mirror of
https://github.com/ezyang/htmlpurifier.git
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106 lines
3.0 KiB
PHP
106 lines
3.0 KiB
PHP
<?php
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/**
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* Parses string hash files. File format is as such:
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*
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* DefaultKeyValue
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* KEY: Value
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* KEY2: Value2
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* --MULTILINE-KEY--
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* Multiline
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* value.
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*
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* Which would output something similar to:
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*
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* array(
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* 'ID' => 'DefaultKeyValue',
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* 'KEY' => 'Value',
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* 'KEY2' => 'Value2',
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* 'MULTILINE-KEY' => "Multiline\nvalue.\n",
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* )
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*
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* We use this as an easy to use file-format for configuration schema
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* files, but the class itself is usage agnostic.
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*
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* You can use ---- to forcibly terminate parsing of a single string-hash;
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* this marker is used in multi string-hashes to delimit boundaries.
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*/
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class HTMLPurifier_StringHashParser
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{
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public $default = 'ID';
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/**
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* Parses a file that contains a single string-hash.
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*/
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public function parseFile($file) {
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if (!file_exists($file)) return false;
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$fh = fopen($file, 'r');
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if (!$fh) return false;
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$ret = $this->parseHandle($fh);
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fclose($fh);
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return $ret;
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}
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/**
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* Parses a file that contains multiple string-hashes delimited by '----'
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*/
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public function parseMultiFile($file) {
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if (!file_exists($file)) return false;
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$ret = array();
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$fh = fopen($file, 'r');
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if (!$fh) return false;
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while (!feof($fh)) {
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$ret[] = $this->parseHandle($fh);
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}
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fclose($fh);
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return $ret;
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}
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/**
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* Internal parser that acepts a file handle.
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* @note While it's possible to simulate in-memory parsing by using
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* custom stream wrappers, if such a use-case arises we should
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* factor out the file handle into its own class.
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* @param $fh File handle with pointer at start of valid string-hash
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* block.
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*/
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protected function parseHandle($fh) {
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$state = false;
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$single = false;
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$ret = array();
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do {
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$line = fgets($fh);
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if ($line === false) break;
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$line = rtrim($line, "\n\r");
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if (!$state && $line === '') continue;
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if ($line === '----') break;
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if (strncmp('--', $line, 2) === 0) {
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// Multiline declaration
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$state = trim($line, '- ');
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if (!isset($ret[$state])) $ret[$state] = '';
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continue;
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} elseif (!$state) {
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$single = true;
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if (strpos($line, ':') !== false) {
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// Single-line declaration
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list($state, $line) = explode(':', $line, 2);
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$line = trim($line);
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} else {
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// Use default declaration
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$state = $this->default;
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}
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}
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if ($single) {
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$ret[$state] = $line;
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$single = false;
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$state = false;
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} else {
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$ret[$state] .= "$line\n";
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}
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} while (!feof($fh));
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return $ret;
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}
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}
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