Implemented a recursive DFS.

graph-search/src/features/search/search.js

@@ -129,6 +129,19 @@ export function bestFirst(graph, source, destination) {
   return undefined;
 }
 
-export function recursiveDFS(graph, source, destination) {
-  return undefined; // TODO: stub
+export function recursiveDFS(graph, source, destination, visited = new Set()) {
+  if (visited.has(source)) {
+    return undefined;
+  }
+  visited.add(source);
+  if (source === destination) {
+    return [destination];
+  }
+  for (const incidence of graph.getIncidences(source)) {
+    const suffix = recursiveDFS(graph, incidence.destination, destination, visited);
+    if (suffix !== undefined) {
+      return [source, ...suffix];
+    }
+  }
+  return undefined;
 }

graph-search/src/features/search/solution.js

@@ -29,7 +29,7 @@ function formatSolution(solution) {
 }
 
 export function Solution(props) {
-  const search = bestFirst;
+  const search = recursiveDFS;
   const firstSolution = search(firstExample, 'a', 'd');
   const secondSolution = search(secondExample, '123', '321');
   return (