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<?php
/**
* @package Content - Related News
* @version 1.7.0
* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
* @copyright (c) 2012 YouTech Company. All Rights Reserved.
* @author YouTech Company http://www.smartaddons.com
*
*/
defined('_JEXEC') or die;
if (!class_exists('_AbstractReader')){
abstract class _AbstractReader {
protected $_items;
protected $_item_fields = array();
abstract function getItemsFromDb($ids, $overload=true);
abstract function getItemsIn($cids, $params);
protected function addItemFieldToSelect($field){
if (isset($this->_item_fields['*'])){
return false;
} else if (is_string($field)){
$field = trim($field);
if ( $field=='*' ){
$this->_item_fields = array('*'=>'');
} else {
$this->_item_fields[$field] = '';
}
} else if (is_array($field) && count($field)){
foreach ($field as $key => $value) {
$this->_item_fields[$key] = $value;
break;
}
}
}
protected function getItemFields($alias='e'){
if ( !empty($this->_item_fields) ){
$field_array = array();
foreach ($this->_item_fields as $field => $field_alias){
$field = trim($field);
$field_alias = trim($field_alias);
$select_field = '';
if (strpos($field, '.')!==false || ((strpos($field, '(')!==false) && (strpos($field, ')')!==false))){
$select_field .= $field;
} else {
$select_field .= "$alias.$field";
}
if ( !empty($field_alias) ){
$select_field .= " AS $field_alias";
}
array_push($field_array, $select_field);
}
return implode(',', $field_array);
}
return "$alias.*";
}
public function getItem($id){
$item = null;
if ( isset($this->_items[$id]) || $this->getItemsFromDb($id, false) ){
$item = &$this->_items[$id];
}
return $item;
}
public function getItems($ids){
$items = array();
if ( is_string($ids) ){
$ids = explode(',', $ids);
}
if ( is_array($ids) ){
array_map('intval', $ids);
$ids = array_unique($ids);
$missing = array();
foreach ($ids as $id) {
if (!isset($this->_items[$id])){
$missing[$id] = $id;
}
}
empty($missing) OR $this->getItemsFromDb($missing, false);
foreach ($ids as $id){
if (isset($this->_items[$id])){
$items[$id] = &$this->_items[$id];
}
}
}
return $items;
}
protected $_categories = null;
protected $_category_fields = array();
protected function addCategoryFieldToSelect($field){
if (isset($this->_category_fields['*'])){
return false;
} else if (is_string($field)){
$field = trim($field);
if ( $field=='*' ){
$this->_category_fields = array('*'=>'');
} else {
$this->_category_fields[$field] = '';
}
} else if (is_array($field) && count($field)){
foreach ($field as $key => $value) {
$this->_category_fields[$key] = $value;
break;
}
}
}
protected function getCategoryFields($alias='e'){
if ( !empty($this->_category_fields) ){
$field_array = array();
foreach ($this->_category_fields as $field => $field_alias){
$field = trim($field);
$field_alias = trim($field_alias);
$select_field = '';
if (strpos($field, '.')!==false || ((strpos($field, '(')!==false) && (strpos($field, ')')!==false))){
$select_field .= $field;
} else {
$select_field .= "$alias.$field";
}
if ( !empty($field_alias) ){
$select_field .= " AS $field_alias";
}
array_push($field_array, $select_field);
}
return implode(',', $field_array);
}
return "$alias.*";
}
abstract function getCategoriesFromDb();
abstract function buildCategoriesTree();
public function getCategory($cid){
$categories = &$this->getCategoriesFromDb();
$category = null;
if ( isset($categories[$cid]) ){
$category = &$categories[$cid];
}
return $category;
}
public function getPublishedCategories($params){
$category_ids = null;
if (isset($params['source']) && !empty($params['source'])){
$category_ids = $params['source'];
if (is_string($category_ids)){
$category_ids = explode(',', $category_ids);
}
if (!is_array($category_ids)){
$category_ids = array($category_ids);
}
// load published categories
$this->getCategoriesFromDb($category_ids);
foreach ($category_ids as $i => $cid) {
if (!isset($this->_categories[$cid])){
unset($category_ids[$i]);
}
}
}
return $category_ids;
}
public function getChildCategoryIds($cid, $self_include=false, $deep=0){
$return = array();
$categories = &$this->getCategoriesFromDb();
if (is_array($cid)) {
$cid = array_shift($cid);
} else if (is_string($cid)) {
$cid = (int)$cid;
}
if( isset($categories[$cid]) ){
if ($deep){
$tmplevel = array();
}
// prepare
$stack = array($categories[$cid]);
$tmplevel[$cid] = $self_include ? 1 : 0;
// start
while( count($stack)>0 ){
$top = array_pop($stack);
if ($self_include || $cid!=$top->id){
in_array($top->id, $return) || array_push($return, $top->id);
}
if (($deep==0 || $tmplevel[$top->id]<$deep) && count($top->child_category)){
foreach (array_reverse($top->child_category) as $id => $child) {
array_push($stack, $child);
$tmplevel[$child->id] = $tmplevel[$top->id] + 1;
}
}
}
}
return $return;
}
public function getCategoryItems($cid, $params, $only_ids=false){
if (isset($params['subcategories']) && (int)$params['subcategories']){
// include sub categories's items
$inc_category_ids =array();
if (is_string($cid)){
$cid = explode(",",$cid);
}
if (!is_array($cid)){
$cid = array($cid);
}
foreach($cid as $id){
$temp = $this->getChildCategoryIds($id, true);
foreach($temp as $tempid){
$inc_category_ids[] = $tempid;
}
}
$inc_category_ids = array_unique($inc_category_ids);
} else {
if (is_string($cid)){
$cid = explode(",",$cid);
}
if (!is_array($cid)){
$cid = array($cid);
}
$inc_category_ids = $cid;
}
if ($only_ids){
return $this->getItemsIn($inc_category_ids, $params);
} else {
$item_ids = $this->getItemsIn($inc_category_ids, $params);
return $this->getItems($item_ids, $params);
}
}
}
}