mirror of https://github.com/oxen-io/session-ios
Matthew Chen
8 years ago
parent
2282733fa9
commit
69816cdf0e
@ -1,217 +0,0 @@
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//
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// Copyright (c) 2017 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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@objc
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protocol DataSource {
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// This method should not be called unless necessary as it
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// be expensive.
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func data() -> Data
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func dataUrl(fileExtension: String) -> URL?
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func dataPath(fileExtension: String) -> String?
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func dataPathIfOnDisk() -> String?
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func dataLength() -> Int
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}
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@objc
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class DataSourceValue: NSObject, DataSource {
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static let TAG = "[DataSourceValue]"
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private let value: Data
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private var path: String?
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// MARK: Constructor
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internal required init(_ value: Data) {
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self.value = value
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super.init()
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}
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func data() -> Data {
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return value
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}
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func dataUrl(fileExtension: String) -> URL? {
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guard let path = dataPath(fileExtension:fileExtension) else {
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return nil
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}
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return URL(fileURLWithPath: path)
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}
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func dataPath(fileExtension: String) -> String? {
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if let path = path {
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return path
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}
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let directory = NSTemporaryDirectory()
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let fileName = NSUUID().uuidString + "." + fileExtension
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let filePath = (directory as NSString).appendingPathComponent(fileName)
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do {
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try value.write(to: URL(fileURLWithPath:filePath))
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path = filePath
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} catch {
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owsFail("\(DataSourceValue.TAG) Could not write data to disk: \(fileExtension)")
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}
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return filePath
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}
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func dataPathIfOnDisk() -> String? {
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if let path = path {
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return path
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}
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return nil
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}
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func dataLength() -> Int {
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return value.count
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}
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class func empty() -> DataSource {
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return DataSourceValue(Data())
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}
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}
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@objc
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class DataSourcePath: NSObject, DataSource {
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static let TAG = "[DataSourcePath]"
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private let path: String
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private var cachedData: Data?
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private var cachedLength: Int?
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// MARK: Constructor
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internal required init(_ path: String) {
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self.path = path
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super.init()
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}
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func data() -> Data {
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if let cachedData = cachedData {
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return cachedData
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}
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Logger.error("\(DataSourcePath.TAG) reading data: \(path)")
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do {
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try cachedData = NSData(contentsOfFile:path) as Data
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} catch {
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owsFail("\(DataSourcePath.TAG) Could not read data from disk: \(path)")
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cachedData = Data()
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}
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return cachedData!
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}
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func dataUrl(fileExtension: String) -> URL? {
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return URL(fileURLWithPath: path)
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}
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func dataPath(fileExtension: String) -> String? {
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return path
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}
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func dataPathIfOnDisk() -> String? {
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return path
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}
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func dataLength() -> Int {
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if let cachedLength = cachedLength {
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return cachedLength
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}
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do {
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let fileAttributes = try FileManager.default.attributesOfItem(atPath: path)
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let fileSize = fileAttributes[FileAttributeKey.size] as! UInt64
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cachedLength = Int(fileSize)
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} catch {
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owsFail("\(DataSourcePath.TAG) Could not read data length from disk: \(path)")
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cachedLength = 0
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}
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return cachedLength!
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}
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}
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@objc
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class DataSourceUrl: NSObject, DataSource {
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static let TAG = "[DataSourceUrl]"
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private let url: URL
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private var cachedData: Data?
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private var cachedLength: Int?
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// MARK: Constructor
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internal required init(_ url: URL) {
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if !url.isFileURL {
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owsFail("\(DataSourceUrl.TAG) URL is not a file URL: \(url)")
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}
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self.url = url
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super.init()
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}
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func data() -> Data {
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if let cachedData = cachedData {
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return cachedData
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}
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guard url.isFileURL else {
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owsFail("\(DataSourceUrl.TAG) URL is not a file URL: \(url)")
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return Data()
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}
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Logger.error("\(DataSourceUrl.TAG) reading data: \(url)")
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do {
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try cachedData = Data(contentsOf:url)
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} catch {
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owsFail("\(DataSourceUrl.TAG) Could not read data from disk: \(url)")
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cachedData = Data()
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}
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return cachedData!
