/wp-content/plugins/events-manager/classes/em-events.php

<?php

//TODO EM_Events is currently static, better we make this non-static so we can loop sets of events, and standardize with other objects.

/**

 * Use this class to query and manipulate sets of events. If dealing with more than one event, you probably want to use this class in some way.

 *

 */

class EM_Events extends EM_Object implements Iterator {

	/**

	 * Array of EM_Event objects

	 * @var array EM_Event

	 */

	var $events = array();

	

	function EM_Events( $args = array() ){

		if( is_array($args) ){

			if( is_object(current($args)) && get_class(current($args)) == 'EM_Event' ){

				$this->events = $args;

			}else{

				$this->events = EM_Events::get($args);

			}

		}else{

			$this->events = EM_Events::get();

		}

		do_action('em_events',$this);

	}

	

	/**

	 * Returns an array of EM_Events that match the given specs in the argument, or returns a list of future evetnts in future 

	 * (see EM_Events::get_default_search() ) for explanation of possible search array values. You can also supply a numeric array

	 * containing the ids of the events you'd like to obtain 

	 * 

	 * @param array $args

	 * @return EM_Event array()

	 */

	function get( $args = array(), $count=false ) {

		global $wpdb;	 

		$events_table = EM_EVENTS_TABLE;

		$locations_table = EM_LOCATIONS_TABLE;

		

		//Quick version, we can accept an array of IDs, which is easy to retrieve

		if( self::array_is_numeric($args) ){ //Array of numbers, assume they are event IDs to retreive

			//We can just get all the events here and return them

			$sql = "

				SELECT * FROM $events_table

				LEFT JOIN $locations_table ON {$locations_table}.location_id={$events_table}.location_id

				WHERE event_id=".implode(" OR event_id=", $args)."

			";

			$results = $wpdb->get_results(apply_filters('em_events_get_sql',$sql),ARRAY_A);

			$events = array();

			foreach($results as $result){

				$events[$result['event_id']] = new EM_Event($result);

			}

			return $events; //We return all the events matched as an EM_Event array. 

		}

		

		//We assume it's either an empty array or array of search arguments to merge with defaults			

		$args = self::get_default_search($args);

		$limit = ( $args['limit'] && is_numeric($args['limit'])) ? "LIMIT {$args['limit']}" : '';

		$offset = ( $limit != "" && is_numeric($args['offset']) ) ? "OFFSET {$args['offset']}" : '';

		

		//Get the default conditions

		$conditions = self::build_sql_conditions($args);

		//Put it all together

		$where = ( count($conditions) > 0 ) ? " WHERE " . implode ( " AND ", $conditions ):'';

		

		//Get ordering instructions

		$EM_Event = new EM_Event();

		$EM_Location = new EM_Location();

		$orderby = self::build_sql_orderby($args, array_keys(array_merge($EM_Event->fields, $EM_Location->fields)), get_option('dbem_events_default_order'));

		//Now, build orderby sql

		$orderby_sql = ( count($orderby) > 0 ) ? 'ORDER BY '. implode(', ', $orderby) : '';

		

		//Create the SQL statement and execute

		

		if( EM_MS_GLOBAL ){

			$selectors = ( $count ) ?  'COUNT(*)':$events_table.'.post_id, '.$events_table.'.blog_id';

		}else{

			$selectors = ( $count ) ?  'COUNT(*)':$events_table.'.post_id';

		}

		

		$sql = "

			SELECT $selectors FROM $events_table

			LEFT JOIN $locations_table ON {$locations_table}.location_id={$events_table}.location_id

			$where

			$orderby_sql

			$limit $offset

		";



		//If we're only counting results, return the number of results

		if( $count ){

			return apply_filters('em_events_get_count', $wpdb->get_var($sql), $args);		

		}

		$results = $wpdb->get_results( apply_filters('em_events_get_sql',$sql, $args), ARRAY_A);



		//If we want results directly in an array, why not have a shortcut here?

		if( $args['array'] == true ){

			return apply_filters('em_events_get_array',$results, $args);

		}

		

		//Make returned results EM_Event objects

		$results = (is_array($results)) ? $results:array();

		$events = array();

		

		if( EM_MS_GLOBAL ){

			foreach ( $results as $event ){

				$events[] = em_get_event($event['post_id'], $event['blog_id']);

