Files
PilotVault/Fly App/lib/fly/safety_gate.dart
T
tajniak81andClaude Opus 5.5 e02bb0e5cd Give the Fly App GO 4-style obstacle radar, on-screen sticks, AirSense and fly zones
Vision radar: graded obstacle sectors around the centre of the video,
the nearest distance per side, the obstacle overhead, and BLOCKED on a
side whose sensors cannot see once the motors run. On aircraft with 360°
sensing, sides without their own readings are filled from the
perception ring. The same sectors sit on the attitude ball's rim, turned
by the heading. Settings > Vision gains Display radar chart and the
braking / sensing distances per direction.

On-screen sticks: the rail's STICKS button hands the aircraft to two
stick pads after a slide-to-confirm. The 25 Hz stream runs natively and
sends zeros once Dart's last command is 300 ms old, so a stalled UI
leaves the aircraft hovering. The sticks close when the remote takes
over, on RTH or on landing. They are simulator-only on aircraft with a
remote unless Settings > General > Developer allows real flights; Spark
and Mavic Air on Wi-Fi may fly them for real. Which MSDK axis is forward
in velocity + body mode is coded from DJI's documentation and must be
checked in the simulator first.

AirSense: a banner for manned aircraft at warning level 2 and up, with
distance, direction and ICAO code; the planes on the map; the full list
in a sheet and Settings > Safety; and the aircraft's own avoidance
action with its countdown.

Fly zones: DJI GEO zones around the aircraft (or the phone) on the map
with their height limits, a banner for FlySafe notices and in/near-zone
states, take-off refused in restricted and locked authorization zones,
self-unlock of authorization zones, the aircraft's licences (enable,
sync from the DJI account, remove all; ground only), and the GEO
database version with an update button.

Tested with unit and widget tests and screenshot renders only; nothing
has run on an aircraft or the simulator yet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-20 21:14:12 +02:00

801 lines
38 KiB
Dart
Raw Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
import 'dart:ui' show Offset, Rect;
import 'package:flutter/foundation.dart';
import 'package:latlong2/latlong.dart' show LatLng;
import '../dji_service.dart';
import '../flight_model.dart';
import 'action_rail_state.dart';
import 'calibration.dart';
import 'flight_status.dart';
import 'fly_prefs.dart';
import 'hud_geometry.dart';
import 'modes/vision_modes.dart';
import 'modes/waypoint_mission.dart';
import 'product_profile.dart';
import 'state/aircraft_state.dart';
import 'state/alert_state.dart';
import 'state/fly_zone_state.dart';
import 'state/mission_state.dart';
import 'virtual_sticks.dart';
export 'action_rail_state.dart' show FlightCommand;
/// How hard a precondition stops a command.
enum CheckLevel {
/// Shown on the confirm dialog; the pilot may still slide.
warn,
/// The command is refused; the dialog says why and has no slider.
block,
}
@immutable
class GateCheck {
const GateCheck(this.level, this.message);
const GateCheck.warn(this.message) : level = CheckLevel.warn;
const GateCheck.block(this.message) : level = CheckLevel.block;
final CheckLevel level;
final String message;
bool get blocks => level == CheckLevel.block;
@override
bool operator ==(Object other) => other is GateCheck && other.level == level && other.message == message;
@override
int get hashCode => Object.hash(level, message);
@override
String toString() => '${level.name}: $message';
}
/// What [SafetyGate.check] found for one command.
@immutable
class GateVerdict {
const GateVerdict(this.command, this.checks);
final FlightCommand command;
final List<GateCheck> checks;
bool get allowed => !checks.any((GateCheck c) => c.blocks);
List<GateCheck> get blockers => <GateCheck>[for (final GateCheck c in checks) if (c.blocks) c];
List<GateCheck> get warnings => <GateCheck>[for (final GateCheck c in checks) if (!c.blocks) c];
}
/// Thrown by [SafetyGate.run] when a command's preconditions fail at the
/// moment it would be sent (the state may have moved on since the dialog).
class SafetyGateRefused implements Exception {
const SafetyGateRefused(this.verdict);
final GateVerdict verdict;
@override
String toString() => verdict.blockers.map((GateCheck c) => c.message).join(' ');
}
/// Thrown by [SafetyGate.runMaintenance] when a calibration may not start.
class MaintenanceRefused implements Exception {
const MaintenanceRefused(this.checks);
final List<GateCheck> checks;
@override
String toString() => checks.where((GateCheck c) => c.blocks).map((GateCheck c) => c.message).join(' ');
}
/// Thrown by the mission methods of [SafetyGate] when a mission may not start or go on.
class MissionRefused implements Exception {
const MissionRefused(this.checks);
final List<GateCheck> checks;
@override
String toString() => checks.where((GateCheck c) => c.blocks).map((GateCheck c) => c.message).join(' ');
}
/// The one place every aircraft-moving command passes through (plan §1.5, P3).
