1 files changed, 57 insertions, 0 deletions
diff --git a/todolists/utils.py b/todolists/utils.py
new file mode 100644
index 00000000..e04c2e5e
--- /dev/null
+++ b/todolists/utils.py
@@ -0,0 +1,57 @@
+from django.db import connections, router
+
+from .models import Todolist, TodolistPackage
+from packages.models import Package
+
+
+def todo_counts():
+    sql = """
+SELECT todolist_id, count(*), SUM(CASE WHEN status = %s THEN 1 ELSE 0 END)
+    FROM todolists_todolistpackage
+    WHERE removed IS NULL
+    GROUP BY todolist_id
+    """
+    database = router.db_for_write(TodolistPackage)
+    connection = connections[database]
+    cursor = connection.cursor()
+    cursor.execute(sql, [TodolistPackage.COMPLETE])
+    results = cursor.fetchall()
+    return {row[0]: (row[1], row[2]) for row in results}
+
+
+def get_annotated_todolists(incomplete_only=False):
+    lists = Todolist.objects.all().defer('raw').select_related(
+            'creator').order_by('-created')
+    lookup = todo_counts()
+
+    # tag each list with package counts
+    for todolist in lists:
+        counts = lookup.get(todolist.id, (0, 0))
+        todolist.pkg_count = counts[0]
+        todolist.complete_count = counts[1]
+        todolist.incomplete_count = counts[0] - counts[1]
+
+    if incomplete_only:
+        lists = [l for l in lists if l.incomplete_count > 0]
+
+    return lists
+
+
+def attach_staging(packages, list_id):
+    '''Look for any staging version of the packages provided and attach them
+    to the 'staging' attribute on each package if found.'''
+    pkgnames = TodolistPackage.objects.filter(
+            todolist_id=list_id).values('pkgname')
+    staging_pkgs = Package.objects.normal().filter(repo__staging=True,
+            pkgname__in=pkgnames)
+    # now build a lookup dict to attach to the correct package
+    lookup = {(p.pkgname, p.arch): p for p in staging_pkgs}
+
+    annotated = []
+    for package in packages:
+        in_staging = lookup.get((package.pkgname, package.arch), None)
+        package.staging = in_staging
+
+    return annotated
+
+# vim: set ts=4 sw=4 et: