Use Application PHIDs for ANSW

Summary:
Ref T2715. Ref T3578.

  - Use Application PHIDs for Ponder Answers.
  - Make Ponder answers policy-aware.
  - Make PonderAnswerQuery policy-aware.

Test Plan: Used `phid.query`; browsed Ponder.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2715, T3578

Differential Revision: https://secure.phabricator.com/D6582

src/__phutil_library_map__.php

@@ -1889,6 +1889,7 @@ phutil_register_library_map(array(
     'PonderLiterals' => 'applications/ponder/constants/PonderLiterals.php',
     'PonderMail' => 'applications/ponder/mail/PonderMail.php',
     'PonderMentionMail' => 'applications/ponder/mail/PonderMentionMail.php',
+    'PonderPHIDTypeAnswer' => 'applications/ponder/phid/PonderPHIDTypeAnswer.php',
     'PonderPHIDTypeQuestion' => 'applications/ponder/phid/PonderPHIDTypeQuestion.php',
     'PonderPostBodyView' => 'applications/ponder/view/PonderPostBodyView.php',
     'PonderQuestion' => 'applications/ponder/storage/PonderQuestion.php',
@@ -3984,11 +3985,12 @@ phutil_register_library_map(array(
       0 => 'PonderDAO',
       1 => 'PhabricatorMarkupInterface',
       2 => 'PonderVotableInterface',
+      3 => 'PhabricatorPolicyInterface',
     ),
     'PonderAnswerEditor' => 'PhabricatorEditor',
     'PonderAnswerListView' => 'AphrontView',
     'PonderAnswerPreviewController' => 'PonderController',
-    'PonderAnswerQuery' => 'PhabricatorOffsetPagedQuery',
+    'PonderAnswerQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'PonderAnswerSaveController' => 'PonderController',
     'PonderAnswerViewController' => 'PonderController',
     'PonderAnsweredMail' => 'PonderMail',
@@ -4007,6 +4009,7 @@ phutil_register_library_map(array(
     'PonderLiterals' => 'PonderConstants',
     'PonderMail' => 'PhabricatorMail',
     'PonderMentionMail' => 'PonderMail',
+    'PonderPHIDTypeAnswer' => 'PhabricatorPHIDType',
     'PonderPHIDTypeQuestion' => 'PhabricatorPHIDType',
     'PonderPostBodyView' => 'AphrontView',
     'PonderQuestion' =>

src/applications/phid/PhabricatorPHIDConstants.php

@@ -12,7 +12,6 @@ final class PhabricatorPHIDConstants {
   const PHID_TYPE_OASC    = 'OASC';
   const PHID_TYPE_OASA    = 'OASA';
   const PHID_TYPE_TOBJ    = 'TOBJ';
-  const PHID_TYPE_ANSW    = 'ANSW';
   const PHID_TYPE_ACNT    = 'ACNT';
   const PHID_TYPE_PDCT    = 'PDCT';
   const PHID_TYPE_PRCH    = 'PRCH';

src/applications/ponder/phid/PonderPHIDTypeAnswer.php

@@ -0,0 +1,45 @@
+<?php
+
+final class PonderPHIDTypeAnswer extends PhabricatorPHIDType {
+
+  const TYPECONST = 'ANSW';
+
+  public function getTypeConstant() {
+    return self::TYPECONST;
+  }
+
+  public function getTypeName() {
+    return pht('Answer');
+  }
+
+  public function newObject() {
+    return new PonderAnswer();
+  }
+
+  public function loadObjects(
+    PhabricatorObjectQuery $query,
+    array $phids) {
+
+    return id(new PonderAnswerQuery())
+      ->setViewer($query->getViewer())
+      ->withPHIDs($phids)
+      ->execute();
+  }
+
+  public function loadHandles(
+    PhabricatorHandleQuery $query,
+    array $handles,
+    array $objects) {
+
+    foreach ($handles as $phid => $handle) {
+      $answer = $objects[$phid];
+
+      $id = $answer->getID();
+      $qid = $answer->getQuestionID();
+
+      $handle->setName("Answer {$id}");
+      $handle->setURI("/Q{$qid}#A{$id}");
+    }
+  }
+
+}

src/applications/ponder/query/PonderAnswerQuery.php

@@ -1,27 +1,13 @@
 <?php
 
-final class PonderAnswerQuery extends PhabricatorOffsetPagedQuery {
+final class PonderAnswerQuery
+  extends PhabricatorCursorPagedPolicyAwareQuery {
 
   private $ids;
   private $phids;
   private $authorPHIDs;
   private $questionIDs;
 
-  private $viewer;
-
-  public function setViewer(PhabricatorUser $viewer) {
-    $this->viewer = $viewer;
-    return $this;
-  }
-
-  public function getViewer() {
-    return $this->viewer;
-  }
-
-  public function executeOne() {
-    return head($this->execute());
-  }
-
   public function withIDs(array $ids) {
     $this->ids = $ids;
     return $this;
@@ -66,14 +52,12 @@ final class PonderAnswerQuery extends PhabricatorOffsetPagedQuery {
         $this->authorPHIDs);
     }
 
