<?php
// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC.  If not, see <http://www.gnu.org/licenses/>.


// display the contents of a thread.

require_once('../inc/util.inc');
require_once('../inc/forum.inc');
require_once('../inc/news.inc');

$threadid = get_int('id');
$sort_style = get_int('sort', true);
$temp_sort_style = get_int('temp_sort_style', true);
$start = get_int('start', true);
$postid = get_int('postid', true);
$filter = get_str('filter', true);

if ($filter != "false"){
    $filter = true;
} else {
    $filter = false;
}

$logged_in_user = get_logged_in_user(false);

$tokens = "";
if ($logged_in_user) {
    BoincForumPrefs::lookup($logged_in_user);
    $tokens = url_tokens($logged_in_user->authenticator);
}

if (DISABLE_FORUMS && !is_admin($logged_in_user)) {
    error_page("Forums are disabled");
}

if ($threadid < 1) {
    error_page("Invalid thread ID!");
}

$thread = BoincThread::lookup_id($threadid);
$forum = BoincForum::lookup_id($thread->forum);

if (!$thread) {
    error_page("Bad thread ID");
}

if (!is_forum_visible_to_user($forum, $logged_in_user)) {
    if ($logged_in_user) {
        remove_subscriptions_forum($logged_in_user->id, $forum->id);
    }
    error_page(tra("This forum is not visible to you."));
}

if ($thread->hidden) {
    if (!is_moderator($logged_in_user, $forum)) {
        if ($logged_in_user) {
            remove_subscriptions_forum($logged_in_user->id, $thread->id);
        }
        error_page(tra("This thread has been hidden by moderators."));
    }
}

$title = cleanup_title($thread->title);
if ($temp_sort_style) {
    $sort_style = $temp_sort_style;
} else if ($sort_style) {
    $forum_style = 0;   // this is deprecated
    if ($logged_in_user){
        $logged_in_user->prefs->thread_sorting = $sort_style;
        $logged_in_user->prefs->update("thread_sorting=$sort_style");
    } else {
        list($forum_style, $old_style) = parse_forum_cookie();
    }
    send_cookie('sorting',
        implode("|", array($forum_style, $sort_style)),
        true
    );
} else {
    // get the sorting style from the user or a cookie
    if ($logged_in_user){
        $sort_style = $logged_in_user->prefs->thread_sorting;
    } else {
        list($forum_style, $sort_style) = parse_forum_cookie();
    }
}

if ($logged_in_user && $logged_in_user->prefs->jump_to_unread){
    page_head($title, 'jumpToUnread();');
} else {
    page_head($title);
}

$is_subscribed = $logged_in_user && BoincSubscription::lookup($logged_in_user->id, $thread->id);

show_forum_header($logged_in_user);

echo "<p>";
switch ($forum->parent_type) {
case 0:
    $category = BoincCategory::lookup_id($forum->category);
    show_forum_title($category, $forum, $thread);
    break;
case 1:
    show_team_forum_title($forum, $thread);
    break;
}

if (false) {
if ($forum->parent_type == 0) {
    if ($category->is_helpdesk && !$thread->status){
        if ($logged_in_user){
            if ($thread->owner == $logged_in_user->id){
                if ($thread->replies !=0) {
                    // Show a "this question has been answered" to the author
                    echo "<p>";
                    show_button(
                        "forum_thread_status.php?id=$thread->id&action=set",
                        tra("My question was answered"),
                        tra("Click here if your question has been adequately answered") 
                    );
                }
            } else {
                // and a "I also got this question" to everyone else
                echo "<p>";
                show_button(
                    "forum_thread_vote.php?id=$thread->id",
                    tra("I've also got this question")
                );
            }
        }
    }
}
}

echo "
    <p>
    <form action=\"forum_thread.php\">
    <table width=\"100%\" cellspacing=0 cellpadding=0>
    <tr class=\"forum_toplinks\">
    <td>
";