			}

		}else{

			foreach ( $results as $event ){

				$events[] = em_get_event($event['post_id'], 'post_id');

			}

		}

		

		return apply_filters('em_events_get', $events, $args);

	}

	

	/**

	 * Returns the number of events on a given date

	 * @param $date

	 * @return int

	 */

	function count_date($date){

		global $wpdb;

		$table_name = EM_EVENTS_TABLE;

		$sql = "SELECT COUNT(*) FROM  $table_name WHERE (event_start_date  like '$date') OR (event_start_date <= '$date' AND event_end_date >= '$date');";

		return apply_filters('em_events_count_date', $wpdb->get_var($sql));

	}

	

	function count( $args = array() ){

		return apply_filters('em_events_count', self::get($args, true), $args);

	}

	

	/**

	 * Will delete given an array of event_ids or EM_Event objects

	 * @param unknown_type $id_array

	 */

	function delete( $array ){

		global $wpdb;

		//Detect array type and generate SQL for event IDs

		$results = array();

		if( !empty($array) && @get_class(current($array)) != 'EM_Event' ){

			$events = self::get($array);

		}else{

			$events = $array;

		}

		$event_ids = array();

		foreach ($events as $EM_Event){

		    $event_ids[] = $EM_Event->event_id;

			$results[] = $EM_Event->delete();

		}

		//TODO add better error feedback on events delete fails

		return apply_filters('em_events_delete',  in_array(false, $results), $event_ids);

	}

	

	

	/**

	 * Output a set of matched of events. You can pass on an array of EM_Events as well, in this event you can pass args in second param.

	 * Note that you can pass a 'pagination' boolean attribute to enable pagination, default is enabled (true). 

	 * @param array $args

	 * @param array $secondary_args

	 * @return string

	 */

	function output( $args ){

		global $EM_Event;

		$EM_Event_old = $EM_Event; //When looping, we can replace EM_Event global with the current event in the loop

		//Can be either an array for the get search or an array of EM_Event objects

		$func_args = func_get_args();

		$page = 1; //default

		if( !array_key_exists('page',$args) && !empty($_REQUEST['pno']) && is_numeric($_REQUEST['pno']) ){

			$page = $args['page'] = $_REQUEST['pno'];

		}

		if( is_object(current($args)) && get_class((current($args))) == 'EM_Event' ){

			$func_args = func_get_args();

			$events = $func_args[0];

			$args = (!empty($func_args[1]) && is_array($func_args[1])) ? $func_args[1] : array();

			$args = apply_filters('em_events_output_args', self::get_default_search($args), $events);

			$limit = ( !empty($args['limit']) && is_numeric($args['limit']) ) ? $args['limit']:false;

			$offset = ( !empty($args['offset']) && is_numeric($args['offset']) ) ? $args['offset']:0;

			$page = ( !empty($args['page']) && is_numeric($args['page']) ) ? $args['page']:$page;

			$events_count = count($events);

		}else{

			//Firstly, let's check for a limit/offset here, because if there is we need to remove it and manually do this

			$args = apply_filters('em_events_output_args', self::get_default_search($args) );

			$limit = ( !empty($args['limit']) && is_numeric($args['limit']) ) ? $args['limit']:false;

			$offset = ( !empty($args['offset']) && is_numeric($args['offset']) ) ? $args['offset']:0;

			$page = ( !empty($args['page']) && is_numeric($args['page']) ) ? $args['page']:$page;

			$args_count = $args;

			$args_count['limit'] = false;

			$args_count['offset'] = false;

			$args_count['page'] = false;

			$events_count = self::count($args_count);

			$events = self::get( $args );

		}

		//What format shall we output this to, or use default

		$format = ( empty($args['format']) ) ? get_option( 'dbem_event_list_item_format' ) : $args['format'] ;

		

		$output = "";

		$events = apply_filters('em_events_output_events', $events);

		if ( $events_count > 0 ) {

			foreach ( $events as $EM_Event ) {

				$output .= $EM_Event->output($format);

			}

			//Add headers and footers to output

			if( $format == get_option ( 'dbem_event_list_item_format' ) ){

				$format_header = ( get_option( 'dbem_event_list_item_format_header') == '' ) ? '':get_option ( 'dbem_event_list_item_format_header' );

				$format_footer = ( get_option ( 'dbem_event_list_item_format_footer' ) == '' ) ? '':get_option ( 'dbem_event_list_item_format_footer' );

