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<?php |
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/** |
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* @author Russell Michell 2018 <[email protected]> |
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* @package silverstripe-verifiable |
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*/ |
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namespace PhpTek\Verifiable\Controller; |
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use SilverStripe\ORM\DataObject; |
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use SilverStripe\Control\HTTPRequest; |
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use SilverStripe\ORM\DB; |
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use SilverStripe\Core\ClassInfo; |
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use SilverStripe\Control\Controller; |
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use SilverStripe\Core\Injector\Injector; |
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use SilverStripe\Control\Director; |
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use SilverStripe\Versioned\Versioned; |
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use PhpTek\Verifiable\ORM\FieldType\ChainpointProof; |
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use PhpTek\Verifiable\Verify\VerifiableExtension; |
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/** |
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* Controller available to CLI or AJAX for updating all or selected versions. |
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* |
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* @todo Check with Tierion API docs: How many nodes should be submitted to? And why if I submit to only one, does the network not synchronise it? |
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* @todo Update logic to write hashes to all 3 nodes, not just the first as-is the case in the client() method. |
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*/ |
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class UpdateProofController extends Controller |
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{ |
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/** |
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* @param HTTPRequest $request |
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* @throws Exception |
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*/ |
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public function index(HTTPRequest $request = null) |
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{ |
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if (!$backend = $this->verifiableService->getBackend()->name() === 'chainpoint') { |
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throw new \Exception(sprintf('Cannot use %s backend with %s!', $backend, __CLASS__)); |
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} |
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$this->log('NOTICE', 'Start: Processing proofs...', 2); |
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// Get all records with partial proofs. Attempt to fetch their full proofs |
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// from Tierion, then write them back to local DB |
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$this->updateVersions(); |
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$this->log('NOTICE', 'Finish: Processing proofs.'); |
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} |
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/** |
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* Fetch all partial proofs, ready to make them whole again by re-writing to |
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* each xxx_Versions table's "Proof" field. |
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* |
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* @return array |
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*/ |
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protected function updateVersions() |
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{ |
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// Get decorated classes |
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$dataObjectSublasses = ClassInfo::getValidSubClasses(DataObject::class); |
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$candidates = []; |
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foreach ($dataObjectSublasses as $class) { |
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$obj = Injector::inst()->create($class); |
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if (!$obj->hasExtension(VerifiableExtension::class)) { |
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continue; |
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} |
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$this->log('NOTICE', "Processing class: $class"); |
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foreach ($class::get() as $item) { |
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// TODO Get all versions that have non-duplicated proof-hashes |
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$versions = Versioned::get_all_versions($class, $item->ID)->sort('Version ASC'); |
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foreach ($versions as $record) { |
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$proof = $record->dbObject('Proof'); |
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if ($proof->isInitial()) { |
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$this->log('NOTICE', "\tInitial proof found for ID #{$record->RecordID} and version {$record->Version}"); |
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$this->log('NOTICE', "\tRequesting proof via UUID {$proof->getHashIdNode()[0]}"); |
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// I don't understand the Tierion network... if we submit a hash to one IP |
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// the rest of the network is not updated. So we need to pre-seed the service |
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// with the saved nodes...unless it's only verified proofs that get propagated..?? |
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$nodes = $record->dbObject('Extra')->getStoreAsArray(); |
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$uuid = $proof->getHashIdNode()[0]; |
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$this->verifiableService->setExtra($nodes); |
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$this->log('NOTICE', sprintf('Calling %s/proofs/%s', $nodes[0], $uuid)); |
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// Don't attempt to write anything that isn't a full proof |
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$response = $this->verifiableService->call('read', $uuid); |
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$isFull = ChainpointProof::create() |
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->setValue($response) |
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->isFull(); |
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if ($isFull) { |
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$this->log('NOTICE', "Full proof fetched. Updating record with ID #{$record->RecordID} and version $version"); |
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$this->updateQuery($record, $version, $response); |
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} else { |
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$this->log('WARN', "No full proof found for record with ID #{$record->RecordID} and version $version"); |
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} |
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} |
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} |
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} |
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} |
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return $candidates; |
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} |
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/** |
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* Use the lowest level of the ORM to update the xxx_Versions table directly |
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* with a proof. |
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* |
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* @param type $id |
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* @param type $version |
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*/ |
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protected function updateQuery($object, $version, $proof) |
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{ |
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$table = sprintf('%s_Versions', $object->config()->get('table_name')); |
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$sql = sprintf( |
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'UPDATE "%s" SET "Proof" = \'%s\' WHERE "RecordID" = %d AND "Version" = %d', |
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$table, |
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$proof, |
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$object->ID, |
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$version |
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); |
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DB::query($sql); |
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$this->log('NOTICE', "Version #$version of record #{$object->ID} updated."); |
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} |
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/** |
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* @param string $type |
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* @param string $msg |
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* @param int $newLine |
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* @return void |
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* @todo Declare a custom Monolog\Formatter\FormatterInterface |
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*/ |
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private function log(string $type, string $msg, int $newLines = 1) |
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{ |
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$lb = Director::is_cli() ? PHP_EOL : '<br/>'; |
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echo sprintf('[%s] %s%s', $type, $msg, str_repeat($lb, $newLines)); |
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} |
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} |
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phptek /
silverstripe-verifiable
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