Explorer.php

<?php

namespace ludovicm67\Url\Explorer;

use ludovicm67\Request\Request;
use ludovicm67\Request\RequestBuilder;
use ludovicm67\Url\Explorer\Parser\DescriptionParser;
use ludovicm67\Url\Explorer\Parser\ImageParser;
use ludovicm67\Url\Explorer\Parser\TitleParser;

class Explorer {

    private $url;
    private $opts;
    private $request;
    private $results = [];

    public function __construct($url, $opts = []) {
        $this->url     = $url;
        $this->opts    = $opts;
        $this->request = Request::fetchAll(new RequestBuilder($url, $opts));
        $this->buildResults();
    }

    private function buildTitle() {
        $title = (new TitleParser($this->request->getContent()))->getResults();
        if (!empty($title)) {
            $this->results["title"] = $title;
        }
    }

    private function buildDescription() {
        if (substr($this->request->getInfo("content_type"), 0, strlen("text/")) === "text/") {
            $this->results["description"] =
                (new DescriptionParser($this->request->getContent()))->getResults();
        }
    }

    private function buildImage() {
        $img = (new ImageParser($this->request->getContent()))->getResults();

        if (!$img && substr($this->request->getInfo("content_type"), 0, strlen("image/")) === "image/") {
            $this->results["type"] = "image";
            $img = $this->request->getInfo("url");
        }

        if ($img && !filter_var($img, FILTER_VALIDATE_URL)) {
            $parse = parse_url($this->request->getInfo("url"));
            $scheme = $parse['scheme'];
            $separator = mb_substr($img, 0, 1, 'utf-8');
            $separator = ($separator === "/") ? "" : "/";
            $img = $scheme . '://' . $parse['host'] . rtrim($parse['path'], "/") . $separator . $img;
        }

        $img_size = @getimagesize($img);
        if (is_array($img_size)) {
            $this->results["img"] = [
                "url"    => $img,
                "width"  => $img_size[0],
                "height" => $img_size[1],
                "mime"   => $img_size["mime"]
            ];
        } else {
            $this->results["img"] = null;
            unset($this->results["type"]);
        }

    }

    private function buildType() {
        if (isset($this->results["type"])) {
            return;
        }
        if ($this->request->isEmpty()) {
            $this->results["type"] = "none";
        } else if (!$this->results["img"]) {
            $this->results["type"] = "basic";
        } else if ($this->results["img"]["width"] >= 400
            && $this->results["img"]["height"] >= 200) {
            $this->results["type"] = "large";
        } else {
            $this->results["type"] = "small";
        }
    }

    private function buildUrls() {
        $parsedUrl = parse_url($this->request->getInfo("url"));
        $base = ($parsedUrl && isset($parsedUrl['host']))
                ? $parsedUrl['host']
                : $this->url;

        $this->results["url"] = [
            "request" => $this->url,
            "final"   => $this->request->getInfo("url"),
            "base"    => $base,
        ];
    }

    private function buildDate() {
        $date = new \DateTime("now");
        $date->setTimezone(new \DateTimeZone("UTC"));
        $this->results["updated"] = $date->format("c");
    }

    private function buildResults() {
        $this->results["code"] = $this->request->getInfo("http_code");
        $this->results["title"] = $this->request->getInfo("url");
        $this->results["description"] = "";
        $this->results["img"] = null;
        if (!$this->request->isEmpty() && $this->request->getContent() !== "") {
            $this->buildTitle();
            $this->buildDescription();
            $this->buildImage();
        }
        $this->buildType();
        $this->buildUrls();
        $this->buildDate();
    }

    public function getUrl() {
        return $this->url;
    }

    public function getOpts() {
        return $this->opts;
    }

    public function getRequest() {
        return $this->request;
    }

    public function getResults() {
        return (object) $this->results;
    }

    public function json() {
        return json_encode($this->results,
            JSON_PRETTY_PRINT
            | JSON_UNESCAPED_SLASHES
            | JSON_UNESCAPED_UNICODE);
    }

    public function __toString() {
        return $this->json();
    }

}