Added a view to main activity layout to host Snackbars, Configurations menu is mostly functional, misc.

app/build.gradle

@@ -28,6 +28,7 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'com.google.android.material:material:1.0.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.coordinatorlayout:coordinatorlayout:1.1.0'
     implementation 'androidx.vectordrawable:vectordrawable:1.1.0'
     implementation 'androidx.navigation:navigation-fragment:2.1.0'
     implementation 'androidx.navigation:navigation-ui:2.1.0'

app/src/main/java/org/timecrafters/TimeCraftersConfigurationTool/backend/Backend.java

@@ -33,11 +33,17 @@ import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.FilenameFilter;
 import java.io.IOException;
+import java.net.URI;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
 import java.util.ArrayList;
 import java.util.Date;
+import java.util.HashMap;
 
 public class Backend {
     private static final String TAG = "Backend";
+    static private HashMap<String, Object> storage = new HashMap<>();
     static private Backend instance;
     private TACNET tacnet;
     private Server server;
@@ -46,6 +52,10 @@ public class Backend {
     private Settings settings;
     private boolean configChanged, settingsChanged;
 
+    public static HashMap<String, Object> getStorage() {
+        return storage;
+    }
+
     public Backend() {
         if (Backend.instance() != null) {
             throw(new RuntimeException("Backend instance already exists!"));
@@ -114,10 +124,14 @@ public class Backend {
         saveConfig();
     }
 
-    public boolean isConfigChanged() { return configChanged; }
+    public boolean hasConfigChanged() { return configChanged; }
+
+    public String configPath(String name) {
+        return TAC.CONFIGS_PATH + File.separator + name + ".json";
+    }
 
     public void loadConfig(String name) {
-        String path = "" + TAC.CONFIGS_PATH + File.separator + name + ".json";
+        String path = configPath(name);
         File file = new File(path);
 
         if (file.exists() && file.isFile()) {
@@ -129,12 +143,38 @@ public class Backend {
     public boolean saveConfig() {
         if (config == null) { return false; }
 
-        final String path = "" + TAC.CONFIGS_PATH + File.separator + getConfig().getName() + ".json";
+        final String path = configPath(getConfig().getName());
         configChanged = false;
 
         return writeToFile(path, gsonForConfig().toJson(config));
     }
 
+    public boolean moveConfig(String oldName, String newName) {
+        final String oldPath = configPath(oldName);
+        final String newPath = configPath(newName);
+
+        final File oldFile = new File(oldPath);
+        final File newFile = new File(newPath);
+
+        if (!oldFile.exists() || !oldFile.isFile()) {
+            Log.e(TAG, "moveConfig: Can not move config file \"" + oldPath + "\" does not exists!");
+            return false;
+        }
+
+        if (newFile.exists() && newFile.isFile()) {
+            Log.e(TAG, "moveConfig: Config file \"" + newPath + "\" already exists!");
+            return false;
+        }
+
+        return oldFile.renameTo(newFile);
+    }
+
+    public boolean deleteConfig(String name) {
+        File file = new File(configPath(name));
+
+        return file.delete();
+    }
+
     public void uploadConfig() {
         if (config != null && tacnet.isConnected()) {
             String json = "";
@@ -149,7 +189,7 @@ public class Backend {
     }
 
     public void writeNewConfig(String name) {
-        String path = TAC.CONFIGS_PATH + File.separator + name + ".json";
+        String path = configPath(name);
         File file = new File(path);
 
         Config config = new Config(name);

app/src/main/java/org/timecrafters/TimeCraftersConfigurationTool/dialogs/ConfigurationDialog.java

@@ -18,6 +18,7 @@ import java.util.regex.Pattern;
 
 public class ConfigurationDialog extends TimeCraftersDialog {
     private static final String TAG = "ConfigurationDialog";
+    private String configName;
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
@@ -31,7 +32,14 @@ public class ConfigurationDialog extends TimeCraftersDialog {
         final Button cancel = view.findViewById(R.id.cancel);
         final Button mutate = view.findViewById(R.id.mutate);
 
+        if (getArguments() != null) {
+            configName = getArguments().getString("config_name");
+            title.setText("Editing " + configName);
+            name.setText(configName);
+            mutate.setText(getResources().getString(R.string.dialog_update));
+        } else {
             title.setText("Create Configuration");
+        }
         cancel.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -39,16 +47,20 @@ public class ConfigurationDialog extends TimeCraftersDialog {
             }
         });
 
