GitNex/app/src/main/java/org/mian/gitnex/fragments/FilesFragment.java

package org.mian.gitnex.fragments;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.EditorInfo;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.ViewModelProvider;
import androidx.recyclerview.widget.DividerItemDecoration;
import androidx.recyclerview.widget.LinearLayoutManager;
import org.gitnex.tea4j.models.Files;
import org.mian.gitnex.R;
import org.mian.gitnex.activities.FileViewActivity;
import org.mian.gitnex.activities.RepoDetailActivity;
import org.mian.gitnex.adapters.FilesAdapter;
import org.mian.gitnex.databinding.FragmentFilesBinding;
import org.mian.gitnex.helpers.AppUtil;
import org.mian.gitnex.helpers.Authorization;
import org.mian.gitnex.helpers.Path;
import org.mian.gitnex.viewmodels.FilesViewModel;
import java.util.ArrayList;
import java.util.Collections;
import moe.feng.common.view.breadcrumbs.DefaultBreadcrumbsCallback;
import moe.feng.common.view.breadcrumbs.model.BreadcrumbItem;

/**
 * Author M M Arif
 */

public class FilesFragment extends Fragment implements FilesAdapter.FilesAdapterListener {

	private FragmentFilesBinding binding;

	private static final String repoNameF = "param2";
	private static final String repoOwnerF = "param1";
	private static final String repoRefF = "param3";

	private String repoName;
	private String repoOwner;
	private String ref;

	private final Path path = new Path();

	private FilesAdapter filesAdapter;

	private OnFragmentInteractionListener mListener;

	public FilesFragment() {}

	public static FilesFragment newInstance(String param1, String param2, String param3) {

		FilesFragment fragment = new FilesFragment();

		Bundle args = new Bundle();
		args.putString(repoOwnerF, param1);
		args.putString(repoNameF, param2);
		args.putString(repoRefF, param3);

		fragment.setArguments(args);

		return fragment;
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		if(getArguments() != null) {
			repoName = getArguments().getString(repoNameF);
			repoOwner = getArguments().getString(repoOwnerF);
			ref = getArguments().getString(repoRefF);
		}
	}

	@Override
	public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

		binding = FragmentFilesBinding.inflate(inflater, container, false);
		setHasOptionsMenu(true);

		filesAdapter = new FilesAdapter(getContext(), this);

		binding.recyclerView.setHasFixedSize(true);
		binding.recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
		binding.recyclerView.setAdapter(filesAdapter);

		DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(binding.recyclerView.getContext(), DividerItemDecoration.VERTICAL);
		binding.recyclerView.addItemDecoration(dividerItemDecoration);

		binding.breadcrumbsView.setItems(new ArrayList<>(Collections.singletonList(BreadcrumbItem.createSimpleItem(getResources().getString(R.string.filesBreadcrumbRoot) + getResources().getString(R.string.colonDivider) + ref))));
		// noinspection unchecked
		binding.breadcrumbsView.setCallback(new DefaultBreadcrumbsCallback<BreadcrumbItem>() {

			@SuppressLint("SetTextI18n")
			@Override
			public void onNavigateBack(BreadcrumbItem item, int position) {

				if(position == 0) {

					path.clear();
					fetchDataAsync(Authorization.get(getContext()), repoOwner, repoName, ref);
					return;

				}

				path.pop(path.size() - position);
				fetchDataAsyncSub(Authorization.get(getContext()), repoOwner, repoName, path.toString(), ref);

			}

			@Override public void onNavigateNewLocation(BreadcrumbItem newItem, int changedPosition) {}

		});

		((RepoDetailActivity) requireActivity()).setFragmentRefreshListenerFiles(repoBranch -> {

			path.clear();
			ref = repoBranch;
			binding.breadcrumbsView.setItems(new ArrayList<>(Collections.singletonList(BreadcrumbItem.createSimpleItem(getResources().getString(R.string.filesBreadcrumbRoot) + getResources().getString(R.string.colonDivider) + ref))));
			fetchDataAsync(Authorization.get(getContext()), repoOwner, repoName, repoBranch);

		});

