StockMovementHistoryFragment.java

/*
 * This program is part of the OpenLMIS logistics management information
 * system platform software.
 *
 * Copyright © 2015 ThoughtWorks, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details. You should
 * have received a copy of the GNU Affero General Public License along with
 * this program. If not, see http://www.gnu.org/licenses. For additional
 * information contact info@OpenLMIS.org
 */

package org.openlmis.core.view.fragment;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v4.widget.SwipeRefreshLayout.OnRefreshListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

import com.google.inject.Inject;

import org.openlmis.core.R;
import org.openlmis.core.manager.SharedPreferenceMgr;
import org.openlmis.core.presenter.Presenter;
import org.openlmis.core.presenter.StockMovementHistoryPresenter;
import org.openlmis.core.utils.Constants;
import org.openlmis.core.utils.ToastUtil;
import org.openlmis.core.view.BaseView;
import org.openlmis.core.view.adapter.StockMovementHistoryAdapter;

import roboguice.inject.InjectView;

public class StockMovementHistoryFragment extends BaseFragment implements StockMovementHistoryPresenter.StockMovementHistoryView, OnRefreshListener {

    @Inject
    StockMovementHistoryPresenter presenter;

    @InjectView(R.id.stock_movement_history_swipe_container)
    SwipeRefreshLayout swipeRefreshLayout;

    @InjectView(R.id.list)
    ListView historyListView;

    @InjectView(R.id.tv_archived_old_data)
    TextView tvArchivedOldData;

    private long stockCardID;
    private long startIndex = 0;
    private boolean isLoading;
    private boolean isFirstLoading;

    private BaseView baseView;
    private BaseAdapter adapter;
    private View containerView;

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);

        stockCardID = activity.getIntent().getLongExtra(Constants.PARAM_STOCK_CARD_ID, 0);
        if (activity instanceof BaseView) {
            baseView = (BaseView) activity;
        } else {
            throw new ClassCastException("Host Activity should implements LoadingView method");
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        presenter.setStockCardId(stockCardID);
    }

    @Override
    public Presenter initPresenter() {
        return presenter;
    }

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        containerView = inflater.inflate(R.layout.fragment_stock_movement_history, container, false);
        return containerView;
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        initUI();
        if (this.isSavedInstanceState) {
            addFooterViewIfMoreThanOneScreen();
        } else {
            initData();
        }
    }

    private void initUI() {
        adapter = new StockMovementHistoryAdapter(presenter.getStockMovementModelList());
        historyListView.setAdapter(adapter);

        swipeRefreshLayout.setOnRefreshListener(this);

        if (!SharedPreferenceMgr.getInstance().hasDeletedOldStockMovement()) {
            tvArchivedOldData.setVisibility(View.GONE);
        }
    }


    public void initData() {
        isFirstLoading = true;
        baseView.loading();
        swipeRefreshLayout.post(new Runnable() {
            @Override
            public void run() {
                swipeRefreshLayout.setRefreshing(true);
                loadData();
            }
        });
    }

    @Override
    public void onRefresh() {
        if (!isLoading) {
            loadData();
        }
    }

    private void loadData() {
        isLoading = true;
        presenter.loadStockMovementViewModels(startIndex);
        startIndex += StockMovementHistoryPresenter.MAXROWS;
    }

    @Override
    public void refreshStockMovement(boolean hasNewData) {
        if (hasNewData) {
            adapter.notifyDataSetChanged();
            if (isFirstLoading) {
                firstLoadingScrollToBottom();
                isFirstLoading = false;
            }
        } else {
            ToastUtil.showInCenter(R.string.hint_has_not_new_data);
            baseView.loaded();
        }
        isLoading = false;
        swipeRefreshLayout.setRefreshing(false);
    }

    private void firstLoadingScrollToBottom() {
        addFooterViewIfMoreThanOneScreen();
        historyListView.post(new Runnable() {
            @Override
            public void run() {
                historyListView.setSelection(historyListView.getCount() - 1);
                baseView.loaded();
            }
        });
    }

    private void addFooterViewIfMoreThanOneScreen() {
        historyListView.post(new Runnable() {
                                 @Override
                                 public void run() {
                                     if (isGreaterThanOneScreen()) {
                                         addFooterView();
                                     }
                                 }
                             }
        );
    }

    private void addFooterView() {
        TextView view = new TextView(getActivity());
        view.setLayoutParams(new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT, 150));
        if (historyListView.getFooterViewsCount() == 0) {
            historyListView.addFooterView(view);
        }
    }

    private boolean isGreaterThanOneScreen() {
        return historyListView.getChildCount() < historyListView.getCount();
    }

}