Add example code

README.md

@@ -9,7 +9,7 @@
 # What is markdown package
 The Package markdown is a simple markdown builder in golang. The markdown package assembles Markdown using method chaining, not uses a template engine like [html/template](https://pkg.go.dev/html/template). The syntax of Markdown follows **GitHub Markdown**.
 
-The markdown package was initially developed to save test results in [nao1215/spectest](https://github.com/nao1215/spectest). Therefore, the markdown package implements the features required by spectest. For example, the markdown package supports **mermaid sequence diagrams (entity relationship diagram, sequence diagram, flowchart, pie chart)**, which was a necessary feature in spectest.
+The markdown package was initially developed to save test results in [nao1215/spectest](https://github.com/nao1215/spectest). Therefore, the markdown package implements the features required by spectest. For example, the markdown package supports **mermaid sequence diagrams (entity relationship diagram, sequence diagram, flowchart, pie chart, architecture diagram)**, which was a necessary feature in spectest.
 
 Additionally, complex code that increases the complexity of the library, such as generating nested lists, will not be added. I want to keep this library as simple as possible.
 
@@ -36,6 +36,7 @@ Additionally, complex code that increases the complexity of the library, such as
 - [x] mermaid entity relationship diagram
 - [x] mermaid flowchart 
 - [x] mermaid pie chart
+- [x] mermaid architecture diagram (beta feature) 
 
 ### Features not in Markdown syntax
 - Generate badges; RedBadge(), YellowBadge(), GreenBadge().

doc/architecture/generated.md

@@ -15,4 +15,4 @@ architecture-beta
     junctionCenter:R -- L:junctionRight
     top_gateway:B -- T:junctionRight
     bottom_gateway:T -- B:junctionRight
-```
+```

doc/er/generated.md

@@ -1,21 +1,21 @@
 ## Entity Relationship Diagram
 ```mermaid
 erDiagram
-	teachers ||--o{ students : "Teacher has many students"
-	teachers }|..|| schools : "School has many teachers"
-	schools {
-		int id PK,UK "School ID"
-		string name  "School Name"
-		int teacher_id FK,UK "Teacher ID"
-	}
-	students {
-		int id PK,UK "Student ID"
-		string name  "Student Name"
-		int teacher_id FK,UK "Teacher ID"
-	}
-	teachers {
-		int id PK,UK "Teacher ID"
-		string name  "Teacher Name"
-	}
+    teachers ||--o{ students : "Teacher has many students"
+    teachers }|..|| schools : "School has many teachers"
+    schools {
+        int id PK,UK "School ID"
+        string name  "School Name"
+        int teacher_id FK,UK "Teacher ID"
+    }
+    students {
+        int id PK,UK "Student ID"
+        string name  "Student Name"
+        int teacher_id FK,UK "Teacher ID"
+    }
+    teachers {
+        int id PK,UK "Teacher ID"
+        string name  "Teacher Name"
+    }
 
