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87 lines
2.5 KiB
PHP
87 lines
2.5 KiB
PHP
<?php
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class Item_quantity extends CI_Model
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{
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function exists($item_id, $location_id)
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{
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$this->db->from('item_quantities');
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$this->db->where('item_id', $item_id);
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$this->db->where('location_id', $location_id);
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$query = $this->db->get();
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return ($query->num_rows()==1);
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}
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function save($location_detail, $item_id, $location_id)
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{
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if (!$this->exists($item_id, $location_id))
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{
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if($this->db->insert('item_quantities', $location_detail))
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{
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return true;
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}
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return false;
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}
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$this->db->where('item_id', $item_id);
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$this->db->where('location_id', $location_id);
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return $this->db->update('item_quantities', $location_detail);
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}
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function get_item_quantity($item_id, $location_id)
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{
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$this->db->from('item_quantities');
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$this->db->where('item_id', $item_id);
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$this->db->where('location_id', $location_id);
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$result = $this->db->get()->row();
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if(empty($result) == true)
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{
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//Get empty base parent object, as $item_id is NOT an item
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$result = new stdClass();
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//Get all the fields from items table (TODO to be reviewed)
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$fields = $this->db->list_fields('item_quantities');
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foreach($fields as $field)
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{
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$result->$field = '';
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}
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$result->quantity = 0;
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}
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return $result;
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}
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/*
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* changes to quantity of an item according to the given amount.
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* if $quantity_change is negative, it will be subtracted,
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* if it is positive, it will be added to the current quantity
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*/
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function change_quantity($item_id, $location_id, $quantity_change)
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{
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$quantity_old = $this->get_item_quantity($item_id, $location_id);
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$quantity_new = $quantity_old->quantity + intval($quantity_change);
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$location_detail = array('item_id'=>$item_id, 'location_id'=>$location_id, 'quantity'=>$quantity_new);
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return $this->save($location_detail, $item_id, $location_id);
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}
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/*
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* Set to 0 all quantity in the given item
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*/
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function reset_quantity($item_id)
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{
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$this->db->where('item_id', $item_id);
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return $this->db->update('item_quantities', array('quantity'=>0));
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}
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/*
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* Set to 0 all quantity in the given list of items
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*/
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function reset_quantity_list($item_ids)
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{
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$this->db->where_in('item_id', $item_ids);
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return $this->db->update('item_quantities', array('quantity'=>0));
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}
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}
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?>
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