adds the guaraci namespace to the library/api.php file

library/api.php

 <?php
+namespace guaraci;
+
 require 'modules/facebook/index.php';
 
 // Facebook
@@ -14,7 +16,7 @@ function get_facebook_shares( $data ) {
     
     $post_id = $data['post_id'];
 
-    if( guaraci\need_share_update( $post_id ) ) {
+    if( need_share_update( $post_id ) ) {
         $response = wp_remote_get( add_query_arg( array( 
             //'id' => urlencode( get_permalink( $post_id ) ),
             'id' => urlencode( 'https://www.google.com/' ),
@@ -24,17 +26,17 @@ function get_facebook_shares( $data ) {
 
 
         if ( !is_array($response) || is_wp_error( $response ) || $response['response']['code'] != 200){
-            return guaraci\get_post_shares( $post_id );
+            return get_post_shares( $post_id );
         }
         
         $body = json_decode( $response['body'] );
         $count = intval( $body->engagement->share_count );
 
         // Update post meta
-        guaraci\set_post_shares( $post_id, $count );
+        set_post_shares( $post_id, $count );
         
     } else {
-        $count = guaraci\get_post_shares( $post_id );
+        $count = get_post_shares( $post_id );
     }
 
 
@@ -44,6 +46,6 @@ function get_facebook_shares( $data ) {
 add_action( 'rest_api_init', function () {
     register_rest_route( 'guaraci/facebook', '/shares/(?P<post_id>\d+)', array(
     'methods' => 'GET',
-    'callback' => 'get_facebook_shares',
+    'callback' => 'guaraci\get_facebook_shares',
     ) );
 } );