<?php
/**
 * Class to build & manage a contact form
 *
 * @package AlienContact
 * @todo Add documentation
 * @todo Add interface to database
 *
 * to use: insert <!--contactForm--> in a page or entry
 */

class AlienContact extends Plugin 
{
	private $theme= null;

	/**
	 * Add update beacon support
	 **/
	public function action_update_check()
	{
	 	Update::add( 'AlienContact', 'a22354d0-3ba5-11dd-ae16-0800200c9a66', $this->info->version );
	}

	function elements() 
	{
		return array(
			'name' => array(
				'id' => 'name',
				'type' => 'text',
				'label' => 'Name',
				'regex' => '/^.{2,}$/',
				'required' => TRUE
			),
			'email' => array(
				'id' => 'email',
				'type' => 'text',
				'label' => 'Email',
				'regex' => "/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/",
				'required' => TRUE
			),
			'url' => array(
				'id' => 'url',
				'type' => 'text',
				'label' => 'Website',
				'regex' => '/([http]?|[https]?)([:\/\/]?)(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/',
				'required' => FALSE
			),
			'message' => array(
				'id' => 'message',
				'type' => 'textarea',
				'label' => 'Message',
				'regex' => '/^[\s\S]{2,}$/',
				'required' => TRUE
			),
			'submit' => array(
				'id' => 'submit',
				'type' => 'submit',
				'label' => 'Send',
				'regex' => '',
				'required' => FALSE
			)
		);
	}
	
	public function filter_rewrite_rules( $rules ) 
	{
		$rules[]= new RewriteRule( array(
			'name' => 'aliencontact',
			'parse_regex' => '%scripts/aliencontact.js$%i',
			'build_str' =>  'scripts/aliencontact.js',
			'handler' => 'UserThemeHandler',
			'action' => 'display_js',
			'priority' => 6,
			'is_active' => 1,
		) );
		
		return $rules;
	}

	public function filter_post_content_out( $content ) 
	{
		$url= Site::get_url( 'host' ) . Controller::get_full_url();
		$input= 'post';

		$form= self::get_form( $url, $input );

		$content= str_replace( '<!--contactForm-->', $form, $content );

		return $content;
	}

	public function action_handler_display_js( $handler_vars ) 
	{
		$url= URL::get( 'ajax', array( 'context'=>'submit_form' ) );
		
		include( 'aliencontact.js.php' );
		
		exit;
	}

	public function action_ajax_submit_form( $handler ) 
	{
		echo self::get_form( '', 'post' );
	}
	
	public function filter_plugin_config( $actions, $plugin_id ) 
	{
		if ( $plugin_id == $this->plugin_id() ) {
			$actions[]= _t('Configure');
		}
		return $actions;
	}

	public function action_plugin_ui( $plugin_id, $action ) 
	{
		if ( $plugin_id == $this->plugin_id() ) {
			switch ( $action ) {
				case _t('Configure') :
					$ui= new FormUI( strtolower( get_class( $this ) ) );
					$email= $ui->append( 'text', 'email', 'aliencontact__email', _t('Email:') );
					$subject= $ui->append( 'text', 'subject', 'aliencontact__subject', _t('Email Subject:') );
					$database= $ui->append( 'checkbox', 'database', 'aliencontact__database', _t('Use Database') );
					$ui->append( 'submit', 'save', _t('Save') );
					$ui->out();
				break;
			}
		}
	}

	public function action_init_theme() {
		Stack::add( 'template_header_javascript', Site::get_url( 'scripts' ) . '/jquery.js', 'jquery' );
		Stack::add( 'template_header_javascript', Site::get_url( 'scripts' ) . '/aliencontact.js', 'aliencontact' );
		Stack::add( 'template_stylesheet', array( URL::get_from_filesystem(__FILE__) . '/aliencontact.css', 'screen' ), 'aliencontactcss' );
	}

