SecureIot_AndroidClient/app/src/main/java/com/skulixlabs/iotcontrol/SettingsFragment.java

package com.skulixlabs.iotcontrol;

import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Toast;

import androidx.annotation.ColorInt;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.DialogFragment;
import androidx.fragment.app.Fragment;
import androidx.navigation.Navigation;
import androidx.preference.ListPreference;
import androidx.preference.Preference;
import androidx.preference.PreferenceFragmentCompat;
import androidx.preference.SwitchPreferenceCompat;

import com.skulixlabs.iotcontrol.util.jackson.JsonUtils;

import java.io.InputStream;

import static android.content.ClipDescription.MIMETYPE_TEXT_PLAIN;
import static com.skulixlabs.iotcontrol.util.jackson.JsonUtils.REQUEST_READ_FILE;
import static com.skulixlabs.iotcontrol.util.jackson.JsonUtils.REQUEST_READ_STORAGE;

/** Preference screens does not currently support Data Binding
  * because it is not a xml layout file
  */
public class SettingsFragment extends PreferenceFragmentCompat {
    @ColorInt public static Integer primaryColor = null;

    public SettingsFragment() {
    }

    @Override
    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
        setPreferencesFromResource(R.xml.root_preferences, rootKey);

        ((Preference) findPreference("load_json_commands")).setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
            @Override
            public boolean onPreferenceClick(Preference preference) {
                showImportDialog();
                return true;
            };
        });

        ((SwitchPreferenceCompat) findPreference("dark_theme")).setOnPreferenceChangeListener(updateThemeListener(themeAction()));
        ((ListPreference) findPreference("theme_color")).setOnPreferenceChangeListener(updateThemeListener(themeAction()));

        ((Preference) findPreference("version")).setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
            @Override
            public boolean onPreferenceClick(Preference preference) {
                Navigation.findNavController(getActivity(), R.id.my_nav_host_fragment).navigate(R.id.action_settingsFragment_to_aboutFragment);
                return true;
            };
        });

        shouldShowImportDialog();
    }

    private void shouldShowImportDialog() {
        if (SettingsFragmentArgs.fromBundle(getArguments()).getImportCmds()) {
            getArguments().putBoolean("importCmds", false);
            showImportDialog();
        }
    }

    private void showImportDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        LayoutInflater inflater = requireActivity().getLayoutInflater();

        // Inflate and set the layout for the dialog
        // Pass null as the parent view because its going in the dialog layout
        builder.setView(inflater.inflate(R.layout.dialog_import_method, null));
        final AlertDialog alertDialog = builder.create();
        alertDialog.show();

        alertDialog.findViewById(R.id.btnFromClipboard).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ClipboardManager clipboard = (ClipboardManager) getActivity().getSystemService(Context.CLIPBOARD_SERVICE);
                String json = "";

                // If the clipboard doesn't contain data, else start the process after validation
                if (!(clipboard.hasPrimaryClip()) || !(clipboard.getPrimaryClipDescription().hasMimeType(MIMETYPE_TEXT_PLAIN))) {
                    Toast.makeText(getActivity(), "Not valid!", Toast.LENGTH_SHORT).show();
                    ((Preference) findPreference("load_json_commands")).setIcon(R.drawable.ic_error_outline_red_48dp);
                } else {
                    try {
                        ClipData.Item item = clipboard.getPrimaryClip().getItemAt(0);           // Since the clipboard contains plain text.
                        json = item.getText().toString();                                             // Gets the clipboard as text.
                        new JsonUtils().saveCommands(getActivity(), json);
                        ((Preference) findPreference("load_json_commands")).setIcon(R.drawable.ic_check_green_48dp);
                        alertDialog.cancel();
                    } catch (Exception e) {
                        Toast.makeText(getActivity(), "Not valid!", Toast.LENGTH_SHORT).show();
                        ((Preference) findPreference("load_json_commands")).setIcon(R.drawable.ic_error_outline_red_48dp);
                    }
                }
            }
        });

