/plugins/gravityforms/forms_model.php

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<?php

require_once(ABSPATH . "/wp-includes/post.php");

define("GFORMS_MAX_FIELD_LENGTH", 200);

class GFFormsModel {

    public static $uploaded_files = array();
    public static $unique_ids = array();

    private static $_confirmations = array();
    private static $_current_forms = array();
    private static $_current_lead = null;

    public static function flush_current_forms(){
        self::$_current_forms = null;
    }

    public static function flush_current_lead(){
        self::$_current_lead = null;
    }

    public static function flush_confirmations(){
        self::$_confirmations = null;
    }

    public static function get_form_table_name(){
        global $wpdb;
        return $wpdb->prefix . "rg_form";
    }

    public static function get_meta_table_name(){
        global $wpdb;
        return $wpdb->prefix . "rg_form_meta";
    }

    public static function get_form_view_table_name(){
        global $wpdb;
        return $wpdb->prefix . "rg_form_view";
    }

    public static function get_lead_table_name(){
        global $wpdb;
        return $wpdb->prefix . "rg_lead";
    }

    public static function get_lead_meta_table_name(){
        global $wpdb;
        return $wpdb->prefix . "rg_lead_meta";
    }

    public static function get_lead_notes_table_name(){
        global $wpdb;
        return $wpdb->prefix . "rg_lead_notes";
    }

    public static function get_lead_details_table_name(){
        global $wpdb;
        return $wpdb->prefix . "rg_lead_detail";
    }

    public static function get_lead_details_long_table_name(){
        global $wpdb;
        return $wpdb->prefix . "rg_lead_detail_long";
    }

    public static function get_lead_view_name(){
        global $wpdb;
        return $wpdb->prefix . "rg_lead_view";
    }

    public static function get_forms($is_active = null, $sort="title ASC"){
        global $wpdb;
        $form_table_name =  self::get_form_table_name();
        $lead_table_name = self::get_lead_table_name();
        $view_table_name = self::get_form_view_table_name();

        $active_clause = $is_active !== null ? $wpdb->prepare("WHERE is_active=%d", $is_active) : "";
        $order_by = !empty($sort) ? "ORDER BY $sort" : "";

        $sql = "SELECT f.id, f.title, f.date_created, f.is_active, 0 as lead_count, 0 view_count
                FROM $form_table_name f
                $active_clause
                $order_by";

        //Getting all forms
        $forms = $wpdb->get_results($sql);

        //Getting entry count per form
        $sql = "SELECT form_id, count(id) as lead_count FROM $lead_table_name l WHERE status='active' GROUP BY form_id";
        $entry_count = $wpdb->get_results($sql);

        //Getting view count per form
        $sql = "SELECT form_id, sum(count) as view_count FROM $view_table_name GROUP BY form_id";
        $view_count = $wpdb->get_results($sql);

        //Adding entry counts and to form array
        foreach($forms as &$form){
            foreach($view_count as $count){
                if($count->form_id == $form->id){
                    $form->view_count = $count->view_count;
                    break;
                }
            }

            foreach($entry_count as $count){
                if($count->form_id == $form->id){
                    $form->lead_count = $count->lead_count;
                    break;
                }
            }
        }

        return $forms;
    }

    public static function get_forms_by_id($ids){
        _deprecated_function('get_forms_by_id', '1.7', 'get_form_meta_by_id');
        return self::get_form_meta_by_id($ids);
    }

    public static function get_form_payment_totals($form_id){
        global $wpdb;
        $lead_table_name = self::get_lead_table_name();

        $sql = $wpdb->prepare(" SELECT sum(payment_amount) revenue, count(l.id) orders
                                 FROM $lead_table_name l
                                 WHERE form_id=%d AND payment_amount IS NOT null", $form_id);

        $totals = $wpdb->get_row($sql, ARRAY_A);

        $active = $wpdb->get_var($wpdb->prepare(" SELECT count(id) as active
                                                 FROM $lead_table_name
                                                 WHERE form_id=%d AND payment_status='Active'", $form_id));

        if(empty($active))
            $active = 0;

        $totals["active"] = $active;

        return $totals;
    }

    public static function get_form_counts($form_id){
        global $wpdb;
        $lead_table_name = self::get_lead_table_name();
        $sql = $wpdb->prepare(
                "SELECT
                    (SELECT count(0) FROM $lead_table_name WHERE form_id=%d AND status='active') as total,
                    (SELECT count(0) FROM $lead_table_name WHERE is_read=0 AND status='active' AND form_id=%d) as unread,
                    (SELECT count(0) FROM $lead_table_name WHERE is_starred=1 AND status='active' AND form_id=%d) as starred,
                    (SELECT count(0) FROM $lead_table_name WHERE status='spam' AND form_id=%d) as spam,
                    (SELECT count(0) FROM $lead_table_name WHERE status='trash' AND form_id=%d) as trash",
                    $form_id, $form_id, $form_id, $form_id, $form_id);

         $results = $wpdb->get_results($sql, ARRAY_A);

         return $results[0];

    }

    public static function get_form_summary(){
        global $wpdb;
        $form_table_name =  self::get_form_table_name();
        $lead_table_name = self::get_lead_table_name();

        $sql = "SELECT l.form_id, count(l.id) as unread_count
                FROM $lead_table_name l
                WHERE is_read=0 AND status='active'
                GROUP BY form_id";

        //getting number of unread and total leads for all forms
        $unread_results = $wpdb->get_results($sql, ARRAY_A);

        $sql = "SELECT l.form_id, max(l.date_created) as last_lead_date, count(l.id) as total_leads
                FROM $lead_table_name l
                WHERE status='active'
                GROUP BY form_id";

        $lead_date_results = $wpdb->get_results($sql, ARRAY_A);

        $sql = "SELECT id, title, '' as last_lead_date, 0 as unread_count
                FROM $form_table_name
                WHERE is_active=1
                ORDER BY title";

        $forms = $wpdb->get_results($sql, ARRAY_A);


        for($i=0; $count = sizeof($forms), $i<$count; $i++){
            if(is_array($unread_results)){
                foreach($unread_results as $unread_result){
                    if($unread_result["form_id"] == $forms[$i]["id"]){
                        $forms[$i]["unread_count"] = $unread_result["unread_count"];
                        break;
                    }
                }
            }

            if(is_array($lead_date_results)){
                foreach($lead_date_results as $lead_date_result){
                    if($lead_date_result["form_id"] == $forms[$i]["id"]){
                        $forms[$i]["last_lead_date"] = $lead_date_result["last_lead_date"];
                        $forms[$i]["total_leads"] = $lead_date_result["total_leads"];
                        break;
                    }
                }
            }

        }

        return $forms;
    }

    public static function get_form_count(){
        global $wpdb;
        $form_table_name =  self::get_form_table_name();
        $results = $wpdb->get_results("SELECT count(0) as count FROM $form_table_name UNION ALL SELECT count(0) as count FROM $form_table_name WHERE is_active=1 ");
        return array(   "total" => intval($results[0]->count),
                        "active" => intval($results[1]->count),
                        "inactive" => intval($results[0]->count) - intval($results[1]->count)
                        );
    }

    public static function get_form_id($form_title){
        $forms = self::get_forms();
        foreach($forms as $form){
            $sanitized_name = str_replace("[", "", str_replace("]","", $form->title));
            if($form->title == $form_title || $sanitized_name == $form_title)
                return $form->id;
        }
        return 0;
    }

    public static function get_form($form_id){
        global $wpdb;
        $table_name =  self::get_form_table_name();
        $results = $wpdb->get_results($wpdb->prepare("SELECT * FROM $table_name WHERE id=%d", $form_id));
        return $results[0];
    }

    public static function get_form_meta($form_id){
        global $wpdb;

        // return cached version if form meta has been previously retrieved for this form
        if(isset(self::$_current_forms[$form_id])){
            return self::$_current_forms[$form_id];
		}

        $table_name =  self::get_meta_table_name();
        $form_row = $wpdb->get_row($wpdb->prepare("SELECT display_meta, notifications FROM {$table_name} WHERE form_id=%d", $form_id), ARRAY_A);

        //loading main form object
        $form = maybe_unserialize($form_row["display_meta"]);
        if(!$form)
            return null;

        //loading notifications
        $form["notifications"] = maybe_unserialize($form_row["notifications"]);

        //copying some form variables down to fields for easier access
        $page_number = 1;
        $description_placement = rgar($form, "descriptionPlacement") == "above" ? "above" : "below";
        if(is_array(rgar($form,"fields"))){
            foreach($form["fields"] as &$field){
                $field["formId"] = $form["id"];
                $field["pageNumber"] = $page_number;
                $field["descriptionPlacement"] = $description_placement;
                if($field["type"] == "page"){
                    $page_number++;
                    $field["pageNumber"] = $page_number;
                }
            }
        }

        // loading confirmations from legacy structure into new structure
        $form = self::load_confirmations($form);

         //only migrate legacy notification if there isn't any notification configured in new structure
        if(!isset($form["notifications"])){
            $form = self::load_notifications_from_legacy($form); //moving notification data from legacy structure into new "notifications" array
        }

        //load notifications to legacy structure to maintain backward compatibility with legacy hooks and functions
        $form = self::load_notifications_to_legacy($form);

        // cached form meta for cheaper retrieval on subsequent requests
        self::$_current_forms[$form_id] = $form;

        return $form;
    }

    public static function get_form_meta_by_id($ids){
        global $wpdb;
        $form_table_name =  self::get_form_table_name();
        $meta_table_name =  self::get_meta_table_name();

        if(is_array($ids))
            $ids = implode(",", array_map('intval', $ids ) );
        else
            $ids = intval($ids);

        $results = $wpdb->get_results(" SELECT display_meta, confirmations, notifications FROM {$form_table_name} f
                                        INNER JOIN {$meta_table_name} m ON f.id = m.form_id
                                        WHERE id in({$ids})", ARRAY_A);

        foreach ($results as &$result) {
            $form = maybe_unserialize($result["display_meta"]);
            $form['confirmations'] = maybe_unserialize($result["confirmations"]);
            $form['notifications'] = maybe_unserialize($result["notifications"]);
            $result = $form;
        }

        return $results;

    }

    private static function load_notifications_to_legacy($form){
        if(!is_array(rgar($form, "notifications")))
            return;

        foreach($form["notifications"] as $notification){
            if(!in_array(rgar($notification,"type"), array("user", "admin")))
                continue;

            $legacy_notification = $notification;

            if($notification["toType"] == "field"){
                $legacy_notification["toField"] = $notification["to"];
                unset($legacy_notification["to"]);
            }

            //unsetting new properties
            unset($legacy_notification["toType"]);
            unset($legacy_notification["id"]);
            unset($legacy_notification["event"]);
            unset($legacy_notification["name"]);
            if(isset($legacy_notification["type"]))
                unset($legacy_notification["type"]);

            //saving into form object
            $property = $notification["type"] == "user" ? "autoResponder" : "notification";
            $form[$property] = $legacy_notification;
        }

        return $form;
    }

    private static function load_notifications_from_legacy($form){

        $form["notifications"] = array();
        if(GFCommon::has_admin_notification($form)){
            $admin_notification = $form["notification"];

            //if there is a fromField configured, move it to "from" as a merge tag
            $admin_notification = self::convert_property_to_merge_tag($form, $form["notification"], "from", "fromField");

            //if there is a fromNameField configured, move it to "fromName" as a merge tag
            $admin_notification = self::convert_property_to_merge_tag($form, $form["notification"], "fromName", "fromNameField");

            //if there is a replyToField configured, move it to "replyTo" as a merge tag
            $admin_notification = self::convert_property_to_merge_tag($form, $form["notification"], "replyTo", "replyToField");

            //if routing is configured, set toType to routing, otherwise, set it to email
            $admin_notification["toType"] = !rgempty("routing", $admin_notification) ? "routing" : "email";

            $notification_id = uniqid();

            //assigning this notification to the form_submission action
            $admin_notification["event"] = "form_submission";
            $admin_notification["name"] = __("Admin Notification", "gravityforms");
            $admin_notification["type"] = "admin";
            $admin_notification["id"] = $notification_id;

            //copying admin notification as an item in the new notifications array
            $form["notifications"][$notification_id] = $admin_notification;
        }

        if(GFCommon::has_user_notification($form)){

            $user_notification = $form["autoResponder"];

            //if there is a toField configured, set toType to field, if not, set it toemail
            $to_field = rgar($user_notification, "toField");
            if(!empty($to_field)){
                $user_notification["toType"] = "field";
                $user_notification["to"] = $to_field;
            }
            else{
                $user_notification["toType"] = "email";
            }

            $notification_id = uniqid();
            //assigning this notification to the form_submission action
            $user_notification["event"] = "form_submission";
            $user_notification["name"] = __("User Notification", "gravityforms");
            $user_notification["type"] = "user";
            $user_notification["id"] = $notification_id;

            //copying user notification as an item in the new notifications array
            $form["notifications"][$notification_id] = $user_notification;
        }

        self::save_form_notifications($form["id"], $form["notifications"]);

        return $form;
    }

    private static function convert_property_to_merge_tag($form, $array, $target_property, $source_property){
        $merge_tag = self::get_field_merge_tag($form, rgar($array, $source_property));
            if($merge_tag){
                $array[$target_property] = $merge_tag;
                unset($array[$source_property]);
            }

        return $array;
    }

    private static function get_field_merge_tag($form, $field_id){
        $field = self::get_field($form, $field_id);
        if(!$field)
            return false;

        return "{" . GFCommon::get_label($field, $field_id) . ":" . $field_id . "}";
    }

    public static function add_default_properties($form){
        if(is_array(rgar($form,"fields"))){
            $all_fields = array("adminLabel"=>"","adminOnly"=>"","allowsPrepopulate"=>"","defaultValue"=>"","description"=>"","content"=>"","cssClass"=>"",
                                "errorMessage"=>"","id"=>"","inputName"=>"","isRequired"=>"","label"=>"","noDuplicates"=>"",
                                "size"=>"","type"=>"","postCustomFieldName"=>"","displayAllCategories"=>"","displayCaption"=>"","displayDescription"=>"",
                                "displayTitle"=>"","inputType"=>"","rangeMin"=>"","rangeMax"=>"","calendarIconType"=>"",
                                "calendarIconUrl"=>"", "dateType"=>"","dateFormat"=>"","phoneFormat"=>"","addressType"=>"","defaultCountry"=>"","defaultProvince"=>"",
                                "defaultState"=>"","hideAddress2"=>"","hideCountry"=>"","hideState"=>"","inputs"=>"","nameFormat"=>"","allowedExtensions"=>"",
                                "captchaType"=>"","pageNumber"=>"","captchaTheme"=>"","simpleCaptchaSize"=>"","simpleCaptchaFontColor"=>"","simpleCaptchaBackgroundColor"=>"",
                                "failed_validation"=>"", "productField" => "", "enablePasswordInput" => "", "maxLength" => "", "enablePrice" => "", "basePrice" => "");

            foreach($form["fields"] as &$field)
                $field = wp_parse_args($field, $all_fields);
        }
        return $form;
    }

    public static function get_grid_column_meta($form_id){
        global $wpdb;

        $table_name =  self::get_meta_table_name();
        return maybe_unserialize($wpdb->get_var($wpdb->prepare("SELECT entries_grid_meta FROM $table_name WHERE form_id=%d", $form_id)));
    }

    public static function update_grid_column_meta($form_id, $columns){
        global $wpdb;

        $table_name = self::get_meta_table_name();
        $meta = maybe_serialize(stripslashes_deep($columns) );
        $wpdb->query( $wpdb->prepare("UPDATE $table_name SET entries_grid_meta=%s WHERE form_id=%d", $meta, $form_id) );
    }

    public static function get_lead_detail_id($current_fields, $field_number){
        foreach($current_fields as $field)
            if($field->field_number == $field_number)
                return $field->id;

        return 0;
    }

    public static function update_form_active($form_id, $is_active){
        global $wpdb;
        $form_table = self::get_form_table_name();
        $sql = $wpdb->prepare("UPDATE $form_table SET is_active=%d WHERE id=%d", $is_active, $form_id);
        $wpdb->query($sql);
    }

    public static function update_forms_active($forms, $is_active){
        foreach($forms as $form_id)
            self::update_form_active($form_id, $is_active);
    }

    public static function update_leads_property($leads, $property_name, $property_value){
        foreach($leads as $lead)
            self::update_lead_property($lead, $property_name, $property_value);
    }

    public static function update_lead_property($lead_id, $property_name, $property_value, $update_akismet=true, $disable_hook=false){
        global $wpdb;
        $lead_table = self::get_lead_table_name();

