441 lines
10 KiB
PHP
441 lines
10 KiB
PHP
<?php
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namespace App\Classes;
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use Illuminate\Support\Facades\Log;
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/**
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* Handles all aspects of frame
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*
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* Frame are constructed:
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* + First line is the header, displaying TITLE/CUG TITLE|PAGE #|COST
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* + Up to $frame_length for content
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* + Input/Status Line
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*
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* NOTES:
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* + Frames are stored in binary. ESC codes are stored as a single char < 32.
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* + Header is on line 1.
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* + Input field is on Line 24.
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* + 'i' Frames are info frames, no looking for fields. (Lines 2-23)
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* + 'a' Frames have active frames with responses.
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* + 't' Frames terminate the session
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*
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* + Frame types:
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* + 'ip' Frames are Information Provider frames - no header added. (Lines 1-23)
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*
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* To Consider
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* + 'x' External frames - living in another viewdata server
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*
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* @package App\Classes
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*/
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class Frame
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{
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private $frame = NULL;
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private $output = NULL;
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private $frame_length = 22;
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private $frame_width = 40;
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private $header_length = 20; // 20
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private $pagenum_length = 9; // 11 (prefixed with a color, suffixed with frame)
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private $cost_length = 7; // 9 (prefixed with a color, suffixed with unit)
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private $cost_unit = 'u';
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public $fields = NULL; // The fields in this frame.
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// Magic Fields that are pre-filled
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private $fieldmap = [
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'a'=>'address#',
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'd'=>'%date',
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];
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// Fields that are editable
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private $fieldoptions = [
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'a'=>['edit'=>TRUE], // Address
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'p'=>['edit'=>TRUE], // Password
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'u'=>['edit'=>TRUE], // User
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];
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// @todo Move this to the database
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private $header = RED.'T'.BLUE.'E'.GREEN.'S'.YELLOW.'T'.MAGENTA.'!';
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public function __construct(\App\Models\Frame $o,string $msg=NULL)
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{
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$this->frame = $o;
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$this->output = $this->hasFlag('clear') ? CLS : HOME;
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// If we have a message to display on the bottom line.
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if ($msg)
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$this->output .= UP.$msg.HOME;
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$startline = 0;
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if (! $this->hasFlag('ip')) {
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// Set the page header: CUG/Site Name | Page # | Cost
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$this->output .= $this->render_header($this->header).
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$this->render_page($this->frame->frame,$this->frame->index).
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$this->render_cost($this->frame->cost);
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$startline = 1;
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}
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// Calculate fields and render output.
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$this->fields($startline);
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}
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/**
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* Render the frame
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*
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* @return null|string
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*/
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public function __toString()
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{
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return $this->output;
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}
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/**
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* Return a list of alternative versions of this frame.
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*/
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public function alts()
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{
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return \App\Models\Frame::where('frame',$this->frame())
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->where('index',$this->index())
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->where('id','<>',$this->frame->id)
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->limit(9);
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}
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/**
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* Frame Created Date
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*/
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public function created()
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{
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return $this->frame->created_at;
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}
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/**
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* Convert the frame from Binary to Output
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* Look for fields within the frame.
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*
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* @param int $startline
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*/
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public function fields($startline=0,$fieldchar='.')
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{
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$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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$this->fields = collect(); // Fields in this frame.
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if ($startline)
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$this->output .= str_repeat(DOWN,$startline);
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// $fieldadrline = 1;
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// Scan the frame for a field start
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for ($y=$startline;$y<=$this->frame_length;$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;$x<$this->frame_width;$x++)
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{
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$posn = $y*40+$x;
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// If the frame is not big enough, fill it with spaces.
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$byte = ord(isset($this->frame->content{$posn}) ? $this->frame->content{$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($this->frame->content,$posn+1,1))%128;
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$this->output .= $fieldchar;
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} else {
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if ($infield) {
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if ($byte == $fieldtype) {
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$fieldlength++;
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$byte = ord($fieldchar); // Replace field with $fieldchar.
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if ($fieldx === FALSE) {
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$fieldx = $x;
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$fieldy = $y;
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}
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// Is this a magic field?
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// @todo For page redisplay *00, we should show entered contents - for refresh *09 we should show updated contents
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if (array_get($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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$this->output = rtrim($this->output,$fieldchar);
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$this->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: %s, Field found at [%s,%s], Type: %s, Length: %s',$this->page(),$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($this->frame->content,$posn,40-$x) === str_repeat(' ',40-$x)) {
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$this->output .= CR . LF;
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break;
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}
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if (! $infield OR $fieldlength > 1)
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$this->output .= ($byte < 32) ? ESC.chr($byte+64) : chr($byte);
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}
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}
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}
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/**
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* Returns the current frame.
