Add support for showing tasks due the previous week.

This is useful for those who need a report of entries from last week.

2 files changed, 20 insertions, 0 deletions

diff --git a/todolist/date_filter.go b/todolist/date_filter.go
index b56f117..fb06682 100644
--- a/todolist/date_filter.go
+++ b/todolist/date_filter.go
@@ -45,6 +45,8 @@ func (f *DateFilter) FilterDate(input string) []*Todo {
 		return f.filterThisWeek(bod(time.Now()))
 	case match == "due next week":
 		return f.filterNextWeek(bod(time.Now()))
+	case match == "due last week":
+		return f.filterLastWeek(bod(time.Now()))
 	case match == "overdue":
 		return f.filterOverdue(bod(time.Now()))
 	}
@@ -130,6 +132,21 @@ func (f *DateFilter) filterNextWeek(pivot time.Time) []*Todo {
 	return ret
 }
 
+func (f *DateFilter) filterLastWeek(pivot time.Time) []*Todo {
+	var ret []*Todo
+
+	begin := f.FindSunday(pivot).AddDate(0, 0, -7)
+	end := begin.AddDate(0, 0, 7)
+
+	for _, todo := range f.Todos {
+		dueTime, _ := time.ParseInLocation("2006-01-02", todo.Due, f.Location)
+		if begin.Before(dueTime) && end.After(dueTime) {
+			ret = append(ret, todo)
+		}
+	}
+	return ret
+}
+
 func (f *DateFilter) filterOverdue(pivot time.Time) []*Todo {
 	var ret []*Todo
 
diff --git a/todolist/parser.go b/todolist/parser.go
index ca5083a..1f070c3 100644
--- a/todolist/parser.go
+++ b/todolist/parser.go
@@ -94,6 +94,9 @@ func (p *Parser) Due(input string, day time.Time) string {
 		return p.saturday(day)
 	case "sunday", "sun":
 		return p.sunday(day)
+	case "last week":
+		n := bod(time.Now())
+		return getNearestMonday(n).AddDate(0, 0, -7).Format("2006-01-02")
 	case "next week":
 		n := bod(time.Now())
 		return getNearestMonday(n).AddDate(0, 0, 7).Format("2006-01-02")