dev: delete

src/main/kotlin/org/openmbee/flexo/mms/Conditions.kt

@@ -163,6 +163,10 @@ val LOCK_UPDATE_CONDITIONS = LOCK_CRUD_CONDITIONS.append {
     permit(Permission.UPDATE_LOCK, Scope.LOCK)
 }
 
+val SCRATCH_DELETE_CONDITIONS = REPO_CRUD_CONDITIONS.append {
+    permit(Permission.DELETE_SCRATCH, Scope.SCRATCH)
+}
+
 enum class ConditionType {
     INSPECT,
     REQUIRE,

src/main/kotlin/org/openmbee/flexo/mms/UserQuery.kt

@@ -40,7 +40,7 @@ suspend fun AnyLayer1Context.processAndSubmitUserQuery(queryRequest: SparqlQuery
         prefixes["mor"] -> {
             "${prefixes["mor-graph"]}Metadata"
         }
-        "${prefixes["mor-graph"]}Scratch" -> {
+        "${prefixes["mor-graph"]}Scratch.$scratchId" -> {
             refIri
         }
         else -> {
@@ -474,3 +474,27 @@ suspend fun Layer1Context<GspRequest, *>.loadGraph(loadGraphUri: String) {
         }
     }
 }
+
+/**
+ * Takes a Graph Store Protocol delete request and forwards it to Layer 0, optionally providing custom WHERE pattern
+ */
+suspend fun Layer1Context<GspRequest, *>.deleteGraph(deleteGraphUri: String, where: (WhereBuilder.() -> Unit)?) {
+    // create update string
+    val deleteUpdateString = buildSparqlUpdate {
+        delete {
+            graph(escapeIri(deleteGraphUri)) {
+                raw("?s ?p ?o")
+            }
+        }
+        where {
+            where?.let { it() }
+
+            graph(escapeIri(deleteGraphUri)) {
+                raw("?s ?p ?o")
+            }
+        }
+    }
+
+    // execute update
+    executeSparqlUpdate(deleteUpdateString)
+}

src/main/kotlin/org/openmbee/flexo/mms/routes/Scratches.kt

@@ -124,10 +124,19 @@ fun Route.crudScratch() {
 //
 //        }
 
-//        // 5.4 DELETE: delete
-//        delete {
-//
-//        }
+        // 5.4 DELETE: delete (drop)
+        delete {
+            // delete the graph
+            deleteGraph("${prefixes["mor-graph"]}Scratch.$scratchId") {
+                // permissions check
+                graph("mor-graph:Metadata") {
+                    auth(Permission.DELETE_SCRATCH.scope.id, SCRATCH_DELETE_CONDITIONS)
+                }
+            }
+
+            // close response
+            call.respondText("", status = HttpStatusCode.NoContent)
+        }
 
         otherwiseNotAllowed("store scratch")
     }

src/main/kotlin/org/openmbee/flexo/mms/server/GraphStore.kt

@@ -101,6 +101,11 @@ class GspPutResponse(requestContext: GenericRequest): GspMutateResponse(requestC
  */
 class GspPatchResponse(requestContext: GenericRequest): GspMutateResponse(requestContext)
 
+/**
+ * Response context for DELETE to graph
+ */
+class GspDeleteResponse(requestContext: GenericRequest): GspMutateResponse(requestContext)
+
 
 /**
  * A Graph Store Protocol (GSP) endpoint
@@ -227,6 +232,11 @@ class GraphStoreProtocolRoute<TRequestContext: GenericRequest>(
             SparqlUpdateRequest(call, updateString)
         }
     }
+
+    // DELETE
+    fun delete(body: Layer1Handler<TRequestContext, GspDeleteResponse>) {
+        super.delete(body, { GspDeleteResponse(it) }, null)
+    }
 }
 
 /**