reworked keyserver preferences with recyclerview

1 files changed, 372 insertions, 0 deletions

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddEditKeyserverDialogFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddEditKeyserverDialogFragment.java
new file mode 100644
index 000000000..321242b2f
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddEditKeyserverDialogFragment.java
@@ -0,0 +1,372 @@
+/*
+ * Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.ui.dialog;
+
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.app.ProgressDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.net.Uri;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.os.Message;
+import android.os.Messenger;
+import android.os.RemoteException;
+import android.support.annotation.NonNull;
+import android.support.v4.app.DialogFragment;
+import android.view.KeyEvent;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.Button;
+import android.widget.CheckBox;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.TextView.OnEditorActionListener;
+
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.util.Log;
+import org.sufficientlysecure.keychain.util.TlsHelper;
+
+public class AddEditKeyserverDialogFragment extends DialogFragment implements OnEditorActionListener {
+    private static final String ARG_MESSENGER = "arg_messenger";
+    private static final String ARG_ACTION = "arg_dialog_action";
+    private static final String ARG_POSITION = "arg_position";
+    private static final String ARG_KEYSERVER = "arg_keyserver";
+
+    public static final int MESSAGE_OKAY = 1;
+    public static final int MESSAGE_VERIFICATION_FAILED = 2;
+
+    public static final String MESSAGE_KEYSERVER = "new_keyserver";
+    public static final String MESSAGE_VERIFIED = "verified";
+    public static final String MESSAGE_FAILURE_REASON = "failure_reason";
+    public static final String MESSAGE_KEYSERVER_DELETED = "keyserver_deleted";
+    public static final String MESSAGE_DIALOG_ACTION = "message_dialog_action";
+    public static final String MESSAGE_EDIT_POSITION = "keyserver_edited_position";
+
+    private Messenger mMessenger;
+    private DialogAction mDialogAction;
+    private int mPosition;
+
+    private EditText mKeyserverEditText;
+    private CheckBox mVerifyKeyserverCheckBox;
+
+    public enum DialogAction {
+        ADD,
+        EDIT
+    }
+
+    public enum FailureReason {
+        INVALID_URL,
+        CONNECTION_FAILED
+    }
+
+    public static AddEditKeyserverDialogFragment newInstance(Messenger messenger,
+                                                             DialogAction action,
+                                                             String keyserver,
+                                                             int position) {
+        AddEditKeyserverDialogFragment frag = new AddEditKeyserverDialogFragment();
+        Bundle args = new Bundle();
+        args.putParcelable(ARG_MESSENGER, messenger);
+        args.putSerializable(ARG_ACTION, action);
+        args.putString(ARG_KEYSERVER, keyserver);
+        args.putInt(ARG_POSITION, position);
+
+        frag.setArguments(args);
+
+        return frag;
+    }
+
+    @NonNull
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        final Activity activity = getActivity();
+
+        mMessenger = getArguments().getParcelable(ARG_MESSENGER);
+        mDialogAction = (DialogAction) getArguments().getSerializable(ARG_ACTION);
+        mPosition = getArguments().getInt(ARG_POSITION);
+
+        CustomAlertDialogBuilder alert = new CustomAlertDialogBuilder(activity);
+
+        LayoutInflater inflater = activity.getLayoutInflater();
+        View view = inflater.inflate(R.layout.add_keyserver_dialog, null);
+        alert.setView(view);
+
+        mKeyserverEditText = (EditText) view.findViewById(R.id.keyserver_url_edit_text);
+        mVerifyKeyserverCheckBox = (CheckBox) view.findViewById(R.id.verify_keyserver_checkbox);
+
+        switch (mDialogAction) {
+            case ADD: {
+                alert.setTitle(R.string.add_keyserver_dialog_title);
+                break;
+            }
+            case EDIT: {
+                alert.setTitle(R.string.edit_keyserver_dialog_title);
+                mKeyserverEditText.setText(getArguments().getString(ARG_KEYSERVER));
+                break;
+            }
+        }
+
+        // we don't want dialog to be dismissed on click for keyserver addition or edit,
+        // thereby requiring the hack seen below and in onStart
+        alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int id) {
+                // we need to have an empty listener to prevent errors on some devices as mentioned
+                // at http://stackoverflow.com/q/13746412/3000919
+                // actual listener set in onStart for adding keyservers or editing them
+            }
+        });
+
+        alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+
+            @Override
+            public void onClick(DialogInterface dialog, int id) {
+                dismiss();
+            }
+        });
+
+        switch (mDialogAction) {
+            case EDIT: {
+                alert.setNeutralButton(R.string.label_keyserver_dialog_delete,
+                        new DialogInterface.OnClickListener() {
+                            @Override
+                            public void onClick(DialogInterface dialog, int which) {
+                                deleteKeyserver(mPosition);
+                            }
+                        });
+                break;
+            }
+            case ADD: {
+                // do nothing
+                break;
+            }
+        }
+
+        // Hack to open keyboard.
