<?php

# This program is in the public domain within the United States. Additionally,
# we waive copyright and related rights in the work worldwide through the CC0
# 1.0 Universal public domain dedication, which can be found at
# http://creativecommons.org/publicdomain/zero/1.0/

require_once(__DIR__.'/'.'file.php');

function dwt_reset() {
	$GLOBALS['_dwt_keys'] = array('<!-- TemplateEndEditable -->');
	$GLOBALS['_dwt_values'] = array('');
}

function dwt_init() {
	if(isset($GLOBALS['_dwt_keys']) && isset($GLOBALS['_dwt_values'])) {
		return;
	}
	dwt_reset();
}

function dwt_load_str($str) {
	$GLOBALS['_dwt_template'] = $str;
	dwt_init();
}

function dwt_load($filename) {
	dwt_load_str(read_whole_file($filename));
}

function dwt_set_raw($name, $value) {
	$index = dwt_find_raw($name);
	if($index) {
		$GLOBALS['_dwt_keys'][$index] = $name;
		$GLOBALS['_dwt_values'][$index] = $value;
	} else {
		$GLOBALS['_dwt_keys'][] = $name;
		$GLOBALS['_dwt_values'][] = $value;
	}
}

function dwt_set($name, $value) {
	dwt_set_raw("<!-- TemplateBeginEditable name=\"$name\" -->", $value);
}

# returns index into arrays
function dwt_find_raw($name) {
	for($i = 0; $i < count($GLOBALS['_dwt_keys']); ++$i) {
		if($GLOBALS['_dwt_keys'][$i] == $name) {
			return $i;
		}
	}
	return null;
}

# returns index into arrays
function dwt_find($name) {
	return dwt_find_raw("<!-- TemplateBeginEditable name=\"$name\" -->");
}

function dwt_append_raw($name, $value) {
	$index = dwt_find_raw($name);
	if($index !== null) {
		$GLOBALS['_dwt_values'][$index] .= $value;
	} else {
		dwt_set_raw($name, $value);
	}
}

function dwt_append($name, $value) {
	dwt_append_raw("<!-- TemplateBeginEditable name=\"$name\" -->", $value);
}

function dwt_prepend_raw($name, $value) {
	$index = dwt_find_raw($name);
	if($index !== null) {
		$GLOBALS['_dwt_values'][$index] = $value . $GLOBALS['_dwt_values'][$index];
	} else {
		dwt_set_raw($name, $value);
	}
}

function dwt_prepend($name, $value) {
	dwt_prepend_raw("<!-- TemplateBeginEditable name=\"$name\" -->", $value);
}

function dwt_get_raw($name) {
	$index = dwt_find_raw($name);
	if($index !== null) {
		return $GLOBALS['_dwt_values'][$index];
	} else {
		return false;
	}
}

function dwt_get($name) {
	return dwt_get_raw("<!-- TemplateBeginEditable name=\"$name\" -->");
}

function dwt_output($filename = null) {
	if($filename !== null) {
		dwt_load($filename);
	}
	print(str_replace($GLOBALS['_dwt_keys'], $GLOBALS['_dwt_values'], $GLOBALS['_dwt_template']));
}