From 8a0fbf03e6be6af3a64c71a5b0c8514a75258992 Mon Sep 17 00:00:00 2001
From: "Theodore R. Smith" <theodore@phpexperts.pro>
Date: Wed, 31 Oct 2018 20:23:59 -0500
Subject: [PATCH] (#134) Added nginx-based auto-language negotiation for /.

**The Problem:** Upon following the directions to the letter, when I
go to http://localhost:8080/ I get a 403: Forbidden nginx error screen.

**The Reason:** No language detection / negotiation is done, and / is empty.

**The Solution:** I added nginx-based language negotiation using the browser's
`Accept-Language` header. If the user does not set a header (some search engines,
curl, etc.), it will show the English page.

This only applies to the / route. It is assumed that any other route will be in
the desired language.

Fixes #134.
---
 containers/nginx/dev.conf   | 16 +++++++++++++++-
 containers/nginx/minds.conf | 14 ++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/containers/nginx/dev.conf b/containers/nginx/dev.conf
index b0858f0888..6b095b08cc 100644
--- a/containers/nginx/dev.conf
+++ b/containers/nginx/dev.conf
@@ -1,3 +1,12 @@
+# Dynamic language redirection.
+# Ensure that "en" is last, or people with, for instance, "fr en" will always default to "en".
+map $http_accept_language $lang {
+    default en;
+    ~es es;
+    ~fr fr;
+    ~en en;
+}
+
 server {
     listen 80;
     listen [::]:80 default ipv6only=on;
@@ -24,6 +33,11 @@ server {
         port_in_redirect off;
     }
 
+    # Redirect to the language directory specified by the user's browser via the Accept-Language header.
+    location ~ ^/$ {
+        return 301 $scheme://$http_host$1/$lang/;
+    }
+
     location ~ ^(/api|/fs|/icon|/carousel) {
         add_header 'Access-Control-Allow-Origin' "$http_origin";
         add_header 'Access-Control-Allow-Credentials' 'true';
@@ -98,4 +112,4 @@ server {
         log_not_found off;
         deny all;
     }
-}
\ No newline at end of file
+}
diff --git a/containers/nginx/minds.conf b/containers/nginx/minds.conf
index baed6df5f7..51ae3df3f4 100644
--- a/containers/nginx/minds.conf
+++ b/containers/nginx/minds.conf
@@ -1,3 +1,12 @@
+# Dynamic language redirection.
+# Ensure that "en" is last, or people with, for instance, "fr en" will always default to "en".
+map $http_accept_language $lang {
+    default en;
+    ~es es;
+    ~fr fr;
+    ~en en;
+}
+
 server {
     listen 80;
     listen [::]:80 default ipv6only=on;
@@ -25,6 +34,11 @@ server {
         port_in_redirect off;
     }
 
+    # Redirect to the language directory specified by the user's browser via the Accept-Language header.
+    location ~ ^/$ {
+        return 301 $scheme://$http_host$1/$lang/;
+    }
+
     location ~ ^(/api|/fs|/icon|/carousel) {
         add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";
         add_header 'Access-Control-Allow-Origin' "$http_origin";