Allow ponder answers to be edited

Summary:
Ref T3373. Use applicationtransactions to edit ponder answers.

Also enable tokens and subscriptions.

Test Plan: edited an answer

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T3373

Differential Revision: https://secure.phabricator.com/D6607

src/__phutil_library_map__.php

@@ -1870,6 +1870,7 @@ phutil_register_library_map(array(
     'PonderAddAnswerView' => 'applications/ponder/view/PonderAddAnswerView.php',
     'PonderAddCommentView' => 'applications/ponder/view/PonderAddCommentView.php',
     'PonderAnswer' => 'applications/ponder/storage/PonderAnswer.php',
+    'PonderAnswerEditController' => 'applications/ponder/controller/PonderAnswerEditController.php',
     'PonderAnswerEditor' => 'applications/ponder/editor/PonderAnswerEditor.php',
     'PonderAnswerListView' => 'applications/ponder/view/PonderAnswerListView.php',
     'PonderAnswerPreviewController' => 'applications/ponder/controller/PonderAnswerPreviewController.php',
@@ -3990,8 +3991,11 @@ phutil_register_library_map(array(
       1 => 'PhabricatorMarkupInterface',
       2 => 'PonderVotableInterface',
       3 => 'PhabricatorPolicyInterface',
+      4 => 'PhabricatorSubscribableInterface',
+      5 => 'PhabricatorTokenReceiverInterface',
     ),
-    'PonderAnswerEditor' => 'PhabricatorEditor',
+    'PonderAnswerEditController' => 'PonderController',
+    'PonderAnswerEditor' => 'PhabricatorApplicationTransactionEditor',
     'PonderAnswerListView' => 'AphrontView',
     'PonderAnswerPreviewController' => 'PonderController',
     'PonderAnswerQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',

src/applications/ponder/application/PhabricatorApplicationPonder.php

@@ -51,6 +51,7 @@ final class PhabricatorApplicationPonder extends PhabricatorApplication {
       '/ponder/' => array(
         '(?:query/(?P<queryKey>[^/]+)/)?' => 'PonderQuestionListController',
         'answer/add/' => 'PonderAnswerSaveController',
+        'answer/edit/(?P<id>\d+)/' => 'PonderAnswerEditController',
         'answer/preview/' => 'PonderAnswerPreviewController',
         'question/edit/(?:(?P<id>\d+)/)?' => 'PonderQuestionEditController',
         'question/preview/' => 'PonderQuestionPreviewController',

src/applications/ponder/controller/PonderAnswerEditController.php

@@ -0,0 +1,108 @@
+<?php
+
+final class PonderAnswerEditController extends PonderController {
+
+  private $id;
+
+  public function willProcessRequest(array $data) {
+    $this->id = $data['id'];
+  }
+
+  public function processRequest() {
+    $request = $this->getRequest();
+    $viewer = $request->getUser();
+
+    $answer = id(new PonderAnswerQuery())
+      ->setViewer($viewer)
+      ->withIDs(array($this->id))
+      ->requireCapabilities(
+        array(
+          PhabricatorPolicyCapability::CAN_VIEW,
+          PhabricatorPolicyCapability::CAN_EDIT,
+        ))
+      ->executeOne();
+    if (!$answer) {
+      return new Aphront404Response();
+    }
+
+    $v_content = $answer->getContent();
+    $e_content = true;
+
+
+    $question = $answer->getQuestion();
+    $qid = $question->getID();
+    $aid = $answer->getID();
+
+    $question_uri = "/Q{$qid}#A{$aid}";
+
+    $errors = array();
+    if ($request->isFormPost()) {
+      $v_content = $request->getStr('content');
+
+      if (!strlen($v_content)) {
+        $errors[] = pht('You must provide some substance in your answer.');
+        $e_content = pht('Required');
+      }
+
+      if (!$errors) {
+        $xactions = array();
+        $xactions[] = id(new PonderAnswerTransaction())
+          ->setTransactionType(PonderAnswerTransaction::TYPE_CONTENT)
+          ->setNewValue($v_content);
+
+        $editor = id(new PonderAnswerEditor())
+          ->setActor($viewer)
+          ->setContentSourceFromRequest($request)
+          ->setContinueOnNoEffect(true);
+
+        $editor->applyTransactions($answer, $xactions);
+
+        return id(new AphrontRedirectResponse())
+          ->setURI($question_uri);
+      }
+    }
+
+    if ($errors) {
+      $errors = id(new AphrontErrorView())->setErrors($errors);
+    }
+
+    $form = id(new AphrontFormView())
+      ->setUser($viewer)
+      ->appendChild(
+        id(new AphrontFormStaticControl())
+          ->setLabel(pht('Question'))
+          ->setValue($question->getTitle()))
+      ->appendChild(
+        id(new PhabricatorRemarkupControl())
+          ->setLabel(pht('Answer'))
+          ->setName('content')
+          ->setValue($v_content)
+          ->setError($e_content))
+      ->appendChild(
+        id(new AphrontFormSubmitControl())
+          ->setValue(pht('Update Answer'))
+          ->addCancelButton($question_uri));
+
+    $crumbs = $this->buildApplicationCrumbs();
+    $crumbs->addCrumb(
+      id(new PhabricatorCrumbView())
+        ->setName("Q{$qid}")
+        ->setHref($question_uri));
+    $crumbs->addCrumb(
+      id(new PhabricatorCrumbView())
+        ->setName(pht('Edit Answer')));
+
+    return $this->buildApplicationPage(
+      array(
+        $crumbs,
+        $errors,
+        $form,
+      ),
+      array(
+        'title' => pht('Edit Answer'),
+        'dust' => true,
+        'device' => true,
+      ));
+
+  }
+}

