feat: remove old failed QR scans

lib/poller.js

@@ -1,3 +1,5 @@
+const fs = require('fs/promises')
+const path = require('path')
 const _ = require('lodash/fp')
 const Queue = require('queue-promise')
 const plugins = require('./plugins')
@@ -31,6 +33,7 @@ const RADAR_UPDATE_INTERVAL = 5 * T.minutes
 const PRUNE_MACHINES_HEARTBEAT = 1 * T.day
 const TRANSACTION_BATCH_LIFECYCLE = 20 * T.minutes
 const TICKER_RATES_INTERVAL = 59 * T.seconds
+const FAILED_SCANS_INTERVAL = 1 * T.day
 
 const CHECK_NOTIFICATION_INTERVAL = 20 * T.seconds
 const PENDING_INTERVAL = 10 * T.seconds
@@ -39,6 +42,8 @@ const CACHE_ENTRY_TTL = 3600 // seconds
 const FAST_QUEUE_WAIT = 1 * T.seconds
 const SLOW_QUEUE_WAIT = 10 * T.seconds
 
+const OPERATOR_DATA_DIR = process.env.OPERATOR_DATA_DIR
+
 const FAST_QUEUE = new Queue({
   concurrent: 600,
   interval: FAST_QUEUE_WAIT
@@ -127,6 +132,28 @@ function updateCoinAtmRadar () {
     .then(rates => coinAtmRadar.update(rates, settings()))
 }
 
+const cleanOldFailedScans = () => {
+  const old = new Date()
+  old.setDate(old.getDate() - 2) // 2 days ago
+  const isOld = filepath => {
+    const then = new Date(path.basename(filepath).replace(/-[0-9]+\.jpg$/, ''))
+    return then < old
+  }
+  const baseDirPath = path.join(OPERATOR_DATA_DIR, 'failedQRScans')
+  fs.readdir(baseDirPath)
+    .then(machines => Promise.all(
+      machines.map(
+        machine => {
+          const machineDirPath = path.join(baseDirPath, machine)
+          return fs.readdir(machineDirPath)
+            .then(fnames => fnames.map(fname => path.join(machineDirPath, fname)))
+        }
+      )
+    ))
+    .then(_.flatten)
+    .then(filepaths => Promise.all(filepaths.filter(isOld).map(fs.unlink)))
+}
+
 function initializeEachSchema (schemas = ['public']) {
   // for each schema set "thread variables" and do polling
   return _.forEach(schema => {
@@ -206,6 +233,7 @@ function doPolling (schema) {
   addToQueue(updateAndLoadSanctions, SANCTIONS_UPDATE_INTERVAL, schema, QUEUE.SLOW)
   addToQueue(updateCoinAtmRadar, RADAR_UPDATE_INTERVAL, schema, QUEUE.SLOW)
   addToQueue(pi().pruneMachinesHeartbeat, PRUNE_MACHINES_HEARTBEAT, schema, QUEUE.SLOW, settings)
+  addToQueue(cleanOldFailedScans, FAILED_SCANS_INTERVAL, schema, QUEUE.SLOW, settings)
 }
 
 function setup (schemasToAdd = [], schemasToRemove = []) {