app/src/syncbase/java/io/v/todos/sharing/ShareListDialogFragment.java - release.projects.todos - Git at Google

 // Copyright 2016 The Vanadium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.

 package io.v.todos.sharing;

 import android.app.Dialog;
 import android.app.DialogFragment;
 import android.app.FragmentManager;
 import android.content.DialogInterface;
 import android.graphics.Paint;
 import android.os.Bundle;
 import android.support.v7.app.AlertDialog;
 import android.support.v7.widget.RecyclerView;
 import android.view.KeyEvent;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.inputmethod.EditorInfo;
 import android.widget.EditText;
 import android.widget.TextView;

 import com.google.common.collect.Iterables;
 import com.google.common.util.concurrent.FutureCallback;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;

 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;

 import javax.annotation.Nullable;

 import io.v.todos.R;
 import io.v.todos.persistence.syncbase.SyncbasePersistence;
 import io.v.v23.InputChannelCallback;
 import io.v.v23.InputChannels;
 import io.v.v23.context.VContext;
 import io.v.v23.discovery.Update;
 import io.v.v23.verror.VException;

 /**
  * The share dialog contains two recycler views. The top one shows the existing items, and the
  * bottom shows ones that are nearby but not shared to yet. There's also a freeform text box to
  * allow entry of any value. Confirming this dialog sends the set of added and removed emails. Tap
  * to add/remove.
  */
 public class ShareListDialogFragment extends DialogFragment {
     public static final String FRAGMENT_TAG = ShareListDialogFragment.class.getSimpleName();

     public static ShareListDialogFragment find(FragmentManager fragmentManager) {
         return (ShareListDialogFragment) fragmentManager.findFragmentByTag(FRAGMENT_TAG);
     }

     private Set<String> mRemoved;
     private List<String> mNearby = new ArrayList<>();
     private ArrayList<String> mTyped;
     private Set<String> mAdded;

     private static final String
             REMOVED_KEY = "removedShares",
             TYPED_KEY = "explicitShares",
             ADDED_KEY = "addedShares";

     private ContactAdapter mAlreadyAdapter, mPossibleAdapter;

     private VContext mScanContext;

     private ShareListMenuFragment getParent() {
         return ((ShareListMenuFragment) getParentFragment());
     }

     @Override
     public void onDestroyView() {
         mScanContext.cancel();
         super.onDestroyView();
     }

     @Override
     public void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);

         outState.putStringArrayList(REMOVED_KEY, new ArrayList<>(mRemoved));
         outState.putStringArrayList(TYPED_KEY, mTyped);
         outState.putStringArrayList(ADDED_KEY, new ArrayList<>(mAdded));
     }

     @Override
     public Dialog onCreateDialog(Bundle savedInstanceState) {
         View view = getActivity().getLayoutInflater().inflate(R.layout.sharing, null);

         if (savedInstanceState == null) {
             mRemoved = new HashSet<>();
             mAdded = new HashSet<>();
             mTyped = new ArrayList<>();
         } else {
             mRemoved = new HashSet<>(savedInstanceState.getStringArrayList(REMOVED_KEY));
             mAdded = new HashSet<>(savedInstanceState.getStringArrayList(ADDED_KEY));
             mTyped = savedInstanceState.getStringArrayList(TYPED_KEY);
         }

         mAlreadyAdapter = new ContactAdapter(getParent().getSharedTo(), mRemoved, true);
         RecyclerView rvAlready = (RecyclerView) view.findViewById(R.id.recycler_already);
         rvAlready.setAdapter(mAlreadyAdapter);
         mNearby.clear();
         final RecyclerView rvPossible = (RecyclerView) view.findViewById(R.id.recycler_possible);
         mPossibleAdapter = new ContactAdapter(mNearby, mTyped, mAdded, false);
         rvPossible.setAdapter(mPossibleAdapter);

         mScanContext = SyncbasePersistence.getAppVContext().withCancel();
         try {
             ListenableFuture<Void> scan = InputChannels.withCallback(
                     Sharing.getDiscovery().scan(mScanContext,
                             "v.InterfaceName = \"" + Sharing.getPresenceInterface() + "\""),
                     new InputChannelCallback<Update>() {
                         private final Map<String, Integer> counterMap = new HashMap<>();

