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<?php
/*
* Copyright 2010-2011 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
/*%******************************************************************************************%*/
// CLASS
/**
* Contains a set of utility methods for connecting to, and working with, AWS.
*
* @version 2010.09.30
* @license See the included NOTICE.md file for more information.
* @copyright See the included NOTICE.md file for more information.
* @link http://aws.amazon.com/php/ PHP Developer Center
*/
class CFUtilities
{
/*%******************************************************************************************%*/
// CONSTANTS
/**
* Define the RFC 2616-compliant date format.
*/
const DATE_FORMAT_RFC2616 = 'D, d M Y H:i:s \G\M\T';
/**
* Define the ISO-8601-compliant date format.
*/
const DATE_FORMAT_ISO8601 = 'Y-m-d\TH:i:s\Z';
/**
* Define the MySQL-compliant date format.
*/
const DATE_FORMAT_MYSQL = 'Y-m-d H:i:s';
/*%******************************************************************************************%*/
// METHODS
/**
* Constructs a new instance of this class.
*
* @return $this A reference to the current instance.
*/
public function __construct()
{
return $this;
}
/**
* Retrieves the value of a class constant, while avoiding the `T_PAAMAYIM_NEKUDOTAYIM` error. Misspelled because `const` is a reserved word.
*
* @param object $class (Required) An instance of the class containing the constant.
* @param string $const (Required) The name of the constant to retrieve.
* @return mixed The value of the class constant.
*/
public function konst($class, $const)
{
if (is_string($class))
{
$ref = new ReflectionClass($class);
}
else
{
$ref = new ReflectionObject($class);
}
return $ref->getConstant($const);
}
/**
* Convert a HEX value to Base64.
*
* @param string $str (Required) Value to convert.
* @return string Base64-encoded string.
*/
public function hex_to_base64($str)
{
$raw = '';
for ($i = 0; $i < strlen($str); $i += 2)
{
$raw .= chr(hexdec(substr($str, $i, 2)));
}
return base64_encode($raw);
}
/**
* Convert an associative array into a query string.
*
* @param array $array (Required) Array to convert.
* @return string URL-friendly query string.
*/
public function to_query_string($array)
{
$temp = array();
foreach ($array as $key => $value)
{
if (is_string($key) && !is_array($value))
{
$temp[] = rawurlencode($key) . '=' . rawurlencode($value);
}
}
return implode('&', $temp);
}
/**
* Convert an associative array into a sign-able string.
*
* @param array $array (Required) Array to convert.
* @return string URL-friendly sign-able string.
*/
public function to_signable_string($array)
{
$t = array();
foreach ($array as $k => $v)
{
$t[] = $this->encode_signature2($k) . '=' . $this->encode_signature2($v);
}
return implode('&', $t);
}
/**
* Encode the value according to RFC 3986.
*
* @param string $string (Required) String to convert.
* @return string URL-friendly sign-able string.
*/
public function encode_signature2($string)
{
$string = rawurlencode($string);
return str_replace('%7E', '~', $string);
}
/**
* Convert a query string into an associative array. Multiple, identical keys will become an indexed array.
*
* @param string $qs (Required) Query string to convert.
* @return array Associative array of keys and values.
*/
public function query_to_array($qs)
{
$query = explode('&', $qs);
$data = array();
foreach ($query as $q)
{
$q = explode('=', $q);
if (isset($data[$q[0]]) && is_array($data[$q[0]]))
{
$data[$q[0]][] = urldecode($q[1]);
}
else if (isset($data[$q[0]]) && !is_array($data[$q[0]]))
{
$data[$q[0]] = array($data[$q[0]]);
$data[$q[0]][] = urldecode($q[1]);
}
else
{
$data[urldecode($q[0])] = urldecode($q[1]);
}
}
return $data;
}
/**
* Return human readable file sizes.
*
* @author Aidan Lister <aidan@php.net>
* @author Ryan Parman <ryan@getcloudfusion.com>
* @license http://www.php.net/license/3_01.txt PHP License
* @param integer $size (Required) Filesize in bytes.
* @param string $unit (Optional) The maximum unit to use. Defaults to the largest appropriate unit.
* @param string $default (Optional) The format for the return string. Defaults to `%01.2f %s`.
* @return string The human-readable file size.
* @link http://aidanlister.com/repos/v/function.size_readable.php Original Function
*/
public function size_readable($size, $unit = null, $default = null)
{
// Units
$sizes = array('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB');
$mod = 1024;
$ii = count($sizes) - 1;
// Max unit
$unit = array_search((string) $unit, $sizes);
if ($unit === null || $unit === false)
{
$unit = $ii;
}
// Return string
if ($default === null)
{
$default = '%01.2f %s';
}
// Loop
$i = 0;
while ($unit != $i && $size >= 1024 && $i < $ii)
{
$size /= $mod;
$i++;
}
return sprintf($default, $size, $sizes[$i]);
}
/**
* Convert a number of seconds into Hours:Minutes:Seconds.
