From d6c118a7603b7c5c00b9c25aff53a5cf74935815 Mon Sep 17 00:00:00 2001
From: Peter Hartree <web@peterhartree.co.uk>
Date: Thu, 17 Jul 2014 13:35:25 +0000
Subject: [PATCH 1/2] Add `previous_post_title` and `next_post_title`
 properties to the `get_post` response object

---
 controllers/core.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/controllers/core.php b/controllers/core.php
index a3dda64..12003e4 100644
--- a/controllers/core.php
+++ b/controllers/core.php
@@ -72,9 +72,11 @@ public function get_post() {
       );
       if ($previous) {
         $response['previous_url'] = get_permalink($previous->ID);
+        $response['previous_post_title'] = $previous->post_title;
       }
       if ($next) {
         $response['next_url'] = get_permalink($next->ID);
+        $response['next_post_title'] = $next->post_title;
       }
       return $response;
     } else {

From 03485da44f8444ebc3bc007ba97cc2305f68c75f Mon Sep 17 00:00:00 2001
From: Peter Hartree <web@peterhartree.co.uk>
Date: Sat, 26 Jul 2014 19:20:53 +0000
Subject: [PATCH 2/2] Add simple caching mechanism

Use the WordPress Transients API to cache API requests for non-logged in users. This will significantly speed up API requests and reduce server load. You might want to tweak the cache time on line 84 - for high traffic sites, a cache duration of just a few minutes will be enough to achieve significant performance gains.
---
 singletons/api.php | 35 +++++++++++++++++++++++++++++++++--
 1 file changed, 33 insertions(+), 2 deletions(-)

diff --git a/singletons/api.php b/singletons/api.php
index baeb506..e555d13 100644
--- a/singletons/api.php
+++ b/singletons/api.php
@@ -50,8 +50,39 @@ function template_redirect() {
           $this->error('Not found');
         }
         
-        // Run the method
-        $result = $this->controller->$method();
+        // Build transient slug using method (and query params if set)
+        $transient_slug = 'json-api-';
+        $transient_slug .= $method;
+
+        $url = parse_url($_SERVER['REQUEST_URI']);
+
+        if($url['query'] !== null):
+          $args = wp_parse_args($url['query']);
+          $transient_slug .= '-' . implode('-', array_keys($args));
+          $transient_slug .= '-' . implode('-', $args);
+        endif;
+
+        // Transient slug must be less than 45 characters (http://codex.wordpress.org/Transients_API)
+        if(strlen($transient_slug) > 40):
+          $transient_slug = 'json-api-' . md5($transient_slug);
+        endif;
+
+        if ( is_user_logged_in() ):
+          // Never show cached content to a logged-in user
+          $cached = false;
+        else:
+          // Check for cached value
+          $cached = get_transient($transient_slug);
+        endif;
+
+        if($cached !== false):
+          // Use the cached result
+          $result = $cached;
+        else:
+          // Run the method and cache result for 24 hours
+          $result = $this->controller->$method();
+          set_transient( $transient_slug, $result, 24 * 3600 );
+        endif;
         
         // Handle the result
         $this->response->respond($result);