST_NEXT_HOVER=§eNext page
 UTIL_INFO_SCHEM=§7Schematic: §e{0}
 UTIL_INFO_NAME=§7Name: §e{0}
+UTIL_INFO_REVISIONS=§7Revisions: §e{0}
 UTIL_INFO_OWNER=§7Owner: §e{0}
 UTIL_INFO_PARENT=§7Directory: §e{0}
 UTIL_INFO_UPDATED=§7Last update: §e{0}
@@ -70,6 +72,7 @@ UTIL_INFO_ACTION_TYPE_HOVER=§eChange schematic type
 UTIL_INFO_ACTION_ADD_HOVER=§eAdd member
 UTIL_INFO_ACTION_REMOVE_HOVER=§eRemove {0}
 UTIL_INFO_ACTION_MOVE_HOVER=§eMove schematic
+UTIL_INFO_ACTION_REVISIONS_HOVER=§eList revisions
 UTIL_INFO_ACTION_RENAME_HOVER=§eRename schematic
 UTIL_INFO_ACTION_DELETE=(Delete) 
 UTIL_INFO_ACTION_DELETE_HOVER=§eDelete schematic
@@ -79,6 +82,7 @@ UTIL_LOAD_DIR=§cYou cannot load folders
 UTIL_LOAD_DONE=§7Schematic §e{0} loaded
 UTIL_LOAD_NO_DATA=§cNo data could be found in the Schematic
 UTIL_LOAD_ERROR=§cThe schematic could not be loaded
+UTIL_LOAD_ILLEGAL_REVISION=§cThe schematic doesn't have {0} revisions
 UTIL_DOWNLOAD_PUNISHED=§cYou are not allowed to download schematics: §f§l{0}
 UTIL_DOWNLOAD_NOT_OWN=§cYou may download only your own schematics
 UTIL_DOWNLOAD_LINK=Your download link:
@@ -224,6 +228,9 @@ GUI_DELETE_MEMBER_TITLE=Remove {0}
 GUI_DELETE_MEMBER_DONE=Access to Schematic §e{0} §7removed
 GUI_DELETE_MEMBERS_TITLE=Remove members
 GUI_CHANGE_ITEM=Change item
+GUI_LOAD_LATEST=§eLeft §7Click → §eLoad latest
+GUI_LOAD_REVISION=§eRight §7Click → §eList Revisions
+GUI_LOAD_REVISION_TITLE=Select Revision
 
 AUTO_CHECK_RESULT_NOT_LOAD=The schematic could not be loaded
 AUTO_CHECK_RESULT_TOO_WIDE=The schematic is too wide ({0} > {1})
@@ -264,3 +271,7 @@ AUTO_CHECKER_RESULT_TOO_MANY_DISPENSER_ITEMS=§7Dispenser: §c[{0}, {1}, {2}]§7
 AUTO_CHECKER_RESULT_FORBIDDEN_ITEM_NBT=§7Forbidden Item NBT: [{0}, {1}, {2}] -> §c{3}
 AUTO_CHECKER_RESULT_TELEPORT_HERE=§7Teleport to block
 AUTO_CHECKER_RESULT_AFTER_DEADLINE=§cThe deadline has expired: {0}
+
+REVISIONS_TITLE=§7Revisions:
+REVISIONS_REVISION_NUMBER=§7#{0}: §e{1}
+REVISIONS_EMPTY=§cNo Revisions

SchematicSystem/SchematicSystem_Core/src/SchematicSystem_de.properties

@@ -90,6 +90,9 @@ UTIL_SUBMIT_DIRECT=§eDirekt einsenden
 UTIL_SUBMIT_DIRECT_DONE=§aDie Schematic wird zeitnah überprüft
 UTIL_SUBMIT_EXTEND=§eSchematic ausfahren
 UTIL_SUBMIT_EXTEND_DONE=§aDer Vorbereitungsserver wird gestartet
+UTIL_INFO_ACTION_REVISIONS_HOVER=§eVersionen anzeigen
+UTIL_LOAD_ILLEGAL_REVISION=§cDie schematic hat nicht {0} Versionen
+UTIL_INFO_REVISIONS=§7Versionen: §e{0}
 
