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<?php
/**
* Various utilities.
*/
class scbUtil {
/**
* Force script enqueue.
*
* @param array $handles
*
* @return void
*/
public static function do_scripts( $handles ) {
global $wp_scripts;
if ( ! is_a( $wp_scripts, 'WP_Scripts' ) ) {
$wp_scripts = new WP_Scripts();
}
$wp_scripts->do_items( ( array ) $handles );
}
/**
* Force style enqueue.
*
* @param array $handles
*
* @return void
*/
public static function do_styles( $handles ) {
self::do_scripts( 'jquery' );
global $wp_styles;
if ( ! is_a( $wp_styles, 'WP_Styles' ) ) {
$wp_styles = new WP_Styles();
}
ob_start();
$wp_styles->do_items( ( array ) $handles );
$content = str_replace( array( "'", "\n" ), array( '"', '' ), ob_get_clean() );
echo "<script type='text/javascript'>\n";
echo "//<![CDATA[";
echo "jQuery(function ($) { $('head').prepend('$content'); });\n";
echo "//]]>";
echo "</script>";
}
/**
* Enable delayed plugin activation. To be used with scb_init()
*
* @param string $plugin
* @param string|array $callback
*
* @return void
*/
public static function add_activation_hook( $plugin, $callback ) {
if ( defined( 'SCB_LOAD_MU' ) ) {
register_activation_hook( $plugin, $callback );
} else {
add_action( 'scb_activation_' . plugin_basename( $plugin ), $callback );
}
}
/**
* Execute activation hook.
* For debugging.
*
* @param string $plugin
*
* @return void
*/
public static function do_activation( $plugin ) {
do_action( 'scb_activation_' . plugin_basename( $plugin ) );
}
/**
* Allows more than one uninstall hooks.
* Also prevents an UPDATE query on each page load.
*
* @param string $plugin
* @param string|array $callback
*
* @return void
*/
public static function add_uninstall_hook( $plugin, $callback ) {
if ( ! is_admin() ) {
return;
}
register_uninstall_hook( $plugin, '__return_false' ); // dummy
add_action( 'uninstall_' . plugin_basename( $plugin ), $callback );
}
/**
* Execute uninstall hook.
* For debugging.
*
* @param string $plugin
*
* @return void
*/
public static function do_uninstall( $plugin ) {
do_action( 'uninstall_' . plugin_basename( $plugin ) );
}
/**
* Get the current, full URL.
*
* @return string
*/
public static function get_current_url() {
return ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
}
/**
* Apply a function to each element of a ( nested ) array recursively.
*
* @param string|array $callback
* @param array $array
*
* @return array
*/
public static function array_map_recursive( $callback, $array ) {
array_walk_recursive( $array, array( __CLASS__, 'array_map_recursive_helper' ), $callback );
return $array;
}
public static function array_map_recursive_helper( &$val, $key, $callback ) {
$val = call_user_func( $callback, $val );
}
/**
* Extract certain $keys from $array.
*
* @deprecated WP 3.1
* @deprecated Use wp_array_slice_assoc()
* @see wp_array_slice_assoc()
*
* @param array $array
* @param array $keys
*
* @return array
*/
public static function array_extract( $array, $keys ) {
_deprecated_function( __CLASS__ . '::' . __FUNCTION__, 'WP 3.1', 'wp_array_slice_assoc()' );
return wp_array_slice_assoc( $array, $keys );
}
/**
* Extract a certain value from a list of arrays.
*
* @deprecated WP 3.1
* @deprecated Use wp_list_pluck()
* @see wp_list_pluck()
*
* @param array $array
* @param string $key
*
* @return array
*/
public static function array_pluck( $array, $key ) {
_deprecated_function( __CLASS__ . '::' . __FUNCTION__, 'WP 3.1', 'wp_list_pluck()' );
return wp_list_pluck( $array, $key );
}
/**
* Transform a list of objects into an associative array.
*
* @deprecated r41
* @deprecated Use scb_list_fold()
* @see scb_list_fold()
*
* @param array $objects
* @param string $key
* @param string $value
*
* @return array
*/
public static function objects_to_assoc( $objects, $key, $value ) {
_deprecated_function( __CLASS__ . '::' . __FUNCTION__, 'r41', 'scb_list_fold()' );
return scb_list_fold( $objects, $key, $value );
}
/**
* Prepare an array for an IN statement.
*
* @param array $values
*
* @return string
*/
public static function array_to_sql( $values ) {
foreach ( $values as &$val ) {
$val = "'" . esc_sql( trim( $val ) ) . "'";
}
return implode( ',', $values );
}
/**
* Example: split_at( '</', '<a></a>' ) => array( '<a>', '</a>' )
*
* @param string $delim
* @param string $str
*
* @return array
*/
public static function split_at( $delim, $str ) {
$i = strpos( $str, $delim );
if ( false === $i ) {
return false;
}
$start = substr( $str, 0, $i );
$finish = substr( $str, $i );
return array( $start, $finish );
}
}
/**
* Return a standard admin notice.
*
* @param string $msg
* @param string $class (optional)
*
* @return string
*/
function scb_admin_notice( $msg, $class = 'updated' ) {
return html( "div class='$class fade'", html( "p", $msg ) );
}
/**
* Transform a list of objects into an associative array.
