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cache.go
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cache.go
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package alfredV3
import (
"bytes"
"errors"
"io/ioutil"
"log"
"os"
"path"
"strconv"
"strings"
"time"
plist "github.com/DHowett/go-plist"
"github.com/boltdb/bolt"
)
const (
//CacheDir ...
CacheDir = "Library/Caches/com.runningwithcrayons.Alfred-3/Workflow Data/"
//InfoFile ...
InfoFile = "info.plist"
//
defaultExpireTime = 24 * time.Hour
)
var (
cachePath string
)
//InfoPlist defines the plist data format
type InfoPlist struct {
Bundleid string `plist:"bundleid"`
Category string `plist:"category"`
Name string `plist:"name"`
Description string `plist:"description"`
Author string `plist:"createdby"`
Webaddress string `plist:"webaddress"`
}
//Cache defines cache object
type Cache struct {
Expire int64
Res []string
Input string
}
func init() {
rootPath, err := os.Getwd()
if err != nil {
log.Fatalln(err)
}
rootInfoPath := path.Join(rootPath, InfoFile)
if _, err = os.Stat(rootInfoPath); os.IsNotExist(err) {
log.Fatalln(err)
}
info, err := ioutil.ReadFile(rootInfoPath)
if err != nil {
log.Fatalln(err)
}
var infoData InfoPlist
infoBuf := bytes.NewReader(info)
decoder := plist.NewDecoder(infoBuf)
err = decoder.Decode(&infoData)
if err != nil {
log.Fatalln(err)
}
cachePath = os.Getenv("alfred_workflow_cache")
if cachePath == "" {
cachePath = path.Join(rootPath, CacheDir, infoData.Bundleid)
}
//init db
initDB()
}
func initDB() {
db, err := bolt.Open(".cache", 0600, nil)
if err != nil {
log.Fatalln(err)
}
db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte("alfredItems"))
if err != nil {
log.Fatalln(err)
return err
}
return nil
})
db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte("expire"))
if err != nil {
log.Fatalln(err)
return err
}
return nil
})
}
//StoreData store data
func StoreData(cache *Cache) error {
if cache.Input == "" {
return errors.New("invalid input")
}
db, err := bolt.Open(".cache", 0600, nil)
if err != nil {
log.Fatalln(err)
}
db.Update(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("alfredItems"))
err := b.Put([]byte(cache.Input), []byte(strings.Join(cache.Res, ",")))
return err
})
db.Update(func(tx *bolt.Tx) error {
if cache.Expire == 0 {
//use default
cache.Expire = time.Now().Unix() + int64(defaultExpireTime)
}
b := tx.Bucket([]byte("expire"))
err := b.Put([]byte(cache.Input), []byte(strconv.FormatInt(cache.Expire, 10)))
return err
})
return nil
}
//FetchData get the cache by the key
func FetchData(key string) *Cache {
cache := new(Cache)
cache.Input = key
db, err := bolt.Open(".cache", 0600, nil)
if err != nil {
log.Fatalln(err)
}
db.View(func(tx *bolt.Tx) error {
bk := tx.Bucket([]byte("expire"))
var err error
cache.Expire, err = strconv.ParseInt(string(bk.Get([]byte(key))), 10, 64)
if err != nil {
return err
}
if cache.Expire < time.Now().Unix() {
cache.Res = []string{}
return nil
}
b := tx.Bucket([]byte("alfredItems"))
cache.Res = strings.SplitN(string(b.Get([]byte(key))), ",", -1)
return nil
})
return cache
}