        $lead = self::get_lead($lead_id);

        //marking entry as "spam" or "not spam" with Akismet if the plugin is installed
        if($update_akismet && GFCommon::akismet_enabled($lead["form_id"]) && $property_name == "status" && in_array($property_value, array("active", "spam"))){

            $current_status = $lead["status"];
            if($current_status == "spam" && $property_value == "active"){
                $form = self::get_form_meta($lead["form_id"]);
                GFCommon::mark_akismet_spam($form, $lead, false);
            }
            else if($current_status == "active" && $property_value == "spam"){
                $form = self::get_form_meta($lead["form_id"]);
                GFCommon::mark_akismet_spam($form, $lead, true);
            }
        }

        //updating lead
        $wpdb->update($lead_table, array($property_name => $property_value ), array("id" => $lead_id));

        if(!$disable_hook){

            $previous_value = rgar($lead, $property_name);

            if($previous_value != $property_value) {

                // if property is status, prev value is spam and new value is active
                if($property_name == 'status' && $previous_value == 'spam' && $property_value == 'active' && !rgar($lead, 'post_id')) {
                    $lead[$property_name] = $property_value;
                    $lead['post_id'] = GFCommon::create_post($form, $lead);
                }

                do_action("gform_update_{$property_name}", $lead_id, $property_value, $previous_value);
            }
        }

    }

    public static function update_lead($lead){
        global $wpdb;
        $lead_table = self::get_lead_table_name();

        $payment_date = strtotime(rgar($lead,"payment_date")) ? "'" . gmdate( 'Y-m-d H:i:s', strtotime("{$lead["payment_date"]}") ) . "'" : "NULL";
        $payment_amount = !rgblank(rgar($lead, "payment_amount")) ? (float) rgar($lead, "payment_amount") : "NULL";
        $transaction_type = !rgempty("transaction_type", $lead) ? intval($lead["transaction_type"]) : "NULL";


        $status = !rgempty("status", $lead) ? $lead["status"] : "active";

        $sql = $wpdb->prepare("UPDATE $lead_table SET
                                    form_id=%d,
                                    post_id=%d,
                                    is_starred=%d,
                                    is_read=%d,
                                    ip=%s,
                                    source_url=%s,
                                    user_agent=%s,
                                    currency=%s,
                                    payment_status=%s,
                                    payment_date={$payment_date},
                                    payment_amount={$payment_amount},
                                    transaction_id=%s,
                                    is_fulfilled=%d,
                                    transaction_type={$transaction_type},
                                    status='{$status}'
                               WHERE id=%d",   rgar($lead,"form_id"), rgar($lead,"post_id"), rgar($lead,"is_starred"), rgar($lead,"is_read"), rgar($lead,"ip"), rgar($lead,"source_url"), rgar($lead,"user_agent"),
                                                rgar($lead,"currency"), rgar($lead,"payment_status"), rgar($lead,"transaction_id"), rgar($lead,"is_fulfilled"), rgar($lead,"id"));
        $wpdb->query($sql);

        self::set_current_lead($lead);
    }

    public static function delete_leads($leads){
        foreach($leads as $lead_id)
            self::delete_lead($lead_id);
    }

    public static function delete_forms($forms){
        foreach($forms as $form_id)
            self::delete_form($form_id);
    }

    public static function delete_leads_by_form($form_id, $status=""){
        global $wpdb;

        if(!GFCommon::current_user_can_any("gravityforms_delete_entries"))
            die(__("You don't have adequate permission to delete entries.", "gravityforms"));

        $lead_table = self::get_lead_table_name();
        $lead_notes_table = self::get_lead_notes_table_name();
        $lead_detail_table = self::get_lead_details_table_name();
        $lead_detail_long_table = self::get_lead_details_long_table_name();

        //deleting uploaded files
        self::delete_files_by_form($form_id, $status);

        $status_filter = empty($status) ? "" : $wpdb->prepare("AND status=%s", $status);

        //Delete from detail long
        $sql = $wpdb->prepare(" DELETE FROM $lead_detail_long_table
                                WHERE lead_detail_id IN(
                                    SELECT ld.id FROM $lead_detail_table ld
                                    INNER JOIN $lead_table l ON l.id = ld.lead_id
                                    WHERE l.form_id=%d AND ld.form_id=%d {$status_filter}
                                )", $form_id, $form_id);
        $wpdb->query($sql);

        //Delete from lead details
        $sql = $wpdb->prepare(" DELETE FROM $lead_detail_table
                                WHERE lead_id IN (
                                    SELECT id FROM $lead_table WHERE form_id=%d {$status_filter}
                                )", $form_id);
        $wpdb->query($sql);

        //Delete from lead notes
        $sql = $wpdb->prepare(" DELETE FROM $lead_notes_table
                                WHERE lead_id IN (
                                    SELECT id FROM $lead_table WHERE form_id=%d {$status_filter}
                                )", $form_id);
        $wpdb->query($sql);

        //Delete from lead
        $sql = $wpdb->prepare("DELETE FROM $lead_table WHERE form_id=%d {$status_filter}", $form_id);
        $wpdb->query($sql);
    }

    public static function delete_views($form_id){
        global $wpdb;

        $form_view_table = self::get_form_view_table_name();

        //Delete form view
        $sql = $wpdb->prepare("DELETE FROM $form_view_table WHERE form_id=%d", $form_id);
        $wpdb->query($sql);
    }

    public static function delete_form($form_id){
        global $wpdb;

        if(!GFCommon::current_user_can_any("gravityforms_delete_forms"))
            die(__("You don't have adequate permission to delete forms.", "gravityforms"));

        do_action("gform_before_delete_form", $form_id);

