~azzar1/unity/add-show-desktop-key

/* IVLE

 * Copyright (C) 2007-2008 The University of Melbourne

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

/* Module: SpecialHome (File Browser, client)

 * Author: David Coles

 * Date: 23/7/2008

 */

/* This module implements the functionality to lay out a special home directory 

 * view on top of the normal listing

 */

/* The name of the personal file directory */

PERSONALDIR="mywork"

/* LAYOUT FUNCTIONS */

/** Present special home directory. This is only called if in the top level.

 * Subjects must not be null.

 */

function special_home_listing(listing, subjects, path)

{

    /* Nav through the top-level of the JSON to the actual listing object. */

    var listing = listing.listing;

    var filetablediv = document.getElementById("filetablediv");

    var specialhomediv;

    var h2;

    var h3;

    var ul;

    var li;

    var div;

    /* Wrap all this "special" stuff in a div, for styling purposes */

    specialhomediv = document.createElement("div");

    specialhomediv.setAttribute("id", "specialhome");

    filetablediv.appendChild(specialhomediv);

    /* SUBJECTS Section

    /* Create the header row */

    if (subjects.length > 0)

    {

        h2 = dom_make_text_elem("h2", "Subjects");

        specialhomediv.appendChild(h2);

    }

    /* Create the contents */

    for (var i=0; i<subjects.length; i++)

    {

        var subject = subjects[i];

        var subjpath = subject.subj_short_name;

        // Header, with link to offering home page.

        h3 = $('<h3><span class="subjname"></span><span style="font-weight: normal"><span class="semester"></span> &ndash; <a class="subjectaction">Subject home</a></span>');

        h3.find('.subjname').text(subject.subj_name);

        /* Non-current offerings need to show the semester, to avoid confusion

         * about which offering we are talking about */

        if (subject.state != "current")

        {

            h3.find('.semester').text(" (" + subject.year + ", semester "

                                      + subject.semester + ")");

        }

        h3.find('a').attr('href', subject.url);

        $(specialhomediv).append(h3);

        /* Print the file listing */

        ul = document.createElement("ul");

        // Stuff

        ul.appendChild(make_subject_item(subjpath,

            path_join("users", username, subjpath), PERSONALDIR,

            "Your own files in this subject"));

        // Groups

        var groups = subject.groups;

        for (var j=0; j<subject.groups.length; j++)

        {

            var group = subject.groups[j];

            ul.appendChild(make_subject_item(subjpath,

                path_join("groups", subject.subj_short_name + "_" +

                          subject.year + "_" + subject.semester + "_" +

                          group.name),

                group.name,

                "This group's files in this subject"));

        }

        specialhomediv.appendChild(ul);

        /* Remove it from listing */

        if (subject.subj_short_name in listing)

            delete listing[subject.subj_short_name];

    }

    /* FIXME: Old Subjects? */

    /* STUFF Section -- For the stuff directory */

    /* Create the header */

    h2 = dom_make_text_elem("h2", "Stuff");

    specialhomediv.appendChild(h2);

    /* Create the contents */

    ul = document.createElement("ul");

    ul.appendChild(make_subject_item("",

          path_join("users", username, "stuff"), "stuff",

          "Your own files not related to a subject"));

    specialhomediv.appendChild(ul);

    /* Remove stuff from the listing */

    if ("stuff" in listing)

        delete listing["stuff"];

    /* JUNK Section -- All the rest */

    /* Create the header row */

    if (obj_length(listing) > 0)

    {

        h2 = dom_make_text_elem("h2", "Junk");

        specialhomediv.appendChild(h2);

        handle_dir_listing(path, listing);

    }

}

/* Does an series of AJAX requests to find out the properties of this folder 

 * and then updates the folder view

 */

function make_subject_item(path, repopath, name, description)

{

    // Create the temporary item

    var li = document.createElement("li");

    var span;

    li.setAttribute("class", "listing-loading");

    li.appendChild(dom_make_text_elem("span", name, description));

    span = dom_make_text_elem("loading...");

    span.setAttribute("class","status");

    li.appendChild(span);

    // Set the callback function to update when we get the real details

    var callback = function(response)

    {

        var sublisting = decode_response(response);

        dom_removechildren(li);

        li.setAttribute("class", "listing-dir");

        // If we could find the file status...

        if (sublisting != null)

        {

            var thisdir = sublisting.listing['.'];

            var versioned = ("svnstatus" in thisdir) && (thisdir.svnstatus != "unversioned");

            if (versioned)

            {

                // Default: Just offer a link to the directory

                li.appendChild(dom_make_link_elem("span", name, description,

                    app_path(this_app, username, path, name)));

            }

            else

            {

                // Blocked: Offer to rename the directory

                li.appendChild(dom_make_text_elem("span", name, description));

                span = dom_make_text_elem("span", " (blocked) ",

                      "Another file or directory is in the way of this directory.");

                span.setAttribute("class", "status");

                li.appendChild(span);

                var button = document.createElement("input");

                $(button).click(function(event)

                {

                    action_rename(path_join(path, name));

                });

                button.setAttribute("type", "button");

                button.setAttribute("value", "Rename");

                span.appendChild(button);

            }

        }

        else if (response.status == 404)

        {

            // Missing: Try to check out or create the repository

            li.appendChild(dom_make_text_elem("span", name, description));

            span = dom_make_text_elem("span", " (missing) ",

                  "This directory does not yet exist.");

            span.setAttribute("class", "status");

            li.appendChild(span);

            var button = document.createElement("input");

            $(button).click(function(event)

            {

                li.setAttribute("class", "listing-loading");

                var localpath = path_join(path, name);

                if (create_if_needed(repopath))

                {

                    // Try a checkout

                    do_act("svncheckout", {"path": [repopath, localpath]});

                }

                else

                {

                    li.setAttribute("class", "listing-dir");

                }

            });

            button.setAttribute("type", "button");

            button.setAttribute("value", "Checkout");

            span.appendChild(button);

        }

        else

        {

            // Error: The directory listing could not be retrieved

            // Make a link in case the user wants to investigate

            li.appendChild(dom_make_link_elem("span", name, description,

                app_path(this_app, username, path, name)));

            span = dom_make_text_elem("span",

                  " (error \u2013 contact system administrator)",

                  "There was an error retrieving information about this "

                  + "directory.");

            span.setAttribute("class", "status");

            li.appendChild(span);

        }

    }

    /* Are we working in a subdirectory or parent? */

    ajax_call(callback, service_app, path_join(username, path, name), {}, "GET");

    return li;

}

function create_if_needed(path)

{

    response = ajax_call(null, service_app, current_path,

            {

                "action": "svnrepostat",

                "path": path

            }, "POST");

    if (response.status == 200)

    {

        return true;

    }

    else if (response.status == 404)

    {

        // Try a mkdir

        r2 = ajax_call(null, service_app, current_path,

                {

                    "action": "svnrepomkdir",

                    "path": path,

                    "logmsg": "Automated creation of '" + path + "' work directory"

                }, "POST");

        if (r2.status == 200)

        {

            return true;

        }

    }

    alert("Error: Could not create Subversion directory");

    return false;

}

/** Finds the length (number of user defined properties) of an object

 */

function obj_length(obj)

{

    len = 0;

    for (prop in obj)

        len++;

    return len;

}