///
/// [check] grades the preconditions — connected, flight state, GPS, battery,
/// live faults — into blockers and warnings for the slide-to-confirm dialog;
/// [run] re-checks and then sends the command. The UI never calls the
/// `DjiService` flight commands directly, so this class is what the safety
/// tests pin down.
class SafetyGate {
SafetyGate({required this.model, required this.dji});
final FlightModel model;
final DjiService dji;
/// RTH altitude limits the flight controller accepts (MSDK `setGoHomeHeightInMeters`).
static const int minRthHeight = 20;
static const int maxRthHeight = 500;
/// Below this RTH altitude the dialog warns about obstacles on the way home.
static const int lowRthHeight = 30;
/// How far the pilot must be from the home point before RTH asks where to go.
static const double rthTargetChoiceDistance = 30;
AircraftState get _a => model.aircraft;
GateVerdict check(FlightCommand command) {
final List<GateCheck> checks = <GateCheck>[];
if (!model.connected) {
checks.add(const GateCheck.block('No aircraft connected.'));
return GateVerdict(command, checks);
}
if (_a.updatedAt == null) {
checks.add(const GateCheck.block('Waiting for the flight controller to report.'));
return GateVerdict(command, checks);
}
switch (command) {
case FlightCommand.takeOff:
_takeOff(checks);
case FlightCommand.land:
if (_a.isFlying != true) checks.add(const GateCheck.block('The aircraft is not flying.'));
if (_a.goingHome == true) checks.add(const GateCheck.warn('This ends Return to Home and lands where the aircraft is now.'));
case FlightCommand.cancelLanding:
if (_a.flightModeEnum != 'AUTO_LANDING') checks.add(const GateCheck.block('The aircraft is not landing.'));
case FlightCommand.confirmLanding:
if (_a.landingConfirmationNeeded != true && _a.flightModeEnum != 'CONFIRM_LANDING') {
checks.add(const GateCheck.block('The aircraft is not waiting for a landing confirmation.'));
}
case FlightCommand.goHome:
_goHome(checks);
case FlightCommand.cancelGoHome:
if (_a.goingHome != true && _a.flightModeEnum != 'GO_HOME') {
checks.add(const GateCheck.block('The aircraft is not returning to home.'));
}
case FlightCommand.stopMode:
switch (RailState.activeMode(_a, model.mission)) {
case ActiveMode.none:
checks.add(const GateCheck.block('No intelligent flight mode is running.'));
case ActiveMode.other:
checks.add(const GateCheck.block('This mode cannot be stopped from the app yet. Press the pause button on the remote.'));
case ActiveMode.waypoint:
case ActiveMode.activeTrack:
case ActiveMode.tapFly:
break;
}
}
return GateVerdict(command, checks);
}
void _takeOff(List<GateCheck> checks) {
if (_a.isFlying == true) {
checks.add(const GateCheck.block('The aircraft is already flying.'));
return;
}
final int? percent = model.battery.percent;
final int critical = model.battery.seriousLowWarningThreshold ?? 15;
final int low = model.battery.lowWarningThreshold ?? 30;
if (_a.seriousLowBattery == true || (percent != null && percent <= critical)) {
checks.add(GateCheck.block('Battery critically low${percent == null ? '' : ' ($percent%)'}. Replace or charge it.'));
} else if (_a.lowBattery == true || (percent != null && percent <= low)) {
checks.add(GateCheck.warn('Battery low${percent == null ? '' : ' ($percent%)'}: a short flight only.'));
}
if (_a.imuPreheating == true) checks.add(const GateCheck.block('IMU is warming up. Wait until it is ready.'));
if (_a.compassCalibrating == true) checks.add(const GateCheck.block('Compass calibration is in progress.'));
if (_a.compassHasError == true) checks.add(const GateCheck.block('Compass error. Calibrate the compass or move away from metal.'));
// Faults the aircraft itself reports: critical ones refuse, the worst warning is shown.
final Iterable<DiagnosticAlert> faults = model.alerts.all.where((DiagnosticAlert d) => d.severity == AlertSeverity.critical);
for (final DiagnosticAlert d in faults.take(2)) {
checks.add(GateCheck.block(d.reason));
}
final bool gps = (_a.gpsSignalLevel ?? 0) >= FlightStatus.minGpsLevel;
if (!gps) {
checks.add(GateCheck.warn(_a.visionPositioningBeingUsed == true
? 'Weak GPS: the aircraft holds position by vision only, low over textured ground.'
: 'Weak GPS: the aircraft will fly in ATTI mode and drift with the wind.'));
}
if (_a.homeLocationSet != true) {
checks.add(const GateCheck.warn('No home point recorded yet: Return to Home will not be available.'));
}
for (final DiagnosticAlert d in model.alerts.all.where((DiagnosticAlert d) => d.severity == AlertSeverity.warning).take(1)) {
checks.add(GateCheck.warn(d.reason));
}
if (model.profile.hasCamera && model.camera.storage != null && !model.camera.storage!.usable) {
checks.add(GateCheck.warn('${model.camera.storage!.status}: photos and video will not be saved.'));
}
_flyZone(checks);
}
// ── Fly zones (plan P8) ─────────────────────────────────────────────────────
/// DJI's GEO system refuses take-off in restricted and locked authorization
/// zones on its own; saying so here keeps the slider from promising otherwise.
