Synnefo » Pithos Web Client

/*

 * Copyright 2011-2013 GRNET S.A. All rights reserved.

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 * Redistribution and use in source and binary forms, with or

 * without modification, are permitted provided that the following

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 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

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package gr.grnet.pithos.web.client.mysharedtree;

import gr.grnet.pithos.web.client.Const;

import gr.grnet.pithos.web.client.FolderContextMenu;

import gr.grnet.pithos.web.client.Pithos;

import gr.grnet.pithos.web.client.foldertree.AccountResource;

import gr.grnet.pithos.web.client.foldertree.File;

import gr.grnet.pithos.web.client.foldertree.Folder;

import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView.Templates;

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

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

import java.util.Iterator;

import com.google.gwt.cell.client.AbstractCell;

import com.google.gwt.cell.client.Cell;

import com.google.gwt.cell.client.ValueUpdater;

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

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

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

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

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

import com.google.gwt.safehtml.shared.SafeHtmlBuilder;

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

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

import com.google.gwt.view.client.ListDataProvider;

import com.google.gwt.view.client.SingleSelectionModel;

import com.google.gwt.view.client.TreeViewModel;

public class MysharedTreeViewModel implements TreeViewModel {

    protected Pithos app;

    Folder dummy = new Folder("No files shared by me");

    private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) {

       @Override

        public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {

           if (!folder.equals(dummy)) {

                   String html = AbstractImagePrototype.create(MysharedTreeView.images.folderYellow()).getHTML();

                    safeHtmlBuilder.appendHtmlConstant(html).appendHtmlConstant(" ");

           }

            safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));

        }

       @Override

       public void onBrowserEvent(Context context, com.google.gwt.dom.client.Element parent, final Folder folder, com.google.gwt.dom.client.NativeEvent event, ValueUpdater<Folder> valueUpdater) {

           if (event.getType().equals(ContextMenuEvent.getType().getName())) {

                   final int x = event.getClientX();

                   final int y = event.getClientY();

               MysharedTreeViewModel.this.selectionModel.setSelected(folder, true);

               app.scheduleFolderHeadCommand(folder, new Command() {

                                        @Override

                                        public void execute() {

                                FolderContextMenu menu = new FolderContextMenu(app, MysharedTreeView.images, app.getSelectedTree(), folder);

                                menu.setPopupPosition(x, y);

                                menu.show();

                                        }

                                });

           }

       }

    };

    protected ListDataProvider<Folder> firstLevelDataProvider = new ListDataProvider<Folder>();

    protected SingleSelectionModel<Folder> selectionModel;

    public MysharedTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {

        app = _app;

        this.selectionModel = selectionModel;

    }

    @Override

    public <T> NodeInfo<?> getNodeInfo(T value) {

        if (value == null) {

                fetchSharedContainers(null);

                if (firstLevelDataProvider.getList().get(0).equals(dummy))

                return new DefaultNodeInfo<Folder>(firstLevelDataProvider, folderCell, null, null);

            return new DefaultNodeInfo<Folder>(firstLevelDataProvider, folderCell, selectionModel, null);

        }

        return null;

    }

        private void fetchSharedContainers(final Command callback) {

        app.LOG("MysharedTreeViewModel::fetchSharedContainers(), callback=", callback);

        String path = "?format=json&shared=&public=";

        GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, Pithos.getStorageAPIURL(), app.getUserID(), path) {

            @Override

            public void onSuccess(final AccountResource _result) {

                                firstLevelDataProvider.getList().clear();

                for (Folder c : _result.getContainers()) {

                        if (c.isHome())

                                firstLevelDataProvider.getList().add(0, c); //Pithos is always first

                        else if (!c.isTrash())

                                firstLevelDataProvider.getList().add(c);

                }

                if (firstLevelDataProvider.getList().isEmpty())

                        firstLevelDataProvider.getList().add(dummy);

                                if (callback != null) {

                    app.LOG("MysharedTreeViewModel::fetchSharedContainers(), executing callback");

                    callback.execute();

                }

            }

            @Override

            public void onError(Throwable t) {

                GWT.log("Error getting account", t);

                                app.setError(t);

                if (t instanceof RestException)

                    app.displayError("Error getting account: " + ((RestException) t).getHttpStatusText());

                else

                    app.displayError("System error fetching user data: " + t.getMessage());

            }

                        @Override

                        protected void onUnauthorized(Response response) {

                                app.sessionExpired();

                        }

        };

        getAccount.setHeader(Const.X_AUTH_TOKEN, app.getUserToken());

        Scheduler.get().scheduleDeferred(getAccount);

        }

        @Override

    public boolean isLeaf(Object o) {

                if (o == null)

                        return firstLevelDataProvider.getList().isEmpty();

                return true;

    }

    protected void fetchFolder(final Iterator<Folder> iter, final Command callback) {

        app.LOG("MysharedTreeViewModel::fetchFolder(), iter=", iter.hasNext(), ", callback=", callback);

        if (iter.hasNext()) {

            final Folder f = iter.next();

            String path = "/" + f.getContainer() + "?format=json&shared=&public=&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());

            GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, Pithos.getStorageAPIURL(), f.getOwnerID(), path, f) {

                @Override

                public void onSuccess(Folder _result) {

                    fetchFolder(iter, callback);

                }

                @Override

                public void onError(Throwable t) {

                    GWT.log("Error getting folder", t);

                                        app.setError(t);

                    if (t instanceof RestException)

                        app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());

                    else

                        app.displayError("System error fetching folder: " + t.getMessage());

                }

                                @Override

                                protected void onUnauthorized(Response response) {

                                        app.sessionExpired();

                                }

            };

            getFolder.setHeader(Const.X_AUTH_TOKEN, app.getUserToken());

            Scheduler.get().scheduleDeferred(getFolder);

        }

        else if(callback != null) {

            callback.execute();

        }

    }

    public Folder getSelection() {

        return selectionModel.getSelectedObject();

    }

    public void updateFolder(Folder folder, boolean showfiles, Command callback) {

        fetchFolder(folder, showfiles, callback);

    }

    public void fetchFolder(final Folder f, final boolean showfiles, final Command callback) {

        app.LOG("MysharedTreeViewModel::fetchFolder(), folder=", f, ", showfiles=", showfiles, ", callback=", callback);

        String path = "/" + f.getContainer() + "?format=json&shared=&public=" + URL.encodeQueryString(f.getPrefix());

        GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, Pithos.getStorageAPIURL(), f.getOwnerID(), path, f) {

            @Override

            public void onSuccess(final Folder _result) {

                    for (File file : _result.getFiles()) {

                            String name = file.getName();

                                        if (name.lastIndexOf("/") != -1) {

                                                file.setName(name.substring(name.lastIndexOf("/") + 1, name.length()));

                                        }

                    }

                if (showfiles)

                    app.showFiles(_result);

                if (callback != null)

                        callback.execute();

            }

            @Override

            public void onError(Throwable t) {

                GWT.log("Error getting folder", t);

                                app.setError(t);

                if (t instanceof RestException)

                    app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());

                else

                    app.displayError("System error fetching folder: " + t.getMessage());

            }

                        @Override

                        protected void onUnauthorized(Response response) {

                                app.sessionExpired();

                        }

        };

        getFolder.setHeader("X-Auth-Token", app.getUserToken());

        Scheduler.get().scheduleDeferred(getFolder);

    }

        public void initialize(Command callback) {

                fetchSharedContainers(callback);

        }

}