Add Rx string limiting extensions

Author: mayasaxena

SwiftWisdom.xcodeproj/project.pbxproj

@@ -82,6 +82,8 @@
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+		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 */; };
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 		CDCDE2561E67A6EC007B3784 /* ResultTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = CDCDE2551E67A6EC007B3784 /* ResultTests.swift */; };
 		CDCDE2591E67C574007B3784 /* NSDateComparableTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = CDCDE2581E67C574007B3784 /* NSDateComparableTests.swift */; };
@@ -195,6 +197,8 @@
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+		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>"; };
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 		CDCDE2551E67A6EC007B3784 /* ResultTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ResultTests.swift; sourceTree = "<group>"; };
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@@ -583,6 +587,7 @@
 				FFCA61AF1C8A1F1B00FD35A7 /* String+Empty.swift */,
 				1C99FB571DD51DEC009FC493 /* String+Data.swift */,
 				1C99FB5B1DD525FF009FC493 /* String+Numbers.swift */,
+				A53A4EE81EF01F8000CC53C6 /* String+Trimmed.swift */,
 			);
 			path = String;
 			sourceTree = "<group>";
@@ -652,6 +657,7 @@
 				8037D86D1CAD9981008F324C /* Rx+Extensions.swift */,
 				E7E2576B1E3F99FF00CA3DBD /* Rx+DelayElements.swift */,
 				E7A613971E3FB27F006382DA /* Rx+RepeatingTimeouts.swift */,
+				A53A4EE61EEF330100CC53C6 /* Rx+String.swift */,
 			);
 			path = Rx;
 			sourceTree = "<group>";
@@ -957,6 +963,7 @@
 				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 */,
@@ -982,6 +989,7 @@
 				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 +1,19 @@
+//
+//  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 {
+        if ip_length > length {
+            return substring(to: index(startIndex, offsetBy: length))
+        } else {
+            return self
+        }
+    }
+}

SwiftWisdom/Rx/Rx+String.swift

@@ -0,0 +1,34 @@
+//
+//  Rx+String.swift
+//  SwiftWisdom
+//
+//  Created by Maya Saxena on 6/12/17.
+//  Copyright © 2017 Intrepid. All rights reserved.
+//
+
+import Foundation
+import RxSwift
+
+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 Reactive where Base: UITextField {
+    /** Limit the length of input to a text field
+
+    Usage Example:
+
+     textField.rx.ip_limitLength(to: 5)
+    */
+    public func ip_limitLength(to limit: Int) -> Disposable {
+        return text.ip_limitLength(to: limit).bind(to: text)
+    }
+}