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| 1 | <?php |
| 2 | /* |
| 3 | Score, a MediaWiki extension for rendering musical scores with LilyPond. |
| 4 | Copyright © 2011 Alexander Klauer |
| 5 | |
| 6 | This program is free software: you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation, either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | |
| 19 | */ |
| 20 | |
| 21 | namespace MediaWiki\Extension\Score; |
| 22 | |
| 23 | /** |
| 24 | * Convert the std error output of lilypond into a concise html form. |
| 25 | */ |
| 26 | class LilypondErrorMessageBeautifier { |
| 27 | /** |
| 28 | * Lilyponds error reporting line regex, only the line with the error line, column and message. |
| 29 | */ |
| 30 | private const LILYPOND_ERR_REGEX = '/\.ly:(?<line>\d+):(?<column>\d+): error: (?<message>.+)$/m'; |
| 31 | |
| 32 | private const BEAUTIFIED_ERR_FORMAT = "line %d - column %d:\n%s"; |
| 33 | private const BEAUTIFIED_ERR_SEPARATOR = "\n--------\n"; |
| 34 | |
| 35 | /** |
| 36 | * @var int |
| 37 | * |
| 38 | * The line number where user's score input is inserted, within the final |
| 39 | * lilypond file that is passed to lilypond executable. |
| 40 | * |
| 41 | * The first line is assumed to start at the first column (no column offset). |
| 42 | */ |
| 43 | private $scoreFirstLineOffset; |
| 44 | |
| 45 | /** |
| 46 | * @param int $scoreFirstLineOffset |
| 47 | */ |
| 48 | public function __construct( $scoreFirstLineOffset = 0 ) { |
| 49 | $this->scoreFirstLineOffset = $scoreFirstLineOffset; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Beautifies lilypond executable error messages by: |
| 54 | * - adjusting line numbers fit the user's input |
| 55 | * - stripping out all echoed erroneous code |
| 56 | * - stripping out unnecessary keywords |
| 57 | * |
| 58 | * @param string $message |
| 59 | * |
| 60 | * @return string |
| 61 | */ |
| 62 | public function beautifyMessage( $message ) { |
| 63 | if ( !preg_match_all( |
| 64 | self::LILYPOND_ERR_REGEX, |
| 65 | $message, |
| 66 | $errorMatches, |
| 67 | PREG_SET_ORDER |
| 68 | ) ) { |
| 69 | return ''; |
| 70 | } |
| 71 | |
| 72 | $beautifiedMessages = []; |
| 73 | |
| 74 | foreach ( $errorMatches as $errorMatch ) { |
| 75 | $beautifiedMessages[] = $this->formatErrorMatchLine( $errorMatch ); |
| 76 | } |
| 77 | |
| 78 | return implode( self::BEAUTIFIED_ERR_SEPARATOR, $beautifiedMessages ); |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * @param array $errorMatch |
| 83 | * @return string |
| 84 | */ |
| 85 | private function formatErrorMatchLine( array $errorMatch ) { |
| 86 | return sprintf( |
| 87 | self::BEAUTIFIED_ERR_FORMAT, |
| 88 | intval( $errorMatch[ 'line' ] ) - $this->scoreFirstLineOffset, |
| 89 | intval( $errorMatch[ 'column' ] ), |
| 90 | $errorMatch[ 'message' ] |
| 91 | ); |
| 92 | } |
| 93 | } |