magento cron in backend configuration

Question

So I know how to setup a cron using the config.xml crontab stuff:

Answer 1

A proof of concept. Modify to your needs:

getGroupId();

        $cronStringPath = 'crontab/jobs/company_export_send_' . $groupId . '/schedule/cron_expr';
        $cronModelPath = 'crontab/jobs/company_export_send_' . $groupId . '/run/model';

        $value = $this->getData('groups/' . $groupId . '/fields/cron_setting/value');

        Mage::getModel('core/config_data')
        ->load($cronStringPath, 'path')
            ->setValue($value)
            ->setPath($cronStringPath)
            ->save();
        Mage::getModel('core/config_data')
            ->load($cronModelPath, 'path')
            ->setValue((string) Mage::getConfig()->getNode($cronModelPath))
            ->setPath($cronModelPath)
            ->save();           

    }
}

and the config.xml:

    
        
            0.1.0
        
    
    
        
            
                Company_Export_Model
            
        
        
            
                Company_Export_Helper
            
        
        
            
                
                    Company_Export
                
                
                    core_setup
                
            
            
                
                    core_write
                
            
            
                
                    core_read
                
            
        
    
     
         
             
                 
                     
                         
                             
                                 
                                     
                                         
                                             
                                         
                                     
                                 
                             
                         
                     
                 
             
         
    
    
                        
            
                company_export/observer::exportOrderData
            
        
    

and system.xml:

    
        
            Feeds Configuration
            99999
        
    
    
        
            Export
            feedsconfig
            text
            10000
            1
            0
            0
            
                
                    Order
                    text
                    2
                    1
                    0
                    0
                    
                         
                            How often do you want the cron to run?
                            text
                            company_export/config_cron
                            40
                            Use Crontab Format (Eg. "*/5 * * * *" for every 5 minutes)
                            1
                            0
                            0