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Gadgetbridge/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/zeppos/services/ZeppOsCalendarService.java

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Java
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/* Copyright (C) 2023-2024 José Rebelo
This file is part of Gadgetbridge.
Gadgetbridge is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Gadgetbridge is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.charset.StandardCharsets;
import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEventUpdatePreferences;
import nodomain.freeyourgadget.gadgetbridge.model.CalendarEventSpec;
import nodomain.freeyourgadget.gadgetbridge.service.btle.BLETypeConversions;
import nodomain.freeyourgadget.gadgetbridge.service.btle.TransactionBuilder;
import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.ZeppOsSupport;
import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.AbstractZeppOsService;
import nodomain.freeyourgadget.gadgetbridge.util.StringUtils;
public class ZeppOsCalendarService extends AbstractZeppOsService {
private static final Logger LOG = LoggerFactory.getLogger(ZeppOsCalendarService.class);
public static final short ENDPOINT = 0x0007;
public static final byte CMD_CAPABILITIES_REQUEST = 0x01;
public static final byte CMD_CAPABILITIES_RESPONSE = 0x02;
public static final byte CMD_EVENTS_REQUEST = 0x05;
public static final byte CMD_EVENTS_RESPONSE = 0x06;
public static final byte CMD_CREATE_EVENT = 0x07;
public static final byte CMD_CREATE_EVENT_ACK = 0x08;
public static final byte CMD_DELETE_EVENT = 0x09;
public static final byte CMD_DELETE_EVENT_ACK = 0x0a;
public static final String PREF_VERSION = "zepp_os_calendar_version";
private int version = -1;
public ZeppOsCalendarService(final ZeppOsSupport support) {
super(support, false);
}
@Override
public short getEndpoint() {
return ENDPOINT;
}
@Override
public void initialize(final TransactionBuilder builder) {
requestCapabilities(builder);
}
public void requestCapabilities(final TransactionBuilder builder) {
write(builder, CMD_CAPABILITIES_REQUEST);
}
@Override
public void handlePayload(final byte[] payload) {
switch (payload[0]) {
case CMD_CAPABILITIES_RESPONSE:
version = payload[1];
getSupport().evaluateGBDeviceEvent(new GBDeviceEventUpdatePreferences(PREF_VERSION, version));
if (version != 1 && version != 3) {
LOG.warn("Unsupported calendar service version {}", version);
return;
}
LOG.info("Calendar service version={}", version);
break;
case CMD_EVENTS_RESPONSE:
LOG.info("Got calendar events from band");
decodeAndUpdateCalendarEvents(payload);
return;
case CMD_CREATE_EVENT_ACK:
LOG.info("Calendar create event ACK, status = {}", payload[1]);
return;
case CMD_DELETE_EVENT_ACK:
LOG.info("Calendar delete event ACK, status = {}", payload[1]);
return;
default:
LOG.warn("Unexpected calendar payload byte {}", String.format("0x%02x", payload[0]));
}
}
public void requestCalendarEvents() {
LOG.info("Requesting calendar events from band");
write("request calendar events", new byte[]{CMD_EVENTS_REQUEST, 0x00, 0x00});
}
public void addEvent(final CalendarEventSpec calendarEventSpec) {
if (calendarEventSpec.type != CalendarEventSpec.TYPE_UNKNOWN) {
LOG.warn("Unsupported calendar event type {}", calendarEventSpec.type);
return;
}
LOG.info("Sending calendar event {} to band", calendarEventSpec.id);
int length = 34;
if (calendarEventSpec.title != null) {
length += calendarEventSpec.title.getBytes(StandardCharsets.UTF_8).length;
}
if (calendarEventSpec.description != null) {
length += calendarEventSpec.description.getBytes(StandardCharsets.UTF_8).length;
}
if (version == 3) {
if (calendarEventSpec.location != null) {
length += calendarEventSpec.location.getBytes(StandardCharsets.UTF_8).length;
}
// Extra null byte at the end
length++;
}
final ByteBuffer buf = ByteBuffer.allocate(length);
buf.order(ByteOrder.LITTLE_ENDIAN);
buf.put(CMD_CREATE_EVENT);
buf.putInt((int) calendarEventSpec.id);
if (calendarEventSpec.title != null) {
buf.put(calendarEventSpec.title.getBytes(StandardCharsets.UTF_8));
}
buf.put((byte) 0x00);
if (calendarEventSpec.description != null) {
buf.put(calendarEventSpec.description.getBytes(StandardCharsets.UTF_8));
}
buf.put((byte) 0x00);
buf.putInt(calendarEventSpec.timestamp);
buf.putInt(calendarEventSpec.timestamp + calendarEventSpec.durationInSeconds);
// Remind
if (calendarEventSpec.reminders != null && !calendarEventSpec.reminders.isEmpty()) {
buf.putInt((int) (calendarEventSpec.reminders.get(0) / 1000L));
} else {
buf.putInt(0);
}
// Repeat
buf.put((byte) 0x00); // ?
