Developer corner¶

Target group: Developers

Table of Contents

Objects¶

A data object is available for use in the PSR-14 events:

JavaScriptCode¶

The \Brotkrueml\MatomoIntegration\Code\JavaScriptCode object holds a piece of arbitrary JavaScript code used in the BeforeTrackPageViewEvent, AfterTrackPageViewEvent and AddToDataLayerEvent events. This object is necessary to distinguish between a "normal" string and JavaScript code for later embedding.

Example:

$javaScriptCode = new \Brotkrueml\MatomoIntegration\Code\JavaScriptCode(
   '/* some JavaScript code */'
);

The object provides the following method:

__toString(): string ¶: Returns the JavaScript code.

PSR-14 events¶

To enrich Matomo's JavaScript tracking code with additional calls, PSR-14 events are available. You can draw inspiration from the Use cases chapter.

ModifySiteConfigurationEvent¶

New in version 2.1.0

This event allows to modify some settings from the site configuration on runtime.

The event provides the following methods:

getRequest(): \Psr\Http\Message\ServerRequestInterface ¶: Get the current PSR-7 request object.

getSiteIdentifier(): string ¶: Get the site identifier.

getUrl(): string ¶: Get the URL.

setUrl(string $url): void ¶: Set a URL.

getSiteId(): int ¶: Get the site ID.

setSiteId(int $siteId): void ¶: Set a site ID.

getTagManagerContainerIds(): array ¶: Get the list of container IDs for the Matomo Tag Manager.

setTagManagerContainerIds(array $containerIds): void ¶: Set a list of container IDs for the Matomo Tag Manager.

Example¶

The example below adjusts the site ID depending on the current language.

Create the event listener

EXT:your_extension/Classes/EventListener/ModifyMatomoSiteId.php

<?php
declare(strict_types=1);

namespace YourVender\YourExtension\EventListener;

use Brotkrueml\MatomoIntegration\Event\ModifySiteConfigurationEvent;

final class ModifyMatomoSiteId
{
   public function __invoke(ModifySiteConfigurationEvent $event): void
   {
      if ($event->getRequest()->getAttribute('language')->getLanguageId() === 1) {
         // Override the site ID when in another language
         $event->setSiteId(42);
      }
   }
}

Register your event listener

EXT:your_extension/Configuration/Services.yaml

services:
   YourVendor\YourExtension\EventListener\ModifyMatomoSiteId:
      tags:
         - name: event.listener
           identifier: 'modifyMatomoSiteId'

EnrichScriptTagEvent¶

With this event you can add attributes to the surrounding <script> tag. For a concrete usage have a look into the use cases.

The event provides the following methods:

getRequest(): \Psr\Http\Message\ServerRequestInterface ¶: Get the current PSR-7 request object.

setId(string $id): void ¶: Set the id.

setType(string $type): void ¶: Set the type.

addDataAttribute(string $name, string $value = ''): void ¶: Add a data attribute with the $name without the data- prefix. The value is optional, if it is not given or an empty string only the name is rendered.

Example¶

The example below results in the following script snippet:

<script id="some-id" data-foo="bar" data-qux>/* the tracking code */</script>

Create the event listener

EXT:your_extension/Classes/EventListener/AddAttributesToMatomoScriptTag.php

<?php
declare(strict_types=1);

namespace YourVender\YourExtension\EventListener;

use Brotkrueml\MatomoIntegration\Event\EnrichScriptTagEvent;

final class AddAttributesToMatomoScriptTag
{
   public function __invoke(EnrichScriptTagEvent $event): void
   {
      // Set the id
      $event->setId('some-id');

      // Add data attributes
      $event->addDataAttribute('foo', 'bar');
      $event->addDataAttribute('qux');
   }
}

Register your event listener

EXT:your_extension/Configuration/Services.yaml

services:
   YourVendor\YourExtension\EventListener\AddAttributesToMatomoScriptTag:
      tags:
         - name: event.listener
           identifier: 'addAttributesToMatomoScriptTag'

BeforeTrackPageViewEvent¶

This event can be used to add calls before the embedding of the trackPageView code.

This can be helpful when you want to adjust the document title or to add custom dimensions.