 COMMAND_INVALID_NODE=§cDie Schematic konnte nicht gefunden werden
 COMMAND_NOT_OWN=§cDas darfst du nur bei deinen eigenen Schematics machen
@@ -204,6 +207,9 @@ GUI_DELETE_MEMBER_TITLE={0} entfernen
 GUI_DELETE_MEMBER_DONE=Zugriff zu Schematic §e{0} §7entfernt
 GUI_DELETE_MEMBERS_TITLE=Mitglieder entfernen
 GUI_CHANGE_ITEM=Item ändern
+GUI_LOAD_LATEST=§eLinks §7Klick → §eLetzte Laden
+GUI_LOAD_REVISION=§eRechts §7Klick → §eVersionen anzeigen
+GUI_LOAD_REVISION_TITLE=Version Laden
 
 AUTO_CHECK_RESULT_NOT_LOAD=Die Schematic konnte nicht geladen werden
 AUTO_CHECK_RESULT_TOO_WIDE=Die Schematic ist zu breit ({0} > {1})
@@ -243,3 +249,6 @@ AUTO_CHECKER_RESULT_TOO_MANY_DISPENSER_ITEMS=§7Dispenser: §c[{0}, {1}, {2}]§7
 AUTO_CHECKER_RESULT_FORBIDDEN_ITEM_NBT=§7Verbotene NBT-Daten: [{0}, {1}, {2}] -> §c{3}
 AUTO_CHECKER_RESULT_TELEPORT_HERE=§7Zum block teleportieren
 AUTO_CHECKER_RESULT_AFTER_DEADLINE=§cDer einsendeschluss ist bereits vorbei: {0}
+
+REVISIONS_TITLE=§7Versionen:
+REVISIONS_EMPTY=§cKeine Versionen

SchematicSystem/SchematicSystem_Core/src/de/steamwar/schematicsystem/commands/DownloadCommand.java

@@ -43,7 +43,7 @@ public class DownloadCommand extends SWCommand {
         }
 
         try {
-            new SchematicData(copyNode).saveFromPlayer(player);
+            SchematicData.saveFromPlayer(player, copyNode);
         } catch (IOException e) {
             SchematicSystem.MESSAGE.send("DOWNLOAD_ERROR", player);
             if (newSchem) {

SchematicSystem/SchematicSystem_Core/src/de/steamwar/schematicsystem/commands/schematiccommand/GUI.java

@@ -95,9 +95,28 @@ public class GUI {
         SteamwarUser user = getUser(player);
         SWInventory inv = new SWInventory(player, 9 * 2, node.generateBreadcrumbs());
         if(!node.isDir()) {
-            inv.setItem(0, SWItem.getMaterial("WOOD_AXE"), SchematicSystem.MESSAGE.parse("GUI_INFO_LOAD", player), click -> {
+            inv.setItem(0, SWItem.getMaterial("WOOD_AXE"), SchematicSystem.MESSAGE.parse("GUI_INFO_LOAD", player), Arrays.asList(
+                    SchematicSystem.MESSAGE.parse("GUI_LOAD_LATEST", player),
+                    SchematicSystem.MESSAGE.parse("GUI_LOAD_REVISION", player)
+            ), false, click -> {
+                if (click.isLeftClick()) {
                     player.closeInventory();
-                SchematicCommandUtils.loadSchem(player, node);
+                    SchematicCommandUtils.loadSchem(player, node, -1);
+                } else if (click.isRightClick()) {
+                    List<SWListInv.SWListEntry<Integer>> entries = new ArrayList<>();
+                    List<NodeData> datas = NodeData.get(node);
+                    for (int i = 0; i < datas.size(); i++) {
+                        entries.add(new SWListInv.SWListEntry<>(new SWItem(SWItem.getMaterial(node.getItem()), "§e" + SchematicSystem.MESSAGE.parse("BLANK", player, datas.get(i).getCreatedAt())), i));
+                    }
+
+                    SWListInv<Integer> listInv = new SWListInv<>(player, SchematicSystem.MESSAGE.parse("GUI_LOAD_REVISION_TITLE", player, node.generateBreadcrumbs()), entries, (clickType, revision) -> {
+                        if(revision == null) return;
+                        player.closeInventory();
+                        SchematicCommandUtils.loadSchem(player, node, revision);
+                    });
+                    listInv.setCallback(-999, click2 -> player.closeInventory());
+                    listInv.open();
+                }
             });
         }
 