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}
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func dataUrl(fileExtension: String) -> URL? {
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return url
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}
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func dataPath(fileExtension: String) -> String? {
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guard url.isFileURL else {
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owsFail("\(DataSourceUrl.TAG) URL is not a file URL: \(url)")
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return nil
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}
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return url.path
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}
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func dataPathIfOnDisk() -> String? {
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guard url.isFileURL else {
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owsFail("\(DataSourceUrl.TAG) URL is not a file URL: \(url)")
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return nil
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}
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return url.path
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}
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func dataLength() -> Int {
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if let cachedLength = cachedLength {
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return cachedLength
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}
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guard url.isFileURL else {
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owsFail("\(DataSourceUrl.TAG) URL is not a file URL: \(url)")
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return 0
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}
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do {
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let fileAttributes = try FileManager.default.attributesOfItem(atPath: url.path)
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let fileSize = fileAttributes[FileAttributeKey.size] as! UInt64
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cachedLength = Int(fileSize)
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} catch {
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owsFail("\(DataSourceUrl.TAG) Could not read data length from disk: \(url)")
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cachedLength = 0
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}
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return cachedLength!
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}
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}
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@ -0,0 +1,75 @@
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//
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// Copyright (c) 2017 Open Whisper Systems. All rights reserved.
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//
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NS_ASSUME_NONNULL_BEGIN
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// A protocol that abstracts away a source of NSData
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// and allows us to:
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//
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// * Lazy-load if possible.
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// * Avoid duplicate reads & writes.
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@protocol DataSource
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// Should not be called unless necessary as it can involve an expensive read.
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- (NSData *)data;
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// The URL for the data. Should always be a File URL.
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//
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// Should not be called unless necessary as it can involve an expensive write.
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//
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// Will only return nil in the error case.
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//
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// TODO: Try to remove the parameter.
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- (nullable NSURL *)dataUrl:(NSString *)fileExtension;
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// The file path for the data.
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//
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// Should not be called unless necessary as it can involve an expensive write.
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//
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// Will only return nil in the error case.
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//
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// TODO: Try to remove the parameter.
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- (nullable NSString *)dataPath:(NSString *)fileExtension;
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// The file path for the data, if it already exists on disk.
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//
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// This method is safe to call as it will not do any expensive reads or writes.
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//
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// May return nil if the data does not reside on disk.
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- (nullable NSString *)dataPathIfOnDisk;
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// Will return zero in the error case.
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- (NSUInteger)dataLength;
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@end
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#pragma mark -
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@interface DataSourceValue : NSObject <DataSource>
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+ (nullable id<DataSource>)dataSourceWithData:(NSData *)data;
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+ (id<DataSource>)emptyDataSource;
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@end
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#pragma mark -
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@interface DataSourcePath : NSObject <DataSource>
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+ (nullable id<DataSource>)dataSourceWithURL:(NSURL *)fileUrl;
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+ (nullable id<DataSource>)dataSourceWithFilePath:(NSString *)filePath;
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@end
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//#pragma mark -
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//
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//@interface DataSourceURL : NSObject <DataSource>
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//
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//+ (id<DataSource>)dataSourceWithURL:(NSURL *)fileUrl;
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//
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//@end
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NS_ASSUME_NONNULL_END
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@ -0,0 +1,436 @@
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//
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// Copyright (c) 2017 Open Whisper Systems. All rights reserved.
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//
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#import "DataSource.h"
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NS_ASSUME_NONNULL_BEGIN
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@interface DataSourceValue ()
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@property (nonatomic) NSData *dataValue;
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// This property is lazy-populated.
