EditAuthorList.java

/*
 * @copyright 2011 Philip Warner
 * @license GNU General Public License
 * 
 * This file is part of Book Catalogue.
 *
 * Book Catalogue 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.
 *
 * Book Catalogue 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Book Catalogue.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.eleybourn.bookcatalogue;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.eleybourn.bookcatalogue.utils.Logger;
import com.eleybourn.bookcatalogue.utils.Utils;

/**
 * Activity to edit a list of authors provided in an ArrayList<Author> and
 * return an updated list.
 * 
 * @author Philip Warner
 */
public class EditAuthorList extends EditObjectList<Author> {

	/**
	 * Constructor; pass the superclass the main and row based layouts to use.
	 */
	public EditAuthorList() {
		super(CatalogueDBAdapter.KEY_AUTHOR_ARRAY, R.layout.edit_author_list, R.layout.row_edit_author_list);
	}

	@Override
	protected void onSetupView(View target, Author object) {
		if (object != null) {
			TextView at = (TextView) target.findViewById(R.id.row_author);
			if (at != null) {
				at.setText(object.getDisplayName());
			}
			at = (TextView) target.findViewById(R.id.row_author_sort);
			if (at != null) {
				at.setText(object.getSortName());
			}
		}
	};
	
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		try {
			// Setup autocomplete for author name
			ArrayAdapter<String> author_adapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, mDbHelper.getAllAuthors());
			((AutoCompleteTextView)this.findViewById(R.id.author)).setAdapter(author_adapter);
		} catch (Exception e) {
			Logger.logError(e);
		}
	}

	/**
	 * Do the work of the onClickListener for the 'Add' button.
	 *
	 * @param v
	 */
	protected void onAdd(View v) {
		// Get the text
		AutoCompleteTextView t = ((AutoCompleteTextView)EditAuthorList.this.findViewById(R.id.author));
		String s = t.getText().toString().trim();
		if (s.length() > 0) {
			// Get an author and try to find in DB.
			Author a = new Author(t.getText().toString());
			a.id = mDbHelper.lookupAuthorId(a);

			//
			boolean foundMatch = false;
			for(int i = 0; i < mList.size() && !foundMatch; i++) {
				if (a.id != 0L) {
					if (mList.get(i).id == a.id)
						foundMatch = true;
				} else {
					if (a.getDisplayName().equals(mList.get(i).getDisplayName()))
						foundMatch = true;
				}
			}
			if (foundMatch) {
				Toast.makeText(EditAuthorList.this, getResources().getString(R.string.author_already_in_list), Toast.LENGTH_LONG).show();						
				return;							
			}

			mList.add(a);
			mAdapter.notifyDataSetChanged();
			t.setText("");
		} else {
			Toast.makeText(EditAuthorList.this, getResources().getString(R.string.author_is_blank), Toast.LENGTH_LONG).show();
		}		
	}

	@Override
	protected void onRowClick(View target, int position, final Author object) {
		editAuthor(object);
	}

	private void editAuthor(final Author author) {
		final Dialog dialog = new Dialog(this);
		dialog.setContentView(R.layout.edit_author);
		dialog.setTitle(R.string.edit_author_details);
		EditText familyView = (EditText) dialog.findViewById(R.id.family_name);
		EditText givenView = (EditText) dialog.findViewById(R.id.given_names);
		familyView.setText(author.familyName);
		givenView.setText(author.givenNames);

		Button saveButton = (Button) dialog.findViewById(R.id.confirm);
		saveButton.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				EditText familyView = (EditText) dialog.findViewById(R.id.family_name);
				EditText givenView = (EditText) dialog.findViewById(R.id.given_names);
				String newFamily = familyView.getText().toString().trim();
				if (newFamily == null || newFamily.length() == 0) {
					Toast.makeText(EditAuthorList.this, R.string.author_is_blank, Toast.LENGTH_LONG).show();
					return;
				}
				String newGiven = givenView.getText().toString();
				Author newAuthor = new Author(newFamily, newGiven);
				dialog.dismiss();
				confirmEditAuthor(author, newAuthor);
			}
		});
		Button cancelButton = (Button) dialog.findViewById(R.id.cancel);
		cancelButton.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				dialog.dismiss();
			}
		});
		
		dialog.show();
	}
	
	private void confirmEditAuthor(final Author oldAuthor, final Author newAuthor) {
		// First, deal with a some special cases...
		