SchematicSystem/SchematicSystem_Core/src/de/steamwar/schematicsystem/commands/schematiccommand/SchematicCommandUtils.java

@@ -223,6 +223,11 @@ public class SchematicCommandUtils {
         } else {
             SchematicSystem.MESSAGE.sendPrefixless("UTIL_INFO_PARENT", player, node.getParent() == null ? "/" : node.getParentNode().generateBreadcrumbs());
         }
+        player.spigot().sendMessage(
+                new ComponentBuilder(SchematicSystem.MESSAGE.parseToComponent("UTIL_INFO_REVISIONS", false, player, NodeData.getRevisions(node)))
+                        .event(new HoverEvent(HoverEvent.Action.SHOW_TEXT, new TextComponent[] {SchematicSystem.MESSAGE.parseToComponent("UTIL_INFO_ACTION_REVISIONS_HOVER", false, player)}))
+                        .event(new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/schem revisions " + node.generateBreadcrumbs()))
+                        .create());
         SchematicSystem.MESSAGE.sendPrefixless("UTIL_INFO_UPDATED", player, node.getLastUpdate());
         if (!node.isDir()) {
             if(node.getOwner() == user.getId()) {
@@ -357,7 +362,7 @@ public class SchematicCommandUtils {
         PUBLIC_TOGGLED.remove(player);
     }
 
-    public static void loadSchem(Player player, SchematicNode node) {
+    public static void loadSchem(Player player, SchematicNode node, int revision) {
         SteamwarUser user = getUser(player);
         if(BauServerInfo.isBauServer() && BauServerInfo.getOwnerId() != user.getId() &&
                 (Punishment.isPunished(user, Punishment.PunishmentType.NoSchemSharing, punishment ->
@@ -372,11 +377,13 @@ public class SchematicCommandUtils {
         }
 
         try {
-            new SchematicData(node).loadToPlayer(player);
+            new SchematicData(node, revision).loadToPlayer(player);
             SchematicSystem.MESSAGE.send("UTIL_LOAD_DONE", player, node.getName());
             Bukkit.getLogger().log(Level.INFO, "{0} has loaded Schematic {1} {2}", new Object[]{player.getName(), node.getId(), node.getName()});
         } catch (NoClipboardException e) {
             SchematicSystem.MESSAGE.send("UTIL_LOAD_NO_DATA", player);
+        } catch (IllegalArgumentException e) {
+            SchematicSystem.MESSAGE.send("UTIL_LOAD_ILLEGAL_REVISION", player, revision);
         } catch (Exception e) {
             SchematicSystem.MESSAGE.send("UTIL_LOAD_ERROR", player);
             Bukkit.getLogger().log(Level.INFO, e.getMessage(), e);

SchematicSystem/SchematicSystem_Core/src/de/steamwar/schematicsystem/commands/schematiccommand/parts/SavePart.java

@@ -49,11 +49,11 @@ public class SavePart extends SWCommand {
         SchematicSelector selector = new SchematicSelector(player, SchematicSelector.selectSchematicNode(), schematicNode -> {
             if(schematicNode == null || schematicNode.isDir()) {
                 SWAnvilInv anvilInv = new SWAnvilInv(player, SchematicSystem.MESSAGE.parse("COMMAND_ENTER_NAME", player));
-                anvilInv.setCallback(s -> saveSchem(player, schematicNode==null?s:(schematicNode.generateBreadcrumbs() + s), true));
+                anvilInv.setCallback(s -> saveSchem(player, schematicNode==null?s:(schematicNode.generateBreadcrumbs() + s)));
                 anvilInv.setItem(Material.CAULDRON);
                 anvilInv.open();
             } else {
-                saveSchem(player, schematicNode.generateBreadcrumbs(), true);
+                saveSchem(player, schematicNode.generateBreadcrumbs());
             }
         });
         selector.setSingleDirOpen(false);
@@ -62,7 +62,7 @@ public class SavePart extends SWCommand {
 
