fix infinte loop when no events are upcoming

src/scrape.js

@@ -3,6 +3,7 @@ const { pathOr, unionWith, prop, eqBy, maxBy } = require('ramda');
 const url = require('url');
 const path = require('path');
 const fs = require('fs').promises;
+const filesystem = require('fs');
 const gm = require('gm').subClass({ imageMagick: true });
 
 const { graphql_endpoint } = require('./constants');
@@ -13,6 +14,8 @@ const get_upcoming_events = pathOr(
   'data.page.upcoming_events'.split('.'),
 );
 
+const get_past_events = pathOr(null, 'data.page.past_events'.split('.'));
+
 const merge_edges = unionWith(eqBy(prop('event_id')));
 
 const load_event = async (page, event_id) => {
@@ -154,6 +157,12 @@ const register_upcoming_events_listener = (endpoint, page) => {
               resolve(responses);
             }
           }
+          const past_events = get_past_events(json);
+          if (past_events !== null) {
+            if (!past_events.page_info.has_next_page) {
+              resolve(responses);
+            }
+          }
         } catch (err) {
           reject(err);
         }