-//        mutate.setText(getResources().getString(R.string.dialog_update));
         mutate.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                String configName = name.getText().toString();
+                final String newConfigName = name.getText().toString();
 
-                if (isValid(configName)) {
+                if (isValid(newConfigName)) {
-                    Backend.instance().writeNewConfig(configName);
+                    if (configName != null) {
+                        Backend.instance().moveConfig(configName, newConfigName);
+                    } else {
+                        Backend.instance().writeNewConfig(newConfigName);
+                    }
                     dismiss();
                 } else {
+                    // TODO: Show friendly error message
                     Log.d(TAG, "onClick: InValid");
                 }
             }

app/src/main/java/org/timecrafters/TimeCraftersConfigurationTool/dialogs/ConfirmationDialog.java

@@ -1,6 +1,11 @@
 package org.timecrafters.TimeCraftersConfigurationTool.dialogs;
 
+import android.graphics.Color;
+import android.graphics.Typeface;
+import android.graphics.drawable.ColorDrawable;
+import android.os.Build;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -10,25 +15,30 @@ import android.widget.TextView;
 
 import androidx.constraintlayout.widget.ConstraintLayout;
 
+import com.google.android.material.resources.TextAppearance;
+
 import org.timecrafters.TimeCraftersConfigurationTool.R;
+import org.timecrafters.TimeCraftersConfigurationTool.backend.Backend;
 import org.timecrafters.TimeCraftersConfigurationTool.library.TimeCraftersDialog;
 
 public class ConfirmationDialog extends TimeCraftersDialog {
     private String title, message;
     private Runnable action;
 
-    public ConfirmationDialog() {}
-
-    public ConfirmationDialog(String title, String message, Runnable action) {
-        this.title = title;
-        this.message = message;
-        this.action = action;
-    }
-
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         View root = super.onCreateView(inflater, container, savedInstanceState);
 
+        if (getArguments() != null) {
+            this.title = getArguments().getString("title", "Are You Sure?");
+            this.message = getArguments().getString("message", "");
+
+            final String actionKey = getArguments().getString("action", null);
+            if (actionKey != null && Backend.getStorage().containsKey(actionKey)) {
+                this.action = (Runnable) Backend.getStorage().get(actionKey);
+            }
+        }
+
         final TextView title = root.findViewById(R.id.dialogTitle);
         final ConstraintLayout titlebar = root.findViewById(R.id.titlebar);
         final LinearLayout view = root.findViewById(R.id.dialogContent);
@@ -37,13 +47,29 @@ public class ConfirmationDialog extends TimeCraftersDialog {
         final Button cancel = root.findViewById(R.id.cancel);
         final Button confirm = root.findViewById(R.id.confirm);
 
+        if (getArguments() != null && getArguments().getBoolean("extreme_danger", false)) {
+            titlebar.setBackgroundColor(getResources().getColor(R.color.dialogError));
+            getDialog().getWindow().setDimAmount(0.8f);
+            cancel.setTypeface(cancel.getTypeface(), Typeface.BOLD);
+        } else {
             titlebar.setBackgroundColor(getResources().getColor(R.color.dialogAlert));
+        }
         title.setText(this.title);
         messageView.setText(message);
 
+        cancel.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                dismiss();
+            }
+        });
         confirm.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
+                if (action != null) {
+                    action.run();
+                }
+
                 dismiss();
             }
         });

app/src/main/java/org/timecrafters/TimeCraftersConfigurationTool/ui/editor/GroupsFragment.java

@@ -104,7 +104,12 @@ public class GroupsFragment extends TimeCraftersFragment {
             delete.setOnClickListener(new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {
-                    ConfirmationDialog dialog = new ConfirmationDialog("Are you sure?", "Really delete " + group.name + "?", null);
+                    ConfirmationDialog dialog = new ConfirmationDialog();
+                    Bundle bundle = new Bundle();
+                    bundle.putString("title", "Are you sure?");
+                    bundle.putString("message", "Delete group " + group.name + "?");
+                    dialog.setArguments(bundle);
+
                     dialog.show(getFragmentManager(), null);
                 }
             });

app/src/main/java/org/timecrafters/TimeCraftersConfigurationTool/ui/settings/configurations/ConfigurationsFragment.java

@@ -1,28 +1,38 @@
 package org.timecrafters.TimeCraftersConfigurationTool.ui.settings.configurations;
 
+import android.content.BroadcastReceiver;
+import android.content.Context;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Button;
+import android.widget.ImageButton;
 import android.widget.LinearLayout;
 import android.widget.ScrollView;
 
 import androidx.annotation.NonNull;
 
