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Helper.php
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Helper.php
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<?php
namespace Timber;
use Exception;
use InvalidArgumentException;
use stdClass;
use Timber\Factory\PostFactory;
use WP_List_Util;
use WP_Post;
use WP_Term;
use WP_User;
/**
* Class Helper
*
* As the name suggests these are helpers for Timber (and you!) when developing. You can find additional
* (mainly internally-focused helpers) in Timber\URLHelper.
* @api
*/
class Helper
{
/**
* A utility for a one-stop shop for transients.
*
* @api
* @example
* ```php
* $context = Timber::context( [
* 'favorites' => Timber\Helper::transient( 'user-' . $uid . '-favorites' , function() use ( $uid ) {
* // Some expensive query here that’s doing something you want to store to a transient.
* return $favorites;
* }, 600 ),
* ] );
*
* Timber::render('single.twig', $context);
* ```
*
* @param string $slug Unique identifier for transient
* @param callable $callback Callback that generates the data that's to be cached
* @param integer $transient_time (optional) Expiration of transients in seconds
* @param integer $lock_timeout (optional) How long (in seconds) to lock the transient to prevent race conditions
* @param boolean $force (optional) Force callback to be executed when transient is locked
*
* @return mixed
*/
public static function transient($slug, $callback, $transient_time = 0, $lock_timeout = 5, $force = false)
{
/**
* Filters the transient slug.
*
* This might be useful if you are using a multilingual solution.
*
* @since 0.22.6
*
* @param string $slug The slug for the transient.
*/
$slug = \apply_filters('timber/transient/slug', $slug);
$enable_transients = ($transient_time === false || (\defined('WP_DISABLE_TRANSIENTS') && WP_DISABLE_TRANSIENTS)) ? false : true;
$data = $enable_transients ? \get_transient($slug) : false;
if (false === $data) {
$data = self::handle_transient_locking($slug, $callback, $transient_time, $lock_timeout, $force, $enable_transients);
}
return $data;
}
/**
* Does the dirty work of locking the transient, running the callback and unlocking.
*
* @internal
*
* @param string $slug Unique identifier for transient
* @param callable $callback Callback that generates the data that's to be cached
* @param integer $transient_time Expiration of transients in seconds
* @param integer $lock_timeout How long (in seconds) to lock the transient to prevent race conditions
* @param boolean $force Force callback to be executed when transient is locked
* @param boolean $enable_transients Force callback to be executed when transient is locked
*/
protected static function handle_transient_locking($slug, $callback, $transient_time, $lock_timeout, $force, $enable_transients)
{
if ($enable_transients && self::_is_transient_locked($slug)) {
/**
* Filters whether to force a locked transients to be regenerated.
*
* If a transient is locked, it means that another process is currently generating the data.
* If you want to force the transient to be regenerated, during that process, you can set this
* filter to true.
*
* @since 2.0.0
* @param bool $force Whether to force a locked transient to be regenerated.
*/
$force = \apply_filters('timber/transient/force_transients', $force);
/**
* Filters whether to force a locked transients to be regenerated.
*
* If a transient is locked, it means that another process is currently generating the data.
* If you want to force the transient to be regenerated, during that process, you can set this
* filter to true.
*
* @deprecated 2.0.0, use `timber/transient/force_transients`
*/
$force = \apply_filters_deprecated(
'timber_force_transients',
[$force],
'2.0.0',
'timber/transient/force_transients'
);
/**
* Filters whether to force a specific locked transients to be regenerated.
*
* If a transient is locked, it means that another process is currently generating the data.
* If you want to force the transient to be regenerated during that process, you can set this value to true.
*
* @example
* ```php
*
* add_filter( 'timber/transient/force_transient_mycustumslug', function($force) {
* if(false == something_special_has_occurred()){
* return false;
* }
*
* return true;
* }, 10 );
* ```
* @since 2.0.0
*
* @param bool $force Whether to force a locked transient to be regenerated.
*/
$force = \apply_filters("timber/transient/force_transient_{$slug}", $force);
/**
* Filters whether to force a specific locked transients to be regenerated.
*
* If a transient is locked, it means that another process is currently generating the data.
* If you want to force the transient to be regenerated, during that process, you can set this value to true.
* `$slug` The transient slug.
*
* @param bool $force Whether to force a locked transient to be regenerated.
