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<?php
/**
* Copyright 2017 Facebook, Inc.
*
* You are hereby granted a non-exclusive, worldwide, royalty-free license to
* use, copy, modify, and distribute this software in source code or binary
* form for use in connection with the web services and APIs provided by
* Facebook.
*
* As with any software that integrates with the Facebook platform, your use
* of this software is subject to the Facebook Developer Principles and
* Policies [http://developers.facebook.com/policy/]. This copyright notice
* shall be included in all copies or substantial portions of the software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
namespace Facebook\Url;
/**
* Class FacebookUrlManipulator
*
* @package Facebook
*/
class FacebookUrlManipulator
{
/**
* Remove params from a URL.
*
* @param string $url The URL to filter.
* @param array $paramsToFilter The params to filter from the URL.
*
* @return string The URL with the params removed.
*/
public static function removeParamsFromUrl($url, array $paramsToFilter)
{
$parts = parse_url($url);
$query = '';
if (isset($parts['query'])) {
$params = [];
parse_str($parts['query'], $params);
// Remove query params
foreach ($paramsToFilter as $paramName) {
unset($params[$paramName]);
}
if (count($params) > 0) {
$query = '?' . http_build_query($params, null, '&');
}
}
$scheme = isset($parts['scheme']) ? $parts['scheme'] . '://' : '';
$host = isset($parts['host']) ? $parts['host'] : '';
$port = isset($parts['port']) ? ':' . $parts['port'] : '';
$path = isset($parts['path']) ? $parts['path'] : '';
$fragment = isset($parts['fragment']) ? '#' . $parts['fragment'] : '';
return $scheme . $host . $port . $path . $query . $fragment;
}
/**
* Gracefully appends params to the URL.
*
* @param string $url The URL that will receive the params.
* @param array $newParams The params to append to the URL.
*
* @return string
*/
public static function appendParamsToUrl($url, array $newParams = [])
{
if (empty($newParams)) {
return $url;
}
if (strpos($url, '?') === false) {
return $url . '?' . http_build_query($newParams, null, '&');
}
list($path, $query) = explode('?', $url, 2);
$existingParams = [];
parse_str($query, $existingParams);
// Favor params from the original URL over $newParams
$newParams = array_merge($newParams, $existingParams);
// Sort for a predicable order
ksort($newParams);
return $path . '?' . http_build_query($newParams, null, '&');
}
/**
* Returns the params from a URL in the form of an array.
*
* @param string $url The URL to parse the params from.
*
* @return array
*/
public static function getParamsAsArray($url)
{
$query = parse_url($url, PHP_URL_QUERY);
if (!$query) {
return [];
}
$params = [];
parse_str($query, $params);
return $params;
}
/**
* Adds the params of the first URL to the second URL.
*
* Any params that already exist in the second URL will go untouched.
*
* @param string $urlToStealFrom The URL harvest the params from.
* @param string $urlToAddTo The URL that will receive the new params.
*
* @return string The $urlToAddTo with any new params from $urlToStealFrom.
*/
public static function mergeUrlParams($urlToStealFrom, $urlToAddTo)
{
$newParams = static::getParamsAsArray($urlToStealFrom);
// Nothing new to add, return as-is
if (!$newParams) {
return $urlToAddTo;
}
return static::appendParamsToUrl($urlToAddTo, $newParams);
}
/**
* Check for a "/" prefix and prepend it if not exists.
*
* @param string|null $string
*
* @return string|null
*/
public static function forceSlashPrefix($string)
{
if (!$string) {
return $string;
}
return strpos($string, '/') === 0 ? $string : '/' . $string;
}
/**
* Trims off the hostname and Graph version from a URL.
*
* @param string $urlToTrim The URL the needs the surgery.
*
* @return string The $urlToTrim with the hostname and Graph version removed.
*/
public static function baseGraphUrlEndpoint($urlToTrim)
{
return '/' . preg_replace('/^https:\/\/.+\.facebook\.com(\/v.+?)?\//', '', $urlToTrim);
}
}
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