feat: Added VTSingleLineString

Author: macmade

ValueTransformers.xcodeproj/project.pbxproj

@@ -10,6 +10,7 @@
 		05233032243CD25B005BBB8E /* ValueTransformers.h in Headers */ = {isa = PBXBuildFile; fileRef = 05233031243CD25B005BBB8E /* ValueTransformers.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		05233035243CD294005BBB8E /* PerformSelectorUnsafe.h in Headers */ = {isa = PBXBuildFile; fileRef = 05233033243CD294005BBB8E /* PerformSelectorUnsafe.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		05233036243CD294005BBB8E /* PerformSelectorUnsafe.m in Sources */ = {isa = PBXBuildFile; fileRef = 05233034243CD294005BBB8E /* PerformSelectorUnsafe.m */; };
+		058AC6302BA9E1AD001EEB04 /* SingleLineString.swift in Sources */ = {isa = PBXBuildFile; fileRef = 058AC62F2BA9E1AD001EEB04 /* SingleLineString.swift */; };
 		05D3735E20ED91E5007FE14A /* StringIsNotEmpty.swift in Sources */ = {isa = PBXBuildFile; fileRef = 05D3734320ED91E5007FE14A /* StringIsNotEmpty.swift */; };
 		05D3735F20ED91E5007FE14A /* ArrayIsEmpty.swift in Sources */ = {isa = PBXBuildFile; fileRef = 05D3734420ED91E5007FE14A /* ArrayIsEmpty.swift */; };
 		05D3736020ED91E5007FE14A /* StringIsEmpty.swift in Sources */ = {isa = PBXBuildFile; fileRef = 05D3734520ED91E5007FE14A /* StringIsEmpty.swift */; };
@@ -84,6 +85,7 @@
 		05233031243CD25B005BBB8E /* ValueTransformers.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ValueTransformers.h; sourceTree = "<group>"; };
 		05233033243CD294005BBB8E /* PerformSelectorUnsafe.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = PerformSelectorUnsafe.h; sourceTree = "<group>"; };
 		05233034243CD294005BBB8E /* PerformSelectorUnsafe.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = PerformSelectorUnsafe.m; sourceTree = "<group>"; };
+		058AC62F2BA9E1AD001EEB04 /* SingleLineString.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SingleLineString.swift; sourceTree = "<group>"; };
 		05A6D085238BF1700032EA48 /* Debug - Library.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = "Debug - Library.xcconfig"; sourceTree = "<group>"; };
 		05A6D086238BF1700032EA48 /* Release - Library.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = "Release - Library.xcconfig"; sourceTree = "<group>"; };
 		05CD4AB220ED7B2200DBDE99 /* README.md */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = net.daringfireball.markdown; path = README.md; sourceTree = "<group>"; };
@@ -270,6 +272,7 @@
 				05233034243CD294005BBB8E /* PerformSelectorUnsafe.m */,
 				EF0F53582715DB6100BE981A /* SetIsEmpty.swift */,
 				EF0F535A2715DD1900BE981A /* SetIsNotEmpty.swift */,
+				058AC62F2BA9E1AD001EEB04 /* SingleLineString.swift */,
 				05D3734520ED91E5007FE14A /* StringIsEmpty.swift */,
 				05D3734320ED91E5007FE14A /* StringIsNotEmpty.swift */,
 				05D3734E20ED91E5007FE14A /* UppercaseString.swift */,
@@ -427,6 +430,7 @@
 				05D3736920ED91E5007FE14A /* UppercaseString.swift in Sources */,
 				05D3736620ED91E5007FE14A /* BoolToDisabledTextColor.swift in Sources */,
 				05233036243CD294005BBB8E /* PerformSelectorUnsafe.m in Sources */,
+				058AC6302BA9E1AD001EEB04 /* SingleLineString.swift in Sources */,
 				05D3735E20ED91E5007FE14A /* StringIsNotEmpty.swift in Sources */,
 				05D3736720ED91E5007FE14A /* ArrayIsNotEmpty.swift in Sources */,
 				05D3736220ED91E5007FE14A /* NumberIsGreaterThanZero.swift in Sources */,

ValueTransformers/SingleLineString.swift

@@ -0,0 +1,47 @@
+/*******************************************************************************
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022, Jean-David Gadina - www.xs-labs.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the Software), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ ******************************************************************************/
+
+import Foundation
+
+@objc( VTSingleLineString )
+public class SingleLineString: ValueTransformer
+{
+    @objc
+    public override class func transformedValueClass() -> AnyClass
+    {
+        return NSString.self
+    }
+
+    @objc
+    public override class func allowsReverseTransformation() -> Bool
+    {
+        return false
+    }
+
+    @objc
+    public override func transformedValue( _ value: Any? ) -> Any?
+    {
+        ( value as? String )?.components( separatedBy: .newlines ).first
+    }
+}

ValueTransformersTests/ValueTransformersTests.m

@@ -301,4 +301,19 @@ - ( void )testVTSetIsNotEmpty
     XCTAssertTrue(  ( ( NSNumber * )[ vt transformedValue: [ NSSet setWithArray: @[ @"" ] ] ] ).boolValue, @"" );
 }
 
+- ( void )testSingleLineString
+{
+    VTSingleLineString * vt;
+
+    vt = [ VTSingleLineString new ];
+
+    XCTAssertEqual( [ VTSingleLineString transformedValueClass ], [ NSString class ], @"" );
+    XCTAssertFalse( [ VTSingleLineString allowsReverseTransformation ], @"" );
+
+    XCTAssertEqualObjects( [ vt transformedValue: nil ],                              nil,             @"" );
+    XCTAssertEqualObjects( [ vt transformedValue: @0  ],                              nil,             @"" );
+    XCTAssertEqualObjects( [ vt transformedValue: @"hello, world" ],                  @"hello, world", @"" );
+    XCTAssertEqualObjects( [ vt transformedValue: @"hello, world\nhello, universe" ], @"hello, world", @"" );
+}
+
 @end