<?php

require_once('smart_album.inc.php');
require_once('albumutil.php');

class SmartAlbumAPI extends WebAPI {

    function __construct() {
        parent::__construct(SZ_WEBAPI_API_DESCRIPTION_PATH);
    }

    protected function Process() {
        if (!strcasecmp($this->method, "list")) {
			session_write_close();
            $this->SmartAlbumList();
        } elseif (!strcasecmp($this->method, "getinfo")) {
			session_write_close();
            $this->GetInfo();
        } else {
            csSYNOPhotoMisc::CheckSessionTimeOut();

            if (!strcasecmp($this->method, "create")) {
                $this->Create();
            } elseif (!strcasecmp($this->method, "edit")) {
                $this->Edit();
            } elseif (!strcasecmp($this->method, "delete")) {
                $this->Delete();
            }
        }
	}

	private function ExtractAlbumToArray($data)
	{
		$params = array();
		$idArr = array();
		$items = explode(',', $data);
		foreach ($items as $item) {
			$arr = explode('_', $item);
			if (2 !== count($arr)) {
				return $idArr;
			}
			if ('album' !== $arr[0]) {
				return $idArr;
			}
			$sharename = trim($arr[1]);
			if ('' != $sharename) {
				$sharename = @pack('H*', $arr[1]);
				array_push($params, $sharename);
			}
		}
		$albums = Album::GetBySharename($params);
		foreach ($albums as $album) {
			$id = $album['shareid'];
			array_push($idArr, $id);
		}
		return $idArr;
	}

    private function ExtractTagStringToArray($tagString)
    {
        $tagArr = array();
        $arr = explode(',', $tagString);
        foreach ($arr as $tag) {
            $split = explode('tag_', $tag);
            if (2 !== count($split)) {
                return $tagArr;
            }
            array_push($tagArr, $split[1]);
        }
        return $tagArr;
	}

	private function ExtractExifStringToArray($exifString, $prefix = 'tag_')
	{
		$exifArr = array();
		$arr = explode(',', $exifString);
		foreach ($arr as $exif) {
			$split = explode($prefix, $exif);
			if (2 !== count($split)) {
				return false;
			}
			array_push($exifArr, $split[1]);
		}
		return $exifArr;
	}

    private function GetParams_List() {
        $params = array();
        if (!isset($_REQUEST['offset']) || !isset($_REQUEST['limit'])) {
            return false;
        }
        $params['offset'] = $_REQUEST['offset'];
        $params['limit'] = $_REQUEST['limit'];

        $params['sort_by'] = (isset($_REQUEST['sort_by'])) ? $_REQUEST['sort_by'] : 'title';
        if (!in_array($params['sort_by'], array('title'))) {
            return false;
        }
        $params['sort_direction'] = (isset($_REQUEST['sort_direction'])) ? $_REQUEST['sort_direction'] : 'asc';
        if (!in_array($params['sort_direction'], array('asc', 'desc'))) {
            return false;
        }

        // additional operator
        $params['additional'] = array();
        $params['additional'] = explode(',', $_REQUEST['additional']);

        return $params;
    }

    /**
     * 
     *  @return
     *   params object - success
     *   -1 - bad parameter
     *   -2 - smart album not exist
     */
    private function GetParams_Info() {
        $params = array();
        if (!isset($_REQUEST['id'])) {
            return -1;
        }
        $arr = explode(',', $_REQUEST['id']);
        $params['id'] = array();
        foreach ($arr as $smartID) {
            if (!$this->CheckSmartAlbumExist($smartID)) {
                return -2;
            }
            $split = explode('smart_', $smartID);
            array_push($params['id'], $split[1]);
        }
        // additional operator
        $params['additional'] = array();
        $params['additional'] = explode(',', $_REQUEST['additional']);

        return $params;
    }

    /**
     * 
     * @return 
     *   -1 - bad parameter
     *   -2 - smart album not exist
     */
    private function GetPrams_Edit() {
        $params = array();

        if (!isset($_REQUEST['id'])) {
            return -1;
        }
        // check smart album exist
        if (!$this->CheckSmartAlbumExist($_REQUEST['id'])) {
            return -2;
        }
        $arr = explode('smart_', $_REQUEST['id']);
        if (2 !== count($arr)) {
            return -1;
        }
        $params['id'] = $arr[1];
        $smartName =  @pack('H*', $arr[1]);
        $params['name'] = (isset($_REQUEST['name']) && '' !== $_REQUEST['name']) ? $_REQUEST['name'] : $smartName;
        $params['orig_name'] = $smartName;