                         @Override
                         public ListenableFuture<Void> onNext(Update result) {
                             final String email = Iterables.getOnlyElement(result.getAddresses());
                             if (email == null) {
                                 return null;
                             }
                             // Note: binarySearch returns -|correct insert index| - 1 if it fails
                             // to find a match. For Java ints, this is the bitwise complement of the
                             // "correct" insertion index.
                             int searchIndex = Collections.binarySearch(mNearby, email);
                             if (result.isLost()) {
                                 Integer old = counterMap.get(email);
                                 counterMap.put(email, old == null ? 0 : Math.max(0, counterMap
                                         .get(email) - 1));
                                 // Remove the email if the counter indicates that we should.
                                 if (counterMap.get(email) == 0 && searchIndex >= 0) {
                                     mNearby.remove(searchIndex);
                                     mPossibleAdapter.notifyItemRemoved(searchIndex);
                                 }
                             } else {
                                 Integer old = counterMap.get(email);
                                 counterMap.put(email, old == null ? 1 : counterMap.get(email) + 1);
                                 // Show the email if it's a new one and not equal to our email.
                                 // TODO(alexfandrianto): This still lets you see emails of those
                                 // nearby who you've already invited.
                                 if (searchIndex < 0 && !email.equals(getParent().getEmail())) {
                                     int insertIndex = ~searchIndex;
                                     mNearby.add(insertIndex, email);
                                     //mNearby.add(email);
                                     mPossibleAdapter.notifyItemInserted(insertIndex);
                                 }
                             }
                             return null;
                         }
                     });
             Futures.addCallback(scan, new FutureCallback<Void>() {
                 @Override
                 public void onSuccess(@Nullable Void result) {
                 }

                 @Override
                 public void onFailure(Throwable t) {
                     handleScanningError(t);
                 }
             });
         } catch (VException e) {
             handleScanningError(e);
         }

         final EditText editText = (EditText) view.findViewById(R.id.custom_email);
         editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
             @Override
             public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                 boolean handled = false;
                 if (actionId == EditorInfo.IME_ACTION_SEND) {
                     String email = editText.getText().toString();
                     if (!mTyped.contains(email)) {
                         mTyped.add(email);
                     }
                     mAdded.add(email);
                     rvPossible.getAdapter().notifyDataSetChanged();
                     editText.setText("");
                     handled = true;
                 }
                 return handled;
             }
         });

         return new AlertDialog.Builder(getActivity())
                 .setView(view)
                 .setPositiveButton("Save", new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int whichButton) {
                         getParent().persistence.shareTodoList(mAdded);
                         // TODO(alexfandrianto/rosswang): removal
                     }
                 })
                 .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int whichButton) {
                     }
                 })
                 .create();
     }

     private void handleScanningError(Throwable t) {
         //TODO(rosswang): indicate error in the view
         SyncbasePersistence.getAppErrorReporter().onError(R.string.err_scan_nearby, t);
     }

     public void onSharedToChanged() {
         //TODO(rosswang)
     }

     private static class ContactAdapter extends RecyclerView.Adapter<ContactViewHolder> {
         private final List<String> backup;
         private final List<String> bonus;
         private final Set<String> toggledOn;
         private final boolean strikethrough; // If false, then bold.

         public ContactAdapter(List<String> backup, Set<String> toggledOn, boolean strikethrough) {
             super();
             this.backup = backup;
             this.bonus = null;
             this.toggledOn = toggledOn;
             this.strikethrough = strikethrough;
         }

         public ContactAdapter(List<String> backup, List<String> bonus, Set<String> toggledOn,
                               boolean strikethrough) {
             super();
             this.backup = backup;
             this.bonus = bonus;
             this.toggledOn = toggledOn;
             this.strikethrough = strikethrough;
         }

