Tusky-App-Android/app/src/main/java/com/keylesspalace/tusky/fragment/ViewThreadFragment.java

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/* Copyright 2017 Andrew Dawson
*
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* This file is a part of Tusky.
*
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* 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.
*
* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
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* You should have received a copy of the GNU General Public License along with Tusky; if not,
* see <http://www.gnu.org/licenses>. */
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package com.keylesspalace.tusky.fragment;
import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
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import android.support.design.widget.Snackbar;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.keylesspalace.tusky.BuildConfig;
import com.keylesspalace.tusky.R;
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import com.keylesspalace.tusky.adapter.ThreadAdapter;
import com.keylesspalace.tusky.entity.Card;
import com.keylesspalace.tusky.entity.Status;
import com.keylesspalace.tusky.entity.StatusContext;
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import com.keylesspalace.tusky.interfaces.StatusActionListener;
import com.keylesspalace.tusky.receiver.TimelineReceiver;
import com.keylesspalace.tusky.util.PairedList;
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import com.keylesspalace.tusky.util.ThemeUtils;
import com.keylesspalace.tusky.util.ViewDataUtils;
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import com.keylesspalace.tusky.view.ConversationLineItemDecoration;
import com.keylesspalace.tusky.viewdata.StatusViewData;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
public class ViewThreadFragment extends SFragment implements
SwipeRefreshLayout.OnRefreshListener, StatusActionListener {
private static final String TAG = "ViewThreadFragment";
private SwipeRefreshLayout swipeRefreshLayout;
private RecyclerView recyclerView;
private ThreadAdapter adapter;
private String thisThreadsStatusId;
private TimelineReceiver timelineReceiver;
private Card card;
private int statusIndex = 0;
private final PairedList<Status, StatusViewData> statuses =
new PairedList<>(ViewDataUtils.statusMapper());
public static ViewThreadFragment newInstance(String id) {
Bundle arguments = new Bundle();
ViewThreadFragment fragment = new ViewThreadFragment();
arguments.putString("id", id);
fragment.setArguments(arguments);
return fragment;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_view_thread, container, false);
Context context = getContext();
swipeRefreshLayout = rootView.findViewById(R.id.swipe_refresh_layout);
swipeRefreshLayout.setOnRefreshListener(this);
recyclerView = rootView.findViewById(R.id.recycler_view);
recyclerView.setHasFixedSize(true);
LinearLayoutManager layoutManager = new LinearLayoutManager(context);
recyclerView.setLayoutManager(layoutManager);
DividerItemDecoration divider = new DividerItemDecoration(
context, layoutManager.getOrientation());
Drawable drawable = ThemeUtils.getDrawable(context, R.attr.status_divider_drawable,
R.drawable.status_divider_dark);
divider.setDrawable(drawable);
recyclerView.addItemDecoration(divider);
recyclerView.addItemDecoration(new ConversationLineItemDecoration(context,
ContextCompat.getDrawable(context, R.drawable.conversation_divider_dark)));
adapter = new ThreadAdapter(this);
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(
getActivity());
boolean mediaPreviewEnabled = preferences.getBoolean("mediaPreviewEnabled", true);
adapter.setMediaPreviewEnabled(mediaPreviewEnabled);
recyclerView.setAdapter(adapter);
statuses.clear();
thisThreadsStatusId = null;
timelineReceiver = new TimelineReceiver(this, this);
LocalBroadcastManager.getInstance(context.getApplicationContext())
.registerReceiver(timelineReceiver, TimelineReceiver.getFilter(null));
return rootView;
}
@Override
public void onDestroyView() {
LocalBroadcastManager.getInstance(getContext())
.unregisterReceiver(timelineReceiver);
super.onDestroyView();
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
thisThreadsStatusId = getArguments().getString("id");
onRefresh();
}
@Override
public void onRefresh() {
sendStatusRequest(thisThreadsStatusId);
sendThreadRequest(thisThreadsStatusId);
sendCardRequest(thisThreadsStatusId);
}
@Override
public void onReply(int position) {
super.reply(statuses.get(position));
}
@Override
public void onReblog(final boolean reblog, final int position) {
