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db.go
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db.go
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package db
import (
"fmt"
"log"
"os"
"path"
"novels/dtype"
"github.com/chanyipiaomiao/hltool"
)
// NovelCURD NovelCURD
type NovelCURD struct {
DB *hltool.BoltDB
}
// NewNovelCURD NewNovelCURD
func NewNovelCURD() *NovelCURD {
dbPath := path.Join(path.Dir(os.Args[0]), "data", "novel.db")
db, err := hltool.NewBoltDB(dbPath, "novel")
if err != nil {
log.Fatalf("db error: %s\n", err)
}
return &NovelCURD{DB: db}
}
// Get Get
func (n *NovelCURD) Get(name string) (*dtype.Novel, error) {
novels, err := n.DB.Get([]string{name})
if err != nil {
return nil, fmt.Errorf("db get error: %s", err)
}
if _, ok := novels[name]; !ok {
return nil, nil
}
novel := &dtype.Novel{}
err = hltool.BytesToStruct(novels[name], novel)
if err != nil {
return nil, fmt.Errorf("BytesToStruct error: %s", err)
}
return novel, nil
}
// GetAll GetAll
func (n *NovelCURD) GetAll() (map[string][]byte, error) {
m, err := n.DB.GetAll()
if err != nil {
return nil, err
}
return m, nil
}
// GetAllNovel 获取所有的小说
func GetAllNovel() ([]*dtype.Novel, error) {
d := NewNovelCURD()
m, err := d.GetAll()
if err != nil {
return nil, err
}
var novels []*dtype.Novel
for _, v := range m {
novel := &dtype.Novel{}
err := hltool.BytesToStruct(v, novel)
if err != nil {
return nil, fmt.Errorf("BytesToStruct error: %s\n", err)
}
novels = append(novels, novel)
}
return novels, nil
}
// Update 更新
func (n *NovelCURD) Update(novel *dtype.Novel) error {
b, err := hltool.StructToBytes(novel)
if err != nil {
return fmt.Errorf("StructToBytes error: %s", err)
}
n.DB.Set(map[string][]byte{
novel.Name: b,
})
return nil
}
// Delete 删除
func (n *NovelCURD) Delete(name string) error {
err := n.DB.Delete([]string{name})
if err != nil {
return fmt.Errorf("db error: %s", err)
}
return nil
}