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708 lines
18 KiB
708 lines
18 KiB
7 years ago
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<?php
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/**
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* Part of the Fuel framework.
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*
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* @package Fuel
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* @version 1.8
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* @author Fuel Development Team
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* @license MIT License
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* @copyright 2010 - 2016 Fuel Development Team
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* @link http://fuelphp.com
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*/
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namespace Fuel\Core;
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class Pagination
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{
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/**
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* @var array Pagination instances
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*/
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protected static $_instances = array();
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/**
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* @var array Pagination default instance
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*/
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protected static $_instance = null;
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/**
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* Init
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*
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* Loads in the config and sets the variables
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*
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* @return void
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*/
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public static function _init()
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{
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\Config::load('pagination', true);
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\Lang::load('pagination', true);
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}
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/**
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* Static access to the default instance
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*
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* @param string $name
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* @param array $arguments
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* @return mixed
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* @throws \BadMethodCallException if the request method does not exist
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*/
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public static function __callStatic($name, $arguments)
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{
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// old pre-1.4 mapping to new instance methods
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static $mapping = array(
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'get' => '__get',
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'set' => '__set',
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'set_config' => '__set',
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'create_links' => 'render',
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'page_links' => 'pages_render',
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'prev_link' => 'previous',
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'next_link' => 'next',
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);
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array_key_exists($name, $mapping) and $name = $mapping[$name];
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// call the method on the default instance
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if ($instance = static::instance() and method_exists($instance, $name))
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{
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return call_fuel_func_array(array($instance, $name), $arguments);
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}
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throw new \BadMethodCallException('The pagination class doesn\'t have a method called "'.$name.'"');
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}
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/**
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* forge a new pagination instance
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*
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* @param string $name
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* @param array $config
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* @return \Pagination a new pagination instance
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*/
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public static function forge($name = 'default', $config = array())
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{
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if ($exists = static::instance($name))
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{
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\Errorhandler::notice('Pagination with this name exists already, cannot be overwritten.');
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return $exists;
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}
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static::$_instances[$name] = new static($config);
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if ($name == 'default')
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{
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static::$_instance = static::$_instances[$name];
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}
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return static::$_instances[$name];
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}
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/**
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* retrieve an existing pagination instance
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*
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* @param string $name
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* @return \Pagination a existing pagination instance
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*/
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public static function instance($name = null)
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{
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if ($name !== null)
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{
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if ( ! array_key_exists($name, static::$_instances))
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{
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return false;
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}
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return static::$_instances[$name];
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}
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if (static::$_instance === null)
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{
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static::$_instance = static::forge();
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}
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return static::$_instance;
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}
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// --------------------------------------------------------------------
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/**
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* instance configuration values
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*/
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protected $config = array(
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'current_page' => null,
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'offset' => 0,
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'per_page' => 10,
