use context when getting access token (#815)

* use context

Signed-off-by: mqf20 <mingqingfoo@gmail.com>

* added docs

Signed-off-by: mqf20 <mingqingfoo@gmail.com>

* improved docs

Signed-off-by: mqf20 <mingqingfoo@gmail.com>

* added SetAccessTokenContextHandle

Signed-off-by: mqf20 <mingqingfoo@gmail.com>

---------

Signed-off-by: mqf20 <mingqingfoo@gmail.com>

miniprogram/business/phone_number.go

@@ -34,7 +34,7 @@ func (business *Business) GetPhoneNumber(in *GetPhoneNumberRequest) (info PhoneI
 
 // GetPhoneNumberWithContext 利用context将code换取用户手机号。 每个code只能使用一次，code的有效期为5min
 func (business *Business) GetPhoneNumberWithContext(ctx context.Context, in *GetPhoneNumberRequest) (info PhoneInfo, err error) {
-	accessToken, err := business.GetAccessToken()
+	accessToken, err := business.GetAccessTokenContext(ctx)
 	if err != nil {
 		return
 	}

miniprogram/context/context.go

@@ -8,5 +8,5 @@ import (
 // Context struct
 type Context struct {
 	*config.Config
-	credential.AccessTokenHandle
+	credential.AccessTokenContextHandle
 }

miniprogram/miniprogram.go

@@ -42,15 +42,22 @@ func NewMiniProgram(cfg *config.Config) *MiniProgram {
 		defaultAkHandle = credential.NewDefaultAccessToken(cfg.AppID, cfg.AppSecret, cacheKeyPrefix, cfg.Cache)
 	}
 	ctx := &context.Context{
-		Config:            cfg,
-		AccessTokenHandle: defaultAkHandle,
+		Config:                   cfg,
+		AccessTokenContextHandle: defaultAkHandle,
 	}
 	return &MiniProgram{ctx}
 }
 
 // SetAccessTokenHandle 自定义 access_token 获取方式
 func (miniProgram *MiniProgram) SetAccessTokenHandle(accessTokenHandle credential.AccessTokenHandle) {
-	miniProgram.ctx.AccessTokenHandle = accessTokenHandle
+	miniProgram.ctx.AccessTokenContextHandle = credential.AccessTokenCompatibleHandle{
+		AccessTokenHandle: accessTokenHandle,
+	}
+}
+
+// SetAccessTokenContextHandle 自定义 access_token 获取方式
+func (miniProgram *MiniProgram) SetAccessTokenContextHandle(accessTokenContextHandle credential.AccessTokenContextHandle) {
+	miniProgram.ctx.AccessTokenContextHandle = accessTokenContextHandle
 }
 
 // GetContext get Context