void _flyZone(List<GateCheck> checks) {
final FlyZoneState z = model.flyZones;
switch (z.state) {
case 'IN_RESTRICTED_ZONE':
case 'SUSPECTED_IN_RESTRICTED_ZONE':
checks.add(const GateCheck.block('The aircraft is in a restricted zone: take-off is not allowed here.'));
case 'IN_AUTHORIZED_ZONE':
case 'SUSPECTED_IN_AUTHORIZED_ZONE':
checks.add(const GateCheck.block('Authorization zone: unlock it first (Settings → Safety → Fly zones).'));
case 'IN_ENHANCE_WARNING_ZONE':
checks.add(const GateCheck.warn('Enhanced warning zone: check local rules before flying.'));
case 'IN_WARNING_ZONE':
checks.add(const GateCheck.warn('Warning zone: check local rules before flying.'));
case 'IN_WARNING_ZONE_WITH_HEIGHT_LIMITATION':
case 'SUSPECTED_IN_WARNING_ZONE_WITH_HEIGHT_LIMITATION':
checks.add(const GateCheck.warn('Height-limited zone: the aircraft will not climb above the zone\'s limit.'));
}
}
/// Switching or removing licences changes what the flight controller lets the
/// aircraft do, so it happens on the ground only.
List<GateCheck> checkLicenceChange() => <GateCheck>[
if (!model.connected) const GateCheck.block('Connect the aircraft to change its licences.'),
if (model.connected && _a.isFlying == true) const GateCheck.block('Land before changing licences.'),
];
Future<void> _licences(Future<void> Function() change) async {
final List<GateCheck> checks = checkLicenceChange();
if (checks.any((GateCheck c) => c.blocks)) throw MissionRefused(checks);
await change();
try {
model.flyZones.applyLicences(await dji.getFlyZoneLicences());
} catch (_) {
// The list refreshes on the next connection.
}
}
/// Enables [licence] (the aircraft keeps one enabled at a time) or disables it.
Future<void> setLicenceEnabled(FlyZoneLicence licence, bool enabled) async {
if (enabled && licence.expired) throw const MissionRefused(<GateCheck>[GateCheck.block('This licence has expired.')]);
await _licences(() => dji.setFlyZoneLicenceEnabled(licence.id, enabled));
}
/// Fetches the DJI account's licences and writes them to the aircraft.
Future<void> syncLicences() => _licences(dji.syncFlyZoneLicences);
/// Removes every licence from the aircraft.
Future<void> deleteAllLicences() => _licences(dji.deleteAllFlyZoneLicences);
/// Downloads the basic GEO database; the database state refreshes when it ends.
Future<void> upgradeFlyZoneDatabase() async {
model.flyZones.applyUpgradeProgress(0);
try {
await dji.startFlyZoneDatabaseUpgrade();
} finally {
model.flyZones.applyUpgradeProgress(null);
try {
model.flyZones.applyDatabase(await dji.getFlyZoneDatabase());
} catch (_) {
// Keeps the last known state.
}
}
}
Future<void> cancelFlyZoneDatabaseUpgrade() async {
await dji.stopFlyZoneDatabaseUpgrade();
model.flyZones.applyUpgradeProgress(null);
}
/// Self-unlocks an authorization zone (DJI account required). Unlocking is
/// the pilot declaring they may fly there, so the UI confirms it first.
Future<void> unlockFlyZone(FlyZone zone) async {
if (!zone.unlockable) throw const MissionRefused(<GateCheck>[GateCheck.block('Only authorization zones can be self-unlocked.')]);
if (!model.connected) throw const MissionRefused(<GateCheck>[GateCheck.block('Connect the aircraft to unlock a zone for it.')]);
await dji.unlockAuthorizationFlyZone(zone.id);
try {
model.flyZones.applyUnlocked(<int>{...model.flyZones.unlocked, ...await dji.getUnlockedFlyZones()});
} catch (_) {
model.flyZones.applyUnlocked(<int>{...model.flyZones.unlocked, zone.id});
}
}
void _goHome(List<GateCheck> checks) {
if (_a.isFlying != true) {
checks.add(const GateCheck.block('The aircraft is not flying.'));
return;
}
if (_a.goingHome == true) {
checks.add(const GateCheck.block('The aircraft is already returning to home.'));
return;
}
if (_a.homeLocationSet != true) {
checks.add(const GateCheck.block('No home point recorded. Fly back manually.'));
}
if ((_a.gpsSignalLevel ?? 0) < FlightStatus.minGpsLevel) {
checks.add(const GateCheck.block('GPS too weak for Return to Home. Fly back manually.'));
}
final int? percent = model.battery.percent;
final int? needed = _a.goHome?.batteryNeededToGoHome;
if (percent != null && needed != null && needed > 0 && percent < needed) {
checks.add(GateCheck.warn('Battery ($percent%) is below what the trip home needs ($needed%). It may land on the way.'));
}
final double? h = _a.goHomeHeight;
if (h != null && h < lowRthHeight && !model.profile.hasObstacleSensing) {
checks.add(GateCheck.warn('RTH altitude is ${h.round()} m and this aircraft cannot see obstacles.'));
}
}
// ── Calibration & maintenance (plan P6b) ────────────────────────────────────
/// Below this charge an IMU calibration (5–10 minutes) is discouraged.
static const int imuMinBattery = 30;
/// Preconditions for starting [kind]. Everything except the center-of-gravity
/// calibration (done in a hover) and the gimbal trim needs the aircraft on
/// the ground with the motors off.
