166 lines
2.9 KiB
PHP
166 lines
2.9 KiB
PHP
<?php
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namespace Edi;
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require_once (__DIR__.'/section.php');
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class SectionInfo
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{
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var $schema;
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var $parentInfo;
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var $section;
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}
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class Message
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{
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var $section;
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static function loadSchema ($schemaName)
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{
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$ediSchemaStr = file_get_contents (__DIR__."/$schemaName.json", TRUE);
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if ($ediSchemaStr !== FALSE)
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return json_decode ($ediSchemaStr, TRUE);
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return NULL;
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}
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static function isEdiString (&$string)
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{
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return substr ($string, 0, 4) == 'UNB+';
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}
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function parse (&$string, &$schema = NULL)
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{
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global $delimiters;
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if (!self::isEdiString ($string))
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throw new \Exception ('Not an EDI string.');
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$pos = 0;
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$error = FALSE;
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$endTag = NULL;
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$firstLoop = TRUE;
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$newSection = TRUE;
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$info = new SectionInfo ();
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$info->schema = $schema;
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$info->parentInfo = NULL;
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$info->section = NULL;
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$topInfo = $info;
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try {
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while (TRUE)
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{
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$segment = $this->parseSegment ($string, $pos);
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if (!$segment && (!$endTag || !$info))
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break;
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if (!$segment || ($segment && !$info))
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throw new \Exception ();
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if ($firstLoop)
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{
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if ($segment->name != $info->schema['mainTag'])
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throw new \Exception ();
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}
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else
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{
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for ($i = $info; $i; $i = $i->parentInfo)
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if (isset ($i->schema['childs'][$segment->name]))
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{
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$info = new SectionInfo ();
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$info->schema = $i->schema['childs'][$segment->name];
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$info->parentInfo = $i;
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$newSection = TRUE;
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break;
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}
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}
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if ($newSection)
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{
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$section = new Section ();
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$section->name = $segment->name;
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$info->section = $section;
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if ($info->parentInfo)
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{
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$section->parent = $info->parentInfo->section;
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$section->parent->childs[$segment->name][] = $section;
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}
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if (isset ($info->schema['endTag']))
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$endTag = $info;
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$newSection = FALSE;
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}
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if ($endTag && $endTag->schema['endTag'] == $segment->name)
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{
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$endTag->section->segments[] = $segment;
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$info = $endTag->parentInfo;
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for ($i = $info; $i; $i = $i->parentInfo)
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if (isset ($i->schema['endTag']))
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{
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$endTag = $i;
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break;
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}
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}
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else
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$info->section->segments[] = $segment;
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$firstLoop = FALSE;
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}}
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catch (\Exception $e)
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{
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throw new \Exception (sprintf ('Parse error, something is wrong near "%s"',
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substr ($string, $pos, 10)));
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}
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$this->section = $topInfo->section;
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}
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function parseSegment (&$string, &$pos)
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{
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$empty = TRUE;
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$values = [];
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while (TRUE)
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{
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if (!isset ($string{$pos}))
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return NULL;
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if (in_array ($string{$pos}, ['+', ':', '\'']))
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{
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if (!$empty)
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{
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$values[] =
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trim (substr ($string, $start, $pos - $start));
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$empty = TRUE;
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}
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}
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elseif ($empty)
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{
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$start = $pos;
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$empty = FALSE;
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}
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if ($string{$pos} === '\'')
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break;
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$pos++;
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}
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$pos++;
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$segment = new Segment ();
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$segment->name = $values[0];
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$segment->values = $values;
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return $segment;
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}
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}
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?>
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