     @Register("save")
     @Register("s")
-    public void saveSchem(Player player, @AbstractSWCommand.Mapper("stringMapper") String name, @AbstractSWCommand.StaticValue(value = {"", "-f"}, allowISE=true) @AbstractSWCommand.OptionalValue("") boolean overwrite) {
+    public void saveSchem(Player player, @AbstractSWCommand.Mapper("stringMapper") String name) {
         SteamwarUser user = getUser(player);
         if(BauServerInfo.isBauServer() && BauServerInfo.getOwnerId() != user.getId() &&
                 (Punishment.isPunished(user, Punishment.PunishmentType.NoSchemReceiving, punishment ->
@@ -88,9 +88,6 @@ public class SavePart extends SWCommand {
             } else if (!node.getSchemtype().writeable() || node.getOwner() != user.getId()) {
                 SchematicSystem.MESSAGE.send("COMMAND_SAVE_NO_OVERWRITE", player);
                 return;
-            } else if(!overwrite) {
-                SchematicSystem.MESSAGE.send("COMMAND_SAVE_OVERWRITE_CONFIRM", player, SchematicSystem.MESSAGE.parse("COMMAND_SAVE_OVERWRITE_CONFIRM_HOVER", player), new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/schem s " + name + " -f"), node.generateBreadcrumbs());
-                return;
             }
         }
 
@@ -101,7 +98,7 @@ public class SavePart extends SWCommand {
         }
 
         try {
-            new SchematicData(node).saveFromPlayer(player);
+            SchematicData.saveFromPlayer(player, node);
         } catch (NoClipboardException e) {
             SchematicSystem.MESSAGE.send("COMMAND_SAVE_CLIPBOARD_EMPTY", player);
             if (newSchem)

SchematicSystem/SchematicSystem_Core/src/de/steamwar/schematicsystem/commands/schematiccommand/parts/ViewPart.java

@@ -21,13 +21,23 @@ package de.steamwar.schematicsystem.commands.schematiccommand.parts;
 
 import de.steamwar.command.AbstractSWCommand;
 import de.steamwar.command.SWCommand;
+import de.steamwar.schematicsystem.SchematicSystem;
 import de.steamwar.schematicsystem.commands.schematiccommand.GUI;
 import de.steamwar.schematicsystem.commands.schematiccommand.SchematicCommandUtils;
 import de.steamwar.schematicsystem.commands.schematiccommand.SchematicCommand;
+import de.steamwar.sql.NodeData;
 import de.steamwar.sql.SchematicNode;
 import de.steamwar.sql.SteamwarUser;
+import net.md_5.bungee.api.chat.ClickEvent;
+import net.md_5.bungee.api.chat.ComponentBuilder;
+import net.md_5.bungee.api.chat.HoverEvent;
+import net.md_5.bungee.api.chat.TextComponent;
 import org.bukkit.entity.Player;
 
+import java.time.format.DateTimeFormatter;
+import java.time.format.FormatStyle;
+import java.util.List;
+
 import static de.steamwar.schematicsystem.commands.schematiccommand.SchematicCommandUtils.*;
 
 @AbstractSWCommand.PartOf(SchematicCommand.class)
@@ -69,6 +79,25 @@ public class ViewPart extends SWCommand {
         printSchemInfo(player, node);
     }
 
+    @Register("revisions")
+    public void revisions(Player player, @Validator("isSchemValidator") SchematicNode node) {
+        List<NodeData> revisions = NodeData.get(node);
+        if(revisions.isEmpty()) {
+            SchematicSystem.MESSAGE.send("REVISIONS_EMPTY", player);
+            return;
+        }
+
+        SchematicSystem.MESSAGE.send("REVISIONS_TITLE", player);
+        for (int j = Math.max(0, revisions.size() - 10); j < revisions.size(); j++) {
+            player.spigot().sendMessage(
+                    new ComponentBuilder(SchematicSystem.MESSAGE.parseToComponent("REVISIONS_REVISION_NUMBER", false, player, j + 1, revisions.get(j).getCreatedAt()))
+                            .event(new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/schem load " + (node.getOwner() == 0 ? "public " : "") + node.generateBreadcrumbs() + " " + (j + 1)))
+                            .event(new HoverEvent(HoverEvent.Action.SHOW_TEXT, new TextComponent[]{SchematicSystem.MESSAGE.parseToComponent("UTIL_INFO_ACTION_LOAD_HOVER", false, player)}))
+                            .create()
+            );
+        }
+    }
+
     @Register(value = "page", noTabComplete = true)
     public void pageCommand(Player player, int page) {
         cachedSchemList(player, page);
@@ -76,14 +105,14 @@ public class ViewPart extends SWCommand {
 
