Allow caching of mirror status info

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/mirrors/utils.py b/mirrors/utils.py
new file mode 100644
index 00000000..bbbaca26
--- /dev/null
+++ b/mirrors/utils.py
@@ -0,0 +1,45 @@
+from django.db.models import Avg, Count, Max, Min, StdDev
+
+from main.utils import cache_function
+from .models import MirrorLog, MirrorProtocol, MirrorUrl
+
+import datetime
+
+cutoff_time = datetime.datetime.utcnow() - datetime.timedelta(hours=24)
+
+@cache_function(300)
+def get_mirror_statuses():
+    protocols = MirrorProtocol.objects.exclude(protocol__iexact='rsync')
+    # I swear, this actually has decent performance...
+    urls = MirrorUrl.objects.select_related(
+            'mirror', 'protocol').filter(
+            mirror__active=True, mirror__public=True,
+            protocol__in=protocols).filter(
+            logs__check_time__gte=cutoff_time).annotate(
+            check_count=Count('logs'), last_sync=Max('logs__last_sync'),
+            last_check=Max('logs__check_time'),
+            duration_avg=Avg('logs__duration'), duration_min=Min('logs__duration'),
+            duration_max=Max('logs__duration'), duration_stddev=StdDev('logs__duration')
+            ).order_by('-last_sync', '-duration_avg')
+
+    for url in urls:
+        if url.last_check and url.last_sync:
+            d = url.last_check - url.last_sync
+            url.delay = d
+            url.score = d.days * 24 + d.seconds / 3600 + url.duration_avg + url.duration_stddev
+        else:
+            url.delay = None
+            url.score = None
+    return urls
+
+@cache_function(300)
+def get_mirror_errors():
+    errors = MirrorLog.objects.filter(
+            is_success=False, check_time__gte=cutoff_time).values(
+            'url__url', 'url__protocol__protocol', 'url__mirror__country',
+            'error').annotate(
+            error_count=Count('error'), last_occurred=Max('check_time')
+            ).order_by('-last_occurred', '-error_count')
+    return list(errors)
+
+# vim: set ts=4 sw=4 et: