72 lines
1.1 KiB
Go
72 lines
1.1 KiB
Go
package storage
|
|
|
|
import (
|
|
"errors"
|
|
"sort"
|
|
"time"
|
|
|
|
"go-mod.ewintr.nl/planner/item"
|
|
)
|
|
|
|
var (
|
|
ErrNotFound = errors.New("not found")
|
|
)
|
|
|
|
type LocalID interface {
|
|
FindAll() (map[string]int, error)
|
|
FindOrNext(id string) (int, error)
|
|
Next() (int, error)
|
|
Store(id string, localID int) error
|
|
Delete(id string) error
|
|
}
|
|
|
|
type Sync interface {
|
|
FindAll() ([]item.Item, error)
|
|
Store(i item.Item) error
|
|
DeleteAll() error
|
|
LastUpdate() (time.Time, error)
|
|
}
|
|
|
|
type Event interface {
|
|
Store(event item.Event) error
|
|
Find(id string) (item.Event, error)
|
|
FindAll() ([]item.Event, error)
|
|
Delete(id string) error
|
|
}
|
|
|
|
func NextLocalID(used []int) int {
|
|
if len(used) == 0 {
|
|
return 1
|
|
}
|
|
|
|
sort.Ints(used)
|
|
usedMax := 1
|
|
for _, u := range used {
|
|
if u > usedMax {
|
|
usedMax = u
|
|
}
|
|
}
|
|
|
|
var limit int
|
|
for limit = 1; limit <= len(used) || limit < usedMax; limit *= 10 {
|
|
}
|
|
|
|
newId := used[len(used)-1] + 1
|
|
if newId < limit {
|
|
return newId
|
|
}
|
|
|
|
usedMap := map[int]bool{}
|
|
for _, u := range used {
|
|
usedMap[u] = true
|
|
}
|
|
|
|
for i := 1; i < limit; i++ {
|
|
if _, ok := usedMap[i]; !ok {
|
|
return i
|
|
}
|
|
}
|
|
|
|
return limit
|
|
}
|