move sort to own file

src/logic.js

@@ -141,6 +141,18 @@ const has_past_events = (body) =>
 
 const merge_events = (a, b) => uniqBy(eqBy(prop('event_id')))(union(a, b));
 
+const by_date = (a, b) => {
+  const b_date = b.date.start;
+  const a_date = a.date.start;
+  if (a_date > b_date) {
+    return 1;
+  }
+  if (a_date == b_date) {
+    return 0;
+  }
+  return -1;
+};
+
 const event_date_to_date_obj = (event) => {
   const start = pathOr(null, ['date', 'start'], event);
   if (start !== null) {
@@ -155,6 +167,7 @@ const event_date_to_date_obj = (event) => {
 };
 
 module.exports = {
+  by_date,
   event_date_to_date_obj,
   get_body_inner_text,
   get_past_events_from_page,

src/scrape.js

@@ -1,4 +1,5 @@
 const {
+  by_date,
   event_date_to_date_obj,
   merge_events,
   parse_args,
@@ -39,17 +40,7 @@ const {
   let all_events = events
     .reduce(to_unique_events, previous_events)
     .map(event_date_to_date_obj)
-    .sort((a, b) => {
-      const b_date = b.date.start;
-      const a_date = a.date.start;
-      if (a_date > b_date) {
-        return 1;
-      }
-      if (a_date == b_date) {
-        return 0;
-      }
-      return -1;
-    });
+    .sort(by_date);
 
   if (output === null) {
     console.log(JSON.stringify(all_events));