     @Register({"l", "public"})
     @Register({"load", "public"})
-    public void loadSchemPublic(Player player,  @Validator("isSchemValidator") @Mapper("publicMapper") SchematicNode node) {
+    public void loadSchemPublic(Player player,  @Validator("isSchemValidator") @Mapper("publicMapper") SchematicNode node, @OptionalValue("-1") int revision) {
-        loadSchem(player, node);
+        loadSchem(player, node, revision);
     }
 
     @Register("l")
     @Register("load")
-    public void loadSchem(Player player, @Validator("isSchemValidator") SchematicNode node) {
+    public void loadSchem(Player player, @Validator("isSchemValidator") SchematicNode node, @OptionalValue("-1") int revision) {
-        SchematicCommandUtils.loadSchem(player, node);
+        SchematicCommandUtils.loadSchem(player, node, revision);
     }
 
     @Register("gui")

SpigotCore/SpigotCore_Main/src/de/steamwar/sql/SchematicData.java

@@ -47,11 +47,25 @@ public class SchematicData {
     private final NodeData data;
 
     public SchematicData(SchematicNode node) {
-        this.data = NodeData.get(node);
+        this.data = NodeData.getLatest(node);
         if(node.isDir())
             throw new SecurityException("Node is Directory");
     }
 
+    public SchematicData(SchematicNode node, int revision) {
+        if(node.isDir())
+            throw new SecurityException("Node is Directory");
+
+        if (revision < 1) {
+            this.data = NodeData.getLatest(node);
+        } else {
+            if (NodeData.getRevisions(node) < revision) {
+                throw new IllegalArgumentException("Revision " + revision + " does not exist");
+            }
+            this.data = NodeData.get(node, revision);
+        }
+    }
+
     public Clipboard load() throws IOException, NoClipboardException {
         return WorldEditWrapper.impl.getClipboard(data.schemData(), data.getNodeFormat());
     }
@@ -60,12 +74,12 @@ public class SchematicData {
         WorldEditWrapper.impl.setPlayerClipboard(player, data.schemData(), data.getNodeFormat());
     }
 
-    public void saveFromPlayer(Player player) throws IOException, NoClipboardException {
+    public static void saveFromPlayer(Player player, SchematicNode node) throws IOException, NoClipboardException {
-        data.saveFromStream(WorldEditWrapper.impl.getPlayerClipboard(player), WorldEditWrapper.impl.getNativeFormat());
+        NodeData.saveFromStream(node, WorldEditWrapper.impl.getPlayerClipboard(player), WorldEditWrapper.impl.getNativeFormat());
     }
 
     @Deprecated
-    public void saveFromBytes(byte[] bytes, NodeData.SchematicFormat newFormat) {
+    public static void saveFromBytes(SchematicNode node, byte[] bytes, NodeData.SchematicFormat newFormat) {
-        data.saveFromStream(new ByteArrayInputStream(bytes), newFormat);
+        NodeData.saveFromStream(node, new ByteArrayInputStream(bytes), newFormat);
     }
 }

VelocityCore/src/de/steamwar/velocitycore/discord/listeners/DiscordSchemUpload.java

@@ -94,7 +94,7 @@ public class DiscordSchemUpload extends ListenerAdapter {
                     version = NodeData.SchematicFormat.MCEDIT;
                 }
 
-                NodeData.get(node).saveFromStream(new ByteArrayInputStream(bytes), version);
+                NodeData.saveFromStream(node, new ByteArrayInputStream(bytes), version);
                 sender.system("DC_SCHEMUPLOAD_SUCCESS", name);
             } catch (InterruptedException e) {
                 Thread.currentThread().interrupt();

WebsiteBackend/src/de/steamwar/routes/Schematic.kt

@@ -89,7 +89,7 @@ fun Route.configureSchematic() {
                 return@get
             }
 
-            val data = NodeData.get(node) ?: run {
+            val data = NodeData.getLatest(node) ?: run {
                 call.respond(HttpStatusCode.InternalServerError)
                 return@get
             }
@@ -166,8 +166,7 @@ fun Route.configureSchematic() {
                     } catch (_: Exception) {}
                 }
 
-                val data = NodeData(node.id, version)
+                NodeData.saveFromStream(node, content.inputStream(), version)
-                data.saveFromStream(content.inputStream(), version)
 
                 call.respond(ResponseSchematic(node))
             } catch (e: Exception) {