Allow for avatar downloads from social networks

Signed-off-by: call-me-matt <nextcloud@matthiasheinisch.de>

1 files changed, 99 insertions, 0 deletions

diff --git a/lib/Service/Social/FacebookProvider.php b/lib/Service/Social/FacebookProvider.php
new file mode 100644
index 00000000..028b1dcc
--- /dev/null
+++ b/lib/Service/Social/FacebookProvider.php
@@ -0,0 +1,99 @@
+<?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;
+
+use OCP\Http\Client\IClientService;
+
+class FacebookProvider implements ISocialProvider {
+
+	/** @var IClientService */
+	private $httpClient;
+
+	public function __construct(IClientService $httpClient) {
+		$this->httpClient = $httpClient->NewClient();
+	}
+	
+	/**
+	 * Returns the profile-id
+	 *
+	 * @param {string} the value from the contact's x-socialprofile
+	 *
+	 * @return string
+	 */
+	public function cleanupId(string $candidate):string {
+		$candidate = basename($candidate);
+		if (!is_numeric($candidate)) {
+			$candidate = $this->findFacebookId($candidate);
+		}
+		return $candidate;
+	}
+
+	/**
+	 * Returns the profile-picture url
+	 *
+	 * @param {string} profileId the profile-id
+	 *
+	 * @return string
+	 */
+	public function getImageUrl(string $profileId):string {
+		$recipe = 'https://graph.facebook.com/{socialId}/picture?width=720';
+		$connector = str_replace("{socialId}", $profileId, $recipe);
+		return $connector;
+	}
+
+	/**
+	 * Tries to get the facebook id from facebook profile name
+	 * e. g. "zuck" --> "4"
+	 * Fallback: return profile name
+	 * (will give oauth error from facebook except if profile is public)
+	 *
+	 * @param {string} profileName the user's profile name
+	 *
+	 * @return string
+	 */
+	protected function findFacebookId(string $profileName):string {
+		try {
+			$result = $this->httpClient->get("https://facebook.com/".$profileName);
+			if ($result->getStatusCode() !== 200) {
+				return $profileName;
+			}
+			$htmlResult = new \DOMDocument();
+			$htmlResult->loadHTML($result->getBody());
+			$metas = $htmlResult->getElementsByTagName('meta');
+			foreach ($metas as $meta) {
+				foreach ($meta->attributes as $attr) {
+					$value = $attr->nodeValue;
+					if (strpos($value, "/profile/")) {
+						$value = str_replace('fb://profile/', '', $value);
+						return($value);
+					}
+				}
+			}
+			// keyword not found - page changed?
+			return $profileName;
+		} catch (\Exception $e) {
+			return $profileName;
+		}
+	}
+}