$reply_url = "";
if (can_reply($thread, $forum, $logged_in_user)) {
    $reply_url = "forum_reply.php?thread=".$thread->id."#input";
    show_button(
        $reply_url,
        tra("Post to thread"),
        tra("Add a new message to this thread")
    );
}

if ($is_subscribed) {
    $type = NOTIFY_SUBSCRIBED_POST;
    BoincNotify::delete_aux(
        "userid=$logged_in_user->id and type=$type and opaque=$thread->id"
    );
    $url = "forum_subscribe.php?action=unsubscribe&amp;thread=".$thread->id."$tokens";
    show_button(
        $url,
        tra("Unsubscribe"),
        tra("You are subscribed to this thread.  Click here to unsubscribe.")
    );
} else {
    $url = "forum_subscribe.php?action=subscribe&amp;thread=".$thread->id."$tokens";
    show_button(
        $url,
        tra("Subscribe"),
        tra("Click to get email when there are new posts in this thread")
    );
}

//If the logged in user is moderator enable some extra features
//
if (is_moderator($logged_in_user, $forum)) {
    if ($thread->hidden){
        show_button(
            "forum_moderate_thread_action.php?action=unhide&amp;thread=".$thread->id."$tokens",
            tra("Unhide"),
            tra("Unhide this thread")
        );
    } else {
        show_button(
            "forum_moderate_thread.php?action=hide&amp;thread=".$thread->id,
            tra("Hide"),
            tra("Hide this thread")
        );
    }
    if ($thread->sticky){
        show_button(
            "forum_moderate_thread_action.php?action=desticky&amp;thread=".$thread->id."$tokens",
            tra("Make unsticky"),
            tra("Make this thread not sticky")
        );
    } else {
        show_button(
            "forum_moderate_thread_action.php?action=sticky&amp;thread=".$thread->id."$tokens",
            tra("Make sticky"),
            tra("Make this thread always appear at top of forum")
        );
    }
    if ($thread->locked) {
        show_button(
            "forum_moderate_thread_action.php?action=unlock&amp;thread=".$thread->id."$tokens",
            tra("Unlock"),
            tra("Allow new posts in this thread")
        );
    } else {
        show_button(
            "forum_moderate_thread.php?action=lock&amp;thread=".$thread->id."$tokens",
            tra("Lock"),
            tra("Don't allow new posts in this thread")
        );
    }
    if ($forum->parent_type == 0) {
        show_button(
            "forum_moderate_thread.php?action=move&amp;thread=".$thread->id."$tokens",
            tra("Move"),
            tra("Move this thread to a different forum")
        );
    }
    show_button(
        "forum_moderate_thread.php?action=title&amp;thread=".$thread->id."$tokens",
        tra("Edit title"),
        tra("Edit thread title")
    );
}

if (is_admin($logged_in_user)) {
    show_button(
        "forum_moderate_thread.php?action=delete&amp;thread=".$thread->id."$tokens",
        tra("Delete"),
        tra("Delete thread permanently")
    );
}

// let admins decide whether a news item should be exported as notice
//
if (is_news_forum($forum) && $logged_in_user && ($logged_in_user->id == $thread->owner)) {
    if ($thread->status) {
        show_button(
            "forum_thread_status.php?action=clear&amp;id=$thread->id",
            tra("Export as Notice"),
            "Show this message to all volunteers in the desktop GUI.  Use this only for messages of interest or importance to all volunteers."
        );
    } else {
        show_button(
            "forum_thread_status.php?action=set&amp;id=$thread->id",
            tra("Don't export"),
            tra("Don't export this news item as a Notice")
        );
    }
}

// Display a box that allows the user to select sorting of the posts
echo "</td><td align=\"right\">
    <input type=\"hidden\" name=\"id\" value=\"", $thread->id, "\">" .
    tra("Sort");
echo select_from_array("sort", $thread_sort_styles, $sort_style);
echo "<input type=\"submit\" value=\"".tra('Sort')."\">
    </td></tr></table></form>
";

show_posts(
    $thread, $forum, $start, $postid, $sort_style, $filter, $logged_in_user
);

if ($reply_url) {
    echo "<br>";
    show_button(
        $reply_url,
        tra("Post to thread"),
        tra("Add a new message to this thread")
    );
}

echo "<p>";
switch ($forum->parent_type) {
case 0:
    show_forum_title($category, $forum, $thread);
    break;
case 1:
    show_team_forum_title($forum, $thread);
    break;
}

$thread->update("views=views+1");

page_tail();
$cvs_version_tracker[]="\$Id$";
?>