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@property (nonatomic) NSString *cachedFilePath;
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@end
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#pragma mark -
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@implementation DataSourceValue
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+ (nullable id<DataSource>)dataSourceWithData:(NSData *)data
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{
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OWSAssert(data);
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if (!data) {
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return nil;
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}
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DataSourceValue *instance = [DataSourceValue new];
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instance.dataValue = data;
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return instance;
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}
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+ (id<DataSource>)emptyDataSource
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{
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return [self dataSourceWithData:[NSData new]];
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}
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- (NSData *)data
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{
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OWSAssert(self.dataValue);
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return self.dataValue;
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}
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- (nullable NSURL *)dataUrl:(NSString *)fileExtension
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{
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NSString *_Nullable path = [self dataPath:fileExtension];
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return (path ? [NSURL fileURLWithPath:path] : nil);
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}
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- (nullable NSString *)dataPath:(NSString *)fileExtension
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{
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OWSAssert(self.dataValue);
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@synchronized(self)
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{
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if (!self.cachedFilePath) {
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NSString *dirPath = NSTemporaryDirectory();
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NSString *fileName = [[[NSUUID UUID] UUIDString] stringByAppendingPathExtension:fileExtension];
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NSString *filePath = [dirPath stringByAppendingPathComponent:fileName];
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if ([self.dataValue writeToFile:fileName atomically:YES]) {
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self.cachedFilePath = filePath;
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} else {
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OWSFail(@"%@ Could not write data to disk: %@", self.tag, fileExtension);
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}
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}
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return self.cachedFilePath;
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}
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}
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- (nullable NSString *)dataPathIfOnDisk
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{
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return self.cachedFilePath;
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}
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- (NSUInteger)dataLength
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{
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OWSAssert(self.dataValue);
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return self.dataValue.length;
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}
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#pragma mark - Logging
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+ (NSString *)tag
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{
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return [NSString stringWithFormat:@"[%@]", self.class];
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}
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- (NSString *)tag
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{
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return self.class.tag;
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}
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@end
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#pragma mark -
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@interface DataSourcePath ()
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@property (nonatomic) NSString *filePath;
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// These properties are lazy-populated.
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@property (nonatomic) NSData *cachedData;
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@property (nonatomic) NSNumber *cachedDataLength;
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@end
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#pragma mark -
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@implementation DataSourcePath
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+ (nullable id<DataSource>)dataSourceWithURL:(NSURL *)fileUrl;
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{
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OWSAssert(fileUrl);
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if (!fileUrl || ![fileUrl isFileURL]) {
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return nil;
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}
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DataSourcePath *instance = [DataSourcePath new];
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instance.filePath = fileUrl.path;
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return instance;
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}
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+ (nullable id<DataSource>)dataSourceWithFilePath:(NSString *)filePath;
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{
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OWSAssert(filePath);
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if (!filePath) {
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return nil;
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}
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DataSourcePath *instance = [DataSourcePath new];
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instance.filePath = filePath;
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return instance;
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}
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- (NSData *)data
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{
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OWSAssert(self.filePath);
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@synchronized(self)
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{
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if (!self.cachedData) {
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self.cachedData = [NSData dataWithContentsOfFile:self.filePath];
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}
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if (!self.cachedData) {
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OWSFail(@"%@ Could not read data from disk: %@", self.tag, self.filePath);
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self.cachedData = [NSData new];
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}
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return self.cachedData;
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}
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}
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- (nullable NSURL *)dataUrl:(NSString *)fileExtension
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{
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OWSAssert(self.filePath);
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return [NSURL fileURLWithPath:self.filePath];
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}
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- (nullable NSString *)dataPath:(NSString *)fileExtension
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{
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OWSAssert(self.filePath);
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return self.filePath;
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}
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- (nullable NSString *)dataPathIfOnDisk
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{
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OWSAssert(self.filePath);
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return self.filePath;
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}
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- (NSUInteger)dataLength
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{
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OWSAssert(self.filePath);
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@synchronized(self)
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{
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if (!self.cachedDataLength) {
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NSError *error;
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NSDictionary<NSFileAttributeKey, id> *_Nullable attributes =
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[[NSFileManager defaultManager] attributesOfItemAtPath:self.filePath error:&error];
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if (!attributes || error) {
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OWSFail(@"%@ Could not read data length from disk: %@", self.tag, self.filePath);
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self.cachedDataLength = @(0);
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} else {
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uint64_t fileSize = [attributes fileSize];
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self.cachedDataLength = @(fileSize);
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}
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}
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return [self.cachedDataLength unsignedIntegerValue];
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}
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}
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#pragma mark - Logging
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+ (NSString *)tag
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{
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return [NSString stringWithFormat:@"[%@]", self.class];
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}
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- (NSString *)tag
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{
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return self.class.tag;
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}
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@end
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//#pragma mark -
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//
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//@interface DataSourceURL ()
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//
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//@property (nonatomic) NSURL *fileUrl;
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//
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//// These properties are lazy-populated.
