Add PackagesVersion

Summary:
Ref T8116. A version has:

  - a package (like "Arcanist") which it belongs to;
  - a name (like "v3.1.5").

The name is immutable and unique, like the package key and publisher key.

Policy stuff:

  - Versions have the exact same policies as their packages.
  - You must be able to edit a package to create new versions of it.

This is still entirely uninteresting.

Test Plan: {F1731703}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T8116

Differential Revision: https://secure.phabricator.com/D16316

resources/sql/autopatches/20160721.pack.06.version.sql

@@ -0,0 +1,10 @@
+CREATE TABLE {$NAMESPACE}_packages.packages_version (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  phid VARBINARY(64) NOT NULL,
+  name VARCHAR(64) NOT NULL COLLATE {$COLLATE_SORT},
+  packagePHID VARBINARY(64) NOT NULL,
+  dateCreated INT UNSIGNED NOT NULL,
+  dateModified INT UNSIGNED NOT NULL,
+  UNIQUE KEY `key_phid` (phid),
+  UNIQUE KEY `key_package` (packagePHID, name)
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};

resources/sql/autopatches/20160721.pack.07.versionxaction.sql

@@ -0,0 +1,19 @@
+CREATE TABLE {$NAMESPACE}_packages.packages_versiontransaction (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  phid VARBINARY(64) NOT NULL,
+  authorPHID VARBINARY(64) NOT NULL,
+  objectPHID VARBINARY(64) NOT NULL,
+  viewPolicy VARBINARY(64) NOT NULL,
+  editPolicy VARBINARY(64) NOT NULL,
+  commentPHID VARBINARY(64) DEFAULT NULL,
+  commentVersion INT UNSIGNED NOT NULL,
+  transactionType VARCHAR(32) COLLATE {$COLLATE_TEXT} NOT NULL,
+  oldValue LONGTEXT COLLATE {$COLLATE_TEXT} NOT NULL,
+  newValue LONGTEXT COLLATE {$COLLATE_TEXT} NOT NULL,
+  contentSource LONGTEXT COLLATE {$COLLATE_TEXT} NOT NULL,
+  metadata LONGTEXT COLLATE {$COLLATE_TEXT} NOT NULL,
+  dateCreated INT UNSIGNED NOT NULL,
+  dateModified INT UNSIGNED NOT NULL,
+  UNIQUE KEY `key_phid` (`phid`),
+  KEY `key_object` (`objectPHID`)
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};

