add sample

README.md

@@ -5,7 +5,7 @@
 Easily manage 🕸DAG🕷 with Go.<br>
 DAG is an acronym for Directed Acyclic Graph.<br>
 Output is in PlantUML or Mermaid format.<br>
-Useful for progressing tasks.
+Useful for progressing tasks, designing components, etc...
 
 ⚠It is incompatible with v0.2.0 and earlier versions⚠
 
@@ -348,8 +348,13 @@ func main() {
 }
 ```
 
-### ginger grilled pork recipe (and more)
+### Ginger grilled pork recipe (and more)
 ![dag](_example/dinner/dag.svg)
 
+### Component design
+![dag](_example/component_design/components.svg)
+
+- 「Clean Architecture 達人に学ぶソフトウェアの構造と設計」P131 図14-4 より
+
 # Reference
 - [about DAG](https://nave-kazu.hatenablog.com/entry/2015/11/30/154810)

_example/component_design/README.md

@@ -0,0 +1,8 @@
+# コンポーネントの依存関係
+- 「Clean Architecture 達人に学ぶソフトウェアの構造と設計」P131 図14-4
+
+![image](components.svg)
+
+```console
+go run main.go > components.pu
+```

_example/component_design/components.pu

@@ -0,0 +1,27 @@
+@startuml
+rectangle "Main" as 1
+usecase "View" as 2
+usecase "Presenters" as 4
+usecase "Interactors" as 5
+usecase "Entities" as 8
+usecase "Permissions" as 9
+usecase "Database" as 7
+usecase "Controllers" as 3
+usecase "Authorizer" as 6
+
+1 --> 2
+2 --> 4
+4 --> 5
+5 --> 8
+8 --> 9
+1 --> 5
+1 --> 7
+7 --> 5
+7 --> 8
+1 --> 3
+3 --> 5
+1 --> 6
+6 --> 5
+6 --> 9
+
+@enduml

_example/component_design/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	g "github.com/ddddddO/gdag"
+)
+
+func main() {
+	mainComp := g.DAG("Main")
+	view := g.Task("View")
+	controllers := g.Task("Controllers")
+	presenters := g.Task("Presenters")
+	interactors := g.Task("Interactors")
+	authorizer := g.Task("Authorizer")
+	database := g.Task("Database")
+	entities := g.Task("Entities")
+	permissions := g.Task("Permissions")
+
+	mainComp.Con(view).Con(presenters).Con(interactors)
+	mainComp.Con(interactors).Con(entities)
+	mainComp.Con(database).Con(interactors)
+	database.Con(entities).Con(permissions)
+	mainComp.Con(controllers).Con(interactors).Con(entities)
+	mainComp.Con(authorizer).Con(interactors)
+	authorizer.Con(permissions)
+
+	uml, err := mainComp.UML()
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+	fmt.Println(uml)
+}