ActionFactory.java

package gsingh.learnkirtan.ui.action;

import gsingh.learnkirtan.FileManager;
import gsingh.learnkirtan.FileManager.SaveResult;
import gsingh.learnkirtan.shabad.Shabad;
import gsingh.learnkirtan.shabad.ShabadMetaData;
import gsingh.learnkirtan.ui.shabadeditor.ShabadEditor;
import gsingh.learnkirtan.ui.shabadeditor.SwingShabadEditor;
import gsingh.learnkirtan.utility.DialogUtility;

import java.awt.event.ActionEvent;
import java.io.IOException;

import javax.swing.AbstractAction;
import javax.swing.Action;

public class ActionFactory {

	private ShabadEditor shabadEditor;
	private FileManager fileManager;

	public ActionFactory(ShabadEditor e, FileManager f) {
		shabadEditor = e;
		fileManager = f;
	}

	public Action newSaveAction() {
		return new SaveAction();
	}

	public Action newOpenAction() {
		return new OpenAction();
	}

	public Action newCreateAction() {
		return new CreateAction();
	}

	public Action newPropertiesAction() {
		return new PropertiesAction();
	}

	@SuppressWarnings("serial")
	private class SaveAction extends AbstractAction {
		@Override
		public void actionPerformed(ActionEvent event) {
			if (shabadEditor.isValidShabad()) {
				try {
					if (shabadEditor.isModified()) {
						SaveResult result = fileManager.saveShabad(shabadEditor
								.getShabad());
						if (result != SaveResult.NOT_SAVED_CANCELLED) {
							if (shabadEditor instanceof SwingShabadEditor) {
								SwingShabadEditor editor = (SwingShabadEditor) shabadEditor;
								editor.reset();
							}
						}
					}
				} catch (IOException e) {
					e.printStackTrace();
				}
			} else {
				DialogUtility.showInvalidShabadDialog();
			}
		}
	}

	/**
	 * Prompts the user if they would like to save and saves if accepted
	 * 
	 * @return a {@code SaveResult} describing the action taken
	 * @throws IOException
	 */
	private SaveResult safeSave(Shabad shabad) throws IOException {

		int result = DialogUtility.showSaveDialog();
		if (DialogUtility.isCancelledOrClosed(result))
			return SaveResult.NOT_SAVED_CANCELLED;

		if (DialogUtility.isYes(result)) {
			if (shabadEditor.isValidShabad()) {
				return fileManager.saveShabad(shabad);
			} else {
				return SaveResult.NOT_SAVED_INVALID_SHABAD;
			}
		}

		return SaveResult.NOT_SAVED;
	}

	@SuppressWarnings("serial")
	private class OpenAction extends AbstractAction {
		@Override
		public void actionPerformed(ActionEvent event) {
			try {
				// Save file if modified
				SaveResult result = null;
				if (shabadEditor.isModified()) {
					result = safeSave(shabadEditor.getShabad());
				}

				if (result != SaveResult.NOT_SAVED_INVALID_SHABAD) {
					// Open file if not cancelled
					if (result != SaveResult.NOT_SAVED_CANCELLED) {
						if (fileManager.openFile(shabadEditor)) {
							if (shabadEditor instanceof SwingShabadEditor) {
								SwingShabadEditor editor = (SwingShabadEditor) shabadEditor;
								editor.reset();
							}
						}
					}
				} else {
					DialogUtility.showInvalidShabadDialog();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

	@SuppressWarnings("serial")
	private class CreateAction extends AbstractAction {
		@Override
		public void actionPerformed(ActionEvent event) {
			try {
				// Save file if modified
				SaveResult result = null;
				if (shabadEditor.isModified()) {
					result = safeSave(shabadEditor.getShabad());
				}

				if (result != SaveResult.NOT_SAVED_INVALID_SHABAD) {
					// Create new file if not cancelled
					if (result != SaveResult.NOT_SAVED_CANCELLED) {
						shabadEditor.setShabad(new Shabad(""));
						fileManager.newFile();
						if (shabadEditor instanceof SwingShabadEditor) {
							SwingShabadEditor editor = (SwingShabadEditor) shabadEditor;
							editor.reset();
						}
					}
				} else {
					DialogUtility.showInvalidShabadDialog();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

	@SuppressWarnings("serial")
	public class PropertiesAction extends AbstractAction {
		@Override
		public void actionPerformed(ActionEvent event) {
			DialogUtility.showMetaDataDialog(shabadEditor.getMetaData(),
					new MetaDataDialogCallback());
		}

		public class MetaDataDialogCallback {
			public void completed(ShabadMetaData data) {
				shabadEditor.setMetaData(data);
			}
		}
	}
}