+        // This is the only method that I found to work across all Android versions
+        // http://turbomanage.wordpress.com/2012/05/02/show-soft-keyboard-automatically-when-edittext-receives-focus/
+        // Notes: * onCreateView can't be used because we want to add buttons to the dialog
+        //        * opening in onActivityCreated does not work on Android 4.4
+        mKeyserverEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
+            @Override
+            public void onFocusChange(View v, boolean hasFocus) {
+                mKeyserverEditText.post(new Runnable() {
+                    @Override
+                    public void run() {
+                        InputMethodManager imm = (InputMethodManager) getActivity()
+                                .getSystemService(Context.INPUT_METHOD_SERVICE);
+                        imm.showSoftInput(mKeyserverEditText, InputMethodManager.SHOW_IMPLICIT);
+                    }
+                });
+            }
+        });
+        mKeyserverEditText.requestFocus();
+
+        mKeyserverEditText.setImeActionLabel(getString(android.R.string.ok),
+                EditorInfo.IME_ACTION_DONE);
+        mKeyserverEditText.setOnEditorActionListener(this);
+
+        return alert.show();
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        AlertDialog addKeyserverDialog = (AlertDialog) getDialog();
+        if (addKeyserverDialog != null) {
+            Button positiveButton = addKeyserverDialog.getButton(Dialog.BUTTON_POSITIVE);
+            positiveButton.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    // behaviour same for edit and add
+                    String keyserverUrl = mKeyserverEditText.getText().toString();
+                    if (mVerifyKeyserverCheckBox.isChecked()) {
+                        verifyConnection(keyserverUrl);
+                    } else {
+                        dismiss();
+                        // return unverified keyserver back to activity
+                        keyserverEdited(keyserverUrl, false);
+                    }
+                }
+            });
+        }
+    }
+
+    public void keyserverEdited(String keyserver, boolean verified) {
+        dismiss();
+        Bundle data = new Bundle();
+        data.putSerializable(MESSAGE_DIALOG_ACTION, mDialogAction);
+        data.putString(MESSAGE_KEYSERVER, keyserver);
+        data.putBoolean(MESSAGE_VERIFIED, verified);
+
+        if (mDialogAction == DialogAction.EDIT) {
+            data.putInt(MESSAGE_EDIT_POSITION, mPosition);
+        }
+
+        sendMessageToHandler(MESSAGE_OKAY, data);
+    }
+
+    public void deleteKeyserver(int position) {
+        dismiss();
+        Bundle data = new Bundle();
+        data.putSerializable(MESSAGE_DIALOG_ACTION, DialogAction.EDIT);
+        data.putInt(MESSAGE_EDIT_POSITION, position);
+        data.putBoolean(MESSAGE_KEYSERVER_DELETED, true);
+
+        sendMessageToHandler(MESSAGE_OKAY, data);
+    }
+
+    public void verificationFailed(FailureReason reason) {
+        Bundle data = new Bundle();
+        data.putSerializable(MESSAGE_FAILURE_REASON, reason);
+
+        sendMessageToHandler(MESSAGE_VERIFICATION_FAILED, data);
+    }
+
+    public void verifyConnection(String keyserver) {
+
+        new AsyncTask<String, Void, FailureReason>() {
+            ProgressDialog mProgressDialog;
+            String mKeyserver;
+
+            @Override
+            protected void onPreExecute() {
+                mProgressDialog = new ProgressDialog(getActivity());
+                mProgressDialog.setMessage(getString(R.string.progress_verifying_keyserver_url));
+                mProgressDialog.setCancelable(false);
+                mProgressDialog.show();
+            }
+
+            @Override
+            protected FailureReason doInBackground(String... keyservers) {
