MenuListingAdapter.java

package de.ironjan.mensaupb.menus_ui;


import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.BaseColumns;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.View;
import android.view.ViewGroup;

import java.util.Locale;

import de.ironjan.mensaupb.R;
import de.ironjan.mensaupb.prefs.AllergenFilterPrefs_;
import de.ironjan.mensaupb.stw.rest_api.StwMenu;
import de.ironjan.mensaupb.sync.MenuContentProvider;
import se.emilsjolander.stickylistheaders.StickyListHeadersAdapter;

/**
 * An adapter to load the list of menus for a MenuListingFragment.
 */
public class MenuListingAdapter extends SimpleCursorAdapter implements android.support.v4.app.LoaderManager.LoaderCallbacks<Cursor>, StickyListHeadersAdapter {
    public static final String[] PROJECTION = {
            StwMenu.NAME_GERMAN, // 0
            StwMenu.STUDENTS_PRICE, // 1
            StwMenu.PRICE_TYPE, // 2
            StwMenu.BADGES, // 3
            StwMenu.CATEGORY_DE, // 4
            StwMenu.NAME_EN, // 5
            StwMenu.CATEGORY_EN, // 6
            BaseColumns._ID}; // 7
    public static final int CATEGORY_EN_INDEX = 6, CATEGORY_DE_INDEX = 4, NAME_EN_INDEX = 5, NAME_DE_INDEX = 0;
    private static final String MENU_SELECTION = StwMenu.DATE + " = ? AND " + StwMenu.RESTAURANT + " LIKE ?";
    private static final int[] BIND_TO = {R.id.textName, R.id.textPrice, R.id.textPricePer100g, R.id.textBadges};
    private final String mDate;
    private final String mLocation;
    private final AllergenFilterPrefs_ mAllergenFilterPrefs;
    private String[] listProjection = PROJECTION;

    public MenuListingAdapter(Context context, String argDate, String argLocation) {
        super(context, R.layout.view_menu_list_item,
                null, PROJECTION, BIND_TO, 0);
        this.mContext = context;
        this.mDate = argDate;
        this.mLocation = argLocation;
        mAllergenFilterPrefs = new AllergenFilterPrefs_(context);
    }


    @Override
    public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
        String[] projection = listProjection;

        final String[] selectionArgs = {mDate, mLocation};

        final Uri menuUri;
        menuUri = MenuContentProvider.MENU_URI;

        return new CursorLoader(mContext,
                menuUri, projection, MENU_SELECTION, selectionArgs, null);
    }

    @Override
    public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) {
        swapCursor(cursor);
    }

    @Override
    public void onLoaderReset(Loader<Cursor> cursorLoader) {
    }

    @Override
    public View getHeaderView(int pos, View convertView, ViewGroup parent) {
        String categoryOfPosition = getLocalizedCategoryOfPosition(pos);
        MenuListingHeaderView view;
        if (convertView == null) {
            view = MenuListingHeaderView_.build(mContext);
        } else {
            view = (MenuListingHeaderView) convertView;
        }
        view.setText(categoryOfPosition);

        return view;
    }

    @Override
    public long getHeaderId(int pos) {
        String category = getLocalizedCategoryOfPosition(pos);
        return category.hashCode();
    }

    private String getLocalizedCategoryOfPosition(int pos) {
        // fixme can this be replaced with category id?
        Cursor cursor = getCursor();
        cursor.moveToPosition(pos);

        boolean isEnglish = Locale.getDefault().getLanguage().startsWith(Locale.ENGLISH.toString());
        if (isEnglish) {
            return cursor.getString(CATEGORY_EN_INDEX);
        }
        return cursor.getString(CATEGORY_DE_INDEX);
    }
}