Added updater

postino.php

@@ -2,13 +2,19 @@
 /**
  * Plugin Name: Postino
  * Description: A new breath of life to wp_mail.
- * Version:     1.0.0
+ * Version:     1.0.1
  * Author:      Simone Montali @ Caffeina
  * Author URI:  https://caffeina.com/
+ * Plugin URI:  https://github.com/simmontali/postino
  */
+//namespace Postino;
 
-defined('ABSPATH') or die('No script kiddies please!');
 require 'PHPMailer/class.phpmailer.php';
+require 'updater.php';
+
+use Postino\Updater;
+
+defined('ABSPATH') or die('No script kiddies please!');
 
 
 if (!function_exists('wp_mail')) {
@@ -114,4 +120,5 @@ function () use ($type, $message) {
     add_action('admin_menu', 'register_menu_entry');
     add_action('admin_init', 'register_settings');
     add_action('admin_init', 'check_if_options_exist');
-}
+    (new Updater())->bootUpdateService();
+}

updater.php

@@ -0,0 +1,145 @@
+<?php
+
+namespace Postino;
+
+class Updater 
+{
+    protected $config;
+    protected $github;
+
+
+    public function __construct()
+    {
+        $this->config = [
+            'slug' => 'postino/postino.php',
+            'proper_folder_name' => 'postino'
+        ];
+        $this->github = [
+            'user' => 'simmontali',
+            'repository' => 'postino'
+        ];
+    }
+
+    public function bootUpdateService()
+    {
+        // define the alternative API for updating checking
+        add_filter("pre_set_site_transient_update_plugins", array($this, "checkVersion"));
+        // Define the alternative response for information checking
+        add_filter("plugins_api", array($this, "setPluginInfo"), 10, 3);
+        // reactivate plugin
+        add_filter("upgrader_post_install", array($this, "postInstall"), 10, 3);
+    }
+    private function getPluginData()
+    {
+        if (isset($this->pluginData)) {
+            return $this->pluginData;
+        }
+
+        include_once ABSPATH.'/wp-admin/includes/plugin.php';
+
+        $this->pluginData = get_plugin_data(WP_PLUGIN_DIR.'/'.$this->config['slug']);
+        $githubUrl = parse_url($this->pluginData["PluginURI"]);
+        $githubInfo = explode('/', $githubUrl['path']);
+
+        $this->github = [
+          "user" => $githubInfo[1],
+          "repository" => $githubInfo[2]
+        ];
+    }
+
+    private function getRepoReleaseInfo() 
+    {
+        // Only do this once
+        if (!empty($this->githubAPIResult)) {
+            return;
+        }
+
+        $transient = get_transient("{$this->github["user"]}_{$this->github["repository"]}_transient_update");
+        if ($transient !== false) {
+            return $transient;
+        }
+        // Query the GitHub API
+        $url = "https://api.github.com/repos/{$this->github["user"]}/{$this->github["repository"]}/releases";
+
+        // Get the results
+        $this->githubAPIResult = wp_remote_retrieve_body(wp_remote_get($url));
+        if (!empty($this->githubAPIResult)) {
+            $this->githubAPIResult = @json_decode($this->githubAPIResult);
+        }
+        // Use only the latest release
+        if (is_array($this->githubAPIResult)) {
+            $this->githubAPIResult = $this->githubAPIResult[0];
+        }
+        set_transient("{$this->github["user"]}_{$this->github["repository"]}_transient_update", $this->githubAPIResult, 3.600);
+    }
+
+    public function checkVersion( $transient ) 
+    {
+        if (!empty($transient)&& empty($transient->checked)) {
+            return $transient;
+        }
+        // Get plugin & GitHub release information
+        $this->getPluginData();
+        $this->getRepoReleaseInfo();
+
+        if (!isset($this->githubAPIResult->tag_name)) {
+            return $transient;
+        }
+        $doUpdate = version_compare($this->githubAPIResult->tag_name, $transient->checked[$this->config['slug']]);
+
+        if ($doUpdate == 1) {
+            $package = $this->githubAPIResult->zipball_url;
+            // Include the access token for private GitHub repos
+            if (!empty($this->config["access_token"])) {
+                $package = add_query_arg(array("access_token" => $this->config["access_token"]), $package);
+            }
+
+            $obj = new \StdClass();
+            $obj->slug = $this->config["slug"];
+            $obj->new_version = $this->githubAPIResult->tag_name;
+            $obj->url = $this->pluginData["PluginURI"];
+            $obj->package = $package;
+            $obj->plugin = $this->config["slug"];
+            $transient->response[$this->config["slug"]] = $obj;
+        }
+        return $transient;
+    }
+    public function setPluginInfo( $false, $action, $response ) {
+        // Get plugin & GitHub release information
+        $this->getPluginData();
+        $this->getRepoReleaseInfo();
+
+        // If nothing is found, do nothing
+        if (empty($response->slug) || $response->slug != $this->config["slug"]) {
+            return false;
+        }
+        // Add our plugin information
+        $response->last_updated = $this->githubAPIResult->published_at;
+        $response->slug = $this->config["slug"];
+        $response->name = $this->pluginData["Name"];
+        $response->plugin_name  = $this->pluginData["Name"];
+        $response->version = $this->githubAPIResult->tag_name;
+        $response->author = $this->pluginData["AuthorName"];
+        $response->homepage = $this->pluginData["PluginURI"];
+
+            $response->sections = array( 'description' =>$this->githubAPIResult->body);
+        // This is our release download zip file
+        $downloadLink = $this->githubAPIResult->zipball_url;
+        $response->download_link = $downloadLink;
+        return $response;
+    }
+    public function postInstall( $true, $hook_extra, $result ) 
+    {
+        global $wp_filesystem;
+        // Move & Activate
+        $proper_destination = WP_PLUGIN_DIR.'/'.$this->config['proper_folder_name'];
+        $wp_filesystem->move($result['destination'], $proper_destination);
+        $result['destination'] = $proper_destination;
+        $activate = activate_plugin(WP_PLUGIN_DIR.'/'.$this->config['slug']);
+        // Output the update message
+        $fail  = __('The plugin has been updated, but could not be reactivated. Please reactivate it manually.', 'github_plugin_updater');
+        $success = __('Plugin reactivated successfully.', 'github_plugin_updater');
+        echo is_wp_error($activate) ? $fail : $success;
+        return $result;
+    }
+}