        $form_meta_table = self::get_meta_table_name();
        $form_table = self::get_form_table_name();

        //Deleting form Entries
        self::delete_leads_by_form($form_id);

        //Delete form meta
        $sql = $wpdb->prepare("DELETE FROM $form_meta_table WHERE form_id=%d", $form_id);
        $wpdb->query($sql);

        //Deleting form Views
        self::delete_views($form_id);

        //Delete form
        $sql = $wpdb->prepare("DELETE FROM $form_table WHERE id=%d", $form_id);
        $wpdb->query($sql);

        do_action("gform_after_delete_form", $form_id);
    }

    public static function duplicate_form($form_id){
        global $wpdb;

        if(!GFCommon::current_user_can_any("gravityforms_create_form"))
            die(__("You don't have adequate permission to create forms.", "gravityforms"));

        //finding unique title
        $form = self::get_form($form_id);
        $count = 2;
        $title = $form->title . " - Copy 1";
        while(!self::is_unique_title($title)){
            $title = $form->title . " - Copy $count";
            $count++;
        }

        //creating new form
        $new_id = self::insert_form($title);

        //copying form meta
        $meta = self::get_form_meta($form_id);
        $meta["title"] = $title;
        $meta["id"] = $new_id;
        self::update_form_meta($new_id, $meta);

        return $new_id;
    }

    public static function is_unique_title($title){
        $forms = self::get_forms();
        foreach($forms as $form){
            if(strtolower($form->title) == strtolower($title))
                return false;
        }

        return true;
    }

    public static function ensure_tables_exist(){
        global $wpdb;
        $form_table_name = self::get_form_table_name();
        $form_count = $wpdb->get_var("SELECT count(0) FROM {$form_table_name}");
        if($wpdb->last_error){
            GFForms::setup(true);
        }
    }

    public static function insert_form($form_title){
        global $wpdb;
        $form_table_name =  $wpdb->prefix . "rg_form";

        //creating new form
        $wpdb->query($wpdb->prepare("INSERT INTO $form_table_name(title, date_created) VALUES(%s, utc_timestamp())", $form_title));

        //returning newly created form id
        return $wpdb->insert_id;

    }

    public static function update_form_meta($form_id, $form_meta, $meta_name="display_meta"){
        global $wpdb;
        $meta_table_name = self::get_meta_table_name();
        $form_meta = maybe_serialize($form_meta);

        if(intval($wpdb->get_var($wpdb->prepare("SELECT count(0) FROM $meta_table_name WHERE form_id=%d", $form_id))) > 0)
            $result = $wpdb->query( $wpdb->prepare("UPDATE $meta_table_name SET $meta_name=%s WHERE form_id=%d", $form_meta, $form_id) );
        else
            $result = $wpdb->query( $wpdb->prepare("INSERT INTO $meta_table_name(form_id, $meta_name) VALUES(%d, %s)", $form_id, $form_meta ) );

        return $result;
    }

    public static function delete_files($lead_id, $form=null){
        $lead = self::get_lead($lead_id);

        if($form == null)
            $form = self::get_form_meta($lead["form_id"]);

        $fields = GFCommon::get_fields_by_type($form, array("fileupload", "post_image"));
        if(is_array($fields)){
            foreach($fields as $field){
                $value = self::get_lead_field_value($lead, $field);
                self::delete_physical_file($value);
            }
        }
    }

    public static function delete_files_by_form($form_id, $status=""){
        global $wpdb;
        $form = self::get_form_meta($form_id);
        $fields = GFCommon::get_fields_by_type($form, array("fileupload", "post_image"));
        if(empty($fields))
            return;

        $status_filter = empty($status) ? "" : $wpdb->prepare("AND status=%s", $status);
        $results = $wpdb->get_results($wpdb->prepare("SELECT id FROM {$wpdb->prefix}rg_lead WHERE form_id=%d {$status_filter}", $form_id), ARRAY_A);

        foreach($results as $result){
            self::delete_files($result["id"], $form);
        }
    }

    public static function delete_file($lead_id, $field_id){
        global $wpdb;

        if($lead_id == 0 || $field_id == 0)
            return;

        $lead_detail_table = self::get_lead_details_table_name();

        //Deleting file
        $sql = $wpdb->prepare("SELECT value FROM $lead_detail_table WHERE lead_id=%d AND field_number BETWEEN %s AND %s", $lead_id, doubleval($field_id) - 0.001, doubleval($field_id) + 0.001);
        $file_path = $wpdb->get_var($sql);

        self::delete_physical_file($file_path);

        //Delete from lead details
        $sql = $wpdb->prepare("DELETE FROM $lead_detail_table WHERE lead_id=%d AND field_number BETWEEN %s AND %s", $lead_id, doubleval($field_id) - 0.001, doubleval($field_id) + 0.001);
        $wpdb->query($sql);
    }

    private static function delete_physical_file($file_url){
        $ary = explode("|:|", $file_url);
        $url = rgar($ary,0);
        if(empty($url))
            return;

        //Convert from url to physical path
        if (is_multisite()) {
            $file_path = preg_replace("|^(.*?)/files/gravity_forms/|", BLOGUPLOADDIR . "gravity_forms/", $url);
        }
        else {
            $file_path = str_replace(WP_CONTENT_URL, WP_CONTENT_DIR, $url);
        }

        if(file_exists($file_path)){
            unlink($file_path);
        }
    }

    public static function delete_field($form_id, $field_id){
        global $wpdb;

        if($form_id == 0)
            return;

        do_action("gform_before_delete_field", $form_id, $field_id);