* @deprecated 2.0.0, use `timber/transient/force_transient_{$slug}`
*/
$force = \apply_filters_deprecated(
"timber_force_transient_{$slug}",
[$force],
'2.0.0',
"timber/transient/force_transient_{$slug}"
);
if (!$force) {
//the server is currently executing the process.
//We're just gonna dump these users. Sorry!
return false;
}
$enable_transients = false;
}
// lock timeout shouldn't be higher than 5 seconds, unless
// remote calls with high timeouts are made here
if ($enable_transients) {
self::_lock_transient($slug, $lock_timeout);
}
$data = $callback();
if ($enable_transients) {
\set_transient($slug, $data, $transient_time);
self::_unlock_transient($slug);
}
return $data;
}
/**
* @internal
* @param string $slug
* @param integer $lock_timeout
*/
public static function _lock_transient($slug, $lock_timeout)
{
\set_transient($slug . '_lock', true, $lock_timeout);
}
/**
* @internal
* @param string $slug
*/
public static function _unlock_transient($slug)
{
\delete_transient($slug . '_lock');
}
/**
* @internal
* @param string $slug
*/
public static function _is_transient_locked($slug)
{
return (bool) \get_transient($slug . '_lock');
}
/* These are for measuring page render time */
/**
* For measuring time, this will start a timer.
*
* @api
* @return float
*/
public static function start_timer()
{
$time = \microtime();
$time = \explode(' ', $time);
$time = (float) $time[1] + (float) $time[0];
return $time;
}
/**
* For stopping time and getting the data.
*
* @api
* @example
* ```php
* $start = Timber\Helper::start_timer();
* // do some stuff that takes awhile
* echo Timber\Helper::stop_timer( $start );
* ```
*
* @param int $start
* @return string
*/
public static function stop_timer($start)
{
$time = \microtime();
$time = \explode(' ', $time);
$time = (float) $time[1] + (float) $time[0];
$finish = $time;
$total_time = \round(($finish - $start), 4);
return $total_time . ' seconds.';
}
/* Function Utilities
======================== */
/**
* Calls a function with an output buffer. This is useful if you have a function that outputs
* text that you want to capture and use within a twig template.
*
* @api
* @example
* ```php
* function the_form() {
* echo '<form action="form.php"><input type="text" /><input type="submit /></form>';
* }
*
* $context = Timber::context( [
* 'form' => Timber\Helper::ob_function( 'the_form' ),
* ] );
*
* Timber::render('single-form.twig', $context);
* ```
* ```twig
* <h1>{{ post.title }}</h1>
* {{ my_form }}
* ```
* ```html
* <h1>Apply to my contest!</h1>
* <form action="form.php"><input type="text" /><input type="submit /></form>
* ```
*
* @param callable $function
* @param array $args
*
* @return string
*/
public static function ob_function($function, $args = [null])
{
\ob_start();
\call_user_func_array($function, $args);
return \ob_get_clean();
}
/**
* Output a value (string, array, object, etc.) to the error log
*
* @api
* @return void
*/
public static function error_log(mixed $error)
{
global $timber_disable_error_log;
if (!WP_DEBUG || $timber_disable_error_log) {
return;
}
if (\is_object($error) || \is_array($error)) {
$error = \print_r($error, true);
}
return \error_log('[ Timber ] ' . $error);
}
/**
* Trigger a warning.
*
* @api
*
* @param string $message The warning that you want to output.
*
* @return void
*/
public static function warn($message)
{
if (!WP_DEBUG) {
return;
}
\trigger_error($message, E_USER_WARNING);
}
/**
* Marks something as being incorrectly called.
*
* There is a hook 'doing_it_wrong_run' that will be called that can be used
* to get the backtrace up to what file and function called the deprecated
* function.
*
* The current behavior is to trigger a user error if `WP_DEBUG` is true.
*
* If you want to catch errors like these in tests, then add the @expectedIncorrectUsage tag.
* E.g.: "@expectedIncorrectUsage Timber::get_posts()".
*
* @api
* @since 2.0.0
* @since WordPress 3.1.0
* @see \_doing_it_wrong()
*
* @param string $function The function that was called.
* @param string $message A message explaining what has been done incorrectly.
* @param string $version The version of Timber where the message was added.
*/
public static function doing_it_wrong($function, $message, $version)
{
/**
* Fires when the given function is being used incorrectly.