			}else{

				$format_header = ( !empty($args['format_header']) ) ? $args['format_header']:'';

				$format_footer = ( !empty($args['format_footer']) ) ? $args['format_footer']:'';

			}

			$output = $format_header .  $output . $format_footer;

			//Pagination (if needed/requested)

			if( !empty($args['pagination']) && !empty($limit) && $events_count > $limit ){

				//Show the pagination links (unless there's less than $limit events)

				$page_link_template = preg_replace('/(&|\?)pno=\d+/i','',$_SERVER['REQUEST_URI']);

				$page_link_template = em_add_get_params($page_link_template, array('pno'=>'%PAGE%'), false); //don't html encode, so em_paginate does its thing;

				$output .= apply_filters('em_events_output_pagination', em_paginate( $page_link_template, $events_count, $limit, $page), $page_link_template, $events_count, $limit, $page);

			}

		} else {

			$output = get_option ( 'dbem_no_events_message' );

		}	

		

		//TODO check if reference is ok when restoring object, due to changes in php5 v 4

		$EM_Event = $EM_Event_old;

		$output = apply_filters('em_events_output', $output, $events, $args);

		return $output;		

	}

	

	function can_manage($event_ids){

		global $wpdb;

		if( current_user_can('edit_others_events') ){

			return apply_filters('em_events_can_manage', true, $event_ids);

		}

		if( EM_Object::array_is_numeric($event_ids) ){

			$condition = implode(" OR event_id=", $event_ids);

			//we try to find any of these events that don't belong to this user

			$results = $wpdb->get_var("SELECT COUNT(*) FROM ". EM_EVENTS_TABLE ." WHERE event_owner != '". get_current_user_id() ."' event_id=$condition;");

			return apply_filters('em_events_can_manage', ($results == 0), $event_ids);

		}

		return apply_filters('em_events_can_manage', false, $event_ids);

	}

	

	function get_post_search($args = array(), $filter = false){

		if( !empty($_REQUEST['em_search']) && empty($args['search']) ) $_REQUEST['search'] = $_REQUEST['em_search'];

		if( !empty($_REQUEST['category']) && $_REQUEST['category'] == -1  ) $_REQUEST['category'] = $args['category'] = 0;

		$accepted_searches = apply_filters('em_accepted_searches', array('scope','search','category','country','state','region','town'), $args);

		foreach($_REQUEST as $post_key => $post_value){

			if( in_array($post_key, $accepted_searches) && !empty($post_value) ){

				if(is_array($post_value)){

					$post_value = implode(',',$post_value);

				}

				if($post_value != ',' ){

					$args[$post_key] = $post_value;

				}elseif( $post_value == ',' && $post_key == 'scope' ){

					$args['scope'] = get_option('dbem_events_page_scope');

				}

			}

		}

		if( $filter ){

			foreach($args as $arg_key => $arg_value){

				if( !in_array($arg_key, $accepted_searches) ){

					unset($args[$arg_key]);

				}

			}

		}

		return apply_filters('em_events_get_post_search', $args);

	}



	/* Overrides EM_Object method to apply a filter to result

	 * @see wp-content/plugins/events-manager/classes/EM_Object#build_sql_conditions()

	 */

	function build_sql_conditions( $args = array() ){

		$conditions = parent::build_sql_conditions($args);

		if( !empty($args['search']) ){

			$like_search = array('event_name',EM_EVENTS_TABLE.'.post_content','location_name','location_address','location_town','location_postcode','location_state','location_country');

			$conditions['search'] = "(".implode(" LIKE '%{$args['search']}%' OR ", $like_search). "  LIKE '%{$args['search']}%')";

		}

		if( array_key_exists('status',$args) && is_numeric($args['status']) ){

			$null = ($args['status'] == 0) ? ' OR `event_status` = 0':'';

			$conditions['status'] = "(`event_status`={$args['status']}{$null} )";

		}elseif( empty($args['status']) || $args['status'] != 'all'){

			$conditions['status'] = "(`event_status` IS NOT NULL )"; //by default, we don't ever show deleted items

		}

		//private events

		if( empty($args['private']) ){

			$conditions['private'] = "(`event_private`=0)";			

		}elseif( !empty($args['private_only']) ){

			$conditions['private_only'] = "(`event_private`=1)";