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
 
 import org.timecrafters.TimeCraftersConfigurationTool.R;
 import org.timecrafters.TimeCraftersConfigurationTool.backend.Backend;
 import org.timecrafters.TimeCraftersConfigurationTool.dialogs.ConfigurationDialog;
+import org.timecrafters.TimeCraftersConfigurationTool.dialogs.ConfirmationDialog;
 import org.timecrafters.TimeCraftersConfigurationTool.library.TimeCraftersFragment;
 
 public class ConfigurationsFragment extends TimeCraftersFragment {
+    private LayoutInflater inflater;
+    private LinearLayout configsContainer;
+    private View root;
+
     public View onCreateView(@NonNull LayoutInflater inflater,
                              ViewGroup container, Bundle savedInstanceState) {
-        final View root = inflater.inflate(R.layout.fragment_configuration, container, false);
+        this.inflater = inflater;
+        this.root = inflater.inflate(R.layout.fragment_configuration, container, false);
         final ScrollView scrollview = root.findViewById(R.id.scrollview);
-        final LinearLayout configsContainer = root.findViewById(R.id.container);
+        configsContainer = root.findViewById(R.id.container);
         final FloatingActionButton actionButton = root.findViewById(R.id.actionButton);
 
         floatingActionButtonAutoHide(actionButton, scrollview);
@@ -34,8 +44,16 @@ public class ConfigurationsFragment extends TimeCraftersFragment {
             }
         });
 
+        populateConfigFiles();
+
+        return root;
+    }
+
+    private void populateConfigFiles() {
+        configsContainer.removeAllViews();
+
         int i = 0;
-        for (String configFile : Backend.instance().configsList()) {
+        for (final String configFile : Backend.instance().configsList()) {
             final String config = configFile.replace(".json", "");
             View view = inflater.inflate(R.layout.fragment_part_configuration, null);
 
@@ -45,21 +63,62 @@ public class ConfigurationsFragment extends TimeCraftersFragment {
                 view.setBackgroundColor(getResources().getColor(R.color.list_odd));
             }
 
-            Button configName = view.findViewById(R.id.name);
+            final Button configName = view.findViewById(R.id.name);
+            final ImageButton rename = view.findViewById(R.id.rename);
+            final ImageButton delete = view.findViewById(R.id.delete);
             configName.setText(config);
             configName.setOnClickListener(new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {
+                    if (Backend.instance().getSettings().config.equals(config)) {
+                        return;
+                    }
+
                     Backend.instance().getSettings().config = config;
                     Backend.instance().loadConfig(config);
                     Backend.instance().saveSettings();
+
+                    View snackbarHost = getActivity().findViewById(R.id.snackbar_host);
+                    Snackbar.make(snackbarHost, "Loaded config: " + config, Snackbar.LENGTH_LONG).show();
+                }
+            });
+
+            rename.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    ConfigurationDialog dialog = new ConfigurationDialog();
+                    Bundle bundle = new Bundle();
+                    bundle.putString("config_name", config);
+                    dialog.setArguments(bundle);
+                    dialog.show(getFragmentManager(), null);
+                }
+            });
+
+            delete.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    ConfirmationDialog dialog = new ConfirmationDialog();
+                    Bundle bundle = new Bundle();
+                    final String actionKey = "delete_configuration";
+                    bundle.putString("title", "Are you sure?");
+                    bundle.putString("message", "Destroy configuration " + config + "?");
+                    bundle.putString("action", actionKey);
+                    bundle.putBoolean("extreme_danger", true);
+                    Runnable action = new Runnable() {
+                        @Override
+                        public void run() {
+                            Backend.instance().deleteConfig(config);
+                        }
+                    } ;
+                    Backend.getStorage().put(actionKey, action);
+                    dialog.setArguments(bundle);
+
+                    dialog.show(getFragmentManager(), null);
                 }
             });
 
             i++;
             configsContainer.addView(view);
         }
-
-        return root;
     }
 }

app/src/main/res/layout/activity_main.xml

@@ -20,6 +20,13 @@
         app:layout_constraintVertical_bias="0.0"
         app:navGraph="@navigation/mobile_navigation" />
 
+    <androidx.coordinatorlayout.widget.CoordinatorLayout
+        android:id="@+id/snackbar_host"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toBottomOf="@id/nav_host_fragment"
+        app:layout_constraintStart_toStartOf="@id/nav_host_fragment" />
+
     <com.google.android.material.bottomnavigation.BottomNavigationView
         android:id="@+id/nav_view"
         android:layout_width="0dp"