final Status status = statuses.get(position);
super.reblogWithCallback(statuses.get(position), reblog, new Callback<Status>() {
@Override
public void onResponse(@NonNull Call<Status> call, @NonNull Response<Status> response) {
if (response.isSuccessful()) {
status.reblogged = reblog;
if (status.reblog != null) {
status.reblog.reblogged = reblog;
}
// create new viewData as side effect
statuses.set(position, status);
adapter.setItem(position, statuses.getPairedItem(position), true);
}
}
@Override
public void onFailure(@NonNull Call<Status> call, @NonNull Throwable t) {
Log.d(getClass().getSimpleName(), "Failed to reblog status: " + status.id);
t.printStackTrace();
}
});
}
@Override
public void onFavourite(final boolean favourite, final int position) {
final Status status = statuses.get(position);
super.favouriteWithCallback(statuses.get(position), favourite, new Callback<Status>() {
@Override
public void onResponse(@NonNull Call<Status> call, @NonNull Response<Status> response) {
if (response.isSuccessful()) {
status.favourited = favourite;
if (status.reblog != null) {
status.reblog.favourited = favourite;
}
// create new viewData as side effect
statuses.set(position, status);
adapter.setItem(position, statuses.getPairedItem(position), true);
}
}
@Override
public void onFailure(@NonNull Call<Status> call, @NonNull Throwable t) {
Log.d(getClass().getSimpleName(), "Failed to favourite status: " + status.id);
t.printStackTrace();
}
});
}
@Override
public void onMore(View view, int position) {
super.more(statuses.get(position), view, position);
}
@Override
public void onViewMedia(String[] urls, int urlIndex, Status.MediaAttachment.Type type,
View view) {
super.viewMedia(urls, urlIndex, type, view);
}
@Override
public void onViewThread(int position) {
Status status = statuses.get(position);
if (thisThreadsStatusId.equals(status.id)) {
// If already viewing this thread, don't reopen it.
return;
}
super.viewThread(status);
}
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@Override
public void onOpenReblog(int position) {
// there should be no reblogs in the thread but let's implement it to be sure
super.openReblog(statuses.get(position));
}
@Override
public void onExpandedChange(boolean expanded, int position) {
StatusViewData newViewData = new StatusViewData.Builder(statuses.getPairedItem(position))
.setIsExpanded(expanded)
.createStatusViewData();
statuses.setPairedItem(position, newViewData);
adapter.setItem(position, newViewData, false);
}
@Override
public void onContentHiddenChange(boolean isShowing, int position) {
StatusViewData newViewData = new StatusViewData.Builder(statuses.getPairedItem(position))
.setIsShowingSensitiveContent(isShowing)
.createStatusViewData();
statuses.setPairedItem(position, newViewData);
adapter.setItem(position, newViewData, false);
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}
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@Override
public void onLoadMore(int pos) {
}
@Override
public void onViewTag(String tag) {
super.viewTag(tag);
}
@Override
public void onViewAccount(String id) {
super.viewAccount(id);
}
@Override
public void removeItem(int position) {
if(position == statusIndex) {
//the status got removed, close the activity
getActivity().finish();
}
statuses.remove(position);
adapter.setStatuses(statuses.getPairedCopy());
}
@Override
public void removeAllByAccountId(String accountId) {
Status status = null;
if (!statuses.isEmpty()) {
status = statuses.get(statusIndex);
}
// using iterator to safely remove items while iterating
Iterator<Status> iterator = statuses.iterator();
while (iterator.hasNext()) {
Status s = iterator.next();
if (s.account.id.equals(accountId)) {
iterator.remove();
}
}
statusIndex = statuses.indexOf(status);
if(statusIndex == -1) {
//the status got removed, close the activity
getActivity().finish();
return;
}
adapter.setDetailedStatusPosition(statusIndex);
adapter.setStatuses(statuses.getPairedCopy());
}
private void sendStatusRequest(final String id) {
Call<Status> call = mastodonApi.status(id);
call.enqueue(new Callback<Status>() {
@Override
public void onResponse(@NonNull Call<Status> call, @NonNull Response<Status> response) {
if (response.isSuccessful()) {
int position = setStatus(response.body());
recyclerView.scrollToPosition(position);
} else {
onThreadRequestFailure(id);
}
}
@Override
public void onFailure(@NonNull Call<Status> call, @NonNull Throwable t) {
onThreadRequestFailure(id);
}
});
callList.add(call);
}
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private void sendThreadRequest(final String id) {
Call<StatusContext> call = mastodonApi.statusContext(id);