List<GateCheck> checkMaintenance(CalibrationKind kind) {
final List<GateCheck> checks = <GateCheck>[];
if (kind == CalibrationKind.visionSensors) return checks;
if (!model.connected) return checks..add(const GateCheck.block('No aircraft connected.'));
if (_a.updatedAt == null) return checks..add(const GateCheck.block('Waiting for the flight controller to report.'));
switch (kind) {
case CalibrationKind.gimbalAdjust:
case CalibrationKind.visionSensors:
break;
case CalibrationKind.gravityCenter:
if (_a.isFlying != true) checks.add(const GateCheck.block('Take off and hover first: the aircraft measures its balance in the air.'));
if ((_a.gpsSignalLevel ?? 0) < FlightStatus.minGpsLevel) checks.add(const GateCheck.block('GPS too weak to hold a steady hover.'));
if (_a.windWarning != null && _a.windWarning != 'LEVEL_0') checks.add(const GateCheck.warn('Strong wind: the result may be off.'));
default:
if (_a.isFlying == true) {
checks.add(const GateCheck.block('Land first.'));
} else if (_a.motorsOn == true) {
checks.add(const GateCheck.block('Stop the motors first.'));
}
}
switch (kind) {
case CalibrationKind.imu:
final int? percent = model.battery.percent;
if (percent != null && percent < imuMinBattery) checks.add(GateCheck.warn('Battery at $percent%: calibration takes up to 10 minutes.'));
if (_a.imuPreheating == true) checks.add(const GateCheck.warn('The IMU is warming up; calibration waits for it.'));
case CalibrationKind.compass:
if (_a.compassCalibrating == true) checks.add(const GateCheck.warn('A compass calibration is already running; starting restarts it.'));
case CalibrationKind.gimbal:
if (model.gimbal.calibrating) checks.add(const GateCheck.block('The gimbal is already calibrating.'));
case CalibrationKind.propeller:
checks.add(const GateCheck.warn('The motors spin during calibration. Keep clear of the propellers.'));
case CalibrationKind.sensorCleaning:
case CalibrationKind.lens:
if (model.camera.isRecording) checks.add(const GateCheck.block('Stop recording first.'));
default:
break;
}
return checks;
}
/// Re-checks [kind] and runs [start] — the wizard's start command.
Future<void> runMaintenance(CalibrationKind kind, Future<void> Function() start) async {
final List<GateCheck> checks = checkMaintenance(kind);
if (checks.any((GateCheck c) => c.blocks)) throw MaintenanceRefused(checks);
await start();
}
// ── Intelligent flight modes (plan P7) ──────────────────────────────────────
/// Beyond this the pre-start check points out the trip to waypoint 1.
static const double farFirstWaypoint = 500;
/// The aircraft's own limits for [WaypointMissionSpec.validate], read from
/// the flight controller (they are not in the telemetry tick).
Future<MissionLimits> missionLimits() async {
Future<Object?> read(String key) async {
if (!model.connected) return null;
try {
return await dji.getKey(DjiKey.flightController(key));
} catch (_) {
return null;
}
}
final List<Object?> v = await Future.wait(<Future<Object?>>[
read('MAX_FLIGHT_HEIGHT'),
read('MAX_FLIGHT_RADIUS'),
read('MAX_FLIGHT_RADIUS_ENABLED'),
]);
final double? lat = _a.homeLatitude, lon = _a.homeLongitude;
final bool radiusOn = v[2] == true;
return MissionLimits(
maxAltitude: (v[0] as num?)?.toDouble(),
maxRadius: radiusOn ? (v[1] as num?)?.toDouble() : null,
home: lat == null || lon == null || _a.homeLocationSet == false ? null : LatLng(lat, lon),
gimbalMin: model.profile.gimbal?.pitch?.min ?? -90,
gimbalMax: model.profile.gimbal?.pitch?.max ?? 30,
);
}
/// Preconditions for flying [spec]: the aircraft's state, the operator's,
/// and the route's own [WaypointMissionSpec.validate] issues.
