Synnefo

import gr.grnet.pithos.web.client.rest.GetCommand;

import gr.grnet.pithos.web.client.rest.RestException;

import gr.grnet.pithos.web.client.rest.resource.GroupResource;

import gr.grnet.pithos.web.client.rest.resource.PermissionHolder;

import gr.grnet.pithos.web.client.rest.resource.UserResource;

import gr.grnet.pithos.web.client.rest.resource.UserSearchResource;

import com.google.gwt.core.client.GWT;

import com.google.gwt.event.dom.client.FocusEvent;

import com.google.gwt.event.dom.client.FocusHandler;

import com.google.gwt.event.dom.client.KeyUpEvent;

import com.google.gwt.event.dom.client.KeyUpHandler;

import com.google.gwt.http.client.URL;

import com.google.gwt.user.client.DeferredCommand;

import com.google.gwt.user.client.ui.MultiWordSuggestOracle;

import com.google.gwt.user.client.ui.SuggestBox;

	private MultiWordSuggestOracle oracle = new MultiWordSuggestOracle();

	private SuggestBox suggestBox = new SuggestBox(oracle);

	private String selectedUser = null;

	private List<GroupResource> groups;

	private CheckBox modifyACL = new CheckBox();

	private final PermissionsList permList;

	public PermissionsAddDialog(Pithos _app, List<GroupResource> _groups, PermissionsList _permList, boolean _userAdd) {

		groups = _groups;

		groupBox.getElement().setId("addPermission.dropDown");

		suggestBox.getElement().setId("addPermission.textBox");

		read.getElement().setId("addPermission.read");

		write.getElement().setId("addPermission.write");

		modifyACL.getElement().setId("addpermission.modify");

		for (GroupResource group : _groups)

			groupBox.addItem(group.getName(), group.getName());

		final VerticalPanel panel = new VerticalPanel();

		final HorizontalPanel buttons = new HorizontalPanel();

		setWidget(panel);

		final FlexTable permTable = new FlexTable();

		permTable.setText(0, 0, "Users/Groups");

		permTable.setText(0, 1, "Read");

		permTable.setText(0, 2, "Write");

		permTable.setText(0, 3, "Modify Access");

		permTable.getFlexCellFormatter().setStyleName(0, 0, "props-toplabels");

		permTable.getFlexCellFormatter().setStyleName(0, 1, "props-toplabels");

		permTable.getFlexCellFormatter().setStyleName(0, 2, "props-toplabels");

		permTable.getFlexCellFormatter().setStyleName(0, 3, "props-toplabels");

		if (userAdd) {

			suggestBox.getTextBox().addFocusHandler(new FocusHandler() {

				@Override

				public void onFocus(FocusEvent event) {

					if (selectedUser != null && selectedUser.endsWith("@"))

						updateSuggestions();

				}

			});

			suggestBox.addKeyUpHandler(new KeyUpHandler() {

				@Override

				public void onKeyUp(KeyUpEvent event) {

					// Ignore the arrow keys.

					int keyCode = event.getNativeKeyCode();

					if (keyCode == KeyCodes.KEY_UP ||

							keyCode == KeyCodes.KEY_DOWN ||

							keyCode == KeyCodes.KEY_LEFT ||

							keyCode == KeyCodes.KEY_RIGHT)

						return;

					if (keyCode==KeyCodes.KEY_ESCAPE) {

						suggestBox.hideSuggestionList();

						return;

					}

					String text = suggestBox.getText().trim();

					// Avoid useless queries for keystrokes that do not modify

					// the text.

					if (text.equals(selectedUser))

						return;

					selectedUser = text;

					// Go to the server only if the user typed the @ character.

					if (selectedUser.endsWith("@"))

						updateSuggestions();

				}

			});

			permTable.setWidget(1, 0, suggestBox);

		} else

			permTable.setWidget(1, 0, groupBox);

		permTable.setWidget(1, 1, read);

		permTable.setWidget(1, 2, write);

		permTable.setWidget(1, 3, modifyACL);

		permTable.getFlexCellFormatter().setStyleName(1, 0, "props-labels");

		permTable.getFlexCellFormatter().setHorizontalAlignment(1, 1, HasHorizontalAlignment.ALIGN_CENTER);

		permTable.getFlexCellFormatter().setHorizontalAlignment(1, 2, HasHorizontalAlignment.ALIGN_CENTER);

		permTable.getFlexCellFormatter().setHorizontalAlignment(1, 3, HasHorizontalAlignment.ALIGN_CENTER);

		panel.add(permTable);

		final Button ok = new Button("OK", new ClickHandler() {

			@Override

			public void onClick(ClickEvent event) {

				addPermission();

				hide();

			}

		});

		ok.getElement().setId("addPermission.button.ok");

		buttons.add(ok);

		buttons.setCellHorizontalAlignment(ok, HasHorizontalAlignment.ALIGN_CENTER);

		// Create the 'Cancel' button, along with a listener that hides the

		// dialog

		// when the button is clicked.

		final Button cancel = new Button("Cancel", new ClickHandler() {

			@Override

			public void onClick(ClickEvent event) {

				hide();

			}

		});

		cancel.getElement().setId("addPermission.button.cancel");

		buttons.add(cancel);

		buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);

		buttons.setSpacing(8);

		buttons.addStyleName("pithos-TabPanelBottom");

		panel.add(buttons);

		panel.addStyleName("pithos-TabPanelBottom");

		PermissionHolder perm = new PermissionHolder();

			selectedUser = suggestBox.getText();

			for(PermissionHolder p : permList.permissions)

				if (selectedUser.equals(p.getUser())){

					app.displayError("User already has access to the resource");

					return;

				}

			perm.setUser(selectedUser);

			String groupId = groupBox.getValue(groupBox.getSelectedIndex());

			GroupResource selected = null;

			for (GroupResource g : groups)

				if (g.getName().equals(groupId))

					selected = g;

			if (selected == null)

				return;

			for(PermissionHolder p : permList.permissions)

				if (selected.getName().equals(p.getGroup())){

					app.displayError("Group already has access to the resource");

					return;

				}

			perm.setGroup(selected.getName());

		boolean modifyValue = modifyACL.getValue();

		perm.setRead(readValue);

		perm.setWrite(writeValue);

		perm.setModifyACL(modifyValue);

		permList.addPermission(perm);

		permList.updateTable();

			suggestBox.setFocus(true);

	}

	/**

	 * Update the list of suggestions.

	 */

	protected void updateSuggestions() {

		String query = selectedUser.substring(0, selectedUser.length()-1);

		GWT.log("Searching for " + query, null);

		GetCommand<UserSearchResource> eg = new GetCommand<UserSearchResource>(app, UserSearchResource.class,

					app.getApiPath() + "users/" + URL.encodeComponent(query), false, null) {

			@Override

			public void onComplete() {

				suggestBox.hideSuggestionList();

				oracle.clear();

				UserSearchResource s = getResult();

				for (UserResource user : s.getUsers()) {

					GWT.log("Found " + user.getUsername(), null);

					oracle.add(user.getUsername());

				}

				suggestBox.showSuggestionList();

			}

			@Override

			public void onError(Throwable t) {

				if(t instanceof RestException)

					app.displayError("Unable to perform search: "+((RestException)t).getHttpStatusText());

				else

					app.displayError("System error while searching for users: "+t.getMessage());

				GWT.log("", t);

				DisplayHelper.log(t.getMessage());

			}

		};

		DeferredCommand.addCommand(eg);