Split commands into separate classes

src/main/java/org/asamk/signal/commands/QuitGroupCommand.java

@@ -0,0 +1,55 @@
+package org.asamk.signal.commands;
+
+import net.sourceforge.argparse4j.inf.Namespace;
+import net.sourceforge.argparse4j.inf.Subparser;
+import org.asamk.signal.GroupIdFormatException;
+import org.asamk.signal.GroupNotFoundException;
+import org.asamk.signal.NotAGroupMemberException;
+import org.asamk.signal.manager.Manager;
+import org.asamk.signal.util.Util;
+import org.whispersystems.signalservice.api.push.exceptions.EncapsulatedExceptions;
+
+import java.io.IOException;
+
+import static org.asamk.signal.util.ErrorUtils.*;
+
+public class QuitGroupCommand implements LocalCommand {
+
+    @Override
+    public void attachToSubparser(final Subparser subparser) {
+        subparser.addArgument("-g", "--group")
+                .required(true)
+                .help("Specify the recipient group ID.");
+    }
+
+    @Override
+    public int handleCommand(final Namespace ns, final Manager m) {
+        if (!m.isRegistered()) {
+            System.err.println("User is not registered.");
+            return 1;
+        }
+
+        try {
+            m.sendQuitGroupMessage(Util.decodeGroupId(ns.getString("group")));
+            return 0;
+        } catch (IOException e) {
+            handleIOException(e);
+            return 3;
+        } catch (EncapsulatedExceptions e) {
+            handleEncapsulatedExceptions(e);
+            return 3;
+        } catch (AssertionError e) {
+            handleAssertionError(e);
+            return 1;
+        } catch (GroupNotFoundException e) {
+            handleGroupNotFoundException(e);
+            return 1;
+        } catch (NotAGroupMemberException e) {
+            handleNotAGroupMemberException(e);
+            return 1;
+        } catch (GroupIdFormatException e) {
+            handleGroupIdFormatException(e);
+            return 1;
+        }
+    }
+}