src/applications/ponder/controller/PonderQuestionViewController.php

@@ -237,6 +237,8 @@ final class PonderQuestionViewController extends PonderController {
     $request = $this->getRequest();
     $viewer = $request->getUser();
 
+    $id = $answer->getID();
+
     $can_edit = PhabricatorPolicyFilter::hasCapability(
       $viewer,
       $answer,
@@ -247,10 +249,6 @@ final class PonderQuestionViewController extends PonderController {
       ->setObject($answer)
       ->setObjectURI($request->getRequestURI());
 
-/*
-
-    TODO
-
     $view->addAction(
       id(new PhabricatorActionView())
         ->setIcon('edit')
@@ -259,8 +257,6 @@ final class PonderQuestionViewController extends PonderController {
         ->setDisabled(!$can_edit)
         ->setWorkflow(!$can_edit));
 
-*/
-
     return $view;
   }
 

src/applications/ponder/editor/PonderAnswerEditor.php

@@ -1,99 +1,66 @@
 <?php
 
-final class PonderAnswerEditor extends PhabricatorEditor {
+final class PonderAnswerEditor
+  extends PhabricatorApplicationTransactionEditor {
 
-  private $question;
-  private $answer;
-  private $shouldEmail = true;
+  public function getTransactionTypes() {
+    $types = parent::getTransactionTypes();
 
-  public function setQuestion($question) {
-    $this->question = $question;
-    return $this;
+    $types[] = PhabricatorTransactions::TYPE_COMMENT;
+    $types[] = PonderAnswerTransaction::TYPE_CONTENT;
+
+    return $types;
   }
 
-  public function setAnswer($answer) {
-    $this->answer = $answer;
-    return $this;
-  }
+  protected function getCustomTransactionOldValue(
+    PhabricatorLiskDAO $object,
+    PhabricatorApplicationTransaction $xaction) {
 
