Amir Abbas
262 lines
9.4 KiB
Swift
262 lines
9.4 KiB
Swift
//
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// FileProvider.swift
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// FileProvider
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//
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// Created by Amir Abbas Mousavian.
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// Copyright © 2016 Mousavian. Distributed under MIT license.
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//
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import Foundation
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/// Containts path and attributes of a file or resource.
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open class FileObject {
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open internal(set) var allValues: [String: Any]
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internal init(allValues: [String: Any]) {
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self.allValues = allValues
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}
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internal init(absoluteURL: URL? = nil, name: String, path: String) {
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self.allValues = [String: Any]()
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self.absoluteURL = absoluteURL
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self.name = name
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self.path = path
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}
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/// url to access the resource, not supported by Dropbox provider
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open internal(set) var absoluteURL: URL? {
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get {
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return allValues["NSURLAbsoluteURLKey"] as? URL
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}
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set {
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allValues["NSURLAbsoluteURLKey"] = newValue
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}
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}
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/// Name of the file, usually equals with the last path component
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open internal(set) var name: String {
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get {
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return allValues[URLResourceKey.nameKey.rawValue] as! String
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}
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set {
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allValues[URLResourceKey.nameKey.rawValue] = newValue
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}
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}
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/// Relative path of file object
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open internal(set) var path: String {
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get {
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return allValues[URLResourceKey.pathKey.rawValue] as! String
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}
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set {
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allValues[URLResourceKey.pathKey.rawValue] = newValue
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}
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}
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/// Size of file on disk, return -1 for directories.
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open internal(set) var size: Int64 {
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get {
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return allValues[URLResourceKey.fileSizeKey.rawValue] as? Int64 ?? -1
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}
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set {
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allValues[URLResourceKey.fileSizeKey.rawValue] = Int(exactly: newValue) ?? Int.max
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}
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}
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/// The time contents of file has been created, returns nil if not set
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open internal(set) var creationDate: Date? {
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get {
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return allValues[URLResourceKey.creationDateKey.rawValue] as? Date
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}
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set {
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allValues[URLResourceKey.creationDateKey.rawValue] = newValue
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}
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}
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/// The time contents of file has been modified, returns nil if not set
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open internal(set) var modifiedDate: Date? {
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get {
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return allValues[URLResourceKey.contentModificationDateKey.rawValue] as? Date
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}
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set {
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allValues[URLResourceKey.contentModificationDateKey.rawValue] = newValue
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}
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}
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/// return resource type of file, usually directory, regular or symLink
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open internal(set) var type: URLFileResourceType? {
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get {
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return allValues[URLResourceKey.fileResourceTypeKey.rawValue] as? URLFileResourceType
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}
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set {
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allValues[URLResourceKey.fileResourceTypeKey.rawValue] = newValue
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}
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}
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@available(*, deprecated, message: "Use FileObject.type property instead.")
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open var fileType: URLFileResourceType? {
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return self.type
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}
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/// File is hidden either because begining with dot or filesystem flags
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/// Setting this value on a file begining with dot has no effect
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open internal(set) var isHidden: Bool {
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get {
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return allValues[URLResourceKey.isHiddenKey.rawValue] as? Bool ?? false
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}
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set {
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allValues[URLResourceKey.isHiddenKey.rawValue] = newValue
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}
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}
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/// File can not be written
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open internal(set) var isReadOnly: Bool {
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get {
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return !(allValues[URLResourceKey.isWritableKey.rawValue] as? Bool ?? true)
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}
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set {
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allValues[URLResourceKey.isWritableKey.rawValue] = !newValue
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}
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}
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/// File is a Directory
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open var isDirectory: Bool {
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return self.type == .directory
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}
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/// File is a normal file
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open var isRegularFile: Bool {
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return self.type == .regular
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}
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/// File is a Symbolic link
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open var isSymLink: Bool {
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return self.type == .symbolicLink
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}
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}
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/// Sorting FileObject array by given criteria, not thread-safe
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public struct FileObjectSorting {
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/// Determines sort kind by which item of File object
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public enum SortType {
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/// Sorting by default Finder (case-insensitive) behavior
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case name