+    $where[] = $this->buildPagingClause($conn_r);
+
     return $this->formatWhereClause($where);
   }
 
-  private function buildOrderByClause($conn_r) {
-    return 'ORDER BY id ASC';
-  }
-
-  public function execute() {
+  public function loadPage() {
     $answer = new PonderAnswer();
     $conn_r = $answer->establishConnection('r');
 
@@ -82,12 +66,13 @@ final class PonderAnswerQuery extends PhabricatorOffsetPagedQuery {
       'SELECT a.* FROM %T a %Q %Q %Q',
       $answer->getTableName(),
       $this->buildWhereClause($conn_r),
-      $this->buildOrderByClause($conn_r),
+      $this->buildOrderClause($conn_r),
       $this->buildLimitClause($conn_r));
 
-    $answers = $answer->loadAllFromArray($data);
+    return $answer->loadAllFromArray($data);
+  }
 
-    if ($answers) {
+  public function willFilterPage(array $answers) {
     $questions = id(new PonderQuestionQuery())
       ->setViewer($this->getViewer())
       ->withIDs(mpull($answers, 'getQuestionID'))
@@ -97,8 +82,12 @@ final class PonderAnswerQuery extends PhabricatorOffsetPagedQuery {
       $question = idx($questions, $answer->getQuestionID());
       $answer->attachQuestion($question);
     }
-    }
 
     return $answers;
   }
+
+  protected function getReversePaging() {
+    return true;
+  }
+
 }

src/applications/ponder/storage/PonderAnswer.php

@@ -1,11 +1,13 @@
 <?php
 
 final class PonderAnswer extends PonderDAO
-  implements PhabricatorMarkupInterface, PonderVotableInterface {
+  implements
+    PhabricatorMarkupInterface,
+    PonderVotableInterface,
+    PhabricatorPolicyInterface {
 
   const MARKUP_FIELD_CONTENT = 'markup:content';
 
-  protected $phid;
   protected $authorPHID;
   protected $questionID;
 
@@ -60,7 +62,7 @@ final class PonderAnswer extends PonderDAO
 
   public function generatePHID() {
     return PhabricatorPHID::generateNewPHID(
-      PhabricatorPHIDConstants::PHID_TYPE_ANSW);
+      PonderPHIDTypeAnswer::TYPECONST);
   }
 
   public function setContentSource(PhabricatorContentSource $content_source) {
@@ -111,4 +113,36 @@ final class PonderAnswer extends PonderDAO
   public function getVotablePHID() {
     return $this->getPHID();
   }
+
+
+/* -(  PhabricatorPolicyInterface  )----------------------------------------- */
+
+
+  public function getCapabilities() {
+    return array(
+      PhabricatorPolicyCapability::CAN_VIEW,
+      PhabricatorPolicyCapability::CAN_EDIT,
+    );
+  }
+
+  public function getPolicy($capability) {
+    switch ($capability) {
+      case PhabricatorPolicyCapability::CAN_VIEW:
+        return $this->getQuestion()->getPolicy($capability);
+      case PhabricatorPolicyCapability::CAN_EDIT:
+        return PhabricatorPolicies::POLICY_NOONE;
+    }
+  }
+
+  public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
+    switch ($capability) {
+      case PhabricatorPolicyCapability::CAN_VIEW:
+        return $this->getQuestion()->hasAutomaticCapability(
+          $capability,
+          $viewer);
+      case PhabricatorPolicyCapability::CAN_EDIT:
+        return ($this->getAuthorPHID() == $viewer->getPHID());
+    }
+  }
+
 }

src/applications/ponder/storage/PonderQuestion.php

@@ -172,6 +172,7 @@ final class PonderQuestion extends PonderDAO
   public function getCapabilities() {
     return array(
       PhabricatorPolicyCapability::CAN_VIEW,
+      PhabricatorPolicyCapability::CAN_EDIT,
     );
   }
 
@@ -188,7 +189,7 @@ final class PonderQuestion extends PonderDAO
   }
 
   public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
-    return false;
+    return ($viewer->getPHID() == $this->getAuthorPHID());
   }
 
 /* -(  PhabricatorTokenReceiverInterface  )---------------------------------- */

src/infrastructure/edges/constants/PhabricatorEdgeConfig.php

@@ -155,7 +155,6 @@ final class PhabricatorEdgeConfig extends PhabricatorEdgeConstants {
 
     static $class_map = array(
       PhabricatorPHIDConstants::PHID_TYPE_TOBJ  => 'HarbormasterObject',
-      PhabricatorPHIDConstants::PHID_TYPE_ANSW  => 'PonderAnswer',
       PhabricatorPHIDConstants::PHID_TYPE_ACNT  => 'PhortuneAccount',
       PhabricatorPHIDConstants::PHID_TYPE_PRCH  => 'PhortunePurchase',
       PhabricatorPHIDConstants::PHID_TYPE_CHRG  => 'PhortuneCharge',