<?php

class Paginator {
    public $count, $limit, $page, $totalpages, $offset;

    function __construct($count, $limit, $page = 1) {
        $totalpages = ceil($count/$limit);

        if (!isset($page) or empty($page) or !is_numeric($page)) {
            $page = 1;
        } elseif ($page < 1) {
            $page = 1;
        } elseif ($page > $totalpages) {
            $page = $totalpages;
        }

        $offset = ($limit * ($page - 1));

        $this->count = $count;
        $this->limit = $limit;
        $this->page = $page;
        $this->totalpages = $totalpages;
        $this->offset = $offset;
    }

    function rounder($num) {
    	if (is_numeric($num) && $num < 1) {
    		return 1;
    	} else {
    		return $num;
    	}
    }

    function get_before() {
        $rempages = $this->totalpages - $this->page;
    	$magic = $this->rounder($this->totalpages - 4);
    	$before = array();

    	switch ($this->page) {
    	    case 1:
    	        return $before;
        		break;

        	case 2:
        	    $before['Prev'] = $this->page - 1;
        		$before[1] = 1;
        		return $before;
        		break;

        	case 3:
        	    $before['First'] = 1;
        		$before['Prev'] = $this->page - 1;
        		$before[1] = 1;
        		$before[2] = 2;
        		return $before;
        		break;

        	case ($this->page > 3):
        	    $before['First'] = 1;
        	    $before['Prev'] = $this->page - 1;
        	    if ($rempages > 1) {
        	        $before[$this->page - 2] = $this->page - 2;
        	        $before[$this->page - 1] = $this->page - 1;
        	        return $before;
        	        break;
        	    } elseif ($rempages == 1) {
        	        for ($i=$magic; $i < ($this->totalpages - 1); $i++) {
        	            $before[$i] = $i;
        	        }
        	        return $before;
        	        break;
        	    } elseif ($rempages == 0) {
        	        for ($i=$magic; $i < $this->totalpages; $i++) {
        	            $before[$i] = $i;
        	        }
        	        return $before;
        	        break;
        	    }
    	}
    }

    function get_after() {
        $rempages = $this->totalpages - $this->page;
    	$after = array();

    	switch ($rempages) {
    	    case 0:
    	        return $after;
    	        break;

    	    case 1:
    	        $after[$this->page + 1] = $this->page + 1;
        		$after['Next'] = $this->page + 1;
        		return $after;
        		break;

        	case 2:
        	    $after[$this->page + 1] = $this->page + 1;
        		$after[$this->page + 2] = $this->page + 2;
        		$after['Next'] = $this->page + 1;
        		$after['Last'] = $this->totalpages;
        		return $after;
        		break;

        	case 3:
        	    if ($this->page >= 3) {
        	        $after[$this->page + 1] = $this->page + 1;
            		$after[$this->page + 2] = $this->page + 2;
            		$after['Next'] = $this->page + 1;
            		$after['Last'] = $this->totalpages;
            		return $after;
            		break;
        	    } elseif ($this->page <= 2) {
        	        $after[$this->page + 1] = $this->page + 1;
            		$after[$this->page + 2] = $this->page + 2;
            		$after[$this->page + 3] = $this->page + 3;
            		$after['Next'] = $this->page + 1;
            		$after['Last'] = $this->totalpages;
            		return $after;
            		break;
        	    }

        	case ($rempages >= 4):
        	    if ($this->page >= 3) {
        	        $after[$this->page + 1] = $this->page + 1;
            		$after[$this->page + 2] = $this->page + 2;
            		$after['Next'] = $this->page + 1;
            		$after['Last'] = $this->totalpages;
            		return $after;
            		break;
        	    } elseif ($this->page <= 2) {
        	        $after[$this->page + 1] = $this->page + 1;
            		$after[$this->page + 2] = $this->page + 2;
            		$after[$this->page + 3] = $this->page + 3;
            		$after[$this->page + 4] = $this->page + 4;
            		$after['Next'] = $this->page + 1;
            		$after['Last'] = $this->totalpages;
            		return $after;
            		break;
        	    }
    	}
    }

    function get_pages_array() {
        return ($this->get_before() + array($this->page => $this->page) + $this->get_after());
    }

    function get_pages_html($script = null) {
        $pages_array = $this->get_pages_array();

        if (!$pages_array) {
            return;
        }

        if (count($pages_array) === 1) {
            return;
        }

        $html = '';
        foreach ($pages_array as $k => $v) {
    		if ($k == 'First' or $k == 'Last' or $k == 'Next' or $k == 'Prev') {
    		    $html .= sprintf('<a href="%s?page=%d"><b>%s</b></a> ', $script, $v, $k);
    		} elseif ($k == $this->page) {
    		    $html .= sprintf('<b>%d</b> ', $k);
    		} else {
    		    $html .= sprintf('<a href="%s?page=%d">%d</a> ', $script, $v, $k);
    		}
    	}
    	return $html;
    }
}

?>