        // get original smart album setting
        $smartAlbumCond = SmartAlbum::GetSmartAlbumInstance()->GetSmartCondition($smartName);
        // type
        if (isset($_REQUEST['type'])) {
            $params['type'] = $_REQUEST['type'];
            $arr = explode(',', $params['type']);
            $count = 0;
            foreach ($arr as $type) {
                if (!in_array($type, array('photo', 'video'))) {
                    return -1;
                }
                $count++;
            }
            if (1 > $count) {
                return -1;
            }
        } else {
            $params['type'] = $smartAlbumCond['type'];
		}
		// albums
		if (isset($_REQUEST['albums'])) {
			if (empty($_REQUEST['albums'])) {
				$params['albums'] = null;
			} else {
				$params['albums'] = $this->ExtractAlbumToArray($_REQUEST['albums']);
			}
		} else {
			$arr = $this->ExtractAlbumToArray($smartAlbumCond['albums']);
			$params['albums'] = empty($arr) ? null : $arr;
		}
		// keyword
		if (isset($_REQUEST['keyword'])) {
            if ('' === $_REQUEST['keyword']) {
                $params['keyword'] = null;
                $params['keyword_op'] = null;
            } else {
                $params['keyword'] = $_REQUEST['keyword'];
                $default = isset($smartAlbumCond['keyword_op']) ? $smartAlbumCond['keyword_op'] : 'any';
                $params['keyword_op'] = (isset($_REQUEST['keyword_op'])) ? $_REQUEST['keyword_op'] : $default;
                if (isset($params['keyword_op']) && !in_array($params['keyword_op'], array('any', 'all', 'exact'))) {
                    return -1;
                }
            }
        } else {
            $params['keyword'] = $smartAlbumCond['keyword'];
            $params['keyword_op'] = $smartAlbumCond['keyword_op'];
        }
        // date
        if (isset($_REQUEST['date'])) {
            if (empty($_REQUEST['date'])) {
                $params['date'] = null;
                $params['date_op'] = null;
            } else {
                $default = isset($smartAlbumCond['date_op']) ? $smartAlbumCond['date_op'] : 'taken';
                $params['date_op'] = (isset($_REQUEST['date_op'])) ? $_REQUEST['date_op'] : $default;
				if (in_array($params['date_op'], array('recently_add', 'recently_comment'))) {
					$params['date'] = $_REQUEST['date'];