		String dir = requireActivity().getIntent().getStringExtra("dir");
		if(dir != null) {
			fetchDataAsyncSub(Authorization.get(getContext()), repoOwner, repoName, dir, ref);
			for(String segment: dir.split("/")) {
				binding.breadcrumbsView.addItem(new BreadcrumbItem(Collections.singletonList(segment)));
				path.add(segment);
			}
		}
		else {
			fetchDataAsync(Authorization.get(getContext()), repoOwner, repoName, ref);
		}

		return binding.getRoot();
	}

	@Override
	public void onResume() {

		super.onResume();
	}

	@Override
	public void onClickFile(Files file) {

		switch(file.getType()) {

			case "dir":
				path.add(file.getName());
				binding.breadcrumbsView.addItem(new BreadcrumbItem(Collections.singletonList(file.getName())));

				fetchDataAsyncSub(Authorization.get(getContext()), repoOwner, repoName, path.toString(), ref);
				break;

			case "file":
				Intent intent = new Intent(getContext(), FileViewActivity.class);
				intent.putExtra("file", file);

				requireContext().startActivity(intent);
				break;

		}
	}

	private void fetchDataAsync(String instanceToken, String owner, String repo, String ref) {

		binding.recyclerView.setVisibility(View.GONE);
		binding.progressBar.setVisibility(View.VISIBLE);

		FilesViewModel filesModel = new ViewModelProvider(this).get(FilesViewModel.class);

		filesModel.getFilesList(instanceToken, owner, repo, ref, getContext(), binding.progressBar, binding.noDataFiles).observe(getViewLifecycleOwner(), filesListMain -> {

			filesAdapter.getOriginalFiles().clear();
			filesAdapter.getOriginalFiles().addAll(filesListMain);
			filesAdapter.notifyOriginalDataSetChanged();

			if(filesListMain.size() > 0) {

				AppUtil.setMultiVisibility(View.VISIBLE, binding.recyclerView, binding.filesFrame);
				binding.noDataFiles.setVisibility(View.GONE);

			}
			else {
				AppUtil.setMultiVisibility(View.VISIBLE, binding.recyclerView, binding.filesFrame, binding.noDataFiles);
			}

			binding.filesFrame.setVisibility(View.VISIBLE);
			binding.progressBar.setVisibility(View.GONE);

		});

	}

	private void fetchDataAsyncSub(String instanceToken, String owner, String repo, String filesDir, String ref) {

		binding.recyclerView.setVisibility(View.GONE);
		binding.progressBar.setVisibility(View.VISIBLE);

		FilesViewModel filesModel = new ViewModelProvider(this).get(FilesViewModel.class);

		filesModel.getFilesList2(instanceToken, owner, repo, filesDir, ref, getContext(), binding.progressBar, binding.noDataFiles).observe(this, filesListMain2 -> {

			filesAdapter.getOriginalFiles().clear();
			filesAdapter.getOriginalFiles().addAll(filesListMain2);
			filesAdapter.notifyOriginalDataSetChanged();

			if(filesListMain2.size() > 0) {

				AppUtil.setMultiVisibility(View.VISIBLE, binding.recyclerView, binding.filesFrame);
				binding.noDataFiles.setVisibility(View.GONE);
			}
			else {
				AppUtil.setMultiVisibility(View.VISIBLE, binding.recyclerView, binding.filesFrame, binding.noDataFiles);
			}

			binding.filesFrame.setVisibility(View.VISIBLE);
			binding.progressBar.setVisibility(View.GONE);

		});

	}

	@Override
	public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {

		menu.clear();
		inflater.inflate(R.menu.search_menu, menu);
		inflater.inflate(R.menu.files_switch_branches_menu, menu);
		super.onCreateOptionsMenu(menu, inflater);

		MenuItem searchItem = menu.findItem(R.id.action_search);
		androidx.appcompat.widget.SearchView searchView = (androidx.appcompat.widget.SearchView) searchItem.getActionView();
		searchView.setImeOptions(EditorInfo.IME_ACTION_DONE);

		searchView.setOnQueryTextListener(new androidx.appcompat.widget.SearchView.OnQueryTextListener() {

			@Override
			public boolean onQueryTextChange(String newText) {

				if(binding.recyclerView.getAdapter() != null) {
					filesAdapter.getFilter().filter(newText);
				}

				return false;
			}

			@Override
			public boolean onQueryTextSubmit(String query) { return false; }

		});

	}

	public void onButtonPressed(Uri uri) {

		if(mListener != null) {
			mListener.onFragmentInteraction(uri);
		}
	}

	@Override
	public void onDetach() {

		super.onDetach();
		mListener = null;
	}

	public interface OnFragmentInteractionListener { void onFragmentInteraction(Uri uri); }

}