Просмотр файла news/classes/Paginator.php

<?php
class Paginator
{
	public function __construct($records, $on_page, $link = '?')
	{
		/* Всего записей */
        $this->all_records = $records;
    
		$this->link = $link;

		$this->on_page = $on_page < 1 ? 1 : $on_page;
    
		$this->all_pages = ceil($this->all_records / $this->on_page);
    
		$this->page = !isset($_GET['page']) || $_GET['page'] <= 0 ? 1 : abs(intval($_GET['page']));
		
		$this->page = $this->page > $this->all_pages ? $this->all_pages : $this->page;

		$this->page = isset($_GET['last']) ? $this->all_pages : $this->page;    
    
		$this->start = ($this->page * $this->on_page) - 1;

		$this->start = $this->start > $this->all_records  ? $this->all_records : $this->start;

		$this->end   = ($this->page * $this->on_page)- $this->on_page;

		$this->last_three_page = $this->all_pages - 2;
		
		$this->lt = '&#8592; ';
		$this->gt = ' &#8594;';
	}

	public function pagination()
	{
		$string_pages = null;
		
		if($this->all_pages > 10)
		{
			if($this->page <= 3)
			{
				for($i=1; $i <= 3; $i++)
				{
					$string_pages .= $this->page == $i ? ' '.$i.' ' : ' <a href="'.$this->link.'page='.$i.'">'.$i.'</a> ';
				}
            
				if($this->page == 3)
				{
					$string_pages .= ' <a href="'.$this->link.'page=4">4</a> ';
				}

				$string_pages .= '...';
            
				for($i = $this->last_three_page; $i <= $this->all_pages; $i++)
				{
					$string_pages .= $this->page == $i ? ' '.$i.' ' : ' <a href="'.$this->link.'page='.$i.'">'.$i.'</a> ';
				}
            
			}
			elseif($this->page < 6 && $this->page <= $this->last_three_page)
			{
				for($i=1;$i<=6;$i++)
				{
					$string_pages .= $this->page == $i ? ' '.$i.' ' : ' <a href="'.$this->link.'page='.$i.'">'.$i.'</a> ';
				}
            
				$string_pages .= '...';
            
				for($i = $this->last_three_page; $i <= $this->all_pages; $i++)
				{
					$string_pages .= $this->page == $i ? ' '.$i.' ' : ' <a href="'.$this->link.'page='.$i.'">'.$i.'</a> ';
				}
			}
			elseif($this->page >= 6 && $this->page <= ($this->last_three_page - 2))
			{
				for($i=1;$i<=3;$i++)
				{
					$string_pages .= $this->page == $i ? ' '.$i.' ' : ' <a href="'.$this->link.'page='.$i.'">'.$i.'</a> ';
				}
				
				$string_pages .= '...';
				$string_pages .= ' <a href="'.$this->link.'page='.($this->page - 1).'">'.($this->page - 1).'</a> ';
				$string_pages .= ' '.$this->page.' ';
				$string_pages .= ' <a href="'.$this->link.'page='.($this->page + 1).'">'.($this->page + 1).'</a> ';
				$string_pages .= '...';
            
				for($i = ($this->last_three_page); $i <= $this->all_pages; $i++)
				{
					$string_pages .= $this->page == $i ? ' '.$i.' ' : ' <a href="'.$this->link.'page='.$i.'">'.$i.'</a> ';
				}
			}
			elseif(($this->page + 1) >= ($this->last_three_page))
			{
				for($i=1; $i <= 3; $i++)
				{
					$string_pages .= $this->page == $i ? ' '.$i.' ' : ' <a href="'.$this->link.'page='.$i.'">'.$i.'</a> ';
				}

				$string_pages .= '...';
            
				for($i = ($this->last_three_page - 3); $i <= $this->all_pages; $i++)
				{
					$string_pages .= $this->page == $i ? ' '.$i.' ' : ' <a href="'.$this->link.'page='.$i.'">'.$i.'</a> ';
				}
			}
		}
		else
		{
			for($i=1;$i<=$this->all_pages;$i++)
			{
				$string_pages .= $this->page == $i ? ' '.$i.' ' : ' <a href="'.$this->link.'page='.$i.'">'.$i.'</a> ';
			}
		}
		return $string_pages; 
	}

	public function back_forward_links($next, $back, $razdelitel = ' | ' , $poradok = true)
	{
		if($poradok === true)
		{
			if($this->page <= 1)
			{
				$this->this_links = '<a href="'.$this->link.'page='.($this->page+1).'">'.$next.$this->gt.'</a>';
			}
			elseif($this->page >= $this->all_pages)
			{
				$this->this_links = '<a href="'.$this->link.'page='.($this->page-1).'">'.$this->lt.$back.'</a>';
			}
			else
			{
				$this->this_links = '<a href="'.$this->link.'page='.($this->page-1).'">'.$this->lt.$back.'</a>'.$razdelitel.'<a href="'.$this->link.'page='.($this->page+1).'">'.$next.$this->gt.'</a>';
			}
		}
		else
		{
			if($this->page <= 1)
			{
				$this->this_links = '<a href="'.$this->link.'page='.($this->page+1).'">'.$back.$this->gt.'</a>';
			}
			elseif($this->page >= $this->all_pages)
			{
				$this->this_links = '<a href="'.$this->link.'page='.($this->page-1).'">'.$this->lt.$next.'</a>';
			}
			else
			{
				$this->this_links = '<a href="'.$this->link.'page='.($this->page-1).'">'.$this->lt.$next.'</a>'.$razdelitel.'<a href="'.$this->link.'page='.($this->page+1).'">'.$back.$this->gt.'</a>';
			}
		}
    
		return $this->this_links;
	}

	public function show_form($value = 'GO', $array = array())
	{
		$hidden = null;

		if(count($array) > 0)
		{
			foreach($array as $key => $value)
			{
				$hidden .= '<input type="hidden" name="'.$key.'" value="'.$value.'" />';
			}
		}
    
		return '<form action="" method="get">'.
		$hidden.
		'<input type="text" size="2" name="page" value="'.$this->page.'" />'.
		'<input type="submit" value="'.$value.'" />'.    
		'</form>';
	}

	function limit()
	{
		return 'LIMIT '.(($this->page*$this->on_page)-$this->on_page).', '.$this->on_page;
	}
	
	function count()
	{
		if($this->all_records > $this->on_page)
		{
			return true;
		}
		else
		{
			return false;
		}
	}
}