				} else if (in_array($params['date_op'], array('taken', 'upload'))) {
					$dates = explode(',', $_REQUEST['date']);
					try {
						if ($dates[0]) {
							$date1 = new DateTime($dates[0]);
						}
						if ($dates[1]) {
							$date2 = new DateTime($dates[1]);
						}
					} catch (Exception $e) {
						return -1;
					}
					if (($date1 && $date2 && $date2 < $date1) || (!$date1 && !$date2)) {
						return -1;
					}
					$params['date'] = ($date1 ? $date1->format('Y-m-d') : "").",".($date2 ? $date2->format("Y-m-d") : "");
				} else {
					return -1;
				}
            }
        } else {
            $params['date'] = $smartAlbumCond['date'];
            $params['date_op'] = $smartAlbumCond['date_op'];
        }
        // peopel_tag
        if (isset($_REQUEST['people_tag'])) {
            if (empty($_REQUEST['people_tag'])) {
                $params['people_tag'] = null;
                $params['people_tag_op'] = null;
            } else {
                // get people_tag
                $params['people_tag'] = $this->ExtractTagStringToArray($_REQUEST['people_tag']);
                // get people_tag_op
                $default = isset($smartAlbumCond['people_tag_op']) ? $smartAlbumCond['people_tag_op'] : 'all';
                $params['people_tag_op'] = (isset($_REQUEST['people_tag_op'])) ? $_REQUEST['people_tag_op'] : $default;
                if (isset($params['people_tag_op']) && !in_array($params['people_tag_op'], array('all', 'any'))) {
                    return -1;
                }
            }
        } else {
            $arr = $this->ExtractTagStringToArray($smartAlbumCond['people_tag']);
            $params['people_tag'] = empty($arr) ? null : $arr;
            $params['people_tag_op'] = $smartAlbumCond['people_tag_op'];
        }
        // geo_tag
        if (isset($_REQUEST['geo_tag'])) {
            if (empty($_REQUEST['geo_tag'])) {
                $params['geo_tag'] = null;
                $params['geo_tag_op'] = null;
            } else {
                // get geo_tag
                $params['geo_tag'] = $this->ExtractTagStringToArray($_REQUEST['geo_tag']);
                // get geo_tag_op
                $default = isset($smartAlbumCond['geo_tag_op']) ? $smartAlbumCond['geo_tag_op'] : 'all';
                $params['geo_tag_op'] = (isset($_REQUEST['geo_tag_op'])) ? $_REQUEST['geo_tag_op'] : $default;
                if (isset($params['geo_tag_op']) && !in_array($params['geo_tag_op'], array('all', 'any'))) {
                    return -1;
                }
            }
        } else {
            $arr = $this->ExtractTagStringToArray($smartAlbumCond['geo_tag']);
            $params['geo_tag'] = empty($arr) ? null : $arr;
            $params['geo_tag_op'] = $smartAlbumCond['geo_tag_op'];
        }
        // desc_tag
        if (isset($_REQUEST['desc_tag'])) {
            if (empty($_REQUEST['desc_tag'])) {
                $params['desc_tag'] = null;
                $params['desc_tag_op'] = null;
            } else {
                // get desc_tag
                $params['desc_tag'] = $this->ExtractTagStringToArray($_REQUEST['desc_tag']);
                // get desc_tag_op
                $default = isset($smartAlbumCond['desc_tag_op']) ? $smartAlbumCond['desc_tag_op'] : 'all';
                $params['desc_tag_op'] = (isset($_REQUEST['desc_tag_op'])) ? $_REQUEST['desc_tag_op'] : $default;
                if (isset($params['desc_tag_op']) && !in_array($params['desc_tag_op'], array('all', 'any'))) {
                    return -1;
                }
            }
        } else {
            $arr = $this->ExtractTagStringToArray($smartAlbumCond['desc_tag']);
            $params['desc_tag'] = empty($arr) ? null : $arr;
            $params['desc_tag_op'] = $smartAlbumCond['desc_tag_op'];
		}

		foreach(SmartAlbum::$exif2IdPrefix as $label => $prefix) {
			$exifParam = $this->GetExifParams_Edit($label, $prefix.'_');
			if (-1 === $exifParam['success']) {
				return -1;
			} else {
				$params[$label] = $exifParam['label'];
				$params[$label.'_op'] = $exifParam['op'];
			}
		}

		if ((null === $params['keyword'] || '' === $params['keyword']) && empty($params['date']) && empty($params['people_tag']) && empty($params['geo_tag'])
			&& empty($params['desc_tag']) && empty($params['albums']) && empty($params['camera']) && empty($params['model']) && empty($params['exposure']) && empty($params['aperture'])
			&& empty($params['iso']) && empty($params['focal']) && empty($params['lens']) && empty($params['flash'])) {
            return -1;
        }
        return $params;
	}

