commit bf2846b9503b0aeb70cbd2bcefd230bfb012258b
Author: Emmm Monster <58943012+emmmx@users.noreply.github.com>
Date:   Fri Dec 25 22:39:50 2020 +0800

    Init Project

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..485dee6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea
diff --git a/algo/common/common.go b/algo/common/common.go
new file mode 100644
index 0000000..bfbe5d5
--- /dev/null
+++ b/algo/common/common.go
@@ -0,0 +1,15 @@
+package common
+
+type Decoder interface {
+	Decode() error
+	GetCoverImage() []byte
+	GetAudioData() []byte
+	GetAudioExt() string
+	GetMeta() *Meta
+}
+
+type Meta interface {
+	GetArtists() []string
+	GetTitle() string
+	GetAlbum() string
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..12e3f0d
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,8 @@
+module github.com/umlock-music/cli
+
+go 1.15
+
+require (
+	go.uber.org/multierr v1.6.0 // indirect
+	go.uber.org/zap v1.16.0
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..727c0b1
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,59 @@
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diff --git a/internal/logging/logging.go b/internal/logging/logging.go
new file mode 100644
index 0000000..b14012d
--- /dev/null
+++ b/internal/logging/logging.go
@@ -0,0 +1,41 @@
+package logging
+
+import (
+	"os"
+	"sync"
+	"time"
+)
+
+import (
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+)
+
+// newDefaultProductionLog configures a custom log that is
+// intended for use by default if no other log is specified
+// in a config. It writes to stderr, uses the console encoder,
+// and enables INFO-level logs and higher.
+func newDefaultProductionLog() *zap.Logger {
+	encCfg := zap.NewProductionEncoderConfig()
+	// if interactive terminal, make output more human-readable by default
+	encCfg.EncodeTime = func(ts time.Time, encoder zapcore.PrimitiveArrayEncoder) {
+		encoder.AppendString(ts.Format("2006/01/02 15:04:05.000"))
+	}
+	encCfg.EncodeLevel = zapcore.CapitalColorLevelEncoder
+	enc := zapcore.NewConsoleEncoder(encCfg)
+	core := zapcore.NewCore(enc, zapcore.Lock(os.Stdout), zap.NewAtomicLevelAt(zap.DebugLevel))
+	return zap.New(core)
+
+}
+
+// Log returns the current default logger.
+func Log() *zap.Logger {
+	defaultLoggerMu.RLock()
+	defer defaultLoggerMu.RUnlock()
+	return defaultLogger
+}
+
+var (
+	defaultLogger   = newDefaultProductionLog()
+	defaultLoggerMu sync.RWMutex
+)
diff --git a/internal/utils/crypto.go b/internal/utils/crypto.go
new file mode 100644
index 0000000..c7ce0f5
--- /dev/null
+++ b/internal/utils/crypto.go
@@ -0,0 +1,19 @@
+package utils
+
+import "crypto/aes"
+
+func PKCS7UnPadding(encrypt []byte) []byte {
+	length := len(encrypt)
+	unPadding := int(encrypt[length-1])
+	return encrypt[:(length - unPadding)]
+}
+
+func DecryptAes128Ecb(data, key []byte) []byte {
+	cipher, _ := aes.NewCipher(key)
+	decrypted := make([]byte, len(data))
+	size := 16
+	for bs, be := 0, size; bs < len(data); bs, be = bs+size, be+size {
+		cipher.Decrypt(decrypted[bs:be], data[bs:be])
+	}
+	return decrypted
+}