31 lines
1.4 KiB
Swift
31 lines
1.4 KiB
Swift
import Foundation
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enum FolderImportSource {
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static func validate(_ sources: [URL]) throws -> URL {
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guard sources.count == 1, let source = sources.first else {
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throw ValidationFailure(message: "请一次拖入一个材料根文件夹，不要同时拖入多个文件夹或文件。")
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}
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guard source.isFileURL else {
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throw ValidationFailure(message: "请从访达拖入本机材料文件夹，不支持网页链接。")
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}
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let values: URLResourceValues
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do {
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values = try source.resourceValues(forKeys: [.isDirectoryKey, .isPackageKey, .isReadableKey])
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} catch {
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throw ValidationFailure(message: "无法读取这个文件夹，请确认它仍然存在，或使用“选择文件夹”重新授权。")
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}
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guard values.isDirectory == true, values.isPackage != true else {
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throw ValidationFailure(message: "请拖入包含“发票”“付款截图”“实物照片”子目录的材料根文件夹，而不是单个文件或应用程序。")
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}
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guard values.isReadable == true else {
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throw ValidationFailure(message: "没有读取这个文件夹的权限，请使用“选择文件夹”重新授权。")
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}
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return source
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}
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private struct ValidationFailure: LocalizedError {
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let message: String
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var errorDescription: String? { message }
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}
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}
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