feat: title on pages

internal/pkg/templer/header.go

@@ -0,0 +1,48 @@
+package templer
+
+import (
+	"context"
+)
+
+// GetHeader returns a slice of strings that should be added to the html head.
+// Because strings are immutable a slice of strings is used.
+func GetHeader(ctx context.Context) []string {
+	v := ctx.Value(headerKey)
+	if v == nil {
+		return []string{}
+	}
+
+	header, ok := v.([]string)
+	if !ok {
+		return []string{}
+	}
+	return header
+}
+
+// AppendHeader lets you add lines to the header.
+func AppendHeader(ctx context.Context, v ...string) context.Context {
+	header := GetHeader(ctx)
+
+	header = append(header, v...)
+
+	return context.WithValue(ctx, headerKey, header)
+}
+
+// AppendHeader lets you add lines to the header.
+func PageTitle(ctx context.Context, title string) context.Context {
+	return context.WithValue(ctx, titleKey, title)
+}
+
+// AppendHeader lets you add lines to the header.
+func GetTitle(ctx context.Context, main string) string {
+	v := ctx.Value(titleKey)
+	if v == nil {
+		return main
+	}
+
+	title, ok := v.(string)
+	if !ok {
+		return main
+	}
+	return title + " | " + main
+}

internal/pkg/templer/middleware.go

@@ -11,6 +11,8 @@ type ctxKey int
 
 const (
 	pathKey ctxKey = iota
+	headerKey
+	titleKey
 )
 
 func Middleware(next http.Handler) http.HandlerFunc {