Split files_sharing middelware

Since for external shares there is no need for link shares to be enabled
we should check which controller is actually being called.

This makes sure that in all cases we verify that the files_sharing app
is enabled. But only for the share controller (public shares) we check
if the API is enabled and if links are enabled.

TODO: add checks for federated sharing as well

apps/files_sharing/lib/middleware/sharingcheckmiddleware.php

@@ -68,6 +68,13 @@ class SharingCheckMiddleware extends Middleware {
 		if(!$this->isSharingEnabled()) {
 			throw new NotFoundException('Sharing is disabled.');
 		}
+
+		if ($controller instanceof \OCA\Files_Sharing\Controllers\ExternalSharesController) {
+			//TODO: Proper checks
+		} else if ($controller instanceof \OCA\Files_Sharing\Controllers\ShareController &&
+			!$this->isLinkSharingEnabled()) {
+			throw new NotFoundException('Link sharing is disabled');
+		}
 	}
 
 	/**
@@ -98,6 +105,14 @@ class SharingCheckMiddleware extends Middleware {
 			return false;
 		}
 
+		return true;
+	}
+
+	/**
+	 * Check if link sharing is allowed
+	 * @return bool
+	 */
+	private function isLinkSharingEnabled() {
 		// Check if the shareAPI is enabled
 		if ($this->config->getAppValue('core', 'shareapi_enabled', 'yes') !== 'yes') {
 			return false;

apps/files_sharing/tests/middleware/sharingcheckmiddleware.php

@@ -51,13 +51,27 @@ class SharingCheckMiddlewareTest extends \Test\TestCase {
 		$this->sharingCheckMiddleware = new SharingCheckMiddleware('files_sharing', $this->config, $this->appManager);
 	}
 
-	public function testIsSharingEnabledWithEverythingEnabled() {
+	public function testIsSharingEnabledWithAppEnabled() {
 		$this->appManager
 			->expects($this->once())
 			->method('isEnabledForUser')
 			->with('files_sharing')
 			->will($this->returnValue(true));
 
+		$this->assertTrue(self::invokePrivate($this->sharingCheckMiddleware, 'isSharingEnabled'));
+	}
+
+	public function testIsSharingEnabledWithAppDisabled() {
+		$this->appManager
+			->expects($this->once())
+			->method('isEnabledForUser')
+			->with('files_sharing')
+			->will($this->returnValue(false));
+
+		$this->assertFalse(self::invokePrivate($this->sharingCheckMiddleware, 'isSharingEnabled'));
+	}
+
+	public function testIsLinkSharingEnabledWithEverythinEnabled() {
 		$this->config
 			->expects($this->at(0))
 			->method('getAppValue')
@@ -70,26 +84,11 @@ class SharingCheckMiddlewareTest extends \Test\TestCase {
 			->with('core', 'shareapi_allow_links', 'yes')
 			->will($this->returnValue('yes'));
 
-		$this->assertTrue(self::invokePrivate($this->sharingCheckMiddleware, 'isSharingEnabled'));
+		$this->assertTrue(self::invokePrivate($this->sharingCheckMiddleware, 'isLinkSharingEnabled'));
 	}
 
-	public function testIsSharingEnabledWithAppDisabled() {
-		$this->appManager
-			->expects($this->once())
-			->method('isEnabledForUser')
-			->with('files_sharing')
-			->will($this->returnValue(false));
-
-		$this->assertFalse(self::invokePrivate($this->sharingCheckMiddleware, 'isSharingEnabled'));
-	}
-
-	public function testIsSharingEnabledWithLinkSharingDisabled() {
-		$this->appManager
-			->expects($this->once())
-			->method('isEnabledForUser')
-			->with('files_sharing')
-			->will($this->returnValue(true));
 
+	public function testIsLinkSharingEnabledWithLinkSharingDisabled() {
 		$this->config
 			->expects($this->at(0))
 			->method('getAppValue')
@@ -102,23 +101,17 @@ class SharingCheckMiddlewareTest extends \Test\TestCase {
 			->with('core', 'shareapi_allow_links', 'yes')
 			->will($this->returnValue('no'));
 
-		$this->assertFalse(self::invokePrivate($this->sharingCheckMiddleware, 'isSharingEnabled'));
+		$this->assertFalse(self::invokePrivate($this->sharingCheckMiddleware, 'isLinkSharingEnabled'));
 	}
 
-	public function testIsSharingEnabledWithSharingAPIDisabled() {
-		$this->appManager
-			->expects($this->once())
-			->method('isEnabledForUser')
-			->with('files_sharing')
-			->will($this->returnValue(true));
-
+	public function testIsLinkSharingEnabledWithSharingAPIDisabled() {
 		$this->config
 			->expects($this->once())
 			->method('getAppValue')
 			->with('core', 'shareapi_enabled', 'yes')
 			->will($this->returnValue('no'));
 
-		$this->assertFalse(self::invokePrivate($this->sharingCheckMiddleware, 'isSharingEnabled'));
+		$this->assertFalse(self::invokePrivate($this->sharingCheckMiddleware, 'isLinkSharingEnabled'));
 	}
 
 	public function testBeforeControllerWithSharingEnabled() {
@@ -140,7 +133,10 @@ class SharingCheckMiddlewareTest extends \Test\TestCase {
 			->with('core', 'shareapi_allow_links', 'yes')
 			->will($this->returnValue('yes'));
 
-		$this->sharingCheckMiddleware->beforeController($this->controllerMock, 'myMethod');
+		$controller = $this->getMockBuilder('\OCA\Files_Sharing\Controllers\ShareController')
+			->disableOriginalConstructor()->getMock();
+
+		$this->sharingCheckMiddleware->beforeController($controller, 'myMethod');
 	}
 
 	/**
@@ -154,7 +150,10 @@ class SharingCheckMiddlewareTest extends \Test\TestCase {
 			->with('files_sharing')
 			->will($this->returnValue(false));
 
-		$this->sharingCheckMiddleware->beforeController($this->controllerMock, 'myMethod');
+		$controller = $this->getMockBuilder('\OCA\Files_Sharing\Controllers\ShareController')
+			->disableOriginalConstructor()->getMock();
+
+		$this->sharingCheckMiddleware->beforeController($controller, 'myMethod');
 	}
 
 	/**