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<?php
/**
* Returns a list of tags linked to the given one(s),
* suitable for jsTree consumption.
*
* Accepted GET parameters:
*
* @param string $tag Tag for which the children tags shall be returned
* Multiple tags (separated with comma) are supported.
* If no tag is given, all top-level tags are loaded.
* @param integer $uId User ID to fetch the tags for
* @param boolean $parent Load parent tags
*
* SemanticScuttle - your social bookmark manager.
*
* PHP version 5.
*
* @category Bookmarking
* @package SemanticScuttle
* @subpackage Templates
* @author Benjamin Huynh-Kim-Bang <mensonge@users.sourceforge.net>
* @author Christian Weiske <cweiske@cweiske.de>
* @author Eric Dane <ericdane@users.sourceforge.net>
* @license GPL http://www.gnu.org/licenses/gpl.html
* @link http://sourceforge.net/projects/semanticscuttle
*/
$httpContentType = 'application/json';
require_once '../www-header.php';
$tag = isset($_GET['tag']) ? $_GET['tag'] : null;
$uId = isset($_GET['uId']) ? (int)$_GET['uId'] : 0;
$loadParentTags = isset($_GET['parent']) ? (bool)$_GET['parent'] : false;
$tags = explode(',', trim($tag));
if (count($tags) == 1 && $tags[0] == '') {
//no tags
$tags = array();
}
function assembleLinkedTagData(
$tags, $uId, $loadParentTags, SemanticScuttle_Service_Tag2Tag $t2t
) {
$tagData = array();
if (count($tags) == 0) {
//no tags given -> show the 4 most used top-level tags
$orphewTags = $t2t->getOrphewTags('>', $uId, 4, 'nb');
#$orphewTags = $t2t->getOrphewTags('>', $uId);
foreach ($orphewTags as $orphewTag) {
$tags[] = $orphewTag['tag'];
}
$loadParentTags = true;
}
if ($loadParentTags) {
//find parent tags + append the selected tags as children afterwards
foreach ($tags as $tag) {
$parentTags = $t2t->getLinkedTags($tag, '>', $uId, true);
if (count($parentTags) > 0) {
foreach ($parentTags as $parentTag) {
$ta = createTagArray(
$parentTag, true, true, true
);
//FIXME: find out if there are subtags
$tac = createTagArray($tag, true);
$ta['children'][] = $tac;
$tagData[] = $ta;
}
} else {
//no parent tags -> display it normally
//FIXME: find out if there are subtags
$tagData[] = createTagArray($tag, true);
}
}
} else {
//just find the linked tags
foreach ($tags as $tag) {
$linkedTags = $t2t->getLinkedTags($tag, '>', $uId);
foreach ($linkedTags as $linkedTag) {
//FIXME: find out if there are subtags
$tagData[] = createTagArray($linkedTag, true);
}
}
}
return $tagData;
}
/**
* Creates an jsTree json array for the given tag
*
* @param string $tag Tag name
* @param boolean $hasChildren If the tag has subtags (children) or not.
* If unsure, set it to "true".
* @param boolean $isOpen If the tag has children: Is the tree node open
* or closed?
* @param boolean $autoParent If the tag is an automatically generated parent tag
*
* @return array Array to be sent back to the browser as json
*/
function createTagArray($tag, $hasChildren = true, $isOpen = false, $autoParent = false)
{
if ($autoParent) {
$title = '(' . $tag . ')';
} else {
$title = $tag;
}
$ar = array(
'data' => array(
//<a> attributes
'title' => $title,
'attr' => array(
'href' => createUrl('tags', $tag)
)
),
//<li> attributes
'attr' => array(
'rel' => $tag,//needed for identifying the tag in html
),
);
if ($hasChildren) {
//jstree needs that to show the arrows
$ar['state'] = $isOpen ? 'open' : 'closed';
}
if ($autoParent) {
//FIXME: use css class
$ar['data']['attr']['style'] = 'color: #AAA';
}
return $ar;
}
$tagData = assembleLinkedTagData(
$tags, 0/*$uId*/, $loadParentTags,
SemanticScuttle_Service_Factory::get('Tag2Tag')
);
echo json_encode($tagData);
?>
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