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@NonEmptyStringDecodable (#2819)
This allows decorating a `String` property in a `Decodable` type so it ensures it gets converted to `nil` if it's empty. It will be used for `PaywallData`.
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| @@ -0,0 +1,59 @@ | ||
| // | ||
| // Copyright RevenueCat Inc. All Rights Reserved. | ||
| // | ||
| // Licensed under the MIT License (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://opensource.org/licenses/MIT | ||
| // | ||
| // NonEmptyStringDecodable.swift | ||
| // | ||
| // Created by Nacho Soto on 7/14/23. | ||
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| import Foundation | ||
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| /// A property wrapper that ensures decoded strings aren't empty | ||
| /// - Example: | ||
| /// ``` | ||
| /// struct Data { | ||
| /// @NonEmptyStringDecodable var value: String? // becomes `nil` if value is empty or has only whitespaces | ||
| /// } | ||
| /// ``` | ||
| @propertyWrapper | ||
| struct NonEmptyStringDecodable { | ||
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| var wrappedValue: String? | ||
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| } | ||
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| extension NonEmptyStringDecodable: Equatable, Hashable {} | ||
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| extension NonEmptyStringDecodable: Decodable { | ||
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| init(from decoder: Decoder) throws { | ||
| let container = try decoder.singleValueContainer() | ||
| self.wrappedValue = try container.decode(String?.self)?.notEmptyOrWhitespaces | ||
| } | ||
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| } | ||
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| extension NonEmptyStringDecodable: Encodable { | ||
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| func encode(to encoder: Encoder) throws { | ||
| var container = encoder.singleValueContainer() | ||
| try container.encode(self.wrappedValue) | ||
| } | ||
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| } | ||
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| extension KeyedDecodingContainer { | ||
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| func decode( | ||
| _ type: NonEmptyStringDecodable.Type, | ||
| forKey key: Key | ||
| ) throws -> NonEmptyStringDecodable { | ||
| return try self.decodeIfPresent(type, forKey: key) ?? .init() | ||
| } | ||
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| } |
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