fix: catch metaculus errors

Current code isn't particularly resilient
to API changes.

src/backend/platforms/metaculus/api.ts

@@ -211,15 +211,17 @@ const fetchAndValidate = async <T = unknown>(
   url: string,
   validator: ValidateFunction<T>
 ): Promise<T> => {
-  console.log(url);
+  // console.log(url);
   const data = await fetchWithRetries<object>(url);
   if (validator(data)) {
     return data;
-  }
+  }else{
+    console.log(data)
     throw new Error(
       `Response validation for url ${url} failed: ` +
-      JSON.stringify(validator.errors)
+        JSON.stringify(validator.errors, null, 4)
     );
+  }
 };
 
 export async function fetchApiQuestions(

src/backend/platforms/metaculus/index.ts

@@ -1,3 +1,4 @@
+import Error from "next/error";
 import {FetchedQuestion, Platform} from "..";
 import {average} from "../../../utils";
 import {sleep} from "../../utils/sleep";
@@ -7,16 +8,14 @@ import {
   ApiPredictable,
   ApiQuestion,
   fetchApiQuestions,
-  fetchSingleApiQuestion,
+  fetchSingleApiQuestion
 } from "./api";
 
 const platformName = "metaculus";
 const now = new Date().toISOString();
 const SLEEP_TIME = 1000;
 
-async function apiQuestionToFetchedQuestions(
+async function apiQuestionToFetchedQuestions(apiQuestion: ApiQuestion): Promise<FetchedQuestion[]> {
-  apiQuestion: ApiQuestion
-): Promise<FetchedQuestion[]> {
   // one item can expand:
   // - to 0 questions if we don't want it;
   // - to 1 question if it's a simple forecast
@@ -32,9 +31,8 @@ async function apiQuestionToFetchedQuestions(
     return false;
   };
 
-  const buildFetchedQuestion = (
+  const buildFetchedQuestion = (q : ApiPredictable & ApiCommon) : Omit < FetchedQuestion,
-    q: ApiPredictable & ApiCommon
+    "url" | "description" | "title" > => {
-  ): Omit<FetchedQuestion, "url" | "description" | "title"> => {
       const isBinary = q.possibilities.type === "binary";
       let options: FetchedQuestion["options"] = [];
       if (isBinary) {
@@ -44,30 +42,31 @@ async function apiQuestionToFetchedQuestions(
             {
               name: "Yes",
               probability: probability,
-            type: "PROBABILITY",
+              type: "PROBABILITY"
-          },
+            }, {
-          {
               name: "No",
               probability: 1 - probability,
-            type: "PROBABILITY",
+              type: "PROBABILITY"
             },
           ];
         }
       }
       return {
-      id: `${platformName}-${q.id}`,
+          id: `${platformName}-${
+          q.id
+        }`,
         options,
         qualityindicators: {
-        numforecasts: q.number_of_predictions,
+          numforecasts: q.number_of_predictions
         },
         extra: {
           resolution_data: {
             publish_time: apiQuestion.publish_time,
             resolution: apiQuestion.resolution,
             close_time: apiQuestion.close_time,
-          resolve_time: apiQuestion.resolve_time,
+            resolve_time: apiQuestion.resolve_time
-        },
+          }
-      },
+        }
       };
     };
 
@@ -77,44 +76,64 @@ async function apiQuestionToFetchedQuestions(
     if (apiQuestionDetails.type !== "group") {
       throw new Error("Expected `group` type"); // shouldn't happen, this is mostly for typescript
     }
-    return (apiQuestionDetails.sub_questions || [])
+      try{
-      .filter((q) => !skip(q))
+        let result = (apiQuestionDetails.sub_questions || []).filter((q) => ! skip(q)).map((sq) => {
-      .map((sq) => {
           const tmp = buildFetchedQuestion(sq);
           return {
             ... tmp,
-          title: `${apiQuestion.title} (${sq.title})`,
+            title: `${
+              apiQuestion.title
+            } (${
+              sq.title
+            })`,
             description: apiQuestionDetails.description || "",
-          url: `https://www.metaculus.com${apiQuestion.page_url}?sub-question=${sq.id}`,
+            url: `https://www.metaculus.com${
+              apiQuestion.page_url
+            }?sub-question=${
+              sq.id
+            }`
           };
         });
+        return result
+      }catch(error){
+        console.log(error)
+        return []
+      }
   } else if (apiQuestion.type === "forecast") {
     if (apiQuestion.group) {
       return []; // sub-question, should be handled on the group level
     }
     if (skip(apiQuestion)) {
+      console.log(`- [Skipping]: ${
+        apiQuestion.title
+      }`)
+      /*console.log(`Close time: ${
+        apiQuestion.close_time
+      }, resolve time: ${
+        apiQuestion.resolve_time
+      }`)*/
       return [];
     }
 
