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package uk.org.ury.library.viewer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import uk.org.ury.client.Client;
import uk.org.ury.config.ConfigReader;
import uk.org.ury.database.DatabaseDriver;
import uk.org.ury.database.UserClass;
import uk.org.ury.database.exceptions.MissingCredentialsException;
import uk.org.ury.database.exceptions.QueryFailureException;
import uk.org.ury.frontend.AbstractFrontendModule;
import uk.org.ury.frontend.FrontendMaster;
import uk.org.ury.frontend.FrontendModulePanel;
import uk.org.ury.frontend.exceptions.UICreationFailureException;
import uk.org.ury.library.exceptions.EmptySearchException;
import uk.org.ury.library.item.LibraryItem;
import uk.org.ury.library.item.LibraryItemProperty;
import uk.org.ury.server.protocol.DecodeFailureException;
import uk.org.ury.server.protocol.Directive;
import uk.org.ury.server.protocol.Status;
/**
* Module for investigating the track library.
*
* @author Matt Windsor
*
*/
public class LibraryViewer extends AbstractFrontendModule
{
/**
*
*/
private static final long serialVersionUID = -2782366476480563739L;
private List<LibraryItem> libraryList;
private LibraryViewerPanel panel;
private ConfigReader config;
/**
* Construct a new LibraryViewer as a frontend object.
*/
public
LibraryViewer ()
{
try
{
config = new ConfigReader ("res/conf.xml");
}
catch (MissingCredentialsException e)
{
System.out.println(e);
}
libraryList = new ArrayList<LibraryItem> ();
panel = null;
}
/**
* Run the library viewer frontend.
*/
public FrontendModulePanel
runFrontend (FrontendMaster master)
{
dd = null;
try
{
dd = new DatabaseDriver (config, UserClass.READ_ONLY);
}
catch (MissingCredentialsException e)
{
// TODO: Privilege de-escalation
master.fatalError (e.getMessage ());
}
catch (Exception f)
{
master.fatalError (f.getMessage ());
}
try
{
panel = new LibraryViewerPanel (this, master);
}
catch (UICreationFailureException e)
{
master.fatalError (e.getMessage ());
}
return panel;
}
/**
* Do a library search.
*
* This will update the library list to reflect the results of the
* search.
*
* @param search The string fragment to use in searches.
* Cannot be empty or null.
*
* @throws EmptySearchException if the search string is
* empty or null (from LibraryUtils.search).
*
* @throws QueryFailureException if the search query
* fails (from LibraryUtils.search).
*/
public void
doSearch (String search)
throws EmptySearchException, QueryFailureException
{
// TODO: fan out?
Client cl = new Client ();
Map<?, ?> response = null;
libraryList.clear ();
try
{
response = cl.get ("/library/LibraryRequestHandler?function=search&search=" + search);
}
catch (DecodeFailureException e)
{
throw new QueryFailureException (e.getMessage ());
}
// Check to see if this is Map<String, ?> by looking for the status,
// which should always be in a valid response.
if (response.containsKey (Directive.STATUS.toString ()) == false
|| (response.get (Directive.STATUS.toString ()) instanceof String) == false)
throw new QueryFailureException ("Status not provided.");
if (((String) response.get (Directive.STATUS.toString ()))
.equals (Status.OK.toString ()) == false)
throw new QueryFailureException ((String) response.get (Directive.REASON.toString ()));
// Should contain a list of items, even if there are no items.
if (response.containsKey (Directive.ITEMS.toString ()) == false)
throw new QueryFailureException ("No item set returned.");
if ((response.get (Directive.ITEMS.toString ()) instanceof List<?>) == false)
throw new QueryFailureException ("Malformed item list.");
for (Object obj : (List<?>) response.get (Directive.ITEMS.toString ()))
{
Map<LibraryItemProperty, String> properties
= new HashMap<LibraryItemProperty, String> ();
if (obj instanceof Map<?, ?> == false)
throw new QueryFailureException ("Malformed item.");
Set<?> keySet = ((Map<?, ?>) obj).keySet ();
// Check to make sure this item has only String-String mappings.
for (Object key : keySet)
{
if ((key instanceof String
&& ((Map<?, ?>) obj).get (key) instanceof String)
== false)
throw new QueryFailureException ("Not a valid property.");
else if (LibraryItemProperty.valueOf ((String) key) == null)
throw new QueryFailureException ("Property type "
+ key + " not recognised.");
else
properties.put (LibraryItemProperty.valueOf ((String) key),
(String) ((Map<?, ?>) obj).get (key));
}
libraryList.add (new LibraryItem (properties));
}
//libraryList = LibraryUtils.search (dd, search);
}
/**
* @return the current library list.
*/
public List<LibraryItem>
getLibraryList ()
{
return libraryList;
}
}
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