added Mastodon

css/icons.scss

@@ -31,12 +31,13 @@
 @include icon-black-white('language', 'contacts', 2);
 @include icon-black-white('clone', 'contacts', 2);
 @include icon-black-white('sync', 'contacts', 2);
-
+	
 // social network icons:
 @include icon-black-white('Facebook', 'contacts', 2);
 @include icon-black-white('Instagram', 'contacts', 2);
-@include icon-black-white('Twitter', 'contacts', 2);
+@include icon-black-white('Mastodon', 'contacts', 2);
 @include icon-black-white('Tumblr', 'contacts', 2);
+@include icon-black-white('Twitter', 'contacts', 2);
 
 .icon-up-force-white {
 	// using #fffffe to trick the accessibility dark theme icon invert

lib/Service/Social/CompositeSocialProvider.php

@@ -32,13 +32,15 @@ class CompositeSocialProvider {
 	private $providers;
 
 	public function __construct(InstagramProvider $instagramProvider,
+					MastodonProvider $mastodonProvider,
 					FacebookProvider $facebookProvider,
 					TwitterProvider $twitterProvider,
 					TumblrProvider $tumblrProvider) {
 
 		// This determines the priority of known providers
 		$this->providers = [
 			'instagram' 	=> $instagramProvider,
+			'mastodon' 	=> $mastodonProvider,
 			'twitter' 	=> $twitterProvider,
 			'facebook'	=> $facebookProvider,
 			'tumblr'	=> $tumblrProvider,

lib/Service/Social/MastodonProvider.php

@@ -0,0 +1,95 @@
+<?php
+/**
+ * @copyright Copyright (c) 2020 Matthias Heinisch <nextcloud@matthiasheinisch.de>
+ *
+ * @author Matthias Heinisch <nextcloud@matthiasheinisch.de>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\Contacts\Service\Social;
+
+class MastodonProvider implements ISocialProvider {
+
+	public function __construct() {
+	}
+
+	/**
+	 * Returns the profile-id
+	 *
+	 * @param {string} the value from the contact's x-socialprofile
+	 *
+	 * @return string
+	 */
+	public function cleanupId(string $candidate):?string {
+		return $candidate;
+	}
+
+	/**
+	 * Returns the profile-picture url
+	 *
+	 * @param {string} profileId the profile-id
+	 *
+	 * @return string|null
+	 */
+	public function getImageUrl(string $profileId):?string {
+		try {
+			if (strpos($profileId, '@') === 0) {
+				$profile_parts = explode ('@', $profileId);
+				$profileId = 'https://' . $profile_parts[2] . '/@' . $profile_parts[1];
+			}
+			$connector = $this->getFromHtml($profileId);
+		}
+		catch (Exception $e) {
+			$connector = null;
+		}
+		return $connector;
+
+	}
+
+	/**
+	 * extracts desired value from an html page
+	 *
+	 * @param {string} url the target from where to fetch the content
+	 * @param {String} the desired catchword to filter for
+	 *
+	 * @returns {String} the extracted value (first match) or null if not present
+	 */
+	protected function getFromHtml(string $url) : ?string {
+		try {
+			$opts = [
+				"http" => [
+				"method" => "GET",
+				"header" => "User-Agent: Nextcloud Contacts App",
+				]
+			];
+			$context = stream_context_create($opts);
+			$result = file_get_contents($url, false, $context);
+
+			$htmlResult = new \DOMDocument();
+			$htmlResult->loadHTML($result);
+			$img = $htmlResult->getElementById('profile_page_avatar');
+			if (!is_null($img)) {
+				return $img->getAttribute("data-original");
+			}
+			return null;
+		}
+		catch (Exception $e) {
+			return null;
+		}
+	}
+}