to options mode

providers/options.go

@@ -0,0 +1,62 @@
+package providers
+
+import (
+	"github.com/spf13/viper"
+	"go.uber.org/dig"
+)
+
+type Options struct {
+	Config       *viper.Viper
+	ConfigPrefix string
+	Name         string
+	Group        string
+}
+
+type Option func(o *Options)
+
+func New(opts ...Option) *Options {
+	o := &Options{}
+	for _, opt := range opts {
+		opt(o)
+	}
+	return o
+}
+
+func (o *Options) UnmarshalConfig(config interface{}) error {
+	return o.Config.UnmarshalKey(o.ConfigPrefix, &config)
+}
+
+func (o *Options) DiOptions() []dig.ProvideOption {
+	options := []dig.ProvideOption{}
+	if o.Name != "" {
+		options = append(options, dig.Name(o.Name))
+	}
+	if o.Group != "" {
+		options = append(options, dig.Group(o.Group))
+	}
+	return options
+}
+
+func WithConfig(config *viper.Viper) Option {
+	return func(o *Options) {
+		o.Config = config
+	}
+}
+
+func WithName(name string) Option {
+	return func(o *Options) {
+		o.Name = name
+	}
+}
+
+func WithGroup(group string) Option {
+	return func(o *Options) {
+		o.Group = group
+	}
+}
+
+func WithConfigPrefix(prefix string) Option {
+	return func(o *Options) {
+		o.ConfigPrefix = prefix
+	}
+}