Merge pull request tone-row#41 from tone-row/multiple-edges-between-nodes

Show multiple edges between nodes

Author: rob-gordon

src/App.tsx

@@ -363,9 +363,17 @@ function parseText(text: string) {
       if (parent) {
         const source = getNodeId(lines[checkLine - 1], checkLine);
         const target = linkMatch ? linkMatch : getNodeId(line, lineNumber);
+
+        // Find a unique id
+        let id = `${source}_${target}:0`;
+        while (elements.map(({ data: { id } }) => id).includes(id)) {
+          let [, count] = id.split(":");
+          count = (parseInt(count, 10) + 1).toString();
+          id = `${source}_${target}:${count}`;
+        }
         elements.push({
           data: {
-            id: [source, target].join("_"),
+            id,
             source,
             target,
             label: getEdgeLabel(line),