-  public function saveAnswer() {
-    $actor = $this->requireActor();
-    if (!$this->question) {
-      throw new Exception("Must set question before saving answer");
-    }
-    if (!$this->answer) {
-      throw new Exception("Must set answer before saving it");
-    }
-
-    $question = $this->question;
-    $answer = $this->answer;
-    $conn = $answer->establishConnection('w');
-    $trans = $conn->openTransaction();
-    $trans->beginReadLocking();
-
-      $question->reload();
-
-      queryfx($conn,
-        'UPDATE %T as t
-        SET t.`answerCount` = t.`answerCount` + 1
-        WHERE t.`PHID` = %s',
-        $question->getTableName(),
-        $question->getPHID());
-
-      $answer->setQuestionID($question->getID());
-      $answer->save();
-
-    $trans->endReadLocking();
-    $trans->saveTransaction();
-
-    $question->attachRelated();
-    id(new PhabricatorSearchIndexer())
-      ->indexDocumentByPHID($question->getPHID());
-
-    // subscribe author and @mentions
-    $subeditor = id(new PhabricatorSubscriptionsEditor())
-      ->setObject($question)
-      ->setActor($actor);
-
-    $subeditor->subscribeExplicit(array($answer->getAuthorPHID()));
-
-    $content = $answer->getContent();
-    $at_mention_phids = PhabricatorMarkupEngine::extractPHIDsFromMentions(
-      array($content));
-    $subeditor->subscribeImplicit($at_mention_phids);
-    $subeditor->save();
-
-    if ($this->shouldEmail) {
-      // now load subscribers, including implicitly-added @mention victims
-      $subscribers = PhabricatorSubscribersQuery
-        ::loadSubscribersForPHID($question->getPHID());
-
-
-      // @mention emails (but not for anyone who has explicitly unsubscribed)
-      if (array_intersect($at_mention_phids, $subscribers)) {
-        id(new PonderMentionMail(
-          $question,
-          $answer,
-          $actor))
-          ->setToPHIDs($at_mention_phids)
-          ->send();
-      }
-
-      $other_subs =
-        array_diff(
-          $subscribers,
-          $at_mention_phids);
-
-      // 'Answered' emails for subscribers who are not @mentiond (and excluding
-      // author depending on their MetaMTA settings).
-      if ($other_subs) {
-        id(new PonderAnsweredMail(
-          $question,
-          $answer,
-          $actor))
-          ->setToPHIDs($other_subs)
-          ->send();
-      }
+    switch ($xaction->getTransactionType()) {
+      case PonderAnswerTransaction::TYPE_CONTENT:
+        return $object->getContent();
     }
   }
+
+  protected function getCustomTransactionNewValue(
+    PhabricatorLiskDAO $object,
+    PhabricatorApplicationTransaction $xaction) {
+
+    switch ($xaction->getTransactionType()) {
+      case PonderAnswerTransaction::TYPE_CONTENT:
+        return $xaction->getNewValue();
+    }
+  }
+
+  protected function applyCustomInternalTransaction(
+    PhabricatorLiskDAO $object,
+    PhabricatorApplicationTransaction $xaction) {
+
+    switch ($xaction->getTransactionType()) {
+      case PonderAnswerTransaction::TYPE_CONTENT:
+        $object->setContent($xaction->getNewValue());
+        break;
+    }
+  }
+
+  protected function applyCustomExternalTransaction(
+    PhabricatorLiskDAO $object,
+    PhabricatorApplicationTransaction $xaction) {
+    return;
+  }
+
+  protected function mergeTransactions(
+    PhabricatorApplicationTransaction $u,
+    PhabricatorApplicationTransaction $v) {
+
+    $type = $u->getTransactionType();
+    switch ($type) {
+      case PonderAnswerTransaction::TYPE_CONTENT:
+        return $v;
+    }
+
+    return parent::mergeTransactions($u, $v);
+  }
+
+
 }

src/applications/ponder/storage/PonderAnswer.php

@@ -4,7 +4,9 @@ final class PonderAnswer extends PonderDAO
   implements
     PhabricatorMarkupInterface,
     PonderVotableInterface,
-    PhabricatorPolicyInterface {
+    PhabricatorPolicyInterface,
+    PhabricatorSubscribableInterface,
+    PhabricatorTokenReceiverInterface {
 
   const MARKUP_FIELD_CONTENT = 'markup:content';
 
@@ -145,4 +147,23 @@ final class PonderAnswer extends PonderDAO
     }
   }
 
+
+/* -(  PhabricatorTokenReceiverInterface  )---------------------------------- */
+
+
+  public function getUsersToNotifyOfTokenGiven() {
+    return array(
+      $this->getAuthorPHID(),
+    );
+  }
+
+
+/* -(  PhabricatorSubscribableInterface  )----------------------------------- */
+
+
+  public function isAutomaticallySubscribed($phid) {
+    return ($phid == $this->getAuthorPHID());
+  }
+
+
 }

src/applications/ponder/storage/PonderAnswerTransaction.php

@@ -3,6 +3,8 @@
 final class PonderAnswerTransaction
   extends PhabricatorApplicationTransaction {
 
+  const TYPE_CONTENT = 'ponder.answer:content';
+
   public function getApplicationName() {
     return 'ponder';
   }

src/applications/ponder/storage/PonderQuestion.php

@@ -165,7 +165,7 @@ final class PonderQuestion extends PonderDAO
   }
 
   public function isAutomaticallySubscribed($phid) {
-    return false;
+    return ($phid == $this->getAuthorPHID());
   }
 
   public function save() {
@@ -198,8 +198,10 @@ final class PonderQuestion extends PonderDAO
     return ($viewer->getPHID() == $this->getAuthorPHID());
   }
 
+
 /* -(  PhabricatorTokenReceiverInterface  )---------------------------------- */
 
+
   public function getUsersToNotifyOfTokenGiven() {
     return array(
       $this->getAuthorPHID(),