Initial commit of libmkwebpage

1 files changed, 70 insertions, 0 deletions

diff --git a/templates.go b/templates.go
new file mode 100644
index 0000000..00c1b31
--- /dev/null
+++ b/templates.go
@@ -0,0 +1,70 @@
+package libmkwebpage
+
+import (
+	"bytes"
+	"embed"
+	"fmt"
+	"html/template"
+	"io/fs"
+	"net/http"
+)
+
+type templates struct {
+	staticRoot    embed.FS
+	dynamicRoot   fs.FS
+	errorTemplate string
+	bindings      template.FuncMap
+}
+
+func (w *Webpage) getTemplateRoot() fs.FS {
+	if w.isDynamic() {
+		return w.templates.dynamicRoot
+	}
+	return w.templates.staticRoot
+}
+
+func (w *Webpage) NewTemplates(static embed.FS, dynamic fs.FS) *Webpage {
+	w.templates = templates{staticRoot: static, dynamicRoot: dynamic, bindings: template.FuncMap{}}
+	return w
+}
+func (w *Webpage) SetErrorTemplate(path string) {
+	w.templates.errorTemplate = path
+}
+func (w *Webpage) Error(writer http.ResponseWriter, code int, err error) {
+	writer.WriteHeader(code)
+	if w.templates.errorTemplate == "" {
+		fmt.Fprintln(writer, err)
+	}
+}
+func (w *Webpage) InternalServerError(writer http.ResponseWriter, err error) {
+	w.Error(writer, http.StatusInternalServerError, err)
+}
+func (w *Webpage) BadRequest(writer http.ResponseWriter, err error) {
+	w.Error(writer, http.StatusInternalServerError, err)
+}
+func (w *Webpage) BindTemplateFunc(name string, fun any) *Webpage {
+	w.templates.bindings[name] = fun
+	return w
+}
+
+func (w *Webpage) RenderTemplate(writer http.ResponseWriter, name string, data any) {
+	writer.Header().Set("Content-Type", "text/html; charset=utf-8")
+	tmpl, err := fs.ReadFile(w.getTemplateRoot(), "templates/"+name+".tmpl")
+	if err != nil {
+		panic(err)
+	}
+	if err := template.Must(template.New("templates/"+name+".tmpl").Funcs(w.templates.bindings).Parse(string(tmpl))).Execute(writer, data); err != nil {
+		panic(err)
+	}
+}
+func (w *Webpage) RenderTemplateToString(name string, data any) string {
+	buf := bytes.NewBuffer(nil)
+	tmpl, err := fs.ReadFile(w.getTemplateRoot(), "templates/"+name+".tmpl")
+	if err != nil {
+		panic(err)
+	}
+	if err := template.Must(template.New("templates/"+name+".tmpl").Funcs(w.templates.bindings).Parse(string(tmpl))).Execute(buf, data); err != nil {
+		panic(err)
+	}
+	return buf.String()
+}