Add existing codebase

pkg/brainbuffer/appointment/entity.go

@@ -0,0 +1,27 @@
+package appointment
+
+import (
+	"brainbuffer/pkg/brainbuffer/scheduling"
+	"time"
+)
+
+type Status int
+
+const (
+	Overdue Status = iota
+	Upcoming
+	Missed
+	Completed
+)
+
+type Appointment struct {
+	ID                int64
+	TaskID            int64
+	Status            Status
+	SchedulingPattern scheduling.Pattern
+	Time              time.Time
+	DurationOffset    time.Duration
+	CreationTime      time.Time
+}
+
+type Appointments []*Appointment