Implement more endpoints & overhaul [2/n]

Drop LevelDB and move all the things to SQLite.

Implemented endpoints:
/api <unit, accessoryMaterialAll>
/api <unit, accessoryTab>
/live/continue
/live/partyList
/unit/favoriteAccessory (WIP)
/unit/sale

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

pkg/db/db.go

@@ -1,15 +1,11 @@
 package db
 
 import (
-	"fmt"
-
 	_ "modernc.org/sqlite"
 	"xorm.io/xorm"
 )
 
 var (
-	Ldb *LdbInstance
-
 	MainDb  = "assets/main.db"
 	UserDb  = "assets/data.db"
 	MainEng *xorm.Engine
@@ -17,8 +13,6 @@ var (
 )
 
 func init() {
-	Ldb = GetLdbInstance()
-
 	eng, err := xorm.NewEngine("sqlite", MainDb)
 	if err != nil {
 		panic(err)
@@ -43,13 +37,3 @@ func init() {
 	eng.SetMaxIdleConns(5)
 	UserEng = eng
 }
-
-func MatchTokenUid(token, uid string) bool {
-	res, err := Ldb.Get([]byte(uid))
-	if err != nil {
-		fmt.Println(err)
-		return false
-	}
-
-	return string(res) == token
-}

pkg/db/leveldb.go

@@ -1,58 +0,0 @@
-package db
-
-import (
-	"errors"
-	"sync"
-
-	"github.com/syndtr/goleveldb/leveldb"
-)
-
-var (
-	once sync.Once
-)
-
-type LdbInstance struct {
-	db *leveldb.DB
-	mu sync.Mutex
-}
-
-func GetLdbInstance() *LdbInstance {
-	in := LdbInstance{}
-	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 *LdbInstance) Close() error {
-	in.mu.Lock()
-	defer in.mu.Unlock()
-	if in.db != nil {
-		return in.db.Close()
-	}
-	return nil
-}
-
-func (in *LdbInstance) 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 *LdbInstance) Set(key, value []byte) error {
-	if len(key) == 0 {
-		return errors.New("empty key")
-	}
-	return in.db.Put(key, value, nil)
-}