commit 5efa5d877eecb50b569dc81edf73fb8b924eeae8
Author: bryanqiu <bryanqiu@tencent.com>
Date:   Wed Jun 7 09:44:56 2023 +0800

    initial version

diff --git a/app.go b/app.go
new file mode 100644
index 0000000..378ed8f
--- /dev/null
+++ b/app.go
@@ -0,0 +1,85 @@
+package app
+
+import (
+	"errors"
+
+	"qoobing.com/gomod/cache"
+	"qoobing.com/gomod/log"
+)
+
+var (
+	appCacher       cache.Cacher[App] = nil
+	ErrAppNotExist                    = errors.New("app is not exist")
+	ErrAppidInvalid                   = errors.New("app is invalid")
+)
+
+type App struct {
+	AppId            string                 `json:"appid"`
+	AppName          string                 `json:"appname"`
+	AppType          string                 `json:"apptype"`
+	AppTitle         string                 `json:"apptitle"`
+	AppSecureKey     string                 `json:"appseckey"`
+	AppSpecialConfig map[string]interface{} `json:"appconfigs"`
+}
+
+func (a *App) Config(name string) interface{} {
+	if confstr, ok := a.AppSpecialConfig[name]; !ok {
+		return nil
+	} else {
+		return confstr
+	}
+}
+
+func (a *App) ConfigInt(name string, defaultvalue int) int {
+	if c := a.Config(name); c != nil {
+		return c.(int)
+	}
+	return defaultvalue
+}
+
+func (a *App) ConfigBool(name string, defaultvalue bool) bool {
+	if c := a.Config(name); c != nil {
+		return c.(bool)
+	}
+	return defaultvalue
+}
+
+func (a *App) ConfigString(name string, defaultvalue string) string {
+	if c := a.Config(name); c != nil {
+		return c.(string)
+	}
+	return defaultvalue
+}
+
+type (
+	Options     = cache.Config
+	AppStorager = cache.Getter[App]
+)
+
+// Init initial the app storager.
+//
+// Example for app initializer:
+//
+// Example for app config user:
+func Init(storager AppStorager, options Options) {
+	appCacher = cache.NewCache[App](storager, options)
+}
+
+// GetAppByAppId get app config by appid.
+func GetAppByAppId(appid string) (*App, error) {
+	// Step 1. check appid checksum
+	// TODO: check appid checksum
+	if len(appid) < 8 {
+		return nil, ErrAppidInvalid
+	}
+
+	// Step 2. get from cache
+	var app, err = appCacher.GetFromCache(appid)
+	if err != nil {
+		return nil, ErrAppidInvalid
+	}
+
+	// Step 3. return
+	log.PrintPretty("success cached/return app:", app)
+	return app, nil
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..1f6aa40
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module qoobing.com/gomod/app
+
+go 1.19