1 files changed, 59 insertions, 0 deletions
diff --git a/srv/src/post/date.go b/srv/src/post/date.go
new file mode 100644
index 0000000..34fe109
--- /dev/null
+++ b/srv/src/post/date.go
@@ -0,0 +1,59 @@
+package post
+
+import (
+	"database/sql/driver"
+	"fmt"
+	"time"
+)
+
+// Date represents a calendar date with no timezone information attached.
+type Date struct {
+	Year  int
+	Month time.Month
+	Day   int
+}
+
+// DateFromTime converts a Time into a Date, truncating all non-date
+// information.
+func DateFromTime(t time.Time) Date {
+	t = t.UTC()
+	return Date{
+		Year:  t.Year(),
+		Month: t.Month(),
+		Day:   t.Day(),
+	}
+}
+
+// ToTime converts a Date into a Time. The returned time will be UTC midnight of
+// the Date.
+func (d *Date) ToTime() time.Time {
+	return time.Date(d.Year, d.Month, d.Day, 0, 0, 0, 0, time.UTC)
+}
+
+// Scan implements the sql.Scanner interface.
+func (d *Date) Scan(src interface{}) error {
+
+	if src == nil {
+		*d = Date{}
+		return nil
+	}
+
+	ts, ok := src.(int64)
+
+	if !ok {
+		return fmt.Errorf("cannot scan value %#v into Date", src)
+	}
+
+	*d = DateFromTime(time.Unix(ts, 0))
+	return nil
+}
+
+// Value implements the driver.Valuer interface.
+func (d Date) Value() (driver.Value, error) {
+
+	if d == (Date{}) {
+		return nil, nil
+	}
+
+	return d.ToTime().Unix(), nil
+}