feat(settings): apply the Import form from the phone and show results

Import group in the app settings; the processor runs after the first
frame and on settings changes, clears the fields, writes the status,
remembers form hashes and opens the results screen.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 150 insertions, 0 deletions

diff --git a/source/settings/SettingsProcessor.mc b/source/settings/SettingsProcessor.mc
new file mode 100644
index 0000000..4c0a429
--- /dev/null
+++ b/source/settings/SettingsProcessor.mc
@@ -0,0 +1,150 @@
+// Author:  cirakg & claude ai
+// Summary: Applies the phone's settings forms on the watch (README 10.3); in M5 the Import form.
+//
+// Rules (README 10.3):
+//   * Runs from onSettingsChanged and at every start, after the first frame.
+//   * A form is applied only when its switch ("Import now") is on. Afterwards
+//     the watch turns the switch off and clears the text fields (they hold
+//     secrets) and writes a short result to the status field.
+//   * Idempotency: a hash of every applied form is remembered (the last 32),
+//     so the same form sent again does nothing.
+//   * The import runs as a job on a timer; when it ends, the results are
+//     stored and the results screen opens.
+// Only the full app runs this, never the glance.
+
+import Toybox.Application;
+import Toybox.Lang;
+import Toybox.System;
+import Toybox.WatchUi;
+
+class SettingsProcessor {
+
+    static const TEXT_FIELDS = 8;
+    static const FORM_LOG_KEY = "fh";
+    static const FORM_LOG_SIZE = 32;
+    static const STATUS_MAX_CHARS = 200;
+
+    private var _job as Importer? = null;
+    // The job's timer driver (kept so it isn't collected while it runs).
+    var runner as Jobs.JobRunner? = null;
+    private var _formHash as String = "";
+    private var _startedAt as Number = 0;
+
+    function initialize() {
+    }
+
+    function isBusy() as Boolean {
+        return _job != null;
+    }
+
+    // "Importing… 40%" while an import runs, else null.
+    function busyText() as String? {
+        var job = _job;
+        return job != null ? "Importing… " + job.percent() + "%" : null;
+    }
+
+    // Look at the forms and start whatever they ask for.
+    function start() as Void {
+        if (_job != null || AppState.vault == null) {
+            return;
+        }
+        if (!isTrue(prop("impApply"))) {
+            return;
+        }
+        var mode = prop("impMode");
+        var locked = isTrue(prop("impLocked"));
+        var importMode = mode instanceof Number && mode >= Importer.MODE_APPEND && mode <= Importer.MODE_CANCEL ? mode : Importer.MODE_APPEND;
+        var vault = AppState.theVault();
+        if (importMode == Importer.MODE_CANCEL) {
+            ImportBuffer.clear(vault.storage());
+            finish(["Waiting import cancelled."], "Waiting import cancelled", false);
+            return;
+        }
+        var text = "";
+        for (var i = 1; i <= TEXT_FIELDS; i++) {
+            var part = prop("impText" + i);
+            if (part instanceof String) {
+                text += part;
+            }
+        }
+        _formHash = formHash(importMode + "|" + locked + "|" + text);
+        if (alreadyApplied(_formHash)) {
+            finish(["This import was already applied. Change the text to import again."], "Already imported", false);
+            return;
+        }
+        _startedAt = System.getTimer();
+        var job = new Importer(vault, text, importMode, locked, Clock.nowUnix(0));
+        _job = job;
+        var r = new Jobs.JobRunner(job, 1, method(:onImportDone));
+        runner = r;
+        r.start();
+        WatchUi.requestUpdate();
+    }
+
+    function onImportDone() as Void {
+        var job = _job as Importer;
+        _job = null;
+        runner = null;
+        var report = job.report;
+        Diag.importDone(report.imported, System.getTimer() - _startedAt);
+        if (report.failure == null && report.waitingChars < 0) {
+            rememberApplied(_formHash);
+        }
+        AppState.theCodes().clear();
+        finish(report.lines(), report.summary(), true);
+    }
+
+    // Clear the form, write the status, store and show the results.
+    private function finish(lines as Array<String>, status as String, clearText as Boolean) as Void {
+        if (clearText) {
+            for (var i = 1; i <= TEXT_FIELDS; i++) {
+                setProp("impText" + i, "");
+            }
+        }
+        setProp("impApply", false);
+        setProp("impStatus", Text.clip(status, STATUS_MAX_CHARS));
+        Results.save(lines);
+        WatchUi.pushView(new InfoView("Results", lines, "results"), new InfoDelegate(), WatchUi.SLIDE_UP);
+        Results.markSeen();
+    }
+
+    private function isTrue(value as Application.Properties.ValueType or Null) as Boolean {
+        return value instanceof Boolean && value;
+    }
+
+    private function prop(key as String) as Application.Properties.ValueType or Null {
+        try {
+            return Application.Properties.getValue(key);
+        } catch (e instanceof Lang.Exception) {
+            return null;
+        }
+    }
+
+    private function setProp(key as String, value as Application.Properties.ValueType) as Void {
+        try {
+            Application.Properties.setValue(key, value);
+        } catch (e instanceof Lang.Exception) {
+            // A property the phone hasn't got yet: nothing to clear.
+        }
+    }
+
+    // Short hash of a form's content (SHA-256, first 8 bytes, hex).
+    static function formHash(content as String) as String {
+        return Bytes.toHex(Hashes.digest(Hashes.SHA256, Bytes.fromUtf8(content)).slice(0, 8));
+    }
+
+    private function alreadyApplied(hash as String) as Boolean {
+        var log = Application.Storage.getValue(FORM_LOG_KEY);
+        return log instanceof Array && log.indexOf(hash) >= 0;
+    }
+
+    private function rememberApplied(hash as String) as Void {
+        var stored = Application.Storage.getValue(FORM_LOG_KEY);
+        var log = stored instanceof Array ? stored as Array<Application.Storage.ValueType> : [] as Array<Application.Storage.ValueType>;
+        log.add(hash);
+        if (log.size() > FORM_LOG_SIZE) {
+            log = log.slice(log.size() - FORM_LOG_SIZE, null) as Array<Application.Storage.ValueType>;
+        }
+        Application.Storage.setValue(FORM_LOG_KEY, log);
+    }
+}