        $lead_table = self::get_lead_table_name();
        $lead_detail_table = self::get_lead_details_table_name();
        $lead_detail_long_table = self::get_lead_details_long_table_name();


        $form = self::get_form_meta($form_id);

        $field_type = "";

        //Deleting field from form meta
        $count = sizeof($form["fields"]);
        for($i = $count-1; $i >= 0; $i--){
            $field = $form["fields"][$i];

            //Deleting associated conditional logic rules
            if(!empty($field["conditionalLogic"])){
                $rule_count = sizeof($field["conditionalLogic"]["rules"]);
                for($j = $rule_count-1; $j >= 0; $j--){
                    if($field["conditionalLogic"]["rules"][$j]["fieldId"] == $field_id){
                        unset($form["fields"][$i]["conditionalLogic"]["rules"][$j]);
                    }
                }
                $form["fields"][$i]["conditionalLogic"]["rules"] = array_values($form["fields"][$i]["conditionalLogic"]["rules"]);

                //If there aren't any rules, remove the conditional logic
                if(sizeof($form["fields"][$i]["conditionalLogic"]["rules"]) == 0){
                    $form["fields"][$i]["conditionalLogic"] = false;
                }
            }

            //Deleting field from form meta
            if($field["id"] == $field_id){
                $field_type = $field["type"];
                unset($form["fields"][$i]);
            }

        }

        //removing post content and title template if the field being deleted is a post content field or post title field
        if($field_type == "post_content"){
            $form["postContentTemplateEnabled"] = false;
            $form["postContentTemplate"] = "";
        }
        else if($field_type == "post_title"){
            $form["postTitleTemplateEnabled"] = false;
            $form["postTitleTemplate"] = "";
        }

        //Deleting associated routing rules
        if(!empty($form["notification"]["routing"])){
            $routing_count = sizeof($form["notification"]["routing"]);
            for($j = $routing_count-1; $j >= 0; $j--){
                if(intval($form["notification"]["routing"][$j]["fieldId"]) == $field_id){
                    unset($form["notification"]["routing"][$j]);
                }
            }
            $form["notification"]["routing"] = array_values($form["notification"]["routing"]);

            //If there aren't any routing, remove it
            if(sizeof($form["notification"]["routing"]) == 0){
                $form["notification"]["routing"] = null;
            }
        }

        $form["fields"] = array_values($form["fields"]);
        self::update_form_meta($form_id, $form);

        //Delete from grid column meta
        $columns = self::get_grid_column_meta($form_id);
        $count = sizeof($columns);
        for($i = $count -1; $i >=0; $i--)
        {
            if(intval(rgar($columns,$i)) == intval($field_id)){
                unset($columns[$i]);
            }
        }
        self::update_grid_column_meta($form_id, $columns);

        //Delete from detail long
        $sql = $wpdb->prepare(" DELETE FROM $lead_detail_long_table
                                WHERE lead_detail_id IN(
                                    SELECT id FROM $lead_detail_table WHERE form_id=%d AND field_number >= %d AND field_number < %d
                                )", $form_id, $field_id, $field_id + 1);
        $wpdb->query($sql);

        //Delete from lead details
        $sql = $wpdb->prepare("DELETE FROM $lead_detail_table WHERE form_id=%d AND field_number >= %d AND field_number < %d", $form_id, $field_id, $field_id + 1);
        $wpdb->query($sql);

        //Delete leads with no details
        $sql = $wpdb->prepare(" DELETE FROM $lead_table
                                WHERE form_id=%d
                                AND id NOT IN(
                                    SELECT DISTINCT(lead_id) FROM $lead_detail_table WHERE form_id=%d
                                )", $form_id, $form_id);
        $wpdb->query($sql);

        do_action("gform_after_delete_field", $form_id, $field_id);
    }

    public static function delete_lead($lead_id){
        global $wpdb;

        if(!GFCommon::current_user_can_any("gravityforms_delete_entries"))
            die(__("You don't have adequate permission to delete entries.", "gravityforms"));

        do_action("gform_delete_lead", $lead_id);

        $lead_table = self::get_lead_table_name();
        $lead_notes_table = self::get_lead_notes_table_name();
        $lead_detail_table = self::get_lead_details_table_name();
        $lead_detail_long_table = self::get_lead_details_long_table_name();

        //deleting uploaded files
        self::delete_files($lead_id);

        //Delete from detail long
        $sql = $wpdb->prepare(" DELETE FROM $lead_detail_long_table
                                WHERE lead_detail_id IN(
                                    SELECT id FROM $lead_detail_table WHERE lead_id=%d
                                )", $lead_id);
        $wpdb->query($sql);

        //Delete from lead details
        $sql = $wpdb->prepare("DELETE FROM $lead_detail_table WHERE lead_id=%d", $lead_id);
        $wpdb->query($sql);

        //Delete from lead notes
        $sql = $wpdb->prepare("DELETE FROM $lead_notes_table WHERE lead_id=%d", $lead_id);
        $wpdb->query($sql);

        //Delete from lead meta
        gform_delete_meta($lead_id);

        //Delete from lead
        $sql = $wpdb->prepare("DELETE FROM $lead_table WHERE id=%d", $lead_id);
        $wpdb->query($sql);

    }

    public static function add_note($lead_id, $user_id, $user_name, $note){
        global $wpdb;

        $table_name = self::get_lead_notes_table_name();
        $sql = $wpdb->prepare("INSERT INTO $table_name(lead_id, user_id, user_name, value, date_created) values(%d, %d, %s, %s, utc_timestamp())", $lead_id, $user_id, $user_name, $note);