	private function GetExifParams_Edit($label, $prefix) {
		$ret['success'] = true;
		$op = $label."_op";
		if (isset($_REQUEST[$label])) {
			if (empty($_REQUEST[$label])) {
				$ret['label'] = null;
				$ret['op'] = null;
			} else {
				$ret['label'] = array();
				$ret['label'] = $this->ExtractExifStringToArray($_REQUEST[$label], $prefix);
				$defalt = isset($smartAlbumCond[$op]) ? $smartAlbumCond[$op] : 'any';
				$ret['op'] = (isset($_REQUEST[$op])) ? $_REQUEST[$op] : $default;
				if (isset($ret['op']) && 'any' !== $ret['op']) {
					$ret['success'] = false;
				}
			}
		} else {
			$arr = $this->ExtractExifStringToArray($smartAlbumCond[$lable]);
			$ret['label'] = empty($arr) ? null : $arr;
			$ret['op'] = $smartAlbumCond[$op];
		}
		return $ret;
	}

    private function GetParams_Create() {
        $params = array();

        if (!isset($_REQUEST['name']) || !isset($_REQUEST['type'])) {
            return false;
        }
        $params['name'] = $_REQUEST['name'];
        // type
        $params['type'] = $_REQUEST['type'];
        $arr = explode(',', $params['type']);
        $count = 0;
        foreach ($arr as $type) {
            if (!in_array($type, array('photo', 'video'))) {
                return false;
            }
            $count++;
        }
        if (1 > $count) {
            return false;
		}

		$albums = (isset($_REQUEST['albums'])) ? $_REQUEST['albums'] : null;
		if (!empty($_REQUEST['albums'])) {
			$params['albums'] = $this->ExtractAlbumToArray($albums);
		}

        $params['keyword'] = (isset($_REQUEST['keyword'])) ? $_REQUEST['keyword'] : null;
        if (!empty($_REQUEST['keyword']) || '0' === $_REQUEST['keyword']) {
            $default = 'all';
            $params['keyword_op'] = (isset($_REQUEST['keyword_op'])) ? $_REQUEST['keyword_op'] : $default;
            if (isset($params['keyword_op']) && !in_array($params['keyword_op'], array('any', 'all', 'exact'))) {
                return false;
            }
        }
        $params['date'] = (isset($_REQUEST['date'])) ? $_REQUEST['date'] : null;
        if (!empty($_REQUEST['date'])) {
            $default = 'taken';
            $params['date_op'] = (isset($_REQUEST['date_op'])) ? $_REQUEST['date_op'] : $default;
            if (isset($params['date_op']) && !in_array($params['date_op'], array('taken', 'upload', 'recently_add', 'recently_comment'))) {
                return false;
            }
        }
        $people_tags = (isset($_REQUEST['people_tag'])) ? $_REQUEST['people_tag'] : null;
        if (!empty($_REQUEST['people_tag'])) {
            // get people_tag
            $params['people_tag'] = array();
            $params['people_tag'] = $this->ExtractTagStringToArray($people_tags);
            // get people_tag_op
            $default = 'all';
            $params['people_tag_op'] = (isset($_REQUEST['people_tag_op'])) ? $_REQUEST['people_tag_op'] : $default;
            if (isset($params['people_tag_op']) && !in_array($params['people_tag_op'], array('all', 'any'))) {
                return false;
            }
        }
        $geo_tags = (isset($_REQUEST['geo_tag'])) ? $_REQUEST['geo_tag'] : null;
        if (!empty($_REQUEST['geo_tag'])) {
            // get geo_tag
            $params['geo_tag'] = array();
            $params['geo_tag'] = $this->ExtractTagStringToArray($geo_tags);
            // get geo_tag_op
            $default = 'all';
            $params['geo_tag_op'] = (isset($_REQUEST['geo_tag_op'])) ? $_REQUEST['geo_tag_op'] : $default;
            if (isset($params['geo_tag_op']) && !in_array($params['geo_tag_op'], array('all', 'any'))) {
                return false;
            }
        }
        $desc_tags = (isset($_REQUEST['desc_tag'])) ? $_REQUEST['desc_tag'] : null;
        if (!empty($_REQUEST['desc_tag'])) {
            // get desc_tag
            $params['desc_tag'] = array();
            $params['desc_tag'] = $this->ExtractTagStringToArray($desc_tags);
            // get desc_tag_op
            $default = 'all';
            $params['desc_tag_op'] = (isset($_REQUEST['desc_tag_op'])) ? $_REQUEST['desc_tag_op'] : $default;
            if (isset($params['desc_tag_op']) && !in_array($params['desc_tag_op'], array('all', 'any'))) {
                return false;
            }
		}
		foreach(SmartAlbum::$exif2IdPrefix as $label => $prefix) {
			$value = (isset($_REQUEST[$label])) ? $_REQUEST[$label] : null;
			$op = $label.'_op';
			if (!empty($_REQUEST[$label])) {
				$params[$label] = $this->ExtractExifStringToArray($value, $prefix.'_');
				$default = 'any';
				$params[$op] = (isset($_REQUEST[$op])) ? $_REQUEST[$op] : $default;
				if (isset($params[$op]) && 'any' !== $params[$op]) {
					return false;
				}
			}
		}