         @Override
         public ContactViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
             return new ContactViewHolder(new TextView(parent.getContext()));
         }

         @Override
         public void onBindViewHolder(final ContactViewHolder holder, int position) {
             final String name = position < backup.size() ? backup.get(position) :
                     bonus.get(position - backup.size());
             final boolean present = toggledOn.contains(name);
             holder.bindString(name, present, strikethrough, new View.OnClickListener() {

                 @Override
                 public void onClick(View view) {
                     if (present) {
                         toggledOn.remove(name);
                     } else {
                         toggledOn.add(name);
                     }
                     notifyItemChanged(holder.getAdapterPosition());
                 }
             });
         }

         @Override
         public int getItemCount() {
             int extra = bonus == null ? 0 : bonus.size();
             return backup.size() + extra;
         }
     }

     private static class ContactViewHolder extends RecyclerView.ViewHolder {
         public ContactViewHolder(View itemView) {
             super(itemView);
         }

         public void bindString(String name, boolean isActive, boolean strikethrough, View
                 .OnClickListener listener) {
             TextView text = (TextView) itemView;

             text.setText(name);
             text.setTextSize(18);
             if (strikethrough) {
                 if (isActive) {
                     text.setPaintFlags(text.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
                 } else {
                     text.setPaintFlags(text.getPaintFlags() & ~Paint.STRIKE_THRU_TEXT_FLAG);
                 }
             } else {
                 // We should bold!
                 if (isActive) {
                     text.setTypeface(null, 1); // 1 is bold
                 } else {
                     text.setTypeface(null, 0); // 0 is default text style
                 }
             }

             text.setOnClickListener(listener);
         }
     }
 }
	// Copyright 2016 The Vanadium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style
	// license that can be found in the LICENSE file.

	package io.v.todos.sharing;

	import android.app.Dialog;
	import android.app.DialogFragment;
	import android.app.FragmentManager;
	import android.content.DialogInterface;
	import android.graphics.Paint;
	import android.os.Bundle;
	import android.support.v7.app.AlertDialog;
	import android.support.v7.widget.RecyclerView;
	import android.view.KeyEvent;
	import android.view.View;
	import android.view.ViewGroup;
	import android.view.inputmethod.EditorInfo;
	import android.widget.EditText;
	import android.widget.TextView;

	import com.google.common.collect.Iterables;
	import com.google.common.util.concurrent.FutureCallback;
	import com.google.common.util.concurrent.Futures;
	import com.google.common.util.concurrent.ListenableFuture;

	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.HashMap;
	import java.util.HashSet;
	import java.util.List;
	import java.util.Map;
	import java.util.Set;

	import javax.annotation.Nullable;

	import io.v.todos.R;
	import io.v.todos.persistence.syncbase.SyncbasePersistence;
	import io.v.v23.InputChannelCallback;
	import io.v.v23.InputChannels;
	import io.v.v23.context.VContext;
	import io.v.v23.discovery.Update;
	import io.v.v23.verror.VException;

	/**
	* The share dialog contains two recycler views. The top one shows the existing items, and the
	* bottom shows ones that are nearby but not shared to yet. There's also a freeform text box to
	* allow entry of any value. Confirming this dialog sends the set of added and removed emails. Tap
	* to add/remove.
	*/
	public class ShareListDialogFragment extends DialogFragment {
	public static final String FRAGMENT_TAG = ShareListDialogFragment.class.getSimpleName();

	public static ShareListDialogFragment find(FragmentManager fragmentManager) {
	return (ShareListDialogFragment) fragmentManager.findFragmentByTag(FRAGMENT_TAG);
	}

	private Set<String> mRemoved;
	private List<String> mNearby = new ArrayList<>();
	private ArrayList<String> mTyped;
	private Set<String> mAdded;

	private static final String
	REMOVED_KEY = "removedShares",
	TYPED_KEY = "explicitShares",
	ADDED_KEY = "addedShares";

	private ContactAdapter mAlreadyAdapter, mPossibleAdapter;

	private VContext mScanContext;

	private ShareListMenuFragment getParent() {
	return ((ShareListMenuFragment) getParentFragment());
	}

