fix: backend dynamic bill array usage

lib/bill-math.js

@@ -16,6 +16,8 @@ exports.makeChange = function makeChange (cassettes, amount) {
   }))
   const amountNum = amount.toNumber()
 
+  console.log('cassettes', cassettes)
+
   const sortedCassettes = _.orderBy(cassetteMap, ['denomination'], ['desc'])
 
   const finalDist = []

lib/cash-out/cash-out-actions.js

@@ -37,22 +37,14 @@ function mapDispense (tx) {
 
   if (_.isEmpty(bills)) return {}
 
-  return {
-    provisioned_1: bills[0].provisioned,
-    provisioned_2: bills[1].provisioned,
-    provisioned_3: bills[2].provisioned,
-    provisioned_4: bills[3].provisioned,
-    dispensed_1: bills[0].dispensed,
-    dispensed_2: bills[1].dispensed,
-    dispensed_3: bills[2].dispensed,
-    dispensed_4: bills[3].dispensed,
-    rejected_1: bills[0].rejected,
-    rejected_2: bills[1].rejected,
-    rejected_3: bills[2].rejected,
-    rejected_4: bills[3].rejected,
-    denomination_1: bills[0].denomination,
-    denomination_2: bills[1].denomination,
-    denomination_3: bills[2].denomination,
-    denomination_4: bills[3].denomination
-  }
+  const res = {}
+
+  _.forEach(it => {
+    res[`provisioned_${it + 1}`] = bills[it].provisioned
+    res[`denomination_${it + 1}`] = bills[it].denomination
+    res[`dispensed_${it + 1}`] = bills[it].dispensed
+    res[`rejected_${it + 1}`] = bills[it].rejected
+  }, _.times(_.identity(), _.size(bills)))
+
+  return res
 }

lib/cash-out/cash-out-atomic.js

@@ -111,20 +111,24 @@ function updateCassettes (t, tx) {
   if (!dispenseOccurred(tx.bills)) return Promise.resolve()
 
   const sql = `update devices set
-  cassette1 = cassette1 - $1,
-  cassette2 = cassette2 - $2,
-  cassette3 = cassette3 - $3,
-  cassette4 = cassette4 - $4
-  where device_id = $5
-  returning cassette1, cassette2, cassette3, cassette4`
+  ${_.size(tx.bills) > 0 ? `cassette1 = cassette1 - $1` : ``}
+  ${_.size(tx.bills) > 1 ? `, cassette2 = cassette2 - $2` : ``}
+  ${_.size(tx.bills) > 2 ? `, cassette3 = cassette3 - $3` : ``}
+  ${_.size(tx.bills) > 3 ? `, cassette4 = cassette4 - $4` : ``}
+  where device_id = $${_.size(tx.bills) + 1}
+  returning
+  ${_.size(tx.bills) > 0 ? `cassette1` : ``}
+  ${_.size(tx.bills) > 1 ? `, cassette2`: ``}
+  ${_.size(tx.bills) > 2 ? `, cassette3` : ``}
+  ${_.size(tx.bills) > 3 ? `, cassette4` : ``}`
 
-  const values = [
-    tx.bills[0]?.dispensed ?? 0 + tx.bills[0]?.rejected ?? 0,
-    tx.bills[1]?.dispensed ?? 0 + tx.bills[1]?.rejected ?? 0,
-    tx.bills[2]?.dispensed ?? 0 + tx.bills[2]?.rejected ?? 0,
-    tx.bills[3]?.dispensed ?? 0 + tx.bills[3]?.rejected ?? 0,
-    tx.deviceId
-  ]
+  const values = []
+
+  _.forEach(it => values.push(
+    tx.bills[it].dispensed + tx.bills[it].rejected
+  ), _.times(_.identity(), _.size(tx.bills)))
+
+  values.push(tx.deviceId)
 
   return t.one(sql, values)
     .then(r => socket.emit(_.assign(r, {op: 'cassetteUpdate', deviceId: tx.deviceId})))

lib/cash-out/cash-out-helper.js

@@ -37,7 +37,6 @@ function convertField (key) {
 
 function addDbBills (tx) {
   const bills = tx.bills
-  console.log('tx', tx)
   if (_.isEmpty(bills)) return tx
 
   const billsObj = {
@@ -55,7 +54,6 @@ function addDbBills (tx) {
 }
 
 function toDb (tx) {
-  console.log('tx1', tx)
   const massager = _.flow(convertBigNumFields, addDbBills,
     _.omit(['direction', 'bills']), _.mapKeys(convertField))
 
@@ -89,7 +87,7 @@ function toObj (row) {
   if (_.every(_.isNil, _.at(billFields, newObj))) return newObj
   if (_.some(_.isNil, _.at(billFields, newObj))) throw new Error('Missing cassette values')
 
-  const bills = [
+  const billFieldsArr = [
     {
       denomination: newObj.denomination1,
       provisioned: newObj.provisioned1
@@ -108,6 +106,10 @@ function toObj (row) {
     }
   ]
 
+  // There can't be bills with denomination === 0.
+  // If a bill has denomination === 0, then that cassette is not set and should be filtered out.
+  const bills = _.filter(it => it.denomination > 0, billFieldsArr)
+
   return _.set('bills', bills, _.omit(billFields, newObj))
 }
 

lib/cash-out/cash-out-tx.js

@@ -70,25 +70,12 @@ function postProcess (txVector, justAuthorized, pi) {
         return bills
       })
       .then(bills => {
-        const provisioned1 = bills[0].provisioned
-        const provisioned2 = bills[1].provisioned
-        const provisioned3 = bills[2].provisioned
-        const provisioned4 = bills[3].provisioned
-        const denomination1 = bills[0].denomination
-        const denomination2 = bills[1].denomination
-        const denomination3 = bills[2].denomination
-        const denomination4 = bills[3].denomination
+        const rec = {}
 
-        const rec = {
-          provisioned_1: provisioned1,
-          provisioned_2: provisioned2,
-          provisioned_3: provisioned3,
-          provisioned_4: provisioned4,
-          denomination_1: denomination1,
-          denomination_2: denomination2,
-          denomination_3: denomination3,
-          denomination_4: denomination4
-        }
+        _.forEach(it => {
+          rec[`provisioned_${it + 1}`] = bills[it].provisioned
+          rec[`denomination_${it + 1}`] = bills[it].denomination
+        }, _.times(_.identity(), _.size(bills)))
 
         return cashOutActions.logAction(db, 'provisionNotes', rec, newTx)
           .then(_.constant({bills}))