shared memory edge validation added

Author: Rahuljagwani

src/config/defaultValidators.js

@@ -20,13 +20,36 @@ const nodeValidator = `(node, nodes, edges) => {
     }`;
 const edgeValidator = `(edge, nodes, edges) => {
 let message = { ok: true, err: null };
+let numEdge = "";
+for (let char of edge.label) {
+    if (!isNaN(parseInt(char))) {
+      numEdge += char;
+    } else if (numEdge !== "") {
+      break;
+    }
+}
 edges.forEach((e) => {
     if (e.label === edge.label && e.sourceLabel !== edge.sourceLabel) {
         message = {
             ok: false,
             err: 'Edge with same label exists.',
         };
     }
+    let numE = "";
+    for (let char of e.label) {
+        if (!isNaN(parseInt(char))) {
+        numE += char;
+        } else if (numE !== "") {
+        break;
+        }
+    }
+    if (numE === numEdge && numE != "0") {
+        message = {
+            ok: false,
+            err: '2 edges cannot have same prefixes if they are number',
+        };
+        return message;
+    }
 });
 return message;
 }`;