List<GateCheck> checkWaypointStart(WaypointMissionSpec spec, [MissionLimits limits = const MissionLimits()]) {
final List<GateCheck> checks = <GateCheck>[];
if (!model.connected) return checks..add(const GateCheck.block('No aircraft connected.'));
if (_a.updatedAt == null) return checks..add(const GateCheck.block('Waiting for the flight controller to report.'));
final WaypointProgress op = model.mission.waypoint;
if (op.unsupported) {
checks.add(const GateCheck.block('This aircraft cannot fly waypoint missions.'));
} else if (op.active) {
checks.add(const GateCheck.block('A waypoint mission is already running.'));
} else if (op.uploading) {
checks.add(const GateCheck.block('A mission is still uploading.'));
} else if (op.state == 'DISCONNECTED' || op.state == 'RECOVERING') {
checks.add(const GateCheck.block('The mission system is not ready yet. Wait a moment.'));
}
if (model.mission.tracking) checks.add(const GateCheck.block('Stop ActiveTrack first.'));
for (final MissionIssue i in spec.validate(limits)) {
checks.add(i.blocks ? GateCheck.block(i.message) : GateCheck.warn(i.message));
}
final String mode = _a.flightModeEnum ?? '';
if (_a.goingHome == true || mode == 'GO_HOME') checks.add(const GateCheck.block('Cancel Return to Home first.'));
if (mode == 'AUTO_LANDING' || mode == 'CONFIRM_LANDING') checks.add(const GateCheck.block('The aircraft is landing.'));
if ((_a.gpsSignalLevel ?? 0) < FlightStatus.minGpsLevel) {
checks.add(const GateCheck.block('GPS too weak for a waypoint mission.'));
}
if (_a.homeLocationSet != true) checks.add(const GateCheck.block('No home point recorded yet.'));
final int? percent = model.battery.percent;
final int critical = model.battery.seriousLowWarningThreshold ?? 15;
final int low = model.battery.lowWarningThreshold ?? 30;
if (_a.seriousLowBattery == true || (percent != null && percent <= critical)) {
checks.add(GateCheck.block('Battery critically low${percent == null ? '' : ' ($percent%)'}.'));
} else if (_a.lowBattery == true || (percent != null && percent <= low)) {
checks.add(GateCheck.warn('Battery low${percent == null ? '' : ' ($percent%)'}: the route may not finish.'));
}
final int? left = _a.goHome?.remainingFlightTime;
final int needed = spec.estimatedSeconds + (_a.goHome?.timeNeededToGoHome ?? 0);
if (left != null && left > 0 && spec.points.length >= 2 && needed > left) {
checks.add(GateCheck.warn('The route takes about ${formatDuration(spec.estimatedSeconds)}; '
'the battery has about ${formatDuration(left)} of flight left.'));
}
if (_a.isFlying != true) {
if (_a.imuPreheating == true) checks.add(const GateCheck.block('IMU is warming up. Wait until it is ready.'));
if (_a.compassCalibrating == true) checks.add(const GateCheck.block('Compass calibration is in progress.'));
for (final DiagnosticAlert d in model.alerts.all.where((DiagnosticAlert d) => d.severity == AlertSeverity.critical).take(2)) {
checks.add(GateCheck.block(d.reason));
}
checks.add(const GateCheck.warn('The aircraft takes off and flies to waypoint 1 on its own.'));
}
if (_a.compassHasError == true) checks.add(const GateCheck.block('Compass error. Calibrate the compass or move away from metal.'));
final double? lat = _a.latitude, lon = _a.longitude;
if (spec.points.isNotEmpty && lat != null && lon != null && !(lat == 0 && lon == 0)) {
final LatLng first = spec.points.first.at;
final double d = HudGeometry.distance(lat, lon, first.latitude, first.longitude);
if (d > farFirstWaypoint) checks.add(GateCheck.warn('Waypoint 1 is ${(d / 1000).toStringAsFixed(1)} km from the aircraft.'));
}
if (!model.profile.hasObstacleSensing && spec.points.any((WaypointSpec p) => p.altitude < lowRthHeight)) {
checks.add(const GateCheck.warn('Parts of the route are low and this aircraft cannot see obstacles.'));
}
final bool shoots = spec.points.any((WaypointSpec p) => p.action != WaypointCameraAction.none);
if (shoots && model.camera.storage != null && !model.camera.storage!.usable) {
checks.add(GateCheck.warn("${model.camera.storage!.status}: the route's photos and video will not be saved."));
}
return checks;
}
/// Re-checks [spec], writes [rthHeight] when it changed, uploads the
/// mission and starts it. [onUploaded] runs between the two.
Future<void> startWaypointMission(
WaypointMissionSpec spec, {
MissionLimits limits = const MissionLimits(),
int? rthHeight,
void Function()? onUploaded,
}) async {
final List<GateCheck> checks = checkWaypointStart(spec, limits);
if (checks.any((GateCheck c) => c.blocks)) throw MissionRefused(checks);
if (rthHeight != null) {
final int h = rthHeight.clamp(minRthHeight, maxRthHeight);
if (h != _a.goHomeHeight?.round()) await dji.setGoHomeHeight(h);
}
await dji.uploadWaypointMission(spec.toBridge(gimbalMin: limits.gimbalMin, gimbalMax: limits.gimbalMax));
onUploaded?.call();
await dji.startWaypointMission();
}
/// Holds the aircraft where it is; the mission can resume from there.
