Index: trunk/in-portal.php
===================================================================
diff -u -N
--- trunk/in-portal.php	(revision 0)
+++ trunk/in-portal.php	(revision 16336)
@@ -0,0 +1,308 @@
+<?php
+/**
+ * Plugin Name: In-Portal CMS
+ * Plugin URI: http://www.in-portal.com
+ * Description: This plugin allow to use <a href="http://www.in-portal.com">In-Portal CMS</a> website templates as building blocks inside WordPress theme.
+ * Version: 1.0.0
+ * Author: Intechnic
+ * Author URI: http://www.intechnic.com
+ * License: GNU/GPL
+ */
+defined('ABSPATH') or die('Plugin file cannot be accessed directly.');
+
+class InPortal
+{
+
+	protected $optionDefaults = array(
+		'inportal_website_url' => '',
+		'inportal_cache_duration' => '60',
+	);
+
+	/**
+	 * Performs plugin initialization.
+	 */
+	public function __construct()
+	{
+		if ( is_admin() ) {
+			add_action('admin_menu', array($this, 'hookAdminMenu'));
+			add_action('admin_init', array($this, 'hookAdminInit'));
+		}
+	}
+
+	/**
+	 * Additional actions upon plugin activation (installation/upgrade).
+	 *
+	 * @return void
+	 */
+	public function hookActivation()
+	{
+		global $wpdb;
+
+		foreach ( $this->optionDefaults as $option => $default ) {
+			add_option($option, $default);
+		}
+
+		$sql = 'CREATE TABLE ' . $this->getTableName() . ' (
+				  Id int(11) NOT NULL AUTO_INCREMENT,
+				  TemplateName varchar(255) NOT NULL DEFAULT "",
+				  TemplateContent text,
+				  ExpiresOn int(11) DEFAULT NULL,
+				  PRIMARY KEY (Id),
+				  UNIQUE KEY TemplateName (TemplateName(50))
+				) ' . $wpdb->get_charset_collate();
+
+		require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
+		dbDelta($sql);
+	}
+
+	/**
+	 * Returns database table used for template content caching.
+	 *
+	 * @return string
+	 */
+	protected function getTableName()
+	{
+		global $wpdb;
+
+		return $wpdb->prefix . 'inp_template_cache';
+	}
+
+	/**
+	 * Additional actions upon plugin deactivation.
+	 *
+	 * @return void
+	 */
+	public function hookDeactivation()
+	{
+
+	}
+
+	/**
+	 * Additional actions upon plugin removal.
+	 *
+	 * @return void
+	 */
+	public function hookUninstall()
+	{
+		foreach ( array_keys($this->optionDefaults) as $option ) {
+			delete_option($option);
+		}
+	}
+
+	/**
+	 * Adds plugin configuration page.
+	 *
+	 * @return void
+	 */
+	public function hookAdminMenu() {
+		add_options_page(
+			__('In-Portal CMS Settings', 'in-portal'),
+			__('In-Portal CMS', 'in-portal'),
+			'administrator',
+			'in-portal-settings',
+			array($this, 'hookMenuPage')
+		);
+	}
+
+	/**
+	 * Displays contents of plugin configuration page.
+	 *
+	 * @return void
+	 */
+	public function hookMenuPage()
+	{
+		?>
+			<div class="wrap">
+				<h2><?php _e('In-Portal CMS Settings', 'in-portal'); ?></h2>
+
+				<form method="post" action="options.php">
+					<?php
+						settings_fields('in-portal-settings-group');
+						do_settings_sections('in-portal-settings-group');
+					?>
+
+					<table class="form-table">
+						<tr valign="top">
+							<th scope="row"><?php _e('In-Portal CMS Address (URL)', 'in-portal'); ?></th>
+							<td>
+								<input type="text" name="inportal_website_url" aria-describedby="inportal-website-url-description" value="<?php form_option('inportal_website_url'); ?>" class="regular-text ltr" />
+								<p class="description" id="inportal-website-url-description">
+									<?php _e('Enter the address of In-Portal CMS website here.', 'in-portal'); ?>
+								</p>
+							</td>
+						</tr>
+						<tr valign="top">
+							<th scope="row"><?php _e('Cache Duration', 'in-portal'); ?></th>
+							<td>
+								<input type="number" name="inportal_cache_duration" aria-describedby="inportal-cache-duration-description"  value="<?php form_option('inportal_cache_duration'); ?>" class="small-text"/> <?php _e('minutes', 'in-portal'); ?>
+								<p class="description" id="inportal-cache-duration-description">
+									<?php _e('How long it takes for template, retrieved from In-Portal CMS website to be considered out of date.', 'in-portal'); ?>
+								</p>
+							</td>
+						</tr>
+					</table>
+
+					<?php submit_button(); ?>
+				</form>
+			</div>
+		<?php
+	}
+
+	/**
+	 * Prepares plugin options to be used on plugin configuration page.