		if ((null === $params['keyword'] || '' === $params['keyword']) && empty($params['albums']) && empty($params['date']) && empty($params['people_tag'])
			&& empty($params['geo_tag']) && empty($params['desc_tag']) && empty($params['camera']) && empty($params['model'])
			&& empty($params['exposure']) && empty($params['aperture']) && empty($params['iso']) && empty($params['focal'])
			&& empty($params['lens']) && empty($params['flash'])) {
            return false;
        }

		return $params;
	}

    /**
     * 
     * @param 
     *  $tagIDs - array
     *  $type - 0 means people tag
     *          1 means geo tag
     *          2 means desc tag
     */
    private function CheckTagExist($tagIDs, $type) {
        if (!is_array($tagIDs)) {
            return false;
        }
        foreach ($tagIDs as $id) {
            $query = "SELECT count(id) FROM photo_label WHERE id={$id} AND category={$type}";
            $db_result = PHOTO_DB_Query($query);
            $row = PHOTO_DB_FetchRow($db_result);
            if (1 !== (int)$row[0]) {
                return false;
            }
        }

        return true;
	}
	private function CheckExifExist($exifNames, $columnName) {
		if (!is_array($exifNames)) {
			return false;
		}
		foreach($exifNames as $exifName) {
			if ('flash_v2' == $columnName) {
				$exifName = str_replace('#', ',', $exifName);
			}
			$query = "SELECT count(". $columnName .") FROM photo_image WHERE ". $columnName ."=?";
			$db_result = PHOTO_DB_Query($query, array($exifName));
			$row = PHOTO_DB_FetchRow($db_result);
			if (1 > (int)$row[0]) {
				return false;
			}
		}

		return true;
	}

    /**
     * 
     * @param 
     *  $smartID - ex: smart_id 
     */
    private function CheckSmartAlbumExist($smartID) {
        $arr = explode('smart_', $smartID);
        if (2 !== count($arr)) {
            return false;
        }
        $smartName = @pack('H*', $arr[1]);
        $result = SmartAlbum::GetSmartAlbumInstance()->ReadSmartAlbumFile();
        if (!isset($result['smart_albums'][$smartName])) {
            return false;
        }
        return true;
    }

	private function ConvertToSmartExifCondition($data, $label, $op){
		$rule_set['field'] = $label;
		$rule_set['operator'] = $data[$op];
		$strings = implode(',', $data[$label]);
		$rule_set['value'] = $strings;
		return $rule_set;
	}

    private function ConvertToSmartCondition($data) {
        $rule_sets = array();
        $rule_sets[0] = array();

        $ret['orig_name'] = $data['orig_name'];
        $ret['name'] = $data['name'];
        $ret['desc'] = '';
        $ret['show_photo'] = strstr($data['type'], 'photo') ? true : false;
        $ret['show_video'] = strstr($data['type'], 'video') ? true : false;

