Archive snapshots of websites locally (#672)

* Add basic HTML snapshots

* Implement asset list

* Add snapshot creation tests

* Add deletion tests

* Show file size

* Remove snapshots

* Create new snapshots

* Switch to single-file

* CSS tweak

* Remove auto refresh

* Show delete link when there is no file yet

* Add current date to display name

* Add flag for snapshot support

* Add option for disabling automatic snapshots

* Make snapshots sharable

* Document image variants

* Update README.md

* Add migrations

* Fix tests

bookmarks/migrations/0030_bookmarkasset.py

@@ -0,0 +1,43 @@
+# Generated by Django 5.0.2 on 2024-03-31 08:21
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("bookmarks", "0029_bookmark_list_actions_toast"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="BookmarkAsset",
+            fields=[
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("date_created", models.DateTimeField(auto_now_add=True)),
+                ("file", models.CharField(blank=True, max_length=2048)),
+                ("file_size", models.IntegerField(null=True)),
+                ("asset_type", models.CharField(max_length=64)),
+                ("content_type", models.CharField(max_length=128)),
+                ("display_name", models.CharField(blank=True, max_length=2048)),
+                ("status", models.CharField(max_length=64)),
+                ("gzip", models.BooleanField(default=False)),
+                (
+                    "bookmark",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        to="bookmarks.bookmark",
+                    ),
+                ),
+            ],
+        ),
+    ]

bookmarks/migrations/0031_userprofile_enable_automatic_html_snapshots.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.0.2 on 2024-04-01 10:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("bookmarks", "0030_bookmarkasset"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="userprofile",
+            name="enable_automatic_html_snapshots",
+            field=models.BooleanField(default=True),
+        ),
+    ]

bookmarks/migrations/0032_html_snapshots_hint_toast.py

@@ -0,0 +1,34 @@
+# Generated by Django 5.0.2 on 2024-04-01 12:17
+
+from django.db import migrations
+from django.contrib.auth import get_user_model
+
+from bookmarks.models import Toast
+
+User = get_user_model()
+
+
+def forwards(apps, schema_editor):
+
+    for user in User.objects.all():
+        toast = Toast(
+            key="html_snapshots_hint",
+            message="This version adds a new feature for archiving snapshots of websites locally. To use it, you need to switch to a different Docker image. See the installation instructions on GitHub for details.",
+            owner=user,
+        )
+        toast.save()
+
+
+def reverse(apps, schema_editor):
+    Toast.objects.filter(key="bookmark_list_actions_hint").delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("bookmarks", "0031_userprofile_enable_automatic_html_snapshots"),
+    ]
+
+    operations = [
+        migrations.RunPython(forwards, reverse),
+    ]