The event provides the following methods:

getRequest(): \Psr\Http\Message\ServerRequestInterface ¶: Get the current PSR-7 request object.

addJavaScriptCode(string $code): void ¶: Adds a JavaScript code snippet.

addMatomoMethodCall(string $method, ...$parameters): void ¶: Adds a Matomo method call for the given method and optional parameters. The value can be of type: array, bool, int, float, string or \Brotkrueml\MatomoIntegration\Code\JavaScriptCode.

Example¶

The example below results in the following code:

// ...
_paq.push(["setDocumentTitle", "Some Document Title"]);
_paq.push(["trackPageView"]);
// ...

or (for illustration of the usage of the \Brotkrueml\MatomoIntegration\Code\JavaScriptCode object):

// ...
function getDocumentTitle { return "Some Document Title"; }
_paq.push(["setDocumentTitle", getDocumentTitle()]);
_paq.push(["trackPageView"]);
// ...

Create the event listener

EXT:your_extension/Classes/EventListener/SetDocumentTitleExample.php

<?php
declare(strict_types=1);

namespace YourVender\YourExtension\EventListener;

use Brotkrueml\MatomoIntegration\Event\BeforeTrackPageViewEvent;

final class SetDocumentTitleExample
{
   public function __invoke(BeforeTrackPageViewEvent $event): void
   {
      // Set the document title
      $event->addMatomoMethodCall('setDocumentTitle', 'Some Document Title');

      // OR:
      // Add some JavaScript code
      $event->addJavaScriptCode('function getDocumentTitle { return "Some Document Title"; }');
      // Set the document title
      $event->addMatomoMethodCall('setDocumentTitle', new JavaScriptCode('getDocumentTitle()');]);
   }
}

Register your event listener

EXT:your_extension/Configuration/Services.yaml

services:
   YourVendor\YourExtension\EventListener\SetDocumentTitleExample:
      tags:
         - name: event.listener
           identifier: 'setDocumentTitleExample'

TrackSiteSearchEvent¶

The event is useful for tracking site search metrics, such as the keyword or the number of results. Especially the number of results can be interesting, since Matomo displays a list of keywords without results.

Further information can be found on the Matomo website:

Important

If this event is used and the keyword is not empty, the default trackPageView call is replaced by a trackSiteSearch call, as recommended by Matomo.

The event provides the following methods:

getRequest(): \Psr\Http\Message\ServerRequestInterface ¶: Get the current PSR-7 request object.

setKeyword(string $keyword): void ¶: Sets the keyword.

setCategory(string|false $category): void ¶: Sets an optional category.

setSearchCount(int|false $searchCount): void ¶: Sets an optional search count.

addCustomDimension(int $id, string $value): void ¶: Adds a custom dimension with the given ID and value.

Example¶

The example below results in the following code:

// ...
_paq.push(["trackSiteSearch", "some search keyword", false, 42, {"dimension3": "Some custom dimension value"}]);
// ...

Create the event listener

EXT:your_extension/Classes/EventListener/SomeTrackSiteSearchExample.php

<?php
declare(strict_types=1);

namespace YourVender\YourExtension\EventListener;

use Brotkrueml\MatomoIntegration\Event\TrackSiteSearchEvent;

final class SomeTrackSiteSearchExample
{
   public function __invoke(TrackSiteSearchEvent $event): void
   {
      $event->setKeyword('some search keyword');
      $event->setSearchCount(42);
      $event->addCustomDimension(3, 'some custom dimension value');
   }
}

Register your event listener

EXT:your_extension/Configuration/Services.yaml

services:
   YourVendor\YourExtension\EventListener\SomeTrackSiteSearchExample:
      tags:
         - name: event.listener
           identifier: 'someTrackSiteSearchExample'

EnrichTrackPageViewEvent¶

This event can be used to enrich the trackPageView call with a page title and/or a custom dimension only for the page view.

The event provides the following methods:

getRequest(): \Psr\Http\Message\ServerRequestInterface ¶: Get the current PSR-7 request object.

setPageTitle(string $pageTitle): void ¶

Sets the page title.

addCustomDimension(int $id, string $value): void ¶

Adds a custom dimension with the given ID and value.

