init

user/plugins/pagination/classes/plugin/PaginationHelper.php

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+<?php
+namespace Grav\Plugin\Pagination;
+
+use Grav\Common\Grav;
+use Grav\Common\Iterator;
+use Grav\Common\Page\Collection;
+use Grav\Common\Uri;
+
+class PaginationHelper extends Iterator
+{
+    protected $current;
+    protected $items_per_page;
+    protected $page_count;
+
+    protected $url_params;
+
+    /**
+     * Create and initialize pagination.
+     *
+     * @param Collection $collection
+     */
+    public function __construct(Collection $collection)
+    {
+        parent::__construct();
+
+        $grav = Grav::instance();
+
+        /** @var Uri $uri */
+        $uri = $grav['uri'];
+        $config = $grav['config'];
+        $this->current = $uri->currentPage();
+
+        // get params
+        $url_params = explode('/', ltrim($uri->params(), '/'));
+
+        $params = $collection->params();
+
+        foreach ($url_params as $key => $value) {
+            if (strpos($value, 'page' . $config->get('system.param_sep')) !== false) {
+                unset($url_params[$key]);
+            }
+            if (isset($params['ignore_url_params'])) {
+                foreach ((array)$params['ignore_params'] as $ignore_param) {
+                    if (strpos($value, $ignore_param . $config->get('system.param_sep')) !== false) {
+                        unset($url_params[$key]);
+                    }
+                }
+            }
+        }
+
+        $this->url_params = '/'.implode('/', $url_params);
+
+        // check for empty params
+        if ($this->url_params === '/') {
+            $this->url_params = '';
+        }
+
+        $this->items_per_page = $params['limit'];
+        $this->page_count = ceil($collection->count() / $this->items_per_page);
+
+        for ($x=1; $x <= $this->page_count; $x++) {
+            if ($x === 1) {
+                $this->items[$x] = new PaginationPage($x, '');
+            } else {
+                $this->items[$x] = new PaginationPage($x, '/page' . $config->get('system.param_sep') . $x);
+            }
+       }
+    }
+
+    /**
+     * Returns true if current item has previous sibling.
+     *
+     * @return bool
+     */
+    public function hasPrev()
+    {
+        if (array_key_exists($this->current -1, $this->items)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Returns true if current item has next sibling.
+     *
+     * @return bool
+     */
+    public function hasNext()
+    {
+        if (array_key_exists($this->current +1, $this->items)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Return previous url.
+     *
+     * @return string|null
+     */
+    public function prevUrl()
+    {
+        if (array_key_exists($this->current -1, $this->items)) {
+            return $this->items[$this->current -1]->url;
+        }
+
+        return null;
+    }
+
+    /**
+     * Return next url.
+     *
+     * @return string|null
+     */
+    public function nextUrl()
+    {
+        if (array_key_exists($this->current +1, $this->items)) {
+            return $this->items[$this->current +1]->url;
+        }
+
+        return null;
+    }
+
+    public function params()
+    {
+        return $this->url_params;
+    }
+}