Have EditEngine API methods provide the correct application to Conduit

Summary:
Fixes T9799. Currently, if you can't see an application like Paste, we fatal when trying to generate a result for `conduit.query`, because the new EditEngine-based `paste.edit` method doesn't "know" that it's a "Paste" method.

Straighten this out, and use policies and queries a little more correctly/consistently.

Test Plan:
  - Called `conduit.query` as a user who does not have permission to use Paste.
  - Before change: fatal.
  - After change: results, excluding "paste.*" methods.

Reviewers: chad

Reviewed By: chad

Subscribers: cburroughs

Maniphest Tasks: T9799

Differential Revision: https://secure.phabricator.com/D14492

src/applications/conduit/method/ConduitQueryConduitAPIMethod.php

@@ -19,20 +19,20 @@ final class ConduitQueryConduitAPIMethod extends ConduitAPIMethod {
   }
 
   protected function execute(ConduitAPIRequest $request) {
-    $classes = id(new PhutilClassMapQuery())
-      ->setAncestorClass('ConduitAPIMethod')
+    $methods = id(new PhabricatorConduitMethodQuery())
+      ->setViewer($request->getUser())
       ->execute();
 
-    $names_to_params = array();
-    foreach ($classes as $class) {
-      $names_to_params[$class->getAPIMethodName()] = array(
-        'description' => $class->getMethodDescription(),
-        'params' => $class->getParamTypes(),
-        'return' => $class->getReturnType(),
+    $map = array();
+    foreach ($methods as $method) {
+      $map[$method->getAPIMethodName()] = array(
+        'description' => $method->getMethodDescription(),
+        'params' => $method->getParamTypes(),
+        'return' => $method->getReturnType(),
       );
     }
 
-    return $names_to_params;
+    return $map;
   }
 
 }

src/applications/conduit/query/PhabricatorConduitMethodQuery.php

@@ -115,6 +115,43 @@ final class PhabricatorConduitMethodQuery
     return $methods;
   }
 
+  protected function willFilterPage(array $methods) {
+    $application_phids = array();
+    foreach ($methods as $method) {
+      $application = $method->getApplication();
+      if ($application === null) {
+        continue;
+      }
+      $application_phids[] = $application->getPHID();
+    }
+
+    if ($application_phids) {
+      $applications = id(new PhabricatorApplicationQuery())
+        ->setParentQuery($this)
+        ->setViewer($this->getViewer())
+        ->withPHIDs($application_phids)
+        ->execute();
+      $applications = mpull($applications, null, 'getPHID');
+    } else {
+      $applications = array();
+    }
+
+    // Remove methods which belong to an application the viewer can not see.
+    foreach ($methods as $key => $method) {
+      $application = $method->getApplication();
+      if ($application === null) {
+        continue;
+      }
+
+      if (empty($applications[$application->getPHID()])) {
+        $this->didRejectResult($method);
+        unset($methods[$key]);
+      }
+    }
+
+    return $methods;
+  }
+
   public function getQueryApplicationClass() {
     return 'PhabricatorConduitApplication';
   }

src/applications/paste/editor/PhabricatorPasteEditEngine.php

@@ -9,6 +9,10 @@ final class PhabricatorPasteEditEngine
     return pht('Pastes');
   }
 
+  public function getEngineApplicationClass() {
+    return 'PhabricatorPasteApplication';
+  }
+
   protected function newEditableObject() {
     return PhabricatorPaste::initializeNewPaste($this->getViewer());
   }

src/applications/transactions/editengine/PhabricatorEditEngine.php

@@ -50,6 +50,7 @@ abstract class PhabricatorEditEngine
 /* -(  Managing Fields  )---------------------------------------------------- */
 
 
+  abstract public function getEngineApplicationClass();
   abstract protected function buildCustomEditFields($object);
 
   final protected function buildEditFields($object) {

src/applications/transactions/editengine/PhabricatorEditEngineAPIMethod.php

@@ -5,6 +5,12 @@ abstract class PhabricatorEditEngineAPIMethod
 
   abstract public function newEditEngine();
 
+  public function getApplication() {
+    $engine = $this->newEditEngine();
+    $class = $engine->getEngineApplicationClass();
+    return PhabricatorApplication::getByClass($class);
+  }
+
   public function getMethodStatus() {
     return self::METHOD_STATUS_UNSTABLE;
   }

src/applications/transactions/editor/PhabricatorEditEngineConfigurationEditEngine.php

@@ -20,6 +20,10 @@ final class PhabricatorEditEngineConfigurationEditEngine
     return pht('Edit Configurations');
   }
 
+  public function getEngineApplicationClass() {
+    return 'PhabricatorTransactionsApplication';
+  }
+
   protected function newEditableObject() {
     return PhabricatorEditEngineConfiguration::initializeNewConfiguration(
       $this->getViewer(),