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<?php
/*
Written by Chris Jean for iThemes.com
Version 1.3.2
Version History
1.3.0 - 2011-02-22
Added check to ensure that the code only runs after the init hook
1.3.1 - 2012-06-22 - Chris Jean
Changed the early_call checks from errors (causing fatal errors) to
warnings. This prevents sites from breaking in the event that older
code is doing things incorrectly.
1.3.2 - 2013-05-21 - Chris Jean
Removed assign by reference.
To-Do -
Add export/import routines for all storage and theme-specific
*/
if ( ! class_exists( 'ITStorage' ) ) {
class ITStorage {
var $_base_option = 'it-storage';
var $_global_index = 'global_data';
var $_theme_index = '';
var $_var = '';
var $_global = false;
var $_storage_version = '';
var $_suppress_errors = false;
var $_data = false;
var $_loaded = false;
function ITStorage( $var, $global = false, $storage_version = '0', $suppress_errors = false ) {
$this->_var = $var;
$this->_global = $global;
$this->_storage_version = $storage_version;
$this->_suppress_errors = $suppress_errors;
if ( empty( $this->_var ) )
ITError::fatal( 'empty_parameter:0', 'Unable to store or retrieve data due to empty first parameter passed to ITStorage.' );
if ( it_classes_has_init_run() )
$this->filter_vars();
else
add_action( 'init', array( &$this, 'filter_vars' ), -10 );
add_action( 'it_storage_reset', array( &$this, 'reset' ) );
add_action( 'it_storage_remove', array( &$this, 'remove' ) );
add_action( "it_storage_clear_cache_{$this->_var}", array( &$this, 'clear_cache' ) );
add_action( "it_storage_save_{$this->_var}", array( &$this, 'save' ) );
add_action( "it_storage_reset_{$this->_var}", array( &$this, 'reset' ) );
add_action( "it_storage_remove_{$this->_var}", array( &$this, 'remove' ) );
add_filter( "it_storage_load_{$this->_var}", array( &$this, 'load' ) );
}
function _remove_filters() {
remove_action( 'it_storage_reset', array( &$this, 'reset' ) );
remove_action( 'it_storage_remove', array( &$this, 'remove' ) );
remove_action( "it_storage_clear_cache_{$this->_var}", array( &$this, 'clear_cache' ) );
remove_action( "it_storage_save_{$this->_var}", array( &$this, 'save' ) );
remove_action( "it_storage_reset_{$this->_var}", array( &$this, 'reset' ) );
remove_action( "it_storage_remove_{$this->_var}", array( &$this, 'remove' ) );
remove_filter( "it_storage_load_{$this->_var}", array( &$this, 'load' ) );
}
function clear_cache() {
$this->_data = false;
unset( $GLOBALS["it_storage_cache_{$this->_var}"] );
}
function load( $merge_defaults = true ) {
if ( true !== $this->_loaded ) {
ITError::warn( 'early_call:ITStorage:load', 'ITStorage::load() called too early. ITStorage has not fully loaded yet. You must wait until after the init action priority -10.' );
return;
}
if ( isset( $GLOBALS["it_storage_cache_{$this->_var}"] ) )
return $GLOBALS["it_storage_cache_{$this->_var}"];
$options = @get_option( $this->_base_option );
$data = array();
if ( true === $this->_global ) {
if ( isset( $options[$this->_global_index][$this->_var] ) )
$data = $options[$this->_global_index][$this->_var];
}
else {
if ( isset( $options['themes'][$this->_theme_index][$this->_var] ) )
$data = $options['themes'][$this->_theme_index][$this->_var];
}
$original_data = $data;
if ( true === $merge_defaults ) {
$defaults = apply_filters( "it_storage_get_defaults_{$this->_var}", array() );
if ( ! is_array( $defaults ) )
$defaults = array();
$data = ITUtility::merge_defaults( $data, $defaults );
}
if ( ! isset( $data['storage_version'] ) )
$data['storage_version'] = '0';
