From cc8125cb14c3db9580c80e170ba2141cc48e8d4d Mon Sep 17 00:00:00 2001
From: Kike Franssen <114907819+kikef98@users.noreply.github.com>
Date: Fri, 11 Jul 2025 10:51:13 +0200
Subject: [PATCH] Migration - harmonize date formats of change events (#562)

---
 CHANGELOG.md                                  |  2 ++
 ...0250708140355-fix-changeevent-dates.sparql | 26 +++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 config/migrations/2025/20250708140355-fix-changeevent-dates.sparql

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d6efc76..c80ecd1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,12 +10,14 @@
 - Add URI to resource's organization responses
 - Fix query for organizations report [OP-3636]
 - Bump report-generation-service to most recent version
+- Write migration to harmonize date formats of change events [OP-3559]
 ### Deploy notes
 ```
 drc pull deltanotifier; drc up -d deltanotifier
 drc restart migrations-triggering-indexing resource
 drc pull frontend; drc up -d frontend
 drc pull report-generation; drc up -d report-generation
+drc restart migrations; drc logs -ft --tail=200 migrations
 ```
 
 ## v1.33.3 (2025-07-04)
diff --git a/config/migrations/2025/20250708140355-fix-changeevent-dates.sparql b/config/migrations/2025/20250708140355-fix-changeevent-dates.sparql
new file mode 100644
index 0000000..875d693
--- /dev/null
+++ b/config/migrations/2025/20250708140355-fix-changeevent-dates.sparql
@@ -0,0 +1,26 @@
+PREFIX org: <http://www.w3.org/ns/org#>
+PREFIX dcterms: <http://purl.org/dc/terms/>
+PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
+
+DELETE {
+  GRAPH ?g {
+    ?s dcterms:date ?oldDate .
+  }
+}
+INSERT {
+  GRAPH ?g {
+    ?s dcterms:date ?newDate .
+  }
+}
+WHERE {
+  GRAPH ?g {
+    ?s a org:ChangeEvent ;
+        dcterms:date ?oldDate .
+    FILTER(DATATYPE(?oldDate) != xsd:date)
+    FILTER(?g IN (
+      <http://mu.semte.ch/graphs/administrative-unit>,
+      <http://mu.semte.ch/graphs/worship-service>
+    ))
+    BIND(STRDT(SUBSTR(STR(?oldDate), 1, 10), xsd:date) AS ?newDate)
+  }
+}
\ No newline at end of file