	/**
	 * Prints the form
	 *
	 */
	function form()
	{
		$url= Site::get_url( 'host' ) . Controller::get_full_url();
		$input= 'post';
		
		echo self::get_form( $url, $input );
	}

	/**
	 * Fetch the form
	 *
 	 * @param string $action where the form should be sent to (usually current URL)
	 * @param string $input where input is coming from (only 'post' works now)
	 * @return string the form
	 */
	public function get_form( $action = '', $input = 'post' )
	{
		
		$elements = self::elements();
		
		$output= '';
		$values= array();
		$errors= array();
				
		if( $input == 'post' ) {
			foreach( $elements as $key => $field ) {
				if( isset( $_POST[ 'contactForm_' . $key ] ) || isset( $_POST[$key] ) ) {
					if( isset( $_POST['contactForm_' . $key] ) ) {
						$value = $_POST['contactForm_' . $key];
					}
					else {
						$value = $_POST[$key];
					}
					
					if( AlienContact::check_input( $value, $key ) != '' ) {
						$errors[$key]= AlienContact::check_input( $value, $key );
						$values[$key]= $value;
					} else {
						$values[$key]= $value;
					}
				}
			}
		} else {
			foreach( $elements as $key => $field ) {
				if( isset( $input[ $key ] ) ) {
					$value = $input[$key];
					if( AlienContact::check_input( $value, $key ) != '') {
						$errors[$key]= AlienContact::check_input($value, $key);
						$values[$key]= $value;
					} else {
						$values[$key]= $value;
					}
				}
			}
		}
		
		if( count( $errors ) != 0 ) {
			$output .= '<div class="errors">';
			$output .= '<h3>Errors</h3>';
			$output .= '<ol>';
			foreach( $errors as $id => $error ) {
				$output .= '<li id="contactForm_'.$id.'_error"><a href="#contactForm_'.$id.'_div" title="Fix the error">'.$error.'</a>.</li>';
			}
			$output .= '</ol>';
			$output .= '</div>';
			$output .= self::make_form( $action, $values, $errors );
		} elseif( count( $values ) > 0 ) {
			if( self::submit( $values ) ) {
				$output .= '<div class="success">';
				$output .= '<h3>Success</h3>';
				$output .= '<p>Your message has successfully been delivered.</p>';
				$output .= '</div>';
			} else {
				$output .= '<div class="errors">';
				$output .= '<h3>Error</h3>';
				$output .= '<p>Uh-oh... looks like I made a mistake. What can you expect? I am only a web server after all. Sorry... 1,000 times sorry. Please, give me another chance! I&apos;m begging you! Will you ever talk to me again?';
				$output .= '</div>';
				$output .= self::make_form( $action, $values, $errors );
			}
		} else {
			$output .= self::make_form( $action, $values, $errors );
		}

		return $output;
	}

	public function check_input( $value, $key ) 
	{
		$elements = self::elements();
		
		$value = trim( $value );
		
		if( ($elements[$key]['required'] and preg_match($elements[$key]['regex'], $value)) or (($elements[$key]['required'] == FALSE) && (strlen($value) != 0) && ($elements[$key]['regex'] != '') && (preg_match($elements[$key]['regex'], $value))) or (($elements[$key]['required'] == FALSE) && ($elements[$key]['regex'] == '')) ) {
			$error = '';
		} elseif(($elements[$key]['required'] == FALSE) and (strlen($value) == 0)) {
			$error = '';
		} elseif(($elements[$key]['required'] == TRUE) and (strlen($value) == 0)) {
			$error = 'You must enter a ' .  $elements[$key]['id'];
		} else {
			$error = 'Your ' . $elements[$key]['id'] . ' failed to validate.';
		}
		
		return $error;
	}

	function install() 
	{
		if( Options::get( 'aliencontact__database' ) ) {
			DB::register_table( 'aliencontact' );

