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* [Configen] Fix support for arrays * [Configen] Small tweak to utils class * [Project] Update README * [Project] Re-indent files
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| // | ||
| // ArrayUtils.swift | ||
| // configen | ||
| // | ||
| // Created by Suyash Srijan on 13/01/2020. | ||
| // Copyright © 2020 The App Business. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
|
|
||
| final class ArrayUtils { | ||
| enum Error: Swift.Error { | ||
| case invalidArrayType | ||
| } | ||
|
|
||
| /// Check if this is a valid Array type by checking if the brackets are balanced | ||
| static func isValidArrayType(_ rawType: String) -> Result<String, Error> { | ||
| var stack: [Character] = [] | ||
| var elementNameChars: [Character] = [] | ||
|
|
||
| // A quick and simple check to see if this could *potentially* be an | ||
| // Array type. | ||
| guard rawType.first == .lSquare && rawType.last == .rSquare else { | ||
| return .failure(.invalidArrayType) | ||
| } | ||
|
|
||
| // Okay, let's properly check if the brackets are balanced | ||
| for character in rawType { | ||
| if case .lSquare = character { | ||
| stack.append(character) | ||
| continue | ||
| } | ||
|
|
||
| if case .rSquare = character { | ||
| guard stack.last == .lSquare else { | ||
| return .failure(.invalidArrayType) | ||
| } | ||
| _ = stack.popLast() | ||
| continue | ||
| } | ||
|
|
||
| // We're looking at something that is not a bracket. This is likely | ||
| // the name of the array's element type (the innermost name if this is | ||
| // a nested array). It can only be alphanumeric (i.e. String, UInt8, etc). | ||
| if character.isLetter || character.isNumber { | ||
| elementNameChars.append(character) | ||
| } | ||
| } | ||
|
|
||
| // If we extracted the name of the element type and the brackets were | ||
| // balanced, then this is a valid type. | ||
| if !elementNameChars.isEmpty && stack.isEmpty { | ||
| return .success(String(elementNameChars)) | ||
| } | ||
|
|
||
| // Otherwise, either we're looking at a different type or the user | ||
| // has made a mistake when writing the type name. | ||
| return .failure(.invalidArrayType) | ||
| } | ||
|
|
||
| /// Format a raw value of NSArray type to a String representation | ||
| static func transformArrayToString(_ arrayElementType: String, rawValue: Any) -> String { | ||
| precondition(rawValue is NSArray, "Expected an 'NSArray', got '\(type(of: rawValue))'") | ||
| let rawValueToConvert = castArray(rawValue as! NSArray, arrayElementType: arrayElementType) | ||
| var rawValueString = "\(rawValueToConvert)".trimmingCharacters(in: .whitespacesAndNewlines) | ||
| // Special case: If we have an array of URLs, then we need to drop all | ||
| // double quotes. | ||
| if arrayElementType == "URL" { | ||
| rawValueString = rawValueString.filter { $0 != "\"" } | ||
| } | ||
| return rawValueString | ||
| } | ||
|
|
||
| /// Transform an NSArray to Swift Array by explicitly bridging each element. | ||
| private static func castArray(_ array: NSArray, arrayElementType: String) -> Any { | ||
| var temp: [Any] = [] | ||
| for index in 0..<array.count { | ||
| if let item = array[index] as? NSArray { | ||
| temp.append(castArray(item, arrayElementType: arrayElementType)) | ||
| } else { | ||
| temp.append(castArrayElement(array[index], arrayElementType: arrayElementType)) | ||
| } | ||
| } | ||
|
|
||
| return temp | ||
| } | ||
|
|
||
| /// Cast a value to the given array element type | ||
| private static func castArrayElement(_ value: Any, arrayElementType: String) -> Any { | ||
| func emitFailedCastError() -> Never { | ||
| fatalError("Cast from element of type '\(type(of: value))' to " + | ||
| "type '\(arrayElementType)' is unsupported") | ||
| } | ||
| switch arrayElementType { | ||
| case "String": | ||
| return value as! String | ||
| case "Bool": | ||
| return value as! Bool | ||
| case "Int": | ||
| return value as! Int | ||
| case "Double": | ||
| return value as! Double | ||
| case "URL": | ||
| guard let str = value as? String, let _ = URL(string: str) else { | ||
| emitFailedCastError() | ||
| } | ||
| return "URL(string: \(str))!" | ||
| case "Any": | ||
| return value | ||
| default: | ||
| // TODO: Handle Data, Date, etc types | ||
| emitFailedCastError() | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| // | ||
| // Character+Extensions.swift | ||
| // configen | ||
| // | ||
| // Created by Suyash Srijan on 13/01/2020. | ||
| // Copyright © 2020 The App Business. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
|
|
||
| extension Character { | ||
| static let lSquare = Character("[") | ||
| static let rSquare = Character("]") | ||
| } |
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