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//@property (nonatomic) NSData *cachedData;
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//@property (nonatomic) NSNumber *cachedDataLength;
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//
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//@end
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//
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//#pragma mark -
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//
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//@implementation DataSourceURL
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//
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//+ (id<DataSource>)dataSourceWithURL:(NSURL *)fileUrl;
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//{
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// DataSourceValue *instance = [DataSourceValue new];
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// instance.fileUrl = fileUrl;
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// return instance;
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//}
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//
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//- (NSData *)data
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//{
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// OWSAssert(self.filePath);
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//
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// @synchronized (self) {
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// if (!self.cachedData) {
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// self.cachedData = [NSData dataWithContentsOfFile:self.filePath];
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// }
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// if (!self.cachedData) {
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// OWSFail(@"%@ Could not read data from disk: %@", self.tag, self.filePath);
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// self.cachedData = [NSData new];
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// }
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// return self.cachedData;
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// }
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//}
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//
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//- (nullable NSURL *)dataUrl:(NSString *)fileExtension
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//{
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// OWSAssert(self.filePath);
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//
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// return [NSURL fileURLWithPath:self.filePath];
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//}
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//
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//- (nullable NSString *)dataPath:(NSString *)fileExtension
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//{
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// OWSAssert(self.filePath);
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//
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// return self.filePath;
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//}
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//
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//- (nullable NSString *)dataPathIfOnDisk
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//{
|
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// OWSAssert(self.filePath);
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//
|
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// return self.filePath;
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//}
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//
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//- (NSUInteger)dataLength
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//{
|
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// OWSAssert(self.filePath);
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//
|
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// @synchronized (self) {
|
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// if (!self.cachedDataLength) {
|
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// NSError *error;
|
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// NSDictionary<NSFileAttributeKey, id> *_Nullable attributes =
|
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// [[NSFileManager defaultManager] attributesOfItemAtPath:self.filePath error:&error];
|
||||
// if (!attributes || error) {
|
||||
// OWSFail(@"%@ Could not read data length from disk: %@", self.tag, self.filePath);
|
||||
// self.cachedDataLength = @(0);
|
||||
// } else {
|
||||
// uint64_t fileSize = [attributes fileSize];
|
||||
// self.cachedDataLength = @(fileSize);
|
||||
// }
|
||||
// }
|
||||
// return [self.cachedDataLength unsignedIntegerValue];
|
||||
// }
|
||||
//}
|
||||
//
|
||||
//#pragma mark - Logging
|
||||
//
|
||||
//+ (NSString *)tag
|
||||
//{
|
||||
// return [NSString stringWithFormat:@"[%@]", self.class];
|
||||
//}
|
||||
//
|
||||
//- (NSString *)tag
|
||||
//{
|
||||
// return self.class.tag;
|
||||
//}
|
||||
//
|
||||
//@end
|
||||
//
|
||||
//#pragma mark -
|
||||
//
|
||||
//
|
||||
//@objc class DataSourcePath : NSObject, DataSource {
|
||||
// static let TAG = "[DataSourcePath]"
|
||||
//
|
||||
// private let path : String
|
||||
//
|
||||
// private var cachedData : Data
|
||||
// ?
|
||||
//
|
||||
// private var cachedLength
|
||||
// : Int
|
||||
// ?
