Filter dates that expire soon

index.js

@@ -1,12 +1,17 @@
 
 
-module.exports = (arr, limit) => {
-  const obj = { valid: [], expired: [] }
+module.exports = (arr, limit, soon = 0) => {
+  const obj = { valid: [], expired: [], soon: []}
   limit = parse(limit)
   arr.map(time => {
     time = parse(time)
-    if (time < limit) obj.valid.push(time)
-    else obj.expired.push(time)
+    if (time < limit) {
+      if ((limit - soon) <= time && time < limit) {
+        obj.soon.push(time)
+      } else {
+        obj.valid.push(time)
+      }
+    } else obj.expired.push(time)
   })
   return obj
 }

test/runout.js

@@ -6,7 +6,7 @@ const test = require('tape')
 const runout = require('..')
 
 
-test('should sort dates with given expiration limit', assert => {
+test('should extract valid and expired dates from a given expiration limit', assert => {
   assert.plan(1)
   const obj = runout([
     new Date('01-01-2000').getTime(),
@@ -15,7 +15,8 @@ test('should sort dates with given expiration limit', assert => {
   ], new Date('01-01-2101').getTime())
   assert.deepEqual(obj, {
     valid: [946710000000, 4102470000000],
-    expired: [10413817200000]
+    expired: [10413817200000],
+    soon: []
   })
 })
 
@@ -29,7 +30,8 @@ test('should convert dates in ms', assert => {
   ], new Date('01-01-2101'))
   assert.deepEqual(obj, {
     valid: [946710000000, 4102470000000],
-    expired: [10413817200000]
+    expired: [10413817200000],
+    soon: []
   })
 })
 
@@ -43,6 +45,28 @@ test('should convert date strings into ms and sort them', assert => {
   ], '01-01-2101')
   assert.deepEqual(obj, {
     valid: [946710000000, 4102470000000],
-    expired: [10413817200000]
+    expired: [10413817200000],
+    soon: []
   })
 })
+
+
+test('should extract dates that expire soon', assert => {
+  assert.plan(1)
+  const obj = runout([
+    new Date('01-01-2000'),
+    new Date('01-01-2100'),
+    new Date('12-06-2100'),
+    new Date('01-01-2300'),
+  ], new Date('01-01-2101'), oneyear())
+  assert.deepEqual(obj, {
+    valid: [946710000000],
+    expired: [10413817200000],
+    soon: [4102470000000, 4131759600000]
+  })
+})
+
+
+function oneyear () {
+  return 1000 * 60 * 60 * 24 * 365
+}