From 7b2e950a4c35538fc359d7106022403e96883bca Mon Sep 17 00:00:00 2001
From: Joel Marcey <joelm@fb.com>
Date: Tue, 24 Oct 2017 19:09:34 -0700
Subject: [PATCH] Add previous and next titles to metadata props

---
 lib/core/DocsLayout.js     |  6 +++---
 lib/server/readMetadata.js | 11 +++++++++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/lib/core/DocsLayout.js b/lib/core/DocsLayout.js
index 194360ad2e..1ae8f84214 100644
--- a/lib/core/DocsLayout.js
+++ b/lib/core/DocsLayout.js
@@ -17,7 +17,7 @@ class DocsLayout extends React.Component {
   render() {
     const metadata = this.props.metadata;
     const content = this.props.children;
-    const i18n = translation[this.props.metadata.language];
+    const i18n = false; //translation[this.props.metadata.language];
     let DocComponent = Doc;
     if (this.props.Doc) {
       DocComponent = this.props.Doc;
@@ -68,7 +68,7 @@ class DocsLayout extends React.Component {
                         "localized-strings"
                       ]["previous"] ||
                       "Previous"
-                    : metadata[metadata.previous_id].title || "Previous"
+                    : metadata.previous_title || "Previous"
                   }
                 </a>
               )}
@@ -84,7 +84,7 @@ class DocsLayout extends React.Component {
                         "localized-strings"
                       ]["next"] ||
                       "Next"
-                    : metadata[metadata.next_id].title || "Next"
+                    : metadata.next_title || "Next"
                   }{" "}
                   →
                 </a>
diff --git a/lib/server/readMetadata.js b/lib/server/readMetadata.js
index 792afc9a5c..cf60cc2736 100644
--- a/lib/server/readMetadata.js
+++ b/lib/server/readMetadata.js
@@ -289,6 +289,17 @@ function generateMetadataDocs() {
     metadatas[metadata.id] = metadata;
   });
 
+  // Get the titles of the previous and next ids so that we can use them in
+  // navigation buttons in DocsLayout.js
+  Object.keys(metadatas).forEach(function(metadata) {
+    if (metadatas[metadata].previous) {
+      metadatas[metadata].previous_title = metadatas[metadatas[metadata].previous].title;
+    }
+    if (metadatas[metadata].next) {
+      metadatas[metadata].next_title = metadatas[metadatas[metadata].next].title;
+    }
+  });
+
   fs.writeFileSync(
     __dirname + "/../core/metadata.js",
     "/**\n" +