Rewrite adding support for namespacing, UTMV cookie and unit testings.

README.md

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+Installation:
+
+Clone this repository, and include autoload.php.  If you are using another 
+autoloader, simply point it to the GoogleAnalytics namespace in the "src"
+directory.
+
+Usage:
+
+The Google Analytics UTM Variables typycally available as cookies.  If you are tracking accross domains (using _getLinkerUrl()), these parameters will initially be available via the HTTP_REFERER query string.
+
+This library is currently able to process the following cookies:
+
+__utma - Expires 2 years after set/update.  Stores Domain Hash, Visitor ID and a series of timestamps.
+__utmb - Expires 30 mins from set/update.  This is used to determine session expiration.
+__utmc - Expires at the end of browser session.  Deprecated.
+__utmv - Expires 2 years from set/update.  Stores Custom Variables.
+__utmz - Expires 6 months from set/update.  Stores campaign attribution information.
+
+```php
+    <?php
+
+    $tracker = new \GoogleAnalytics\CampaignTracking\Tracker($_COOKIE);
+
+    echo $tracker->getCampaignMedium() . "\n";
+    echo $tracker->getCampaignSource() . "\n";
+```
+
+Wish List:
+
+1)  First and foremost, the regular expressions used in the "validate" methods 
+need to be improved upon.
+
+2)  I would like to implement ArrayAcces, Serializable and JsonSerializable. 
+One thing that will have to be decided is how to handle the timestamps.  
+All the timestamps are currently transformed into DateTime objects.  For 
+ArrayAccess, we could return a string or the DateTime object.  For the 
+serializing interfaces, we will certainly want a string, but a decision 
+will have to be made as to what format (ie. UNIX Timestamp, ISO8601, etc).
+So...
+   2a)  Implement ArrayAccess for Tracker, CustomVar and Utm classes.
+   2b)  Implement Serializable for Tracker, CustomVar and Utm classes.
+   2c)  Implement JsonSerializable for Tracker, CustomVar and Utm classes.
+
+3)  Implement some sort of toArray() functionality for the whole model.

autoload.php

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+<?php
+
+if(!class_exists('SplClassLoader'))
+    require __DIR__.'/lib/SplClassLoader.php';
+
+$_classLoader = new \SplClassLoader('GoogleAnalytics', __DIR__.'/src');
+$_classLoader->register();

composer.json

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+{
+    "name": "RogerWebb/Google-Analytics-PHP-cookie-parser"
+}

lib/SplClassLoader.php

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+<?php
+
+/**
+ * SplClassLoader implementation that implements the technical interoperability
+ * standards for PHP 5.3 namespaces and class names.
+ *
+ * http://groups.google.com/group/php-standards/web/final-proposal
+ *
+ *     // Example which loads classes for the Doctrine Common package in the
+ *     // Doctrine\Common namespace.
+ *     $classLoader = new SplClassLoader('Doctrine\Common', '/path/to/doctrine');
+ *     $classLoader->register();
+ *
+ * @author Jonathan H. Wage <[email protected]>
+ * @author Roman S. Borschel <[email protected]>
+ * @author Matthew Weier O'Phinney <[email protected]>
+ * @author Kris Wallsmith <[email protected]>
+ * @author Fabien Potencier <[email protected]>
+ */
+class SplClassLoader
+{
+    private $_fileExtension = '.php';
+    private $_namespace;
+    private $_includePath;
+    private $_namespaceSeparator = '\\';
+
+    /**
+     * Creates a new <tt>SplClassLoader</tt> that loads classes of the
+     * specified namespace.
+     * 
+     * @param string $ns The namespace to use.
+     */
+    public function __construct($ns = null, $includePath = null)
+    {
+        $this->_namespace = $ns;
+        $this->_includePath = $includePath;
+    }
+
+    /**
+     * Sets the namespace separator used by classes in the namespace of this class loader.
+     * 
+     * @param string $sep The separator to use.
+     */
+    public function setNamespaceSeparator($sep)
+    {
+        $this->_namespaceSeparator = $sep;
+    }
+
+    /**
+     * Gets the namespace seperator used by classes in the namespace of this class loader.
+     *
+     * @return void
+     */
+    public function getNamespaceSeparator()
+    {
+        return $this->_namespaceSeparator;
+    }
+
+    /**
+     * Sets the base include path for all class files in the namespace of this class loader.
+     * 
+     * @param string $includePath
+     */
+    public function setIncludePath($includePath)
+    {
+        $this->_includePath = $includePath;
+    }
+
+    /**
+     * Gets the base include path for all class files in the namespace of this class loader.
+     *
+     * @return string $includePath
+     */
+    public function getIncludePath()
+    {
+        return $this->_includePath;
+    }
+
+    /**
+     * Sets the file extension of class files in the namespace of this class loader.
+     * 
+     * @param string $fileExtension
+     */
+    public function setFileExtension($fileExtension)
+    {
+        $this->_fileExtension = $fileExtension;
+    }
+
+    /**
+     * Gets the file extension of class files in the namespace of this class loader.
+     *
+     * @return string $fileExtension
+     */
+    public function getFileExtension()
+    {
+        return $this->_fileExtension;
+    }
+
+    /**
+     * Installs this class loader on the SPL autoload stack.
+     */
+    public function register()
+    {
+        spl_autoload_register(array($this, 'loadClass'));
+    }
+
+    /**
+     * Uninstalls this class loader from the SPL autoloader stack.
+     */
+    public function unregister()
+    {
+        spl_autoload_unregister(array($this, 'loadClass'));
+    }
+
+    /**
+     * Loads the given class or interface.
+     *
+     * @param string $className The name of the class to load.
+     * @return void
+     */
+    public function loadClass($className)
+    {
+        if (null === $this->_namespace || $this->_namespace.$this->_namespaceSeparator === substr($className, 0, strlen($this->_namespace.$this->_namespaceSeparator))) {
+            $fileName = '';
+            $namespace = '';
+            if (false !== ($lastNsPos = strripos($className, $this->_namespaceSeparator))) {
+                $namespace = substr($className, 0, $lastNsPos);
+                $className = substr($className, $lastNsPos + 1);
+                $fileName = str_replace($this->_namespaceSeparator, DIRECTORY_SEPARATOR, $namespace) . DIRECTORY_SEPARATOR;
+            }
+            $fileName .= str_replace('_', DIRECTORY_SEPARATOR, $className) . $this->_fileExtension;
+
+            require ($this->_includePath !== null ? $this->_includePath . DIRECTORY_SEPARATOR : '') . $fileName;
+        }
+    }
+}

phpunit.xml

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+<phpunit bootstrap="autoload.php">
+ <testsuites>
+  <testsuite name="GoogleAnalytics">
+   <directory>tests</directory>
+  </testsuite>
+ </testsuites>
+</phpunit>