function parse_osm_xml($uri)
{
global $messages;
$r = new XMLReader();
if (!$r->open($uri, 'utf-8')) {
$messages[] = _('Failed to open XML stream');
return;
}
$result = array();
$mode = false;
$cur = array();
while ($r->read()) {
if ($r->nodeType == XMLReader::ELEMENT) {
if ($r->name == 'modify' || $r->name == 'create' || $r->name == 'delete') {
$mode = $r->name;
} elseif ($r->name == 'node' || $r->name == 'way' || $r->name == 'relation' || $r->name == 'changeset') {
$id = $r->getAttribute('id');
if ($id === null) {
$id = 0;
}
if (is_pint($id)) {
$cur['type'] = $r->name;
$cur['id'] = $id;
$action = $mode ? $mode : $r->getAttribute('action');
if ($action) {
$cur['action'] = $action;
}
// user, uid, visible, changeset, timestamp
$version = $r->getAttribute('version');
$user = $r->getAttribute('user');
$uid = $r->getAttribute('uid');
$visible = $r->getAttribute('visible');
$changeset = $r->getAttribute('changeset');
$timestamp = $r->getAttribute('timestamp');
if (is_pint($version, true)) {
$cur['version'] = $version;
}
if ($user !== null && strlen($user) > 0) {
$cur['user'] = $user;
}
if (is_pint($uid, true)) {
$cur['uid'] = $uid;
}
if (is_pint($changeset, true)) {
$cur['changeset'] = $changeset;
}
if ($timestamp != null && strlen($timestamp) > 10) {
$cur['timestamp'] = $timestamp;
}
// parse?
if ($visible === 'false') {
$cur['deleted'] = true;
}
$cur['tags'] = array();
if ($r->name == 'node') {
$lat = $r->getAttribute('lat');
$lon = $r->getAttribute('lon');
if (is_numeric($lat) && is_numeric($lon)) {
$cur['lat'] = $lat;
$cur['lon'] = $lon;
}
} elseif ($r->name == 'way') {
$cur['nodes'] = array();
} elseif ($r->name == 'relation') {
$cur['members'] = array();
}
}
} elseif ($r->name == 'tag') {
$key = $r->getAttribute('k');
$value = $r->getAttribute('v');
if ($key !== null && $value !== null) {
$tkey = hard_trim($key);
$tvalue = hard_trim($value);
if (strlen($tkey) > 0 && strlen($tvalue) > 0) {
$cur['tags'][$tkey] = $tvalue;
}
if (!isset($cur['action']) && ($key !== $tkey || $value !== $tvalue)) {
$cur['action'] = 'modify';
}
}
} elseif ($r->name == 'nd') {
$ref = $r->getAttribute('ref');
if (is_pint($ref)) {
$cur['nodes'][] = $ref;
}
} elseif ($r->name == 'member') {
$mtype = $r->getAttribute('type');
$mref = $r->getAttribute('ref');
$mrole = $r->getAttribute('role');
if ($mtype !== null && preg_match('/^(?:node|way|relation)$/', $mtype) && is_pint($mref)) {
$member = array('type' => $mtype, 'id' => $mref);
$member['role'] = $mrole === null ? '' : $mrole;
$cur['members'][] = $member;
}
}
}
if ($r->nodeType == XMLReader::END_ELEMENT || $r->isEmptyElement) {
if ($r->name == $mode) {
$mode = false;
} elseif (isset($cur['type']) && $r->name == $cur['type']) {
if (isset($cur['version']) && $cur['version'] > 1) {
// if $result contains older version, remove it
for ($i = 0; $i < count($result); $i++) {
if ($result[$i]['type'] == $cur['type'] && $result[$i]['id'] == $cur['id'] && (!isset($result['version']) || $result['version'] <= $cur['version'])) {
array_splice($result, $i, 1);
break;
}
}
}
$result[] = $cur;
$cur = array();
}
}
if (count($result) == MAX_REQUEST_OBJECTS) {
$messages[] = sprintf(_('Download is incomplete, maximum of %d objects has been reached'), MAX_REQUEST_OBJECTS);
break;
}
}
$r->close();
return renumber_created($result);
}
function update_data($data)
{
global $basedata, $userdata, $messages, $added, $modified;
// arrays for merging
if (!isset($added) || !isset($modified)) {
$added = array();
$modified = array();
}
if (count($userdata)) {
$data = renumber_created($data, $userdata);
}
// nb: this is already done in osmapi.php
foreach ($data as $obj) {
$objnv = strip_version($obj);
if ($obj['type'] == 'changeset') {
// check that created changeset metadata is not duplicated
if ($obj['id'] > 0) {
$found = false;
foreach ($userdata as $obj) {
if ($obj['type'] == 'changeset' && $obj['id'] <= 0) {
$found = true;
break;
}
}
if ($found) {
$messages[] = _('There can be only one changeset metadata') . '.';
continue;
}
}
$userdata[] = $objnv;
$added[] = $objnv;
} elseif ($obj['id'] <= 0 || isset($obj['action']) && $obj['action'] == 'create') {
// created objects go straight to userdata
$userdata[] = $objnv;
$added[] = $objnv;
} else {
// modify, delete or base
if (!isset($obj['version'])) {
$messages[] = sprintf(_('No version for object %s %s.'), $obj['type'], $obj['id']);
continue;
}
if (isset($obj['action']) && strlen($obj['action']) > 0) {
// for deleted and modified save only version
$res = array('type' => $obj['type'], 'id' => $obj['id'], 'version' => $obj['version'], 'complete' => false);
} else {
$res = $obj;
$res['complete'] = true;
}
// $res goes to basedata, $obj should be merged with userdata
$pk = $res['type'] . $res['id'];
$version_diff = $res['version'] - (isset($basedata[$pk]) ? $basedata[$pk]['version'] : 0);
if (!isset($basedata[$pk]) || !$version_diff) {
if (!isset($basedata[$pk]) || !$basedata[$pk]['complete']) {
$basedata[$pk] = $res;
}
// userdata: if exists and modified, leave current version, otherwise replace
$found = false;
for ($i = 0; $i < count($userdata); $i++) {
if ($userdata[$i]['type'] == $res['type'] && $userdata[$i]['id'] == $res['id']) {
$found = true;
if (!is_modified($userdata[$i])) {
// should we replace it with the new version? idk.
// $userdata[$i] = $objnv;
// $modified[] = $objnv;
}
}
}
if (!$found) {
$userdata[] = $objnv;
$added[] = $objnv;
}
} elseif ($version_diff < 0) {
// it's really old, skip it
$messages[] = sprintf(_('Found older version of %s %s: %d instead of %d.'), $res['type'], $res['id'], $res['version'], $basedata[$pk]['version']);
} else {
$basedata[$pk] = $res;
// userdata: if exists and modified, then conflict!
$found = false;
for ($i = 0; $i < count($userdata); $i++) {
if ($userdata[$i]['type'] == $res['type'] && $userdata[$i]['id'] == $res['id']) {
$found = true;
if (is_modified($userdata[$i])) {
$objnv['conflict'] = $userdata[$i];
$userdata[$i] = $objnv;
$modified[] = $objnv;
}
}
}
if (!$found) {
$userdata[] = $objnv;
$added[] = $objnv;
}
}
}
}
}