v1.3.1: filter-score (titel 2x + summary 1x, drempel 2)

- losse 1-hit in summary volstaat niet meer: 'ns-trein' in een
  rechtszaak-artikel (stenengooier) telt als 1 cluster en wordt geblokkeerd
- cluster-aware teller: aaneengesloten matches (NS-trein, openbaar vervoer,
  pdf) samenvoegen
- bus(?:sen)? suffix: 'Meer bussen naar TU' komt terug
- root-cause config-corruptie: re.sub-replacement de-escaped \\b naar \b
  (YAML-backspace); nu regel-bewerking zonder escape-processing

buzzrss/bot.py

@@ -51,7 +51,7 @@ rss_change_level = EventType.find("xyz.maubot.rss", t_class=EventType.Class.STAT
 DEFAULT_MATCH_FILTER = (
     r"(?i)"
     r"\b(?:ns|arriva|qbuzz|connexxion|cxx|transdev|keolis|ret|gvb|ebs|htm|syntus|breng|u-ov|allgo|flixbus|blauwnet|r-net|valleilijn|waterbus|eurostar|thalys|randstadrail|gvu|ov)\b"
-    r"|\b(?:bus|tram|metro)(?:halte|haltes|lijn|lijnen|station|stations|verkeer|net|staking)?\b"
+    r"|\b(?:bus|tram|metro)(?:halte|haltes|lijn|lijnen|station|stations|verkeer|net|staking|sen)?\b"
     r"|\btrein(?:en|verkeer|stel(?:len)?|staking|ongeluk|reizigers?|station|stations)?\b"
     r"|\b(?:spoorweg|spoorbaan|spoorlijn|spoorverkeer|spoorwegovergang|spoorstoring|perron|perrons|overweg|overwegen|seinstoring|wisselstoring|sein|ontsporing|ontspoord|spoorstaking)\b"
     r"|\b(?:openbaar vervoer|dienstregeling|reizigers?|inchecken|uitchecken|pont|ponten|lightrail|pendelbus|shuttlebus)\b"
@@ -134,11 +134,29 @@ class RSSBot(Plugin):
         except Exception:
             self.log.exception("Fatal error while polling feeds")
 
+    @staticmethod
+    def _filter_score(title: str, summary: str, match_filter: str) -> int:
+        """Score = 2× hits in titel + 1× hits in summary. Aaneengesloten matches
+        (bv 'NS-trein', 'openbaar vervoer') tellen als 1 cluster."""
+        def count(text: str) -> int:
+            spans = sorted((m.start(), m.end()) for m in re.finditer(match_filter, text))
+            if not spans:
+                return 0
+            clusters, prev_end = 1, spans[0][1]
+            for s, e in spans[1:]:
+                if s - prev_end <= 1:
+                    prev_end = max(prev_end, e)
+                else:
+                    clusters += 1
+                    prev_end = e
+            return clusters
+        return 2 * count(title) + count(summary)
+
     async def _send(self, feed: Feed, entry: Entry, sub: Subscription) -> EventID | None:
         match_filter = self.config["match_filter"]
         if match_filter:
-            haystack = f"{entry.title}\n{html.unescape(re.sub(r'<[^>]+>', '', entry.summary))}"
-            if not re.search(match_filter, haystack):
+            summary = html.unescape(re.sub(r"<[^>]+>", "", entry.summary))
+            if self._filter_score(entry.title, summary, match_filter) < 2:
                 return None
 
         message = sub.notification_template.safe_substitute(