Add more methods to Configer

pkg/config.go

@@ -411,6 +411,7 @@ func LoadAppConfig(adapterName, configPath string) error {
 }
 
 type beegoAppConfig struct {
+	config.BaseConfiger
 	innerConfig config.Configer
 }
 
@@ -419,7 +420,7 @@ func newAppConfig(appConfigProvider, appConfigPath string) (*beegoAppConfig, err
 	if err != nil {
 		return nil, err
 	}
-	return &beegoAppConfig{ac}, nil
+	return &beegoAppConfig{innerConfig: ac}, nil
 }
 
 func (b *beegoAppConfig) Set(key, val string) error {

pkg/config/base_config_test.go

@@ -0,0 +1,71 @@
+// Copyright 2020
+//
+// 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 config
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBaseConfiger_DefaultBool(t *testing.T) {
+	bc := newBaseConfier("true")
+	assert.True(t, bc.DefaultBool("key1", false))
+	assert.True(t, bc.DefaultBool("key2", true))
+}
+
+func TestBaseConfiger_DefaultFloat(t *testing.T) {
+	bc := newBaseConfier("12.3")
+	assert.Equal(t, 12.3, bc.DefaultFloat("key1", 0.1))
+	assert.Equal(t, 0.1, bc.DefaultFloat("key2", 0.1))
+}
+
+func TestBaseConfiger_DefaultInt(t *testing.T) {
+	bc := newBaseConfier("10")
+	assert.Equal(t, 10, bc.DefaultInt("key1", 8))
+	assert.Equal(t, 8, bc.DefaultInt("key2", 8))
+}
+
+func TestBaseConfiger_DefaultInt64(t *testing.T) {
+	bc := newBaseConfier("64")
+	assert.Equal(t, int64(64), bc.DefaultInt64("key1", int64(8)))
+	assert.Equal(t, int64(8), bc.DefaultInt64("key2", int64(8)))
+}
+
+func TestBaseConfiger_DefaultString(t *testing.T) {
+	bc := newBaseConfier("Hello")
+	assert.Equal(t, "Hello", bc.DefaultString("key1", "world"))
+	assert.Equal(t, "world", bc.DefaultString("key2", "world"))
+}
+
+func TestBaseConfiger_DefaultStrings(t *testing.T) {
+	bc := newBaseConfier("Hello;world")
+	assert.Equal(t, []string{"Hello", "world"}, bc.DefaultStrings("key1", []string{"world"}))
+	assert.Equal(t, []string{"world"}, bc.DefaultStrings("key2", []string{"world"}))
+}
+
+func newBaseConfier(str1 string) *BaseConfiger {
+	return &BaseConfiger{
+		reader: func(key string) (string, error) {
+			if key == "key1" {
+				return str1, nil
+			} else {
+				return "", errors.New("mock error")
+			}
+
+		},
+	}
+}

pkg/config/config.go

@@ -41,32 +41,153 @@
 package config
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"reflect"
+	"strconv"
+	"strings"
 	"time"
 )
 
 // Configer defines how to get and set value from configuration raw data.
 type Configer interface {
-	Set(key, val string) error   //support section::key type in given key when using ini type.
-	String(key string) string    //support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
-	Strings(key string) []string //get string slice
+	// support section::key type in given key when using ini type.
+	Set(key, val string) error
+
+	// support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
+	String(key string) string
+	// get string slice
+	Strings(key string) []string
 	Int(key string) (int, error)
 	Int64(key string) (int64, error)
 	Bool(key string) (bool, error)
 	Float(key string) (float64, error)
-	DefaultString(key string, defaultVal string) string      // support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
-	DefaultStrings(key string, defaultVal []string) []string //get string slice
+	// support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
+	DefaultString(key string, defaultVal string) string
+	// get string slice
+	DefaultStrings(key string, defaultVal []string) []string
 	DefaultInt(key string, defaultVal int) int
 	DefaultInt64(key string, defaultVal int64) int64
 	DefaultBool(key string, defaultVal bool) bool
 	DefaultFloat(key string, defaultVal float64) float64
 	DIY(key string) (interface{}, error)
 	GetSection(section string) (map[string]string, error)
+
+	Unmarshaler(obj interface{}) error
+	Sub(key string) (Configer, error)
+	OnChange(fn func(cfg Configer))
+	// GetByPrefix(prefix string) ([]byte, error)
+	// GetSerializer() Serializer
 	SaveConfigFile(filename string) error
 }
 
