Facebook login implemented

website/queries/Facebook/Url/FacebookUrlManipulator.php

@@ -0,0 +1,167 @@
+<?php
+/**
+ * Copyright 2014 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 $newParams = [])
+    {
+        if (!$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);
+    }
+}