feature #23: create route for citizen

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

@@ -0,0 +1,41 @@
+package fr.dcproject.repository
+
+import fr.postgresjson.connexion.Paginated
+import fr.postgresjson.connexion.Requester
+import fr.postgresjson.repository.RepositoryI
+import fr.postgresjson.repository.RepositoryI.Direction
+import net.pearx.kasechange.toSnakeCase
+import java.util.*
+import fr.dcproject.entity.Citizen as CitizenEntity
+
+class Citizen(override var requester: Requester) : RepositoryI<CitizenEntity> {
+    override val entityName = CitizenEntity::class
+
+    fun findById(id: UUID): CitizenEntity? {
+        val function = requester.getFunction("find_citizen_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
+    ): Paginated<CitizenEntity> {
+        return requester
+            .getFunction("find_citizens")
+            .select(
+                page, limit,
+                "sort" to sort?.toSnakeCase(),
+                "direction" to direction,
+                "search" to search
+            )
+    }
+
+    fun upsert(citizen: CitizenEntity): CitizenEntity? {
+        return requester
+            .getFunction("upsert_citizen")
+            .selectOne("resource" to citizen)
+    }
+}