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WrappedStringList.php
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WrappedStringList.php
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<?php
/**
* Copyright 2016 Timo Tijhof
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* @file
*/
namespace Wikimedia;
class WrappedStringList {
/** @var string */
protected $sep;
/** @var (string|WrappedString|WrappedStringList)[] */
protected $wraps;
/**
* @param string $sep
* @param (string|WrappedString|WrappedStringList)[] $wraps
*/
public function __construct( $sep, array $wraps ) {
$this->sep = $sep;
$this->wraps = $wraps;
}
/**
* @param (string|WrappedString|WrappedStringList)[] $wraps
* @return WrappedStringList Combined list
*/
protected function extend( array $wraps ) {
$list = clone $this;
$list->wraps = array_merge( $list->wraps, $wraps );
return $list;
}
/**
* Merge consecutive lists with the same separator.
*
* Does not modify the given array or any of the objects in it.
*
* @param (string|WrappedString|WrappedStringList)[] $lists
* @param string $outerSep Separator that the caller intends to use when joining the strings
* @return string[] Compacted list to be treated as strings
* (may contain WrappedString and WrappedStringList objects)
*/
protected static function compact( array $lists, $outerSep ) {
$consolidated = [];
foreach ( $lists as $list ) {
if ( !$list instanceof WrappedStringList ) {
// Probably WrappedString or regular string,
// Not mergable as a list, but may be merged as a string
// later by WrappedString::compact.
$consolidated[] = $list;
continue;
}
if ( $list->sep === $outerSep ) {
$consolidated = array_merge(
$consolidated,
self::compact( $list->wraps, $outerSep )
);
} else {
$consolidated[] = $list;
}
}
return WrappedString::compact( $consolidated );
}
/**
* Join a several wrapped strings with a separator between each.
*
* @param string $sep
* @param (string|WrappedString|WrappedStringList)[] $lists
* @return string
*/
public static function join( $sep, array $lists ) {
return implode( $sep, self::compact( $lists, $sep ) );
}
/** @return string */
public function __toString() {
return self::join( $this->sep, [ $this ] );
}
}

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WrappedStringList.php (3 KB)

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