ios: move image utils to app (#1642)

* ios: move image utils to app

* name in comments

apps/ios/SimpleXChat/ChatTypes.swift

@@ -2070,7 +2070,7 @@ public struct CIFile: Decodable {
         CIFile(fileId: fileId, fileName: fileName, fileSize: fileSize, filePath: filePath, fileStatus: fileStatus)
     }
 
-    var loaded: Bool {
+    public var loaded: Bool {
         get {
             switch self.fileStatus {
             case .sndStored: return true

apps/ios/SimpleXChat/FileUtils.swift

@@ -7,9 +7,7 @@
 //
 
 import Foundation
-import SwiftUI
 import OSLog
-import SwiftyGif
 
 let logger = Logger()
 
@@ -168,88 +166,7 @@ public func getAppFilePath(_ fileName: String) -> URL {
     getAppFilesDirectory().appendingPathComponent(fileName)
 }
 
-public func getLoadedFileName(_ file: CIFile?) -> String? {
-    if let file = file,
-       file.loaded,
-       let fileName = file.filePath {
-        return fileName
-    }
-    return nil
-}
-
-public func getLoadedFilePath(_ file: CIFile?) -> String? {
-    if let fileName = getLoadedFileName(file) {
-        return getAppFilePath(fileName).path
-    }
-    return nil
-}
-
-public func getLoadedImage(_ file: CIFile?) -> UIImage? {
-    let loadedFilePath = getLoadedFilePath(file)
-    if let loadedFilePath = loadedFilePath, let fileName = file?.filePath {
-        let filePath = getAppFilePath(fileName)
-        do {
-            let data = try Data(contentsOf: filePath)
-            let img = UIImage(data: data)
-            try img?.setGifFromData(data, levelOfIntegrity: 1.0)
-            return img
-        } catch {
-            return UIImage(contentsOfFile: loadedFilePath)
-        }
-    }
-    return nil
-}
-
-public func saveFileFromURL(_ url: URL) -> String? {
-    let savedFile: String?
-    if url.startAccessingSecurityScopedResource() {
-        do {
-            let fileData = try Data(contentsOf: url)
-            let fileName = uniqueCombine(url.lastPathComponent)
-            savedFile = saveFile(fileData, fileName)
-        } catch {
-            logger.error("FileUtils.saveFileFromURL error: \(error.localizedDescription)")
-            savedFile = nil
-        }
-    } else {
-        logger.error("FileUtils.saveFileFromURL startAccessingSecurityScopedResource returned false")
-        savedFile = nil
-    }
-    url.stopAccessingSecurityScopedResource()
-    return savedFile
-}
-
-public func saveImage(_ uiImage: UIImage) -> String? {
-    if let imageDataResized = resizeImageToDataSize(uiImage, maxDataSize: MAX_IMAGE_SIZE) {
-        let ext = uiImage.hasAlpha() ? "png" : "jpg"
-        let fileName = generateNewFileName("IMG", ext)
-        return saveFile(imageDataResized, fileName)
-    }
-    return nil
-}
-
-public func saveAnimImage(_ image: UIImage) -> String? {
-    let fileName = generateNewFileName("IMG", "gif")
-    guard let imageData = image.imageData else { return nil }
-    return saveFile(imageData, fileName)
-}
-
-public func generateNewFileName(_ prefix: String, _ ext: String) -> String {
-    let timestamp = Date().getFormattedDate("yyyyMMdd_HHmmss")
-    let fileName = uniqueCombine("\(prefix)_\(timestamp).\(ext)")
-    return fileName
-}
-
-extension Date {
-  func getFormattedDate(_ format: String) -> String {
-    let df = DateFormatter()
-      df.dateFormat = format
-      df.locale = Locale(identifier: "US")
-    return df.string(from: self)
-  }
-}
-
-private func saveFile(_ data: Data, _ fileName: String) -> String? {
+public func saveFile(_ data: Data, _ fileName: String) -> String? {
     let filePath = getAppFilePath(fileName)
     do {
         try data.write(to: filePath)
@@ -260,18 +177,6 @@ private func saveFile(_ data: Data, _ fileName: String) -> String? {
     }
 }
 
