mem test

item/event.go

@@ -52,6 +52,8 @@ func (e *EventBody) UnmarshalJSON(data []byte) error {
 
 type Event struct {
 	ID        string    `json:"id"`
+	Recurrer  *Recur    `json:"recurrer"`
+	RecurNext time.Time `json:"recurNext"`
 	EventBody
 }
 
@@ -66,6 +68,8 @@ func NewEvent(i Item) (Event, error) {
 	}
 
 	e.ID = i.ID
+	e.Recurrer = i.Recurrer
+	e.RecurNext = i.RecurNext
 
 	return e, nil
 }
@@ -83,6 +87,8 @@ func (e Event) Item() (Item, error) {
 	return Item{
 		ID:        e.ID,
 		Kind:      KindEvent,
+		Recurrer:  e.Recurrer,
+		RecurNext: e.RecurNext,
 		Body:      string(body),
 	}, nil
 }

item/item.go

@@ -22,6 +22,8 @@ type Item struct {
 	Kind      Kind      `json:"kind"`
 	Updated   time.Time `json:"updated"`
 	Deleted   bool      `json:"deleted"`
+	Recurrer  *Recur    `json:"recurrer"`
+	RecurNext time.Time `json:"recurNext"`
 	Body      string    `json:"body"`
 }
 

item/recur.go

@@ -10,9 +10,9 @@ const (
 )
 
 type Recur struct {
-	Start  time.Time
-	Period RecurPeriod
-	Count  int
+	Start  time.Time   `json:"start"`
+	Period RecurPeriod `json:"period"`
+	Count  int         `json:"count"`
 }
 
 func (r *Recur) On(date time.Time) bool {

sync/service/memory.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"slices"
 	"sync"
 	"time"
@@ -44,3 +45,34 @@ func (m *Memory) Updated(kinds []item.Kind, timestamp time.Time) ([]item.Item, e
 
 	return result, nil
 }
+
+func (m *Memory) RecursBefore(date time.Time) ([]item.Item, error) {
+	res := make([]item.Item, 0)
+	for _, i := range m.items {
+		if i.Recurrer == nil {
+			continue
+		}
+		if i.RecurNext.Before(date) {
+			res = append(res, i)
+		}
+	}
+	return res, nil
+}
+
+func (m *Memory) RecursNext(id string, date time.Time) error {
+	i, ok := m.items[id]
+	if !ok {
+		return ErrNotFound
+	}
+	if i.Recurrer == nil {
+		return ErrNotARecurrer
+	}
+	if !i.Recurrer.On(date) {
+		return fmt.Errorf("item does not recur on %v", date)
+	}
+	i.RecurNext = date
+	i.Updated = time.Now()
+	m.items[id] = i
+
+	return nil
+}

sync/service/memory_test.go

@@ -5,10 +5,11 @@ import (
 	"testing"
 	"time"
 
+	"github.com/google/go-cmp/cmp"
 	"go-mod.ewintr.nl/planner/item"
 )
 
-func TestMemoryItem(t *testing.T) {
+func TestMemoryUpdate(t *testing.T) {
 	t.Parallel()
 
 	mem := NewMemory()
@@ -109,3 +110,62 @@ func TestMemoryItem(t *testing.T) {
 		t.Errorf("exp %v, got %v", t1.ID, actItems[0].ID)
 	}
 }
+
+func TestMemoryRecur(t *testing.T) {
+	t.Parallel()
+
+	mem := NewMemory()
+	now := time.Now()
+	earlier := now.Add(-5 * time.Minute)
+	today := time.Date(2024, 12, 1, 0, 0, 0, 0, time.UTC)
+	yesterday := time.Date(2024, 11, 30, 0, 0, 0, 0, time.UTC)
+	tomorrow := time.Date(2024, 12, 2, 0, 0, 0, 0, time.UTC)
+
+	t.Log("start")
+	i1 := item.Item{
+		ID:      "a",
+		Updated: earlier,
+		Recurrer: &item.Recur{
+			Start:  yesterday,
+			Period: item.PeriodDay,
+			Count:  1,
+		},
+		RecurNext: yesterday,
+	}
+	i2 := item.Item{
+		ID:      "b",
+		Updated: earlier,
+	}
+
+	for _, i := range []item.Item{i1, i2} {
+		if err := mem.Update(i); err != nil {
+			t.Errorf("exp nil, ot %v", err)
+		}
+	}
+
+	t.Log("get recurrers")
+	rs, err := mem.RecursBefore(today)
+	if err != nil {
+		t.Errorf("exp nil, gt %v", err)
+	}
+	if diff := cmp.Diff([]item.Item{i1}, rs); diff != "" {
+		t.Errorf("(exp +, got -)\n%s", diff)
+	}
+
+	t.Log("set next")
+	if err := mem.RecursNext(i1.ID, tomorrow); err != nil {
+		t.Errorf("exp nil, got %v", err)
+	}
+
+	t.Log("check result")
+	us, err := mem.Updated([]item.Kind{}, now)
+	if err != nil {
+		t.Errorf("exp nil, got %v", err)
+	}
+	if len(us) != 1 {
+		t.Errorf("exp 1, got %v", len(us))
+	}
+	if us[0].ID != i1.ID {
+		t.Errorf("exp %v, got %v", i1.ID, us[0].ID)
+	}
+}

sync/service/storage.go

@@ -9,9 +9,15 @@ import (
 
 var (
 	ErrNotFound     = errors.New("not found")
+	ErrNotARecurrer = errors.New("not a recurrer")
 )
 
 type Syncer interface {
 	Update(item item.Item) error
 	Updated(kind []item.Kind, t time.Time) ([]item.Item, error)
 }
+
+type Recurrer interface {
+	RecursBefore(date time.Time) ([]item.Item, error)
+	RecursNext(id string, date time.Time) error
+}