New probe for compacting JSONLD documents

inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/JsonLDCompactionProve.java

@@ -0,0 +1,63 @@
+package org.oneedtech.inspect.vc.probe;
+
+import java.io.StringReader;
+import java.net.URI;
+import java.util.Map;
+
+import org.oneedtech.inspect.core.probe.Probe;
+import org.oneedtech.inspect.core.probe.RunContext;
+import org.oneedtech.inspect.core.report.ReportItems;
+import org.oneedtech.inspect.vc.Credential;
+import org.oneedtech.inspect.vc.util.CachingDocumentLoader;
+
+import com.apicatalog.jsonld.JsonLd;
+import com.apicatalog.jsonld.JsonLdOptions;
+import com.apicatalog.jsonld.api.CompactionApi;
+import com.apicatalog.jsonld.document.JsonDocument;
+
+import jakarta.json.JsonObject;
+
+
+public class JsonLDCompactionProve extends Probe<Credential> {
+    private final String context;
+    private final Map<URI, String> localDomains;
+
+    public JsonLDCompactionProve(String context) {
+        this(context, null);
+    }
+
+    public JsonLDCompactionProve(String context, Map<URI, String> localDomains) {
+        super(ID);
+        this.context = context;
+        this.localDomains = localDomains;
+    }
+
+    @Override
+    public ReportItems run(Credential crd, RunContext ctx) throws Exception {
+		try {
+            // compact JSON
+            JsonDocument jsonDocument = JsonDocument.of(new StringReader(crd.getJson().toString()));
+            CompactionApi compactApi = JsonLd.compact(jsonDocument, context);
+            compactApi.options(new JsonLdOptions(new CachingDocumentLoader(localDomains)));
+            JsonObject compactedObject = compactApi.get();
+
+            // TODO: Handle mismatch between URL node source and declared ID.
+            if (compactedObject.get("id") != null && crd.getResource().getID() != null
+              && !compactedObject.get("id").toString().equals(crd.getResource().getID())) {
+
+                // TODO: warning!!
+                // report_message(
+                //     "Node fetched from source {} declared its id as {}".format(
+                //         task_meta['node_id'], node_id), MESSAGE_LEVEL_WARNING, success=False
+                // ),
+
+            }
+			return success(this, ctx);
+
+		} catch (Exception e) {
+			return fatal("Error while parsing credential: " + e.getMessage(), ctx);
+		}
+    }
+
+	public static final String ID = JsonLDCompactionProve.class.getSimpleName();
+}