-private func uniqueCombine(_ fileName: String) -> String {
-    func tryCombine(_ fileName: String, _ n: Int) -> String {
-        let ns = fileName as NSString
-        let name = ns.deletingPathExtension
-        let ext = ns.pathExtension
-        let suffix = (n == 0) ? "" : "_\(n)"
-        let f = "\(name)\(suffix).\(ext)"
-        return (FileManager.default.fileExists(atPath: getAppFilePath(f).path)) ? tryCombine(fileName, n + 1) : f
-    }
-    return tryCombine(fileName, 0)
-}
-
 public func removeFile(_ fileName: String) {
     do {
         try FileManager.default.removeItem(atPath: getAppFilePath(fileName).path)
@@ -279,87 +184,3 @@ public func removeFile(_ fileName: String) {
         logger.error("FileUtils.removeFile error: \(error.localizedDescription)")
     }
 }
-
-// image utils
-
-public func dropImagePrefix(_ s: String) -> String {
-    dropPrefix(dropPrefix(s, "data:image/png;base64,"), "data:image/jpg;base64,")
-}
-
-private func dropPrefix(_ s: String, _ prefix: String) -> String {
-    s.hasPrefix(prefix) ? String(s.dropFirst(prefix.count)) : s
-}
-
-public func cropToSquare(_ image: UIImage) -> UIImage {
-    let size = image.size
-    let side = min(size.width, size.height)
-    let newSize = CGSize(width: side, height: side)
-    var origin = CGPoint.zero
-    if size.width > side {
-        origin.x -= (size.width - side) / 2
-    } else if size.height > side {
-        origin.y -= (size.height - side) / 2
-    }
-    return resizeImage(image, newBounds: CGRect(origin: .zero, size: newSize), drawIn: CGRect(origin: origin, size: size))
-}
-
-func resizeImageToDataSize(_ image: UIImage, maxDataSize: Int64) -> Data? {
-    var img = image
-    let usePng = image.hasAlpha()
-    var data = usePng ? img.pngData() : img.jpegData(compressionQuality: 0.85)
-    var dataSize = data?.count ?? 0
-    while dataSize != 0 && dataSize > maxDataSize {
-        let ratio = sqrt(Double(dataSize) / Double(maxDataSize))
-        let clippedRatio = min(ratio, 2.0)
-        img = reduceSize(img, ratio: clippedRatio)
-        data = usePng ? img.pngData() : img.jpegData(compressionQuality: 0.85)
-        dataSize = data?.count ?? 0
-    }
-    logger.debug("resizeImageToDataSize final \(dataSize)")
-    return data
-}
-
-public func resizeImageToStrSize(_ image: UIImage, maxDataSize: Int64) -> String? {
-    var img = image
-    var str = compressImageStr(img)
-    var dataSize = str?.count ?? 0
-    while dataSize != 0 && dataSize > maxDataSize {
-        let ratio = sqrt(Double(dataSize) / Double(maxDataSize))
-        let clippedRatio = min(ratio, 2.0)
-        img = reduceSize(img, ratio: clippedRatio)
-        str = compressImageStr(img)
-        dataSize = str?.count ?? 0
-    }
-    logger.debug("resizeImageToStrSize final \(dataSize)")
-    return str
-}
-
-func compressImageStr(_ image: UIImage, _ compressionQuality: CGFloat = 0.85) -> String? {
-    let ext = image.hasAlpha() ? "png" : "jpg"
-    if let data = image.hasAlpha() ? image.pngData() : image.jpegData(compressionQuality: compressionQuality) {
-        return "data:image/\(ext);base64,\(data.base64EncodedString())"
-    }
-    return nil
-}
-
-private func reduceSize(_ image: UIImage, ratio: CGFloat) -> UIImage {
-    let newSize = CGSize(width: floor(image.size.width / ratio), height: floor(image.size.height / ratio))
-    let bounds = CGRect(origin: .zero, size: newSize)
-    return resizeImage(image, newBounds: bounds, drawIn: bounds)
-}
-
-private func resizeImage(_ image: UIImage, newBounds: CGRect, drawIn: CGRect) -> UIImage {
-    let format = UIGraphicsImageRendererFormat()
-    format.scale = 1.0
-    format.opaque = !image.hasAlpha()
-    return UIGraphicsImageRenderer(bounds: newBounds, format: format).image { _ in
-        image.draw(in: drawIn)
-    }
-}
-
-extension UIImage {
-    func hasAlpha() -> Bool {
-        let alpha = cgImage?.alphaInfo
-        return alpha == .first || alpha == .last || alpha == .premultipliedFirst || alpha == .premultipliedLast || alpha == .alphaOnly
-    }
-}