3 Add support for mermaid diagrams

Makefile

@@ -5,6 +5,9 @@ LDFLAGS="-s -w ${LDFLAGS_OPT}"
 
 all: build format lint ## Format, lint and build
 
+run: ## Run
+	go run main.go
+
 build: ## Build
 	go build -o bin/go-grip main.go
 

README.md

@@ -19,10 +19,20 @@
 * 📱 Dark and white mode
 * 🎨 Syntax highlighting for code 
 * [x] Todo list like the one on GitHub
+* Support for mermaid diagrams
+
+```mermaid
+graph TD;
+      A-->B;
+      A-->C;
+      B-->D;
+      C-->D;
+```
 
 > [!TIP]
 > Support of blockquotes (note, tip, important, warning and caution) [see here](https://github.com/orgs/community/discussions/16925)
 
+
 ## 🚀 Getting started
 
 To install go-grip, simply:

defaults/templates/mermaid/mermaid.html

@@ -0,0 +1,16 @@
+<div>
+  <div class="mermaid">
+    {{ .Content }}
+  </div>
+
+  <script src="/static/js/mermaid.min.js"></script>
+  {{if .Darkmode }}
+  <script>
+    mermaid.initialize({startOnLoad:true, theme: 'dark'});
+  </script>
+  {{else}}
+  <script>
+    mermaid.initialize({startOnLoad:true, theme: 'default'});
+  </script>
+  {{end}}
+</div>

pkg/parser.go

@@ -57,6 +57,15 @@ func renderHookCodeBlock(w io.Writer, node ast.Node, dark bool) (ast.WalkStatus,
 		style = "github"
 	}
 
+	if string(block.Info) == "mermaid" {
+		m, err := renderMermaid(string(block.Literal), dark)
+		if err != nil {
+			log.Println("Error:", err)
+		}
+		fmt.Fprint(w, m)
+		return ast.GoToNext, true
+	}
+
 	err := quick.Highlight(w, string(block.Literal), string(block.Info), "html", style)
 	if err != nil {
 		log.Println("Error:", err)
@@ -198,3 +207,25 @@ func createBlockquoteStart(alert string) (string, error) {
 	}
 	return tpl.String(), nil
 }
+
+type Mermaid struct {
+	Content  string
+	Darkmode bool
+}
+
+func renderMermaid(content string, darkmode bool) (string, error) {
+	m := Mermaid{
+		Content:  content,
+		Darkmode: darkmode,
+	}
+	lp := filepath.Join("templates/mermaid/mermaid.html")
+	tmpl, err := template.ParseFS(defaults.Templates, lp)
+	if err != nil {
+		return "", err
+	}
+	var tpl bytes.Buffer
+	if err := tmpl.Execute(&tpl, m); err != nil {
+		return "", err
+	}
+	return tpl.String(), nil
+}