		if (isset($data['albums'])) {
			$rule_set['field'] = 'albums';
			$rule_set['operator'] = 'any';
			$albumString = implode(',', $data['albums']);
			$rule_set['value'] = $albumString;
			array_push($rule_sets[0], $rule_set);
		}
        if (isset($data['keyword']) && isset($data['keyword_op'])) {
            $rule_set['field'] = 'keyword';
            $rule_set['operator'] = $data['keyword_op'];
            $rule_set['value'] = $data['keyword'];
            array_push($rule_sets[0], $rule_set);
        }
        if (isset($data['date']) && isset($data['date_op'])) {
            $rule_set['field'] = 'date';
            $rule_set['operator'] = $data['date_op'];
            $rule_set['value'] = $data['date'];
            array_push($rule_sets[0], $rule_set);
        }
        if (isset($data['people_tag']) && isset($data['people_tag_op'])) {
            $rule_set['field'] = 'people';
            $rule_set['operator'] = $data['people_tag_op'];
            $peopleString = implode(',', $data['people_tag']);
            $rule_set['value'] = $peopleString;
            array_push($rule_sets[0], $rule_set);
        }
        if (isset($data['geo_tag']) && isset($data['geo_tag_op'])) {
            $rule_set['field'] = 'geo';
            $rule_set['operator'] = $data['geo_tag_op'];
            $geoString = implode(',', $data['geo_tag']);
            $rule_set['value'] = $geoString;
            array_push($rule_sets[0], $rule_set);
        }
        if (isset($data['desc_tag']) && isset($data['desc_tag_op'])) {
            $rule_set['field'] = 'desc';
            $rule_set['operator'] = $data['desc_tag_op'];
            $descString = implode(',', $data['desc_tag']);
            $rule_set['value'] = $descString;
            array_push($rule_sets[0], $rule_set);
		}
		foreach(SmartAlbum::$exif2IdPrefix as $label => $prefix) {
			$op = $label.'_op';
			if (isset($data[$label]) && isset($data[$op])) {
				$rule_set = $this->ConvertToSmartExifCondition($data, $label, $op);
				array_push($rule_sets[0], $rule_set);
			}
		}

		$ret['rule_sets'] = $rule_sets;
        return json_encode($ret);
	}

    private function FormSmartAlbums($smartNames = false, $params = array()) {
        $smartAlbumList = SmartAlbum::GetSmartAlbumInstance()->ReadSmartAlbumFile();
        $smartAlbumArr = array();

        if (empty($smartAlbumList) || !is_array($smartAlbumList['smart_albums'])) {
            return $smartAlbumArr;
        }
		$smartAlbums = $smartAlbumList['smart_albums'];
		if (false != $smartNames) {
			foreach($smartNames as $name) {
				if ($smartAlbums[$name]) {
					$list[$name] = $smartAlbums[$name];
				}
			}
		} else {
			$list = $smartAlbums;
		}

		$needThumbSize = in_array('thumb_size', $params['additional']);
        foreach ($list as $key => $item) {
            $item['name'] = (string)$key;
			$smartAlbum = Decorator::SmartFormula($item, array(
				'param'=> $params,
				'needThumbSize' => $needThumbSize
			));
			if (-1 === $smartAlbum) {
				continue;
			}
            $smartAlbumArr[] = $smartAlbum;
        }
        return $smartAlbumArr;
    }

    private function SortTitle_ASC($a, $b) {
        if (strtoupper($a['name']) == strtoupper($b['name'])) {
            return 0;
        }
        return (strtoupper($a['name']) < strtoupper($b['name'])) ? -1 : 1;
    }

    private function SortTitle_DESC($a, $b) {
        if (strtoupper($a['name']) == strtoupper($b['name'])) {
            return 0;
        }
        return (strtoupper($a['name']) > strtoupper($b['name'])) ? -1 : 1;
    }

    private function SortItem($smartAlbums, $sortBy, $sortDirection, $offset, $limit) {
        if ('title' ===$sortBy) {
            if ('asc' === $sortDirection) {
                usort($smartAlbums, 'self::SortTitle_ASC');
            } else {
                usort($smartAlbums, 'self::SortTitle_DESC');
            }
        }
        $cutItemSort = array();
        if (0 > (int)$limit) {
            // array_slice() will reorder and reset the numeric array indices by default.
            // Preserve_keys are set to TRUE to solve bug#2195.
            $cutItemsSort = array_slice($smartAlbums, $offset, NULL, true);
        } else {
            $cutItemsSort = array_slice($smartAlbums, $offset, $limit, true);
        }
        return $cutItemsSort;
    }

