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/*
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* Copyright © 2013 – 2015 Ricki Hirner (bitfire web engineering).
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the GNU Public License v3.0
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* which accompanies this distribution, and is available at
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* http://www.gnu.org/licenses/gpl.html
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*/
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package at.bitfire.davdroid.syncadapter;
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import android.accounts.Account;
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import android.content.ContentValues;
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import android.content.Context;
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import android.content.SyncResult;
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import android.os.Bundle;
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import android.text.TextUtils;
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import com.google.common.base.Charsets;
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import com.google.common.base.Joiner;
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import com.squareup.okhttp.HttpUrl;
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import com.squareup.okhttp.MediaType;
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import com.squareup.okhttp.RequestBody;
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import com.squareup.okhttp.ResponseBody;
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import org.dmfs.provider.tasks.TaskContract.TaskLists;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.charset.Charset;
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import java.util.HashMap;
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import java.util.LinkedList;
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import java.util.List;
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import at.bitfire.dav4android.DavCalendar;
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import at.bitfire.dav4android.DavResource;
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import at.bitfire.dav4android.exception.DavException;
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import at.bitfire.dav4android.exception.HttpException;
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import at.bitfire.dav4android.property.CalendarColor;
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import at.bitfire.dav4android.property.CalendarData;
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import at.bitfire.dav4android.property.DisplayName;
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import at.bitfire.dav4android.property.GetCTag;
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import at.bitfire.dav4android.property.GetContentType;
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import at.bitfire.dav4android.property.GetETag;
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import at.bitfire.davdroid.ArrayUtils;
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import at.bitfire.davdroid.Constants;
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import at.bitfire.davdroid.resource.LocalCalendar;
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import at.bitfire.davdroid.resource.LocalResource;
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import at.bitfire.davdroid.resource.LocalTask;
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import at.bitfire.davdroid.resource.LocalTaskList;
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import at.bitfire.ical4android.CalendarStorageException;
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import at.bitfire.ical4android.InvalidCalendarException;
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import at.bitfire.ical4android.Task;
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import at.bitfire.ical4android.TaskProvider;
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import lombok.Cleanup;
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public class TasksSyncManager extends SyncManager {
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protected static final int
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MAX_MULTIGET = 30,
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NOTIFICATION_ID = 3;
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final protected TaskProvider provider;
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public TasksSyncManager(Context context, Account account, Bundle extras, TaskProvider provider, SyncResult result, LocalTaskList taskList) {
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super(NOTIFICATION_ID, context, account, extras, result);
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this.provider = provider;
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localCollection = taskList;
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}
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@Override
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protected void prepare() {
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Thread.currentThread().setContextClassLoader(context.getClassLoader()); // required for ical4j
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collectionURL = HttpUrl.parse(localTaskList().getSyncId());
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davCollection = new DavCalendar(httpClient, collectionURL);
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}
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@Override
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protected void queryCapabilities() throws DavException, IOException, HttpException, CalendarStorageException {
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davCollection.propfind(0, DisplayName.NAME, CalendarColor.NAME, GetCTag.NAME);
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// update name and color
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DisplayName pDisplayName = (DisplayName)davCollection.properties.get(DisplayName.NAME);
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String displayName = (pDisplayName != null && !TextUtils.isEmpty(pDisplayName.displayName)) ?
