Refactor RegisterDatabase

pkg/common/kv.go

@@ -0,0 +1,69 @@
+// Copyright 2020 beego-dev
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package common
+
+// KV is common structure to store key-value data.
+// when you need something like Pair, you can use this
+type KV struct {
+	Key   interface{}
+	Value interface{}
+}
+
+// KVs will store KV collection as map
+type KVs struct {
+	kvs map[interface{}]interface{}
+}
+
+// GetValueOr check whether this contains the key,
+// if the key not found, the default value will be return
+func (kvs *KVs) GetValueOr(key interface{}, defValue interface{}) interface{} {
+	v, ok := kvs.kvs[key]
+	if ok {
+		return v
+	}
+	return defValue
+}
+
+// Contains will check whether contains the key
+func (kvs *KVs) Contains(key interface{}) bool {
+	_, ok := kvs.kvs[key]
+	return ok
+}
+
+// IfContains is a functional API that if the key is in KVs, the action will be invoked
+func (kvs *KVs) IfContains(key interface{}, action func(value interface{})) *KVs {
+	v, ok := kvs.kvs[key]
+	if ok {
+		action(v)
+	}
+	return kvs
+}
+
+// Put store the value
+func (kvs *KVs) Put(key interface{}, value interface{}) *KVs {
+	kvs.kvs[key] = value
+	return kvs
+}
+
+// NewKVs will create the *KVs instance
+func NewKVs(kvs ...KV) *KVs {
+	res := &KVs{
+		kvs: make(map[interface{}]interface{}, len(kvs)),
+	}
+	for _, kv := range kvs {
+		res.kvs[kv.Key] = kv.Value
+	}
+	return res
+}

pkg/common/kv_test.go

@@ -0,0 +1,40 @@
+// Copyright 2020 beego-dev
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package common
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestKVs(t *testing.T) {
+	key := "my-key"
+	kvs := NewKVs(KV{
+		Key: key,
+		Value: 12,
+	})
+
+	assert.True(t, kvs.Contains(key))
+
+	kvs.IfContains(key, func(value interface{}) {
+		kvs.Put("my-key1", "")
+	})
+
+	assert.True(t, kvs.Contains("my-key1"))
+
+	v := kvs.GetValueOr(key, 13)
+	assert.Equal(t, 12, v)
+}