Show date close date (P3999) in item detail

frontend/App.vue

@@ -321,6 +321,11 @@
             <br>{{wd_item.street_address[0]}}
           </span>
 
+          <span v-if="wd_item.closed.length">
+            <br><strong>closed</strong>
+            <br>{{wd_item.closed.join('; ')}}
+          </span>
+
           </div>
           <div class="col">
 

matcher/model.py

@@ -145,18 +145,21 @@ class Item(Base):
         return dict(d) or None
 
     def get_isa_qids(self):
-        return {v["id"] for v in self.get_claim("P31") if v}
+        return [v["id"] for v in self.get_claim("P31") if v]
 
     def is_street(self):
         street_items = {
             'Q79007',  # street
             'Q21000333',  # shopping street
         }
-        return bool(street_items & self.get_isa_qids())
+        return bool(street_items & set(self.get_isa_qids()))
 
     def is_tram_stop(self):
         return 'Q2175765' in self.get_isa_qids()
 
+    def closed(self):
+        return [utils.format_wikibase_time(v) for v in self.get_claim("P3999") if v]
+
 # class Claim(Base):
 #     __tablename__ = "claim"
 #     item_id = Column(Integer, primary_key=True)

matcher/utils.py

@@ -6,6 +6,7 @@ import math
 import user_agents
 import re
 import pattern.en
+from datetime import date
 
 metres_per_mile = 1609.344
 feet_per_metre = 3.28084
@@ -168,3 +169,17 @@ def pluralize_label(label):
         return "mines"
 
     return pattern.en.pluralize(text)
+
+
+def format_wikibase_time(v):
+    p = v["precision"]
+    t = v["time"]
+
+    assert p in (9, 10, 11)
+
+    if p == 11:
+        return date.fromisoformat(t[1:11]).strftime("%d %B %Y")
+    if p == 10:
+        return date.fromisoformat(t[1:8] + "-01").strftime("%B %Y")
+    if p == 9:
+        return t[1:5]