// GetAll fetches all operation from BoltDB storage.
func GetAll() (result []Operation) {
view(func(k, v []byte) {
op := &Operation{}
boltdb.DecodeValue(v, op, cfg.DataEncoding)
result = append(result, *op)
})
return
}
// FetchByDate attempts to fetch all operations, which are operated by user with
// username (or all users if username = "") and in time bounds beetween dateFrom and dateTo dates.
func FetchByDate(dateFrom, dateTo, username string) ([]Operation, error) {
result := []Operation{}
db, err := bolt.Open(cfg.BoltDB, dbMode, nil)
if err != nil {
return result, err
}
defer db.Close()
//halper func for parsing date and handling errors
parseTime := func(source string) (time.Time, error) {
t, err := time.Parse(TimeLayout, source)
if err != nil {
return t, err
}
return t, nil
}
from, err := parseTime(dateFrom)
if err != nil {
return result, err
}
to, err := parseTime(dateTo)
if err != nil {
return result, err
}
now, err := parseTime(time.Now().Format(TimeLayout))
if err != nil {
return result, err
}
if to.Equal(now) {
to = time.Now()
} else {
to = to.Add(24 * time.Hour)
}
db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(cfg.BucketForOperations))
c := b.Cursor()
for k, v := c.Seek([]byte(from.String())); k != nil && bytes.Compare(k, []byte(to.String())) <= 0; k, v = c.Next() {
//check username
if username != "" && !bytes.HasSuffix(k, []byte(username)) {
continue
}
op := &Operation{}
boltdb.DecodeValue(v, op, cfg.DataEncoding)
result = append(result, *op)
}
return nil
})
return result, nil
}