Wire up new SparqlToSpinConverterNode

Author: benjaminaaron

server/src/main/java/org/foerderfunke/sem_ops_server/Controller.java

@@ -1,4 +1,5 @@
 package org.foerderfunke.sem_ops_server;
+import org.springframework.web.bind.annotation.CrossOrigin;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
@@ -8,8 +9,10 @@ public class Controller {
 
     Converter converter = new Converter();
 
-    @GetMapping("/sparqlToSpin")
-    public String sparqlToSpin(@RequestParam(name = "sparql") String sparql) {
+    @CrossOrigin(origins = "*")
+    @GetMapping(value = "/sparqlToSpin", produces = "text/turtle")
+    public String sparqlToSpin(@RequestParam String sparql) {
+        System.out.println("Received sparqlToSpin request");
         return converter.sparqlToSpin(sparql);
     }
 }

src/contextmenu.js

@@ -1,5 +1,3 @@
-// Adapted from ChatGPT
-
 const canvasCtxMenuItems = [
     {
         label: "Input",
@@ -53,6 +51,7 @@ const canvasCtxMenuItems = [
         submenu: [
             { label: "Turtle to JSON-LD", action: "TurtleToJsonLdConverterNode" },
             { label: "JSON-LD to Turtle", action: "JsonLdToTurtleConverterNode" },
+            { label: "SPARQL to SPIN", action: "SparqlToSpinConverterNode" },
         ]
     },
     {

src/graph/node/converter/SparqlToSpinConverterNode.js

@@ -0,0 +1,20 @@
+import { CodeNode } from "../CodeNode.js"
+import { PORT, TYPE } from "../../nodeFactory.js"
+
+export class SparqlToSpinConverterNode extends CodeNode {
+    constructor(initialValues, graph) {
+        super(initialValues, graph, [ PORT.SPARQL ], [ PORT.TURTLE ], TYPE.CONVERTER)
+    }
+
+    async processIncomingData() {
+        let sparql = this.incomingData[0].data
+        async function convert(sparql) {
+            const url = new URL("http://localhost:8080/sparqlToSpin")
+            url.searchParams.set("sparql", sparql)
+            const res = await fetch(url, { headers: { "Accept": "text/turtle" } })
+            if (!res.ok) throw new Error(`HTTP ${res.status}`)
+            return await res.text()
+        }
+        return await convert(sparql)
+    }
+}

src/graph/nodeFactory.js

@@ -25,6 +25,7 @@ import { JavaScriptExecNode } from "./node/processor/JavaScriptExecNode.js"
 import { TurtleToJsonLdConverterNode } from "./node/converter/TurtleToJsonLdConverterNode.js"
 import { JsonLdToTurtleConverterNode } from "./node/converter/JsonLdToTurtleConverterNode.js"
 import { JsonLdInputNode } from "./node/input/JsonLdInputNode.js"
+import { SparqlToSpinConverterNode } from "./node/converter/SparqlToSpinConverterNode.js"
 
 export const TYPE = {
     INPUT: 0,
@@ -79,7 +80,8 @@ const nodeClasses = {
     "JavaScriptInputNode": JavaScriptInputNode,
     "TurtleToJsonLdConverterNode": TurtleToJsonLdConverterNode,
     "JsonLdToTurtleConverterNode": JsonLdToTurtleConverterNode,
-    "JsonLdInputNode": JsonLdInputNode
+    "JsonLdInputNode": JsonLdInputNode,
+    "SparqlToSpinConverterNode": SparqlToSpinConverterNode
 }
 
 export const exampleData = {