Allow login by email address

apps/dav/lib/connector/sabre/principal.php

@@ -196,6 +196,14 @@ function searchPrincipals($prefixPath, array $searchProperties, $test = 'allof')
 	 * @return string
 	 */
 	function findByUri($uri, $principalPrefix) {
+		if (substr($uri, 0, 7) === 'mailto:') {
+			$email = substr($uri, 7);
+			$users = $this->userManager->getByEmail($email);
+			if (count($users) === 1) {
+				return $this->principalPrefix . '/' . $users[0]->getUID();
+			}
+		}
+
 		return '';
 	}
 

apps/dav/lib/server.php

@@ -84,6 +84,9 @@ public function __construct(IRequest $request, $baseUri) {
 
 		// acl
 		$acl = new DavAclPlugin();
+		$acl->principalCollectionSet = [
+			'principals/users', 'principals/groups'
+		];
 		$acl->defaultUsernamePath = 'principals/users';
 		$this->server->addPlugin($acl);
 

apps/dav/tests/unit/connector/sabre/principal.php

@@ -255,4 +255,19 @@ public function testUpdatePrincipal() {
 	public function testSearchPrincipals() {
 		$this->assertSame([], $this->connector->searchPrincipals('principals/users', []));
 	}
+
+	public function testFindByUri() {
+		$fooUser = $this->getMockBuilder('\OC\User\User')
+			->disableOriginalConstructor()->getMock();
+		$fooUser
+			->expects($this->exactly(1))
+			->method('getUID')
+			->will($this->returnValue('foo'));
+
+		$this->userManager->expects($this->once())->method('getByEmail')->willReturn([
+			$fooUser
+		]);
+		$ret = $this->connector->findByUri('mailto:foo@bar.net', 'principals/users');
+		$this->assertSame('principals/users/foo', $ret);
+	}
 }

core/templates/login.php

@@ -40,11 +40,11 @@
 		</div>
 		<p class="grouptop">
 			<input type="text" name="user" id="user"
-				placeholder="<?php p($l->t('Username')); ?>"
+				placeholder="<?php p($l->t('Username or email')); ?>"
 				value="<?php p($_['loginName']); ?>"
 				<?php p($_['user_autofocus'] ? 'autofocus' : ''); ?>
 				autocomplete="on" autocapitalize="off" autocorrect="off" required>
-			<label for="user" class="infield"><?php p($l->t('Username')); ?></label>
+			<label for="user" class="infield"><?php p($l->t('Username or email')); ?></label>
 		</p>
 
 		<p class="groupbottom">

lib/private/legacy/user.php

@@ -152,14 +152,22 @@ public static function setupBackends() {
 	/**
 	 * Try to login a user
 	 *
-	 * @param string $loginname The login name of the user to log in
+	 * @param string $loginName The login name of the user to log in
 	 * @param string $password The password of the user
 	 * @return boolean|null
 	 *
 	 * Log in a user and regenerate a new session - if the password is ok
 	 */
-	public static function login($loginname, $password) {
-		$result = self::getUserSession()->login($loginname, $password);
+	public static function login($loginName, $password) {
+
+		$result = self::getUserSession()->login($loginName, $password);
+		if (!$result) {
+			$users = \OC::$server->getUserManager()->getByEmail($loginName);
+			// we only allow login by email if unique
+			if (count($users) === 1) {
+				$result = self::getUserSession()->login($users[0]->getUID(), $password);
+			}
+		}
 		if ($result) {
 			// Refresh the token
 			\OC::$server->getCsrfTokenManager()->refreshToken();

lib/private/user/manager.php

@@ -33,6 +33,7 @@
 namespace OC\User;
 
 use OC\Hooks\PublicEmitter;
+use OCP\IUser;
 use OCP\IUserBackend;
 use OCP\IUserManager;
 use OCP\IConfig;
@@ -354,4 +355,17 @@ public function callForAllUsers(\Closure $callback, $search = '') {
 			} while (count($users) >= $limit);
 		}
 	}
+
+	/**
+	 * @param string $email
+	 * @return IUser[]
+	 * @since 9.1.0
+	 */
+	public function getByEmail($email) {
+		$userIds = $this->config->getUsersForUserValue('settings', 'email', $email);
+
+		return array_map(function($uid) {
+			return $this->get($uid);
+		}, $userIds);
+	}
 }

lib/public/iusermanager.php

@@ -142,4 +142,11 @@ public function countUsers();
 	 * @since 9.0.0
 	 */
 	public function callForAllUsers (\Closure $callback, $search = '');
+
+	/**
+	 * @param string $email
+	 * @return IUser[]
+	 * @since 9.1.0
+	 */
+	public function getByEmail($email);
 }