Added API method for getting a single appointment.

src/application/controllers/api/v1/Appointments.php

@@ -45,13 +45,19 @@ class Appointments extends API_V1_Controller {
      * @param int $id Optional (null), the record ID to be returned.
      */
     public function get($id = null) {
-        $appointments = $this->appointments_model->get_batch(); 
-
+        $condition = $id !== null ? 'id = ' . $id : null;
+        
+        $appointments = $this->appointments_model->get_batch($condition); 
+        
         $response = new Response($appointments); 
 
-        $status = new NonEmptyString('200 OK');
+        $response->format($this->formatter)->search()->sort()->paginate()->minimize();
 
-        $response->format($this->formatter)->search()->sort()->paginate()->minimize()->output();
+        if ($id !== null) {
+            $response->singleEntry();
+        }
+
+        $response->output();
     }
 
     /**

src/engine/Api/V1/Response.php

@@ -98,6 +98,19 @@ class Response {
         return $this;
     }
 
+    /**
+     * Return a single entry instead of an array of entries. 
+     *
+     * This is useful whenever the client requests only a single entry. 
+     *
+     * @return \EA\Engine\Api\V1\Response
+     */
+    public function singleEntry() {
+        $this->response = array_shift($this->response);
+
+        return $this;
+    }
+
     /**
      * Output the response as a JSON with the provided status header. 
      *