        $wpdb->query($sql);
    }

    public static function delete_note($note_id){
        global $wpdb;

        if(!GFCommon::current_user_can_any("gravityforms_edit_entry_notes"))
            die(__("You don't have adequate permission to delete notes.", "gravityforms"));

        $table_name = self::get_lead_notes_table_name();
        $sql = $wpdb->prepare("DELETE FROM $table_name WHERE id=%d", $note_id);
        $wpdb->query($sql);
    }

    public static function delete_notes($notes){
        if(!is_array($notes))
            return;

        foreach($notes as $note_id){
            self::delete_note($note_id);
        }
    }

    public static function get_ip(){
        $ip = rgget("HTTP_X_FORWARDED_FOR", $_SERVER);
        if (!$ip)
            $ip = rgget("REMOTE_ADDR", $_SERVER);

        $ip_array = explode(",", $ip); //HTTP_X_FORWARDED_FOR can return a comma separated list of IPs. Using the first one.
        return $ip_array[0];
    }

    public static function save_lead($form, &$lead){
        global $wpdb;

        GFCommon::log_debug("Saving entry.");

        if(IS_ADMIN && !GFCommon::current_user_can_any("gravityforms_edit_entries"))
            die(__("You don't have adequate permission to edit entries.", "gravityforms"));

        $lead_detail_table = self::get_lead_details_table_name();

        //Inserting lead if null
        if($lead == null){
            global $current_user;
            $user_id = $current_user && $current_user->ID ? $current_user->ID : 'NULL';

            $lead_table = RGFormsModel::get_lead_table_name();
            $user_agent = strlen($_SERVER["HTTP_USER_AGENT"]) > 250 ? substr($_SERVER["HTTP_USER_AGENT"], 0, 250) : $_SERVER["HTTP_USER_AGENT"];
            $currency = GFCommon::get_currency();
            $wpdb->query($wpdb->prepare("INSERT INTO $lead_table(form_id, ip, source_url, date_created, user_agent, currency, created_by) VALUES(%d, %s, %s, utc_timestamp(), %s, %s, {$user_id})", $form["id"], self::get_ip(), self::get_current_page_url(), $user_agent, $currency));



            //reading newly created lead id
            $lead_id = $wpdb->insert_id;
            $lead = array("id" => $lead_id);

            GFCommon::log_debug("Entry record created in the database. ID: {$lead_id}");
        }

        $current_fields = $wpdb->get_results($wpdb->prepare("SELECT id, field_number FROM $lead_detail_table WHERE lead_id=%d", $lead["id"]));
        $original_post_id = rgget("post_id", $lead);

        $total_field = null;
        $calculation_fields = array();
        $recalculate_total = false;

        GFCommon::log_debug("Saving entry fields.");

        foreach($form["fields"] as $field){

            //Ignore fields that are marked as display only
            if(rgget("displayOnly", $field) && $field["type"] != "password"){
                continue;
            }

            //ignore pricing fields in the entry detail
            if(RG_CURRENT_VIEW == "entry" && GFCommon::is_pricing_field($field["type"])){
                continue;
            }


            //process total field after all fields have been saved
            if($field["type"] == "total"){
                $total_field = $field;
                continue;
            }

            //only save fields that are not hidden (except on entry screen)
            if(RG_CURRENT_VIEW == "entry" || !RGFormsModel::is_field_hidden($form, $field, array()) ){

                // process calculation fields after all fields have been saved (moved after the is hidden check)
                if( GFCommon::has_field_calculation($field) ) {
                    $calculation_fields[] = $field;
                    continue;
                }

                GFCommon::log_debug("Saving field {$field["label"]}");

                if($field['type'] == 'post_category')
                    $field = GFCommon::add_categories_as_choices($field, '');

                if(isset($field["inputs"]) && is_array($field["inputs"])){

                    foreach($field["inputs"] as $input)
                        self::save_input($form, $field, $lead, $current_fields, $input["id"]);
                }
                else{
                    self::save_input($form, $field, $lead, $current_fields, $field["id"]);
                }
            }
        }

        if(!empty($calculation_fields)) {
            foreach($calculation_fields as $calculation_field) {

                GFCommon::log_debug("Saving calculated field {$calculation_field["label"]}");

                if(isset($calculation_field["inputs"]) && is_array($calculation_field["inputs"])){
                    foreach($calculation_field["inputs"] as $input) {
                        self::save_input($form, $calculation_field, $lead, $current_fields, $input["id"]);
                    }
                }
                else{
                    self::save_input($form, $calculation_field, $lead, $current_fields, $calculation_field["id"]);
                }

            }
            self::refresh_product_cache($form, $lead = RGFormsModel::get_lead($lead['id']));
        }

        //saving total field as the last field of the form.
        if($total_field) {
            GFCommon::log_debug("Saving total field.");
            self::save_input($form, $total_field, $lead, $current_fields, $total_field["id"]);
        }

    }

    public static function create_lead($form) {
        global $current_user;

        $calculation_fields = array();

        $lead = array();
        $lead['id'] = null;
        $lead['post_id'] = null;
        $lead['date_created'] = null;
        $lead['form_id'] = $form['id'];
        $lead['ip'] = self::get_ip();
        $lead['source_url'] = self::get_current_page_url();
        $lead['user_agent'] = strlen($_SERVER['HTTP_USER_AGENT']) > 250 ? substr($_SERVER['HTTP_USER_AGENT'], 0, 250) : $_SERVER['HTTP_USER_AGENT'];
        $lead['currency'] = GFCommon::get_currency();
        $lead['created_by'] = $current_user && $current_user->ID ? $current_user->ID : 'NULL';

        foreach($form['fields'] as $field) {

            // ignore fields that are marked as display only
            if(rgget('displayOnly', $field) && $field['type'] != 'password'){
                continue;
            }