|
||||
//
|
||||
// // MARK: Constructor
|
||||
//
|
||||
// internal required init(_ path
|
||||
// : String){ self.path = path super.init() }
|
||||
//
|
||||
// func
|
||||
// data()
|
||||
// ->Data
|
||||
// {
|
||||
// if
|
||||
// let cachedData
|
||||
// = cachedData{ return cachedData } Logger.error("\(DataSourcePath.TAG) reading data: \(path)") do
|
||||
// {
|
||||
// try
|
||||
// cachedData = NSData(contentsOfFile : path) as Data
|
||||
// }
|
||||
// catch
|
||||
// {
|
||||
// owsFail("\(DataSourcePath.TAG) Could not read data from disk: \(path)") cachedData = Data()
|
||||
// }
|
||||
// return cachedData !
|
||||
// }
|
||||
//
|
||||
// return cachedLength !
|
||||
// }
|
||||
//}
|
||||
//
|
||||
//@objc class DataSourceUrl : NSObject,
|
||||
// DataSource {
|
||||
// static let TAG = "[DataSourceUrl]"
|
||||
//
|
||||
// private let url : URL
|
||||
//
|
||||
// private var cachedData : Data
|
||||
// ?
|
||||
//
|
||||
// private var cachedLength
|
||||
// : Int
|
||||
// ?
|
||||
//
|
||||
// // MARK: Constructor
|
||||
//
|
||||
// internal required
|
||||
// init(_ url
|
||||
// : URL)
|
||||
// {
|
||||
// if
|
||||
// !url.isFileURL{ owsFail("\(DataSourceUrl.TAG) URL is not a file URL: \(url)") } self.url = url
|
||||
// super.init()
|
||||
// }
|
||||
//
|
||||
// func data()->Data
|
||||
// {
|
||||
// if
|
||||
// let cachedData
|
||||
// = cachedData{ return cachedData } guard url
|
||||
// .isFileURL else {
|
||||
// owsFail("\(DataSourceUrl.TAG) URL is not a file URL: \(url)") return Data()
|
||||
// } Logger.error("\(DataSourceUrl.TAG) reading data: \(url)") do
|
||||
// {
|
||||
// try
|
||||
// cachedData = Data(contentsOf : url)
|
||||
// }
|
||||
// catch
|
||||
// {
|
||||
// owsFail("\(DataSourceUrl.TAG) Could not read data from disk: \(url)") cachedData = Data()
|
||||
// }
|
||||
// return cachedData !
|
||||
// }
|
||||
//
|
||||
// func dataUrl(fileExtension
|
||||
// : String)
|
||||
// ->URL
|
||||
// ? { return url }
|
||||
//
|
||||
// func dataPath(fileExtension
|
||||
// : String)
|
||||
// ->String
|
||||
// ? { guard url
|
||||
// .isFileURL else {
|
||||
// owsFail("\(DataSourceUrl.TAG) URL is not a file URL: \(url)") return nil } return url.path }
|
||||
//
|
||||
// func dataPathIfOnDisk()
|
||||
// ->String
|
||||
// ? { guard url
|
||||
// .isFileURL else {
|
||||
// owsFail("\(DataSourceUrl.TAG) URL is not a file URL: \(url)") return nil } return url.path }
|
||||
//
|
||||
// func dataLength()
|
||||
// ->Int
|
||||
// {
|
||||
// if
|
||||
// let cachedLength = cachedLength{ return cachedLength } guard url.isFileURL else
|
||||
// {
|
||||
// owsFail("\(DataSourceUrl.TAG) URL is not a file URL: \(url)") return 0
|
||||
// }
|
||||
//
|
||||
// do {
|
||||
// let fileAttributes = try
|
||||
// FileManager.default.attributesOfItem(atPath
|
||||
// : url.path) let fileSize
|
||||
// = fileAttributes[FileAttributeKey.size] as !UInt64 cachedLength = Int(fileSize)
|
||||
// }
|
||||
// catch
|
||||
// {
|
||||
// owsFail("\(DataSourceUrl.TAG) Could not read data length from disk: \(url)") cachedLength = 0
|
||||
// }
|
||||
//
|
||||
// return cachedLength !
|
||||
// }
|
||||
//}
|
||||
|
||||
NS_ASSUME_NONNULL_END
|
||||
Loading…
Reference in New Issue