Javier Cicchelli
9bcdaa697b
This PR contains all the work related to setting up this project as required to implement the [Assignment](https://repo.rock-n-code.com/rock-n-code/deep-linking-assignment/wiki/Assignment) on top, as intended. To summarise this work: - [x] created a new **Xcode** project; - [x] cloned the `Wikipedia` app and inserted it into the **Xcode** project; - [x] created the `Locations` app and also, its `Libraries` package; - [x] created the `Shared` package to share dependencies between the apps; - [x] added a `Makefile` file and implemented some **environment** and **help** commands. Co-authored-by: Javier Cicchelli <javier@rock-n-code.com> Reviewed-on: rock-n-code/deep-linking-assignment#1
63 lines
2.9 KiB
Swift
63 lines
2.9 KiB
Swift
import Foundation
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enum CacheItemMigrationPolicyError: Error {
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case unrecognizedSourceAttributeTypes
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}
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class CacheItemMigrationPolicy: NSEntityMigrationPolicy {
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private let fetcher = ImageFetcher()
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override func createDestinationInstances(forSource sInstance: NSManagedObject, in mapping: NSEntityMapping, manager: NSMigrationManager) throws {
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if sInstance.entity.name == "CacheItem" {
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guard let key = sInstance.primitiveValue(forKey: "key") as? String,
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let variant = sInstance.primitiveValue(forKey: "variant") as? Int64,
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let date = sInstance.primitiveValue(forKey: "date") as? Date else {
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throw CacheItemMigrationPolicyError.unrecognizedSourceAttributeTypes
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}
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let destinationItem = NSEntityDescription.insertNewObject(forEntityName: "CacheItem", into: manager.destinationContext)
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destinationItem.setValue(key, forKey: "key")
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let newVariant = String(variant)
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destinationItem.setValue(newVariant, forKey: "variant")
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destinationItem.setValue(date, forKey: "date")
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var isDownloaded = false
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autoreleasepool { () -> Void in
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guard
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let fileName = fetcher.uniqueFileNameForItemKey(key, variant: newVariant),
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let headerFileName = fetcher.uniqueHeaderFileNameForItemKey(key, variant: newVariant) else {
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return
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}
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let fileURL = CacheFileWriterHelper.fileURL(for: fileName)
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let filePath = fileURL.path
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// artifically create and save image response header
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var headers: [String: String] = [:]
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headers["Content-Type"] = FileManager.default.getValueForExtendedFileAttributeNamed(WMFExtendedFileAttributeNameMIMEType, forFileAtPath: filePath)
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let values = try? fileURL.resourceValues(forKeys: [URLResourceKey.fileSizeKey])
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if let fileSize = values?.fileSize {
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headers["Content-Length"] = String(fileSize)
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}
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guard !headers.isEmpty else {
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return
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}
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CacheFileWriterHelper.saveResponseHeader(headerFields: headers, toNewFileName: headerFileName) { (result) in
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switch result {
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case .success, .exists:
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isDownloaded = true
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case .failure:
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break
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}
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}
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}
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destinationItem.setValue(isDownloaded, forKey: "isDownloaded")
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destinationItem.setValue(nil, forKey: "url")
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manager.associate(sourceInstance: sInstance, withDestinationInstance: destinationItem, for: mapping)
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}
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}
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}
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