        alertDialog.findViewById(R.id.btnFromFile).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                selectFile();
            }
        });
    }

    public Runnable themeAction() {
        return new Runnable() {
            @Override
            public void run() {
                primaryColor = null;
                ((MainActivity) getActivity()).theme();
                getActivity().recreate();
            }
        };
    }

    public static synchronized int getPrimaryColor(Context context) {
        if (primaryColor == null) {
            TypedValue typedValue = new TypedValue();
            context.getTheme().resolveAttribute(R.attr.colorPrimary, typedValue, true);
            primaryColor = typedValue.data;
        }
        return primaryColor;
    }

    private String FRAGMENT_DIALOG = "dialog";

    public void selectFile() {
        if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.READ_EXTERNAL_STORAGE)
                != PackageManager.PERMISSION_GRANTED) {
            requestReadStoragePermission();
            return;
        }
        openFileManager();
    }

    private void openFileManager() {
        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        intent.setType("*/*");
        startActivityForResult(intent, REQUEST_READ_FILE);
    }

    private void requestReadStoragePermission() {
        if (shouldShowRequestPermissionRationale(Manifest.permission.READ_EXTERNAL_STORAGE)) {
            new ConfirmationDialog().show(getChildFragmentManager(), FRAGMENT_DIALOG);
        } else {
            requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, REQUEST_READ_STORAGE);
        }
    }

    public static class ConfirmationDialog extends DialogFragment {
        @NonNull
        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            final Fragment parent = getParentFragment();
            return new AlertDialog.Builder(getActivity())
                    .setMessage(R.string.request_read_external_storage_permission)
                    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            parent.requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
                                    REQUEST_READ_STORAGE);
                        }
                    })
                    .create();
        }
    }

    public static class ErrorDialog extends DialogFragment {

        private static final String ARG_MESSAGE = "message";

        public static ErrorDialog newInstance(String message) {
            ErrorDialog dialog = new ErrorDialog();
            Bundle args = new Bundle();
            args.putString(ARG_MESSAGE, message);
            dialog.setArguments(args);
            return dialog;
        }

        @NonNull
        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            final Activity activity = getActivity();
            return new AlertDialog.Builder(activity)
                    .setMessage(getArguments().getString(ARG_MESSAGE))
                    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int i) {
                            getDialog().cancel();
                        }
                    })
                    .create();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
                                           @NonNull int[] grantResults) {
        if (requestCode == REQUEST_READ_STORAGE) {
            if (grantResults.length != 1 || grantResults[0] != PackageManager.PERMISSION_GRANTED) {     // one requested permission, one result expected (in results array)
                ErrorDialog.newInstance(getString(R.string.request_read_external_storage_permission))
                        .show(getChildFragmentManager(), FRAGMENT_DIALOG);
            } else {
                openFileManager();
            }
        } else {
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        if (requestCode == REQUEST_READ_FILE && resultCode == Activity.RESULT_OK) {
            if (data != null) {
                Uri uri = data.getData();

                try {
                    InputStream is = getActivity().getContentResolver().openInputStream(uri);
                    JsonUtils jsonUtils = new JsonUtils();
                    jsonUtils.saveCommands(getActivity(), is);
                    ((Preference) findPreference("load_json_commands")).setIcon(R.drawable.ic_check_green_48dp);
                    System.out.println();
                } catch (Exception e) {
                    ((Preference) findPreference("load_json_commands")).setIcon(R.drawable.ic_error_outline_red_48dp);
                    e.printStackTrace();
                }
            }
        }
    }

    public static Preference.OnPreferenceChangeListener updateThemeListener(final Runnable action) {
        return new Preference.OnPreferenceChangeListener() {
            @Override
            public boolean onPreferenceChange(Preference preference, Object newValue) {
                action.run();
                return true;
            }
        };
    }
}