1 files changed, 53 insertions, 0 deletions
diff --git a/app/templates.go b/app/templates.go
new file mode 100644
index 0000000..4583254
--- /dev/null
+++ b/app/templates.go
@@ -0,0 +1,53 @@
+package app
+
+import (
+	"bytes"
+	"fmt"
+	"html/template"
+	"io"
+	"log"
+	"sync"
+)
+
+type templateMap map[string]*template.Template
+
+type templateStore struct {
+	sync.Mutex
+
+	base      string
+	templates templateMap
+}
+
+func newTemplateStore(base string) *templateStore {
+	return &templateStore{
+		base:      base,
+		templates: make(templateMap),
+	}
+}
+
+func (t *templateStore) Add(name string, template *template.Template) {
+	t.Lock()
+	defer t.Unlock()
+
+	t.templates[name] = template
+}
+
+func (t *templateStore) Exec(name string, ctx interface{}) (io.WriterTo, error) {
+	t.Lock()
+	defer t.Unlock()
+
+	template, ok := t.templates[name]
+	if !ok {
+		log.Printf("template %s not found", name)
+		return nil, fmt.Errorf("no such template: %s", name)
+	}
+
+	buf := bytes.NewBuffer([]byte{})
+	err := template.ExecuteTemplate(buf, t.base, ctx)
+	if err != nil {
+		log.Printf("error parsing template %s: %s", name, err)
+		return nil, err
+	}
+
+	return buf, nil
+}