Reorganize directory structures

Signed-off-by: Sean Du <do4suki@gmail.com>

pkg/db/db.go

@@ -0,0 +1,63 @@
+package db
+
+import (
+	"fmt"
+	"honoka-chan/pkg/utils"
+	"os"
+
+	_ "modernc.org/sqlite"
+	"xorm.io/xorm"
+)
+
+var (
+	DB *Instance
+
+	ExampleDb = "assets/data.example.db"
+	MainDb    = "assets/main.db"
+	UserDb    = "assets/data.db"
+	MainEng   *xorm.Engine
+	UserEng   *xorm.Engine
+)
+
+func init() {
+	DB = GetInstance()
+
+	_, err := os.Stat(UserDb)
+	if err != nil {
+		utils.WriteAllText(UserDb, utils.ReadAllText(ExampleDb))
+	}
+
+	eng, err := xorm.NewEngine("sqlite", MainDb)
+	if err != nil {
+		panic(err)
+	}
+	err = eng.Ping()
+	if err != nil {
+		panic(err)
+	}
+	eng.SetMaxOpenConns(10)
+	eng.SetMaxIdleConns(5)
+	MainEng = eng
+
+	eng, err = xorm.NewEngine("sqlite", UserDb)
+	if err != nil {
+		panic(err)
+	}
+	err = eng.Ping()
+	if err != nil {
+		panic(err)
+	}
+	eng.SetMaxOpenConns(10)
+	eng.SetMaxIdleConns(5)
+	UserEng = eng
+}
+
+func MatchTokenUid(token, uid string) bool {
+	res, err := DB.Get([]byte(uid))
+	if err != nil {
+		fmt.Println(err)
+		return false
+	}
+
+	return string(res) == token
+}

pkg/db/leveldb.go

@@ -0,0 +1,58 @@
+package db
+
+import (
+	"errors"
+	"sync"
+
+	"github.com/syndtr/goleveldb/leveldb"
+)
+
+var (
+	once sync.Once
+)
+
+type Instance struct {
+	db *leveldb.DB
+	mu sync.Mutex
+}
+
+func GetInstance() *Instance {
+	in := Instance{}
+	once.Do(func() {
+		var err error
+		in.db, err = leveldb.OpenFile("./data/honoka-chan.db", nil)
+		if err != nil {
+			panic(err)
+		}
+	})
+	return &in
+}
+
+func (in *Instance) Close() error {
+	in.mu.Lock()
+	defer in.mu.Unlock()
+	if in.db != nil {
+		return in.db.Close()
+	}
+	return nil
+}
+
+func (in *Instance) Get(key []byte) ([]byte, error) {
+	if len(key) == 0 {
+		return nil, errors.New("empty key")
+	}
+	res, err := in.db.Get(key, nil)
+	if err == leveldb.ErrNotFound {
+		return nil, nil
+	} else if err != nil {
+		return nil, err
+	}
+	return res, nil
+}
+
+func (in *Instance) Set(key, value []byte) error {
+	if len(key) == 0 {
+		return errors.New("empty key")
+	}
+	return in.db.Put(key, value, nil)
+}