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'total_pages' => 0,
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'total_items' => 0,
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'num_links' => 5,
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'uri_segment' => 3,
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'show_first' => false,
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'show_last' => false,
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'pagination_url' => null,
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'link_offset' => 0.5,
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);
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/**
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* instance template values
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*/
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protected $template = array(
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'wrapper' => "<div class=\"pagination\">\n\t{pagination}\n</div>\n",
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'first' => "<span class=\"first\">\n\t{link}\n</span>\n",
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'first-marker' => "««",
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'first-link' => "\t\t<a href=\"{uri}\">{page}</a>\n",
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'first-inactive' => "",
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'first-inactive-link' => "",
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'previous' => "<span class=\"previous\">\n\t{link}\n</span>\n",
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'previous-marker' => "«",
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'previous-link' => "\t\t<a href=\"{uri}\">{page}</a>\n",
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'previous-inactive' => "<span class=\"previous-inactive\">\n\t{link}\n</span>\n",
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'previous-inactive-link' => "\t\t<a href=\"#\">{page}</a>\n",
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'regular' => "<span>\n\t{link}\n</span>\n",
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'regular-link' => "\t\t<a href=\"{uri}\">{page}</a>\n",
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'active' => "<span class=\"active\">\n\t{link}\n</span>\n",
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'active-link' => "\t\t<a href=\"#\">{page}</a>\n",
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'next' => "<span class=\"next\">\n\t{link}\n</span>\n",
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'next-marker' => "»",
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'next-link' => "\t\t<a href=\"{uri}\">{page}</a>\n",
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'next-inactive' => "<span class=\"next-inactive\">\n\t{link}\n</span>\n",
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'next-inactive-link' => "\t\t<a href=\"#\">{page}</a>\n",
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'last' => "<span class=\"next\">\n\t{link}\n</span>\n",
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'last-marker' => "»»",
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'last-link' => "\t\t<a href=\"{uri}\">{page}</a>\n",
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'last-inactive' => "",
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'last-inactive-link' => "",
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);
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/**
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* raw pagination results
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*/
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protected $raw_results = array();
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/**
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* @param array $config
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*/
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public function __construct($config = array())
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{
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// make sure config is an array
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is_array($config) or $config = array('name' => $config);
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// and we have a template name
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array_key_exists('name', $config) or $config['name'] = \Config::get('pagination.active', 'default');
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// merge the config passed with the defined configuration
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$config = array_merge(\Config::get('pagination.'.$config['name'], array()), $config);
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// don't need the template name anymore
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unset($config['name']);
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// update the instance default config with the data passed
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foreach ($config as $key => $value)
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{
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$this->__set($key, $value);
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}
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}
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/**
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* configuration value getter
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* @param $name
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* @return mixed
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*/
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public function __get($name)
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{
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// use the calculated page if no current_page is passed
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if ($name === 'current_page' and $this->config[$name] === null)
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{
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$name = 'calculated_page';
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}
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if (array_key_exists($name, $this->config))
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{
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return $this->config[$name];
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}
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elseif (array_key_exists($name, $this->template))
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{
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return $this->template[$name];
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}
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else
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{
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return null;
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}
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}
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/**
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* configuration value setter
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*
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* @param $name
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* @param mixed $value
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*/
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public function __set($name, $value = null)
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{
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if (is_array($name))
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{
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foreach($name as $key => $value)
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{
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$this->__set($key, $value);
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}
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}
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else
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{
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$value = $this->_validate($name, $value);
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if (array_key_exists($name, $this->config))
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{
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$this->config[$name] = $value;