            // process total field after all fields have been saved
            if($field['type'] == 'total'){
                $total_field = $field;
                continue;
            }

            // process calculation fields after all fields have been saved
            if(GFCommon::has_field_calculation($field)) {
                $calculation_fields[] = $field;
                continue;
            }

            // only save fields that are not hidden
            if(!RGFormsModel::is_field_hidden($form, $field, array()) ){

                if($field['type'] == 'post_category')
                    $field = GFCommon::add_categories_as_choices($field, '');

                if(isset($field['inputs']) && is_array($field['inputs'])){
                    foreach($field['inputs'] as $input) {
                        $lead[(string)$input['id']] = self::get_prepared_input_value($form, $field, $lead, $input["id"]);
                    }
                }
                else {
                    $lead[$field['id']] = self::get_prepared_input_value($form, $field, $lead, $field["id"]);
                }
            }
        }

        if(!empty($calculation_fields)) {
            foreach($calculation_fields as $field) {
                if(isset($field["inputs"]) && is_array($field["inputs"])){
                    foreach($field["inputs"] as $input) {
                        $lead[(string)$input['id']] = self::get_prepared_input_value($form, $field, $lead, $input["id"]);
                    }
                }
                else{
                    $lead[$field['id']] = self::get_prepared_input_value($form, $field, $lead, $field["id"]);
                }
            }
            self::refresh_product_cache($form, $lead);
        }

        // saving total field as the last field of the form.
        if(isset($total_field)) {
            $lead[$total_field['id']] = self::get_prepared_input_value($form, $total_field, $lead, $total_field["id"]);
        }

        return $lead;
    }

    public static function get_prepared_input_value($form, $field, $lead, $input_id) {

        $input_name = "input_" . str_replace('.', '_', $input_id);
        $value = rgpost($input_name);

        if(empty($value) && rgar($field, "adminOnly") && !IS_ADMIN){
            $value = self::get_default_value($field, $input_id);
        }

        switch(self::get_input_type($field)) {

        case "post_image":
            $file_info = self::get_temp_filename($form['id'], $input_name);
            $file_path = self::get_file_upload_path($form['id'], $file_info["uploaded_filename"]);
            $url = $file_path['url'];

            $image_title = isset($_POST["{$input_name}_1"]) ? strip_tags($_POST["{$input_name}_1"]) : "";
            $image_caption = isset($_POST["{$input_name}_4"]) ? strip_tags($_POST["{$input_name}_4"]) : "";
            $image_description = isset($_POST["{$input_name}_7"]) ? strip_tags($_POST["{$input_name}_7"]) : "";

            $value = !empty($url) ? $url . "|:|" . $image_title . "|:|" . $image_caption . "|:|" . $image_description : "";
            break;

        case "fileupload" :
            $file_info = self::get_temp_filename($form['id'], $input_name);
            $file_path = self::get_file_upload_path($form['id'], $file_info["uploaded_filename"]);
            $value = $file_path['url'];
            break;

        default:

            // processing values so that they are in the correct format for each input type
            $value = self::prepare_value($form, $field, $value, $input_name, rgar($lead, 'id'), $lead);

        }

        return apply_filters("gform_save_field_value", $value, $lead, $field, $form);
    }

    public static function refresh_product_cache($form, $lead, $use_choice_text = false, $use_admin_label = false) {

        $cache_options = array(
            array(false, false),
            array(false, true),
            array(true, false),
            array(true, true)
            );

        foreach($form["fields"] as $field){
            if(GFCommon::has_field_calculation($field)){
                //deleting field value cache for calculated fields
                $cache_key = "GFFormsModel::get_lead_field_value_" . $lead["id"] . "_" . $field["id"];
                GFCache::delete($cache_key);
            }
        }

        foreach($cache_options as $cache_option) {
            list($use_choice_text, $use_admin_label) = $cache_option;
            if( gform_get_meta( rgar($lead,'id'), "gform_product_info_{$use_choice_text}_{$use_admin_label}") ) {
                gform_delete_meta(rgar($lead,'id'), "gform_product_info_{$use_choice_text}_{$use_admin_label}");
                GFCommon::get_product_fields($form, $lead, $use_choice_text, $use_admin_label);
            }
        }

    }

    /**
     * Check whether a field is hidden via conditional logic.
     *
     * @param array $form Form object.
     * @param array $field Field object.
     * @param array $field_values Default field values for this form. Used when form has not yet been submitted. Pass an array if no default field values are avilable/required.
     * @return array $lead Optional, default is null. If lead object is available, pass the lead.
     */
    public static function is_field_hidden($form, $field, $field_values, $lead=null){

        $cache_key = "GFFormsModel::is_field_hidden_" . $form["id"] . "_" . $field["id"];
        $display = GFCache::get($cache_key);
        if($display !== false)
            return $display;

        $section = self::get_section($form, $field["id"]);
        $section_display = self::get_field_display($form, $section, $field_values, $lead);

        //if section is hidden, hide field no matter what. if section is visible, see if field is supposed to be visible
        if($section_display == "hide"){
            $display = "hide";
        }
        else if(self::is_page_hidden($form, rgar($field,"pageNumber"), $field_values, $lead)){
            $display = "hide";
        }
        else{
            $display = self::get_field_display($form, $field, $field_values, $lead);
            return $display == "hide";
        }

        GFCache::set($cache_key, $display);

        return $display == "hide";
    }

    public static function is_page_hidden($form, $page_number, $field_values, $lead=null){
        $page = self::get_page_by_number($form, $page_number);

        if(!$page)
            return false;

        $display = self::get_field_display($form, $page, $field_values, $lead…