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regenerate something when the sentences changed

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This commit is contained in:
Shuming Liu
2026-10-03 21:12:12 +08:00
parent d5609c5c42
commit 4fd0fd36a4
11 changed files with 245 additions and 13 deletions
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20
ios/OralTrainer/Services/SentenceExplanationStore.swift
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@@ -33,11 +33,31 @@ final class SentenceExplanationStore {
}
}
func sync(mediaId: String, sentences: [SentenceBoundary]) {
guard !sentences.isEmpty else { return }
let directory = root.appendingPathComponent(Self.sanitize(mediaId), isDirectory: true)
let revision = Self.revision(for: sentences)
let marker = directory.appendingPathComponent("revision.txt")
let previous = (try? String(contentsOf: marker, encoding: .utf8))?
.trimmingCharacters(in: .whitespacesAndNewlines) ?? ""
guard previous != revision else { return }
try? FileManager.default.removeItem(at: directory)
try? FileManager.default.createDirectory(at: directory, withIntermediateDirectories: true)
try? revision.write(to: marker, atomically: true, encoding: .utf8)
}
private func fileURL(mediaId: String, sentenceIndex: Int) -> URL {
let directory = root.appendingPathComponent(Self.sanitize(mediaId), isDirectory: true)
return directory.appendingPathComponent("\(sentenceIndex).txt")
}
static func revision(for sentences: [SentenceBoundary]) -> String {
sentences.map { sentence in
let text = (sentence.text ?? "").trimmingCharacters(in: .whitespacesAndNewlines)
return "\(sentence.index)\t\(text)"
}.joined(separator: "\n")
}
static func sanitize(_ mediaId: String) -> String {
let allowed = CharacterSet.alphanumerics.union(CharacterSet(charactersIn: "._-"))
let filtered = mediaId.lowercased().unicodeScalars.map { allowed.contains($0) ? Character($0) : "_" }