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pDisplayName.displayName : collectionURL.toString();
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CalendarColor pColor = (CalendarColor)davCollection.properties.get(CalendarColor.NAME);
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int color = (pColor != null && pColor.color != null) ? pColor.color : LocalCalendar.defaultColor;
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ContentValues values = new ContentValues(2);
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Constants.log.info("Setting new calendar name \"" + displayName + "\" and color 0x" + Integer.toHexString(color));
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values.put(TaskLists.LIST_NAME, displayName);
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values.put(TaskLists.LIST_COLOR, color);
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localTaskList().update(values);
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}
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@Override
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protected RequestBody prepareUpload(LocalResource resource) throws IOException, CalendarStorageException {
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LocalTask local = (LocalTask)resource;
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return RequestBody.create(
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DavCalendar.MIME_ICALENDAR,
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local.getTask().toStream().toByteArray()
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);
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}
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@Override
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protected void listRemote() throws IOException, HttpException, DavException {
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// fetch list of remote VTODOs and build hash table to index file name
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davCalendar().calendarQuery("VTODO");
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remoteResources = new HashMap<>(davCollection.members.size());
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for (DavResource vCard : davCollection.members) {
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String fileName = vCard.fileName();
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Constants.log.debug("Found remote VTODO: " + fileName);
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remoteResources.put(fileName, vCard);
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}
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}
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@Override
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protected void downloadRemote() throws IOException, HttpException, DavException, CalendarStorageException {
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Constants.log.info("Downloading " + toDownload.size() + " tasks (" + MAX_MULTIGET + " at once)");
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// download new/updated iCalendars from server
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for (DavResource[] bunch : ArrayUtils.partition(toDownload.toArray(new DavResource[toDownload.size()]), MAX_MULTIGET)) {
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Constants.log.info("Downloading " + Joiner.on(" + ").join(bunch));
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if (bunch.length == 1) {
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// only one contact, use GET
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DavResource remote = bunch[0];
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ResponseBody body = remote.get("text/calendar");
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String eTag = ((GetETag)remote.properties.get(GetETag.NAME)).eTag;
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@Cleanup InputStream stream = body.byteStream();
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processVTodo(remote.fileName(), eTag, stream, body.contentType().charset(Charsets.UTF_8));
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} else {
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// multiple contacts, use multi-get
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List<HttpUrl> urls = new LinkedList<>();
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for (DavResource remote : bunch)
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urls.add(remote.location);
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davCalendar().multiget(urls.toArray(new HttpUrl[urls.size()]));
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// process multiget results
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for (DavResource remote : davCollection.members) {
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String eTag;
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GetETag getETag = (GetETag)remote.properties.get(GetETag.NAME);
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if (getETag != null)
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eTag = getETag.eTag;
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else
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throw new DavException("Received multi-get response without ETag");
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Charset charset = Charsets.UTF_8;
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GetContentType getContentType = (GetContentType)remote.properties.get(GetContentType.NAME);
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if (getContentType != null && getContentType.type != null) {
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MediaType type = MediaType.parse(getContentType.type);
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if (type != null)
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charset = type.charset(Charsets.UTF_8);
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}
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CalendarData calendarData = (CalendarData)remote.properties.get(CalendarData.NAME);
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if (calendarData == null || calendarData.iCalendar == null)
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throw new DavException("Received multi-get response without address data");
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@Cleanup InputStream stream = new ByteArrayInputStream(calendarData.iCalendar.getBytes());
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processVTodo(remote.fileName(), eTag, stream, charset);
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}
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}
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}
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}
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// helpers
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private LocalTaskList localTaskList() { return ((LocalTaskList)localCollection); }
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private DavCalendar davCalendar() { return (DavCalendar)davCollection; }
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private void processVTodo(String fileName, String eTag, InputStream stream, Charset charset) throws IOException, CalendarStorageException {
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Task[] tasks = null;
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try {
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tasks = Task.fromStream(stream, charset);
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} catch (InvalidCalendarException e) {
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Constants.log.error("Received invalid iCalendar, ignoring");
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return;
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}
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if (tasks != null && tasks.length == 1) {
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Task newData = tasks[0];
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// update local task, if it exists
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LocalTask localTask = (LocalTask)localResources.get(fileName);
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if (localTask != null) {
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Constants.log.info("Updating " + fileName + " in local tasklist");
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localTask.setETag(eTag);
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localTask.update(newData);
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syncResult.stats.numUpdates++;
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} else {
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Constants.log.info("Adding " + fileName + " to local task list");
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localTask = new LocalTask(localTaskList(), newData, fileName, eTag);
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localTask.add();
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syncResult.stats.numInserts++;
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}
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} else
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Constants.log.error("Received VCALENDAR with not exactly one VEVENT with UID, but without RECURRENCE-ID; ignoring " + fileName);
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}
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}
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Ricki Hirner
9 years ago