feat: add daily fiat and crypto currency conversion

2026-10-13 21:31:14 +02:00
parent a57cbc219c
commit d3f9ec92d7
5 changed files with 459 additions and 13 deletions
@@ -13,6 +13,12 @@ final class LauncherWindowController: NSWindowController, NSWindowDelegate, NSSe
    private var applications: [Application] = []
    private var results: [Application] = []
    private var calculation: CalculatorResult?
+    private var isCurrencyCalculation = false
+    private var currencyRates: CurrencyRates?
+    private var currencyFetchedAt: Date?
+    private var currencyTask: Task<Void, Never>?
+    private var currencyError: String?
+    private var currencyFailureQuery: String?
    private var locationLabels: [URL: String] = [:]
    private var discoveryTask: Task<Void, Never>?
    private var isLaunching = false
@@ -73,6 +79,10 @@ final class LauncherWindowController: NSWindowController, NSWindowDelegate, NSSe
        fatalError("Conjure creates its window programmatically")
    }

+    deinit {
+        currencyTask?.cancel()
+    }
+
    func present() {
        if launcherFrameBeforeReview != nil {
            showWindow(nil)
@@ -181,7 +191,7 @@ final class LauncherWindowController: NSWindowController, NSWindowDelegate, NSSe
        let searchFont = NSFont.systemFont(ofSize: 20)
        searchField.font = searchFont
        searchField.placeholderAttributedString = NSAttributedString(
-            string: "Search apps, calculate, or convert units…",
+            string: "Search apps, calculate, or convert…",
            attributes: [.foregroundColor: SunsetPalette.secondaryText, .font: searchFont]
        )
        searchField.textColor = SunsetPalette.text
@@ -195,7 +205,7 @@ final class LauncherWindowController: NSWindowController, NSWindowDelegate, NSSe
        searchField.sendsSearchStringImmediately = true
        searchField.sendsWholeSearchString = false
        searchField.delegate = self
-        searchField.setAccessibilityLabel("Search applications, calculate, or convert units")
+        searchField.setAccessibilityLabel("Search applications, calculate, or convert units and currencies")

        let symbol = NSImageView()
        symbol.image = NSImage(systemSymbolName: "sparkles", accessibilityDescription: nil)
@@ -348,6 +358,28 @@ final class LauncherWindowController: NSWindowController, NSWindowDelegate, NSSe
        }
    }

+    private func refreshCurrencyRates() {
+        guard currencyTask == nil else { return }
+        currencyTask = Task { [weak self] in
+            let result: Result<CurrencyRates, any Error>
+            do { result = .success(try await CurrencyAPI.fetch()) }
+            catch { result = .failure(error) }
+            guard !Task.isCancelled, let self else { return }
+            self.currencyTask = nil
+            switch result {
+            case .success(let rates):
+                self.currencyRates = rates
+                self.currencyFetchedAt = Date()
+                self.currencyError = nil
+                self.currencyFailureQuery = nil
+            case .failure(let error):
+                self.currencyError = error.localizedDescription
+                self.currencyFailureQuery = self.searchField.stringValue
+            }
+            self.updateResults(preservingSelection: true, allowingCurrencyFetch: false)
+        }
+    }
+
    private func updateLocationLabels() {
        var nameCounts: [String: Int] = [:]
        nameCounts.reserveCapacity(applications.count)
@@ -370,10 +402,37 @@ final class LauncherWindowController: NSWindowController, NSWindowDelegate, NSSe
        }
    }

-    private func updateResults(preservingSelection: Bool = false) {
+    private func updateResults(preservingSelection: Bool = false, allowingCurrencyFetch: Bool = true) {
        let selectedURL = preservingSelection && results.indices.contains(tableView.selectedRow)
            ? results[tableView.selectedRow].id : nil
-        calculation = Calculator.evaluate(searchField.stringValue)
+        let query = searchField.stringValue
+        if currencyFailureQuery != query {
+            currencyError = nil
+            currencyFailureQuery = nil
+        }
+        isCurrencyCalculation = Calculator.isCurrencyQuery(query, currencyRates: currencyRates)
+        let needsCurrencyRefresh = isCurrencyCalculation && (currencyFetchedAt.map {
+            !Calendar.current.isDate($0, inSameDayAs: Date())
+        } ?? true)
+        if allowingCurrencyFetch, needsCurrencyRefresh, currencyError == nil {
+            refreshCurrencyRates()
+        }
+        calculation = Calculator.evaluate(query, currencyRates: currencyRates)
+        if isCurrencyCalculation, let currencyError {
+            let cached = currencyRates.map { " Cached snapshot \($0.date) is not used." } ?? ""
+            calculation = CalculatorResult(
+                displayValue: "Currency rates unavailable", copyValue: nil,
+                detail: "Daily rates: \(currencyError). Change the query to retry.\(cached)"
+            )
+        } else if isCurrencyCalculation, currencyRates != nil, let answer = calculation {
+            let cacheStatus = needsCurrencyRefresh
+                ? (currencyTask == nil ? "Stale cached daily rates" : "Stale cache; refreshing daily rates…")
+                : "Cached daily rates"
+            calculation = CalculatorResult(
+                displayValue: answer.displayValue, copyValue: answer.copyValue,
+                detail: "\(answer.detail) · \(cacheStatus)"
+            )
+        }
        if calculation != nil {
            results = []
        } else if searchField.stringValue.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
@@ -381,8 +440,10 @@ final class LauncherWindowController: NSWindowController, NSWindowDelegate, NSSe
        } else {
            results = history.results(for: searchField.stringValue, in: applications)
        }
-        sectionLabel.stringValue = calculation == nil ? "Applications" : "Calculator"
-        tableView.setAccessibilityLabel(calculation == nil ? "Applications" : "Calculator result")
+        sectionLabel.stringValue = isCurrencyCalculation ? "Daily currency rates"
+            : calculation == nil ? "Applications" : "Calculator"
+        tableView.setAccessibilityLabel(isCurrencyCalculation ? "Daily currency conversion result"
+            : calculation == nil ? "Applications" : "Calculator result")
        tableView.reloadData()
        if resultCount > 0 {
            let row = selectedURL.flatMap { url in results.firstIndex { $0.id == url } } ?? 0
@@ -457,7 +518,8 @@ final class LauncherWindowController: NSWindowController, NSWindowDelegate, NSSe
        if let calculation {
            cell.textField?.stringValue = calculation.displayValue
            cell.locationLabel.isHidden = true
-            cell.kindLabel.stringValue = calculation.copyValue == nil ? "Error" : "Calculator"
+            cell.kindLabel.stringValue = isCurrencyCalculation ? "Daily rates"
+                : calculation.copyValue == nil ? "Error" : "Calculator"
            cell.imageView?.image = NSImage(systemSymbolName: "equal", accessibilityDescription: nil)?
                .withSymbolConfiguration(.init(pointSize: LauncherRowView.iconSize, weight: .regular))
            cell.imageView?.contentTintColor = SunsetPalette.accent