*
* @param integer $seconds (Required) The number of seconds to convert.
* @return string The formatted time.
*/
public function time_hms($seconds)
{
$time = '';
// First pass
$hours = (int) ($seconds / 3600);
$seconds = $seconds % 3600;
$minutes = (int) ($seconds / 60);
$seconds = $seconds % 60;
// Cleanup
$time .= ($hours) ? $hours . ':' : '';
$time .= ($minutes < 10 && $hours > 0) ? '0' . $minutes : $minutes;
$time .= ':';
$time .= ($seconds < 10) ? '0' . $seconds : $seconds;
return $time;
}
/**
* Returns the first value that is set. Based on [Try.these()](http://api.prototypejs.org/language/Try/these/) from [Prototype](http://prototypejs.org).
*
* @param array $attrs (Required) The attributes to test, as strings. Intended for testing properties of the $base object, but also works with variables if you place an @ symbol at the beginning of the command.
* @param object $base (Optional) The base object to use, if any.
* @param mixed $default (Optional) What to return if there are no matches. Defaults to `null`.
* @return mixed Either a matching property of a given object, boolean `false`, or any other data type you might choose.
*/
public function try_these($attrs, $base = null, $default = null)
{
if ($base)
{
foreach ($attrs as $attr)
{
if (isset($base->$attr))
{
return $base->$attr;
}
}
}
else
{
foreach ($attrs as $attr)
{
if (isset($attr))
{
return $attr;
}
}
}
return $default;
}
/**
* Can be removed once all calls are updated.
*
* @deprecated Use <php:json_encode()> instead.
* @param mixed $obj (Required) The PHP object to convert into a JSON string.
* @return string A JSON string.
*/
public function json_encode($obj)
{
return json_encode($obj);
}
/**
* Converts a SimpleXML response to an array structure.
*
* @param ResponseCore $response (Required) A response value.
* @return array The response value as a standard, multi-dimensional array.
*/
public function convert_response_to_array(ResponseCore $response)
{
return json_decode(json_encode($response), true);
}
/**
* Checks to see if a date stamp is ISO-8601 formatted, and if not, makes it so.
*
* @param string $datestamp (Required) A date stamp, or a string that can be parsed into a date stamp.
* @return string An ISO-8601 formatted date stamp.
*/
public function convert_date_to_iso8601($datestamp)
{
if (!preg_match('/\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}((\+|-)\d{2}:\d{2}|Z)/m', $datestamp))
{
return gmdate(self::DATE_FORMAT_ISO8601, strtotime($datestamp));
}
return $datestamp;
}
/**
* Determines whether the data is Base64 encoded or not.
*
* @license http://us.php.net/manual/en/function.base64-decode.php#81425 PHP License
* @param string $s (Required) The string to test.
* @return boolean Whether the string is Base64 encoded or not.
*/
public function is_base64($s)
{
return (bool) preg_match('/^[a-zA-Z0-9\/\r\n+]*={0,2}$/', $s);
}
/**
* Determines whether the data is a JSON string or not.
*
* @param string $s (Required) The string to test.
* @return boolean Whether the string is a valid JSON object or not.
*/
public function is_json($s)
{
return !!(json_decode($s) instanceof stdClass);
}
/**
* Decodes `\uXXXX` entities into their real unicode character equivalents.
*
* @param string $s (Required) The string to decode.
* @return string The decoded string.
*/
public function decode_uhex($s)
{
preg_match_all('/\\\u([0-9a-f]{4})/i', $s, $matches);
$matches = $matches[count($matches) - 1];
$map = array();
foreach ($matches as $match)
{
if (!isset($map[$match]))
{
$map['\u' . $match] = html_entity_decode('&#' . hexdec($match) . ';', ENT_NOQUOTES, 'UTF-8');
}
}
return str_replace(array_keys($map), $map, $s);
}
/**
* Generates a random GUID.
*
* @author Alix Axel <http://www.php.net/manual/en/function.com-create-guid.php#99425>
* @license http://www.php.net/license/3_01.txt PHP License
* @return string A random GUID.
*/
public function generate_guid()
{
return sprintf(
'%04X%04X-%04X-%04X-%04X-%04X%04X%04X',
mt_rand(0, 65535),
mt_rand(0, 65535),
mt_rand(0, 65535),
mt_rand(16384, 20479),
mt_rand(32768, 49151),
mt_rand(0, 65535),
mt_rand(0, 65535),
mt_rand(0, 65535)
);
}
}
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