src/__phutil_library_map__.php

@@ -2979,6 +2979,7 @@ phutil_register_library_map(array(
     'PhabricatorPackagesEditor' => 'applications/packages/editor/PhabricatorPackagesEditor.php',
     'PhabricatorPackagesPackage' => 'applications/packages/storage/PhabricatorPackagesPackage.php',
     'PhabricatorPackagesPackageController' => 'applications/packages/controller/PhabricatorPackagesPackageController.php',
+    'PhabricatorPackagesPackageDatasource' => 'applications/packages/typeahead/PhabricatorPackagesPackageDatasource.php',
     'PhabricatorPackagesPackageEditConduitAPIMethod' => 'applications/packages/conduit/PhabricatorPackagesPackageEditConduitAPIMethod.php',
     'PhabricatorPackagesPackageEditController' => 'applications/packages/controller/PhabricatorPackagesPackageEditController.php',
     'PhabricatorPackagesPackageEditEngine' => 'applications/packages/editor/PhabricatorPackagesPackageEditEngine.php',
@@ -3016,6 +3017,23 @@ phutil_register_library_map(array(
     'PhabricatorPackagesQuery' => 'applications/packages/query/PhabricatorPackagesQuery.php',
     'PhabricatorPackagesSchemaSpec' => 'applications/packages/storage/PhabricatorPackagesSchemaSpec.php',
     'PhabricatorPackagesTransactionType' => 'applications/packages/xaction/PhabricatorPackagesTransactionType.php',
+    'PhabricatorPackagesVersion' => 'applications/packages/storage/PhabricatorPackagesVersion.php',
+    'PhabricatorPackagesVersionController' => 'applications/packages/controller/PhabricatorPackagesVersionController.php',
+    'PhabricatorPackagesVersionEditConduitAPIMethod' => 'applications/packages/conduit/PhabricatorPackagesVersionEditConduitAPIMethod.php',
+    'PhabricatorPackagesVersionEditController' => 'applications/packages/controller/PhabricatorPackagesVersionEditController.php',
+    'PhabricatorPackagesVersionEditEngine' => 'applications/packages/editor/PhabricatorPackagesVersionEditEngine.php',
+    'PhabricatorPackagesVersionEditor' => 'applications/packages/editor/PhabricatorPackagesVersionEditor.php',
+    'PhabricatorPackagesVersionListController' => 'applications/packages/controller/PhabricatorPackagesVersionListController.php',
+    'PhabricatorPackagesVersionNameTransaction' => 'applications/packages/xaction/version/PhabricatorPackagesVersionNameTransaction.php',
+    'PhabricatorPackagesVersionPHIDType' => 'applications/packages/phid/PhabricatorPackagesVersionPHIDType.php',
+    'PhabricatorPackagesVersionPackageTransaction' => 'applications/packages/xaction/version/PhabricatorPackagesVersionPackageTransaction.php',
+    'PhabricatorPackagesVersionQuery' => 'applications/packages/query/PhabricatorPackagesVersionQuery.php',
+    'PhabricatorPackagesVersionSearchConduitAPIMethod' => 'applications/packages/conduit/PhabricatorPackagesVersionSearchConduitAPIMethod.php',
+    'PhabricatorPackagesVersionSearchEngine' => 'applications/packages/query/PhabricatorPackagesVersionSearchEngine.php',
+    'PhabricatorPackagesVersionTransaction' => 'applications/packages/storage/PhabricatorPackagesVersionTransaction.php',
+    'PhabricatorPackagesVersionTransactionQuery' => 'applications/packages/query/PhabricatorPackagesVersionTransactionQuery.php',
+    'PhabricatorPackagesVersionTransactionType' => 'applications/packages/xaction/version/PhabricatorPackagesVersionTransactionType.php',
+    'PhabricatorPackagesVersionViewController' => 'applications/packages/controller/PhabricatorPackagesVersionViewController.php',
     'PhabricatorPagerUIExample' => 'applications/uiexample/examples/PhabricatorPagerUIExample.php',
     'PhabricatorPassphraseApplication' => 'applications/passphrase/application/PhabricatorPassphraseApplication.php',
     'PhabricatorPasswordAuthProvider' => 'applications/auth/provider/PhabricatorPasswordAuthProvider.php',
@@ -7784,6 +7802,7 @@ phutil_register_library_map(array(
       'PhabricatorConduitResultInterface',
     ),
     'PhabricatorPackagesPackageController' => 'PhabricatorPackagesController',
+    'PhabricatorPackagesPackageDatasource' => 'PhabricatorTypeaheadDatasource',
     'PhabricatorPackagesPackageEditConduitAPIMethod' => 'PhabricatorEditEngineAPIMethod',
     'PhabricatorPackagesPackageEditController' => 'PhabricatorPackagesPackageController',
     'PhabricatorPackagesPackageEditEngine' => 'PhabricatorPackagesEditEngine',
@@ -7829,6 +7848,32 @@ phutil_register_library_map(array(
     'PhabricatorPackagesQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'PhabricatorPackagesSchemaSpec' => 'PhabricatorConfigSchemaSpec',
     'PhabricatorPackagesTransactionType' => 'PhabricatorModularTransactionType',
+    'PhabricatorPackagesVersion' => array(
+      'PhabricatorPackagesDAO',
+      'PhabricatorPolicyInterface',
+      'PhabricatorExtendedPolicyInterface',
+      'PhabricatorApplicationTransactionInterface',
+      'PhabricatorDestructibleInterface',
+      'PhabricatorSubscribableInterface',
+      'PhabricatorProjectInterface',
+      'PhabricatorConduitResultInterface',
+    ),
+    'PhabricatorPackagesVersionController' => 'PhabricatorPackagesController',
+    'PhabricatorPackagesVersionEditConduitAPIMethod' => 'PhabricatorEditEngineAPIMethod',
+    'PhabricatorPackagesVersionEditController' => 'PhabricatorPackagesVersionController',
+    'PhabricatorPackagesVersionEditEngine' => 'PhabricatorPackagesEditEngine',
+    'PhabricatorPackagesVersionEditor' => 'PhabricatorPackagesEditor',
+    'PhabricatorPackagesVersionListController' => 'PhabricatorPackagesVersionController',
+    'PhabricatorPackagesVersionNameTransaction' => 'PhabricatorPackagesVersionTransactionType',
+    'PhabricatorPackagesVersionPHIDType' => 'PhabricatorPHIDType',
+    'PhabricatorPackagesVersionPackageTransaction' => 'PhabricatorPackagesVersionTransactionType',
+    'PhabricatorPackagesVersionQuery' => 'PhabricatorPackagesQuery',
+    'PhabricatorPackagesVersionSearchConduitAPIMethod' => 'PhabricatorSearchEngineAPIMethod',
+    'PhabricatorPackagesVersionSearchEngine' => 'PhabricatorApplicationSearchEngine',
+    'PhabricatorPackagesVersionTransaction' => 'PhabricatorModularTransaction',
+    'PhabricatorPackagesVersionTransactionQuery' => 'PhabricatorApplicationTransactionQuery',
+    'PhabricatorPackagesVersionTransactionType' => 'PhabricatorPackagesTransactionType',
+    'PhabricatorPackagesVersionViewController' => 'PhabricatorPackagesVersionController',
     'PhabricatorPagerUIExample' => 'PhabricatorUIExample',
     'PhabricatorPassphraseApplication' => 'PhabricatorApplication',
     'PhabricatorPasswordAuthProvider' => 'PhabricatorAuthProvider',

src/applications/packages/application/PhabricatorPackagesApplication.php

@@ -33,6 +33,8 @@ final class PhabricatorPackagesApplication extends PhabricatorApplication {
           '' => 'PhabricatorPackagesPublisherViewController',
           '(?P<packageKey>[^/]+)/' => array(
             '' => 'PhabricatorPackagesPackageViewController',
+            '(?P<versionKey>[^/]+)/' =>
+              'PhabricatorPackagesVersionViewController',
           ),
         ),
       ),
@@ -49,6 +51,12 @@ final class PhabricatorPackagesApplication extends PhabricatorApplication {
           $this->getEditRoutePattern('edit/') =>
             'PhabricatorPackagesPackageEditController',
         ),
+        'version/' => array(
+          $this->getQueryRoutePattern() =>
+            'PhabricatorPackagesVersionListController',
+          $this->getEditRoutePattern('edit/') =>
+            'PhabricatorPackagesVersionEditController',
+        ),
       ),
     );
   }

src/applications/packages/conduit/PhabricatorPackagesVersionEditConduitAPIMethod.php