*
* @param string $function The function that was called.
* @param string $message A message explaining what has been done incorrectly.
* @param string $version The version of WordPress where the message was added.
*/
\do_action('doing_it_wrong_run', $function, $message, $version);
if (!WP_DEBUG) {
return;
}
/**
* Filters whether to trigger an error for _doing_it_wrong() calls.
*
* This filter is mainly used by unit tests.
*
* @since WordPress 3.1.0
* @since WordPress 5.1.0 Added the $function, $message and $version parameters.
*
* @param bool $trigger Whether to trigger the error for _doing_it_wrong() calls. Default true.
* @param string $function The function that was called.
* @param string $message A message explaining what has been done incorrectly.
* @param string $version The version of WordPress where the message was added.
*/
$should_trigger_error = \apply_filters(
'doing_it_wrong_trigger_error',
true,
$function,
$message,
$version
);
if ($should_trigger_error) {
if (\is_null($version)) {
$version = '';
} else {
$version = \sprintf(
'(This message was added in Timber version %s.)',
$version
);
}
$message .= \sprintf(
' Please see Debugging in WordPress (%1$s) as well as Debugging in Timber (%2$s) for more information.',
'https://wordpress.org/support/article/debugging-in-wordpress/',
'https://timber.github.io/docs/v2/guides/debugging/'
);
$error_message = \sprintf(
'%1$s was called <strong>incorrectly</strong>. %2$s %3$s',
$function,
$message,
$version
);
// phpcs:disable WordPress.PHP.DevelopmentFunctions.error_log_trigger_error
// phpcs:disable WordPress.Security.EscapeOutput.OutputNotEscaped
\trigger_error('[ Timber ] ' . $error_message);
}
}
/**
* Triggers a deprecation warning.
*
* If you want to catch errors like these in tests, then add the @expectedDeprecated tag to the
* DocBlock. E.g.: "@expectedDeprecated {{ TimberImage() }}".
*
* @api
* @see \_deprecated_function()
*
* @param string $function The name of the deprecated function/method.
* @param string $replacement The name of the function/method to use instead.
* @param string $version The version of Timber when the function was deprecated.
*
* @return void
*/
public static function deprecated($function, $replacement, $version)
{
/**
* Fires when a deprecated function is being used.
*
* @param string $function The function that was called.
* @param string $replacement The name of the function/method to use instead.
* @param string $version The version of Timber where the message was added.
*/
\do_action('deprecated_function_run', $function, $replacement, $version);
if (!WP_DEBUG) {
return;
}
/**
* Filters whether to trigger an error for deprecated functions.
*
* @since WordPress 2.5.0
*
* @param bool $trigger Whether to trigger the error for deprecated functions. Default true.
*/
if (!\apply_filters('deprecated_function_trigger_error', true)) {
return;
}
if (!\is_null($replacement)) {
$error_message = \sprintf(
'%1$s is deprecated since Timber version %2$s! Use %3$s instead.',
$function,
$version,
$replacement
);
} else {
$error_message = \sprintf(
'%1$s is deprecated since Timber version %2$s with no alternative available.',
$function,
$version
);
}
// phpcs:disable WordPress.PHP.DevelopmentFunctions.error_log_trigger_error
// phpcs:disable WordPress.Security.EscapeOutput.OutputNotEscaped
\trigger_error('[ Timber ] ' . $error_message);
}
/**
* @api
*
* @param string $separator
* @param string $seplocation
* @return string
*/
public static function get_wp_title($separator = ' ', $seplocation = 'left')
{
/**
* Filters the separator used for the page title.
*
* @since 2.0.0
*
* @param string $separator The separator to use. Default `' '`.
*/
$separator = \apply_filters('timber/helper/wp_title_separator', $separator);
/**
* Filters the separator used for the page title.
*
* @deprecated 2.0.0, use `timber/helper/wp_title_separator`
*/
$separator = \apply_filters_deprecated('timber_wp_title_seperator', [$separator], '2.0.0', 'timber/helper/wp_title_separator');
return \trim((string) \wp_title($separator, false, $seplocation));
}
/**
* Sorts object arrays by properties.
*
* @api
*
* @param array $array The array of objects to sort.
* @param string $prop The property to sort by.
