<?php
//Reference: http://wiki.mobileread.com/wiki/MOBI
class EXTHHelper{
static function typeToText($type){
$types = self::$types;
if(isset($types[$type])){
return $types[$type];
}
return $type;
}
static function textToType($text){
$text = strtolower($text);
if(isset(self::$flippedTypes[$text])){
return self::$flippedTypes[$text];
}
return false;
}
static function convert($n, $size){
$mask = 0xFF;
$out = "";
for($i = 0; $i < $size; $i++){
$out = chr(($n & $mask) >> (8*$i)).$out;
$mask = $mask << 8;
}
return $out;
}
static function getRightRepresentation($type, $value){
if($type >= 100 && $type < 200){
return $value;
}else{
return self::toHex($value);
}
}
static function toHex($value){
$out = "";
for($i = 0, $len = strlen($value); $i < $len; $i++){
if($i > 0) $out .= " ";
$hex = dechex(ord($value[$i]));
if(strlen($hex) < 2) $hex = "0".$hex;
$out .= $hex;
}
return $out;
}
static private $types = array(
1 => "drm server id",
2 => "drm commerce id",
3 => "drm ebookbase book id",
100 => "author",
101 => "publisher",
102 => "imprint",
103 => "description",
104 => "isbn",
105 => "subject",
106 => "publishingdate",
107 => "review",
108 => "contributor",
109 => "rights",
110 => "subjectcode",
111 => "type",
112 => "source",
113 => "asin",
114 => "versionnumber",
115 => "sample",
116 => "startreading",
118 => "retail price",
119 => "retail price currency",
201 => "coveroffset",
202 => "thumboffset",
203 => "hasfakecover",
204 => "Creator Software",
205 => "Creator Major Version",
206 => "Creator Minor Version",
207 => "Creator Build Number",
208 => "watermark",
209 => "tamper proof keys",
300 => "fontsignature",
401 => "clippinglimit",
402 => "publisherlimit",
403 => "403",
404 => "ttsflag",
501 => "cdetype",
502 => "lastupdatetime",
503 => "updatedtitle"
);
static private $flippedTypes = array(
"drm server id" => 1,
"drm commerce id" => 2,
"drm ebookbase book id" => 3,
"author" => 100,
"publisher" => 101,
"imprint" => 102,
"description" => 103,
"isbn" => 104,
"subject" => 105,
"publishingdate" => 106,
"review" => 107,
"contributor" => 108,
"rights" => 109,
"subjectcode" => 110,
"type" => 111,
"source" => 112,
"asin" => 113,
"versionnumber" => 114,
"sample" => 115,
"startreading" => 116,
"retail price" => 118,
"retail price currency" => 119,
"coveroffset" => 201,
"thumboffset" => 202,
"hasfakecover" => 203,
"Creator Software" => 204,
"Creator Major Version" => 205,
"Creator Minor Version" => 206,
"Creator Build Number" => 207,
"watermark" => 208,
"tamper proof keys" => 209,
"fontsignature" => 300,
"clippinglimit" => 401,
"publisherlimit" => 402,
"403" => 403,
"ttsflag" => 404,
"cdetype" => 501,
"lastupdatetime" => 502,
"updatedtitle" => 503
);
}