 ```

doc/flowchart/generated.md

@@ -4,12 +4,12 @@
 title: mermaid flowchart builder
 ---
 flowchart TB
-	A["Node A"]
-	B(["Node B"])
-	C[["Node C"]]
-	D[("Database")]
-	A-->B
-	B-->|"send original data"|D
-	B-->C
-	C-. "send filtered data" .-> D
+    A["Node A"]
+    B(["Node B"])
+    C[["Node C"]]
+    D[("Database")]
+    A-->B
+    B-->|"send original data"|D
+    B-->C
+    C-. "send filtered data" .-> D
 ```

mermaid/arch/examples_test.go

@@ -0,0 +1,118 @@
+//go:build linux || darwin
+
+package arch_test
+
+import (
+	"io"
+	"os"
+
+	"github.com/nao1215/markdown"
+	"github.com/nao1215/markdown/mermaid/arch"
+)
+
+// ExampleArchitecture skip this test on Windows.
+// The newline codes in the comment section where
+// the expected values are written are represented as '\n',
+// causing failures when testing on Windows.
+func ExampleArchitecture() {
+	diagram := arch.NewArchitecture(io.Discard).
+		Service("left_disk", arch.IconDisk, "Disk").
+		Service("top_disk", arch.IconDisk, "Disk").
+		Service("bottom_disk", arch.IconDisk, "Disk").
+		Service("top_gateway", arch.IconInternet, "Gateway").
+		Service("bottom_gateway", arch.IconInternet, "Gateway").
+		Junction("junctionCenter").
+		Junction("junctionRight").
+		LF().
+		Edges(
+			arch.Edge{
+				ServiceID: "left_disk",
+				Position:  arch.PositionRight,
+				Arrow:     arch.ArrowNone,
+			},
+			arch.Edge{
+				ServiceID: "junctionCenter",
+				Position:  arch.PositionLeft,
+				Arrow:     arch.ArrowNone,
+			}).
+		Edges(
+			arch.Edge{
+				ServiceID: "top_disk",
+				Position:  arch.PositionBottom,
+				Arrow:     arch.ArrowNone,
+			},
+			arch.Edge{
+				ServiceID: "junctionCenter",
+				Position:  arch.PositionTop,
+				Arrow:     arch.ArrowNone,
+			}).
+		Edges(
+			arch.Edge{
+				ServiceID: "bottom_disk",
+				Position:  arch.PositionTop,
+				Arrow:     arch.ArrowNone,
+			},
+			arch.Edge{
+				ServiceID: "junctionCenter",
+				Position:  arch.PositionBottom,
+				Arrow:     arch.ArrowNone,
+			}).
+		Edges(
+			arch.Edge{
+				ServiceID: "junctionCenter",
+				Position:  arch.PositionRight,
+				Arrow:     arch.ArrowNone,
+			},
+			arch.Edge{
+				ServiceID: "junctionRight",
+				Position:  arch.PositionLeft,
+				Arrow:     arch.ArrowNone,
+			}).
+		Edges(
+			arch.Edge{
+				ServiceID: "top_gateway",
+				Position:  arch.PositionBottom,
+				Arrow:     arch.ArrowNone,
+			},
+			arch.Edge{
+				ServiceID: "junctionRight",
+				Position:  arch.PositionTop,
+				Arrow:     arch.ArrowNone,
+			}).
+		Edges(
+			arch.Edge{
+				ServiceID: "bottom_gateway",
+				Position:  arch.PositionTop,
+				Arrow:     arch.ArrowNone,
+			},
+			arch.Edge{
+				ServiceID: "junctionRight",
+				Position:  arch.PositionBottom,
+				Arrow:     arch.ArrowNone,
+			}).String() //nolint
+
+	markdown.NewMarkdown(os.Stdout).
+		H2("Architecture Diagram").
+		CodeBlocks(markdown.SyntaxHighlightMermaid, diagram).
+		Build() //nolint
+
+	// Output:
+	//## Architecture Diagram
+	//```mermaid
+	//architecture-beta
+	//     service left_disk(disk)[Disk]
+	//     service top_disk(disk)[Disk]
+	//     service bottom_disk(disk)[Disk]
+	//     service top_gateway(internet)[Gateway]
+	//     service bottom_gateway(internet)[Gateway]
+	//     junction junctionCenter
+	//     junction junctionRight
+	//
+	//     left_disk:R -- L:junctionCenter
+	//     top_disk:B -- T:junctionCenter
+	//     bottom_disk:T -- B:junctionCenter
+	//     junctionCenter:R -- L:junctionRight
+	//     top_gateway:B -- T:junctionRight
+	//     bottom_gateway:T -- B:junctionRight
+	//```
+}

mermaid/er/entity.go

@@ -24,12 +24,12 @@ func (e *Entity) string() string {
 
 	return fmt.Sprintf(
 		"%s%s {%s%s%s%s}",
-		"	", // indent
+		"    ", // indent
 		e.Name,
 		internal.LineFeed(),
 		strings.Join(attrs, internal.LineFeed()),
 		internal.LineFeed(),
-		"	", // indent
+		"    ", // indent
 	)
 }
 
@@ -70,7 +70,7 @@ func (a *Attribute) string() string {
 		keys = append(keys, "UK")
 	}
 
-	s := fmt.Sprintf("		%s %s %s \"%s\"", a.Type, a.Name, strings.Join(keys, ","), a.Comment)
+	s := fmt.Sprintf("        %s %s %s \"%s\"", a.Type, a.Name, strings.Join(keys, ","), a.Comment)
 	s = strings.TrimSuffix(s, " ")
 	return strings.ReplaceAll(s, "\"\"", "")
 }
@@ -84,7 +84,7 @@ func (a *Attribute) string() string {
 func (d *Diagram) Relationship(leftE, rightE Entity, leftR, rightR Relationship, identidy Identify, comment string) *Diagram {
 	d.body = append(
 		d.body,
-		fmt.Sprintf("	%s %s%s%s %s : \"%s\"",
+		fmt.Sprintf("    %s %s%s%s %s : \"%s\"",
 			leftE.Name,
 			leftR.string(left),
 			identidy.string(),

mermaid/er/entity_relationship_test.go

@@ -133,25 +133,25 @@ func TestDiagram_Build(t *testing.T) {
 		}
 
 		want := `erDiagram
-	teachers ||--o{ students : "Teacher has many students"
-	teachers }|..|| schools : "School has many teachers"
-	personal_computers {
-		int id PK,UK "Personal Computer ID"
-	}
-	schools {
-		int id PK,UK "School ID"
-		string name  "School Name"
-		int teacher_id FK,UK "Teacher ID"
-	}
-	students {
-		int id PK,UK "Student ID"
-		string name  "Student Name"
-		int teacher_id FK,UK "Teacher ID"
-	}
-	teachers {
-		int id PK,UK "Teacher ID"
-		string name  "Teacher Name"
-	}
+    teachers ||--o{ students : "Teacher has many students"
+    teachers }|..|| schools : "School has many teachers"
+    personal_computers {
+        int id PK,UK "Personal Computer ID"
+    }
+    schools {
+        int id PK,UK "School ID"
+        string name  "School Name"
+        int teacher_id FK,UK "Teacher ID"
+    }
+    students {
+        int id PK,UK "Student ID"
+        string name  "Student Name"
+        int teacher_id FK,UK "Teacher ID"
+    }
+    teachers {
+        int id PK,UK "Teacher ID"
+        string name  "Teacher Name"
+    }
 `
 		want = strings.ReplaceAll(want, "\r\n", "\n")
 		got := strings.ReplaceAll(b.String(), "\r\n", "\n")