Future<void> pauseWaypointMission() async {
if (!model.mission.waypoint.executing) {
throw const MissionRefused(<GateCheck>[GateCheck.block('No waypoint mission is flying.')]);
}
await dji.pauseWaypointMission();
}
Future<void> resumeWaypointMission() async {
final List<GateCheck> checks = <GateCheck>[
if (!model.mission.waypoint.paused) const GateCheck.block('The mission is not paused.'),
if ((_a.gpsSignalLevel ?? 0) < FlightStatus.minGpsLevel) const GateCheck.block('GPS too weak to carry on with the route.'),
if (_a.goingHome == true) const GateCheck.block('The aircraft is returning to home.'),
];
if (checks.isNotEmpty) throw MissionRefused(checks);
await dji.resumeWaypointMission();
}
// ── Vision modes: ActiveTrack and TapFly (plan P7b) ─────────────────────────
/// Below this height (m above take-off) the vision modes refuse to start:
/// the aircraft needs room to climb over and see the subject.
static const double visionMinAltitude = 2;
/// TapFly speed range the operator accepts, m/s.
static const double tapFlyMinSpeed = 1;
static const double tapFlyMaxSpeed = 10;
/// TapFly directions this product can fly: Backward needs rear sensors, Free
/// the newer flight controllers that ship with them.
List<TapFlyDirection> tapFlyDirections() {
final VisionSensors v = model.profile.vision;
final bool rear = v == VisionSensors.frontBack || v == VisionSensors.omni;
return <TapFlyDirection>[
TapFlyDirection.forward,
if (rear || !model.profile.connected) TapFlyDirection.backward,
if (rear || !model.profile.connected) TapFlyDirection.free,
];
}
/// What both vision modes need: flying in P mode with room, nothing else in charge.
void _visionCommon(List<GateCheck> checks) {
if (_a.isFlying != true) {
checks.add(const GateCheck.block('Take off first.'));
return;
}
final String mode = _a.flightModeEnum ?? '';
if (_a.goingHome == true || mode == 'GO_HOME') checks.add(const GateCheck.block('Cancel Return to Home first.'));
if (mode == 'AUTO_LANDING' || mode == 'CONFIRM_LANDING') checks.add(const GateCheck.block('The aircraft is landing.'));
if (model.mission.waypoint.active) checks.add(const GateCheck.block('Stop the waypoint mission first.'));
if (mode == 'ATTI' || mode == 'GPS_SPORT' || mode == 'MANUAL') {
checks.add(const GateCheck.block('Switch the remote to P mode first.'));
}
final double? h = _a.altitude;
if (h != null && h < visionMinAltitude) checks.add(const GateCheck.block('Climb above 2 m first.'));
final int? percent = model.battery.percent;
final int critical = model.battery.seriousLowWarningThreshold ?? 15;
final int low = model.battery.lowWarningThreshold ?? 30;
if (_a.seriousLowBattery == true || (percent != null && percent <= critical)) {
checks.add(GateCheck.block('Battery critically low${percent == null ? '' : ' ($percent%)'}.'));
} else if (_a.lowBattery == true || (percent != null && percent <= low)) {
checks.add(GateCheck.warn('Battery low${percent == null ? '' : ' ($percent%)'}.'));
}
if ((_a.gpsSignalLevel ?? 0) < FlightStatus.minGpsLevel) {
checks.add(const GateCheck.warn('Weak GPS: the aircraft may drift while it follows.'));
}
}
/// Preconditions for following a subject in [mode].
List<GateCheck> checkActiveTrack(TrackMode mode) {
final List<GateCheck> checks = <GateCheck>[];
if (!model.connected) return checks..add(const GateCheck.block('No aircraft connected.'));
if (_a.updatedAt == null) return checks..add(const GateCheck.block('Waiting for the flight controller to report.'));
if (model.mission.activeTrack.unsupported) return checks..add(const GateCheck.block('This aircraft cannot run ActiveTrack.'));
_visionCommon(checks);
if (model.mission.tapFly.active) checks.add(const GateCheck.block('Stop TapFly first.'));
if (!model.profile.hasObstacleSensing && mode != TrackMode.spotlight) {
checks.add(const GateCheck.warn('This aircraft cannot see obstacles: keep the path behind the subject clear.'));
} else if (mode == TrackMode.profile) {
checks.add(const GateCheck.warn('Profile flies sideways, where the aircraft has no obstacle sensors.'));
}
return checks;
}
/// Re-checks and starts following the subject in [rect] (0..1 of the live view).
Future<void> startActiveTrack(Rect rect, TrackMode mode) async {
final List<GateCheck> checks = checkActiveTrack(mode);
if (checks.any((GateCheck c) => c.blocks)) throw MissionRefused(checks);
final Rect r = Rect.fromLTRB(rect.left.clamp(0, 1), rect.top.clamp(0, 1), rect.right.clamp(0, 1), rect.bottom.clamp(0, 1));
await dji.startActiveTrack(r.left, r.top, r.width, r.height, mode: mode.sdk);
}
/// Re-checks and follows the auto-sensed subject [index].
Future<void> startActiveTrackSubject(int index, TrackMode mode) async {
final List<GateCheck> checks = checkActiveTrack(mode);
if (checks.any((GateCheck c) => c.blocks)) throw MissionRefused(checks);
await dji.startActiveTrackSubject(index, mode: mode.sdk);
}
/// Turns the aircraft's own subject detection on or off (not while following).