    private function SmartAlbumList() {
        // Get and check params
        $params = array();
        $params = $this->GetParams_List();
        if (!$params) {
            $this->SetError(WEBAPI_ERR_BAD_REQUEST);
            goto End;
        }
		$resp = array(
			'total' => 0,
			'offset' => 0,
			'smart_albums'=> array()
		);
		$smartAlbumList = SmartAlbum::GetSmartAlbumInstance()->ReadSmartAlbumFile();
		if (empty($smartAlbumList) || !is_array($smartAlbumList['smart_albums'])) {
			goto End;
		}
		$smartAlbums = $smartAlbumList['smart_albums'];

		$selectedAlbums = array();
		if ('title' == $params['sort_by']) {
			if ('asc' === $params['sort_direction']) {
				ksort($smartAlbums);
			} else {
				krsort($smartAlbums);
			}

			if (0 > (int)$limit) {
				// array_slice() will reorder and reset the numeric array indices by default.
				// Preserve_keys are set to TRUE to solve bug#2195.
				$selectedAlbums = array_slice($smartAlbums, $params['offset'], NULL, true);
			} else {
				$selectedAlbums = array_slice($smartAlbums, $params['offset'], $params['limit'], true);
			}
		}

		if (count($selectedAlbums)) {
			$albumNames = array_keys($selectedAlbums);
		} else {
			$albumNames = false;
		}

        // Get and form to webapi format
        $smart_albums = array();
        $smart_albums = $this->FormSmartAlbums($albumNames, $params);
        $total = count($smart_albums);

        // sort and set offset, limit
		$smartSort = $smart_albums;
		$smartSort = $this->SortItem($smart_albums, $params['sort_by'], $params['sort_direction'], $params['offset'], $params['limit']);
        $resp['total'] = $total;
        $offset = (0 > $params['limit']) ? $resp['total'] : $params['offset'] + $params['limit'];
        $resp['offset'] = ($offset > $total) ?  $total : $offset;
        $resp['smart_albums'] = $smartSort;
    End:
        $this->SetResponse($resp);
        return;
    }

    private function GetInfo() {
        // Get and check params
        $params = array();
        $params = $this->GetParams_Info();
        if (-1 === $params) {
            $this->SetError(WEBAPI_ERR_BAD_REQUEST);
            goto End;
        } elseif (-2 === $params) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_NOT_EXIST);
            goto End;
        }

        // Get and form to webapi format
        $smartNames = array();
        foreach ($params['id'] as $id) {
            $smartName = @pack('H*', $id);
            array_push($smartNames, $smartName);
        }
        $smart_albums = $this->FormSmartAlbums($smartNames, $params);

        $resp['smart_albums'] = $smart_albums;
        $this->SetResponse($resp);
    End:
        return;
    }

    private function Create() {
        $isAdmin = isset($_SESSION[SYNOPHOTO_ADMIN_USER]['admin_syno_user']);
        if (false === $isAdmin) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_ACCESS_DENY);
            goto End;
        }

        // check parameter
		if (false === ($params = $this->GetParams_Create())) {
            $this->SetError(WEBAPI_ERR_BAD_REQUEST);
            goto End;
        }

        // check tag_id exist
        if (is_array($params['people_tag']) && !$this->CheckTagExist($params['people_tag'], 0)) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_TAG_NOT_EXIST);
            goto End;
        }
        if (is_array($params['geo_tag']) && !$this->CheckTagExist($params['geo_tag'], 1)) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_TAG_NOT_EXIST);
            goto End;
        }
        if (is_array($params['desc_tag']) && !$this->CheckTagExist($params['desc_tag'], 2)) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_TAG_NOT_EXIST);
            goto End;
		}
		foreach(SmartAlbum::$exif2Column as $label => $column) {
			if (is_array($params[$label]) && !$this->CheckExifExist($params[$label], $column)) {
				$this->SetError(PHOTOSTATION_SMARTALBUM_TAG_NOT_EXIST);
				goto End;
			}
		}

