タグ: Spotlight

// インデックス作成
func searchableItem(from entry: DiaryEntry) -> CSSearchableItem {
    let attributeSet = CSSearchableItemAttributeSet(contentType: UTType.content)
    attributeSet.contentType = UTType.text.identifier
    attributeSet.title = entry.title
    attributeSet.textContent = entry.content
    attributeSet.recordingDate = entry.date
    
    let item = CSSearchableItem(
        uniqueIdentifier: "\(entry.date.timeIntervalSince1970)",
        domainIdentifier: domainIdentifier,
        attributeSet: attributeSet
    )
    return item
}

let index = CSSearchableIndex(name: "example")
let items = diaryEntries.map { searchableItem(from: $0) }
do {
    try await index.indexSearchableItems(items)
} catch {
    // error handling
}

// 検索
func buildQuery(with keywords: [String]) -> String {
    // refer to: 
    // Searching for information in your app | Apple Developer Documentation
    // https://developer.apple.com/documentation/corespotlight/searching-for-information-in-your-app
    let perWordQueries: [String] = keywords.map { word in
        let v = "\"*\(word)*\"c" //大文字小文字を無視
        return "(title == \(v)) || (textContent == \(v)))"
    }
    return perWordQueries.count > 1
        ? "(" + perWordClauses.joined(separator: ") && (") + ")"
        : perWordClauses.first ?? ""
}

let searchQuery = buildQuery(with: keywords)
let context = CSSearchQueryContext()
context.fetchAttributes = ["title", "textContent"]
let query = CSSearchQuery(
    queryString: searchQuery,
    queryContext: context
)
var results: [CSSearchableItem] = []
query.foundItemsHandler = { items in
    // `items` is hit results
    results += items
}
query.completionHandler = { error in
    // completion handling
    print(results)
}