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| 1 | <?php |
| 2 | /** |
| 3 | * Copyright (c) 2023 Johannes Stegmüller |
| 4 | * |
| 5 | * This file is a port of mhchemParser originally authored by Martin Hensel in javascript/typescript. |
| 6 | * The original license for this software can be found in the accompanying LICENSE.mhchemParser-ts.txt file. |
| 7 | */ |
| 8 | |
| 9 | namespace MediaWiki\Extension\Math\WikiTexVC\Mhchem; |
| 10 | |
| 11 | /** |
| 12 | * Some utility classes mostly for creating similar functionalities |
| 13 | * like in javascript in PHP. |
| 14 | * |
| 15 | * concatArray method here has the same functionality as concatArray (~l.194) |
| 16 | * in mhchemParser.js by Martin Hensel. |
| 17 | * |
| 18 | * @author Johannes Stegmüller |
| 19 | * @license GPL-2.0-or-later |
| 20 | */ |
| 21 | class MhchemUtil { |
| 22 | |
| 23 | /** |
| 24 | * The input is used as boolean operator in a javascript-type if condition, |
| 25 | * example: "if(input)" |
| 26 | * output has the same boolean results as an if-condition in javascript. |
| 27 | * arrays as input have to be used like this "issetJS($arr["b"] ?? null);" |
| 28 | * properties as input have to be used like this "issetJS($inst->prop ?? null);" |
| 29 | * @param mixed|null $input input to be checked in a javascript-type if condition |
| 30 | * @return bool indicator if input is populated |
| 31 | */ |
| 32 | public static function issetJS( $input ): bool { |
| 33 | if ( $input === 0 || $input == "" ) { |
| 34 | return false; |
| 35 | } |
| 36 | return true; |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Checks if the incoming string is containing a regex pattern. |
| 41 | * @param string $input string to verify |
| 42 | * @param string $subject subject to check, usually empty string |
| 43 | * @return bool true if regex pattern, false if not |
| 44 | */ |
| 45 | public static function isRegex( string $input, string $subject = "" ): bool { |
| 46 | /** |
| 47 | * Ignoring preg_match phpcs error here, since this is the fastest variant: 582 ms for MMLmhchemTestLocal, |
| 48 | * 835 ms for the try catch version of this, 735 ms for the version deactivating error handler |
| 49 | * during function call. |
| 50 | * See: https://stackoverflow.com/questions/16039362/how-can-i-suppress-phpcs-warnings-using-comments |
| 51 | */ |
| 52 | |
| 53 | // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged |
| 54 | return !( @preg_match( $input, $subject ) === false ); |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Checks if an array is an associative array |
| 59 | * @param array $array to check |
| 60 | * @return bool true if associative, otherwise false |
| 61 | */ |
| 62 | public static function isAssoc( array $array ): bool { |
| 63 | return ( $array !== array_values( $array ) ); |
| 64 | } |
| 65 | |
| 66 | public static function concatArray( &$a, $b ) { |
| 67 | if ( self::issetJS( $b ) ) { |
| 68 | if ( is_array( $b ) && ( self::isAssoc( $b ) ) ) { |
| 69 | $a[] = $b; |
| 70 | } elseif ( is_array( $b ) && !self::isAssoc( $b ) ) { |
| 71 | foreach ( $b as $value ) { |
| 72 | $a[] = $value; |
| 73 | } |
| 74 | } else { |
| 75 | $a[] = $b; |
| 76 | } |
| 77 | } |
| 78 | } |
| 79 | } |