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import Foundation
import SwiftUI
import UniformTypeIdentifiers
extension Data {
func saveAsFileToDownloads(filename: String, bounceDock: Bool = true) -> Bool {
let folderURL = FileManager.default.urls(for: .downloadsDirectory, in: .userDomainMask)[0]
let filePath = folderURL.generateUniqueFilePath(filename: filename)
if FileManager.default.createFile(atPath: filePath, contents: nil) {
if let h = FileHandle(forWritingAtPath: filePath) {
try? h.write(contentsOf: self)
try? h.close()
if bounceDock {
#if os(macOS)
var downloadURL = URL(filePath: filePath)
downloadURL.resolveSymlinksInPath()
DistributedNotificationCenter.default().post(name: .init("com.apple.DownloadFileFinished"), object: downloadURL.path)
#endif
}
return true
}
}
return false
}
enum ImageFormat {
case gif
case jpeg
case png
case webp
case unknown
}
var detectedImageFormat: ImageFormat {
guard self.count >= 12 else { return .unknown }
let bytes = [UInt8](self.prefix(12))
// GIF: "GIF8"
if bytes[0] == 0x47 && bytes[1] == 0x49 && bytes[2] == 0x46 && bytes[3] == 0x38 {
return .gif
}
// JPEG: FF D8 FF
if bytes[0] == 0xFF && bytes[1] == 0xD8 && bytes[2] == 0xFF {
return .jpeg
}
// PNG: 89 50 4E 47 0D 0A 1A 0A
if bytes[0] == 0x89 && bytes[1] == 0x50 && bytes[2] == 0x4E && bytes[3] == 0x47 && bytes[4] == 0x0D && bytes[5] == 0x0A && bytes[6] == 0x1A && bytes[7] == 0x0A {
return .png
}
// WebP: "RIFF" at 0-3 and "WEBP" at 8-11
if bytes[0] == 0x52 && bytes[1] == 0x49 && bytes[2] == 0x46 && bytes[3] == 0x46 && bytes[8] == 0x57 && bytes[9] == 0x45 && bytes[10] == 0x42 && bytes[11] == 0x50 {
return .webp
}
return .unknown
}
}
// MARK: -
extension URL {
func generateUniqueFilePath(filename base: String) -> String {
let fileManager = FileManager.default
var finalName = base
var counter = 2
// Helper function to generate a new filename with a counter
func makeFileName() -> String {
let baseName = (base as NSString).deletingPathExtension
let extensionName = (base as NSString).pathExtension
return extensionName.isEmpty ? "\(baseName) \(counter)" : "\(baseName) \(counter).\(extensionName)"
}
// Check if file exists and append counter until a unique name is found
var filePath = self.appending(component: finalName).path(percentEncoded: false)
while fileManager.fileExists(atPath: filePath) {
finalName = makeFileName()
filePath = self.appending(component: finalName).path(percentEncoded: false)
counter += 1
}
return filePath
}
}
// MARK: -
extension UTType {
var canBePreviewedByQuickLook: Bool {
// QuickLook supports most common document types
let supportedSupertypes: [UTType] = [
.image,
.movie,
.audio,
.pdf,
.font,
.usdz,
.text,
.sourceCode,
.spreadsheet,
.presentation,
// Microsoft Office
.init(filenameExtension: "doc")!,
.init(filenameExtension: "docx")!,
.init(filenameExtension: "xls")!,
.init(filenameExtension: "xlsx")!,
.init(filenameExtension: "ppt")!,
.init(filenameExtension: "pptx")!,
]
return supportedSupertypes.contains { self.conforms(to: $0) }
}
}
// MARK: -
extension String {
var isBlank: Bool {
self.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
}
func markdownToAttributedString() -> AttributedString {
let markdownText = self.convertingLinksToMarkdown()
let attr = (try? AttributedString(markdown: markdownText, options: .init(interpretedSyntax: .inlineOnlyPreservingWhitespace))) ?? AttributedString(self)
return attr
}
func convertToAttributedStringWithLinks() -> AttributedString {
let attributedString: NSMutableAttributedString = NSMutableAttributedString(string: self)
let matches = self.ranges(of: RegularExpressions.relaxedLink)
for match in matches {
let matchString = String(self[match])
if matchString.isEmailAddress() {
attributedString.addAttribute(.link, value: "mailto:\(matchString)", range: NSRange(match, in: self))
}
else {
attributedString.addAttribute(.link, value: matchString, range: NSRange(match, in: self))
}
// attributedString.addAttribute(.underlineStyle, value: 1, range: NSRange(match, in: self))
}
return AttributedString(attributedString)
}
func isEmailAddress() -> Bool {
self.wholeMatch(of: RegularExpressions.emailAddress) != nil
}
func isWebURL() -> Bool {
guard let url = URL(string: self) else {
return false
}
switch url.scheme?.lowercased() {
case "http", "https":
return true
default:
return false
}
}
func isImageURL() -> Bool {
guard let url = URL(string: self) else {
return false
}
switch url.pathExtension.lowercased() {
case "jpg", "jpeg", "png", "gif":
return true
default:
return false
}
}
func convertingLinksToMarkdown() -> String {
// var cp = String(self)
self.replacing(RegularExpressions.relaxedLink) { match in
let linkText = self[match.range]
// Only add https:// if the link doesn't already have a scheme
let hasScheme = (try? RegularExpressions.supportedLinkScheme.prefixMatch(in: linkText)) != nil
let url = hasScheme ? String(linkText) : "https://\(linkText)"
return "[\(linkText)](\(url))"
}
// cp.replace(RegularExpressions.relaxedLink) { match -> String in
// let linkText = self[match.range]
// var injectedScheme = "https://"
// if let _ = try? RegularExpressions.supportedLinkScheme.prefixMatch(in: linkText) {
// injectedScheme = ""
// }
//
// return "[\(linkText)](\(injectedScheme)\(linkText))"
// }
// return cp
}
}
// MARK: -
extension Binding where Value: OptionSet, Value == Value.Element {
func bindedValue(_ options: Value) -> Bool {
return wrappedValue.contains(options)
}
func bind(_ options: Value) -> Binding<Bool> {
return .init { () -> Bool in
self.wrappedValue.contains(options)
} set: { newValue in
if newValue {
self.wrappedValue.insert(options)
} else {
self.wrappedValue.remove(options)
}
}
}
}
// MARK: -
extension Color {
init(hex: Int, opacity: Double = 1.0) {
self.init(red: Double((hex >> 16) & 0xFF) / 255.0, green: Double((hex >> 8) & 0xFF) / 255.0, blue: Double(hex & 0xFF) / 255.0, opacity: opacity)
}
}
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