Improve conference importer and series attendance

agenda/add_new_conference.py

@@ -502,6 +502,42 @@ def parse_yaml_datetime(value: typing.Any) -> datetime | None:
     return None
 
 
+def parse_yaml_date_value(value: typing.Any) -> date | datetime | None:
+    """Convert YAML date/datetime strings to date-like values."""
+    if isinstance(value, datetime):
+        return value
+
+    if isinstance(value, date):
+        return value
+
+    if not isinstance(value, str):
+        return None
+
+    try:
+        if " " in value or "T" in value:
+            return datetime.fromisoformat(value)
+        return date.fromisoformat(value)
+    except ValueError:
+        return None
+
+
+def normalize_date_values(conf: dict[str, typing.Any]) -> None:
+    """Normalize quoted ISO date/datetime values produced by the LLM."""
+    dates = conf.get("dates")
+    if isinstance(dates, dict):
+        for field in ("start", "end", "earliest", "latest"):
+            if field in dates:
+                parsed = parse_yaml_date_value(dates[field])
+                if parsed is not None:
+                    dates[field] = parsed
+
+    for field in ("start", "end"):
+        if field in conf:
+            parsed = parse_yaml_date_value(conf[field])
+            if parsed is not None:
+                conf[field] = parsed
+
+
 def same_type_as_start(
     start_value: typing.Any,
     new_dt: datetime,
@@ -529,6 +565,7 @@ def same_type_as_start(
 
 def normalize_dates_field(conf: dict[str, typing.Any]) -> None:
     """Move legacy top-level date fields into the nested dates mapping."""
+    normalize_date_values(conf)
     raw_dates = conf.get("dates")
     dates = raw_dates if isinstance(raw_dates, dict) else None
 
@@ -550,6 +587,20 @@ def normalize_dates_field(conf: dict[str, typing.Any]) -> None:
     conf.pop("start", None)
     conf.pop("end", None)
     conf.pop("date_status", None)
+    normalize_date_values(conf)
+
+
+def validate_generated_conference(conf: dict[str, typing.Any]) -> None:
+    """Validate generated conference YAML before inserting it."""
+    try:
+        conference_date_fields(conf)
+    except ValueError as exc:
+        generated_yaml = yaml.dump(conf, sort_keys=False, allow_unicode=True).strip()
+        raise ValueError(
+            "Generated conference YAML is missing valid date information. "
+            "Expected nested `dates:` with exact/tentative start/end or "
+            f"approximate earliest/latest.\n\nGenerated YAML:\n{generated_yaml}"
+        ) from exc
 
 
 def maybe_extract_explicit_end_time(source_text: str) -> int | None:
@@ -661,6 +712,7 @@ def add_new_conference(url: str, yaml_path: str) -> bool:
     normalize_dates_field(new_conf)
     normalise_end_field(new_conf, source_text)
     normalize_dates_field(new_conf)
+    validate_generated_conference(new_conf)
 
     if detected_coordinates is not None:
         new_conf["latitude"] = detected_coordinates[0]