		// Case: Unchanged.
		if (newAuthor.familyName.compareTo(oldAuthor.familyName) == 0 
				&& newAuthor.givenNames.compareTo(oldAuthor.givenNames) == 0) {
			// No change; nothing to do
			return;
		}

		// Get the new author ID
		oldAuthor.id = mDbHelper.lookupAuthorId(oldAuthor);
		newAuthor.id = mDbHelper.lookupAuthorId(newAuthor);

		// See if the old author is used in any other books.
		long nRefs = mDbHelper.getAuthorBookCount(oldAuthor) + mDbHelper.getAuthorAnthologyCount(oldAuthor);
		boolean oldHasOthers = nRefs > (mRowId == 0 ? 0 : 1);

		// Case: author is the same, or is only used in this book
		if (newAuthor.id == oldAuthor.id || !oldHasOthers) {
			// Just update with the most recent spelling and format
			oldAuthor.copyFrom(newAuthor);
			Utils.pruneList(mDbHelper, mList);
			mDbHelper.sendAuthor(oldAuthor);
			mAdapter.notifyDataSetChanged();
			return;
		}

		// When we get here, we know the names are genuinely different and the old author is used in more than one place.
		String format = getResources().getString(R.string.changed_author_how_apply);
		String allBooks = getResources().getString(R.string.all_books);
		String thisBook = getResources().getString(R.string.this_book);
		String message = String.format(format, oldAuthor.getSortName(), newAuthor.getSortName(), allBooks);
		final AlertDialog alertDialog = new AlertDialog.Builder(this).setMessage(message).create();

		alertDialog.setTitle(getResources().getString(R.string.scope_of_change));
		alertDialog.setIcon(android.R.drawable.ic_menu_info_details);
		alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, thisBook, new DialogInterface.OnClickListener() {
			public void onClick(DialogInterface dialog, int which) {
				oldAuthor.copyFrom(newAuthor);
				Utils.pruneList(mDbHelper, mList);
				mAdapter.notifyDataSetChanged();
				alertDialog.dismiss();
			}
		}); 

		alertDialog.setButton(DialogInterface.BUTTON_NEGATIVE, allBooks, new DialogInterface.OnClickListener() {
			public void onClick(DialogInterface dialog, int which) {
				mDbHelper.globalReplaceAuthor(oldAuthor, newAuthor);
				oldAuthor.copyFrom(newAuthor);
				Utils.pruneList(mDbHelper, mList);
				mAdapter.notifyDataSetChanged();
				alertDialog.dismiss();
			}
		}); 

		alertDialog.show();
	}
	
	@Override
	protected boolean onSave(Intent intent) {
		final AutoCompleteTextView t = ((AutoCompleteTextView)EditAuthorList.this.findViewById(R.id.author));
		Resources res = this.getResources();
		String s = t.getText().toString().trim();
		if (s.length() > 0) {
			final AlertDialog alertDialog = new AlertDialog.Builder(this).setMessage(res.getText(R.string.unsaved_edits)).create();
			
			alertDialog.setTitle(res.getText(R.string.unsaved_edits_title));
			alertDialog.setIcon(android.R.drawable.ic_menu_info_details);
			alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, res.getText(R.string.yes), new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog, int which) {
					t.setText("");
					findViewById(R.id.confirm).performClick();
				}
			}); 
			
			alertDialog.setButton(DialogInterface.BUTTON_NEGATIVE, res.getText(R.string.no), new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog, int which) {
					//do nothing
				}
			}); 
			
			alertDialog.show();
			return false;
		} else {
			return true;
		}
	};
}