362 lines
8.1 KiB
Go
362 lines
8.1 KiB
Go
package boltease
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/boltdb/bolt"
|
|
)
|
|
|
|
// This is a library for easing the use of bolt dbs
|
|
|
|
// DB is a struct for accomplishing this
|
|
type DB struct {
|
|
filename string
|
|
boltDB *bolt.DB
|
|
mode os.FileMode
|
|
options *bolt.Options
|
|
dbIsOpen bool
|
|
}
|
|
|
|
// Create makes sure we can get open the file and returns the DB object
|
|
func Create(fn string, m os.FileMode, opts *bolt.Options) (*DB, error) {
|
|
var err error
|
|
b := DB{filename: fn, mode: m, options: opts}
|
|
b.boltDB, err = bolt.Open(fn, m, opts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer b.boltDB.Close()
|
|
return &b, nil
|
|
}
|
|
|
|
func (b *DB) OpenDB() error {
|
|
if b.dbIsOpen {
|
|
// DB is already open, that's fine.
|
|
return nil
|
|
}
|
|
var err error
|
|
if b.boltDB, err = bolt.Open(b.filename, b.mode, b.options); err != nil {
|
|
return err
|
|
}
|
|
b.dbIsOpen = true
|
|
return err
|
|
}
|
|
|
|
func (b *DB) CloseDB() error {
|
|
if !b.dbIsOpen {
|
|
// DB is already closed, that's fine.
|
|
return nil
|
|
}
|
|
var err error
|
|
if err = b.boltDB.Close(); err != nil {
|
|
return err
|
|
}
|
|
b.dbIsOpen = false
|
|
return err
|
|
}
|
|
|
|
// MkBucketPath builds all buckets in the string slice
|
|
func (b *DB) MkBucketPath(path []string) error {
|
|
var err error
|
|
if !b.dbIsOpen {
|
|
if err = b.OpenDB(); err != nil {
|
|
return err
|
|
}
|
|
defer b.CloseDB()
|
|
}
|
|
|
|
err = b.boltDB.Update(func(tx *bolt.Tx) error {
|
|
var err error
|
|
bkt := tx.Bucket([]byte(path[0]))
|
|
if bkt == nil {
|
|
// Create it
|
|
bkt, err = tx.CreateBucket([]byte(path[0]))
|
|
if err != nil {
|
|
// error creating
|
|
return err
|
|
}
|
|
}
|
|
if len(path) > 1 {
|
|
path = path[1:]
|
|
for i := range path {
|
|
nextBkt := bkt.Bucket([]byte(path[i]))
|
|
if nextBkt == nil {
|
|
// Create it
|
|
nextBkt, err = bkt.CreateBucket([]byte(path[i]))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
bkt = nextBkt
|
|
}
|
|
}
|
|
return err
|
|
})
|
|
return err
|
|
}
|
|
|
|
// GetValue returns the value at path
|
|
// path is a slice of strings
|
|
// key is the key to get
|
|
func (b *DB) GetValue(path []string, key string) (string, error) {
|
|
var err error
|
|
var ret string
|
|
if !b.dbIsOpen {
|
|
if err = b.OpenDB(); err != nil {
|
|
return ret, err
|
|
}
|
|
defer b.CloseDB()
|
|
}
|
|
err = b.boltDB.View(func(tx *bolt.Tx) error {
|
|
bkt := tx.Bucket([]byte(path[0]))
|
|
if bkt == nil {
|
|
return fmt.Errorf("Couldn't find bucket " + path[0])
|
|
}
|
|
for idx := 1; idx < len(path); idx++ {
|
|
bkt = bkt.Bucket([]byte(path[idx]))
|
|
if bkt == nil {
|
|
return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/"))
|
|
}
|
|
}
|
|
// newBkt should have the last bucket in the path
|
|
ret = string(bkt.Get([]byte(key)))
|
|
return nil
|
|
})
|
|
return ret, err
|
|
}
|
|
|
|
// SetValue sets the value of key at path to val
|
|
// path is a slice of tokens
|
|
