mirror of
https://github.com/oxen-io/session-android.git
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153 lines
5.6 KiB
Java
153 lines
5.6 KiB
Java
package org.thoughtcrime.securesms.service;
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import android.content.Context;
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import org.thoughtcrime.securesms.logging.Log;
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import org.thoughtcrime.securesms.database.DatabaseFactory;
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import org.thoughtcrime.securesms.database.MmsDatabase;
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import org.thoughtcrime.securesms.database.SmsDatabase;
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import org.thoughtcrime.securesms.database.model.MessageRecord;
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import java.util.Comparator;
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import java.util.TreeSet;
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import java.util.concurrent.Executor;
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import java.util.concurrent.Executors;
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public class ExpiringMessageManager {
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private static final String TAG = ExpiringMessageManager.class.getSimpleName();
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private final TreeSet<ExpiringMessageReference> expiringMessageReferences = new TreeSet<>(new ExpiringMessageComparator());
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private final Executor executor = Executors.newSingleThreadExecutor();
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private final SmsDatabase smsDatabase;
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private final MmsDatabase mmsDatabase;
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private final Context context;
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public ExpiringMessageManager(Context context) {
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this.context = context.getApplicationContext();
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this.smsDatabase = DatabaseFactory.getSmsDatabase(context);
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this.mmsDatabase = DatabaseFactory.getMmsDatabase(context);
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executor.execute(new LoadTask());
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executor.execute(new ProcessTask());
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}
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public void scheduleDeletion(long id, boolean mms, long expiresInMillis) {
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scheduleDeletion(id, mms, System.currentTimeMillis(), expiresInMillis);
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}
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public void scheduleDeletion(long id, boolean mms, long startedAtTimestamp, long expiresInMillis) {
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long expiresAtMillis = startedAtTimestamp + expiresInMillis;
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synchronized (expiringMessageReferences) {
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expiringMessageReferences.add(new ExpiringMessageReference(id, mms, expiresAtMillis));
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expiringMessageReferences.notifyAll();
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}
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}
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public void checkSchedule() {
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synchronized (expiringMessageReferences) {
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expiringMessageReferences.notifyAll();
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}
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}
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private class LoadTask implements Runnable {
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public void run() {
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SmsDatabase.Reader smsReader = smsDatabase.readerFor(smsDatabase.getExpirationStartedMessages());
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MmsDatabase.Reader mmsReader = mmsDatabase.getExpireStartedMessages();
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MessageRecord messageRecord;
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while ((messageRecord = smsReader.getNext()) != null) {
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expiringMessageReferences.add(new ExpiringMessageReference(messageRecord.getId(),
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messageRecord.isMms(),
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messageRecord.getExpireStarted() + messageRecord.getExpiresIn()));
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}
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while ((messageRecord = mmsReader.getNext()) != null) {
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expiringMessageReferences.add(new ExpiringMessageReference(messageRecord.getId(),
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messageRecord.isMms(),
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messageRecord.getExpireStarted() + messageRecord.getExpiresIn()));
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}
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smsReader.close();
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mmsReader.close();
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}
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}
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@SuppressWarnings("InfiniteLoopStatement")
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private class ProcessTask implements Runnable {
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public void run() {
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while (true) {
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ExpiringMessageReference expiredMessage = null;
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synchronized (expiringMessageReferences) {
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try {
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while (expiringMessageReferences.isEmpty()) expiringMessageReferences.wait();
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ExpiringMessageReference nextReference = expiringMessageReferences.first();
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long waitTime = nextReference.expiresAtMillis - System.currentTimeMillis();
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if (waitTime > 0) {
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ExpirationListener.setAlarm(context, waitTime);
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expiringMessageReferences.wait(waitTime);
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} else {
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expiredMessage = nextReference;
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expiringMessageReferences.remove(nextReference);
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}
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} catch (InterruptedException e) {
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Log.w(TAG, e);
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}
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}
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if (expiredMessage != null) {
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if (expiredMessage.mms) mmsDatabase.delete(expiredMessage.id);
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else smsDatabase.deleteMessage(expiredMessage.id);
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}
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}
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}
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}
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private static class ExpiringMessageReference {
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private final long id;
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private final boolean mms;
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private final long expiresAtMillis;
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private ExpiringMessageReference(long id, boolean mms, long expiresAtMillis) {
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this.id = id;
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this.mms = mms;
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this.expiresAtMillis = expiresAtMillis;
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}
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@Override
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public boolean equals(Object other) {
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if (other == null) return false;
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if (!(other instanceof ExpiringMessageReference)) return false;
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ExpiringMessageReference that = (ExpiringMessageReference)other;
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return this.id == that.id && this.mms == that.mms && this.expiresAtMillis == that.expiresAtMillis;
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}
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@Override
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public int hashCode() {
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return (int)this.id ^ (mms ? 1 : 0) ^ (int)expiresAtMillis;
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}
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}
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private static class ExpiringMessageComparator implements Comparator<ExpiringMessageReference> {
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@Override
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public int compare(ExpiringMessageReference lhs, ExpiringMessageReference rhs) {
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if (lhs.expiresAtMillis < rhs.expiresAtMillis) return -1;
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else if (lhs.expiresAtMillis > rhs.expiresAtMillis) return 1;
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else if (lhs.id < rhs.id) return -1;
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else if (lhs.id > rhs.id) return 1;
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else if (!lhs.mms && rhs.mms) return -1;
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else if (lhs.mms && !rhs.mms) return 1;
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else return 0;
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}
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}
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}
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