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db.go
72 lines (61 loc) · 1.17 KB
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db.go
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// Copyright 2016, Homin Lee <homin.lee@suapapa.net>. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"encoding/gob"
"os"
"path/filepath"
)
var locs = make(map[string]int)
var dbFile = filepath.Join(os.Getenv("HOME"), ".wdate")
func loadDB() error {
if !isFileExist(dbFile) {
return nil
}
f, err := os.Open(dbFile)
if err != nil {
return err
}
defer f.Close()
dec := gob.NewDecoder(f)
err = dec.Decode(&locs)
if err != nil {
return err
}
return nil
}
func addLocation(name string, offset int) error {
locs[name] = offset
f, err := os.Create(dbFile)
if err != nil {
return err
}
defer f.Close()
enc := gob.NewEncoder(f)
err = enc.Encode(locs)
if err != nil {
return err
}
return nil
}
func removeLocation(name string) error {
delete(locs, name)
f, err := os.Create(dbFile)
if err != nil {
return err
}
defer f.Close()
enc := gob.NewEncoder(f)
err = enc.Encode(locs)
if err != nil {
return err
}
return nil
}
func isFileExist(fileName string) bool {
if _, err := os.Stat(fileName); os.IsNotExist(err) {
return false
}
return true
}