Example¶

The example below results in the following code:

// ...
_paq.push(["trackPageView", "Some Page Title", {"dimension3": "Some Custom Dimension Value"}]);
// ...

Create the event listener

EXT:your_extension/Classes/EventListener/SomeEnrichTrackPageViewExample.php

<?php
declare(strict_types=1);

namespace YourVender\YourExtension\EventListener;

use Brotkrueml\MatomoIntegration\Event\EnrichTrackPageViewEvent;

final class SomeEnrichTrackPageViewExample
{
   public function __invoke(EnrichTrackPageViewEvent $event): void
   {
      // You can set another page title
      $event->setPageTitle('Some Page Title');
      // And/or you can set a custom dimension only for the track page view call
      $event->addCustomDimension(3, 'Some Custom Dimension Value');
   }
}

Register your event listener

EXT:your_extension/Configuration/Services.yaml

services:
   YourVendor\YourExtension\EventListener\SomeEnrichTrackPageViewExample:
      tags:
         - name: event.listener
           identifier: 'someEnrichTrackPageViewExample'

AfterTrackPageViewEvent¶

This event can be used to add calls after the embedding of the trackPageView code.

The event provides the following methods:

getRequest(): \Psr\Http\Message\ServerRequestInterface ¶: Get the current PSR-7 request object.

addJavaScriptCode(string $code): void ¶: Adds a JavaScript code snippet.

addMatomoMethodCall(string $method, ...$parameters): void ¶: Adds a Matomo method call for the given method and optional parameters. The value can be of type: array, bool, int, float, string or \Brotkrueml\MatomoIntegration\Code\JavaScriptCode.

Example¶

The example below results in the following code:

// ...
_paq.push(["trackPageView"]);
_paq.push(["enableHeartBeatTimer", 30]);
// ...

Create the event listener

        EXT:your_extension/Classes/EventListener/EnableHeartBeatTimerWithActiveSecondsExample.php
    

<?php
declare(strict_types=1);

namespace YourVender\YourExtension\EventListener;

use Brotkrueml\MatomoIntegration\Event\AfterTrackPageViewEvent;

final class EnableHeartBeatTimerWithActiveSecondsExample
{
   public function __invoke(AfterTrackPageViewEvent $event): void
   {
      $event->addMatomoMethodCall('enableHeartBeatTimer', 30);
   }
}

Register your event listener

EXT:your_extension/Configuration/Services.yaml

services:
   YourVendor\YourExtension\EventListener\EnableHeartBeatTimerWithActiveSecondsExample:
      tags:
         - name: event.listener
           identifier: 'enableHeartBeatTimerWithActiveSecondsExample'

AddToDataLayerEvent¶

With this event you can add variables to the Matomo tag manager data layer.

The event provides the following method:

getRequest(): \Psr\Http\Message\ServerRequestInterface ¶: Get the current PSR-7 request object.

addVariable(string $name, $value): void ¶: Adds a variable with a name and value. The value can be of type: string, int, float or \Brotkrueml\MatomoIntegration\Code\JavaScriptCode.

Example¶

The example below results in the following code:

var _mtm=window._mtm||[];
_mtm.push({"mtm.startTime": (new Date().getTime()), "event": "mtm.Start", "orderTotal": 4545.45, "orderCurrency": "EUR"});
// ...

The mtm.startTime and event variables are added always by default.

Create the event listener

EXT:your_extension/Classes/EventListener/AddOrderDetailsToDataLayerExample.php

<?php
declare(strict_types=1);

namespace YourVender\YourExtension\EventListener;

use Brotkrueml\MatomoIntegration\Event\AddToDataLayerEvent;

final class AddOrderDetailsToDataLayerExample
{
    public function __invoke(AddToDataLayerEvent $event): void
    {
        $event->addVariable('orderTotal', 4545.45);
        $event->addVariable('orderCurrency', 'EUR');
    }
}

Register your event listener

EXT:your_extension/Configuration/Services.yaml

services:
   YourVendor\YourExtension\EventListener\AddOrderDetailsToDataLayerExample:
      tags:
         - name: event.listener
           identifier: 'addOrderDetailsToDataLayerExample'