mirror of
https://github.com/RevenueCat/purchases-ios
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This is the last change from what was started with #1437. That PR introduced a few private error types, but for the errors returned in the public `APIs` we were still passing around `Error`s everywhere, which didn't provide any compile-time guarantees. ### Goals: - Ensure that public APIs *only* return `ErrorCode`s wrapped with the additional `userInfo`, and not accidentally return other types like `SKError`, `BackendError`, `ErrorCode` directly, etc. - Guarantee type-safety when passing errors around within our internal implementations instead of assuming certain thrown errors are of a particular type. ### Changes: - Created `PurchasesError` for wrapping an `ErrorCode` with the additional `userInfo`. - Changed returned errors from `Error` to `NSError`. This is a change in the API, but the new type is a more specific `Error` so it shouldn't lead to any changes in client apps. - Because `PurchasesError` isn't implicitly convertible to `NSError`, this ensures that we don't return those values directly, and instead use `PurchasesError.asPublicError`. - Changed `ErrorCodeConvertible` to a now more precise `PurchasesErrorConvertible`. Thanks to this new type-safety this PR fixes at least 3 bugs where we were returning private errors instead of `ErrorCode`s. ### Testing: Thanks to #1871 we know that the returned errors are still convertible to `ErrorCode` so users can `switch` over them.
82 lines
2.5 KiB
Swift
82 lines
2.5 KiB
Swift
//
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// Copyright RevenueCat Inc. All Rights Reserved.
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//
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// Licensed under the MIT License (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://opensource.org/licenses/MIT
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//
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// StoreKitError+Extensions.swift
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//
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// Created by Nacho Soto on 12/14/21.
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import StoreKit
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/// - SeeAlso: SKError+Extensions
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@available(iOS 15.0, tvOS 15.0, watchOS 8.0, macOS 12.0, *)
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extension StoreKitError: PurchasesErrorConvertible {
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var asPurchasesError: PurchasesError {
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switch self {
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case .userCancelled:
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return ErrorUtils.purchaseCancelledError(error: self)
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case let .networkError(error):
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return ErrorUtils.networkError(withUnderlyingError: error)
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case let .systemError(error):
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return ErrorUtils.storeProblemError(error: error)
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case .notAvailableInStorefront:
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return ErrorUtils.productNotAvailableForPurchaseError(error: self)
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#if swift(>=5.6)
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case .notEntitled:
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return ErrorUtils.storeProblemError(error: self)
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#endif
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case .unknown:
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/// See also https://github.com/RevenueCat/purchases-ios/issues/392
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/// `StoreKitError` doesn't conform to `CustomNSError` as of `iOS 15.2`
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/// so we can't extract any additional information like we do on `SKError.toPurchasesErrorCode`
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return ErrorUtils.storeProblemError(error: self)
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@unknown default:
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return ErrorUtils.unknownError(error: self)
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}
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}
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}
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@available(iOS 15.0, tvOS 15.0, watchOS 8.0, macOS 12.0, *)
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extension Product.PurchaseError: PurchasesErrorConvertible {
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var asPurchasesError: PurchasesError {
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switch self {
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case .invalidQuantity:
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return ErrorUtils.storeProblemError(error: self)
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case .productUnavailable:
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return ErrorUtils.productNotAvailableForPurchaseError(error: self)
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case .purchaseNotAllowed:
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return ErrorUtils.purchaseNotAllowedError(error: self)
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case .ineligibleForOffer:
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return ErrorUtils.ineligibleError(error: self)
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case
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.invalidOfferIdentifier,
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.invalidOfferPrice,
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.invalidOfferSignature,
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.missingOfferParameters:
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return ErrorUtils.invalidPromotionalOfferError(error: self)
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@unknown default:
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return ErrorUtils.unknownError(error: self)
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}
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}
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}
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