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<?php
namespace App\Http\Controllers;
use App\Song;
use Illuminate\Http\Request;
class SongController extends Controller
{
public function show( $songNumber )
{
$song = Song::where('number', $songNumber )->first();
$lines = explode( "\n", $song['text'] );
$newText = '';
foreach( $lines as $line ){
$line = htmlspecialchars( $line );
if ( $this->chordline( $line ) ) {
$transp = 0;
$class = "tabs chord$transp";
$line = str_replace(
array('{','}'),
array('</b>{', "}<b class='$class'>" ),
$line );
$newText .= "<b class='$class'>" . $line . "</b>\n";
} else {
$newText .= "$line\n";
}
}
$song['escapedText'] = $newText;
return view('song', ['song' => $song, 'transp' => 0 ] );
}
/**
* @brief Determine whether or not this line contains chords.
*/
private function chordline($line)
{
$chords =
array( "C","C#","D","D#","E","F","F#","G","G#","A#","B",//"A",
"Db", "Eb", "Gb", "Bb",//"Ab",
"Cm", "Dm", "Fm", "Gm", "Bm", //"Em", "Am",
);
$ambiguous = array( "Ab", "Em", "Am", "A" );
$line = str_replace(array('/','7', "\n", '2', '4'), ' ', $line);
$tokens = array_filter(explode(' ', $line));
$badtokens = 0;
$ambtokens = 0;
$goodtokens = 0;
foreach ($tokens as $token) {
if( in_array( substr($token, 0,2), $chords ) ) $goodtokens++;
else if ( in_array( substr( $token, 0,2), $ambiguous) ) $ambtokens++;
else if( $badtokens > 10 ) return FALSE;
else $badtokens++;
}
return ($goodtokens *2)+ $ambtokens >= $badtokens;
}
}
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