Add compose, convert, and invert commands (#152)

* Add compose and invert commands and add support for conversion to tiny mappings

* Improvements suggested by liach

* Use Translator to get right entries

1 files changed, 36 insertions, 0 deletions

diff --git a/src/main/java/cuchaz/enigma/command/InvertMappingsCommand.java b/src/main/java/cuchaz/enigma/command/InvertMappingsCommand.java
new file mode 100644
index 0000000..bfe8308
--- /dev/null
+++ b/src/main/java/cuchaz/enigma/command/InvertMappingsCommand.java
@@ -0,0 +1,36 @@
+package cuchaz.enigma.command;
+
+import cuchaz.enigma.throwables.MappingParseException;
+import cuchaz.enigma.translation.mapping.EntryMapping;
+import cuchaz.enigma.translation.mapping.tree.EntryTree;
+import cuchaz.enigma.utils.Utils;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+public class InvertMappingsCommand extends Command {
+    public InvertMappingsCommand() {
+        super("invert-mappings");
+    }
+
+    @Override
+    public String getUsage() {
+        return "<source-format> <source> <result-format> <result>";
+    }
+
+    @Override
+    public boolean isValidArgument(int length) {
+        return length == 4;
+    }
+
+    @Override
+    public void run(String... args) throws IOException, MappingParseException {
+        EntryTree<EntryMapping> source = MappingCommandsUtil.read(args[0], Paths.get(args[1]));
+        EntryTree<EntryMapping> result = MappingCommandsUtil.invert(source);
+
+        Path output = Paths.get(args[3]);
+        Utils.delete(output);
+        MappingCommandsUtil.write(result, args[2], output);
+    }
+}