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package it.niedermann.nextcloud.deck.ui.pickstack;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.LiveData;
import androidx.lifecycle.Observer;
import androidx.lifecycle.ViewModelProvider;
import java.util.List;
import it.niedermann.nextcloud.deck.databinding.FragmentPickStackBinding;
import it.niedermann.nextcloud.deck.model.Account;
import it.niedermann.nextcloud.deck.model.Board;
import it.niedermann.nextcloud.deck.model.Stack;
import it.niedermann.nextcloud.deck.ui.ImportAccountActivity;
import it.niedermann.nextcloud.deck.ui.preparecreate.AccountAdapter;
import it.niedermann.nextcloud.deck.ui.preparecreate.BoardAdapter;
import it.niedermann.nextcloud.deck.ui.preparecreate.SelectedListener;
import it.niedermann.nextcloud.deck.ui.preparecreate.StackAdapter;
import static androidx.lifecycle.Transformations.switchMap;
import static it.niedermann.nextcloud.deck.DeckApplication.readCurrentAccountId;
import static it.niedermann.nextcloud.deck.DeckApplication.readCurrentBoardId;
import static it.niedermann.nextcloud.deck.DeckApplication.readCurrentStackId;
public class PickStackFragment extends Fragment {
private FragmentPickStackBinding binding;
private PickStackViewModel viewModel;
private static final String KEY_SHOW_BOARDS_WITHOUT_EDIT_PERMISSION = "show_boards_without_edit_permission";
private PickStackListener pickStackListener;
private boolean showBoardsWithoutEditPermission = false;
private long lastAccountId;
private long lastBoardId;
private long lastStackId;
private ArrayAdapter<Account> accountAdapter;
private ArrayAdapter<Board> boardAdapter;
private ArrayAdapter<Stack> stackAdapter;
@Nullable
private LiveData<List<Board>> boardsLiveData;
@NonNull
private Observer<List<Board>> boardsObserver = (boards) -> {
boardAdapter.clear();
boardAdapter.addAll(boards);
binding.boardSelect.setEnabled(true);
if (boards.size() > 0) {
binding.boardSelect.setEnabled(true);
Board boardToSelect = null;
for (Board board : boards) {
if (board.getLocalId() == lastBoardId) {
boardToSelect = board;
break;
}
}
if (boardToSelect == null) {
boardToSelect = boards.get(0);
}
binding.boardSelect.setSelection(boardAdapter.getPosition(boardToSelect));
} else {
binding.boardSelect.setEnabled(false);
pickStackListener.onStackPicked((Account) binding.accountSelect.getSelectedItem(), null, null);
}
};
@Nullable
private LiveData<List<Stack>> stacksLiveData;
@NonNull
private Observer<List<Stack>> stacksObserver = (stacks) -> {
stackAdapter.clear();
stackAdapter.addAll(stacks);
if (stacks.size() > 0) {
binding.stackSelect.setEnabled(true);
Stack stackToSelect = null;
for (Stack stack : stacks) {
if (stack.getLocalId() == lastStackId) {
stackToSelect = stack;
break;
}
}
if (stackToSelect == null) {
stackToSelect = stacks.get(0);
}
binding.stackSelect.setSelection(stackAdapter.getPosition(stackToSelect));
} else {
binding.stackSelect.setEnabled(false);
pickStackListener.onStackPicked((Account) binding.accountSelect.getSelectedItem(), (Board) binding.boardSelect.getSelectedItem(), null);
}
};
@Override
public void onAttach(@NonNull Context context) {
super.onAttach(context);
if (getParentFragment() instanceof PickStackListener) {
this.pickStackListener = (PickStackListener) getParentFragment();
} else if (context instanceof PickStackListener) {
this.pickStackListener = (PickStackListener) context;
} else {
throw new IllegalArgumentException("Caller must implement " + PickStackListener.class.getSimpleName());
}
final Bundle args = getArguments();
if (args != null) {
this.showBoardsWithoutEditPermission = args.getBoolean(KEY_SHOW_BOARDS_WITHOUT_EDIT_PERMISSION, false);
}
}
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
binding = FragmentPickStackBinding.inflate(getLayoutInflater());
viewModel = new ViewModelProvider(requireActivity()).get(PickStackViewModel.class);
accountAdapter = new AccountAdapter(requireContext());
binding.accountSelect.setAdapter(accountAdapter);
binding.accountSelect.setEnabled(false);
boardAdapter = new BoardAdapter(requireContext());
binding.boardSelect.setAdapter(boardAdapter);
binding.stackSelect.setEnabled(false);
stackAdapter = new StackAdapter(requireContext());
binding.stackSelect.setAdapter(stackAdapter);
binding.stackSelect.setEnabled(false);
switchMap(viewModel.hasAccounts(), hasAccounts -> {
if (hasAccounts) {
return viewModel.readAccounts();
} else {
startActivityForResult(new Intent(requireActivity(), ImportAccountActivity.class), ImportAccountActivity.REQUEST_CODE_IMPORT_ACCOUNT);
return null;
}
}).observe(getViewLifecycleOwner(), (List<Account> accounts) -> {
if (accounts == null || accounts.size() == 0) {
throw new IllegalStateException("hasAccounts() returns true, but readAccounts() returns null or has no entry");
}
lastAccountId = readCurrentAccountId(requireContext());
lastBoardId = readCurrentBoardId(requireContext(), lastAccountId);
lastStackId = readCurrentStackId(requireContext(), lastAccountId, lastBoardId);
accountAdapter.clear();
accountAdapter.addAll(accounts);
binding.accountSelect.setEnabled(true);
for (Account account : accounts) {
if (account.getId() == lastAccountId) {
binding.accountSelect.setSelection(accountAdapter.getPosition(account));
break;
}
}
});
binding.accountSelect.setOnItemSelectedListener((SelectedListener) (parent, view, position, id) -> {
updateLiveDataSource(boardsLiveData, boardsObserver, showBoardsWithoutEditPermission
? viewModel.getBoards(parent.getSelectedItemId())
: viewModel.getBoardsWithEditPermission(parent.getSelectedItemId()));
});
binding.boardSelect.setOnItemSelectedListener((SelectedListener) (parent, view, position, id) -> {
updateLiveDataSource(stacksLiveData, stacksObserver, viewModel.getStacksForBoard(binding.accountSelect.getSelectedItemId(), parent.getSelectedItemId()));
});
binding.stackSelect.setOnItemSelectedListener((SelectedListener) (parent, view, position, id) -> {
pickStackListener.onStackPicked((Account) binding.accountSelect.getSelectedItem(), (Board) binding.boardSelect.getSelectedItem(), (Stack) parent.getSelectedItem());
});
return binding.getRoot();
}
/**
* Updates the source of the given liveData and de- and reregisters the given observer.
*/
private <T> void updateLiveDataSource(@Nullable LiveData<T> liveData, Observer<T> observer, LiveData<T> newSource) {
if (liveData != null) {
liveData.removeObserver(observer);
}
liveData = newSource;
liveData.observe(getViewLifecycleOwner(), observer);
}
public static PickStackFragment newInstance(boolean showBoardsWithoutEditPermission) {
final PickStackFragment fragment = new PickStackFragment();
final Bundle args = new Bundle();
args.putBoolean(KEY_SHOW_BOARDS_WITHOUT_EDIT_PERMISSION, showBoardsWithoutEditPermission);
fragment.setArguments(args);
return fragment;
}
}
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