factory design pattern

factory/factory.go

@@ -0,0 +1,67 @@
+package factory
+
+import (
+	"fmt"
+	"time"
+)
+
+type Content interface {
+	Play()
+}
+
+type CloudContent struct{}
+
+func (c *CloudContent) Play() {
+	fmt.Println("this is cloud content")
+}
+
+type ProgrammingContent struct{}
+
+func (c *ProgrammingContent) Play() {
+	fmt.Println("this is programming content")
+}
+
+type MarketingContent struct{}
+
+func (c *MarketingContent) Play() {
+	fmt.Println("this is marketing content")
+}
+
+type ContentType string
+
+const (
+	Bisnis  ContentType = "bisnis"
+	Edukasi ContentType = "edukasi"
+)
+
+type ContentCreator interface {
+	Produce(time time.Time) Content
+	Type() ContentType
+}
+
+type Imre struct{}
+
+func (i *Imre) Produce(time time.Time) Content {
+
+	if time.Weekday().String() == "Tuesday" {
+		return &CloudContent{}
+	} else if time.Weekday().String() == "Saturday" {
+		return &ProgrammingContent{}
+	}
+
+	return nil
+}
+
+func (i Imre) Type() ContentType {
+	return Edukasi
+}
+
+type DewaPrayoga struct{}
+
+func (d *DewaPrayoga) Produce(time time.Time) Content {
+	return &MarketingContent{}
+}
+
+func (d DewaPrayoga) Type() ContentType {
+	return Bisnis
+}

go.mod

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+module github.com/adiputra22/go-design-pattern
+
+go 1.16

main.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/adiputra22/go-design-pattern/factory"
+)
+
+func main() {
+	var contentCreator factory.ContentCreator
+
+	// call imre
+	contentCreator = &factory.Imre{}
+	content := contentCreator.Produce(time.Now())
+	content.Play()
+	fmt.Println(contentCreator.Type())
+
+	// call dewa
+	contentCreator = &factory.DewaPrayoga{}
+	content = contentCreator.Produce(time.Now())
+	content.Play()
+	fmt.Println(contentCreator.Type())
+}