call.enqueue(new Callback<StatusContext>() {
@Override
public void onResponse(@NonNull Call<StatusContext> call, @NonNull Response<StatusContext> response) {
if (response.isSuccessful()) {
swipeRefreshLayout.setRefreshing(false);
StatusContext context = response.body();
setContext(context.ancestors, context.descendants);
} else {
onThreadRequestFailure(id);
}
}
@Override
public void onFailure(@NonNull Call<StatusContext> call, @NonNull Throwable t) {
onThreadRequestFailure(id);
}
});
callList.add(call);
}
private void sendCardRequest(final String id) {
Call<Card> call = mastodonApi.statusCard(id);
call.enqueue(new Callback<Card>() {
@Override
public void onResponse(@NonNull Call<Card> call, @NonNull Response<Card> response) {
if (response.isSuccessful()) {
showCard(response.body());
} else {
onThreadRequestFailure(id);
}
}
@Override
public void onFailure(@NonNull Call<Card> call, @NonNull Throwable t) {
onThreadRequestFailure(id);
}
});
callList.add(call);
}
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private void onThreadRequestFailure(final String id) {
View view = getView();
swipeRefreshLayout.setRefreshing(false);
if (view != null) {
Snackbar.make(view, R.string.error_generic, Snackbar.LENGTH_LONG)
.setAction(R.string.action_retry, new View.OnClickListener() {
@Override
public void onClick(View v) {
sendThreadRequest(id);
sendStatusRequest(id);
}
})
.show();
} else {
Log.e(TAG, "Couldn't display thread fetch error message");
}
}
private int setStatus(Status status) {
if (statuses.size() > 0
&& statusIndex < statuses.size()
&& statuses.get(statusIndex).equals(status)) {
// Do not add this status on refresh, it's already in there.
statuses.set(statusIndex, status);
return statusIndex;
}
int i = statusIndex;
statuses.add(i, status);
adapter.setDetailedStatusPosition(i);
StatusViewData viewData = statuses.getPairedItem(i);
if(viewData.getCard() == null && card != null) {
viewData = new StatusViewData.Builder(viewData)
.setCard(card)
.createStatusViewData();
}
adapter.addItem(i, viewData);
return i;
}
private void setContext(List<Status> ancestors, List<Status> descendants) {
Status mainStatus = null;
// In case of refresh, remove old ancestors and descendants first. We'll remove all blindly,
// as we have no guarantee on their order to be the same as before
int oldSize = statuses.size();
if (oldSize > 1) {
mainStatus = statuses.get(statusIndex);
statuses.clear();
adapter.clearItems();
}
// Insert newly fetched ancestors
statusIndex = ancestors.size();
adapter.setDetailedStatusPosition(statusIndex);
statuses.addAll(0, ancestors);
List<StatusViewData> ancestorsViewDatas = statuses.getPairedCopy().subList(0, statusIndex);
if (BuildConfig.DEBUG && ancestors.size() != ancestorsViewDatas.size()) {
String error = String.format(Locale.getDefault(),
"Incorrectly got statusViewData sublist." +
" ancestors.size == %d ancestorsViewDatas.size == %d," +
" statuses.size == %d",
ancestors.size(), ancestorsViewDatas.size(), statuses.size());
throw new AssertionError(error);
}
adapter.addAll(0, ancestorsViewDatas);
if (mainStatus != null) {
// In case we needed to delete everything (which is way easier than deleting
// everything except one), re-insert the remaining status here.
statuses.add(statusIndex, mainStatus);
StatusViewData viewData = statuses.getPairedItem(statusIndex);
if(viewData.getCard() == null && card != null) {
viewData = new StatusViewData.Builder(viewData)
.setCard(card)
.createStatusViewData();
}
adapter.addItem(statusIndex, viewData);
}
// Insert newly fetched descendants
statuses.addAll(descendants);
List<StatusViewData> descendantsViewData;
descendantsViewData = statuses.getPairedCopy()
.subList(statuses.size() - descendants.size(), statuses.size());
if (BuildConfig.DEBUG && descendants.size() != descendantsViewData.size()) {
String error = String.format(Locale.getDefault(),
"Incorrectly got statusViewData sublist." +
" descendants.size == %d descendantsViewData.size == %d," +
" statuses.size == %d",
descendants.size(), descendantsViewData.size(), statuses.size());
throw new AssertionError(error);
}
adapter.addAll(descendantsViewData);
}
private void showCard(Card card) {
this.card = card;
if(statuses.size() != 0) {
StatusViewData oldViewData = statuses.getPairedItem(statusIndex);
if(oldViewData != null) {
StatusViewData newViewData = new StatusViewData.Builder(statuses.getPairedItem(statusIndex))
.setCard(card)
.createStatusViewData();
statuses.setPairedItem(statusIndex, newViewData);
adapter.setItem(statusIndex, newViewData, true);
}
}
}
public void clear() {
statuses.clear();
adapter.clear();
}
}