Future<void> setAutoSensing(bool on) async {
if (!model.connected) throw const MissionRefused(<GateCheck>[GateCheck.block('No aircraft connected.')]);
if (!model.mission.activeTrack.autoSensingSupported) {
throw const MissionRefused(<GateCheck>[GateCheck.block('This aircraft cannot detect subjects itself.')]);
}
if (model.mission.activeTrack.active) throw const MissionRefused(<GateCheck>[GateCheck.block('Stop tracking first.')]);
await dji.setActiveTrackAutoSensing(on);
}
/// Trace's "fly backwards ahead of a subject walking towards the aircraft".
Future<void> setTrackRetreat(bool on) async {
if (!model.connected) throw const MissionRefused(<GateCheck>[GateCheck.block('No aircraft connected.')]);
if (on && !model.profile.hasObstacleSensing) {
throw const MissionRefused(<GateCheck>[GateCheck.block('Flying backwards needs obstacle sensing.')]);
}
await dji.setActiveTrackRetreat(on);
}
/// In TapFly Free, turns the aircraft back to face where it is flying.
Future<void> resetTapFlyHeading() async {
if (!model.mission.tapFly.active) throw const MissionRefused(<GateCheck>[GateCheck.block('TapFly is not flying.')]);
await dji.resetTapFlyHeading();
}
/// Answers the operator's "is this the subject?".
Future<void> confirmActiveTrack({required bool yes}) async {
if (!model.mission.activeTrack.waitingForConfirmation && !model.mission.activeTrack.cannotConfirm) return;
await (yes ? dji.acceptActiveTrackConfirmation() : dji.rejectActiveTrackConfirmation());
}
Future<void> switchActiveTrackMode(TrackMode mode) async {
if (!model.mission.activeTrack.active) {
throw const MissionRefused(<GateCheck>[GateCheck.block('Not tracking a subject.')]);
}
await dji.switchActiveTrackMode(mode.sdk);
}
/// Preconditions for flying towards a tapped point in [direction].
List<GateCheck> checkTapFly(TapFlyDirection direction) {
final List<GateCheck> checks = <GateCheck>[];
if (!model.connected) return checks..add(const GateCheck.block('No aircraft connected.'));
if (_a.updatedAt == null) return checks..add(const GateCheck.block('Waiting for the flight controller to report.'));
if (model.mission.tapFly.unsupported) return checks..add(const GateCheck.block('This aircraft cannot run TapFly.'));
_visionCommon(checks);
if (model.mission.activeTrack.active) checks.add(const GateCheck.block('Stop ActiveTrack first.'));
if (!tapFlyDirections().contains(direction)) checks.add(GateCheck.block('${direction.label} is not available on this aircraft.'));
if (direction == TapFlyDirection.free) {
checks.add(const GateCheck.warn('Free does not avoid obstacles sideways: watch the video.'));
} else if (!model.profile.hasObstacleSensing) {
checks.add(const GateCheck.warn('This aircraft cannot see obstacles: it flies straight into whatever is in the way.'));
}
return checks;
}
/// Re-checks and flies towards [target] (0..1 of the live view).
Future<void> startTapFly(Offset target, TapFlyDirection direction, {double speed = 5}) async {
final List<GateCheck> checks = checkTapFly(direction);
if (checks.any((GateCheck c) => c.blocks)) throw MissionRefused(checks);
await dji.startTapFly(
target.dx.clamp(0.0, 1.0),
target.dy.clamp(0.0, 1.0),
mode: direction.sdk,
speed: speed.clamp(tapFlyMinSpeed, tapFlyMaxSpeed),
avoidance: direction != TapFlyDirection.free,
);
}
/// Changes the TapFly speed in flight.
Future<void> setTapFlySpeed(double speed) async {
if (!model.mission.tapFly.active) return;
await dji.setTapFlySpeed(speed.clamp(tapFlyMinSpeed, tapFlyMaxSpeed));
}
// ── Virtual sticks (plan P8) ────────────────────────────────────────────────
/// Preconditions for handing the aircraft to the on-screen sticks.
///
/// Simulator first: on an aircraft that has a remote, the sticks are refused
/// outside the simulator unless the developer switch allows them. Aircraft
/// whose primary control *is* the phone (Spark / Mavic Air on Wi-Fi) may fly
/// them for real, with a warning.