	@Override
	public void onDestroyView() {
	mScanContext.cancel();
	super.onDestroyView();
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
	super.onSaveInstanceState(outState);

	outState.putStringArrayList(REMOVED_KEY, new ArrayList<>(mRemoved));
	outState.putStringArrayList(TYPED_KEY, mTyped);
	outState.putStringArrayList(ADDED_KEY, new ArrayList<>(mAdded));
	}

	@Override
	public Dialog onCreateDialog(Bundle savedInstanceState) {
	View view = getActivity().getLayoutInflater().inflate(R.layout.sharing, null);

	if (savedInstanceState == null) {
	mRemoved = new HashSet<>();
	mAdded = new HashSet<>();
	mTyped = new ArrayList<>();
	} else {
	mRemoved = new HashSet<>(savedInstanceState.getStringArrayList(REMOVED_KEY));
	mAdded = new HashSet<>(savedInstanceState.getStringArrayList(ADDED_KEY));
	mTyped = savedInstanceState.getStringArrayList(TYPED_KEY);
	}

	mAlreadyAdapter = new ContactAdapter(getParent().getSharedTo(), mRemoved, true);
	RecyclerView rvAlready = (RecyclerView) view.findViewById(R.id.recycler_already);
	rvAlready.setAdapter(mAlreadyAdapter);
	mNearby.clear();
	final RecyclerView rvPossible = (RecyclerView) view.findViewById(R.id.recycler_possible);
	mPossibleAdapter = new ContactAdapter(mNearby, mTyped, mAdded, false);
	rvPossible.setAdapter(mPossibleAdapter);

	mScanContext = SyncbasePersistence.getAppVContext().withCancel();
	try {
	ListenableFuture<Void> scan = InputChannels.withCallback(
	Sharing.getDiscovery().scan(mScanContext,
	"v.InterfaceName = \"" + Sharing.getPresenceInterface() + "\""),
	new InputChannelCallback<Update>() {
	private final Map<String, Integer> counterMap = new HashMap<>();

	@Override
	public ListenableFuture<Void> onNext(Update result) {
	final String email = Iterables.getOnlyElement(result.getAddresses());
	if (email == null) {
	return null;
	}
	// Note: binarySearch returns -\|correct insert index\| - 1 if it fails
	// to find a match. For Java ints, this is the bitwise complement of the
	// "correct" insertion index.
	int searchIndex = Collections.binarySearch(mNearby, email);
	if (result.isLost()) {
	Integer old = counterMap.get(email);
	counterMap.put(email, old == null ? 0 : Math.max(0, counterMap
	.get(email) - 1));
	// Remove the email if the counter indicates that we should.
	if (counterMap.get(email) == 0 && searchIndex >= 0) {
	mNearby.remove(searchIndex);
	mPossibleAdapter.notifyItemRemoved(searchIndex);
	}
	} else {
	Integer old = counterMap.get(email);
	counterMap.put(email, old == null ? 1 : counterMap.get(email) + 1);
	// Show the email if it's a new one and not equal to our email.
	// TODO(alexfandrianto): This still lets you see emails of those
	// nearby who you've already invited.
	if (searchIndex < 0 && !email.equals(getParent().getEmail())) {
	int insertIndex = ~searchIndex;
	mNearby.add(insertIndex, email);
	//mNearby.add(email);
	mPossibleAdapter.notifyItemInserted(insertIndex);
	}
	}
	return null;
	}
	});
	Futures.addCallback(scan, new FutureCallback<Void>() {
	@Override
	public void onSuccess(@Nullable Void result) {
	}