func (b *DB) SetValue(path []string, key, val string) error {
|
|
var err error
|
|
if !b.dbIsOpen {
|
|
if err = b.OpenDB(); err != nil {
|
|
return err
|
|
}
|
|
defer b.CloseDB()
|
|
}
|
|
|
|
err = b.MkBucketPath(path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = b.boltDB.Update(func(tx *bolt.Tx) error {
|
|
bkt := tx.Bucket([]byte(path[0]))
|
|
if bkt == nil {
|
|
return fmt.Errorf("Couldn't find bucket " + path[0])
|
|
}
|
|
for idx := 1; idx < len(path); idx++ {
|
|
bkt, err = bkt.CreateBucketIfNotExists([]byte(path[idx]))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
// bkt should have the last bucket in the path
|
|
return bkt.Put([]byte(key), []byte(val))
|
|
})
|
|
return err
|
|
}
|
|
|
|
// GetInt returns the value at path
|
|
// If the value cannot be parsed as an int, error
|
|
func (b *DB) GetInt(path []string, key string) (int, error) {
|
|
var ret int
|
|
r, err := b.GetValue(path, key)
|
|
if err == nil {
|
|
ret, err = strconv.Atoi(r)
|
|
}
|
|
return ret, err
|
|
}
|
|
|
|
// SetInt Sets an integer value
|
|
func (b *DB) SetInt(path []string, key string, val int) error {
|
|
return b.SetValue(path, key, strconv.Itoa(val))
|
|
}
|
|
|
|
// GetBool returns the value at 'path'
|
|
// If the value cannot be parsed as a bool, error
|
|
// We check 'true/false' and '1/0', else error
|
|
func (b *DB) GetBool(path []string, key string) (bool, error) {
|
|
var ret bool
|
|
r, err := b.GetValue(path, key)
|
|
if err == nil {
|
|
if r == "true" || r == "1" {
|
|
ret = true
|
|
} else if r != "false" && r != "0" {
|
|
err = fmt.Errorf("Cannot parse as a boolean")
|
|
}
|
|
}
|
|
return ret, err
|
|
}
|
|
|
|
// SetBool Sets a boolean value
|
|
func (b *DB) SetBool(path []string, key string, val bool) error {
|
|
if val {
|
|
return b.SetValue(path, key, "true")
|
|
}
|
|
return b.SetValue(path, key, "false")
|
|
}
|
|
|
|
// GetTimestamp returns the value at 'path'
|
|
// If the value cannot be parsed as a RFC3339, error
|
|
func (b *DB) GetTimestamp(path []string, key string) (time.Time, error) {
|
|
r, err := b.GetValue(path, key)
|
|
if err == nil {
|
|
return time.Parse(time.RFC3339, r)
|
|
}
|
|
return time.Unix(0, 0), err
|
|
}
|
|
|
|
// SetTimestamp saves a timestamp into the db
|
|
func (b *DB) SetTimestamp(path []string, key string, val time.Time) error {
|
|
return b.SetValue(path, key, val.Format(time.RFC3339))
|
|
}
|
|
|
|
// GetBucketList returns a list of all sub-buckets at path
|
|
func (b *DB) GetBucketList(path []string) ([]string, error) {
|
|
var err error
|
|
var ret []string
|
|
if !b.dbIsOpen {
|
|
if err = b.OpenDB(); err != nil {
|
|
return ret, err
|
|
}
|
|
defer b.CloseDB()
|
|
}
|
|
|
|
err = b.boltDB.Update(func(tx *bolt.Tx) error {
|
|
bkt := tx.Bucket([]byte(path[0]))
|
|
if bkt == nil {
|
|
return fmt.Errorf("Couldn't find bucket " + path[0])
|
|
}
|
|
var berr error
|
|
if len(path) > 1 {
|
|
for idx := 1; idx < len(path); idx++ {
|
|
bkt = bkt.Bucket([]byte(path[idx]))
|
|
if bkt == nil {
|
|
return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], " / "))
