Setting up routes and building a render function

cmd/web/handlers.go

@@ -0,0 +1,7 @@
+package main
+
+import "net/http"
+
+func (app *application) VirtualTerminal(w http.ResponseWriter, r *http.Request) {
+	return
+}

cmd/web/render.go

@@ -0,0 +1,99 @@
+package main
+
+import (
+	"embed"
+	"fmt"
+	"html/template"
+	"net/http"
+	"strings"
+)
+
+type templateData struct {
+	StringMap       map[string]string
+	IntMap          map[string]int
+	FloatMap        map[string]int
+	Data            map[string]interface{}
+	CSRFToken       string
+	Flash           string
+	Warning         string
+	Error           string
+	API             string
+	CSSVersion      string
+	IsAuthenticated int
+}
+
+var functions = template.FuncMap{}
+
+//go:embed templates
+var templateFS embed.FS
+
+func (app *application) addDefaultData(td *templateData, r *http.Request) *templateData {
+	return nil
+}
+
+func (app *application) renderTemplate(
+	w http.ResponseWriter,
+	r *http.Request,
+	page string,
+	td *templateData,
+	partials ...string,
+) error {
+	var t *template.Template
+	var err error
+	templateToRender := fmt.Sprintf("templates/%s.page.tmpl", page)
+
+	_, templateInMap := app.templateCache[templateToRender]
+
+	if app.config.env == "production" && templateInMap {
+		t = app.templateCache[templateToRender]
+	} else {
+		t, err = app.parseTemplate(partials, page, templateToRender)
+		if err != nil {
+			app.errorLog.Println(err)
+			return err
+		}
+	}
+
+	if td == nil {
+		td = &templateData{}
+	}
+
+	td = app.addDefaultData(td, r)
+
+	err = t.Execute(w, td)
+	if err != nil {
+		app.errorLog.Println(err)
+		return err
+	}
+
+	return nil
+}
+
+func (app *application) parseTemplate(
+	partials []string,
+	page, templateToRender string,
+) (*template.Template, error) {
+	var t *template.Template
+	var err error
+
+	// build partials
+	if len(partials) > 0 {
+		for i, x := range partials {
+			partials[i] = fmt.Sprintf("tempaltes/%s.partial.tmpl", x)
+		}
+		t, err = template.New(fmt.Sprintf("%s.page.tmpl", page)).
+			Funcs(functions).
+			ParseFS(templateFS, "templates/base.layout.tmpl", strings.Join(partials, ","), templateToRender)
+	} else {
+		t, err = template.New(fmt.Sprintf("%s.page.tmpl", page)).
+			Funcs(functions).
+			ParseFS(templateFS, "templates/base.layout.tmpl", templateToRender)
+	}
+	if err != nil {
+		app.errorLog.Println(err)
+		return nil, err
+	}
+
+	app.templateCache[templateToRender] = t
+	return t, nil
+}

cmd/web/routes.go

@@ -8,5 +8,8 @@ import (
 
 func (app *application) routes() http.Handler {
 	mux := chi.NewRouter()
+
+	mux.Get("/virtual-terminal", app.VirtualTerminal)
+
 	return mux
 }

cmd/web/templates/base.layout.tmpl

@@ -0,0 +1,3 @@
+{{define "base"}}
+
+{{end}}

go.mod

@@ -1,5 +1,5 @@
 module myapp
 
-go 1.21.0
+go 1.22.5
 
 require github.com/go-chi/chi/v5 v5.1.0