instagram.php

<?php
namespace Grav\Plugin;

use Grav\Common\Plugin;
use Grav\Common\Data\Data;
use Grav\Common\Page\Page;
use Grav\Common\GPM\Response;

class InstagramPlugin extends Plugin
{
    private $template_html = 'partials/instagram.html.twig';
    private $template_vars = [];
    private $cache;
    const HOUR_IN_SECONDS = 3600;

    /**
     * Return a list of subscribed events.
     *
     * @return array    The list of events of the plugin of the form
     *                      'name' => ['method_name', priority].
     */
    public static function getSubscribedEvents() {
        return [
            'onPluginsInitialized' => ['onPluginsInitialized', 0],
        ];
    }

    /**
     * Initialize configuration.
     */
    public function onPluginsInitialized()
    {
        $this->enable([
            'onTwigTemplatePaths' => ['onTwigTemplatePaths', 0],
            'onTwigInitialized' => ['onTwigInitialized', 0]
        ]);
    }

    /**
     * Add Twig Extensions.
     */
    public function onTwigInitialized()
    {
        $this->grav['twig']->twig->addFunction(new \Twig_SimpleFunction('instagram_feed', [$this, 'getFeed']));
    }

    /**
     * Add current directory to twig lookup paths.
     */
    public function onTwigTemplatePaths()
    {
        $this->grav['twig']->twig_paths[] = __DIR__ . '/templates';
    }

    /**
     * @return array
     */
    public function getFeed($params = [])
    {
        /** @var Page $page */
        $page = $this->grav['page'];
        /** @var Twig $twig */
        $twig = $this->grav['twig'];
        /** @var Data $config */
        $config = $this->mergeConfig($page, TRUE);

        // Autoload composer components
        require __DIR__ . '/vendor/autoload.php';

        // Set up cache settings
        $cache_config = array(
            "storage"   =>  "files",
            "default_chmod" => 0777,
            "fallback" => "files",
            "securityKey" => "auto",
            "htaccess" => true,
            "path" => __DIR__ . "/cache"
        );

        // Init the cache engine
        $this->cache = phpFastCache("files", $cache_config);

        // Generate API url
        $url = 'https://api.instagram.com/v1/users/self/media/recent/?access_token=' . $config->get('feed_parameters.access_token').'&count=' . $config->get('feed_parameters.count');

        // Get the cached results if available
        $results = $this->cache->get($url);

        // Get the results from the live API, cached version not found
        if ($results === null) {
            $results = Response::get($url);

            // Cache the results
            $this->cache->set($url, $results, InstagramPlugin::HOUR_IN_SECONDS * $config->get('feed_parameters.cache_time')); // Convert hours to seconds
        }

        $this->parseResponse($results);

        $this->template_vars = [
            'user_id'   => $config->get('feed_parameters.user_id'),
            'client_id' => $config->get('feed_parameters.client_id'),
            'feed'      => $this->feeds,
            'count'     => $config->get('feed_parameters.count'),
            'params'    => $params
        ];

        $output = $this->grav['twig']->twig()->render($this->template_html, $this->template_vars);

        return $output;
    }

    private function addFeed($result) {
        foreach ($result as $key => $val) {
            if (!isset($this->feeds[$key])) {
                $this->feeds[$key] = $val;
            }
        }
        krsort($this->feeds);
    }

    private function parseResponse($json) {
        $r = array();
        $content = json_decode($json, true);
        if (count($content['data'])) {
            foreach ($content['data'] as $key => $val) {
                $created_at = $val['created_time'];
                $r[$created_at]['time'] = $created_at;
                $r[$created_at]['text'] = $val['caption']['text'];
                $r[$created_at]['image'] = $val['images']['standard_resolution']['url'];
                $r[$created_at]['image_width'] = $val['images']['standard_resolution']['width'];
                $r[$created_at]['thumb'] = $val['images']['low_resolution']['url'];
                $r[$created_at]['thumb_width'] = $val['images']['low_resolution']['width'];
                $r[$created_at]['micro'] = $val['images']['thumbnail']['url'];
                $r[$created_at]['micro_width'] = $val['images']['thumbnail']['width'];
                $r[$created_at]['user'] = $val['user']['full_name'];
                $r[$created_at]['link'] = $val['link'];
                $r[$created_at]['comments'] = $val['comments']['count'];
                $r[$created_at]['likes'] = $val['likes']['count'];
                $r[$created_at]['type'] = $val['type'];
            }
            $this->addFeed($r);
        }
    }
}