From 1f43db3a0c2446fb886b855134634a77d296c95e Mon Sep 17 00:00:00 2001
From: Colin Richardson <colinrichardson@bigfork.co.uk>
Date: Wed, 22 May 2019 16:04:24 +0100
Subject: [PATCH] initial commmit

---
 README.md                             |  8 ++++++
 _config/config.yml                    |  9 +++++++
 code/GoogleConfig.php                 | 39 +++++++++++++++++++++++++++
 code/GoogleLogger.php                 | 30 +++++++++++++++++++++
 composer.json                         | 17 ++++++++++++
 templates/GoogleAnalyticsJSSnippet.ss |  8 ++++++
 6 files changed, 111 insertions(+)
 create mode 100644 README.md
 create mode 100644 _config/config.yml
 create mode 100644 code/GoogleConfig.php
 create mode 100644 code/GoogleLogger.php
 create mode 100644 composer.json
 create mode 100644 templates/GoogleAnalyticsJSSnippet.ss

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..59e089e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,8 @@
+# Bigfork Google Analytics
+
+Slimline module for configuring Google Analytics via SilverStripe CMS. Designed for use by [Bigfork]('http://www.bigfork.co.uk') - feel free to use/modify it.
+
+##Installation:
+```composer require bigfork/bfgoogleanalytics ^3.0```
+
+Add tracking code details via "Settings" menu.
diff --git a/_config/config.yml b/_config/config.yml
new file mode 100644
index 0000000..6b7e7b5
--- /dev/null
+++ b/_config/config.yml
@@ -0,0 +1,9 @@
+---
+Name: 'google-analytics'
+---
+SilverStripe\SiteConfig\SiteConfig:
+  extensions:
+    - BigforkGoogleAnalytics\GoogleConfig
+SilverStripe\CMS\Controllers\ContentController:
+  extensions:
+    - BigforkGoogleAnalytics\GoogleLogger
diff --git a/code/GoogleConfig.php b/code/GoogleConfig.php
new file mode 100644
index 0000000..f97c67a
--- /dev/null
+++ b/code/GoogleConfig.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace BigforkGoogleAnalytics;
+
+use SilverStripe\Forms\FieldList;
+use SilverStripe\Forms\LiteralField;
+use SilverStripe\Forms\Tab;
+use SilverStripe\Forms\TextField;
+use SilverStripe\Forms\TextareaField;
+use SilverStripe\ORM\DataExtension;
+
+class GoogleConfig extends DataExtension
+{
+    private static $db = [
+        'GoogleAnalyticsTrackingID' => 'Varchar',
+        'GoogleAnalyticsParameters' => 'Text',
+        'GoogleAnalyticsConstructorParameters' => 'Text'
+    ];
+
+    /**
+     * @inheritdoc
+     */
+    public function updateCMSFields(FieldList $fields)
+    {
+        $analyticsFields = FieldList::create(
+            LiteralField::create('', '<div class="message warning">Tracking will be output using gtag.js</div>'),
+            TextField::create("GoogleAnalyticsTrackingID", "Google Analytics Tracking ID")
+                ->setDescription("e.g. UA-XXXXXX-X"),
+            TextareaField::create("GoogleAnalyticsConstructorParameters", "Additional Configuration")
+                ->setDescription("<strong>Advanced users only.</strong>
+					An object to be passed as an argument to gtag config. If you do not know what this field does, please leave it blank. "),
+            TextareaField::create("GoogleAnalyticsParameters", "Additional Google Analytics Properties")
+                ->setDescription("<strong>Advanced users only.</strong>
+					 Insert additional code after the initial gtag config. If you do not know what this does, please leave this field blank.")
+        );
+
+        $fields->addFieldToTab('Root', Tab::create('GoogleAnalytics')->setChildren($analyticsFields));
+    }
+}
diff --git a/code/GoogleLogger.php b/code/GoogleLogger.php
new file mode 100644
index 0000000..d4cf7a0
--- /dev/null
+++ b/code/GoogleLogger.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace BigforkGoogleAnalytics;
+
+use SilverStripe\Core\Extension;
+use SilverStripe\SiteConfig\SiteConfig;
+use SilverStripe\View\ArrayData;
+use SilverStripe\View\Requirements;
+
+class GoogleLogger extends Extension
+{
+    public function onAfterInit()
+    {
+        if ($this->owner->getRequest()->getVar('CMSPreview')) {
+            return;
+        }
+
+        $config = SiteConfig::current_site_config();
+
+        // include the JS snippet into the frontend page markup
+        if ($trackingID = $config->GoogleAnalyticsTrackingID) {
+            $analyticsData = new ArrayData([
+                'GoogleAnalyticsTrackingID' => $trackingID,
+                'GoogleAnalyticsParameters' => $config->GoogleAnalyticsParameters,
+                'GoogleAnalyticsConstructorParameters' => $config->GoogleAnalyticsConstructorParameters
+            ]);
+            Requirements::insertHeadTags($analyticsData->renderWith('GoogleAnalyticsJSSnippet'), 'GoogleAnalytics');
+        }
+    }
+}
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..2f7b18b
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,17 @@
+{
+	"name": "bigfork/google-analytics",
+	"type": "silverstripe-vendormodule",
+	"description": "Slimline module for configuring Google Analytics via SilverStripe CMS. Intended for advanced users, the ability to add parameters through CMS makes it very possible to break the whole site.",
+	"authors": [{
+		"name": "Loz Calver",
+		"email": "lozcalver@bigfork.co.uk"
+	}, {
+        "name": "Colin Richardson",
+        "email": "colinrichardson@bigfork.co.uk"
+    }],
+	"require":
+	{
+		"silverstripe/framework": "^4",
+		"silverstripe/cms": "^4"
+	}
+}
diff --git a/templates/GoogleAnalyticsJSSnippet.ss b/templates/GoogleAnalyticsJSSnippet.ss
new file mode 100644
index 0000000..c7d295d
--- /dev/null
+++ b/templates/GoogleAnalyticsJSSnippet.ss
@@ -0,0 +1,8 @@
+<script async src="https://www.googletagmanager.com/gtag/js?id={$GoogleAnalyticsTrackingID}"></script>
+<script>
+    window.dataLayer = window.dataLayer || [];
+    function gtag(){dataLayer.push(arguments);}
+    gtag('js', new Date());
+    gtag('config', '{$GoogleAnalyticsTrackingID}'<% if $GoogleAnalyticsConstructorParameters %>, {$GoogleAnalyticsConstructorParameters.RAW}<% end_if %>);<% if $GoogleAnalyticsParameters %>
+    {$GoogleAnalyticsParameters.RAW}<% end_if %>
+</script>