|
|
}
|
|
}
|
|
}
|
|
|
|
// newBkt should have the last bucket in the path
|
|
berr = bkt.ForEach(func(k, v []byte) error {
|
|
if v == nil {
|
|
// Must be a bucket
|
|
ret = append(ret, string(k))
|
|
}
|
|
return nil
|
|
})
|
|
return berr
|
|
})
|
|
return ret, err
|
|
}
|
|
|
|
// GetKeyList returns a list of all keys at path
|
|
func (b *DB) GetKeyList(path []string) ([]string, error) {
|
|
var err error
|
|
var ret []string
|
|
if !b.dbIsOpen {
|
|
if err = b.OpenDB(); err != nil {
|
|
return ret, err
|
|
}
|
|
defer b.CloseDB()
|
|
}
|
|
|
|
err = b.boltDB.Update(func(tx *bolt.Tx) error {
|
|
bkt := tx.Bucket([]byte(path[0]))
|
|
if bkt == nil {
|
|
return fmt.Errorf("Couldn't find bucket " + path[0])
|
|
}
|
|
if len(path) > 1 {
|
|
var newBkt *bolt.Bucket
|
|
for idx := 1; idx < len(path); idx++ {
|
|
newBkt = bkt.Bucket([]byte(path[idx]))
|
|
if newBkt == nil {
|
|
return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/"))
|
|
}
|
|
}
|
|
bkt = newBkt
|
|
}
|
|
// newBkt should have the last bucket in the path
|
|
berr := bkt.ForEach(func(k, v []byte) error {
|
|
if v != nil {
|
|
// Not a bucket
|
|
ret = append(ret, string(k))
|
|
}
|
|
return nil
|
|
})
|
|
return berr
|
|
})
|
|
return ret, err
|
|
}
|
|
|
|
// DeletePair deletes the pair with key at path
|
|
func (b *DB) DeletePair(path []string, key string) error {
|
|
var err error
|
|
if !b.dbIsOpen {
|
|
if err = b.OpenDB(); err != nil {
|
|
return err
|
|
}
|
|
defer b.CloseDB()
|
|
}
|
|
|
|
err = b.boltDB.Update(func(tx *bolt.Tx) error {
|
|
bkt := tx.Bucket([]byte(path[0]))
|
|
if bkt == nil {
|
|
return fmt.Errorf("Couldn't find bucket " + path[0])
|
|
}
|
|
if len(path) > 1 {
|
|
var newBkt *bolt.Bucket
|
|
for idx := 1; idx < len(path); idx++ {
|
|
newBkt = bkt.Bucket([]byte(path[idx]))
|
|
if newBkt == nil {
|
|
return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/"))
|
|
}
|
|
}
|
|
bkt = newBkt
|
|
}
|
|
// bkt should have the last bucket in the path
|
|
// Test to make sure that key is a pair, if so, delete it
|
|
if tst := bkt.Bucket([]byte(key)); tst == nil {
|
|
return bkt.Delete([]byte(key))
|
|
}
|
|
return nil
|
|
})
|
|
return err
|
|
}
|
|
|
|
// DeleteBucket deletes the bucket key at path
|
|
func (b *DB) DeleteBucket(path []string, key string) error {
|
|
var err error
|
|
if !b.dbIsOpen {
|
|
if err = b.OpenDB(); err != nil {
|
|
return err
|
|
}
|
|
defer b.CloseDB()
|
|
}
|
|
|
|
err = b.boltDB.Update(func(tx *bolt.Tx) error {
|
|
bkt := tx.Bucket([]byte(path[0]))
|
|
if bkt == nil {
|
|
return fmt.Errorf("Couldn't find bucket " + path[0])
|
|
}
|
|
for idx := 1; idx < len(path); idx++ {
|
|
bkt = bkt.Bucket([]byte(path[idx]))
|
|
if bkt == nil {
|
|
return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/"))
|
|
}
|
|
}
|
|
// bkt should have the last bucket in the path
|
|
// Test to make sure that key is a bucket, if so, delete it
|
|
if tst := bkt.Bucket([]byte(key)); tst != nil {
|
|
return bkt.DeleteBucket([]byte(key))
|
|
}
|
|
return nil
|
|
})
|
|
return err
|
|
}
|