Zend FR

<?php

/**
 * Class de validation de phrase
 * 
 * @author     : Jean luc BARAT (*******@***********)
 * @date    : 13/09/2011
 * @license : GNU
 * 
 */
    require_once 'Zend/Validate/Abstract.php';
    class Nk_Form_Validate_Sentence extends Zend_Validate_Abstract 
    {
        const MSG_NOENOUGTHWORD     = 'noenought';
        const MSG_TOOLONGWORD        = 'toolongword';
        const MSG_SEEMNOSENTENCE    = 'seemnosentence';
        
        protected $_messageTemplates = array(
            self::MSG_TOOLONGWORD         => "Il y a des mots trop longs",
            self::MSG_NOENOUGTHWORD        => "La phrase ne contient pas assez de mots",
            self::MSG_SEEMNOSENTENCE    => "La phrase semble incorrecte, rédigez une vraie phrase"
        );
        
        /*
         * @param int the minimum words must contains the sentence
         */
        private $_minWords;
        
        /**
         * Sets validator options
         *
         * @param  string $minWords the minimum of words
         * @return void
         */
        public function __construct($minWords) 
        {
            $this->_minWords = $minWords;
        }
        
           /**
         * Validate of sentence based on percent of short words
         * @see Zend_Validate_Interface::isValid()
         *
         * @param mixed $value
         * @return boolean
         */
        public function isValid ($value)
        {    
            $this->_setValue($value);
            $shortWord = 0;
            
            // sépare tout ce qui contient ni des mots ni underscore
            $exp         = "/[\W_]/"; 
            $champ         = utf8_decode($value);
            $words         = preg_split($exp, $champ , -1,  PREG_SPLIT_NO_EMPTY);
            $nbWords     = count($words);
                        
            if( $nbWords <= $this->_minWords ) {
                $this->_error(self::MSG_NOENOUGTHWORD);
                return false;
            }
            
            foreach($words as $word) {
                if(strlen($word) > 15 && strlen($word)) {
                    $this->_error(self::MSG_TOOLONGWORD);
                    return false;
                }
                if(strlen($word) <= 3) {
                    $shortWord += 1;
                }
            }
            
            # calculate percent of short words
            if(100 * $shortWord / $nbWords > 70) {
                    $this->_error(self::MSG_SEEMNOSENTENCE);
                    return false;
            }            
            
            return true;
        }
    }