scripts: Do not use UNIX_TIMESTAMP

Avoid using UNIX_TIMESTAMP which is not part of the SQL standard.

See f2a6bd20

 (git-interface: Do not use UNIX_TIMESTAMP, 2016-08-05) for
related changes.
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>

scripts/pkgmaint.py

 #!/usr/bin/python3
 
+import time
+
 import aurweb.db
 
 
 def main():
     conn = aurweb.db.Connection()
 
+    limit_to = int(time.time()) - 86400
     conn.execute("DELETE FROM PackageBases WHERE " +
-                 "UNIX_TIMESTAMP() - SubmittedTS > 86400 " +
-                 "AND PackagerUID IS NULL")
+                 "SubmittedTS < ? AND PackagerUID IS NULL", [limit_to])
 
     conn.commit()
     conn.close()

scripts/popupdate.py

 #!/usr/bin/python3
 
+import time
+
 import aurweb.db
 
 
@@ -10,10 +12,11 @@ def main():
                  "SELECT COUNT(*) FROM PackageVotes " +
                  "WHERE PackageVotes.PackageBaseID = PackageBases.ID)")
 
+    now = int(time.time())
     conn.execute("UPDATE PackageBases SET Popularity = (" +
-                 "SELECT COALESCE(SUM(POWER(0.98, (UNIX_TIMESTAMP() - VoteTS) / 86400)), 0.0) " +
+                 "SELECT COALESCE(SUM(POWER(0.98, (? - VoteTS) / 86400)), 0.0) " +
                  "FROM PackageVotes WHERE PackageVotes.PackageBaseID = " +
-                 "PackageBases.ID AND NOT VoteTS IS NULL)")
+                 "PackageBases.ID AND NOT VoteTS IS NULL)", [now])
 
     conn.commit()
     conn.close()