1 files changed, 74 insertions, 0 deletions
diff --git a/src/main/java/io/github/moulberry/notenoughupdates/recipes/RecipeHistory.java b/src/main/java/io/github/moulberry/notenoughupdates/recipes/RecipeHistory.java
new file mode 100644
index 00000000..c4a0f6e4
--- /dev/null
+++ b/src/main/java/io/github/moulberry/notenoughupdates/recipes/RecipeHistory.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2022 NotEnoughUpdates contributors
+ *
+ * This file is part of NotEnoughUpdates.
+ *
+ * NotEnoughUpdates is free software: you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * NotEnoughUpdates is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with NotEnoughUpdates. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package io.github.moulberry.notenoughupdates.recipes;
+
+import net.minecraft.client.gui.GuiScreen;
+
+import java.util.ArrayList;
+
+public class RecipeHistory {
+
+	private static final int MAX_HISTORY_SIZE = 50;
+
+	private static ArrayList<GuiScreen> history = new ArrayList<>();
+	private static int historyIndex = 0;
+
+	public static void add(GuiScreen recipe) {
+		if (history.size() == MAX_HISTORY_SIZE) {
+			history.remove(0);
+			historyIndex--;
+		} else {
+			if (history.size() == 0) {
+				history.add(recipe);
+			} else {
+				if (historyIndex < history.size() - 1) {
+					history = new ArrayList<>(history.subList(0, historyIndex + 1));
+				}
+				history.add(recipe);
+				historyIndex++;
+			}
+		}
+	}
+
+	public static GuiScreen getPrevious() {
+		if (history.size() > 0) {
+			if (historyIndex - 1 < 0) {
+				return null;
+			}
+			historyIndex--;
+			return history.get(historyIndex);
+		}
+		return null;
+	}
+
+	public static GuiScreen getNext() {
+		if (historyIndex < history.size() - 1) {
+			historyIndex++;
+			return history.get(historyIndex);
+		}
+		return null;
+	}
+
+	public static void clear() {
+		history = new ArrayList<>();
+		historyIndex = 0;
+	}
+
+}