		}

		if( EM_MS_GLOBAL && !empty($args['blog']) ){

		    if( is_numeric($args['blog']) ){

				if( is_main_site($args['blog']) ){

					$conditions['blog'] = "(".EM_EVENTS_TABLE.".blog_id={$args['blog']} OR ".EM_EVENTS_TABLE.".blog_id IS NULL)";

				}else{

					$conditions['blog'] = "(".EM_EVENTS_TABLE.".blog_id={$args['blog']})";

				}

		    }else{

		        if( !is_array($args['blog']) && preg_match('/^([\-0-9],?)+$/', $args['blog']) ){

		            $conditions['blog'] = "(".EM_EVENTS_TABLE.".blog_id IN ({$args['blog']}) )";

			    }elseif( is_array($args['blog']) && $this->array_is_numeric($args['blog']) ){

			        $conditions['blog'] = "(".EM_EVENTS_TABLE.".blog_id IN (".implode(',',$args['blog']).") )";

			    }

		    }

		}

		if( $args['bookings'] === 'user' && is_user_logged_in()){

			//get bookings of user

			$EM_Person = new EM_Person(get_current_user_id());

			$booking_ids = $EM_Person->get_bookings(true);

			if( count($booking_ids) > 0 ){

				$conditions['bookings'] = "(event_id IN (SELECT event_id FROM ".EM_BOOKINGS_TABLE." WHERE booking_id IN (".implode(',',$booking_ids).")))";

			}else{

				$conditions['bookings'] = "(event_id = 0)";

			}

		}

		//post search

		if( !empty($args['post_id'])){

			if( is_array($args['post_id']) ){

				$conditions['post_id'] = "(".EM_EVENTS_TABLE.".post_id IN (".implode(',',$args['post_id'])."))";

			}else{

				$conditions['post_id'] = "(".EM_EVENTS_TABLE.".post_id={$args['post_id']})";

			}

		}

		return apply_filters( 'em_events_build_sql_conditions', $conditions, $args );

	}

	

	/* Overrides EM_Object method to apply a filter to result

	 * @see wp-content/plugins/events-manager/classes/EM_Object#build_sql_orderby()

	 */

	function build_sql_orderby( $args, $accepted_fields, $default_order = 'ASC' ){

		return apply_filters( 'em_events_build_sql_orderby', parent::build_sql_orderby($args, $accepted_fields, get_option('dbem_events_default_order')), $args, $accepted_fields, $default_order );

	}

	

	/* 

	 * Adds custom Events search defaults

	 * @param array $array

	 * @return array

	 * @uses EM_Object#get_default_search()

	 */

	function get_default_search( $array = array() ){

		$defaults = array(

			'orderby' => get_option('dbem_events_default_orderby'),

			'order' => get_option('dbem_events_default_order'),

			'bookings' => false, //if set to true, only events with bookings enabled are returned

			'status' => 1, //approved events only

			'format_header' => '', //events can have custom html above the list

			'format_footer' => '', //events can have custom html below the list

			'town' => false,

			'state' => false,

			'country' => false,

			'region' => false,

			'blog' => get_current_blog_id(),

			'private' => current_user_can('read_private_events'),

			'private_only' => false,

			'post_id' => false

		);

		if( EM_MS_GLOBAL && !is_admin() ){

			if( empty($array['blog']) && is_main_site() && get_site_option('dbem_ms_global_events') ){

			    $array['blog'] = false;

			}

		}

		if( is_admin() ){

			//figure out default owning permissions

			$defaults['owner'] = !current_user_can('edit_others_events') ? get_current_user_id() : false;

			if( !array_key_exists('status', $array) && current_user_can('edit_others_events') ){

				$defaults['status'] = false; //by default, admins see pending and live events

			}

		}

		return apply_filters('em_events_get_default_search', parent::get_default_search($defaults,$array), $array, $defaults);

	}



	//TODO Implement object and interators for handling groups of events.

    public function rewind(){

        reset($this->events);

    }

  

    public function current(){

        $var = current($this->events);

        return $var;

    }

  

    public function key(){

        $var = key($this->events);

        return $var;

    }

  

    public function next(){

        $var = next($this->events);

        return $var;

    }

  

    public function valid(){

        $key = key($this->events);

        $var = ($key !== NULL && $key !== FALSE);

        return $var;

    }

}

?>