@@ -0,0 +1,19 @@
+<?php
+
+final class PhabricatorPackagesVersionEditConduitAPIMethod
+  extends PhabricatorEditEngineAPIMethod {
+
+  public function getAPIMethodName() {
+    return 'packages.version.edit';
+  }
+
+  public function newEditEngine() {
+    return new PhabricatorPackagesVersionEditEngine();
+  }
+
+  public function getMethodSummary() {
+    return pht(
+      'Apply transactions to create a new version or edit an existing one.');
+  }
+
+}

src/applications/packages/conduit/PhabricatorPackagesVersionSearchConduitAPIMethod.php

@@ -0,0 +1,18 @@
+<?php
+
+final class PhabricatorPackagesVersionSearchConduitAPIMethod
+  extends PhabricatorSearchEngineAPIMethod {
+
+  public function getAPIMethodName() {
+    return 'packages.version.search';
+  }
+
+  public function newSearchEngine() {
+    return new PhabricatorPackagesVersionSearchEngine();
+  }
+
+  public function getMethodSummary() {
+    return pht('Read information about versions.');
+  }
+
+}

src/applications/packages/controller/PhabricatorPackagesVersionController.php

@@ -0,0 +1,4 @@
+<?php
+
+abstract class PhabricatorPackagesVersionController
+  extends PhabricatorPackagesController {}

src/applications/packages/controller/PhabricatorPackagesVersionEditController.php

@@ -0,0 +1,12 @@
+<?php
+
+final class PhabricatorPackagesVersionEditController
+  extends PhabricatorPackagesVersionController {
+
+  public function handleRequest(AphrontRequest $request) {
+    return id(new PhabricatorPackagesVersionEditEngine())
+      ->setController($this)
+      ->buildResponse();
+  }
+
+}

src/applications/packages/controller/PhabricatorPackagesVersionListController.php

@@ -0,0 +1,26 @@
+<?php
+
+final class PhabricatorPackagesVersionListController
+  extends PhabricatorPackagesVersionController {
+
+  public function shouldAllowPublic() {
+    return true;
+  }
+
+  public function handleRequest(AphrontRequest $request) {
+    return id(new PhabricatorPackagesVersionSearchEngine())
+      ->setController($this)
+      ->buildResponse();
+  }
+
+  protected function buildApplicationCrumbs() {
+    $crumbs = parent::buildApplicationCrumbs();
+
+    id(new PhabricatorPackagesVersionEditEngine())
+      ->setViewer($this->getViewer())
+      ->addActionToCrumbs($crumbs);
+
+    return $crumbs;
+  }
+
+}

src/applications/packages/controller/PhabricatorPackagesVersionViewController.php

@@ -0,0 +1,91 @@
+<?php
+
+final class PhabricatorPackagesVersionViewController
+  extends PhabricatorPackagesVersionController {
+
+  public function shouldAllowPublic() {
+    return true;
+  }
+
+  public function handleRequest(AphrontRequest $request) {
+    $viewer = $request->getViewer();
+
+    $publisher_key = $request->getURIData('publisherKey');
+    $package_key = $request->getURIData('packageKey');
+    $full_key = $publisher_key.'/'.$package_key;
+    $version_key = $request->getURIData('versionKey');
+
+    $version = id(new PhabricatorPackagesVersionQuery())
+      ->setViewer($viewer)
+      ->withFullKeys(array($full_key))
+      ->withNames(array($version_key))
+      ->executeOne();
+    if (!$version) {
+      return new Aphront404Response();
+    }
+
+    $package = $version->getPackage();
+    $publisher = $package->getPublisher();
+
+    $crumbs = $this->buildApplicationCrumbs()
+      ->addTextCrumb($publisher->getName(), $publisher->getURI())
+      ->addTextCrumb($package->getName(), $package->getURI())
+      ->addTextCrumb($version->getName())
+      ->setBorder(true);
+
+    $header = $this->buildHeaderView($version);
+    $curtain = $this->buildCurtain($version);
+
+    $timeline = $this->buildTransactionTimeline(
+      $version,
+      new PhabricatorPackagesVersionTransactionQuery());
+
+    $version_view = id(new PHUITwoColumnView())
+      ->setHeader($header)
+      ->setCurtain($curtain)
+      ->setMainColumn($timeline);
+
+    return $this->newPage()
+      ->setCrumbs($crumbs)
+      ->setPageObjectPHIDs(
+        array(
+          $version->getPHID(),
+        ))
+      ->appendChild($version_view);
+  }
+
+
+  private function buildHeaderView(PhabricatorPackagesVersion $version) {
+    $viewer = $this->getViewer();
+    $name = $version->getName();
+
+    return id(new PHUIHeaderView())
+      ->setViewer($viewer)
+      ->setHeader($name)
+      ->setPolicyObject($version)
+      ->setHeaderIcon('fa-tag');
+  }
+
+  private function buildCurtain(PhabricatorPackagesVersion $version) {
+    $viewer = $this->getViewer();
+    $curtain = $this->newCurtainView($version);
+
+    $can_edit = PhabricatorPolicyFilter::hasCapability(
+      $viewer,
+      $version,
+      PhabricatorPolicyCapability::CAN_EDIT);
+
+    $id = $version->getID();
+    $edit_uri = $this->getApplicationURI("version/edit/{$id}/");
+
+    $curtain->addAction(
+      id(new PhabricatorActionView())
+        ->setName(pht('Edit Version'))
+        ->setIcon('fa-pencil')
+        ->setDisabled(!$can_edit)
+        ->setHref($edit_uri));
+
+    return $curtain;
+  }
+
+}

