Person.php

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<?php
class Dataface_Ontology_Person extends Dataface_Ontology {
        function buildAttributes(){
                $this->fieldnames = array();
                $this->attributes = array();
                
                $email = null;
                // First let's find the email field.
                
                // First we'll check to see if any fields have been explicitly 
                // flagged as email address fields.
                foreach ( $this->table->fields(false,true) as $field ){
                        if ( @$field['email'] ){
                                $email = $field['name'];
                                break;
                        }
                }
                if ( !isset($email) ){
                        // Next lets see if any of the fields actually contain the word
                        // email in the name
                        $candidates = preg_grep('/(email)/i', array_keys($this->table->fields()));
                        foreach ( $candidates as $candidate ){
                                if ( $this->table->isChar($candidate) ){
                                        $email = $candidate;
                                        break;
                                }
                        }
                }
                
                if ( isset($email) ){
                        $field =& $this->table->getField($email);
                        $this->attributes['email'] =& $field;
                        unset($field);
                        $this->fieldnames['email'] = $email;
                }
                
                return true;
                
        }
        
        function validate_email($value, $allowBlanks=true){
                if ( !$allowBlanks and !trim($value) ) return false;
                
                return preg_match('/^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i', $value);
        }
        
}