			$sql = "CREATE TABLE " . DB::table('aliencontact') . " (
				id int(9) NOT NULL AUTO_INCREMENT,
				time int(12) NOT NULL,
				updated int(12) NOT NULL,
				ip varchar(20) NOT NULL,
				val blob  NOT NULL,
				UNIQUE KEY id (id)
			);";

			$sql = DB::dbdelta( $sql );
			
			return TRUE;
		} else {
			return FALSE;
		}

	}

	function insert( $input )
	{
		$insert= array();
		$insert['time']= time();
		$insert['updated']= time();
		$insert['ip']= $_SERVER['REMOTE_ADDR'];
		$insert['val']= serialize($input);
		
		return DB::insert( DB::table( 'aliencontact' ), $insert );
		
	}

	function submit( $input )
	{
		
		$elements= self::elements();
		
		$headers['MIME-Version']=  '1.0';
		$headers['Content-type']= 'text/html; charset=iso-8859-1';
		
		$message= 'You have recieved a submission through your online form. The message follows.<br />';
		
		foreach($input as $field => $value) {
			$message.= $elements[$field]['label'] . ': ';
			$message.= $value;
			$message.= '<br />';
		}
					
		if( Utils::mail( Options::get( 'aliencontact__email' ), Options::get( 'aliencontact__subject' ), $message, $headers ) == TRUE ) {
			if( self::install() ) {
				if( self::insert( $input ) ) {
					return TRUE;
				} else {
					return FALSE;
				}
			} else {
				return TRUE;
			}
		} else {
			return FALSE;
		}
	}

	function make_form( $action = '', $input = NULL, $errors = NULL )
	{		
		$elements= self::elements();

		if( $errors == NULL ) {
			unset( $errors );
		}

		$output= '<form id="contactForm" name="contactForm" action="' . $action . '" method="post" class=""';
		$output.= '>';
		
		foreach( $elements as $key => $element ) {
				$output .= '<div id="contactForm_'.$key.'_div" class="container field '.$element['type'] . ' ' . $key;
				$output .= ($element['required']) ? ' required' : '';
				if(isset($errors) && isset($errors[$key]) && $errors[$key] != '') {
					$output .= ' bad';
				} elseif(isset($errors)) {
					$output .= ' good';
				}
				$output .= '">';
				
				switch($element['type']) {
					case 'text':
						$output .= '<label id="contactForm_'.$key.'_label" for="contactForm_'.$key.'" class="contactForm label">'.$element['label'].'</label>';
						$output .= '<input id="contactForm_'.$key.'" name="contactForm_'.$key.'" type="text" class="contactForm '.$element['type'].' '.$element['id'].'" value="';
						if(isset($input[$key])) {
							$output .= $input[$key];
						}
						$output .= '" />';
						if(isset($element['info'])) {
							$output .= '<p id="contactForm_'.$key.'_info" class="contactForm_info">' . $element['info'] . '</p>'; 
						}
					break;
					case 'textarea':
						$output .= '<label id="contactForm_'.$key.'_label" for="contactForm_'.$key.'" class="contactForm label">'.$element['label'].'</label>';
						$output .= '<textarea id="contactForm_'.$key.'" name="contactForm_'.$key.'" class="contactForm '.$element['type'].' '.$element['id'].'" rows="3" cols="30">';
						if(isset($input[$key])) {
							$output .= $input[$key];
						}
						$output .= '</textarea>';
						if(isset($element['info'])) {
							$output .= '<p id="contactForm_'.$key.'_info" class="contactForm_info">' . $element['info'] . '</p>'; 
						}
					break;
					case 'submit':
						$output .= '<input type="submit" name="contactForm_'.$key.'" id="contactForm_'.$key.'" value="'.$element['label'].'" />';
					break;
				}
				
				if(isset($errors[$key]) && $errors[$key] != '') {
					$output .= '<a href="#contactForm_'.$key.'_error" title="' . $errors[$key] . '" class="error" class="error">Error</a>';
				}
				
				$output.= "</div>\n";
		}
		
		$output.= "</form>";
		
		return $output;
	}
}
?>