src/applications/packages/editor/PhabricatorPackagesVersionEditEngine.php

@@ -0,0 +1,93 @@
+<?php
+
+final class PhabricatorPackagesVersionEditEngine
+  extends PhabricatorPackagesEditEngine {
+
+  const ENGINECONST = 'packages.version';
+
+  public function getEngineName() {
+    return pht('Package Versions');
+  }
+
+  public function getSummaryHeader() {
+    return pht('Edit Package Version Configurations');
+  }
+
+  public function getSummaryText() {
+    return pht('This engine is used to edit Packages versions.');
+  }
+
+  protected function newEditableObject() {
+    $viewer = $this->getViewer();
+    return PhabricatorPackagesVersion::initializeNewVersion($viewer);
+  }
+
+  protected function newObjectQuery() {
+    return new PhabricatorPackagesVersionQuery();
+  }
+
+  protected function getObjectCreateTitleText($object) {
+    return pht('Create Version');
+  }
+
+  protected function getObjectCreateButtonText($object) {
+    return pht('Create Version');
+  }
+
+  protected function getObjectEditTitleText($object) {
+    return pht('Edit Version: %s', $object->getName());
+  }
+
+  protected function getObjectEditShortText($object) {
+    return pht('Edit Version');
+  }
+
+  protected function getObjectCreateShortText() {
+    return pht('Create Version');
+  }
+
+  protected function getObjectName() {
+    return pht('Version');
+  }
+
+  protected function getEditorURI() {
+    return '/packages/version/edit/';
+  }
+
+  protected function getObjectCreateCancelURI($object) {
+    return '/packages/version/';
+  }
+
+  protected function getObjectViewURI($object) {
+    return $object->getURI();
+  }
+
+  protected function buildCustomEditFields($object) {
+    $fields = array();
+
+    if ($this->getIsCreate()) {
+      $fields[] = id(new PhabricatorDatasourceEditField())
+        ->setKey('package')
+        ->setAliases(array('packagePHID'))
+        ->setLabel(pht('Package'))
+        ->setDescription(pht('Package for this version.'))
+        ->setTransactionType(
+          PhabricatorPackagesVersionPackageTransaction::TRANSACTIONTYPE)
+        ->setIsRequired(true)
+        ->setDatasource(new PhabricatorPackagesPackageDatasource())
+        ->setSingleValue($object->getPackagePHID());
+
+      $fields[] = id(new PhabricatorTextEditField())
+        ->setKey('name')
+        ->setLabel(pht('Name'))
+        ->setDescription(pht('Name of the version.'))
+        ->setTransactionType(
+          PhabricatorPackagesVersionNameTransaction::TRANSACTIONTYPE)
+        ->setIsRequired(true)
+        ->setValue($object->getName());
+    }
+
+    return $fields;
+  }
+
+}

src/applications/packages/editor/PhabricatorPackagesVersionEditor.php

@@ -0,0 +1,46 @@
+<?php
+
+final class PhabricatorPackagesVersionEditor
+  extends PhabricatorPackagesEditor {
+
+  public function getEditorObjectsDescription() {
+    return pht('Package Versions');
+  }
+
+  public function getCreateObjectTitle($author, $object) {
+    return pht('%s created this version.', $author);
+  }
+
+  public function getCreateObjectTitleForFeed($author, $object) {
+    return pht('%s created %s.', $author, $object);
+  }
+
+  protected function shouldPublishFeedStory(
+    PhabricatorLiskDAO $object,
+    array $xactions) {
+    return true;
+  }
+
+  protected function getMailTo(PhabricatorLiskDAO $object) {
+    return array();
+  }
+
+  protected function didCatchDuplicateKeyException(
+    PhabricatorLiskDAO $object,
+    array $xactions,
+    Exception $ex) {
+
+    $errors = array();
+    $errors[] = new PhabricatorApplicationTransactionValidationError(
+      PhabricatorPackagesVersionNameTransaction::TRANSACTIONTYPE,
+      pht('Duplicate'),
+      pht(
+        'The version "%s" already exists for this package. Each version '.
+        'must have a unique name.',
+        $object->getName()),
+      null);
+
+    throw new PhabricatorApplicationTransactionValidationException($errors);
+  }
+
+}

