Add delete workgroup query & repo

src/main/kotlin/fr/dcproject/repository/Workgroup.kt

@@ -40,6 +40,10 @@ class Workgroup(override var requester: Requester) : RepositoryI {
         .getFunction("upsert_workgroup")
         .selectOne("resource" to workgroup) ?: error("query 'upsert_workgroup' return null")
 
+    fun delete(workgroup: WorkgroupRef) = requester
+            .getFunction("delete_workgroup")
+            .perform("id" to workgroup.id)
+
     fun addMember(workgroup: WorkgroupI, member: CitizenI): List<CitizenBasic> =
         addMembers(workgroup, listOf(member))
 

src/main/resources/sql/functions/workgroup/delete_workgroup.sql

@@ -0,0 +1,9 @@
+create or replace function delete_workgroup(_id uuid) returns void
+    language plpgsql as
+$$
+begin
+    update workgroup set deleted_at = now()
+    where id = _id;
+end;
+$$;
+

src/test/sql/workgroup.sql

@@ -86,6 +86,12 @@ begin
     select find_workgroup_by_id((created_workgroup->>'id')::uuid) into selected_workgroup;
     assert json_array_length(selected_workgroup->'members') = 1, 'Workgroup must have members';
 
+    perform delete_workgroup((created_workgroup->>'id')::uuid);
+    select find_workgroup_by_id((created_workgroup->>'id')::uuid) into selected_workgroup;
+    assert selected_workgroup is null, 'Workgroup must be null after deleted';
+    select m into members from find_workgroup_members((created_workgroup->>'id')::uuid) m;
+    assert json_array_length(members) = 0, 'The members count must be equal to 0 on deleted workgroup';
+
     rollback;
     raise notice 'workgroup test pass';
 end