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Editing: access.php

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<?php
class am4AccessRequirement {
    public $id; 
    public $type; 
    public $start; 
    public $stop;
    public $status;
    
    function __construct($record=array()){
        if($record) $this->fromArray($record);
    }
    function checkAccess(am4AccessCacheRecord $a){
        // Check record type; 
        if(($this->id != am4Access::ANY_PRODUCT) && ($this->type != $a->type)) return false;
        // Check record id; -1 means any; 
        if($this->id != am4Access::ANY_PRODUCT && $this->id != $a->id) return false;
        // Check status; 
        if(!in_array($a->status, $this->status)) return false;
        // Check period;
        if(($a->days < $this->start) || ($a->days > $this->stop)) return false;
        
        return true;
    }
    
    static function createRequirements(){
        $req = array();
        $args = func_get_args();
        foreach((array) $args as $records)
            foreach((array)$records as $type => $r){
                foreach((array)$r as $id=>$v){
                    $req[] = new self(array(  'type'  =>  $type,
                                        'id'    =>  $id,
                                        'start' =>  $v['start'],
                                        'stop'  =>  $v['stop']
                                        ));
                }
            }
        return $req;
    }
    
    function toArray(){
        throw new Exception("Not implemented!");
    }
    function fromArray($record){
        $this->id  = $record['id'];
        $this->type = $record['type'];
        $this->start = intval($record['start']);
        $this->stop = intval($record['stop']);
        if($this->stop == -1)
            $this->status = array(am4Access::ACTIVE, am4Access::EXPIRED);
        else
            $this->status = array(am4Access::ACTIVE);
        if($this->stop <= 0) $this->stop = PHP_INT_MAX;
    }
    
    function __toString() {
        $value = '';
        if($this->id){
            
            switch($this->type){
                case am4Access::PRODUCT : $titles = am4PluginsManager::getAMProducts(); 
                                          break;
                case am4Access::CATEGORY : $titles = am4PluginsManager::getAMCategories(); 
                                          break;
                default: throw new Exception('Unknown record type!');
            }
            if($this->id == -1)
                $value = "<b>"._('Any Product')."</b> ";
            else
                $value = "<b>".$titles[$this->id]."</b> ";
                
            $value .= _(' from ').($this->start==0 ? _('start') : $this->start.'d')._(' to ').(in_array(am4Access::EXPIRED, $this->status) ? _(' forever ') : ($this->stop == PHP_INT_MAX ? _('expiration') : $this->stop.'d'));
            return $value;
        }
        return $value;
            
    }
    
}

class am4AccessCacheRecord {
    public $id; 
    public $type;
    public $days;
    public $status;
    
    function __construct(Array $record){
        $this->id = $record['id'];
        $this->type = $record['type'];
        $this->days = $record['days'];
        $this->status  = $record['status'];
    }
}

// User access class. All cache records that user have.
class am4Access {
    private $cache = array();
    const PRODUCT = 'product';
    const CATEGORY = 'category';
    const FOREVER = -1;
    const EXPIRATION = 0;
    const START = 0;
    const ANY_PRODUCT = -1;
    const ACTIVE  = 'active';
    const EXPIRED = 'expired';
    
    function __construct(){
        
    }
    
    function addRecord(am4AccessCacheRecord $c){
        $this->cache[] = $c;
    }
    
    function getRecords(){
        return $this->cache;
    }
    
    
    function checkRequirement(am4AccessRequirement $r){
        foreach($this->getRecords() as $a){
            if($r->checkAccess($a)) return true;
        }
        return false;
    }
    
    // return true when all requirements are true;
    function allTrue(Array $req){
        $ret = true;
        foreach($req as $r){
            $ret = $ret && $this->checkRequirement($r);
        }
        return $ret;
    }

// return true when all requirements are false;
    function allFalse(Array $req){
        $ret = false;
        foreach($req as $r){
            $ret = $ret || $this->checkRequirement($r);
        }
        return !$ret;
    }
    
    // return true when any requirement is true; 
    function anyTrue(Array $req){
        foreach($req as $r){
            if($this->checkRequirement($r)) return true;
        }
        return false;
    }
    
    //return false when any requirement is false; 
    function anyFalse(Array $req){
        foreach($req as $r){
            if(!$this->checkRequirement($r)) return true;
        }
        
    }
    
}

class am4UserAccess extends am4Access{
    private $user_id;
    function __construct(){
        if($this->isLoggedIn()){
            foreach((array)$this->getAccessCache() as $a){
                $this->addRecord(new am4AccessCacheRecord(
                        array(     'type'   => ($a['fn'] == 'product_id' ? self::PRODUCT : self::CATEGORY),
                                   'days'   =>  $a['days'],
                                   'id'     =>  $a['id'],
                                   'status' =>  $a['status']
                                    )                        
                        ));
            }
        }
    }
    
    function isLoggedIn(){
        return am4PluginsManager::getAPI()->isLoggedIn();
    }
    function getAccessCache(){
        return am4PluginsManager::getAPI()->getAccessCache();
    }
}

Editing: access.php

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