122 lines
3.5 KiB
PHP
122 lines
3.5 KiB
PHP
<?php
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namespace App\Classes\Parser;
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use Illuminate\Support\Facades\Log;
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use App\Classes\FrameFields;
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use App\Classes\Parser as AbstractParser;
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use App\Classes\Frame\Videotex as VideotexFrame;
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class Videotex extends AbstractParser
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{
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protected function parse($startline): string
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{
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// Our starting coordinates
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$output = '';
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$infield = FALSE; // In a field
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$fieldtype = NULL; // Type of field
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$fieldlength = 0; // Length of field
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// $fieldadrline = 1;
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// Scan the frame for a field start
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for ($y=$startline-1;$y<=VideotexFrame::$frame_length;$y++)
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{
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// Fields can only be on a single line
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$fieldx = $fieldy = FALSE;
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for ($x=0;$x<VideotexFrame::$frame_width;$x++)
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{
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$posn = $y*VideotexFrame::$frame_width+$x;
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// If the frame is not big enough, fill it with spaces.
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$byte = ord(isset($this->content{$posn}) ? $this->content{$posn} : ' ')%128;
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// Check for start-of-field
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if ($byte == ord(ESC)) { // Esc designates start of field (Esc-K is end of edit)
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$infield = TRUE;
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$fieldlength = 1;
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$fieldtype = ord(substr($this->content,$posn+1,1))%128;
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$output .= VideotexFrame::$if_filler;
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} else {
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if ($infield) {
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if ($byte == $fieldtype) {
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$fieldlength++;
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$byte = ord(VideotexFrame::$if_filler); // Replace field with VideotexFrame::$if_filler.
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if ($fieldx === FALSE) {
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$fieldx = $x;
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$fieldy = $y;
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}
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// Is this a magic field?
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if (array_get($this->fieldmap,chr($fieldtype)) ) {
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$field = $this->fieldmap[chr($fieldtype)];
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//dump(['infield','byte'=>$byte,'fieldtype'=>$fieldtype,'field'=>$field,'strpos'=>strpos($field,'#')]);
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/*
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// address field has many lines. increment when hit on first character.
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if ($fieldlength == 1 && strpos($field,'#') !== false) {
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$field = str_replace('#',$fieldadrline,$field);
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dump(['field'=>$field,'fieldadrline'=>$fieldadrline,'fieldadrline'=>$fieldadrline]);
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$fieldadrline++;
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}
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*/
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// Replace field with Date
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if ($field == '%date') {
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// Drop the last dot and replace it.
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if ($fieldlength == 2) {
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$datetime = date('D d M H:ia');
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$output = rtrim($output,VideotexFrame::$if_filler);
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$output .= $datetime{0};
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}
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if ($fieldlength > 1 AND $fieldlength <= strlen($datetime))
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$byte = ord($datetime{$fieldlength-1});
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}
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// @todo user data
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/* else if (isset($user[$field])) {
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if ($fieldlength <= strlen($user[$field])) {
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$byte = ord($user[$field]{$fieldlength-1});
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}
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} /*else // pre-load field contents. PAM or *00 ?
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if (isset($fields[what]['value'])) {
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*/
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}
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} else {
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$this->fields->push(new FrameFields([
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'type'=>chr($fieldtype),
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'length'=>$fieldlength,
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'x'=>$fieldx-1, // Adjust for the ESC char
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'y'=>$fieldy,
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]));
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Log::debug(sprintf('Frame Field found at [%s,%s], Type: %s, Length: %s',$fieldx-1,$fieldy,$fieldtype,$fieldlength));
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$infield = FALSE;
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$fieldx = $fieldy = FALSE;
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}
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}
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}
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// truncate end of lines @todo havent validated this code or used it?
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if (isset($pageflags['tru']) && substr($this->content,$posn,40-$x) === str_repeat(' ',40-$x)) {
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$output .= CR . LF;
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break;
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}
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if (! $infield OR $fieldlength > 1)
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$output .= ($byte < 32) ? ESC.chr($byte+64) : chr($byte);
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}
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}
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return $output;
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}
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} |