Updated Videotex frame to use Parser

2018-12-29 23:24:41 +11:00
parent 35b5bc2263
commit 390f52a460
12 changed files with 200 additions and 140 deletions
--- a/app/Classes/Parser/Videotex.php
+++ b/app/Classes/Parser/Videotex.php
@@ -0,0 +1,122 @@
+<?php
+
+namespace App\Classes\Parser;
+
+use Illuminate\Support\Facades\Log;
+
+use App\Classes\FrameFields;
+use App\Classes\Parser as AbstractParser;
+use App\Classes\Frame\Videotex as VideotexFrame;
+
+class Videotex extends AbstractParser
+{
+	protected function parse($startline): string
+	{
+		// Our starting coordinates
+		$output = '';
+
+		$infield = FALSE;           // In a field
+		$fieldtype = NULL;          // Type of field
+		$fieldlength = 0;           // Length of field
+
+		// $fieldadrline = 1;
+
+		// Scan the frame for a field start
+		for ($y=$startline-1;$y<=VideotexFrame::$frame_length;$y++)
+		{
+			// Fields can only be on a single line
+			$fieldx = $fieldy = FALSE;
+
+			for ($x=0;$x<VideotexFrame::$frame_width;$x++)
+			{
+				$posn = $y*VideotexFrame::$frame_width+$x;
+
+				// If the frame is not big enough, fill it with spaces.
+				$byte = ord(isset($this->content{$posn}) ? $this->content{$posn} : ' ')%128;
+
+				// Check for start-of-field
+				if ($byte == ord(ESC)) {     // Esc designates start of field (Esc-K is end of edit)
+					$infield = TRUE;
+					$fieldlength = 1;
+					$fieldtype = ord(substr($this->content,$posn+1,1))%128;
+					$output .= VideotexFrame::$if_filler;
+
+				} else {
+					if ($infield) {
+						if ($byte == $fieldtype) {
+							$fieldlength++;
+							$byte = ord(VideotexFrame::$if_filler);	    // Replace field with VideotexFrame::$if_filler.
+
+							if ($fieldx === FALSE) {
+								$fieldx = $x;
+								$fieldy = $y;
+							}
+
+							// Is this a magic field?
+							if (array_get($this->fieldmap,chr($fieldtype)) ) {
+								$field = $this->fieldmap[chr($fieldtype)];
+								//dump(['infield','byte'=>$byte,'fieldtype'=>$fieldtype,'field'=>$field,'strpos'=>strpos($field,'#')]);
+
+								/*
+								// address field has many lines. increment when hit on first character.
+								if ($fieldlength == 1 && strpos($field,'#') !== false) {
+									$field = str_replace('#',$fieldadrline,$field);
+									dump(['field'=>$field,'fieldadrline'=>$fieldadrline,'fieldadrline'=>$fieldadrline]);
+									$fieldadrline++;
+								}
+								*/
+
+								// Replace field with Date
+								if ($field == '%date') {
+									// Drop the last dot and replace it.
+									if ($fieldlength == 2) {
+										$datetime = date('D d M H:ia');
+										$output = rtrim($output,VideotexFrame::$if_filler);
+										$output .= $datetime{0};
+									}
+
+									if ($fieldlength > 1 AND $fieldlength <= strlen($datetime))
+										$byte = ord($datetime{$fieldlength-1});
+								}
+
+								// @todo user data
+								/* else if (isset($user[$field])) {
+									if ($fieldlength <= strlen($user[$field])) {
+										$byte = ord($user[$field]{$fieldlength-1});
+									}
+								} /*else 	// pre-load field contents. PAM or *00 ?
+								if (isset($fields[what]['value'])) {
+
+								*/
+							}
+
+						} else {
+							$this->fields->push(new FrameFields([
+								'type'=>chr($fieldtype),
+								'length'=>$fieldlength,
+								'x'=>$fieldx-1,             // Adjust for the ESC char
+								'y'=>$fieldy,
+							]));
+
+							Log::debug(sprintf('Frame Field found at [%s,%s], Type: %s, Length: %s',$fieldx-1,$fieldy,$fieldtype,$fieldlength));
+
+							$infield = FALSE;
+							$fieldx = $fieldy = FALSE;
+						}
+					}
+				}
+
+				// truncate end of lines @todo havent validated this code or used it?
+				if (isset($pageflags['tru']) && substr($this->content,$posn,40-$x) === str_repeat(' ',40-$x)) {
+					$output .= CR . LF;
+					break;
+				}
+
+				if (! $infield OR $fieldlength > 1)
+					$output .= ($byte < 32) ? ESC.chr($byte+64) : chr($byte);
+			}
+		}
+
+		return $output;
+	}
+}