+type BaseConfiger struct {
+	// The reader should support key like "a.b.c"
+	reader func(key string) (string, error)
+}
+
+func (c *BaseConfiger) Int(key string) (int, error) {
+	res, err := c.reader(key)
+	if err != nil {
+		return 0, err
+	}
+	return strconv.Atoi(res)
+}
+
+func (c *BaseConfiger) Int64(key string) (int64, error) {
+	res, err := c.reader(key)
+	if err != nil {
+		return 0, err
+	}
+	return strconv.ParseInt(res, 10, 64)
+}
+
+func (c *BaseConfiger) Bool(key string) (bool, error) {
+	res, err := c.reader(key)
+	if err != nil {
+		return false, err
+	}
+	return strconv.ParseBool(res)
+}
+
+func (c *BaseConfiger) Float(key string) (float64, error) {
+	res, err := c.reader(key)
+	if err != nil {
+		return 0, err
+	}
+	return strconv.ParseFloat(res, 64)
+}
+
+func (c *BaseConfiger) DefaultString(key string, defaultVal string) string {
+	if res := c.String(key); res != "" {
+		return res
+	}
+	return defaultVal
+}
+
+func (c *BaseConfiger) DefaultStrings(key string, defaultVal []string) []string {
+	if res := c.Strings(key); len(res) > 0 {
+		return res
+	}
+	return defaultVal
+}
+
+func (c *BaseConfiger) DefaultInt(key string, defaultVal int) int {
+	if res, err := c.Int(key); err == nil {
+		return res
+	}
+	return defaultVal
+}
+
+func (c *BaseConfiger) DefaultInt64(key string, defaultVal int64) int64 {
+	if res, err := c.Int64(key); err == nil {
+		return res
+	}
+	return defaultVal
+}
+
+func (c *BaseConfiger) DefaultBool(key string, defaultVal bool) bool {
+	if res, err := c.Bool(key); err == nil {
+		return res
+	}
+	return defaultVal
+}
+func (c *BaseConfiger) DefaultFloat(key string, defaultVal float64) float64 {
+	if res, err := c.Float(key); err == nil {
+		return res
+	}
+	return defaultVal
+}
+
+func (c *BaseConfiger) String(key string) string {
+	res, _ := c.reader(key)
+	return res
+}
+
+func (c *BaseConfiger) Strings(key string) []string {
+	res, err := c.reader(key)
+	if err != nil || res == "" {
+		return nil
+	}
+	return strings.Split(res, ";")
+}
+
+// TODO remove this before release v2.0.0
+func (c *BaseConfiger) Unmarshaler(obj interface{}) error {
+	return errors.New("unsupported operation")
+}
+
+// TODO remove this before release v2.0.0
+func (c *BaseConfiger) Sub(key string) (Configer, error) {
+	return nil, errors.New("unsupported operation")
+}
+
+// TODO remove this before release v2.0.0
+func (c *BaseConfiger) OnChange(fn func(cfg Configer)) {
+	// do nothing
+}
+
 // Config is the adapter interface for parsing config file to get raw data to Configer.
 type Config interface {
 	Parse(key string) (Configer, error)

pkg/config/fake.go

@@ -21,6 +21,7 @@ import (
 )
 
 type fakeConfigContainer struct {
+	BaseConfiger
 	data map[string]string
 }
 

pkg/config/ini.go

@@ -225,6 +225,7 @@ func (ini *IniConfig) ParseData(data []byte) (Configer, error) {
 // IniConfigContainer is a config which represents the ini configuration.
 // When set and get value, support key as section:name type.
 type IniConfigContainer struct {
+	BaseConfiger
 	data           map[string]map[string]string // section=> key:val
 	sectionComment map[string]string            // section : comment
 	keyComment     map[string]string            // id: []{comment, key...}; id 1 is for main comment.

pkg/config/json/json.go

@@ -69,6 +69,7 @@ func (js *JSONConfig) ParseData(data []byte) (config.Configer, error) {
 // JSONConfigContainer is a config which represents the json configuration.
 // Only when get value, support key as section:name type.
 type JSONConfigContainer struct {
+	config.BaseConfiger
 	data map[string]interface{}
 	sync.RWMutex
 }

pkg/config/xml/xml.go

@@ -74,6 +74,7 @@ func (xc *Config) ParseData(data []byte) (config.Configer, error) {
 
 // ConfigContainer is a Config which represents the xml configuration.
 type ConfigContainer struct {
+	config.BaseConfiger
 	data map[string]interface{}
 	sync.Mutex
 }

pkg/config/yaml/yaml.go

@@ -118,6 +118,7 @@ func parseYML(buf []byte) (cnf map[string]interface{}, err error) {
 
 // ConfigContainer is a config which represents the yaml configuration.
 type ConfigContainer struct {
+	config.BaseConfiger
 	data map[string]interface{}
 	sync.RWMutex
 }