Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/app/view/admin/add-ons.php

@@ -0,0 +1,97 @@
+<?php
+
+/**
+ * The Calendar Add-ons page.
+ *
+ * @author     Time.ly Network Inc.
+ * @since      2.1
+ *
+ * @package    AI1EC
+ * @subpackage AI1EC.View
+ */
+class Ai1ec_View_Add_Ons extends Ai1ec_View_Admin_Abstract {
+    /**
+     * Adds page to the menu.
+     *
+     * @wp_hook admin_menu
+     *
+     * @return void
+     */
+    public function add_page() {
+        // =======================
+        // = Calendar Add Ons Page =
+        // =======================
+        add_submenu_page(
+            AI1EC_ADMIN_BASE_URL,
+            Ai1ec_I18n::__( 'Add-ons' ),
+            Ai1ec_I18n::__( 'Add-ons' ),
+            'manage_ai1ec_feeds',
+            AI1EC_PLUGIN_NAME . '-add-ons',
+            array( $this, 'display_page' )
+        );
+    }
+    /**
+     * Display Add Ons list page.
+     *
+     * @return void
+     */
+    public function display_page() {
+        wp_enqueue_style(
+            'ai1ec_addons.css',
+            AI1EC_ADMIN_THEME_CSS_URL . 'addons.css',
+            array(),
+            AI1EC_VERSION
+        );
+        $content  = get_site_transient( 'ai1ec_timely_addons' );
+        $is_error = false;
+        if (
+            false === $content ||
+            (
+                defined( 'AI1EC_DEBUG' ) &&
+                AI1EC_DEBUG
+            )
+        ) {
+            $is_error = true;
+            $feed     = wp_remote_get( AI1EC_TIMELY_ADDONS_URI );
+            if ( ! is_wp_error( $feed ) ) {
+                $content  = json_decode( wp_remote_retrieve_body( $feed ) );
+                if ( null !== $content ) {
+                    set_site_transient( 'ai1ec_timely_addons', $content, 3600 );
+                    $is_error = false;
+                }
+            }
+        }
+        $this->_registry->get( 'theme.loader' )->get_file(
+            'add-ons-list/page.twig',
+            array(
+                'labels'   => array(
+                    'title'             => Ai1ec_I18n::__(
+                        'Add-ons for All In One Event Calendar'
+                    ),
+                    'button_title'      => Ai1ec_I18n::__(
+                        'Browse All Add-ons'
+                    ),
+                    'paragraph_content' => Ai1ec_I18n::__(
+                        'These add-ons extend the functionality of the All-in-One Event Calendar.'
+                    ),
+                    'error'             => Ai1ec_I18n::__(
+                        'There was an error retrieving the extensions list from the server. Please try again later.'
+                    ),
+                ),
+                'content'  => $content,
+                'is_error' => $is_error,
+            ),
+            true
+        )->render();
+    }
+
+    public function add_meta_box() {
+    }
+
+    public function display_meta_box( $object, $box ) {
+    }
+
+    public function handle_post() {
+    }
+
+}