Add DoorkeeperObjectRef, DoorkeeperBridge, DoorkeeperBridgeAsana

Summary:
  - `DoorkeeperObjectRef` is a convenience object to keep track of `<applicationType, applicationDomain, objectType, objectID>` tuples.
  - `DoorkeeperBridge` provides pull/push between Phabricator and external systems.
  - `DoorkeeperBridgeAsana` is a bridge to Asana.

Test Plan:
Ran this snippet and got a task from Asana:

{P871}

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D6273

src/__phutil_library_map__.php

@@ -533,8 +533,11 @@ phutil_register_library_map(array(
     'DivinerRenderer' => 'applications/diviner/renderer/DivinerRenderer.php',
     'DivinerStaticPublisher' => 'applications/diviner/publisher/DivinerStaticPublisher.php',
     'DivinerWorkflow' => 'applications/diviner/workflow/DivinerWorkflow.php',
+    'DoorkeeperBridge' => 'applications/doorkeeper/bridge/DoorkeeperBridge.php',
+    'DoorkeeperBridgeAsana' => 'applications/doorkeeper/bridge/DoorkeeperBridgeAsana.php',
     'DoorkeeperDAO' => 'applications/doorkeeper/storage/DoorkeeperDAO.php',
     'DoorkeeperExternalObject' => 'applications/doorkeeper/storage/DoorkeeperExternalObject.php',
+    'DoorkeeperObjectRef' => 'applications/doorkeeper/engine/DoorkeeperObjectRef.php',
     'DrydockAllocatorWorker' => 'applications/drydock/worker/DrydockAllocatorWorker.php',
     'DrydockApacheWebrootInterface' => 'applications/drydock/interface/webroot/DrydockApacheWebrootInterface.php',
     'DrydockBlueprint' => 'applications/drydock/blueprint/DrydockBlueprint.php',
@@ -2406,12 +2409,15 @@ phutil_register_library_map(array(
     'DivinerRemarkupRuleSymbol' => 'PhutilRemarkupRule',
     'DivinerStaticPublisher' => 'DivinerPublisher',
     'DivinerWorkflow' => 'PhutilArgumentWorkflow',
+    'DoorkeeperBridge' => 'Phobject',
+    'DoorkeeperBridgeAsana' => 'DoorkeeperBridge',
     'DoorkeeperDAO' => 'PhabricatorLiskDAO',
     'DoorkeeperExternalObject' =>
     array(
       0 => 'DoorkeeperDAO',
       1 => 'PhabricatorPolicyInterface',
     ),
+    'DoorkeeperObjectRef' => 'Phobject',
     'DrydockAllocatorWorker' => 'PhabricatorWorker',
     'DrydockApacheWebrootInterface' => 'DrydockWebrootInterface',
     'DrydockCommandInterface' => 'DrydockInterface',

src/applications/auth/provider/PhabricatorAuthProviderOAuth.php

@@ -281,4 +281,12 @@ abstract class PhabricatorAuthProviderOAuth extends PhabricatorAuthProvider {
     return parent::renderConfigPropertyTransactionTitle($xaction);
   }
 
+  protected function willSaveAccount(PhabricatorExternalAccount $account) {
+    parent::willSaveAccount($account);
+
+    $oauth_token = $this->getAdapter()->getAccessToken();
+    $account->setProperty('oauth.token', $oauth_token);
+
+  }
+
 }

src/applications/auth/provider/PhabricatorAuthProviderOAuthAsana.php

@@ -35,4 +35,16 @@ final class PhabricatorAuthProviderOAuthAsana
     return 'Asana';
   }
 
+  public static function getAsanaProvider() {
+    $providers = self::getAllEnabledProviders();
+
+    foreach ($providers as $provider) {
+      if ($provider instanceof PhabricatorAuthProviderOAuthAsana) {
+        return $provider;
+      }
+    }
+
+    return null;
+  }
+
 }

src/applications/doorkeeper/bridge/DoorkeeperBridge.php

@@ -0,0 +1,23 @@
+<?php
+
+abstract class DoorkeeperBridge extends Phobject {
+
+  private $viewer;
+
+  final public function setViewer($viewer) {
+    $this->viewer = $viewer;
+    return $this;
+  }
+
+  final public function getViewer() {
+    return $this->viewer;
+  }
+
+  public function isEnabled() {
+    return true;
+  }
+
+  abstract public function canPullRef(DoorkeeperObjectRef $ref);
+  abstract public function pullRefs(array $refs);
+
+}