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}
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elseif (array_key_exists($name, $this->template))
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{
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$this->template[$name] = $value;
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}
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}
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// update the page counters
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$this->_recalculate();
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}
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/**
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* Render the pagination when the object is cast to string
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*/
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public function __toString()
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{
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return $this->render();
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}
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/**
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* Creates the pagination markup
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*
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* @param mixed $raw
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* @return mixed HTML Markup for page number links, or an array of raw pagination data
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*/
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public function render($raw = false)
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{
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// no links if we only have one page
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if ($this->config['total_pages'] == 1)
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{
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return $raw ? array() : '';
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}
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$this->raw_results = array();
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$html = str_replace(
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'{pagination}',
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$this->first().$this->previous().$this->pages_render().$this->next().$this->last(),
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$this->template['wrapper']
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);
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return $raw ? $this->raw_results : $html;
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}
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/**
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* generate the HTML for the page links only
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*
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* @return string Markup for the pagination block
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*/
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public function pages_render()
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{
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// no links if we only have one page
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if ($this->config['total_pages'] == 1)
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{
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return '';
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}
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$html = '';
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// calculate start- and end page numbers
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$start = $this->config['calculated_page'] - floor($this->config['num_links'] * $this->config['link_offset']);
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$end = $this->config['calculated_page'] + floor($this->config['num_links'] * ( 1 - $this->config['link_offset']));
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// adjust for the first few pages
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if ($start < 1)
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{
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$end -= $start - 1;
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$start = 1;
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}
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// make sure we don't overshoot the current page due to rounding issues
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if ($end < $this->config['calculated_page'])
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{
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$start++;
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$end++;
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}
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// make sure we don't overshoot the total
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if ($end > $this->config['total_pages'])
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{
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$start = max(1, $start - $end + $this->config['total_pages']);
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$end = $this->config['total_pages'];
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}
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for($i = intval($start); $i <= intval($end); $i++)
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{
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if ($this->config['calculated_page'] == $i)
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{
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$html .= str_replace(
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'{link}',
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str_replace(array('{uri}', '{page}'), array('#', $i), $this->template['active-link']),
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$this->template['active']
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);
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$this->raw_results[] = array('uri' => '#', 'title' => $i, 'type' => 'active');
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}
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else
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{
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$html .= str_replace(
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'{link}',
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str_replace(array('{uri}', '{page}'), array($this->_make_link($i), $i), $this->template['regular-link']),
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$this->template['regular']
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);
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$this->raw_results[] = array('uri' => $this->_make_link($i), 'title' => $i, 'type' => 'regular');
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}
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}
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return $html;
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}
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/**
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* Pagination "First" link
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*
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* @param string $marker optional text to display in the link
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* @return string Markup for the 'first' page number link
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*/
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public function first($marker = null)
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{
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$html = '';
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$marker === null and $marker = $this->template['first-marker'];
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if ($this->config['show_first'])
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{
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if ($this->config['total_pages'] > 1 and $this->config['calculated_page'] > 1)
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{
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$html = str_replace(
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'{link}',
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str_replace(array('{uri}', '{page}'), array($this->_make_link(1), $marker), $this->template['first-link']),