	@Override
	public void onFailure(Throwable t) {
	handleScanningError(t);
	}
	});
	} catch (VException e) {
	handleScanningError(e);
	}

	final EditText editText = (EditText) view.findViewById(R.id.custom_email);
	editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
	@Override
	public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
	boolean handled = false;
	if (actionId == EditorInfo.IME_ACTION_SEND) {
	String email = editText.getText().toString();
	if (!mTyped.contains(email)) {
	mTyped.add(email);
	}
	mAdded.add(email);
	rvPossible.getAdapter().notifyDataSetChanged();
	editText.setText("");
	handled = true;
	}
	return handled;
	}
	});

	return new AlertDialog.Builder(getActivity())
	.setView(view)
	.setPositiveButton("Save", new DialogInterface.OnClickListener() {
	public void onClick(DialogInterface dialog, int whichButton) {
	getParent().persistence.shareTodoList(mAdded);
	// TODO(alexfandrianto/rosswang): removal
	}
	})
	.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
	public void onClick(DialogInterface dialog, int whichButton) {
	}
	})
	.create();
	}

	private void handleScanningError(Throwable t) {
	//TODO(rosswang): indicate error in the view
	SyncbasePersistence.getAppErrorReporter().onError(R.string.err_scan_nearby, t);
	}

	public void onSharedToChanged() {
	//TODO(rosswang)
	}

	private static class ContactAdapter extends RecyclerView.Adapter<ContactViewHolder> {
	private final List<String> backup;
	private final List<String> bonus;
	private final Set<String> toggledOn;
	private final boolean strikethrough; // If false, then bold.

	public ContactAdapter(List<String> backup, Set<String> toggledOn, boolean strikethrough) {
	super();
	this.backup = backup;
	this.bonus = null;
	this.toggledOn = toggledOn;
	this.strikethrough = strikethrough;
	}

	public ContactAdapter(List<String> backup, List<String> bonus, Set<String> toggledOn,
	boolean strikethrough) {
	super();
	this.backup = backup;
	this.bonus = bonus;
	this.toggledOn = toggledOn;
	this.strikethrough = strikethrough;
	}

	@Override
	public ContactViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
	return new ContactViewHolder(new TextView(parent.getContext()));
	}

	@Override
	public void onBindViewHolder(final ContactViewHolder holder, int position) {
	final String name = position < backup.size() ? backup.get(position) :
	bonus.get(position - backup.size());
	final boolean present = toggledOn.contains(name);
	holder.bindString(name, present, strikethrough, new View.OnClickListener() {

	@Override
	public void onClick(View view) {
	if (present) {
	toggledOn.remove(name);
	} else {
	toggledOn.add(name);
	}
	notifyItemChanged(holder.getAdapterPosition());
	}
	});
	}

	@Override
	public int getItemCount() {
	int extra = bonus == null ? 0 : bonus.size();
	return backup.size() + extra;
	}
	}

	private static class ContactViewHolder extends RecyclerView.ViewHolder {
	public ContactViewHolder(View itemView) {
	super(itemView);
	}

	public void bindString(String name, boolean isActive, boolean strikethrough, View
	.OnClickListener listener) {
	TextView text = (TextView) itemView;

	text.setText(name);
	text.setTextSize(18);
	if (strikethrough) {
	if (isActive) {
	text.setPaintFlags(text.getPaintFlags() \| Paint.STRIKE_THRU_TEXT_FLAG);
	} else {
	text.setPaintFlags(text.getPaintFlags() & ~Paint.STRIKE_THRU_TEXT_FLAG);
	}
	} else {
	// We should bold!
	if (isActive) {
	text.setTypeface(null, 1); // 1 is bold
	} else {
	text.setTypeface(null, 0); // 0 is default text style
	}
	}

	text.setOnClickListener(listener);
	}
	}
	}