src/applications/doorkeeper/bridge/DoorkeeperBridgeAsana.php

@@ -0,0 +1,79 @@
+<?php
+
+final class DoorkeeperBridgeAsana extends DoorkeeperBridge {
+
+  public function canPullRef(DoorkeeperObjectRef $ref) {
+    return ($ref->getApplicationType() == 'asana') &&
+           ($ref->getApplicationDomain() == 'asana.com') &&
+           ($ref->getObjectType() == 'asana:task');
+  }
+
+  public function pullRefs(array $refs) {
+
+    $id_map = mpull($refs, 'getObjectID', 'getObjectKey');
+    $viewer = $this->getViewer();
+
+    $provider = PhabricatorAuthProviderOAuthAsana::getAsanaProvider();
+    if (!$provider) {
+      return;
+    }
+
+    $accounts = id(new PhabricatorExternalAccountQuery())
+      ->setViewer($viewer)
+      ->withUserPHIDs(array($viewer->getPHID()))
+      ->withAccountTypes(array($provider->getProviderType()))
+      ->withAccountDomains(array($provider->getProviderDomain()))
+      ->execute();
+
+    // TODO: If the user has several linked Asana accounts, we just pick the
+    // first one arbitrarily. We might want to try using all of them or do
+    // something with more finesse. There's no UI way to link multiple accounts
+    // right now so this is currently moot.
+    $account = head($accounts);
+
+    $token = $account->getProperty('oauth.token');
+    if (!$token) {
+      return;
+    }
+
+    $template = id(new PhutilAsanaFuture())
+      ->setAccessToken($token);
+
+    $futures = array();
+    foreach ($id_map as $key => $id) {
+      $futures[$key] = id(clone $template)
+        ->setRawAsanaQuery("tasks/{$id}");
+    }
+
+    $results = array();
+    foreach (Futures($futures) as $key => $future) {
+      $results[$key] = $future->resolve();
+    }
+
+    foreach ($refs as $ref) {
+      $result = idx($results, $ref->getObjectKey());
+      if (!$result) {
+        continue;
+      }
+
+      $ref->setIsVisible(true);
+      $ref->setAttribute('asana.data', $result);
+      $ref->setAttribute('name', $result['name']);
+      $ref->setAttribute('description', $result['notes']);
+
+      $obj = $ref->getExternalObject();
+      if ($obj->getID()) {
+        continue;
+      }
+
+      $id = $result['id'];
+      $uri = "https://app.asana.com/0/{$id}/{$id}";
+      $obj->setObjectURI($uri);
+
+      $unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
+        $obj->save();
+      unset($unguarded);
+    }
+  }
+
+}

src/applications/doorkeeper/engine/DoorkeeperObjectRef.php

@@ -0,0 +1,109 @@
+<?php
+
+final class DoorkeeperObjectRef extends Phobject {
+
+  private $objectKey;
+  private $applicationType;
+  private $applicationDomain;
+  private $objectType;
+  private $objectID;
+  private $attributes = array();
+  private $isVisible;
+  private $externalObject;
+
+  public function newExternalObject() {
+    return id(new DoorkeeperExternalObject())
+      ->setApplicationType($this->getApplicationType())
+      ->setApplicationDomain($this->getApplicationDomain())
+      ->setObjectType($this->getObjectType())
+      ->setObjectID($this->getObjectID())
+      ->setViewPolicy(PhabricatorPolicies::POLICY_USER);
+  }
+
+  public function attachExternalObject(
+    DoorkeeperExternalObject $external_object) {
+    $this->externalObject = $external_object;
+    return $this;
+  }
+
+  public function getExternalObject() {
+    if (!$this->externalObject) {
+      throw new Exception(
+        "Call attachExternalObject() before getExternalObject()!");
+    }
+    return $this->externalObject;
+  }
+
+  public function setIsVisible($is_visible) {
+    $this->isVisible = $is_visible;
+    return $this;
+  }
+
+  public function getIsVisible() {
+    return $this->isVisible;
+  }
+
+  public function getAttribute($key, $default = null) {
+    return idx($this->attribute, $key, $default);
+  }
+
+  public function setAttribute($key, $value) {
+    $this->attributes[$key] = $value;
+    return $this;
+  }
+
+  public function setObjectID($object_id) {
+    $this->objectID = $object_id;
+    return $this;
+  }
+
+  public function getObjectID() {
+    return $this->objectID;
+  }
+
+
+  public function setObjectType($object_type) {
+    $this->objectType = $object_type;
+    return $this;
+  }
+
+  public function getObjectType() {
+    return $this->objectType;
+  }
+
+
+  public function setApplicationDomain($application_domain) {
+    $this->applicationDomain = $application_domain;
+    return $this;
+  }
+
+  public function getApplicationDomain() {
+    return $this->applicationDomain;
+  }
+
+
+  public function setApplicationType($application_type) {
+    $this->applicationType = $application_type;
+    return $this;
+  }
+
+  public function getApplicationType() {
+    return $this->applicationType;
+  }
+
+  public function getObjectKey() {
+    if (!$this->objectKey) {
+      $this->objectKey = PhabricatorHash::digestForIndex(
+        implode(
+          ':',
+          array(
+            $this->getApplicationType(),
+            $this->getApplicationDomain(),
+            $this->getObjectType(),
+            $this->getObjectID(),
+          )));
+    }
+    return $this->objectKey;
+  }
+
+}

src/applications/doorkeeper/storage/DoorkeeperExternalObject.php

@@ -39,15 +39,12 @@ final class DoorkeeperExternalObject extends DoorkeeperDAO
   public function getObjectKey() {
     $key = parent::getObjectKey();
     if ($key === null) {
-      $key = PhabricatorHash::digestForIndex(
-        implode(
-          ':',
-          array(
-            $this->getApplicationType(),
-            $this->getApplicationDomain(),
-            $this->getObjectType(),
-            $this->getObjectID(),
-          )));
+      $key = id(new DoorkeeperObjectRef())
+        ->setApplicationType($this->getApplicationType())
+        ->setApplicationDomain($this->getApplicationDomain())
+        ->setObjectType($this->getObjectType())
+        ->setObjectID($this->getObjectID())
+        ->getObjectKey();
     }
     return $key;
   }
@@ -56,6 +53,7 @@ final class DoorkeeperExternalObject extends DoorkeeperDAO
     if (!$this->objectKey) {
       $this->objectKey = $this->getObjectKey();
     }
+
     return parent::save();
   }