src/applications/packages/phid/PhabricatorPackagesVersionPHIDType.php

@@ -0,0 +1,45 @@
+<?php
+
+final class PhabricatorPackagesVersionPHIDType
+  extends PhabricatorPHIDType {
+
+  const TYPECONST = 'PVER';
+
+  public function getTypeName() {
+    return pht('Version');
+  }
+
+  public function newObject() {
+    return new PhabricatorPackagesVersion();
+  }
+
+  public function getPHIDTypeApplicationClass() {
+    return 'PhabricatorPackagesApplication';
+  }
+
+  protected function buildQueryForObjects(
+    PhabricatorObjectQuery $query,
+    array $phids) {
+
+    return id(new PhabricatorPackagesVersionQuery())
+      ->withPHIDs($phids);
+  }
+
+  public function loadHandles(
+    PhabricatorHandleQuery $query,
+    array $handles,
+    array $objects) {
+
+    foreach ($handles as $phid => $handle) {
+      $version = $objects[$phid];
+
+      $name = $version->getName();
+      $uri = $version->getURI();
+
+      $handle
+        ->setName($name)
+        ->setURI($uri);
+    }
+  }
+
+}

src/applications/packages/query/PhabricatorPackagesPackageQuery.php

@@ -74,31 +74,8 @@ final class PhabricatorPackagesPackageQuery
     }
 
     if ($this->fullKeys !== null) {
-      $parts = array();
-      foreach ($this->fullKeys as $full_key) {
-        $key_parts = explode('/', $full_key, 2);
-
-        if (count($key_parts) != 2) {
-          continue;
-        }
-
-        $parts[] = qsprintf(
-          $conn,
-          '(u.publisherKey = %s AND p.packageKey = %s)',
-          $key_parts[0],
-          $key_parts[1]);
-      }
-
-      // If none of the full keys we were provided were valid, we don't
-      // match any results.
-      if (!$parts) {
-        throw new PhabricatorEmptyQueryException();
-      }
-
-      $where[] = qsprintf(
-        $conn,
-        '%Q',
-        implode(' OR ', $parts));
+      $parts = $this->buildFullKeyClauseParts($conn, $this->fullKeys);
+      $where[] = qsprintf($conn, '%Q', $parts);
     }
 
     return $where;

src/applications/packages/query/PhabricatorPackagesQuery.php

@@ -7,4 +7,32 @@ abstract class PhabricatorPackagesQuery
     return 'PhabricatorPackagesApplication';
   }
 
+  protected function buildFullKeyClauseParts(
+    AphrontDatabaseConnection $conn,
+    array $full_keys) {
+
+    $parts = array();
+    foreach ($full_keys as $full_key) {
+      $key_parts = explode('/', $full_key, 2);
+
+      if (count($key_parts) != 2) {
+        continue;
+      }
+
+      $parts[] = qsprintf(
+        $conn,
+        '(u.publisherKey = %s AND p.packageKey = %s)',
+        $key_parts[0],
+        $key_parts[1]);
+    }
+
+    // If none of the full keys we were provided were valid, we don't
+    // match any results.
+    if (!$parts) {
+      throw new PhabricatorEmptyQueryException();
+    }
+
+    return implode(' OR ', $parts);
+  }
+
 }

src/applications/packages/query/PhabricatorPackagesVersionQuery.php

@@ -0,0 +1,141 @@
+<?php
+
+final class PhabricatorPackagesVersionQuery
+  extends PhabricatorPackagesQuery {
+
+  private $ids;
+  private $phids;
+  private $packagePHIDs;
+  private $fullKeys;
+  private $names;
+
+  public function withIDs(array $ids) {
+    $this->ids = $ids;
+    return $this;
+  }
+
+  public function withPHIDs(array $phids) {
+    $this->phids = $phids;
+    return $this;
+  }
+
+  public function withPackagePHIDs(array $phids) {
+    $this->packagePHIDs = $phids;
+    return $this;
+  }
+
+  public function withFullKeys(array $keys) {
+    $this->fullKeys = $keys;
+    return $this;
+  }
+
+  public function withNames(array $names) {
+    $this->names = $names;
+    return $this;
+  }
+
+  public function newResultObject() {
+    return new PhabricatorPackagesVersion();
+  }
+
+  protected function loadPage() {
+    return $this->loadStandardPage($this->newResultObject());
+  }
+
+  protected function buildWhereClauseParts(AphrontDatabaseConnection $conn) {
+    $where = parent::buildWhereClauseParts($conn);
+
+    if ($this->ids !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'v.id IN (%Ld)',
+        $this->ids);
+    }
+
+    if ($this->phids !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'v.phid IN (%Ls)',
+        $this->phids);
+    }
+
+    if ($this->packagePHIDs !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'v.packagePHID IN (%Ls)',
+        $this->packagePHIDs);
+    }
+
+    if ($this->names !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'v.name IN (%Ls)',
+        $this->names);
+    }
+
+    if ($this->fullKeys !== null) {
+      $parts = $this->buildFullKeyClauseParts($conn, $this->fullKeys);
+      $where[] = qsprintf($conn, '%Q', $parts);
+    }
+
+    return $where;
+  }
+
+  protected function buildJoinClauseParts(AphrontDatabaseConnection $conn) {
+    $joins = parent::buildJoinClauseParts($conn);
+
+    $join_publisher = ($this->fullKeys !== null);
+    $join_package = ($this->fullKeys !== null) || $join_publisher;
+
+    if ($join_package) {
+      $package_table = new PhabricatorPackagesPackage();
+
+      $joins[] = qsprintf(
+        $conn,
+        'JOIN %T p ON v.packagePHID = p.phid',
+        $package_table->getTableName());
+    }
+
+    if ($join_publisher) {
+      $publisher_table = new PhabricatorPackagesPublisher();
+
+      $joins[] = qsprintf(
+        $conn,
+        'JOIN %T u ON u.phid = p.publisherPHID',
+        $publisher_table->getTableName());
+    }
+
+    return $joins;
+  }
+
+  protected function willFilterPage(array $versions) {
+    $package_phids = mpull($versions, 'getPackagePHID');
+
+    $packages = id(new PhabricatorPackagesPackageQuery())
+      ->setViewer($this->getViewer())
+      ->setParentQuery($this)
+      ->withPHIDs($package_phids)
+      ->execute();
+    $packages = mpull($packages, null, 'getPHID');
+
+    foreach ($versions as $key => $version) {
+      $package = idx($packages, $version->getPackagePHID());
+
+      if (!$package) {
+        unset($versions[$key]);
+        $this->didRejectResult($version);
+        continue;
+      }
+
+      $version->attachPackage($package);
+    }
+
+    return $versions;
+  }
+
+  protected function getPrimaryTableAlias() {
+    return 'v';
+  }
+
+
+}

