function removeTag($tagId, $user, $removeFromAllResources = false)
{
require_once ROOT_DIR . '/services/MyResearch/lib/Tags.php';
require_once ROOT_DIR . '/services/MyResearch/lib/Resource_tags.php';
$rTag = new Resource_tags();
if (!$removeFromAllResources) {
$rTag->resource_id = $this->id;
}
$rTag->tag_id = $tagId;
$rTag->user_id = $user->id;
$rTag->find();
if ($rTag->N > 0) {
while ($rTag->fetch()) {
$rTag->delete();
}
} else {
//the tag was not found.
return false;
}
//Check to see if the tag is still in use by any user for any resource.
$rTag = new Resource_tags();
$rTag->tag_id = $tagId;
$rTag->find();
if ($rTag->N == 0) {
//Tag is still in use, delete it.
$tags = new Tags();
$tags->id = $tagId;
if ($tags->find(true)) {
$tags->delete();
}
}
return true;
}
/**
* Add a resource to the user's account.
*
* @param object $resource The resource to add.
* @param object $list The list to store the resource in.
* @param array $tagArray An array of tags to associate with the
* resource.
* @param string $notes User notes about the resource.
* @param bool $replaceExisting Whether to replace all existing tags (true)
* or append to the existing list (false).
*
* @return bool
* @access public
*/
public function addResource($resource, $list, $tagArray, $notes, $replaceExisting = true)
{
$join = new User_resource();
$join->user_id = $this->id;
$join->resource_id = $resource->id;
$join->list_id = $list->id;
if ($join->find(true)) {
$join->notes = $notes;
$join->update();
// update() will return false if we save without making any changes,
// but we always want to report success after this point.
$result = true;
} else {
if ($notes) {
$join->notes = $notes;
}
$result = $join->insert();
}
if ($result) {
$join = new Resource_tags();
$join->resource_id = $resource->id;
$join->user_id = $this->id;
$join->list_id = $list->id;
if ($replaceExisting) {
// Delete old tags -- note that we need to clone $join for this
// operation or else it will be broken when we use it for searching
// below.
$killer = clone $join;
$killer->delete();
}
// Add new tags, if any:
if (is_array($tagArray) && count($tagArray)) {
foreach ($tagArray as $value) {
$value = str_replace('"', '', $value);
$tag = new Tags();
$tag->tag = $value;
if (!$tag->find(true)) {
$tag->insert();
}
$join->tag_id = $tag->id;
// Don't save duplicate tags!
if (!$join->find(false)) {
$join->insert();
}
}
}
// Update list modification date
$list->updateModifiedDate();
return true;
} else {
return false;
}
}
/**
* Add a tag to the current resource.
*
* @param string $tag The tag to save.
* @param object $user The user posting the tag.
*
* @return bool True on success, false on failure.
* @access public
*/
public function addTag($tag, $user)
{
$tag = trim($tag);
if (!empty($tag)) {
include_once 'services/MyResearch/lib/Tags.php';
include_once 'services/MyResearch/lib/Resource_tags.php';
$tags = new Tags();
$tags->tag = $tag;
if (!$tags->find(true)) {
$tags->insert();
}
$rTag = new Resource_tags();
$rTag->resource_id = $this->id;
$rTag->tag_id = $tags->id;
if (!$rTag->find()) {
$rTag->user_id = $user->id;
$rTag->insert();
}
}
return true;
}
