Forgot this logic needed to be in a function and adds comments

src/utils/ingest.ts

@@ -463,12 +463,13 @@ export const ingestData = (raw: UnstructuredText): StructuredData | null => {
   return {genes, annotations, raw};
 };
 
+
 const { geneMap, annotations, groupedAnnotations } = readData();
 let mostRecentGeneMap = geneMap;
 let mostRecentAnnotations = annotations;
 let mostRecentGroupedAnnotations = groupedAnnotations;
 
-const updateData = () => {
+export const updateData = () => {
     const { execSync } = require("child_process");
     const stdout = execSync("wget http://current.geneontology.org/annotations/tair.gaf.gz ; gunzip tair.gaf.gz");
 
@@ -478,22 +479,27 @@ const updateData = () => {
     mostRecentGroupedAnnotations = groupedAnnotations;
 };
 
-let nextDate = new Date();
-if (nextDate.getMinutes() === 0 && nextDate.getSeconds() === 0) {
-    let interval = process.env["UPDATE_INTERVAL"];
-    if (interval) {
-        const runningInterval = setInterval(updateData, parseInt(interval));
+export const startPeriodicUpdates = () => {
+    let nextDate = new Date();
+    // Calls updateData daily, by default, if its the first minute of the day
+    if (nextDate.getMinutes() === 0) {
+        let interval = process.env["UPDATE_INTERVAL"];
+        if (interval) {
+            const runningInterval = setInterval(updateData, parseInt(interval));
+        } else {
+            const runningInterval = setInterval(updateData, (1000 * 60 * 60 * 24)); // Default interval is one day in ms
+        }
     } else {
-        const runningInterval = setInterval(updateData, (1000 * 60 * 60 * 24));
+        // Otherwise wait until the start of the next day to begin the periodic updates
+        nextDate.setDate(nextDate.getDate() + 1);
+        nextDate.setHours(0);
+        nextDate.setMinutes(0);
+        nextDate.setSeconds(0);
+        let difference = nextDate.getTime() - new Date().getTime();
+        setTimeout(startPeriodicUpdates, difference);
     }
-} else {
-    nextDate.setDate(nextDate.getDate() + 1);
-    nextDate.setHours(0);
-    nextDate.setMinutes(0);
-    nextDate.setSeconds(0);
-    let difference = nextDate.getTime() - new Date().getTime();
-    setTimeout(updateData, difference);
-}
+};
+startPeriodicUpdates();
 
 export const getGeneMap = (): GeneMap => { return mostRecentGeneMap; };