Add Rx string limiting extensions

Author: mayasaxena

Podfile.lock

@@ -20,4 +20,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: d81cbe2f98140887848195204b8b667819be7198
 
-COCOAPODS: 1.3.1
+COCOAPODS: 1.4.0

SwiftWisdom.xcodeproj/project.pbxproj

@@ -100,6 +100,8 @@
 		80D63D241C4F231C00C88D00 /* Synchronize.swift in Sources */ = {isa = PBXBuildFile; fileRef = 80D63D231C4F231C00C88D00 /* Synchronize.swift */; };
 		80D63D261C4F236F00C88D00 /* Not.swift in Sources */ = {isa = PBXBuildFile; fileRef = 80D63D251C4F236F00C88D00 /* Not.swift */; };
 		80D63D2F1C4F251E00C88D00 /* UnsignedInteger+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 80D63D2C1C4F251E00C88D00 /* UnsignedInteger+Extensions.swift */; };
+		A53A4EE71EEF330100CC53C6 /* Rx+String.swift in Sources */ = {isa = PBXBuildFile; fileRef = A53A4EE61EEF330100CC53C6 /* Rx+String.swift */; };
+		A53A4EE91EF01F8000CC53C6 /* String+Trimmed.swift in Sources */ = {isa = PBXBuildFile; fileRef = A53A4EE81EF01F8000CC53C6 /* String+Trimmed.swift */; };
 		CD16463F1CC16A410049BBD5 /* UILabel+Typography.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD16463E1CC16A410049BBD5 /* UILabel+Typography.swift */; };
 		CDCDE2561E67A6EC007B3784 /* ResultTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = CDCDE2551E67A6EC007B3784 /* ResultTests.swift */; };
 		CDCDE2591E67C574007B3784 /* NSDateComparableTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = CDCDE2581E67C574007B3784 /* NSDateComparableTests.swift */; };
@@ -231,6 +233,8 @@
 		80D63D2C1C4F251E00C88D00 /* UnsignedInteger+Extensions.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "UnsignedInteger+Extensions.swift"; sourceTree = "<group>"; };
 		94555EC02E932CF736415F8E /* Pods.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		96E808C6BB3914E0E49C738D /* Pods_SwiftWisdom.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_SwiftWisdom.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		A53A4EE61EEF330100CC53C6 /* Rx+String.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "Rx+String.swift"; sourceTree = "<group>"; };
+		A53A4EE81EF01F8000CC53C6 /* String+Trimmed.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "String+Trimmed.swift"; sourceTree = "<group>"; };
 		CD16463E1CC16A410049BBD5 /* UILabel+Typography.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "UILabel+Typography.swift"; sourceTree = "<group>"; };
 		CDCDE2551E67A6EC007B3784 /* ResultTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ResultTests.swift; sourceTree = "<group>"; };
 		CDCDE2581E67C574007B3784 /* NSDateComparableTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = NSDateComparableTests.swift; path = Date/NSDateComparableTests.swift; sourceTree = "<group>"; };
@@ -636,6 +640,7 @@
 				1C99FB571DD51DEC009FC493 /* String+Data.swift */,
 				1C99FB5B1DD525FF009FC493 /* String+Numbers.swift */,
 				311178581E16CACF00294C25 /* String+Attributed.swift */,
+				A53A4EE81EF01F8000CC53C6 /* String+Trimmed.swift */,
 			);
 			path = String;
 			sourceTree = "<group>";
@@ -711,6 +716,7 @@
 				8037D86D1CAD9981008F324C /* Rx+Extensions.swift */,
 				E7E2576B1E3F99FF00CA3DBD /* Rx+DelayElements.swift */,
 				E7A613971E3FB27F006382DA /* Rx+RepeatingTimeouts.swift */,
+				A53A4EE61EEF330100CC53C6 /* Rx+String.swift */,
 			);
 			path = Rx;
 			sourceTree = "<group>";
@@ -1062,6 +1068,7 @@
 				1C16E3031D27029D008A1001 /* NSLock+Extensions.swift in Sources */,
 				CD16463F1CC16A410049BBD5 /* UILabel+Typography.swift in Sources */,
 				80232C091BF2F1BD00818B6E /* UIColor+Hex.swift in Sources */,
+				A53A4EE91EF01F8000CC53C6 /* String+Trimmed.swift in Sources */,
 				80D63D021C4F16FE00C88D00 /* UIViewController+Nibs.swift in Sources */,
 				802C4BB41C1B6E4600C69D80 /* Downloader.swift in Sources */,
 				80D63D261C4F236F00C88D00 /* Not.swift in Sources */,
@@ -1090,6 +1097,7 @@
 				802C4BBD1C1B6FF300C69D80 /* TimeoutOperation.swift in Sources */,
 				80232C061BF2F1BD00818B6E /* Set+Utilities.swift in Sources */,
 				8002059E1BF683E0005852C9 /* Result.swift in Sources */,
+				A53A4EE71EEF330100CC53C6 /* Rx+String.swift in Sources */,
 				800205A21BF684C7005852C9 /* NSDate+Comparable.swift in Sources */,
 				0CED7D671CD6971400672913 /* Double+Extensions.swift in Sources */,
 				80D63D2F1C4F251E00C88D00 /* UnsignedInteger+Extensions.swift in Sources */,

SwiftWisdom/Core/StandardLibrary/String/String+Trimmed.swift

@@ -0,0 +1,15 @@
+//
+//  String+Trimmed.swift
+//  SwiftWisdom
+//
+//  Created by Maya Saxena on 6/13/17.
+//  Copyright © 2017 Intrepid. All rights reserved.
+//
+
+import Foundation
+
+extension String {
+    func ip_trimmed(toLength length: Int) -> String {
+        return String(prefix(length))
+    }
+}

SwiftWisdom/Rx/Rx+String.swift

@@ -0,0 +1,48 @@
+//
+//  Rx+String.swift
+//  SwiftWisdom
+//
+//  Created by Maya Saxena on 6/12/17.
+//  Copyright © 2017 Intrepid. All rights reserved.
+//
+
+import Foundation
+import RxSwift
+import RxCocoa
+
+extension ObservableType where E == String {
+    public func ip_limitLength(to limit: Int) -> Observable<E> {
+        return self.map { $0.ip_trimmed(toLength: limit) }
+    }
+}
+
+extension ObservableType where E == String? {
+    public func ip_limitLength(to limit: Int) -> Observable<E> {
+        return self.map { $0?.ip_trimmed(toLength: limit) }
+    }
+}
+
+extension ControlPropertyType where E == String {
+    public func ip_limited(toLength length: Int) -> ControlProperty<String> {
+        let values: Observable<String> = asObservable().map { $0.ip_trimmed(toLength: length) }
+        let valueSink: AnyObserver<String> = mapObserver { $0 }
+        return ControlProperty<String>(values: values, valueSink: valueSink)
+    }
+}
+
+extension Reactive where Base: UITextField {
+    /** Limit the length of input to a text field
+
+    Usage Example:
+
+     textField.rx.ip_limitLength(to: 5)
+
+    Note: This does not restrict length when the text property of the text field is modified directly e.g.
+
+     textField.text = "A string over the limit"
+
+     */
+    public func ip_limitInputLength(to limit: Int) -> Disposable {
+        return text.ip_limitLength(to: limit).bind(to: text)
+    }
+}