Store instance version in the client table

It is updated on new login, on entering the settings page, and on
timeline load. The last may be too often, but I thought the other
two were not often enough.

brutaldon/migrations/0021_client_version.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.1.5 on 2019-04-29 18:37
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('brutaldon', '0020_auto_20190127_2159'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='client',
+            name='version',
+            field=models.CharField(default='1.0', max_length=8),
+        ),
+    ]

brutaldon/models.py

@@ -8,6 +8,7 @@ timezones = [(tz, tz) for tz in common_timezones]
 class Client(models.Model):
     name = models.CharField(default = "brutaldon", max_length=80)
     api_base_id = models.URLField(default="https://mastodon.social")
+    version = models.CharField(default="1.0", max_length=8)
     client_id = models.CharField(null=True, blank=True, max_length=2048)
     client_secret = models.CharField(null=True, blank=True, max_length=2048)
 

brutaldon/views.py

@@ -304,6 +304,8 @@ def login(request):
                 client_id = client.client_id,
                 client_secret = client.client_secret,
                 api_base_url = api_base_url)
+            client.version = mastodon.instance().get("version")
+            client.save()
             return redirect(mastodon.auth_request_url(redirect_uris=redirect_uris,
                                                       scopes=['read', 'write', 'follow']))
         else:
@@ -394,6 +396,8 @@ def old_login(request):
                 client_id = client.client_id,
                 client_secret = client.client_secret,
                 api_base_url = api_base_url)
+            client.version = mastodon.instance().get("version")
+            client.save()
 
             try:
                 account = Account.objects.get(email=email, client_id=client.id)
@@ -545,6 +549,9 @@ def user(request, username, prev=None, next=None):
 def settings(request):
     try:
         account, mastodon = get_usercontext(request)
+        account.client.version = mastodon.instance().get("version")
+        account.client.save()
+
     except NotLoggedInException:
         return redirect(about)
     if request.method == 'POST':