+	 *
+	 * @return void
+	 */
+	public function hookAdminInit()
+	{
+		foreach ( array_keys($this->optionDefaults) as $option ) {
+			register_setting('in-portal-settings-group', $option);
+			add_filter('sanitize_option_' . $option, array($this, 'hookSanitizeOption'), 10, 2);
+		}
+	}
+
+	/**
+	 * Performs option value sanitization.
+	 *
+	 * @param mixed  $value  Option value.
+	 * @param string $option Option name.
+	 *
+	 * @return mixed
+	 */
+	public function hookSanitizeOption($value, $option)
+	{
+		$error = '';
+
+		switch ( $option ) {
+			case 'inportal_website_url':
+				if ( !strlen($value) ) {
+					$error = __('The In-Portal CMS Address is required.');
+				}
+				elseif ( filter_var($value, FILTER_VALIDATE_URL) === false ) {
+					$error = __('The In-Portal CMS Address you entered did not appear to be a valid URL. Please enter a valid URL.');
+				}
+				else {
+					$value = rtrim(preg_replace('/index.php$/', '', $value), '/') . '/';
+				}
+				break;
+
+			case 'inportal_cache_duration':
+				if ( !strlen($value) ) {
+					$error = __('The Cache Duration is required.');
+				}
+				elseif ( !preg_match('/^[\d]+$/', $value) ) {
+					$error = __('The Cache Duration must be a positive number. Enter "0" do disable caching.');
+				}
+				break;
+		}
+
+		if ( $error ) {
+			add_settings_error($option, 'invalid_' . $option, $error);
+
+			// Don't save invalid value.
+			return get_option($option, $this->optionDefaults[$option]);
+		}
+
+		return $value;
+	}
+
+	/**
+	 * Theme tag: returns contents of In-Portal CMS template.
+	 *
+	 * @param string      $name           Template name.
+	 * @param array       $params         Template parameters.
+	 * @param string|null $cache_duration Cache duration.
+	 *
+	 * @return string|WP_Error
+	 */
+	public function getTemplate($name, array $params = array(), $cache_duration = null)
+	{
+		global $wpdb;
+
+		$table_name = $this->getTableName();
+
+		$sql = 'SELECT *
+				FROM ' . $table_name . '
+				WHERE TemplateName = %s';
+		$cached_data = $wpdb->get_row($wpdb->prepare($sql, $name));
+
+		$now = time();
+
+		if ( is_object($cached_data) && $cached_data->ExpiresOn > $now ) {
+			return $this->applyTemplateParams($cached_data->TemplateContent);
+		}
+
+		$base_url = get_option('inportal_website_url');
+
+		if ( !$base_url ) {
+			return new WP_Error('missing_url', __('The In-Portal CMS Address is not specified.'));
+		}
+
+		$params['t'] = $name; // The name of In-Portal CMS template.
+		$params['is_wordpress'] = 1; // Marker to allow returning WordPress-specific HTML.
+
+		$response = wp_remote_get($base_url . '?' . http_build_query($params));
+
+		if ( $response['response']['code'] !== 200 ) {
+			return new WP_Error('missing_template', __('The In-Portal CMS template "' . $name . '" not found.'));
+		}
+
+		$content = wp_remote_retrieve_body($response);
+
+		if ( !isset($cache_duration) ) {
+			$cache_duration = get_option('inportal_cache_duration');
+		}
+
+		$wpdb->replace(
+			$table_name,
+			array(
+				'TemplateName' => $name,
+				'TemplateContent' => $content,
+				'ExpiresOn' => strtotime('+' . $cache_duration . ' minutes'),
+			)
+		);
+
+		return $this->applyTemplateParams($content);
+	}
+
+	/**
+	 * Replaces template parameters in HTML comments within template HTML.
+	 *
+	 * @param string $template_content Template content.
+	 * @param array  $params           Template params.
+	 *
+	 * @return string
+	 */
+	protected function applyTemplateParams($template_content, array $params = array())
+	{
+		foreach ( $params as $key => $value ) {
+			$template_content = str_replace('<!--#' . $key . '#-->', $value, $template_content);
+		}
+
+		return $template_content;
+	}
+}
+
+
+/**
+ * Theme tag: returns contents of In-Portal CMS template.
+ *
+ * @param string      $name           Template name.
+ * @param array       $params         Template parameters.
+ * @param string|null $cache_duration Cache duration.
+ *
+ * @return string|WP_Error
+ */
+function inportal_get_template($name, $params = array(), $cache_duration = null)
+{
+	global $in_portal;
+
+	return $in_portal->getTemplate($name, $params, $cache_duration);
+}
+
+$in_portal = new InPortal();
+
+// These type of hooks needs to be registered in main file (not in class constructor).
+register_activation_hook(__FILE__, array($in_portal, 'hookActivation'));
+register_deactivation_hook(__FILE__, array($in_portal, 'hookDeactivation'));
+register_uninstall_hook(__FILE__, array($in_portal, 'hookUninstall'));