Synnefo » Pithos

/*

 * Copyright (c) 2011 Greek Research and Technology Network

 */

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

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

import com.google.gwt.i18n.client.DateTimeFormat;

import com.google.gwt.i18n.client.DateTimeFormat.PredefinedFormat;

import com.google.gwt.json.client.JSONArray;

import com.google.gwt.json.client.JSONObject;

import com.google.gwt.json.client.JSONParser;

import com.google.gwt.json.client.JSONValue;

import java.util.Date;

import java.util.LinkedHashSet;

import java.util.Set;

public class Folder extends Resource {

    /*

     * The name of the folder. If the folder is a container this is its name. If it is a virtual folder this is the

     * last part of its path

     */

    private String name = null;

    private Date lastModified = null;

    private long bytesUsed = 0;

    private Set<Folder> subfolders = new LinkedHashSet<Folder>();

    /*

     * The name of the container that this folder belongs to. If this folder is container, this field equals name

     */

    private String container = null;

    /*

     * This is the full path of the folder (prefix is a misnomer but it was named so because this is used as a prefix=

     * parameter in the request that fetches its children). If the folder is a cointainer this is empty string

     */

    private String prefix = "";

    public Folder() {};

    public Folder(String name) {

        this.name = name;

    }

    public String getName() {

        return name;

    }

    public Date getLastModified() {

        return lastModified;

    }

    public long getBytesUsed() {

        return bytesUsed;

    }

    public void setLastModified(Date lastModified) {

        this.lastModified = lastModified;

    }

    public Set<Folder> getSubfolders() {

        return subfolders;

    }

    public void setSubfolders(Set<Folder> subfolders) {

        this.subfolders = subfolders;

    }

    public String getContainer() {

        return container;

    }

    public String getPrefix() {

        return prefix;

    }

    public void setPrefix(String prefix) {

        this.prefix = prefix;

    }

    public void populate(Response response) {

        String header = response.getHeader("Last-Modified");

        if (header != null)

            lastModified = DateTimeFormat.getFormat(PredefinedFormat.RFC_2822).parse(header);

        header = response.getHeader("X-Container-Bytes-Used");

        if (header != null)

            bytesUsed = Long.valueOf(header);

        JSONValue json = JSONParser.parseStrict(response.getText());

        JSONArray array = json.isArray();

        if (array != null) {

            for (int i=0; i<array.size(); i++) {

                JSONObject o = array.get(i).isObject();

                if (o != null) {

                    String contentType = unmarshallString(o, "content_type");

                    if (o.containsKey("subdir") || (contentType != null && contentType.startsWith("application/directory"))) {

                        Folder f = new Folder();

                        f.populate(o, container);

                        subfolders.add(f);

                    }

                    else {

                        // add file

                    }

                }

            }

        }

    }

    public void populate(JSONObject o, String aContainer) {

        String path = null;

        if (o.containsKey("subdir")) {

            path = unmarshallString(o, "subdir");

        }

        else {

            path = unmarshallString(o, "name");

            lastModified = unmarshallDate(o, "last_modified");

        }

        if (path.endsWith("/"))

            path = path.substring(0, path.length() - 1);

        if (path.contains("/"))

            name = path.substring(path.lastIndexOf("/") + 1, path.length()); //strip the prefix

        else

            name = path;

        if (aContainer != null) {

            container = aContainer;

            prefix = path;

        }

        else {

            container = name;

            prefix = "";

        }

    }

    @Override

    public String getLastModifiedSince() {

        return null;  //To change body of implemented methods use File | Settings | File Templates.

    }

    public static Folder createFromResponse(Response response, Folder result) {

        Folder f = null;

        if (result == null)

            f = new Folder();

        else

            f = result;

        f.populate(response);

        return f;

    }

    @Override

    public boolean equals(Object other) {

        if (other instanceof Folder) {

            Folder o = (Folder) other;

            if (container != null)

                return prefix.equals(o.getPrefix()) && container.equals(o.getContainer());

            else

                return o.getContainer() == null && name.equals(o.getName());

        }

        return false;

    }

    @Override

    public int hashCode() {

        return prefix.hashCode() + name.hashCode();

    }

}