From b47912203cf4a14704721d6e78cc441ca0ec001f Mon Sep 17 00:00:00 2001
From: Marcel Schramm <marceloschr@googlemail.com>
Date: Sat, 28 Dec 2024 00:26:15 +0100
Subject: [PATCH] Disable index by default

---
 fly.toml                               |  1 +
 internal/config/config.go              |  3 +++
 internal/frontend/http.go              |  3 +++
 internal/frontend/index.go             | 13 +++++++------
 internal/frontend/templates/index.html |  2 ++
 5 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/fly.toml b/fly.toml
index 3249f833..1b3070eb 100644
--- a/fly.toml
+++ b/fly.toml
@@ -16,6 +16,7 @@ strategy = "immediate"
 
 [env]
 ROOT_URL = "https://scribblers.bios-marcel.link"
+ALLOW_INDEXING = true
 SERVE_DIRECTORIES = ":/public"
 LOBBY_SETTING_BOUNDS_MAX_MAX_PLAYERS = 100
 
diff --git a/internal/config/config.go b/internal/config/config.go
index 0dfc4c65..60ea35ca 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -57,6 +57,9 @@ type Config struct {
 	// CanonicalURL specifies the original domain, in case we are accessing the
 	// site via some other domain, such as scribblers.fly.dev
 	CanonicalURL string `env:"CANONICAL_URL"`
+	// AllowIndexing will control whether the noindex, nofollow meta tag is
+	// added to the home page.
+	AllowIndexing bool `env:"ALLOW_INDEXING"`
 	// ServeDirectories is a map of `path` to `directory`. All directories are
 	// served under the given path.
 	ServeDirectories map[string]string `env:"SERVE_DIRECTORIES"`
diff --git a/internal/frontend/http.go b/internal/frontend/http.go
index cf26874d..0888c7c3 100644
--- a/internal/frontend/http.go
+++ b/internal/frontend/http.go
@@ -54,6 +54,9 @@ type BasePageConfig struct {
 	// CanonicalURL specifies the original domain, in case we are accessing the
 	// site via some other domain, such as scribblers.fly.dev
 	CanonicalURL string `json:"canonicalUrl"`
+	// AllowIndexing will control whether the noindex, nofollow meta tag is
+	// added to the home page.
+	AllowIndexing bool `env:"ALLOW_INDEXING"`
 }
 
 var fallbackChecksum = uuid.Must(uuid.NewV4()).String()
diff --git a/internal/frontend/index.go b/internal/frontend/index.go
index 52281fe2..77509931 100644
--- a/internal/frontend/index.go
+++ b/internal/frontend/index.go
@@ -45,12 +45,13 @@ type SSRHandler struct {
 
 func NewHandler(cfg *config.Config) (*SSRHandler, error) {
 	basePageConfig := &BasePageConfig{
-		checksums:    make(map[string]string),
-		hash:         md5.New(),
-		Version:      version.Version,
-		Commit:       version.Commit,
-		RootURL:      cfg.RootURL,
-		CanonicalURL: cfg.CanonicalURL,
+		checksums:     make(map[string]string),
+		hash:          md5.New(),
+		Version:       version.Version,
+		Commit:        version.Commit,
+		RootURL:       cfg.RootURL,
+		CanonicalURL:  cfg.CanonicalURL,
+		AllowIndexing: cfg.AllowIndexing,
 	}
 	if cfg.RootPath != "" {
 		basePageConfig.RootPath = "/" + cfg.RootPath
diff --git a/internal/frontend/templates/index.html b/internal/frontend/templates/index.html
index 1991dece..42ccd313 100644
--- a/internal/frontend/templates/index.html
+++ b/internal/frontend/templates/index.html
@@ -12,6 +12,8 @@
             skribbl.io, scribble, scribblers, scribble.rs, pictionary,
             montagsmaler, sketchful, draw and guess, drawmything, free, oss">
     <link rel="canonical" href="{{.CanonicalURL}}" />
+    {{if not .AllowIndexing}}
+    <meta name="robots" content="noindex, nofollow">{{end}}
     {{if ne "" .RootURL}}
     <meta property="og:image" content="{{.RootURL}}{{.RootPath}}/resources/logo.png">
     <meta property="og:image:type" content="image/png">