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*/
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public function frame()
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{
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return $this->frame->frame;
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}
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/**
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* Return the current field configuration
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*/
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public function getField(int $id)
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{
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return $this->fields->get($id);
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}
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/**
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* Get a specific key of the field options that passes a filter test
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*
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* @param string $type
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* @param int $after
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* @return mixed
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*/
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public function getFieldId($type='edit',$after=0)
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{
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return $this->fields
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->search(function($item,$key) use ($type,$after) {
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return $key >= $after AND $this->isFieldEditable($item->type);
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});
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}
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/**
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* Return the flag for this page
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*
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* CLEAR: Clear Screen before rendering.
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*
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* @param $flag
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* @return bool
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*/
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public function hasFlag($flag)
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{
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return $this->frame->hasFlag($flag);
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}
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/**
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* Return the frame DB id
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*
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* @return mixed
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*/
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public function id()
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{
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return $this->frame->id;
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}
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/**
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* Current frame index
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*
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* @return mixed
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*/
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public function index()
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{
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return $this->frame->index;
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}
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/**
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* Return the next index
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*/
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public function index_next()
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{
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return chr(ord($this->frame->index)+1);
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}
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/**
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* Determine if a field is editable
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*
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* @param string $field
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* @return mixed
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*/
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public function isFieldEditable(string $field)
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{
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return array_get(array_get($this->fieldoptions,$field),'edit',FALSE);
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}
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/**
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* Return the Page Number
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*/
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public function page(bool $as_array=FALSE)
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{
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return $as_array ? ['frame'=>$this->frame->frame,'index'=>$this->frame->index] : $this->frame->page;
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}
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/**
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* Return the next page number.
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*
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* @param bool $as_array
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* @return mixed
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*/
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public function pagenext(bool $as_array=FALSE)
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{
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return $as_array ? ['frame'=>$this->frame->frame,'index'=>$this->index_next()] : $this->frame->frame.$this->index_next();
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}
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/**
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* Render the cost of the frame
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*
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* @param int $cost
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* @return string
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* @throws \Exception
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*/
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private function render_cost(int $cost)
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{
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if ($cost > 999)
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throw new \Exception('Price too high');
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if ($cost > 100)
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$color = RED;
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elseif ($cost > 0)
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$color = YELLOW;
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else
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$color = GREEN;
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return sprintf($color.'% '.$this->cost_length.'.0f%s',$cost,$this->cost_unit);
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}
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/**
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* Render the Site Header
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*
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* @param string $header
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* @return bool|string
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*/
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private function render_header(string $header)
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{
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$filler = ($this->strlenv($header) < $this->header_length) ? str_repeat(' ',$this->header_length-$this->strlenv($header)) : '';
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return substr($header.$filler,0,$this->header_length+substr_count($this->header,ESC));
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}
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/**
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* Render the Frame Number
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*
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* @param int $num
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* @param string $frame
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* @return string
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* @throws \Exception
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*/
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private function render_page(int $num,string $frame)
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{
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if ($num > 999999999)
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throw new \Exception('Page Number too big',500);
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if (strlen($frame) !== 1)
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throw new \Exception('Frame invalid',500);
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return sprintf(WHITE.'% '.$this->pagenum_length.'.0f%s',$num,$frame);
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}
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/**
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* Get the route for the key press
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*
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* @param string $read
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*/
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public function route(string $read)
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{
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// @todo
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return FALSE;
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}
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/**
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* Calculate the length of text
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*
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* ESC characters are two chars, and need to be counted as one.
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*
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* @param $text
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* @return int
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*/
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function strlenv($text):int {
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return strlen($text)-substr_count($text,ESC);
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}
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public static function testFrame()
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{
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// Simulate a DB load
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$o = new \App\Models\Frame;
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$o->content = '';
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$o->flags = ['ip'];
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$o->type = 'a';
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$o->frame = 999;
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$o->index = 'a';
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// Header
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$o->content .= substr(R_RED.'T'.R_BLUE.'E'.R_GREEN.'S'.R_YELLOW.'T-12345678901234567890',0,20).
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R_WHITE.'999999999a'.R_RED.sprintf('%07.0f',999).'u';
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$o->content .= str_repeat('+-',18).' '.R_RED.'01';
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$o->content .= 'Name: '.ESC.str_repeat('u',5).str_repeat('+-',14);
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$o->content .= 'Date: '.ESC.str_repeat('d',25).str_repeat('+-',4);
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$o->content .= 'Address: '.ESC.str_repeat('a',19).' '.str_repeat('+-',5);
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$o->content .= ' : '.ESC.str_repeat('a',19).' '.str_repeat('+-',5);
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return $o;
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}
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/**
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* Return the Frame Type
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*/
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public function type()
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{
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return $this->frame->type();
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}
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} |