#29 Implement Workgroup (route, voter, repo, entity)

Create tests for workgroup routes
add CitizenWithUserI

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

@@ -0,0 +1,46 @@
+package fr.dcproject.repository
+
+import fr.dcproject.entity.CitizenRef
+import fr.dcproject.entity.WorkgroupSimple
+import fr.postgresjson.connexion.Paginated
+import fr.postgresjson.connexion.Requester
+import fr.postgresjson.entity.Parameter
+import fr.postgresjson.repository.RepositoryI
+import fr.postgresjson.repository.RepositoryI.Direction
+import net.pearx.kasechange.toSnakeCase
+import java.util.*
+import fr.dcproject.entity.Workgroup as WorkgroupEntity
+
+class Workgroup(override var requester: Requester) : RepositoryI {
+    fun findById(id: UUID): WorkgroupEntity? {
+        val function = requester.getFunction("find_workgroup_by_id")
+        return function.selectOne("id" to id)
+    }
+
+    fun find(
+        page: Int = 1,
+        limit: Int = 50,
+        sort: String? = null,
+        direction: Direction? = null,
+        search: String? = null,
+        filter: Filter = Filter()
+    ): Paginated<WorkgroupEntity> {
+        return requester
+            .getFunction("find_workgroups")
+            .select(
+                page, limit,
+                "sort" to sort?.toSnakeCase(),
+                "direction" to direction,
+                "search" to search,
+                "filter" to filter
+            )
+    }
+
+    fun upsert(workgroup: WorkgroupSimple<CitizenRef>): WorkgroupEntity = requester
+        .getFunction("upsert_workgroup")
+        .selectOne("resource" to workgroup) ?: error("query 'upsert_workgroup' return null")
+
+    class Filter(
+        val createdById: String? = null
+    ) : Parameter
+}