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package de.pixart.messenger.utils;
import android.os.AsyncTask;
import android.webkit.URLUtil;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import io.github.ponnamkarthik.richlinkpreview.MetaData;
import io.github.ponnamkarthik.richlinkpreview.ResponseListener;
/**
* Created by ponna on 16-01-2018.
*/
public class RichPreview {
MetaData metaData;
ResponseListener responseListener;
String url;
public RichPreview(ResponseListener responseListener) {
this.responseListener = responseListener;
metaData = new MetaData();
}
public void getPreview(String url) {
this.url = url;
new RichPreview.getData().execute();
}
private class getData extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
Document doc = null;
try {
doc = Jsoup.connect(url)
.timeout(30 * 1000)
.get();
Elements elements = doc.getElementsByTag("meta");
// getTitle doc.select("meta[property=og:title]")
String title = doc.select("meta[property=og:title]").attr("content");
if (title == null || title.isEmpty()) {
title = doc.title();
}
metaData.setTitle(title);
//getDescription
String description = doc.select("meta[name=description]").attr("content");
if (description.isEmpty() || description == null) {
description = doc.select("meta[name=Description]").attr("content");
}
if (description.isEmpty() || description == null) {
description = doc.select("meta[property=og:description]").attr("content");
}
if (description.isEmpty() || description == null) {
description = "";
}
metaData.setDescription(description);
// getMediaType
Elements mediaTypes = doc.select("meta[name=medium]");
String type = "";
if (mediaTypes.size() > 0) {
String media = mediaTypes.attr("content");
type = media.equals("image") ? "photo" : media;
} else {
type = doc.select("meta[property=og:type]").attr("content");
}
metaData.setMediatype(type);
//getImages
Elements imageElements = doc.select("meta[property=og:image]");
if (imageElements.size() > 0) {
String image = imageElements.attr("content");
if (!image.isEmpty()) {
metaData.setImageurl(resolveURL(url, image));
}
}
if (metaData.getImageurl().isEmpty()) {
String src = doc.select("link[rel=image_src]").attr("href");
if (!src.isEmpty()) {
metaData.setImageurl(resolveURL(url, src));
} else {
src = doc.select("link[rel=apple-touch-icon]").attr("href");
if (!src.isEmpty()) {
metaData.setImageurl(resolveURL(url, src));
metaData.setFavicon(resolveURL(url, src));
} else {
src = doc.select("link[rel=icon]").attr("href");
if (!src.isEmpty()) {
metaData.setImageurl(resolveURL(url, src));
metaData.setFavicon(resolveURL(url, src));
}
}
}
}
//Favicon
String src = doc.select("link[rel=apple-touch-icon]").attr("href");
if (!src.isEmpty()) {
metaData.setFavicon(resolveURL(url, src));
} else {
src = doc.select("link[rel=icon]").attr("href");
if (!src.isEmpty()) {
metaData.setFavicon(resolveURL(url, src));
}
}
for (Element element : elements) {
if (element.hasAttr("property")) {
String str_property = element.attr("property").toString().trim();
if (str_property.equals("og:url")) {
metaData.setUrl(element.attr("content").toString());
}
if (str_property.equals("og:site_name")) {
metaData.setSitename(element.attr("content").toString());
}
}
}
if (metaData.getUrl().equals("") || metaData.getUrl().isEmpty()) {
URI uri = null;
try {
uri = new URI(url);
} catch (URISyntaxException e) {
e.printStackTrace();
}
if (url == null) {
metaData.setUrl(url);
} else {
metaData.setUrl(uri != null ? uri.getHost() : null);
}
}
} catch (IOException e) {
e.printStackTrace();
responseListener.onError(new Exception("No Html Received from " + url + " Check your Internet " + e.getLocalizedMessage()));
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
responseListener.onData(metaData);
}
}
private String resolveURL(String url, String part) {
if (URLUtil.isValidUrl(part)) {
return part;
} else {
URI base_uri = null;
try {
base_uri = new URI(url);
} catch (URISyntaxException e) {
e.printStackTrace();
}
base_uri = base_uri != null ? base_uri.resolve(part) : null;
return base_uri != null ? base_uri.toString() : null;
}
}
}
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