buf.put((byte) 0x00); // ?
buf.put((byte) 0x00); // ?
buf.put((byte) 0x00); // ?
// ?
buf.put((byte) 0xff); // ?
buf.put((byte) 0xff); // ?
buf.put((byte) 0xff); // ?
buf.put((byte) 0xff); // ?
buf.put(bool(calendarEventSpec.allDay));
buf.put((byte) 0x00); // ?
buf.put((byte) 130); // ?
buf.put((byte) 0x00); // ?
buf.put((byte) 0x00); // ?
buf.put((byte) 0x00); // ?
buf.put((byte) 0x00); // ?
// TODO: Description here
if (version == 3) {
if (calendarEventSpec.location != null) {
buf.put(calendarEventSpec.location.getBytes(StandardCharsets.UTF_8));
}
buf.put((byte) 0x00);
}
write("add calendar event", buf.array());
}
public void deleteEvent(final byte type, final long id) {
if (type != CalendarEventSpec.TYPE_UNKNOWN) {
LOG.warn("Unsupported calendar event type {}", type);
return;
}
LOG.info("Deleting calendar event {} from band", id);
final ByteBuffer buf = ByteBuffer.allocate(5);
buf.order(ByteOrder.LITTLE_ENDIAN);
buf.put(CMD_DELETE_EVENT);
buf.putInt((int) id);
write("delete calendar event", buf.array());
}
private void decodeAndUpdateCalendarEvents(final byte[] payload) {
final int numEvents = payload[1];
// FIXME there's a 0 after this, is it actually a 2-byte short?
if (payload.length < 1 + numEvents * 34) {
LOG.warn("Unexpected payload length of {} for {} calendar events", payload.length, numEvents);
return;
}
int i = 3;
while (i < payload.length) {
if (payload.length - i < 34) {
LOG.error("Not enough bytes remaining to parse a calendar event ({})", payload.length - i);
return;
}
final int eventId = BLETypeConversions.toUint32(payload, i);
i += 4;
final String title = StringUtils.untilNullTerminator(payload, i);
if (title == null) {
LOG.error("Failed to decode title");
return;
}
i += title.length() + 1;
final String description = StringUtils.untilNullTerminator(payload, i);
if (description == null) {
LOG.error("Failed to decode description");
return;
}
i += description.length() + 1;
final int startTime = BLETypeConversions.toUint32(payload, i);
i += 4;
final int endTime = BLETypeConversions.toUint32(payload, i);
i += 4;
final int reminderTime = BLETypeConversions.toUint32(payload, i);
i += 4;
// ? 00 00 00 00 ff ff ff ff
i += 12;
boolean allDay = (payload[i] == 0x01);
i++;
// ? 00 82 00 00 00 00
i += 6;
LOG.info("Calendar Event {}: {}", eventId, title);
}
if (i != payload.length) {
LOG.error("Unexpected calendar events payload trailer, {} bytes were not consumed", payload.length - i);
return;
}
// TODO update database?
}
}
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