        // add smart album
        $jsonRuleData = $this->ConvertToSmartCondition($params);
        $jsonRet = SmartAlbum::GetSmartAlbumInstance()->AddSmartAlbum($jsonRuleData);
        $ret = json_decode($jsonRet, true);
        if (false === $ret['success']) {
	    if ($ret["error"]["code"] == 103) {
		$this->SetError(PHOTOSTATION_SMARTALBUM_CREATE_FAIL_EXIST);
	    } else {
                $this->SetError(PHOTOSTATION_SMARTALBUM_CREATE_FAIL);
	    }
            goto End;
        }

        $resp['id'] = 'smart_'.bin2hex($params['name']);
        $this->SetResponse($resp);
    End:
        return;
    }

    private function Edit() {
        $isAdmin = isset($_SESSION[SYNOPHOTO_ADMIN_USER]['admin_syno_user']);
        if (false === $isAdmin) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_ACCESS_DENY);
            goto End;
        }
        // get parameter
        $params = $this->GetPrams_Edit();
        if (-1 === $params) {
            $this->SetError(WEBAPI_ERR_BAD_REQUEST);
            goto End;
        } elseif (-2 === $params) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_NOT_EXIST);
            goto End;
        }

        // check tag_id exist
        if (is_array($params['people_tag']) && !$this->CheckTagExist($params['people_tag'], 0)) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_TAG_NOT_EXIST);
            goto End;
        }
        if (is_array($params['geo_tag']) && !$this->CheckTagExist($params['geo_tag'], 1)) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_TAG_NOT_EXIST);
            goto End;
        }
        if (is_array($params['desc_tag']) && !$this->CheckTagExist($params['desc_tag'], 2)) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_TAG_NOT_EXIST);
            goto End;
        }
		foreach(SmartAlbum::$exif2Column as $label => $column) {
			if (is_array($params[$label]) && !$this->CheckExifExist($params[$label], $column)) {
				$this->SetError(PHOTOSTATION_SMARTALBUM_TAG_NOT_EXIST);
				goto End;
			}
		}

        // edit smart album
        $jsonRuleData = $this->ConvertToSmartCondition($params);
        $jsonRet = SmartAlbum::GetSmartAlbumInstance()->EditSmartAlbum($jsonRuleData);
        $ret = json_decode($jsonRet, true);
        if (empty($ret) || false === $ret['success']) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_EDIT_FAIL);
            goto End;
        }

        // category hook
        if ($params['name'] !== $params['orig_name']) {
            $newID = bin2hex($params['name']);
            $query = "UPDATE category_items SET smart_id='{$newID}' WHERE smart_id='{$params['id']}'";
            if (false === PHOTO_DB_Query($query)) {
                $this->SetError(PHOTOSTATION_SMARTALBUM_EDIT_FAIL);
                goto End;
            }
        }

        $resp['id'] = 'smart_'.bin2hex($params['name']);
        $this->SetResponse($resp);
    End:
        return;
    }
    
    private function Delete() {
        $isAdmin = isset($_SESSION[SYNOPHOTO_ADMIN_USER]['admin_syno_user']);
        if (false === $isAdmin) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_ACCESS_DENY);
            goto End;
        }
        // Get and check params
        $params = $this->GetParams_Info();
        if (-1 === $params) {
            $this->SetError(WEBAPI_ERR_BAD_REQUEST);
            goto End;
        } elseif (-2 === $params) {
            $this->SetError(PHOTOSTATION_SMARTALBUM_NOT_EXIST);
            goto End;
        }

        // get smart album names
        $smartNames = array();
        foreach ($params['id'] as $id) {
            $smartName = @pack('H*', $id);
            array_push($smartNames, $smartName);
        }

        // delete
        foreach ($smartNames as $smartName) {
            $data['name'] = $smartName;
            $jsonData = json_encode($data);
            SmartAlbum::GetSmartAlbumInstance()->DeleteSmartAlbum($jsonData);

            // category hook
            $id = bin2hex($smartName);
            $query = "DELETE FROM category_items WHERE smart_id='{$id}'";
            PHOTO_DB_Query($query);
        }


    End:
        return;
    }
}

$api = new SmartAlbumAPI();
$api->Run();

?>