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$this->template['first']
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);
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$this->raw_results['first'] = array('uri' => $this->_make_link(1), 'title' => $marker, 'type' => 'first');
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}
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else
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{
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$html = str_replace(
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'{link}',
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str_replace(array('{uri}', '{page}'), array('#', $marker), $this->template['first-inactive-link']),
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$this->template['first-inactive']
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);
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$this->raw_results['first'] = array('uri' => '#', 'title' => $marker, 'type' => 'first-inactive');
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}
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}
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return $html;
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}
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/**
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||
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* Pagination "Previous" link
|
||
|
|
*
|
||
|
|
* @param string $marker optional text to display in the link
|
||
|
|
* @return string Markup for the 'previous' page number link
|
||
|
|
*/
|
||
|
|
public function previous($marker = null)
|
||
|
|
{
|
||
|
|
$html = '';
|
||
|
|
|
||
|
|
$marker === null and $marker = $this->template['previous-marker'];
|
||
|
|
|
||
|
|
if ($this->config['total_pages'] > 1)
|
||
|
|
{
|
||
|
|
if ($this->config['calculated_page'] == 1)
|
||
|
|
{
|
||
|
|
$html = str_replace(
|
||
|
|
'{link}',
|
||
|
|
str_replace(array('{uri}', '{page}'), array('#', $marker), $this->template['previous-inactive-link']),
|
||
|
|
$this->template['previous-inactive']
|
||
|
|
);
|
||
|
|
$this->raw_results['previous'] = array('uri' => '#', 'title' => $marker, 'type' => 'previous-inactive');
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$previous_page = $this->config['calculated_page'] - 1;
|
||
|
|
$previous_page = ($previous_page == 1) ? '' : $previous_page;
|
||
|
|
|
||
|
|
$html = str_replace(
|
||
|
|
'{link}',
|
||
|
|
str_replace(array('{uri}', '{page}'), array($this->_make_link($previous_page), $marker), $this->template['previous-link']),
|
||
|
|
$this->template['previous']
|
||
|
|
);
|
||
|
|
$this->raw_results['previous'] = array('uri' => $this->_make_link($previous_page), 'title' => $marker, 'type' => 'previous');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $html;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Pagination "Next" link
|
||
|
|
*
|
||
|
|
* @param string $marker optional text to display in the link
|
||
|
|
* @return string Markup for the 'next' page number link
|
||
|
|
*/
|
||
|
|
public function next($marker = null)
|
||
|
|
{
|
||
|
|
$html = '';
|
||
|
|
|
||
|
|
$marker === null and $marker = $this->template['next-marker'];
|
||
|
|
|
||
|
|
if ($this->config['total_pages'] > 1)
|
||
|
|
{
|
||
|
|
if ($this->config['calculated_page'] == $this->config['total_pages'])
|
||
|
|
{
|
||
|
|
$html = str_replace(
|
||
|
|
'{link}',
|
||
|
|
str_replace(array('{uri}', '{page}'), array('#', $marker), $this->template['next-inactive-link']),
|
||
|
|
$this->template['next-inactive']
|
||
|
|
);
|
||
|
|
$this->raw_results['next'] = array('uri' => '#', 'title' => $marker, 'type' => 'next-inactive');
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$next_page = $this->config['calculated_page'] + 1;
|
||
|
|
|
||
|
|
$html = str_replace(
|
||
|
|
'{link}',
|
||
|
|
str_replace(array('{uri}', '{page}'), array($this->_make_link($next_page), $marker), $this->template['next-link']),
|
||
|
|
$this->template['next']
|
||
|
|
);
|
||
|
|
$this->raw_results['next'] = array('uri' => $this->_make_link($next_page), 'title' => $marker, 'type' => 'next');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $html;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Pagination "Last" link
|
||
|
|
*
|
||
|
|
* @param string $marker optional text to display in the link
|
||
|
|
* @return string Markup for the 'last' page number link
|
||
|
|
*/
|
||
|
|
public function last($marker = null)
|
||
|
|
{
|
||
|
|
$html = '';
|
||
|
|
|
||
|
|
$marker === null and $marker = $this->template['last-marker'];
|
||
|
|
|
||
|
|
if ($this->config['show_last'])
|
||
|
|
{
|
||
|
|
if ($this->config['total_pages'] > 1 and $this->config['calculated_page'] != $this->config['total_pages'])
|
||
|
|
{
|
||
|
|
$html = str_replace(
|
||
|
|
'{link}',
|
||
|
|
str_replace(array('{uri}', '{page}'), array($this->_make_link($this->config['total_pages']), $marker), $this->template['last-link']),
|
||
|
|
$this->template['last']
|
||
|
|
);
|
||
|
|
$this->raw_results['last'] = array('uri' => $this->_make_link($this->config['total_pages']), 'title' => $marker, 'type' => 'last');
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$html = str_replace(
|
||
|
|
'{link}',
|
||
|
|
str_replace(array('{uri}', '{page}'), array('#', $marker), $this->template['last-inactive-link']),
|
||
|
|
$this->template['last-inactive']
|
||
|
|
);
|
||
|
|
$this->raw_results['last'] = array('uri' => '#', 'title' => $marker, 'type' => 'last-inactive');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $html;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Prepares vars for creating links
|
||
|
|
*/
|
||
|
|
protected function _recalculate()
|
||
|
|
{
|
||
|
|
// get the current page number, either from the one set, or from the URI or the query string
|
||
|
|
if ($this->config['current_page'])
|
||
|
|
{
|
||
|
|
$this->config['calculated_page'] = $this->config['current_page'];
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (is_string($this->config['uri_segment']))
|
||
|
|
{
|
||
|
|
$this->config['calculated_page'] = \Input::get($this->config['uri_segment'], 1);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$this->config['calculated_page'] = (int) \Request::main()->uri->get_segment($this->config['uri_segment'], 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// do we have the total number of items?
|
||
|
|
if ($this->config['total_items'] > 0)
|
||
|
|
{
|
||
|
|
// calculate the number of pages
|
||
|
|
$this->config['total_pages'] = (int) ceil($this->config['total_items'] / $this->config['per_page']) ?: 1;
|
||
|
|
|
||
|
|
// make sure the current page is within bounds
|
||
|
|
if ($this->config['calculated_page'] > $this->config['total_pages'])
|
||
|
|
{
|
||
|
|
$this->config['calculated_page'] = $this->config['total_pages'];
|
||
|
|
}
|
||
|
|
elseif ($this->config['calculated_page'] < 1)
|
||
|
|
{
|
||
|
|
$this->config['calculated_page'] = 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// the current page must be zero based so that the offset for page 1 is 0.
|
||
|
|
$this->config['offset'] = ($this->config['calculated_page'] - 1) * $this->config['per_page'];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Generate a pagination link
|
||
|
|
*/
|
||
|
|
protected function _make_link($page)
|
||
|
|
{
|
||
|
|
// make sure we have a valid page number
|
||
|
|
empty($page) and $page = 1;
|
||
|
|
|
||
|
|
// construct a pagination url if we don't have one
|
||
|
|
if (is_null($this->config['pagination_url']))
|
||
|
|
{
|
||
|
|
// start with the main uri
|
||
|
|
$this->config['pagination_url'] = \Uri::main();
|
||
|
|
\Input::get() and $this->config['pagination_url'] .= '?'.http_build_query(\Input::get());
|
||
|
|
}
|
||
|
|
|
||
|
|
// was a placeholder defined in the url?
|
||
|
|
if (strpos($this->config['pagination_url'], '{page}') === false)
|
||
|
|
{
|
||
|
|
// break the url in bits so we can insert it
|
||
|
|
$url = parse_url($this->config['pagination_url']);
|
||
|
|
|
||
|
|
// parse the query string
|
||
|
|
if (isset($url['query']))
|
||
|
|
{
|
||
|
|
parse_str($url['query'], $url['query']);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$url['query'] = array();
|
||
|
|
}
|
||
|
|
|
||
|
|
// make sure we don't destroy any fragments
|
||
|
|
if (isset($url['fragment']))
|
||
|
|
{
|
||
|
|
$url['fragment'] = '#'.$url['fragment'];
|
||
|
|
}
|
||
|
|
|
||
|
|
// do we have a segment offset due to the base_url containing segments?
