From 69ec05cd6a328ef6fcefcfa601fff7f8bcc20178 Mon Sep 17 00:00:00 2001
From: Michael Thomas <michaelhthomas@outlook.com>
Date: Mon, 14 Feb 2022 16:55:39 -0500
Subject: [PATCH] Bring back support for legacy shortcodes

---
 api.php           | 51 ++++++++++++++++++++++++++++++++++++++++++
 cognito-forms.php | 56 ++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 106 insertions(+), 1 deletion(-)
 create mode 100644 api.php

diff --git a/api.php b/api.php
new file mode 100644
index 0000000..f347647
--- /dev/null
+++ b/api.php
@@ -0,0 +1,51 @@
+<?php
+/**
+ * Cognito Forms WordPress Plugin.
+ *
+ * The Cognito Forms WordPress Plugin is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * The Cognito Forms WordPress Plugin is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+// Cognito API access
+if ( !class_exists('CognitoAPI') ) {
+	class CognitoAPI {
+		public static $formsBase = 'https://www.cognitoforms.com/';
+
+		// Convert MS GUID to Short GUID
+		private static function guid_to_short_guid($guid) {
+			$guid_byte_order = [ 3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15 ];
+			$guid = preg_replace( "/[^a-zA-Z0-9]+/", "", $guid );
+			$hex = "";
+			for ( $i = 0; $i < 16; $i++ )
+				$hex .= substr( $guid, 2 * $guid_byte_order[$i], 2 );
+			$bin = hex2bin( $hex );
+			$encoded = base64_encode( $bin );
+			$encoded = str_replace( "/", "_", $encoded );
+			$encoded = str_replace( "+", "-", $encoded );
+			$encoded = substr ( $encoded, 0, 22 );
+			return $encoded;
+		}
+
+		// Builds form embed script
+		public static function get_form_embed_script( $public_key, $formId ) {
+			$base = self::$formsBase;
+			$public_short_guid = self::guid_to_short_guid( $public_key );
+
+			return <<< EOF
+				<script src="{$base}/f/seamless.js" data-key="{$public_short_guid}" data-form="{$formId}"></script>
+	EOF;
+		}
+	}
+}
+
+?>
diff --git a/cognito-forms.php b/cognito-forms.php
index 03befd1..908fecf 100644
--- a/cognito-forms.php
+++ b/cognito-forms.php
@@ -37,6 +37,8 @@ if ( ! defined( 'ABSPATH' ) ) {
  */
 
 if ( !class_exists('CognitoFormsPlugin') ) {
+	require_once dirname(__FILE__) . '/api.php';
+
 	class CognitoFormsPlugin {
 		// Initialization actions
 		private static $actions = array(
@@ -45,6 +47,12 @@ if ( !class_exists('CognitoFormsPlugin') ) {
 			'init'
 		);
 
+		// Supported shortcodes
+		private static $shortcodes = array(
+			'CognitoForms' => 'render_shortcode',
+			'cognitoforms' => 'render_shortcode'
+		);
+
 		// Registers plug-in actions
 		private function addActions($actions) {
 			foreach($actions as $action)
@@ -57,9 +65,31 @@ if ( !class_exists('CognitoFormsPlugin') ) {
 				add_filter($filter, array($this, $filter));
 		}
 
+		// Registers shortcodes
+		private function addShortcodes($shortcodes) {
+			foreach($shortcodes as $tag => $func)
+				add_shortcode($tag, array($this, $func));
+		}
+
+		// Checks if an option exists in the database
+		private function option_exists( $option_name, $site_wide = false ) {
+			global $wpdb;
+			return $wpdb->query( $wpdb->prepare( "SELECT * FROM ". ($site_wide ? $wpdb->base_prefix : $wpdb->prefix). "options WHERE option_name ='%s' LIMIT 1", $option_name ) );
+		}
+
+		// Removes a list of options if they exist
+		private function remove_options( $options ) {
+			foreach ($options as $option) {
+				if ( $this->option_exists( $option ) ) {
+					delete_option( $option );
+				}
+			}
+		}
+
 		// Entrypoint
 		public function __construct() {
 			$this->addActions(self::$actions);
+			$this->addShortcodes(self::$shortcodes);
 		}
 
 		public function init() {
@@ -71,7 +101,22 @@ if ( !class_exists('CognitoFormsPlugin') ) {
 
 		// Initialize plug-in
 		public function admin_init() {
-			if(!current_user_can('edit_posts') && !current_user_can('edit_pages')) return;
+			if( !current_user_can( 'edit_posts' ) && !current_user_can( 'edit_pages' ) )
+				return;
+
+			register_setting('cognito_plugin', 'cognito_public_key');
+
+			// Remove old API keys from the database
+			$this->remove_options( array(
+				'cognito_api_key',
+				'cognito_admin_key',
+				'cognito_organization'
+			) );
+
+			// If the flag to delete options was passed in, delete them
+			if ( isset( $_GET['cog_clear'] ) && $_GET['cog_clear'] == '1' ) {
+				delete_option('cognito_public_key');
+			}
 
 			// Initialize TinyMCE Plugin
 			$this->tinymce_init();
@@ -147,6 +192,15 @@ if ( !class_exists('CognitoFormsPlugin') ) {
 			add_submenu_page( 'Cognito', 'Templates', 'Templates', 'manage_options', 'CognitoTemplates', array( $this, 'main_page' ) );
 		}
 
+		// Called when a 'CognitoForms' shortcode is encountered, renders form embed script
+		public function render_shortcode($atts, $content = null, $code = '') {
+			// Default to key setting, unless overridden in shortcode (allows for modules from multiple orgs)
+			$key = empty($atts['key']) ? get_option('cognito_public_key') : $atts['key'];
+			if (empty($atts['id']) || empty($key)) return '';
+
+			return CognitoAPI::get_form_embed_script($key, $atts['id']);
+		}
+
 		// Entrypoint for Cognito Forms access
 		public function main_page() {
 			include 'templates/main.php';