src/applications/packages/query/PhabricatorPackagesVersionSearchEngine.php

@@ -0,0 +1,76 @@
+<?php
+
+final class PhabricatorPackagesVersionSearchEngine
+  extends PhabricatorApplicationSearchEngine {
+
+  public function getResultTypeDescription() {
+    return pht('Package Versions');
+  }
+
+  public function getApplicationClassName() {
+    return 'PhabricatorPackagesApplication';
+  }
+
+  public function newQuery() {
+    return id(new PhabricatorPackagesVersionQuery());
+  }
+
+  protected function buildQueryFromParameters(array $map) {
+    $query = $this->newQuery();
+
+    return $query;
+  }
+
+  protected function buildCustomSearchFields() {
+    return array();
+  }
+
+  protected function getURI($path) {
+    return '/packages/version/'.$path;
+  }
+
+  protected function getBuiltinQueryNames() {
+    $names = array(
+      'all' => pht('All Versions'),
+    );
+
+    return $names;
+  }
+
+  public function buildSavedQueryFromBuiltin($query_key) {
+    $query = $this->newSavedQuery();
+    $query->setQueryKey($query_key);
+
+    switch ($query_key) {
+      case 'all':
+        return $query;
+    }
+
+    return parent::buildSavedQueryFromBuiltin($query_key);
+  }
+
+  protected function renderResultList(
+    array $versions,
+    PhabricatorSavedQuery $query,
+    array $handles) {
+
+    assert_instances_of($versions, 'PhabricatorPackagesVersion');
+
+    $viewer = $this->requireViewer();
+
+    $list = id(new PHUIObjectItemListView())
+      ->setViewer($viewer);
+    foreach ($versions as $version) {
+      $item = id(new PHUIObjectItemView())
+        ->setHeader($version->getName())
+        ->setHref($version->getURI());
+
+      $list->addItem($item);
+    }
+
+    return id(new PhabricatorApplicationSearchResultView())
+      ->setObjectList($list)
+      ->setNoDataString(pht('No versions found.'));
+  }
+
+}

src/applications/packages/query/PhabricatorPackagesVersionTransactionQuery.php

@@ -0,0 +1,10 @@
+<?php
+
+final class PhabricatorPackagesVersionTransactionQuery
+  extends PhabricatorApplicationTransactionQuery {
+
+  public function getTemplateApplicationTransaction() {
+    return new PhabricatorPackagesVersionTransaction();
+  }
+
+}

src/applications/packages/storage/PhabricatorPackagesPackage.php

@@ -154,7 +154,21 @@ final class PhabricatorPackagesPackage
 
   public function destroyObjectPermanently(
     PhabricatorDestructionEngine $engine) {
-    $this->delete();
+    $viewer = $engine->getViewer();
+
+    $this->openTransaction();
+
+      $versions = id(new PhabricatorPackagesVersionQuery())
+        ->setViewer($viewer)
+        ->withPackagePHIDs(array($this->getPHID()))
+        ->execute();
+      foreach ($versions as $version) {
+        $engine->destroyObject($version);
+      }
+
+      $this->delete();
+
+    $this->saveTransaction();
   }
 
 