     await sleep(SLEEP_TIME);
     const apiQuestionDetails = await fetchSingleApiQuestion(apiQuestion.id);
+    try{
       const tmp = buildFetchedQuestion(apiQuestion);
-    return [
+      return [{
-      {
           ... tmp,
           title: apiQuestion.title,
           description: apiQuestionDetails.description || "",
-        url: "https://www.metaculus.com" + apiQuestion.page_url,
+          url: "https://www.metaculus.com" + apiQuestion.page_url
-      },
+        },];
-    ];
+    }catch(error){
+      console.log(error)
+      return []
+    }
   } else {
-    if (apiQuestion.type !== "claim") {
+    if (apiQuestion.type !== "claim") { // should never happen, since `discriminator` in JTD schema causes a strict runtime check
-      // should never happen, since `discriminator` in JTD schema causes a strict runtime check
+      console.log(`Unknown metaculus question type: ${
-      console.log(
-        `Unknown metaculus question type: ${
         (apiQuestion as any).type
-        }, skipping`
+      }, skipping`);
-      );
     }
     return [];
   }
@@ -125,19 +144,19 @@ export const metaculus: Platform<"id" | "debug"> = {
   label: "Metaculus",
   color: "#006669",
   version: "v2",
-  fetcherArgs: ["id", "debug"],
+  fetcherArgs: [
+    "id", "debug"
+  ],
   async fetcher(opts) {
     let allQuestions: FetchedQuestion[] = [];
 
     if (opts.args ?. id) {
+      console.log("Using optional id arg.")
       const id = Number(opts.args.id);
       const apiQuestion = await fetchSingleApiQuestion(id);
       const questions = await apiQuestionToFetchedQuestions(apiQuestion);
       console.log(questions);
-      return {
+      return {questions, partial: true};
-        questions,
-        partial: true,
-      };
     }
 
     let next: string |null = "https://www.metaculus.com/api2/questions/";
@@ -148,13 +167,16 @@ export const metaculus: Platform<"id" | "debug"> = {
       await sleep(SLEEP_TIME);
       const apiQuestions: ApiMultipleQuestions = await fetchApiQuestions(next);
       const results = apiQuestions.results;
-
+      // console.log(results)
       let j = false;
 
       for (const result of results) {
         const questions = await apiQuestionToFetchedQuestions(result);
+        // console.log(questions)
         for (const question of questions) {
-          console.log(`- ${question.title}`);
+          console.log(`- ${
+            question.title
+          }`);
           if ((! j && i % 20 === 0) || opts.args ?. debug) {
             console.log(question);
             j = true;
@@ -167,20 +189,16 @@ export const metaculus: Platform<"id" | "debug"> = {
       i += 1;
     }
 
-    return {
+    return {questions: allQuestions, partial: false};
-      questions: allQuestions,
-      partial: false,
-    };
   },
 
   calculateStars(data) {
     const {numforecasts} = data.qualityindicators;
-    const nuno = () =>
+    const nuno = () => (numforecasts || 0) > 300 ? 4 : (numforecasts || 0) > 100 ? 3 : 2;
-      (numforecasts || 0) > 300 ? 4 : (numforecasts || 0) > 100 ? 3 : 2;
     const eli = () => 3;
     const misha = () => 3;
     const starsDecimal = average([nuno(), eli(), misha()]);
     const starsInteger = Math.round(starsDecimal);
     return starsInteger;
-  },
+  }
 };