change(popupdate): converted to use aurweb.db ORM

Signed-off-by: Kevin Morris <kevr@0cost.org>

aurweb/routers/packages.py

@@ -908,8 +908,7 @@ async def pkgbase_vote(request: Request, name: str):
                       VoteTS=now)
 
         # Update NumVotes/Popularity.
-        conn = db.ConnectionExecutor(db.get_engine().raw_connection())
-        popupdate.run_single(conn, pkgbase)
+        popupdate.run_single(pkgbase)
 
     return RedirectResponse(f"/pkgbase/{name}",
                             status_code=HTTPStatus.SEE_OTHER)
@@ -929,8 +928,7 @@ async def pkgbase_unvote(request: Request, name: str):
             db.delete(vote)
 
         # Update NumVotes/Popularity.
-        conn = db.ConnectionExecutor(db.get_engine().raw_connection())
-        popupdate.run_single(conn, pkgbase)
+        popupdate.run_single(pkgbase)
 
     return RedirectResponse(f"/pkgbase/{name}",
                             status_code=HTTPStatus.SEE_OTHER)
@@ -1473,8 +1471,7 @@ async def pkgbase_merge_post(request: Request, name: str,
     pkgbase_merge_instance(request, pkgbase, target)
 
     # Run popupdate on the target.
-    conn = db.ConnectionExecutor(db.get_engine().raw_connection())
-    popupdate.run_single(conn, target)
+    popupdate.run_single(target)
 
     if not next:
         next = f"/pkgbase/{target.Name}"

aurweb/scripts/popupdate.py

@@ -1,51 +1,71 @@
 #!/usr/bin/env python3
 
 from datetime import datetime
+from typing import List
 
-import aurweb.db
+from sqlalchemy import and_, func
+from sqlalchemy.sql.functions import coalesce
+from sqlalchemy.sql.functions import sum as _sum
+
+from aurweb import db
+from aurweb.models import PackageBase, PackageVote
 
 
-def run_single(conn, pkgbase):
+def run_variable(pkgbases: List[PackageBase] = []) -> None:
+    """
+    Update popularity on a list of PackageBases.
+
+    If no PackageBase is included, we update the popularity
+    of every PackageBase in the database.
+
+    :param pkgbases: List of PackageBase instances
+    """
+    now = int(datetime.utcnow().timestamp())
+
+    # NumVotes subquery.
+    votes_subq = db.get_session().query(
+        func.count("*")
+    ).select_from(PackageVote).filter(
+        PackageVote.PackageBaseID == PackageBase.ID
+    )
+
+    # Popularity subquery.
+    pop_subq = db.get_session().query(
+        coalesce(_sum(func.pow(0.98, (now - PackageVote.VoteTS) / 86400)), 0.0),
+    ).select_from(PackageVote).filter(
+        and_(PackageVote.PackageBaseID == PackageBase.ID,
+             PackageVote.VoteTS.isnot(None))
+    )
+
+    with db.begin():
+        query = db.query(PackageBase)
+
+        ids = set()
+        if pkgbases:
+            ids = {pkgbase.ID for pkgbase in pkgbases}
+            query = query.filter(PackageBase.ID.in_(ids))
+
+        query.update({
+            "NumVotes": votes_subq.scalar_subquery(),
+            "Popularity": pop_subq.scalar_subquery()
+        })
+
+
+def run_single(pkgbase: PackageBase) -> None:
     """ A single popupdate. The given pkgbase instance will be
     refreshed after the database update is done.
 
     NOTE: This function is compatible only with aurweb FastAPI.
 
-    :param conn: db.Connection[Executor]
     :param pkgbase: Instance of db.PackageBase
     """
-
-    conn.execute("UPDATE PackageBases SET NumVotes = ("
-                 "SELECT COUNT(*) FROM PackageVotes "
-                 "WHERE PackageVotes.PackageBaseID = PackageBases.ID) "
-                 "WHERE PackageBases.ID = ?", [pkgbase.ID])
-
-    now = int(datetime.utcnow().timestamp())
-    conn.execute("UPDATE PackageBases SET Popularity = ("
-                 "SELECT COALESCE(SUM(POWER(0.98, (? - VoteTS) / 86400)), 0.0) "
-                 "FROM PackageVotes WHERE PackageVotes.PackageBaseID = "
-                 "PackageBases.ID AND NOT VoteTS IS NULL) WHERE "
-                 "PackageBases.ID = ?", [now, pkgbase.ID])
-
-    conn.commit()
-    conn.close()
-    aurweb.db.refresh(pkgbase)
+    run_variable([pkgbase])
+    db.refresh(pkgbase)
 
 
 def main():
-    conn = aurweb.db.Connection()
-    conn.execute("UPDATE PackageBases SET NumVotes = ("
-                 "SELECT COUNT(*) FROM PackageVotes "
-                 "WHERE PackageVotes.PackageBaseID = PackageBases.ID)")
-
-    now = int(datetime.utcnow().timestamp())
-    conn.execute("UPDATE PackageBases SET Popularity = ("
-                 "SELECT COALESCE(SUM(POWER(0.98, (? - VoteTS) / 86400)), 0.0) "
-                 "FROM PackageVotes WHERE PackageVotes.PackageBaseID = "
-                 "PackageBases.ID AND NOT VoteTS IS NULL)", [now])
-
-    conn.commit()
-    conn.close()
+    db.get_engine()
+    run_variable()
 
 
 if __name__ == '__main__':