src/applications/packages/storage/PhabricatorPackagesVersion.php

@@ -0,0 +1,200 @@
+<?php
+
+final class PhabricatorPackagesVersion
+  extends PhabricatorPackagesDAO
+  implements
+    PhabricatorPolicyInterface,
+    PhabricatorExtendedPolicyInterface,
+    PhabricatorApplicationTransactionInterface,
+    PhabricatorDestructibleInterface,
+    PhabricatorSubscribableInterface,
+    PhabricatorProjectInterface,
+    PhabricatorConduitResultInterface {
+
+  protected $name;
+  protected $packagePHID;
+
+  private $package;
+
+  public static function initializeNewVersion(PhabricatorUser $actor) {
+    return id(new self());
+  }
+
+  protected function getConfiguration() {
+    return array(
+      self::CONFIG_AUX_PHID => true,
+      self::CONFIG_COLUMN_SCHEMA => array(
+        'name' => 'sort64',
+      ),
+      self::CONFIG_KEY_SCHEMA => array(
+        'key_package' => array(
+          'columns' => array('packagePHID', 'name'),
+          'unique' => true,
+        ),
+      ),
+    ) + parent::getConfiguration();
+  }
+
+  public function generatePHID() {
+    return PhabricatorPHID::generateNewPHID(
+      PhabricatorPackagesVersionPHIDType::TYPECONST);
+  }
+
+  public function getURI() {
+    $package = $this->getPackage();
+    $full_key = $package->getFullKey();
+    $name = $this->getName();
+
+    return "/package/{$full_key}/{$name}/";
+  }
+
+  public function attachPackage(PhabricatorPackagesPackage $package) {
+    $this->package = $package;
+    return $this;
+  }
+
+  public function getPackage() {
+    return $this->assertAttached($this->package);
+  }
+
+  public static function assertValidVersionName($value) {
+    $length = phutil_utf8_strlen($value);
+    if (!$length) {
+      throw new Exception(
+        pht(
+          'Version name "%s" is not valid: version names are required.',
+          $value));
+    }
+
+    $max_length = 64;
+    if ($length > $max_length) {
+      throw new Exception(
+        pht(
+          'Version name "%s" is not valid: version names must not be '.
+          'more than %s characters long.',
+          $value,
+          new PhutilNumber($max_length)));
+    }
+
+    if (!preg_match('/^[A-Za-z0-9.-]+\z/', $value)) {
+      throw new Exception(
+        pht(
+          'Version name "%s" is not valid: version names may only contain '.
+          'latin letters, digits, periods, and hyphens.',
+          $value));
+    }
+
+    if (preg_match('/^[.-]|[.-]$/', $value)) {
+      throw new Exception(
+        pht(
+          'Version name "%s" is not valid: version names may not start or '.
+          'end with a period or hyphen.',
+          $value));
+    }
+  }
+
+
+/* -(  PhabricatorSubscribableInterface  )----------------------------------- */
+
+
+  public function isAutomaticallySubscribed($phid) {
+    return false;
+  }
+
+
+/* -(  Policy Interface  )--------------------------------------------------- */
+
+
+  public function getCapabilities() {
+    return array(
+      PhabricatorPolicyCapability::CAN_VIEW,
+      PhabricatorPolicyCapability::CAN_EDIT,
+    );
+  }
+
+  public function getPolicy($capability) {
+    switch ($capability) {
+      case PhabricatorPolicyCapability::CAN_VIEW:
+        return PhabricatorPolicies::getMostOpenPolicy();
+      case PhabricatorPolicyCapability::CAN_EDIT:
+        return PhabricatorPolicies::POLICY_USER;
+    }
+  }
+
+  public function hasAutomaticCapability($capability, PhabricatorUser $user) {
+    return false;
+  }
+
+  public function describeAutomaticCapability($capability) {
+    return null;
+  }
+
+
+/* -(  PhabricatorExtendedPolicyInterface  )--------------------------------- */
+
+
+  public function getExtendedPolicy($capability, PhabricatorUser $viewer) {
+    return array(
+      array(
+        $this->getPackage(),
+        $capability,
+      ),
+    );
+  }
+
+
+/* -(  PhabricatorDestructibleInterface  )----------------------------------- */
+
+
+  public function destroyObjectPermanently(
+    PhabricatorDestructionEngine $engine) {
+    $this->delete();
+  }
+
+
+/* -(  PhabricatorApplicationTransactionInterface  )------------------------- */
+
+
+  public function getApplicationTransactionEditor() {
+    return new PhabricatorPackagesVersionEditor();
+  }
+
+  public function getApplicationTransactionObject() {
+    return $this;
+  }
+
+  public function getApplicationTransactionTemplate() {
+    return new PhabricatorPackagesVersionTransaction();
+  }
+
+  public function willRenderTimeline(
+    PhabricatorApplicationTransactionView $timeline,
+    AphrontRequest $request) {
+    return $timeline;
+  }
+
+
+/* -(  PhabricatorConduitResultInterface  )---------------------------------- */
+
+
+  public function getFieldSpecificationsForConduit() {
+    return array(
+      id(new PhabricatorConduitSearchFieldSpecification())
+        ->setKey('name')
+        ->setType('string')
+        ->setDescription(pht('The name of the version.')),
+    );
+  }
+
+  public function getFieldValuesForConduit() {
+    return array(
+      'name' => $this->getName(),
+    );
+  }
+
+  public function getConduitSearchAttachments() {
+    return array();
+  }
+
+
+}

src/applications/packages/storage/PhabricatorPackagesVersionTransaction.php

@@ -0,0 +1,18 @@
+<?php
+
+final class PhabricatorPackagesVersionTransaction
+  extends PhabricatorModularTransaction {
+
+  public function getApplicationName() {
+    return 'packages';
+  }
+
+  public function getApplicationTransactionType() {
+    return PhabricatorPackagesVersionPHIDType::TYPECONST;
+  }
+
+  public function getBaseTransactionClass() {
+    return 'PhabricatorPackagesVersionTransactionType';
+  }
+
+}

