Fix(routing): add protections against malformed data

common/utils/get-first-challenge.js

@@ -0,0 +1,44 @@
+import emptyProtector from '../app/utils/empty-protector';
+
+export function checkMapData(
+  {
+    entities: {
+      challenge,
+      block,
+      superBlock,
+      challengeIdToName
+    },
+    result
+  }
+) {
+  if (
+    !challenge ||
+    !block ||
+    !superBlock ||
+    !challengeIdToName ||
+    !result ||
+    !result.length
+  ) {
+    throw new Error(
+      'entities not found, db may not be properly seeded. Crashing hard'
+    );
+  }
+}
+// getFirstChallenge(
+//   map: {
+//     entities: { challenge: Object, block: Object, superBlock: Object },
+//     result: [...superBlockDashedName: String]
+//   }
+// ) => Challenge|Void
+export function getFirstChallenge({
+  entities: { superBlock, block, challenge },
+  result
+}) {
+  return challenge[
+    emptyProtector(block[
+      emptyProtector(superBlock[
+        result[0]
+      ]).blocks[0]
+    ]).challenges[0]
+  ];
+}