|
||
|
|
$seg_offset = parse_url(rtrim(\Uri::base(), '/'));
|
||
|
|
$seg_offset = empty($seg_offset['path']) ? 0 : count(explode('/', trim($seg_offset['path'], '/')));
|
||
|
|
|
||
|
|
// is the page number a URI segment?
|
||
|
|
if (is_numeric($this->config['uri_segment']))
|
||
|
|
{
|
||
|
|
// get the URL segments
|
||
|
|
$segs = isset($url['path']) ? explode('/', trim($url['path'], '/')) : array();
|
||
|
|
|
||
|
|
// do we have enough segments to insert? we can't fill in any blanks...
|
||
|
|
if (count($segs) < $this->config['uri_segment'] - 1)
|
||
|
|
{
|
||
|
|
throw new \RuntimeException("Not enough segments in the URI, impossible to insert the page number");
|
||
|
|
}
|
||
|
|
|
||
|
|
// replace the selected segment with the page placeholder
|
||
|
|
$segs[$this->config['uri_segment'] - 1 + $seg_offset] = '{page}';
|
||
|
|
$url['path'] = '/'.implode('/', $segs);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// add our placeholder
|
||
|
|
$url['query'][$this->config['uri_segment']] = '{page}';
|
||
|
|
}
|
||
|
|
|
||
|
|
// re-assemble the url
|
||
|
|
$query = empty($url['query']) ? '' : '?'.preg_replace('/%7Bpage%7D/', '{page}', http_build_query($url['query'], '', '&'));
|
||
|
|
unset($url['query']);
|
||
|
|
empty($url['scheme']) or $url['scheme'] .= '://';
|
||
|
|
empty($url['port']) or $url['host'] .= ':';
|
||
|
|
$this->config['pagination_url'] = implode($url).$query;
|
||
|
|
}
|
||
|
|
|
||
|
|
// return the page link
|
||
|
|
return str_replace('{page}', $page, $this->config['pagination_url']);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Validate the input configuration
|
||
|
|
*
|
||
|
|
* @param $name
|
||
|
|
* @param $value
|
||
|
|
* @return int|mixed
|
||
|
|
*/
|
||
|
|
protected function _validate($name, $value)
|
||
|
|
{
|
||
|
|
switch ($name)
|
||
|
|
{
|
||
|
|
case 'offset':
|
||
|
|
case 'total_items':
|
||
|
|
// make sure it's an integer
|
||
|
|
if ($value != intval($value))
|
||
|
|
{
|
||
|
|
$value = 0;
|
||
|
|
}
|
||
|
|
// and that it's within bounds
|
||
|
|
$value = max(0, $value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
// integer or string
|
||
|
|
case 'uri_segment':
|
||
|
|
if (is_numeric($value))
|
||
|
|
{
|
||
|
|
// make sure it's an integer
|
||
|
|
if ($value != intval($value))
|
||
|
|
{
|
||
|
|
$value = 1;
|
||
|
|
}
|
||
|
|
// and that it's within bounds
|
||
|
|
$value = max(1, $value);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
// validate integer values
|
||
|
|
case 'current_page':
|
||
|
|
case 'per_page':
|
||
|
|
case 'limit':
|
||
|
|
case 'total_pages':
|
||
|
|
case 'num_links':
|
||
|
|
// make sure it's an integer
|
||
|
|
if ($value != intval($value))
|
||
|
|
{
|
||
|
|
$value = 1;
|
||
|
|
}
|
||
|
|
// and that it's within bounds
|
||
|
|
$value = max(1, $value);
|
||
|
|
break;
|
||
|
|
|
||
|
|
// validate booleans
|
||
|
|
case 'show_first':
|
||
|
|
case 'show_last':
|
||
|
|
if ( ! is_bool($value))
|
||
|
|
{
|
||
|
|
$value = (bool) $value;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
// validate the link offset, and adjust if needed
|
||
|
|
case 'link_offset':
|
||
|
|
// make sure we have a fraction between 0 and 1
|
||
|
|
if ($value > 1)
|
||
|
|
{
|
||
|
|
$value = $value / 100;
|
||
|
|
}
|
||
|
|
|
||
|
|
// and that it's within bounds
|
||
|
|
$value = max(0.01, min($value, 0.99));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $value;
|
||
|
|
}
|
||
|
|
}
|