$data = apply_filters( "it_storage_filter_load_{$this->_var}", $data );
if ( version_compare( $this->_storage_version, $data['storage_version'], '>' ) ) {
do_action( "it_storage_do_upgrade_{$this->_var}" );
$upgrade_data = apply_filters( "it_storage_upgrade_{$this->_var}", array( 'data' => $data, 'current_version' => $this->_storage_version ) );
$data = $upgrade_data['data'];
}
$this->_data = $data;
$GLOBALS["it_storage_cache_{$this->_var}"] = $data;
if ( $original_data !== $data )
$this->save( $data );
return $data;
}
function save( $data ) {
if ( true !== $this->_loaded ) {
ITError::warn( 'early_call:ITStorage:save', 'ITStorage::save() called too early. ITStorage has not fully loaded yet. You must wait until after the init action priority -10.' );
return;
}
$data = apply_filters( "it_storage_filter_save_{$this->_var}", $data );
$options = @get_option( $this->_base_option );
if ( true === $this->_global )
$options[$this->_global_index][$this->_var] = $data;
else
$options['themes'][$this->_theme_index][$this->_var] = $data;
$this->_data = $data;
$GLOBALS["it_storage_cache_{$this->_var}"] = $data;
return @update_option( $this->_base_option, $options );
}
// Removes the existing data and saves the default data
function reset() {
$this->remove();
}
// Removes this storage location from the data
function remove() {
if ( true !== $this->_loaded ) {
ITError::warn( 'early_call:ITStorage:remove', 'ITStorage::remove() called too early. ITStorage has not fully loaded yet. You must wait until after the init action priority -10.' );
return;
}
$options = @get_option( $this->_base_option );
if ( true === $this->_global )
unset( $options[$this->_global_index][$this->_var] );
else if ( ! empty( $options['themes'][$this->_theme_index] ) && is_array( $options['themes'][$this->_theme_index] ) )
unset( $options['themes'][$this->_theme_index][$this->_var] );
@update_option( $this->_base_option, $options );
$this->clear_cache();
$this->load();
}
function filter_vars() {
$this->_base_option = apply_filters( 'it_storage_filter_base_option', $this->_base_option );
$this->_base_option = apply_filters( "it_storage_filter_base_option_{$this->_var}", $this->_base_option );
if ( empty( $this->_base_option ) ) {
if ( false === $this->_suppress_errors )
ITError::fatal( 'empty_var:filter_result:it_storage_filter_base_option', 'Unable to store or retrieve data due to missing base option.' );
$this->_remove_filters();
}
$this->_global_index = apply_filters( 'it_storage_filter_global_index', $this->_global_index );
$this->_global_index = apply_filters( "it_storage_filter_global_index_{$this->_var}", $this->_global_index );
if ( empty( $this->_global_index ) ) {
if ( false === $this->_suppress_errors )
ITError::fatal( 'empty_var:filter_result:it_storage_filter_global_index', 'Unable to store or retrieve data due to missing global index.' );
$this->_remove_filters();
}
$this->_theme_index = apply_filters( 'it_storage_filter_theme_index', '' );
if ( empty( $this->_theme_index ) && ( true !== $this->_global ) ) {
if ( false === $this->_suppress_errors )
ITError::fatal( 'empty_var:filter_result:it_storage_filter_theme_index', 'Unable to store or retrieve data due to missing theme index.' . "<br />Var: {$this->_var}" );
$this->_remove_filters();
}
$this->_loaded = true;
}
}
}
if ( ! class_exists( 'ITStorage2' ) ) {
class ITStorage2 {
var $_var = '';
var $_storage_version = '';
var $_autoload = true;
var $_data = false;
function ITStorage2( $var, $args = array() ) {
if ( is_string( $args ) )
$args = array( 'version' => $args );