List<GateCheck> checkVirtualSticks() {
final List<GateCheck> checks = <GateCheck>[];
if (!model.connected) return checks..add(const GateCheck.block('No aircraft connected.'));
if (_a.updatedAt == null) return checks..add(const GateCheck.block('Waiting for the flight controller to report.'));
final ProductProfile p = model.profile;
if (p.connected && !p.supportsVirtualStick) return checks..add(const GateCheck.block('This aircraft cannot be flown with on-screen sticks.'));
final String mode = _a.flightModeEnum ?? '';
if (_a.goingHome == true || mode == 'GO_HOME') checks.add(const GateCheck.block('Cancel Return to Home first.'));
if (mode == 'AUTO_LANDING' || mode == 'CONFIRM_LANDING') checks.add(const GateCheck.block('The aircraft is landing.'));
switch (RailState.activeMode(_a, model.mission)) {
case ActiveMode.waypoint:
checks.add(const GateCheck.block('Stop the waypoint mission first.'));
case ActiveMode.activeTrack:
checks.add(const GateCheck.block('Stop ActiveTrack first.'));
case ActiveMode.tapFly:
checks.add(const GateCheck.block('Stop TapFly first.'));
case ActiveMode.other:
checks.add(const GateCheck.block('Stop the intelligent flight mode first.'));
case ActiveMode.none:
break;
}
final int? percent = model.battery.percent;
final int critical = model.battery.seriousLowWarningThreshold ?? 15;
if (_a.seriousLowBattery == true || (percent != null && percent <= critical)) {
checks.add(GateCheck.block('Battery critically low${percent == null ? '' : ' ($percent%)'}.'));
}
final bool simulating = _a.simulatorActive == true;
if (!simulating) {
if (!p.virtualStickPrimary && !FlyPrefs.sticksInRealFlight.value) {
checks.add(const GateCheck.block(
'On-screen sticks are for the simulator on this aircraft: start it in Settings → General → Developer, '
'or allow real flights there.'));
} else {
checks.add(const GateCheck.warn('This is a real flight: the aircraft moves as you push the sticks.'));
}
}
if (_a.isFlying != true) {
checks.add(const GateCheck.warn('The sticks do not start the motors: take off with TAKE OFF, then fly.'));
}
if ((_a.gpsSignalLevel ?? 0) < FlightStatus.minGpsLevel && !simulating) {
checks.add(const GateCheck.warn('Weak GPS: the aircraft drifts when the sticks are centred.'));
}
if (p.hasRcLink) {
checks.add(const GateCheck.warn("The remote's sticks are ignored meanwhile: flip its flight-mode switch to take back control."));
}
return checks;
}
/// Re-checks and puts the flight controller in virtual-stick mode.
Future<void> enableVirtualSticks() async {
final List<GateCheck> checks = checkVirtualSticks();
if (checks.any((GateCheck c) => c.blocks)) throw MissionRefused(checks);
await dji.setVirtualStickEnabled(true);
}
/// Hands control back to the remote. Always allowed.
Future<void> disableVirtualSticks() => dji.setVirtualStickEnabled(false);
/// One stick packet. Not re-checked per packet (25 Hz); the controller closes
/// the sticks when RTH, landing or the remote takes over.
Future<void> sendSticks(StickCommand c) => dji.sendVirtualStick(forward: c.forward, right: c.right, yaw: c.yaw, up: c.up);
/// True when the pilot stands far enough from the recorded home point that
/// RTH should ask whether to come back to them instead (GO 4's RTH target).
bool get offersRthTarget => (pilotToHome ?? 0) > rthTargetChoiceDistance;
/// Metres between the pilot (the phone's fix) and the recorded home point.
double? get pilotToHome {
final double? pLat = model.phoneLatitude, pLon = model.phoneLongitude;
final double? hLat = _a.homeLatitude, hLon = _a.homeLongitude;
if (pLat == null || pLon == null || hLat == null || hLon == null) return null;
return HudGeometry.distance(pLat, pLon, hLat, hLon);
}
/// Answers the flight controller's low-battery smart-RTH countdown: true
/// flies home now, false cancels it. Ignored once the countdown has ended.
Future<void> answerSmartRth({required bool goHome}) async {
if (_a.goHome?.smartRTHCountingDown != true) return;
await dji.confirmSmartRTH(goHome);
}
/// Re-checks [command] and sends it. For take-off, [precision] asks for a
/// precision take-off; for RTH, [rthHeight] is written first when it differs
/// from the current setting and [homeToPilot] moves the home point to the
/// phone's position.
Future<void> run(FlightCommand command, {bool precision = false, int? rthHeight, bool homeToPilot = false}) async {
final GateVerdict v = check(command);
if (!v.allowed) throw SafetyGateRefused(v);
switch (command) {
case FlightCommand.takeOff:
await (precision ? dji.precisionTakeOff() : dji.takeOff());
case FlightCommand.land:
await dji.land();
case FlightCommand.cancelLanding:
await dji.cancelLanding();
case FlightCommand.confirmLanding:
await dji.confirmLanding();
case FlightCommand.goHome:
if (homeToPilot && model.phoneLatitude != null && model.phoneLongitude != null) {
await dji.setHomeLocation(model.phoneLatitude!, model.phoneLongitude!);
}
if (rthHeight != null) {
final int h = rthHeight.clamp(minRthHeight, maxRthHeight);
if (h != _a.goHomeHeight?.round()) await dji.setGoHomeHeight(h);
}
await dji.startGoHome();
case FlightCommand.cancelGoHome:
await dji.cancelGoHome();
case FlightCommand.stopMode:
switch (RailState.activeMode(_a, model.mission)) {
case ActiveMode.waypoint:
await dji.stopWaypointMission();
case ActiveMode.activeTrack:
await dji.stopActiveTrack();
case ActiveMode.tapFly:
await dji.stopTapFly();
case ActiveMode.none:
case ActiveMode.other:
break; // refused by check()
}
}
}
}