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/// Sorting by case-sensitive form of file name
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case nameCaseSensitive
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/// Sorting by case-in sensitive form of file name
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case nameCaseInsensitive
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/// Sorting by file type
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case `extension`
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/// Sorting by file modified date
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case modifiedDate
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/// Sorting by file creation date
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case creationDate
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/// Sorting by file modified date
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case size
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/// all sort types
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static var allItems: [SortType] {
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return [.name, .nameCaseSensitive, .nameCaseInsensitive, .extension,
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.modifiedDate,.creationDate, .size]
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}
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}
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public let sortType: SortType
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/// puts A before Z, default is true
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public let ascending: Bool
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/// puts directories on top, regardless of other attributes, default is false
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public let isDirectoriesFirst: Bool
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public static let nameAscending = FileObjectSorting(type: .name, ascending: true)
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public static let nameDesceding = FileObjectSorting(type: .name, ascending: false)
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public static let sizeAscending = FileObjectSorting(type: .size, ascending: true)
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public static let sizeDesceding = FileObjectSorting(type: .size, ascending: false)
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public static let extensionAscending = FileObjectSorting(type: .extension, ascending: true)
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public static let extensionDesceding = FileObjectSorting(type: .extension, ascending: false)
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public static let modifiedAscending = FileObjectSorting(type: .modifiedDate, ascending: true)
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public static let modifiedDesceding = FileObjectSorting(type: .modifiedDate, ascending: false)
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public static let createdAscending = FileObjectSorting(type: .creationDate, ascending: true)
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public static let createdDesceding = FileObjectSorting(type: .creationDate, ascending: false)
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public init (type: SortType, ascending: Bool = true, isDirectoriesFirst: Bool = false) {
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self.sortType = type
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self.ascending = ascending
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self.isDirectoriesFirst = isDirectoriesFirst
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}
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/// Sorts array of FileObjects by criterias set in properties
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public func sort(_ files: [FileObject]) -> [FileObject] {
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return files.sorted {
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if isDirectoriesFirst {
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if ($0.isDirectory) && !($1.isDirectory) {
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return true
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}
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if !($0.isDirectory) && ($1.isDirectory) {
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return false
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}
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}
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switch sortType {
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case .name:
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return ($0.name).localizedStandardCompare($1.name) == (ascending ? .orderedAscending : .orderedDescending)
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case .nameCaseSensitive:
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return ($0.name).localizedCompare($1.name) == (ascending ? .orderedAscending : .orderedDescending)
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case .nameCaseInsensitive:
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return ($0.name).localizedCaseInsensitiveCompare($1.name) == (ascending ? .orderedAscending : .orderedDescending)
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case .extension:
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let kind1 = $0.isDirectory ? "folder" : ($0.path as NSString).pathExtension
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let kind2 = $1.isDirectory ? "folder" : ($1.path as NSString).pathExtension
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return kind1.localizedCaseInsensitiveCompare(kind2) == (ascending ? .orderedAscending : .orderedDescending)
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case .modifiedDate:
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let fileMod1 = $0.modifiedDate ?? Date.distantPast
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let fileMod2 = $1.modifiedDate ?? Date.distantPast
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return ascending ? fileMod1 < fileMod2 : fileMod1 > fileMod2
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case .creationDate:
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let fileCreation1 = $0.creationDate ?? Date.distantPast
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let fileCreation2 = $1.creationDate ?? Date.distantPast
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return ascending ? fileCreation1 < fileCreation2 : fileCreation1 > fileCreation2
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case .size:
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return ascending ? $0.size < $1.size : $0.size > $1.size
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}
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}
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}
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}
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extension URLFileResourceType {
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public init(fileTypeValue: FileAttributeType) {
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switch fileTypeValue {
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case FileAttributeType.typeCharacterSpecial: self = .characterSpecial
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case FileAttributeType.typeDirectory: self = .directory
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case FileAttributeType.typeBlockSpecial: self = .blockSpecial
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case FileAttributeType.typeRegular: self = .regular
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case FileAttributeType.typeSymbolicLink: self = .symbolicLink
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case FileAttributeType.typeSocket: self = .socket
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case FileAttributeType.typeUnknown: self = .unknown
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default: self = .unknown
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}
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}
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}
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internal extension URL {
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var uw_scheme: String {
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return self.scheme ?? ""
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}
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}
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internal func jsonToDictionary(_ jsonString: String) -> [String: AnyObject]? {
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guard let data = jsonString.data(using: .utf8) else {
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return nil
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}
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if let dic = try? JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions()) as? [String: AnyObject] {
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return dic
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}
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return nil
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}
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internal func dictionaryToJSON(_ dictionary: [String: AnyObject]) -> String? {
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if let data = try? JSONSerialization.data(withJSONObject: dictionary, options: JSONSerialization.WritingOptions()) {
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return String(data: data, encoding: .utf8)
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}
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return nil
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}
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