feat(plugins/dates): past duration ranges

plugins/dates/src/api/parse/range/02-date-range.js

@@ -159,6 +159,32 @@ export default [
         end = end.applyShift({ day: -1 }).applyShift({ [duration]: 1 })
       }
 
+      return {
+        start: start,
+        end: end.end(),
+      }
+    },
+  },
+  {
+    // 2 to 4 weeks ago
+    match:
+      '[<min>#Value] to [<max>#Value] [<unit>(day|days|week|weeks|month|months|year|years)] (ago|before|earlier|prior)',
+    desc: '2 to 4 weeks ago',
+    parse: (m, context) => {
+      const { min, max, unit } = m.groups()
+
+      let start = new Unit(context.today, null, context)
+      let end = start.clone()
+
+      const duration = unit.text('implicit')
+      start = start.applyShift({ [duration]: -max.numbers().get()[0] })
+      end = end.applyShift({ [duration]: -min.numbers().get()[0] })
+
+      // Ensure that the end date is inclusive
+      if (!['day', 'days'].includes(duration)) {
+        end = end.applyShift({ day: 1 }).applyShift({ [duration]: -1 })
+      }
+
       return {
         start: start,
         end: end.end(),

plugins/dates/tests/duration-range.test.js

@@ -37,3 +37,29 @@ test('future duration-ranges', function (t) {
   })
   t.end()
 })
+
+test('past duration-ranges', function (t) {
+  durArr.forEach(obj => {
+    obj.text.forEach(text => {
+      const doc = nlp(`${text} ago`)
+      const { duration, start, end } = doc.dates(context).get()[0]
+      t.deepEqual(duration, obj.duration, text)
+      t.ok(start < context.today, 'start date')
+      t.ok(end > start, 'end date')
+    })
+  })
+  t.end()
+})
+
+test('past duration-ranges', function (t) {
+  durArr.forEach(obj => {
+    obj.text.forEach(text => {
+      const doc = nlp(`${text} ago`)
+      const { duration, start, end } = doc.dates(context).get()[0]
+      t.deepEqual(duration, obj.duration, text)
+      t.ok(start < context.today, 'start date')
+      t.ok(end > start, 'end date')
+    })
+  })
+  t.end()
+})