实现我的 Tab、对齐 Android 流程并接入 OSS 上传

suixinkan/Core/Upload/UploadImageProcessors.swift

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+//
+//  UploadImageProcessors.swift
+//  suixinkan
+//
+
+import Foundation
+import UIKit
+import UniformTypeIdentifiers
+
+/// 头像图片处理器，负责压缩和规范化用户选择的头像图片。
+enum AvatarImageProcessor {
+    static let maxPixelLength: CGFloat = 1024
+    static let jpegCompressionQuality: CGFloat = 0.82
+
+    /// 处理后的上传图片实体，包含数据、文件名和内容类型。
+    struct ProcessedImage: Equatable {
+        let data: Data
+        let fileName: String
+        let contentType: UTType
+    }
+
+    /// 将原始图片数据转换为适合头像上传的 JPEG 数据。
+    static func process(data: Data, timestamp: TimeInterval = Date().timeIntervalSince1970) throws -> ProcessedImage {
+        try UploadImageRenderer.process(
+            data: data,
+            fileNamePrefix: "avatar",
+            maxPixelLength: maxPixelLength,
+            jpegCompressionQuality: jpegCompressionQuality,
+            timestamp: timestamp
+        )
+    }
+}
+
+/// 实名证件图片处理器，负责压缩和规范化身份证正反面图片。
+enum RealNameImageProcessor {
+    static let maxPixelLength: CGFloat = 1800
+    static let jpegCompressionQuality: CGFloat = 0.88
+
+    /// 将原始图片数据转换为适合实名认证上传的 JPEG 数据。
+    static func process(data: Data, side: RealNameImageSide, timestamp: TimeInterval = Date().timeIntervalSince1970) throws -> AvatarImageProcessor.ProcessedImage {
+        try UploadImageRenderer.process(
+            data: data,
+            fileNamePrefix: "real_name_\(side.rawValue)",
+            maxPixelLength: maxPixelLength,
+            jpegCompressionQuality: jpegCompressionQuality,
+            timestamp: timestamp
+        )
+    }
+}
+
+/// 银行卡图片处理器，负责压缩银行卡正反面图片。
+enum BankCardImageProcessor {
+    static let maxPixelLength: CGFloat = 1800
+    static let jpegCompressionQuality: CGFloat = 0.88
+
+    static func process(data: Data, side: BankCardImageSide, timestamp: TimeInterval = Date().timeIntervalSince1970) throws -> AvatarImageProcessor.ProcessedImage {
+        try UploadImageRenderer.process(
+            data: data,
+            fileNamePrefix: "bank_card_\(side.rawValue)",
+            maxPixelLength: maxPixelLength,
+            jpegCompressionQuality: jpegCompressionQuality,
+            timestamp: timestamp
+        )
+    }
+}
+
+/// 实名认证证件图片面向实体，区分人像面和国徽面。
+enum RealNameImageSide: String {
+    case front
+    case back
+}
+
+/// 银行卡图片面向实体。
+enum BankCardImageSide: String {
+    case front
+    case back
+}
+
+/// 上传图片处理错误实体，表示图片无效或编码失败。
+enum UploadImageProcessingError: LocalizedError, Equatable {
+    case invalidImage
+    case encodingFailed
+
+    var errorDescription: String? {
+        switch self {
+        case .invalidImage:
+            "请选择有效的图片"
+        case .encodingFailed:
+            "图片处理失败，请重新选择"
+        }
+    }
+}
+
+/// 上传图片渲染器，提供通用图片缩放、铺底和 JPEG 编码能力。
+private enum UploadImageRenderer {
+    static func process(
+        data: Data,
+        fileNamePrefix: String,
+        maxPixelLength: CGFloat,
+        jpegCompressionQuality: CGFloat,
+        timestamp: TimeInterval
+    ) throws -> AvatarImageProcessor.ProcessedImage {
+        guard let image = UIImage(data: data), image.size.width > 0, image.size.height > 0 else {
+            throw UploadImageProcessingError.invalidImage
+        }
+
+        let normalized = image.normalizedForUpload(maxPixelLength: maxPixelLength)
+        guard let jpegData = normalized.jpegData(compressionQuality: jpegCompressionQuality), !jpegData.isEmpty else {
+            throw UploadImageProcessingError.encodingFailed
+        }
+
+        return AvatarImageProcessor.ProcessedImage(
+            data: jpegData,
+            fileName: "\(fileNamePrefix)_\(Int(timestamp)).jpg",
+            contentType: .jpeg
+        )
+    }
+}
+
+private extension UIImage {
+    func normalizedForUpload(maxPixelLength: CGFloat) -> UIImage {
+        let longestSide = max(size.width, size.height)
+        let scale = min(1, maxPixelLength / longestSide)
+        let targetSize = CGSize(
+            width: max(1, (size.width * scale).rounded()),
+            height: max(1, (size.height * scale).rounded())
+        )
+
+        let format = UIGraphicsImageRendererFormat.default()
+        format.scale = 1
+        format.opaque = true
+        let renderer = UIGraphicsImageRenderer(size: targetSize, format: format)
+        return renderer.image { context in
+            UIColor.white.setFill()
+            context.fill(CGRect(origin: .zero, size: targetSize))
+            draw(in: CGRect(origin: .zero, size: targetSize))
+        }
+    }
+}