function insertChunk($data, $csum)
{
$received_data_csum = new Csum($data);
global $l;
$l->a("Started insertChunk<br>");
$status = 0;
$id = null;
if (!matches($csum, $received_data_csum)) {
$status = 8;
} else {
$db = new FractureDB('futuqiur_ember');
$potentialDuplicates = $db->getColumnsUH('chunks', 'id', 'md5', $csum->md5);
foreach ($potentialDuplicates as $potential) {
$potentialRecord = retrieveChunk($potential['id']);
if (!is_null($potentialRecord)) {
$potentialData = $potentialRecord['data'];
$potentialCsum = Csum_import($potentialRecord['csum']);
if ($potentialData === $data && matches($csum, $potentialCsum)) {
$duplicateId = $potential['id'];
return array('id' => $duplicateId, 'status' => $status);
}
}
}
global $compression;
global $coalVersion;
$details = array('csum' => $csum->export(), 'compression' => $compression, 'coalVersion' => $coalVersion);
$prepared_details = base64_encode(serialize($details));
global $chunkMasterKey;
$data = bzcompress($prepared_details . '@CoalFragmentMarker@' . $data);
$prepared_data = mc_encrypt($data, $chunkMasterKey);
if (mc_decrypt($prepared_data, $chunkMasterKey) != $data) {
$status = 53;
}
$id = $db->addRow('chunks', 'md5', 'UNHEX(\'' . $csum->md5 . '\')');
$identifierId = substr($id / 1000, 0, 1) / 5;
$randomInt = substr(rand(0, 10), 0, 1);
$randomIntAlt = substr(rand(0, 10), 0, 1);
$identifier = $identifierId . $randomInt . '.COALPROJECT.RECORD33';
$fallbackid = $identifierId . $randomIntAlt . '.COALPROJECT.RECORD33';
$address = 'ia:' . $identifier;
$filename = $id . '.coal4';
global $iaAuthKey;
global $iaPrivateKey;
$upload = @ia_upload($prepared_data, $identifier, $fallbackid, $filename, $iaAuthKey, $iaPrivateKey);
if ($upload != 0) {
$status = 54;
echo 'Failed to add coal. Upload returned status code ' . $upload . '.';
$db->dropRow('chunks', $id);
} else {
$db->setField('chunks', 'address', $address, $id);
}
$db->close();
}
$l->a("Finished insertChunk with status " . $status . '<br>');
return array('id' => $id, 'status' => $status);
}
function store($data, $csumb)
{
$csum = new Csum($data);
if (!$csum->matches($csumb)) {
return null;
}
$status = 0;
//Why I'm not doing this type of deduplication: It could lead to inaccurate metadata about the coal.
//Ya know, screw that. Coal *shouldn't support* file uploads — that should be handled by higher level software. I'm putting this back in for now, and just remember that the Coal file-level metadata is only an ugly, non-archival-quality, incomplete hack for while Ember doesn't exist yet to take care of that.
$db = new FractureDB('futuqiur_ember');
$potentialDuplicates = $db->getColumnsUH('strings', 'id', 'md5', $csum->md5);
foreach ($potentialDuplicates as $potential) {
//echo 'duplicate testing';
$potentialRecord = retrieveCoal($potential['id']);
if (!is_null($potentialRecord)) {
$potentialData = $potentialRecord['data'];
$potentialCsum = Csum_import($potentialRecord['csum']);
if ($potentialData === $data && matches($csum, $potentialCsum)) {
$duplicateId = $potential['id'];
return array('id' => $duplicateId, 'csum' => $potentialRecord['csum'], 'status' => $status);
}
}
}
$db->close();
//echo 'gotten here';
$filename = 'coal_temp/' . uniqid() . '.cstf';
file_put_contents($filename, $data);
return insertCoal($filename, $csum);
}
