/* Copyright (C) 2019-2024 José Rebelo, Petr Vaněk, Q-er
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Gadgetbridge is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.activities.charts;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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import nodomain.freeyourgadget.gadgetbridge.model.ActivityKind;
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import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
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public class SleepAnalysis {
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public static final long MIN_SESSION_LENGTH = 5 * 60;
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public static final long MAX_WAKE_PHASE_LENGTH = 2 * 60 * 60;
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public List<SleepSession> calculateSleepSessions(List<? extends ActivitySample> samples) {
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List<SleepSession> result = new ArrayList<>();
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ActivitySample previousSample = null;
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Date sleepStart = null;
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Date sleepEnd = null;
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long lightSleepDuration = 0;
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long deepSleepDuration = 0;
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long remSleepDuration = 0;
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long awakeSleepDuration = 0;
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long durationSinceLastSleep = 0;
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for (ActivitySample sample : samples) {
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if (isSleep(sample)) {
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if (sleepStart == null)
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sleepStart = getDateFromSample(sample);
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sleepEnd = getDateFromSample(sample);
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durationSinceLastSleep = 0;
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} else {
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//exclude "not worn" times from sleep sessions as this makes a discrepancy with the charts
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if (lightSleepDuration + deepSleepDuration + remSleepDuration + awakeSleepDuration > MIN_SESSION_LENGTH)
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result.add(new SleepSession(sleepStart, sleepEnd, lightSleepDuration, deepSleepDuration, remSleepDuration, awakeSleepDuration));
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sleepStart = null;
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sleepEnd = null;
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lightSleepDuration = 0;
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deepSleepDuration = 0;
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remSleepDuration = 0;
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awakeSleepDuration = 0;
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}
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if (previousSample != null) {
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long durationSinceLastSample = sample.getTimestamp() - previousSample.getTimestamp();
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if (sample.getKind() == ActivityKind.LIGHT_SLEEP) {
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lightSleepDuration += durationSinceLastSample;
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} else if (sample.getKind() == ActivityKind.DEEP_SLEEP) {
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deepSleepDuration += durationSinceLastSample;
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} else if (sample.getKind() == ActivityKind.REM_SLEEP) {
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remSleepDuration += durationSinceLastSample;
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} else if (sample.getKind() == ActivityKind.AWAKE_SLEEP) {
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awakeSleepDuration += durationSinceLastSample;
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} else {
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durationSinceLastSleep += durationSinceLastSample;
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if (sleepStart != null && durationSinceLastSleep > MAX_WAKE_PHASE_LENGTH) {
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if (lightSleepDuration + deepSleepDuration + remSleepDuration + awakeSleepDuration > MIN_SESSION_LENGTH)
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result.add(new SleepSession(sleepStart, sleepEnd, lightSleepDuration, deepSleepDuration, remSleepDuration, awakeSleepDuration));
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sleepStart = null;
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sleepEnd = null;
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lightSleepDuration = 0;
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deepSleepDuration = 0;
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remSleepDuration = 0;
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awakeSleepDuration = 0;
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}
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}
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}
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previousSample = sample;
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}
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if (lightSleepDuration + deepSleepDuration + remSleepDuration + awakeSleepDuration > MIN_SESSION_LENGTH) {
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result.add(new SleepSession(sleepStart, sleepEnd, lightSleepDuration, deepSleepDuration, remSleepDuration, awakeSleepDuration));
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}
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return result;
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}
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private boolean isSleep(ActivitySample sample) {
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return sample.getKind() == ActivityKind.DEEP_SLEEP ||
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sample.getKind() == ActivityKind.LIGHT_SLEEP ||
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sample.getKind() == ActivityKind.REM_SLEEP ||
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sample.getKind() == ActivityKind.AWAKE_SLEEP;
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}
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private Date getDateFromSample(ActivitySample sample) {
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return new Date(sample.getTimestamp() * 1000L);
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}
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public static class SleepSession {
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private final Date sleepStart;
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private final Date sleepEnd;
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private final long lightSleepDuration;
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private final long deepSleepDuration;
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private final long remSleepDuration;
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private final long awakeSleepDuration;
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private SleepSession(Date sleepStart,
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Date sleepEnd,
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long lightSleepDuration,
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long deepSleepDuration,
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long remSleepDuration,
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long awakeSleepDuration) {
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this.sleepStart = sleepStart;
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this.sleepEnd = sleepEnd;
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this.lightSleepDuration = lightSleepDuration;
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this.deepSleepDuration = deepSleepDuration;
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this.remSleepDuration = remSleepDuration;
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this.awakeSleepDuration = awakeSleepDuration;
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}
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public Date getSleepStart() {
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return sleepStart;
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}
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public Date getSleepEnd() {
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return sleepEnd;
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}
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public long getLightSleepDuration() {
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return lightSleepDuration;
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}
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public long getDeepSleepDuration() {
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return deepSleepDuration;
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}
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public long getRemSleepDuration() {
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return remSleepDuration;
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}
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public long getAwakeSleepDuration() {
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return awakeSleepDuration;
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}
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}
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}
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