Integrate Matomo Tag Manager

home/migrations/0052_sitesettings_mtm_container_id.py

@@ -0,0 +1,27 @@
+# Generated by Django 3.2.20 on 2023-11-09 17:56
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("home", "0051_auto_20230330_1105"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="sitesettings",
+            name="mtm_container_id",
+            field=models.CharField(
+                blank=True,
+                help_text=(
+                    "Currently this feature only works on devices using JavaScript"
+                    " (e.g. basic featurephones are not supported), and does not work"
+                    " with MNO zero-rating or Meta Free Basics."
+                ),
+                max_length=255,
+                null=True,
+                verbose_name="Matomo Tag Manager container ID",
+            ),
+        ),
+    ]

home/models.py

@@ -681,6 +681,16 @@ class SiteSettings(BaseSetting):
                                             blank=True,
                                             on_delete=models.SET_NULL)
     opt_in_to_google_web_light = models.BooleanField(default=False)
+    mtm_container_id = models.CharField(
+        verbose_name=_("Matomo Tag Manager container ID"),
+        max_length=255,
+        null=True,
+        blank=True,
+        help_text=_(
+            "Currently this feature only works on devices using JavaScript (e.g. basic"
+            " feature phones are not supported), and does not work with MNO zero-rating"
+            " or Meta Free Basics.")
+    )
 
     panels = [
         ImageChooserPanel('logo'),
@@ -754,6 +764,15 @@ class SiteSettings(BaseSetting):
             ],
             heading="Opt in to Google web light",
         ),
+        MultiFieldPanel(
+            [
+                FieldPanel(
+                    "mtm_container_id",
+                    heading="Tag Manager container ID",
+                ),
+            ],
+            heading="Matomo",
+        ),
     ]
 
     @classmethod

iogt/templates/base.html

@@ -45,6 +45,7 @@
         {# Override this in templates to add extra stylesheets #}
     {% endblock %}
     {% matomo_tracking_tags %}
+    {% matomo_tag_manager settings.home.SiteSettings.mtm_container_id %}
 </head>
 
 {% get_current_language_bidi as LANGUAGE_BIDI %}

matomo/templates/matomo_tag_manager.html

@@ -0,0 +1,10 @@
+{% if mtm_src %}
+<!-- Matomo Tag Manager -->
+<script>
+    var _mtm = window._mtm = window._mtm || [];
+    _mtm.push({'mtm.startTime': (new Date().getTime()), 'event': 'mtm.Start'});
+    var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
+    g.async=true; g.src='{{ mtm_src }}'; s.parentNode.insertBefore(g,s);
+</script>
+<!-- End Matomo Tag Manager -->
+{% endif %}

matomo/templatetags/matomo_tags.py

@@ -10,6 +10,19 @@
 register = template.Library()
 
 
+@register.inclusion_tag("matomo_tag_manager.html", takes_context=True)
+def matomo_tag_manager(context, container_id=None):
+    try:
+        server_url = settings.MATOMO_SERVER_URL
+    except AttributeError:
+        server_url = None
+
+    if server_url and container_id:
+        context.update({"mtm_src": f"{server_url}js/container_{container_id}.js"})
+
+    return context
+
+
 @register.inclusion_tag("matomo_tracking_tags.html", takes_context=True)
 def matomo_tracking_tags(context):
     enabled = is_enabled()

matomo/tests/test_matomo_tags.py

@@ -1,14 +1,14 @@
 from django.test import TestCase, override_settings
 
-from matomo.templatetags.matomo_tags import matomo_tracking_tags
+from matomo.templatetags.matomo_tags import matomo_tag_manager, matomo_tracking_tags
 
 
 @override_settings(
     MATOMO_TRACKING=True,
     MATOMO_SERVER_URL="https://example.com/",
     MATOMO_SITE_ID=456,
 )
-class MatomoTagsTests(TestCase):
+class MatomoTrackingTagsTests(TestCase):
     def test_only_enabled_when_required_settings_are_set(self):
         self.assertTrue(matomo_tracking_tags(create_context()).get("tracking_enabled"))
 
@@ -44,6 +44,41 @@ def test_visitor_id_is_created_for_clients_without_javascript(self):
             )
 
 
+class MatomoTagManagerTests(TestCase):
+    def test_enable_only_when_container_id_and_server_url(self):
+        with override_settings(MATOMO_SERVER_URL=None):
+            self.assertIsNone(
+                matomo_tag_manager(
+                    create_context(),
+                    container_id="ID",
+                ).get("mtm_src")
+            )
+
+        with override_settings(MATOMO_SERVER_URL="https://example.com/"):
+            self.assertIsNone(
+                matomo_tag_manager(
+                    create_context(),
+                    container_id=None,
+                ).get("mtm_src")
+            )
+            self.assertIsNotNone(
+                matomo_tag_manager(
+                    create_context(),
+                    container_id="ID",
+                ).get("mtm_src")
+            )
+
+    def test_generate_correct_tag_manager_url(self):
+        with override_settings(MATOMO_SERVER_URL="https://example.com/"):
+            self.assertEqual(
+                matomo_tag_manager(
+                    create_context(),
+                    container_id="ID",
+                ).get("mtm_src"),
+                "https://example.com/js/container_ID.js",
+            )
+
+
 class MockRequest:
     def __init__(self):
         self.session = dict()