2 /********************************************************************************
3 * include/tree.inc.php : thread tree
4 * -----------------------
6 * This file is part of the banana distribution
7 * Copyright: See COPYING files that comes with this distribution
8 ********************************************************************************/
11 define('BANANA_TREE_VERSION', '0.1.2');
14 * Class representing a thread tree
20 static private $cache = array();
26 /** Last update timestamp
32 public $data = array();
36 private $urls = array();
37 private $title = array();
39 private $displaid = null
;
41 /** Construct a new tree from a given root
43 public function __construct(BananaSpoolHead
$root)
45 if (empty($root->children
)) {
48 $this->data
=& $this->builder($root);
51 $this->version
= BANANA_TREE_VERSION
;
52 $this->saveToFile($root->id
);
55 private function &builder(BananaSpoolHead
$head)
57 $array = array(array($head->id
));
58 $this->urls
[$head->id
] = banana_entities(Banana
::$page->makeURL(array('group' => Banana
::$group,
59 'artid' => $head->id
)));
60 $this->title
[$head->id
] = banana_entities($head->name
. ', ' . Banana
::$spool->formatDate($head));
61 foreach ($head->children
as $key=>&$msg) {
62 $tree =& $this->builder($msg);
63 $last = $key == count($head->children
) - 1;
64 foreach ($tree as $kt=>&$line) {
65 if ($kt === 0 && $key === 0 && !$last) {
66 $array[0] = array_merge($array[0], array(array('+', $msg->id
)), $line);
67 } else if($kt === 0 && $key === 0) {
68 $array[0] = array_merge($array[0], array(array('-', $msg->id
)), $line);
69 } else if ($kt === 0 && $last) {
70 $array[] = array_merge(array(' ', array('`', $msg->id
)), $line);
71 } else if ($kt === 0) {
72 $array[] = array_merge(array(' ', array('t', $msg->id
)), $line);
74 $array[] = array_merge(array(' ', ' '), $line);
76 $array[] = array_merge(array(' ', array('|', $head->children
[$key+
1]->id
)), $line);
84 /** Save the content of the tree into a file
86 private function saveToFile($id)
88 file_put_contents(BananaTree
::filename($id), serialize($this));
91 /** Create a reference to a tree image.
93 static private function makeTreeImg($img, $alt)
95 return Banana
::$page->makeImg(Array('img' => $img, 'alt' => $alt, 'height' => 18, 'width' => 14));
98 /** Add an entry to the static tree association table.
100 static private function addTreeKind(array& $tree, $ascii, $img)
102 $tree[$ascii] = array(self
::makeTreeImg($img . Banana
::$tree_unread, $ascii),
103 self
::makeTreeImg($img . Banana
::$tree_read, $ascii));
106 /** Return html to display the tree
108 public function &show()
110 if (!is_null($this->displaid
) ||
is_null($this->data
)) {
111 return $this->displaid
;
114 //$u_h, $u_ht, $u_vt, $u_l, $u_f, $r_h, $r_ht, $r_vt, $r_l, $r_f;
116 $t_e = self
::makeTreeImg('e', ' ');
118 self
::addTreeKind($tree, '+', 'p2');
119 self
::addTreeKind($tree, '-', 'm2');
120 self
::addTreeKind($tree, '|', 'l2');
121 self
::addTreeKind($tree, '`', 'a2');
122 self
::addTreeKind($tree, 't', 't2');
124 $text = '<div class="tree">';
125 foreach ($this->data
as &$line) {
126 $text .= '<div style="height: 18px">';
128 foreach ($line as &$item) {
131 } else if (is_array($item)) {
132 $head =& Banana
::$spool->overview
[$item[1]];
133 $text .= $tree[$item[0]][$head->isread ?
1 : 0];
135 $head =& Banana
::$spool->overview
[$item];
136 $text .= '<span style="background-color: ' . $head->color
. '; text-decoration: none" title="'
137 . $this->title
[$item] . '"><input type="radio" name="banana_tree" value="' . $head->id
. '"';
138 if (Banana
::$msgshow_javascript) {
139 $text .= ' onchange="window.location=\'' . $this->urls
[$item] . '\'"';
141 $text .= ' disabled="disabled"';
143 if (Banana
::$artid == $item) {
144 $text .= ' checked="checked"';
146 $last_title = $head->subject
;
147 $text .= '/></span>';
150 if (function_exists('hook_spoolTagBranch') && isset($head)) {
151 $text .= hook_spoolTagBranch($head);
156 $this->displaid
=& $text;
162 static private function filename($id)
166 $host = parse_url(Banana
::$page->makeURL(array()), PHP_URL_HOST
);
168 return BananaSpool
::getPath('tree_' . $id . '_' . $host);
171 /** Read a tree from a file
173 static private function &readFromFile($id)
176 $file = BananaTree
::filename($id);
177 if (!file_exists($file)) {
180 $tree = unserialize(file_get_contents($file));
181 if ($tree->version
!= BANANA_TREE_VERSION
) {
187 /** Build a tree for the given id
189 static public function &build($id)
191 $root =& Banana
::$spool->root($id);
192 if (!isset(BananaTree
::$cache[$root->id
])) {
193 $tree =& BananaTree
::readFromFile($root->id
);
194 if (is_null($tree) ||
$tree->time
< $root->time
) {
195 $tree = new BananaTree($root);
197 BananaTree
::$cache[$root->id
] =& $tree;
199 return BananaTree
::$cache[$root->id
];
202 /** Kill the file associated to the given id
204 static public function kill($id)
206 @unlink
(BananaTree
::filename($id));
209 // vim:set et sw=4 sts=4 ts=4 fenc=utf-8: