add user ip override and user agent override plugins

src/Moriony/Google/Analytics/MeasurementProtocol/Plugin/UserAgentOverrider.php

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+<?php
+
+namespace Moriony\Google\Analytics\MeasurementProtocol\Plugin;
+
+use Krizon\Google\Analytics\MeasurementProtocol\MeasurementProtocolClient;
+use Moriony\Google\Analytics\MeasurementProtocol\Hit\HitInterface;
+
+class UserAgentOverrider implements PluginInterface
+{
+    /**
+     * @param MeasurementProtocolClient $client
+     */
+    public function register($client)
+    {
+        $client->getEventDispatcher()->addListener('command.before_prepare', function ($e) {
+            /** @var \Guzzle\Service\Command\OperationCommand $command */
+            $command = $e['command'];
+            if (!isset($_SERVER['HTTP_USER_AGENT'])) {
+                return;
+            }
+            if ($command->hasKey(HitInterface::FIELD_USER_AGENT)) {
+                return;
+            }
+            $command->set(HitInterface::FIELD_USER_AGENT, $_SERVER['HTTP_USER_AGENT']);
+        });
+    }
+}

src/Moriony/Google/Analytics/MeasurementProtocol/Plugin/UserIpOverrider.php

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+<?php
+
+namespace Moriony\Google\Analytics\MeasurementProtocol\Plugin;
+
+use Krizon\Google\Analytics\MeasurementProtocol\MeasurementProtocolClient;
+use Moriony\Google\Analytics\MeasurementProtocol\Hit\HitInterface;
+
+class UserIpOverrider implements PluginInterface
+{
+    /**
+     * @param MeasurementProtocolClient $client
+     */
+    public function register($client)
+    {
+        $client->getEventDispatcher()->addListener('command.before_prepare', function ($e) {
+            /** @var \Guzzle\Service\Command\OperationCommand $command */
+            $command = $e['command'];
+            if (!isset($_SERVER['REMOTE_ADDR'])) {
+                return;
+            }
+            if ($command->hasKey(HitInterface::FIELD_USER_IP)) {
+                return;
+            }
+            $command->set(HitInterface::FIELD_USER_IP, $_SERVER['REMOTE_ADDR']);
+        });
+    }
+}

tests/Moriony/Google/Analytics/MeasurementProtocol/Plugin/UserAgentOverriderTest.php

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+<?php
+
+namespace Moriony\Google\Analytics\MeasurementProtocol\Plugin;
+
+use Guzzle\Tests\GuzzleTestCase;
+use Krizon\Google\Analytics\MeasurementProtocol\MeasurementProtocolClient;
+use Guzzle\Service\Command\OperationCommand;
+use Guzzle\Common\Event;
+
+class UserAgentOverriderTest extends GuzzleTestCase
+{
+    public function setUp()
+    {
+        $_SERVER['HTTP_USER_AGENT'] = null;
+    }
+
+    public function testSuccessfulUserAgentOverride()
+    {
+        $_SERVER['HTTP_USER_AGENT'] = 'Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.14';
+        $command = new OperationCommand();
+        $this->dispatchCommand($command);
+        $this->assertSame('Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.14', $command->get('ua'));
+    }
+
+    public function testEmptyUserAgentOverride()
+    {
+        $command = new OperationCommand();
+        $this->dispatchCommand($command);
+        $this->assertSame(null, $command->get('ua'));
+    }
+
+    public function testAlreadyOverriddenUserAgent()
+    {
+        $_SERVER['HTTP_USER_AGENT'] = 'Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.14';
+        $command = new OperationCommand();
+        $command->set('ua', 'some_value');
+        $this->dispatchCommand($command);
+        $this->assertSame('some_value', $command->get('ua'));
+    }
+
+    protected function dispatchCommand(OperationCommand $command)
+    {
+        $client = MeasurementProtocolClient::factory();
+        $plugin = new UserAgentOverrider();
+        $event = new Event(array('command' => $command));
+        $plugin->register($client);
+        $client->getEventDispatcher()->dispatch('command.before_prepare', $event);
+    }
+
+    public function tearDown()
+    {
+        $_SERVER['HTTP_USER_AGENT'] = null;
+    }
+}

tests/Moriony/Google/Analytics/MeasurementProtocol/Plugin/UserIpOverriderTest.php

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+<?php
+
+namespace Moriony\Google\Analytics\MeasurementProtocol\Plugin;
+
+use Guzzle\Tests\GuzzleTestCase;
+use Krizon\Google\Analytics\MeasurementProtocol\MeasurementProtocolClient;
+use Guzzle\Service\Command\OperationCommand;
+use Guzzle\Common\Event;
+
+class UserIpOverriderTest extends GuzzleTestCase
+{
+    public function setUp()
+    {
+        $_SERVER['REMOTE_ADDR'] = null;
+    }
+
+    public function testSuccessfulUserAgentOverride()
+    {
+        $_SERVER['REMOTE_ADDR'] = '1.2.3.4';
+        $command = new OperationCommand();
+        $this->dispatchCommand($command);
+        $this->assertSame('1.2.3.4', $command->get('uip'));
+    }
+
+    public function testEmptyUserAgentOverride()
+    {
+        $command = new OperationCommand();
+        $this->dispatchCommand($command);
+        $this->assertSame(null, $command->get('uip'));
+    }
+
+    public function testAlreadyOverriddenUserAgent()
+    {
+        $_SERVER['REMOTE_ADDR'] = '1.2.3.4';
+        $command = new OperationCommand();
+        $command->set('uip', '4.3.2.1');
+        $this->dispatchCommand($command);
+        $this->assertSame('4.3.2.1', $command->get('uip'));
+    }
+
+    protected function dispatchCommand(OperationCommand $command)
+    {
+        $client = MeasurementProtocolClient::factory();
+        $plugin = new UserIpOverrider();
+        $event = new Event(array('command' => $command));
+        $plugin->register($client);
+        $client->getEventDispatcher()->dispatch('command.before_prepare', $event);
+    }
+
+    public function tearDown()
+    {
+        $_SERVER['REMOTE_ADDR'] = null;
+    }
+}