src/applications/packages/typeahead/PhabricatorPackagesPackageDatasource.php

@@ -0,0 +1,35 @@
+<?php
+
+final class PhabricatorPackagesPackageDatasource
+  extends PhabricatorTypeaheadDatasource {
+
+  public function getBrowseTitle() {
+    return pht('Browse Packagess');
+  }
+
+  public function getPlaceholderText() {
+    return pht('Type a package name...');
+  }
+
+  public function getDatasourceApplicationClass() {
+    return 'PhabricatorPackagesApplication';
+  }
+
+  public function loadResults() {
+    $viewer = $this->getViewer();
+    $raw_query = $this->getRawQuery();
+
+    $package_query = id(new PhabricatorPackagesPackageQuery());
+    $packages = $this->executeQuery($package_query);
+
+    $results = array();
+    foreach ($packages as $package) {
+      $results[] = id(new PhabricatorTypeaheadResult())
+        ->setName($package->getName())
+        ->setPHID($package->getPHID());
+    }
+
+    return $this->filterResultsAgainstTokens($results);
+  }
+
+}

src/applications/packages/xaction/package/PhabricatorPackagesPackagePublisherTransaction.php

@@ -16,7 +16,8 @@ final class PhabricatorPackagesPackagePublisherTransaction
   public function validateTransactions($object, array $xactions) {
     $errors = array();
 
-    if ($this->isEmptyTextTransaction($object->getName(), $xactions)) {
+    $current_value = $object->getPublisherPHID();
+    if ($this->isEmptyTextTransaction($current_value, $xactions)) {
       $errors[] = $this->newRequiredError(
         pht(
           'You must select a publisher when creating a package.'));

src/applications/packages/xaction/version/PhabricatorPackagesVersionNameTransaction.php

@@ -0,0 +1,62 @@
+<?php
+
+final class PhabricatorPackagesVersionNameTransaction
+  extends PhabricatorPackagesVersionTransactionType {
+
+  const TRANSACTIONTYPE = 'packages.version.name';
+
+  public function generateOldValue($object) {
+    return $object->getName();
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $object->setName($value);
+  }
+
+  public function getTitle() {
+    return pht(
+      '%s changed the name of this version from %s to %s.',
+      $this->renderAuthor(),
+      $this->renderOldValue(),
+      $this->renderNewValue());
+  }
+
+  public function getTitleForFeed() {
+    return pht(
+      '%s updated the name for %s from %s to %s.',
+      $this->renderAuthor(),
+      $this->renderObject(),
+      $this->renderOldValue(),
+      $this->renderNewValue());
+  }
+
+  public function validateTransactions($object, array $xactions) {
+    $errors = array();
+
+    if ($this->isEmptyTextTransaction($object->getName(), $xactions)) {
+      $errors[] = $this->newRequiredError(
+        pht('Versions must have a name.'));
+      return $errors;
+    }
+
+    foreach ($xactions as $xaction) {
+      $value = $xaction->getNewValue();
+      try {
+        PhabricatorPackagesVersion::assertValidVersionName($value);
+      } catch (Exception $ex) {
+        $errors[] = $this->newInvalidError($ex->getMessage(), $xaction);
+      }
+    }
+
+    if (!$this->isNewObject()) {
+      foreach ($xactions as $xaction) {
+        $errors[] = $this->newInvalidError(
+          pht('Once a version is created, its name can not be changed.'),
+          $xaction);
+      }
+    }
+
+    return $errors;
+  }
+
+}

src/applications/packages/xaction/version/PhabricatorPackagesVersionPackageTransaction.php

@@ -0,0 +1,66 @@
+<?php
+
+final class PhabricatorPackagesVersionPackageTransaction
+  extends PhabricatorPackagesVersionTransactionType {
+
+  const TRANSACTIONTYPE = 'packages.version.package';
+
+  public function generateOldValue($object) {
+    return $object->getPackagePHID();
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $object->setPackagePHID($value);
+  }
+
+  public function validateTransactions($object, array $xactions) {
+    $errors = array();
+
+    if ($this->isEmptyTextTransaction($object->getPackagePHID(), $xactions)) {
+      $errors[] = $this->newRequiredError(
+        pht(
+          'You must select a package when creating a version'));
+      return $errors;
+    }
+
+    if (!$this->isNewObject()) {
+      foreach ($xactions as $xaction) {
+        $errors[] = $this->newInvalidError(
+          pht('Once a version is created, its package can not be changed.'),
+          $xaction);
+      }
+    }
+
+    $viewer = $this->getActor();
+    foreach ($xactions as $xaction) {
+      $package_phid = $xaction->getNewValue();
+
+      $package = id(new PhabricatorPackagesPackageQuery())
+        ->setViewer($viewer)
+        ->withPHIDs(array($package_phid))
+        ->setRaisePolicyExceptions(false)
+        ->requireCapabilities(
+          array(
+            PhabricatorPolicyCapability::CAN_VIEW,
+            PhabricatorPolicyCapability::CAN_EDIT,
+          ))
+        ->executeOne();
+
+      if (!$package) {
+        $errors[] = $this->newInvalidError(
+          pht(
+            'Package "%s" is invalid: the package must exist and you '.
+            'must have permission to edit it in order to create a new '.
+            'package.',
+            $package_phid),
+          $xaction);
+        continue;
+      }
+
+      $object->attachPackage($package);
+    }
+
+    return $errors;
+  }
+
+}

src/applications/packages/xaction/version/PhabricatorPackagesVersionTransactionType.php

@@ -0,0 +1,4 @@
+<?php
+
+abstract class PhabricatorPackagesVersionTransactionType
+  extends PhabricatorPackagesTransactionType {}