Current File : //var/www/pn/wp-content/plugins/wysija-newsletters/core/module/statistics_model.php
<?php
defined('WYSIJA') or die('Restricted access');
class WYSIJA_module_statistics_model extends WYSIJA_model {
const STATS_DATE_OF_CREATION = 'STATS_DATE_OF_CREATION';
/**
* Time to live of stats data
*/
const STATS_DATA_LIFE_TIME = 3600; // 1h * 60mins * 60s
/**
* Time to live of stats's table (structure)
*/
const STATS_TABLE_LIFE_TIME = 86400; // 24h * 60mins * 60s
const STATS_PREFIX = 'sc_'; // prefix of stat tables
public function __construct() {
parent::__construct();
$this->clean_up_out_of_date_tables();
}
/**
*
* @param array $params array of input params
*/
public function get_hash(Array $params) {
$hash = md5(get_class($this) . json_encode($params));
return substr($hash, 0, 8);// Only get 8 first characters to not make table name too long (less than 64)
}
/**
* set a date of creating temporary tables, useful for caching
* @return type
*/
protected function set_date_of_creation() {
$config = WYSIJA::get('config', 'model');
return $config->save(array(self::STATS_DATE_OF_CREATION => time()));
}
/**
* Check if cache life time is out of date
* @return boolean
*/
protected function is_data_out_of_date() {
$config = WYSIJA::get('config', 'model');
$date_of_creation = $config->getValue(self::STATS_DATE_OF_CREATION);
return (time() - $date_of_creation >= self::STATS_DATA_LIFE_TIME);
}
/**
* Get the list of tables which are out of date, based on create_time
* @return type
*/
protected function get_out_of_date_tables() {
$query = '
SELECT
TABLE_NAME as table_name
FROM
INFORMATION_SCHEMA.TABLES
WHERE
TABLE_SCHEMA IN (SELECT DATABASE())
AND (TABLE_NAME LIKE "[wysija]'.self::STATS_PREFIX.'%" OR TABLE_NAME LIKE "[wysija]stats_cache_%")
AND TIMESTAMPDIFF(SECOND,CREATE_TIME, NOW()) >= '.self::STATS_TABLE_LIFE_TIME.';
';
return $this->get_results($query);
}
/**
* Auto cleanup out-of-date tables
*/
protected function clean_up_out_of_date_tables() {
$tables = $this->get_out_of_date_tables();
if (!empty($tables) && is_array($tables)) {
$_temp = array();
foreach ($tables as $table)
if (!empty($table['table_name']))
$_temp[] = $table['table_name'];
}
if (!empty($_temp)) {
$query = 'DROP TABLE IF EXISTS `'. implode('`,`', $_temp).'`';
$this->get_results($query);
}
}
/**
* Check if a table exists
* @param string $table_name table name
* @return boolean
*/
protected function does_table_exists($table_name = null) {
if (empty($table_name) OR !is_string($table_name))
return false;
$query = "SHOW TABLES LIKE '$table_name'";
$result = $this->get_results($query);
return !empty($result) ? true : false;
}
/**
* Generate a table name, based on input params
* @param type $params
*/
protected function get_table_name($params) {
$hash = $this->get_hash($params);
return '[wysija]' . self::STATS_PREFIX . $hash;
}
/**
* Generate a cached table
* @param type $table_name
* @param array $queries_create_table query to create a new cached table
* @param array $queries_insert_data query to collect and insert data to the newly created/truncated table
* @return boolean
*/
protected function generate_table($table_name, Array $queries_create_table, Array $queries_insert_data) {
$is_out_of_date = $this->is_data_out_of_date();
$does_table_exists = $this->does_table_exists($table_name);
if (!$is_out_of_date && $does_table_exists)
return true;
if ($does_table_exists) {
$this->query('TRUNCATE TABLE `' . $table_name . '`');
} else {
foreach ($queries_create_table as $query_create_table)
$this->query($query_create_table);
}
foreach ($queries_insert_data as $query_insert_data)
$this->query($query_insert_data);
if ($is_out_of_date) {
$this->set_date_of_creation();
}
return true;
}
}
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