+                mKeyserver = keyservers[0];
+                FailureReason reason = null;
+                try {
+                    // replace hkps/hkp scheme and reconstruct Uri
+                    Uri keyserverUri = Uri.parse(mKeyserver);
+                    String scheme = keyserverUri.getScheme();
+                    String schemeSpecificPart = keyserverUri.getSchemeSpecificPart();
+                    String fragment = keyserverUri.getFragment();
+                    if (scheme == null) {
+                        throw new MalformedURLException();
+                    }
+                    if ("hkps".equalsIgnoreCase(scheme)) {
+                        scheme = "https";
+                    } else if ("hkp".equalsIgnoreCase(scheme)) {
+                        scheme = "http";
+                    }
+                    URI newKeyserver = new URI(scheme, schemeSpecificPart, fragment);
+
+                    Log.d(Constants.TAG, "Converted URL" + newKeyserver);
+
+                    // just see if we can get a connection, then immediately close
+                    TlsHelper.openConnection(newKeyserver.toURL()).getInputStream().close();
+                } catch (TlsHelper.TlsHelperException e) {
+                    reason = FailureReason.CONNECTION_FAILED;
+                } catch (MalformedURLException | URISyntaxException e) {
+                    Log.w(Constants.TAG, "Invalid keyserver URL entered by user.");
+                    reason = FailureReason.INVALID_URL;
+                } catch (IOException e) {
+                    Log.w(Constants.TAG, "Could not connect to entered keyserver url");
+                    reason = FailureReason.CONNECTION_FAILED;
+                }
+                return reason;
+            }
+
+            @Override
+            protected void onPostExecute(FailureReason failureReason) {
+                mProgressDialog.dismiss();
+                if (failureReason == null) {
+                    keyserverEdited(mKeyserver, true);
+                } else {
+                    verificationFailed(failureReason);
+                }
+            }
+        }.execute(keyserver);
+    }
+
+    @Override
+    public void onDismiss(DialogInterface dialog) {
+        super.onDismiss(dialog);
+
+        // hide keyboard on dismiss
+        hideKeyboard();
+    }
+
+    private void hideKeyboard() {
+        if (getActivity() == null) {
+            return;
+        }
+        InputMethodManager inputManager = (InputMethodManager) getActivity()
+                .getSystemService(Context.INPUT_METHOD_SERVICE);
+
+        //check if no view has focus:
+        View v = getActivity().getCurrentFocus();
+        if (v == null)
+            return;
+
+        inputManager.hideSoftInputFromWindow(v.getWindowToken(), 0);
+    }
+
+    /**
+     * Associate the "done" button on the soft keyboard with the okay button in the view
+     */
+    @Override
+    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
+        if (EditorInfo.IME_ACTION_DONE == actionId) {
+            AlertDialog dialog = ((AlertDialog) getDialog());
+            Button bt = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
+
+            bt.performClick();
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Send message back to handler which is initialized in a activity
+     *
+     * @param what Message integer you want to send
+     */
+    private void sendMessageToHandler(Integer what, Bundle data) {
+        Message msg = Message.obtain();
+        msg.what = what;
+        if (data != null) {
+            msg.setData(data);
+        }
+
+        try {
+            mMessenger.send(msg);
+        } catch (RemoteException e) {
+            Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
+        } catch (NullPointerException e) {
+            Log.w(Constants.TAG, "Messenger is null!", e);
+        }
+    }
+}