First structure.

assets/js/admin.js

@@ -0,0 +1,3 @@
+jQuery( document ).ready( function ( e ) {
+
+});

assets/js/public.js

@@ -0,0 +1,3 @@
+jQuery( document ).ready( function ( e ) {
+
+});

index.php

@@ -0,0 +1,3 @@
+<?php
+
+// Silence is golden

lang/mailpoet.pot

@@ -0,0 +1,13 @@
+# Copyright (C) 2014 WordPress Plugin Template
+# This file is distributed under the same license as the WordPress Plugin Template package.
+msgid ""
+msgstr ""
+"Project-Id-Version: MailPoet\n"
+"Report-Msgid-Bugs-To: http://mailpoet.com\n"
+"POT-Creation-Date: 2014-04-07 11:28:06+00:00\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"PO-Revision-Date: 2014-MO-DA HO:MI+ZONE\n"
+"Last-Translator: MAILPOET <info@mailpoet.com>\n"
+"Language-Team: MAILPOET <info@mailpoet.com>\n"

lib/mailpoet.php

@@ -0,0 +1,155 @@
+<?php
+if (!defined('ABSPATH')) exit;
+
+class MailPoet {
+
+  public $version;
+  public $shortname;
+  public $file;
+  public $dir;
+  public $assets_dir;
+  public $assets_url;
+
+
+  public function __construct ($params = array(
+    'file' => '',
+    'version' => '1.0.0'
+  )) {
+
+  $this->version = $params['version'];
+  $this->shortname = 'mailpoet';
+  $this->file = $params['file'];
+  $this->dir = dirname($this->file);
+  $this->assets_dir = $this->dir . 'assets/';
+  $this->assets_url = plugins_url(
+    '/assets/',
+    $this->file
+  );
+
+  register_activation_hook(
+    $this->file,
+    array($this, 'install')
+  );
+
+  // public assets
+  add_action(
+    'wp_enqueue_scripts',
+    array($this, 'public_css'),
+    10
+  );
+  add_action(
+    'wp_enqueue_scripts',
+    array($this, 'public_js'),
+    10
+  );
+
+  // admin assets
+  add_action(
+    'admin_enqueue_scripts',
+    array($this, 'admin_css'),
+    10,
+    1
+  );
+  add_action(
+    'admin_enqueue_scripts',
+    array($this, 'admin_js'),
+    10,
+    1
+  );
+
+  // localization
+  $this->setup_textdomain();
+  add_action(
+    'init',
+    array($this, 'localize'),
+    0
+  );
+  }
+
+  public function public_css() {
+    $name = $this->shortname . '-public';
+
+    wp_register_style(
+      $name,
+      $this->assets_url . 'css/public.css',
+      array(),
+      $this->version
+    );
+    wp_enqueue_style($name);
+  }
+
+  public function public_js() {
+    $name = $this->shortname . '-public';
+    wp_register_script(
+      $name,
+      $this->assets_url . 'js/public.js',
+      array('jquery'),
+      $this->version
+    );
+    wp_enqueue_script($name);
+  }
+
+  public function admin_css($hook = '') {
+    $name = $this->shortname . '-admin';
+    wp_register_style(
+      $name,
+      $this->assets_url . 'css/admin.css',
+      array(), $this->version
+    );
+    wp_enqueue_style($name);
+  }
+
+  public function admin_js($hook = '') {
+    $name = $this->shortname . '-admin';
+    wp_register_script(
+      $this->shortname . '-admin',
+      $this->assets_url . 'js/admin.js',
+      array('jquery'),
+      $this->version
+    );
+    wp_enqueue_script($name);
+  }
+
+  public function localize() {
+    load_plugin_textdomain(
+      $this->shortname,
+      false,
+      dirname(plugin_basename($this->file)) . '/lang/'
+    );
+  }
+
+  public function setup_textdomain() {
+    $domain = 'mailpoet';
+    $locale = apply_filters(
+      'plugin_locale',
+      get_locale(),
+      $domain
+    );
+
+    $language_path = WP_LANG_DIR
+      . '/'
+      . $domain
+      . '/'
+      . $domain
+      . '-'
+      . $locale
+      . '.mo';
+
+    load_textdomain($domain, $language_path);
+    load_plugin_textdomain(
+      $domain,
+      false,
+      dirname(plugin_basename($this->file)) . '/lang/'
+    );
+  }
+
+  public function install() {
+    $this->log_version_number();
+  }
+
+  private function log_version_number() {
+    update_option(
+      $this->shortname . '_version', $this->version
+    );
+  }
+}

mailpoet.php

@@ -0,0 +1,31 @@
+<?php
+if (!defined('ABSPATH')) exit;
+
+/*
+ * Plugin Name: MailPoet
+ * Version: 1.0
+ * Plugin URI: http://www.mailpoet.com
+ * Description: MailPoet Newsletters.
+ * Author: MailPoet
+ * Author URI: http://www.mailpoet.com
+ * Requires at least: 4.0
+ * Tested up to: 4.0
+ *
+ * Text Domain: mailpoet
+ * Domain Path: /lang/
+ *
+ * @package WordPress
+ * @author MailPoet
+ * @since 1.0.0
+ */
+
+require_once('lib/mailpoet.php');
+
+function mailpoet() {
+  return new MailPoet(array(
+    'file' => __FILE__,
+    'version' => '1.0.0'
+  ));
+}
+
+mailpoet();

readme.txt

@@ -0,0 +1,41 @@
+=== MailPoet ===
+Contributors: mailpoet
+Donate link: http://mailpoet.com
+Tags: wordpress, plugin
+Requires at least: 4.0
+Tested up to: 4.0
+Stable tag: 1.0
+License: GPLv2 or later
+License URI: http://www.gnu.org/licenses/gpl-2.0.html
+
+MailPoet newsletters.
+
+== Description ==
+
+Long description.
+
+== Installation ==
+
+Installation instructions.
+
+== Screenshots ==
+
+Screenshots.
+
+== Frequently Asked Questions ==
+
+= Question? =
+
+Answer.
+
+== Changelog ==
+
+= 1.0 =
+* 2020-01-01
+* Initial release
+
+== Upgrade Notice ==
+
+= 1.0 =
+* 2020-01-01
+* Initial release

uninstall.php

@@ -0,0 +1,4 @@
+<?php
+if (!defined('WP_UNINSTALL_PLUGIN')) exit;
+
+// Runs on uninstallation, not on deactivation.