1 files changed, 17 insertions, 0 deletions
diff --git a/src/main/java/moe/nea/zwirn/Zwirn.java b/src/main/java/moe/nea/zwirn/Zwirn.java
new file mode 100644
index 0000000..db616d7
--- /dev/null
+++ b/src/main/java/moe/nea/zwirn/Zwirn.java
@@ -0,0 +1,17 @@
+package moe.nea.zwirn;
+
+import net.fabricmc.stitch.commands.tinyv2.TinyFile;
+import org.jetbrains.annotations.NotNull;
+
+public class Zwirn {
+    public static @NotNull TinyFile mergeTinyFile(
+            @NotNull TinyFile base, @NotNull TinyFile overlay,
+            @NotNull String sharedNamespace) {
+        var namespaces = base.getHeader().getNamespaces();
+        if (!namespaces.containsAll(overlay.getHeader().getNamespaces()))
+            throw new IllegalArgumentException("When merging a tiny file, overlay may not introduce a new namespace.");
+        if (!overlay.getHeader().getNamespaces().contains(sharedNamespace))
+            throw new IllegalArgumentException("When merging a tiny file, overlay must contain the shared namespace");
+        return new TinyMerger(base, overlay, sharedNamespace).merge();
+    }
+}