forked from rodrigo-brito/ninjabot
/
buntdb.go
100 lines (82 loc) · 1.81 KB
/
buntdb.go
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package storage
import (
"encoding/json"
"log"
"strconv"
"sync/atomic"
"github.com/bengalm/ninjabot/model"
"github.com/tidwall/buntdb"
)
type Bunt struct {
lastID int64
db *buntdb.DB
}
func FromMemory() (Storage, error) {
return newBunt(":memory:")
}
func FromFile(file string) (Storage, error) {
return newBunt(file)
}
func newBunt(sourceFile string) (Storage, error) {
db, err := buntdb.Open(sourceFile)
if err != nil {
return nil, err
}
err = db.CreateIndex("update_index", "*", buntdb.IndexJSON("updated_at"))
if err != nil {
return nil, err
}
return &Bunt{
db: db,
}, nil
}
func (b *Bunt) getID() int64 {
return atomic.AddInt64(&b.lastID, 1)
}
func (b *Bunt) CreateOrder(order *model.Order) error {
return b.db.Update(func(tx *buntdb.Tx) error {
order.ID = b.getID()
content, err := json.Marshal(order)
if err != nil {
return err
}
_, _, err = tx.Set(strconv.FormatInt(order.ID, 10), string(content), nil)
return err
})
}
func (b Bunt) UpdateOrder(order *model.Order) error {
return b.db.Update(func(tx *buntdb.Tx) error {
id := strconv.FormatInt(order.ID, 10)
content, err := json.Marshal(order)
if err != nil {
return err
}
_, _, err = tx.Set(id, string(content), nil)
return err
})
}
func (b Bunt) Orders(filters ...OrderFilter) ([]*model.Order, error) {
orders := make([]*model.Order, 0)
err := b.db.View(func(tx *buntdb.Tx) error {
err := tx.Ascend("update_index", func(key, value string) bool {
var order model.Order
err := json.Unmarshal([]byte(value), &order)
if err != nil {
log.Println(err)
return true
}
for _, filter := range filters {
if ok := filter(order); !ok {
return true
}
}
orders = append(orders, &order)
return true
})
return err
})
if err != nil {
return nil, err
}
return orders, nil
}