$default_args = array(
'version' => 0,
'autoload' => true,
);
$args = wp_parse_args( $args, $default_args );
$this->_var = $var;
$this->_option_name = "it-storage-$var";
$this->_storage_version = $args['version'];
$this->_autoload = ( ! $args['autoload'] || ( 'no' === $args['autoload'] ) ) ? 'no' : 'yes';
if ( empty( $this->_var ) )
ITError::fatal( 'empty_parameter:0', 'Unable to store or retrieve data due to empty first parameter passed to ITStorage2.' );
add_action( 'it_storage_reset', array( &$this, 'reset' ) );
add_action( 'it_storage_remove', array( &$this, 'remove' ) );
add_action( "it_storage_clear_cache_{$this->_var}", array( &$this, 'clear_cache' ) );
add_action( "it_storage_save_{$this->_var}", array( &$this, 'save' ) );
add_action( "it_storage_reset_{$this->_var}", array( &$this, 'reset' ) );
add_action( "it_storage_remove_{$this->_var}", array( &$this, 'remove' ) );
add_filter( "it_storage_load_{$this->_var}", array( &$this, 'load' ) );
}
function _remove_filters() {
remove_action( 'it_storage_reset', array( &$this, 'reset' ) );
remove_action( 'it_storage_remove', array( &$this, 'remove' ) );
remove_action( "it_storage_clear_cache_{$this->_var}", array( &$this, 'clear_cache' ) );
remove_action( "it_storage_save_{$this->_var}", array( &$this, 'save' ) );
remove_action( "it_storage_reset_{$this->_var}", array( &$this, 'reset' ) );
remove_action( "it_storage_remove_{$this->_var}", array( &$this, 'remove' ) );
remove_filter( "it_storage_load_{$this->_var}", array( &$this, 'load' ) );
}
function load( $merge_defaults = true ) {
if ( isset( $GLOBALS["it_storage_cache_{$this->_var}"] ) )
return $GLOBALS["it_storage_cache_{$this->_var}"];
$data = $original_data = @get_option( $this->_option_name );
if ( true === $merge_defaults ) {
$defaults = apply_filters( "it_storage_get_defaults_{$this->_var}", array() );
if ( ! is_array( $defaults ) )
$defaults = array();
$data = ITUtility::merge_defaults( $data, $defaults );
}
if ( ! isset( $data['storage_version'] ) ) {
$data['storage_version'] = '0';
// $data = $this->_migrate_old_data( $data );
}
$data = apply_filters( "it_storage_filter_load_{$this->_var}", $data );
if ( version_compare( $this->_storage_version, $data['storage_version'], '>' ) ) {
do_action( "it_storage_do_upgrade_{$this->_var}" );
$upgrade_data = apply_filters( "it_storage_upgrade_{$this->_var}", array( 'data' => $data, 'current_version' => $this->_storage_version ) );
$data = $upgrade_data['data'];
}
$this->_data = $data;
$GLOBALS["it_storage_cache_{$this->_var}"] = $data;
if ( $original_data !== $data )
$this->save( $data );
return $data;
}
function save( $data ) {
$data = apply_filters( "it_storage_filter_save_{$this->_var}", $data );
$old_data = @get_option( $this->_option_name );
if ( $data === $old_data )
return true;
if ( false === $old_data )
return @add_option( $this->_option_name, $data, '', $this->_autoload );
return @update_option( $this->_option_name, $data );
}
/* function migrate_old_data( $var, $global = false, $storage_version = '0', $suppress_errors = false ) {
$store = new ITStorage( $var, $global, $storage_version, $suppress_errors );
$data = $store->load( false );
$store->remove();
unset( $store );
return $data;
}*/
function clear_cache() {
$this->_data = false;
unset( $GLOBALS["it_storage_cache_{$this->_var}"] );
}
// Removes the existing data and saves the default data
function reset() {
$this->remove();
}
// Removes this storage location from the data
function remove() {
@delete_option( $this->_option_name );
$this->clear_cache();
$this->load();
}
}
}