Services/SimfileParser.php

   1 <?php
   2
   3 namespace Services;
   4
   5 use Services\ISimfileParser;
   6 use Exception;
   7
   8 class SimfileParser implements ISimfileParser
   9 {
  10
  11 //        'light' => 'Novice',
  12 //        'beginner' => 'Novice',
  13 //        'easy' => 'Easy',
  14 //        'medium' => 'Medium',
  15 //        'hard' => 'Hard',
  16 //        'challenge' => 'Expert',
  17 //        'edit' => 'Edit'
  18
  19     private $_smFileLines;
  20
  21     public function parse($simfileData)
  22     {
  23         $this->_smFileLines = explode(";", $simfileData);
  24     }
  25
  26     public function banner()
  27     {
  28         return $this->extractKey('BANNER') ?: null;
  29     }
  30
  31     public function title()
  32     {
  33         $title = $this->extractKey('TITLE');
  34         if(!$title) throw new Exception ('Invalid SM file. TITLE missing');
  35
  36         return $title;
  37     }
  38
  39     public function artist()
  40     {
  41         $artist = $this->extractKey('ARTIST');
  42         if(!$artist) throw new Exception ('Invalid SM file. ARTIST missing');
  43
  44         return new \Domain\VOs\StepMania\Artist($artist);
  45     }
  46
  47     public function stops()
  48     {
  49         $stops = $this->extractKey('STOPS');
  50         if($stops === false) throw new Exception ('Invalid SM file. STOPS missing');
  51
  52         return (bool)$stops;
  53     }
  54
  55     public function fgChanges()
  56     {
  57         $fgChanges = $this->extractKey('FGCHANGES');
  58         //XXX: Looks like fgChanges is allowed to be missing.
  59         //if($fgChanges === false) throw new Exception ('Invalid SM file. FGCHANGES missing');
  60
  61         return (bool)$fgChanges;
  62     }
  63
  64     public function bpm()
  65     {
  66         $displayBpm = $this->extractKey('DISPLAYBPM');
  67
  68         if($displayBpm)
  69         {
  70             $bpmRange = explode(":",$displayBpm);
  71             $bpmRange[1] = @$bpmRange[1] ?: $bpmRange[0];
  72         } else {
  73             $bpms = $this->extractKey('BPMS');
  74             $bpmRange = $this->parseBpms($bpms);
  75         }
  76
  77         //I have nfi why I made the BPM VO high-low instead of low-high in the constructor but yolo
  78         return new \Domain\VOs\StepMania\BPM($bpmRange[1], $bpmRange[0]);
  79     }
  80
  81     public function bgChanges()
  82     {
  83         $bgChanges = $this->extractKey('BGCHANGES');
  84         if($bgChanges === false) throw new Exception ('Invalid SM file. BGCHANGES missing');
  85
  86         return (bool)$bgChanges;
  87     }
  88
  89     public function bpmChanges()
  90     {
  91         $bpms = $this->extractKey('BPMS');
  92         if(!$bpms) throw new Exception ('Invalid SM file. BPMS missing');
  93
  94         $bpmRange = $this->parseBpms($bpms);
  95         //XXX: We have bpm changes when the high and low bpms are different.
  96         return $bpmRange[0] != $bpmRange[1];
  97     }
  98
  99     public function subtitle()
 100     {
 101         $subtitle = $this->extractKey('SUBTITLE');
 102         if(!$subtitle) throw new Exception ('Invalid SM file. SUBTITLE missing');
 103
 104         return $subtitle;
 105     }
 106
 107     function steps()
 108     {
 109         if(empty($this->_smFileLines)) throw new Exception('SM file data not set.');
 110         $allSteps = array();
 111
 112         foreach ($this->_smFileLines as $line)
 113         {
 114             $pos = strpos($line, '#NOTES:');
 115             if ($pos !== false)
 116             {
 117                 $noteData = trim(substr($line, $pos + 9));
 118                 $allSteps[] = $this->stepchartFromNoteData($noteData);
 119             }
 120         }
 121
 122         if(empty($allSteps)) throw new Exception('Invalid Sm file. NOTES missing');
 123         return $allSteps;
 124     }
 125
 126     private function stepchartFromNoteData($noteData)
 127     {
 128         $stepData = array_map('trim', explode(':', $noteData));
 129         return new \Domain\VOs\StepMania\StepChart(
 130             new \Domain\VOs\StepMania\DanceMode($stepData[0]),
 131             new \Domain\VOs\StepMania\Difficulty($stepData[2]),
 132             empty($stepData[1]) ? null : new \Domain\VOs\StepMania\StepArtist($stepData[1]),
 133             $stepData[3]
 134         );
 135     }
 136
 137     private function extractKey($key)
 138     {
 139         if(empty($this->_smFileLines)) throw new Exception('SM file data not set.');
 140
 141         foreach ($this->_smFileLines as $line)
 142         {
 143             $pos = strpos($line, '#' . $key . ':');
 144             if ($pos !== false) return trim(substr($line, $pos + strlen($key) + 2));
 145         }
 146
 147         return false;
 148     }
 149
 150     private function parseBpms($bpms)
 151     {
 152         $bpms = explode(",", $bpms);
 153         $bpmRange = array('high' => null, 'low' => null);
 154
 155         foreach($bpms as $bpm)
 156         {
 157                 $bpmMeasure = explode('=', $bpm);
 158                 $bpmValue = floatval($bpmMeasure[1]);
 159
 160                 if(empty($bpmRange['low'])) $bpmRange['low'] = $bpmRange['high'] = $bpmValue;
 161
 162                 $bpmRange['high'] = ($bpmValue > $bpmRange['high']) ? $bpmValue : $bpmRange['high'];
 163                 $bpmRange['low'] = ($bpmValue < $bpmRange['low']) ? $bpmValue : $bpmRange['low'];
 164         }
 165
 166         return array($bpmRange['low'], $bpmRange['high']);
 167     }
 168 }