*
* @param array $objects
* @param string $key
* @param string $value
*
* @return array
*/
function scb_list_fold( $list, $key, $value ) {
$r = array();
if ( is_array( reset( $list ) ) ) {
foreach ( $list as $item ) {
$r[ $item[ $key ] ] = $item[ $value ];
}
} else {
foreach ( $list as $item ) {
$r[ $item->$key ] = $item->$value;
}
}
return $r;
}
/**
* Splits a list into sets, grouped by the result of running each value through $fn.
*
* @param array $list List of items to be partitioned.
* @param callback $fn Function that takes an element and returns a string key.
*
* @return array
*/
function scb_list_group_by( $list, $fn ) {
$groups = array();
foreach ( $list as $item ) {
$key = call_user_func( $fn, $item );
if ( null === $key ) {
continue;
}
$groups[ $key ][] = $item;
}
return $groups;
}
//_____Database Table Utilities_____
/**
* Register a table with $wpdb.
*
* @param string $key The key to be used on the $wpdb object.
* @param string $name (optional) The actual name of the table, without $wpdb->prefix.
*
* @return void
*/
function scb_register_table( $key, $name = false ) {
global $wpdb;
if ( ! $name ) {
$name = $key;
}
$wpdb->tables[] = $name;
$wpdb->$key = $wpdb->prefix . $name;
}
/**
* Runs the SQL query for installing/upgrading a table.
*
* @param string $key The key used in scb_register_table().
* @param string $columns The SQL columns for the CREATE TABLE statement.
* @param array $opts (optional) Various other options.
*
* @return void
*/
function scb_install_table( $key, $columns, $opts = array() ) {
global $wpdb;
$full_table_name = $wpdb->$key;
if ( is_string( $opts ) ) {
$opts = array( 'upgrade_method' => $opts );
}
$opts = wp_parse_args( $opts, array(
'upgrade_method' => 'dbDelta',
'table_options' => '',
) );
$charset_collate = '';
if ( $wpdb->has_cap( 'collation' ) ) {
if ( ! empty( $wpdb->charset ) ) {
$charset_collate = "DEFAULT CHARACTER SET $wpdb->charset";
}
if ( ! empty( $wpdb->collate ) ) {
$charset_collate .= " COLLATE $wpdb->collate";
}
}
$table_options = $charset_collate . ' ' . $opts['table_options'];
if ( 'dbDelta' == $opts['upgrade_method'] ) {
require_once ABSPATH . 'wp-admin/includes/upgrade.php';
dbDelta( "CREATE TABLE $full_table_name ( $columns ) $table_options" );
return;
}
if ( 'delete_first' == $opts['upgrade_method'] ) {
$wpdb->query( "DROP TABLE IF EXISTS $full_table_name;" );
}
$wpdb->query( "CREATE TABLE IF NOT EXISTS $full_table_name ( $columns ) $table_options;" );
}
/**
* Runs the SQL query for uninstalling a table.
*
* @param string $key The key used in scb_register_table().
*
* @return void
*/
function scb_uninstall_table( $key ) {
global $wpdb;
$wpdb->query( "DROP TABLE IF EXISTS " . $wpdb->$key );
}
//_____Minimalist HTML framework_____
/**
* Generate an HTML tag. Atributes are escaped. Content is NOT escaped.
*
* @param string $tag
*
* @return string
*/
if ( ! function_exists( 'html' ) ):
function html( $tag ) {
static $SELF_CLOSING_TAGS = array( 'area', 'base', 'basefont', 'br', 'hr', 'input', 'img', 'link', 'meta' );
$args = func_get_args();
$tag = array_shift( $args );
if ( is_array( $args[0] ) ) {
$closing = $tag;
$attributes = array_shift( $args );
foreach ( $attributes as $key => $value ) {
if ( false === $value ) {
continue;
}
if ( true === $value ) {
$value = $key;
}
$tag .= ' ' . $key . '="' . esc_attr( $value ) . '"';
}
} else {
list( $closing ) = explode( ' ', $tag, 2 );
}
if ( in_array( $closing, $SELF_CLOSING_TAGS ) ) {
return "<{$tag} />";
}
$content = implode( '', $args );
return "<{$tag}>{$content}</{$closing}>";
}
endif;
/**
* Generate an <a> tag.
*
* @param string $url
* @param string $title (optional)
*
* @return string
*/
if ( ! function_exists( 'html_link' ) ):
function html_link( $url, $title = '' ) {
if ( empty( $title ) ) {
$title = $url;
}
return html( 'a', array( 'href' => esc_url( $url ) ), $title );
}
endif;
/**
* Returns an array of query flags.
*
* @param object $wp_query (optional)
*
* @return array
*/
function scb_get_query_flags( $wp_query = null ) {
if ( ! $wp_query ) {
$wp_query = $GLOBALS['wp_query'];
}
$flags = array();
foreach ( get_object_vars( $wp_query ) as $key => $val ) {
if ( 'is_' == substr( $key, 0, 3 ) && $val ) {
$flags[] = substr( $key, 3 );
}
}
return $flags;
}
//_____Compatibility layer_____
/**
* Update data from a post field based on Post ID.
* @see https://core.trac.wordpress.org/ticket/10946
*
* @param string $field Post field name.
* @param string $value Post field value.
* @param int $post_id Post ID.
*
* @return bool Result of UPDATE query.
*/
if ( ! function_exists( 'set_post_field' ) ) :
function set_post_field( $field, $value, $post_id ) {
global $wpdb;
$post_id = absint( $post_id );
$value = sanitize_post_field( $field, $value, $post_id, 'db' );
return $wpdb->update( $wpdb->posts, array( $field => $value ), array( 'ID' => $post_id ) );
}
endif;