*
* @return void
*/
public static function osort(&$array, $prop)
{
\usort($array, fn ($a, $b) => $a->$prop > $b->$prop ? 1 : -1);
}
/**
* @api
*
* @param array $arr
* @return bool
*/
public static function is_array_assoc($arr)
{
if (!\is_array($arr)) {
return false;
}
return (bool) \count(\array_filter(\array_keys($arr), 'is_string'));
}
/**
* @api
*
* @param array $array
* @return stdClass
*/
public static function array_to_object($array)
{
$obj = new stdClass();
foreach ($array as $k => $v) {
if (\is_array($v)) {
$obj->{$k} = self::array_to_object($v); //RECURSION
} else {
$obj->{$k} = $v;
}
}
return $obj;
}
/**
* @api
*
* @param array $array
* @param string $key
* @return bool|int
*/
public static function get_object_index_by_property($array, $key, mixed $value)
{
if (\is_array($array)) {
$i = 0;
foreach ($array as $arr) {
if (\is_array($arr)) {
if ($arr[$key] == $value) {
return $i;
}
} else {
if ($arr->$key == $value) {
return $i;
}
}
$i++;
}
}
return false;
}
/**
* @api
*
* @param array $array
* @param string $key
* @return array|null
* @throws Exception
*/
public static function get_object_by_property($array, $key, mixed $value)
{
if (\is_array($array)) {
foreach ($array as $arr) {
if ($arr->$key == $value) {
return $arr;
}
}
return false;
}
throw new InvalidArgumentException('$array is not an array, got:');
}
/**
* @api
*
* @param array $array
* @param int $len
* @return array
*/
public static function array_truncate($array, $len)
{
if (\sizeof($array) > $len) {
$array = \array_splice($array, 0, $len);
}
return $array;
}
/* Bool Utilities
======================== */
/**
* @api
*
* @return bool
*/
public static function is_true(mixed $value)
{
if (isset($value)) {
if (\is_string($value)) {
$value = \strtolower($value);
}
if (($value == 'true' || $value === 1 || $value === '1' || $value == true) && $value !== false && $value !== 'false') {
return true;
}
}
return false;
}
/**
* Is the number even? Let's find out.
*
* @api
*
* @param int $i number to test.
* @return bool
*/
public static function iseven($i)
{
return ($i % 2) === 0;
}
/**
* Is the number odd? Let's find out.
*
* @api
*
* @param int $i number to test.
* @return bool
*/
public static function isodd($i)
{
return ($i % 2) !== 0;
}
/**
* Plucks the values of a certain key from an array of objects
*
* @api
*
* @param array $array
* @param string $key
*
* @return array
*/
public static function pluck($array, $key)
{
$return = [];
foreach ($array as $obj) {
if (\is_object($obj) && \method_exists($obj, $key)) {
$return[] = $obj->$key();
} elseif (\is_object($obj) && \property_exists($obj, $key)) {
$return[] = $obj->$key;
} elseif (\is_array($obj) && isset($obj[$key])) {
$return[] = $obj[$key];
}
}
return $return;
}
/**
* Filters a list of objects, based on a set of key => value arguments.
* Uses WordPress WP_List_Util's filter.
*
* @api
* @since 1.5.3
* @ticket #1594
*
* @param array $list to filter.
* @param string|array $args to search for.
* @param string $operator to use (AND, NOT, OR).
* @return array
*/
public static function wp_list_filter($list, $args, $operator = 'AND')
{
if (!\is_array($args)) {
$args = [
'slug' => $args,
];
}
if (!\is_array($list) && !\is_a($list, 'Traversable')) {
return [];
}
$util = new WP_List_Util($list);
return $util->filter($args, $operator);
}
/**
* Converts a WP object (WP_Post, WP_Term) into its
* equivalent Timber class (Timber\Post, Timber\Term).
*
* If no match is found the function will return the initial argument.
*
* @api
* @param mixed $obj WP Object to convert
* @return mixed Instance of equivalent Timber object, or the argument if no match is found
*/
public static function convert_wp_object(mixed $obj)
{
if ($obj instanceof WP_Post) {
static $postFactory;
$postFactory = $postFactory ?: new PostFactory();
return $postFactory->from($obj->ID);
} elseif ($obj instanceof WP_Term) {
return Timber::get_term($obj->term_id);
} elseif ($obj instanceof WP_User) {
return Timber::get_user($obj->ID);
}
return $obj;
}
}