Migrate all Differential inline comments to ApplicationTransactions

Summary:
Ref T2222. This implements step (1) described there, which is moving over all the inline comments.

The old and new tables are simliar. The only real trick here is that `transactionPHID` and `legacyCommentID` mean roughly the same thing (`null` if the inline is a draft, non-null if it has been submitted) but we don't have real `transactionPHID`s yet. We just make some up -- we'll backfill them later.

Two risks here:

  - I need to take a second look at the keys on this table. I think we need to tweak them a bit, and it will be less disruptive to do that before this migration than after.
  - This will take a while for Facebook, and other large installs with tens of thousands of revisions. I'll communicate this.

I'm otherwise pretty satisfied with this, seems to work well and is pretty low risk / non-disruptive.

Test Plan:
  - Before migrating, then after migrating:
    - Made a bunch of inlines (drafts, submitted).
    - Edited and deleted inlines.
    - Verified inlines showed up in preview.
    - Verified that inlines aren't indexed when they're drafts (`bin/search index D935`).
    - Verified that inlines ARE indexed when they're not drafts.
    - Verified that drafts inlines make revisions appear as "with draft" in the revision list.
  - Made left, right, and draft inlines.
  - Migrated (`bin/storage upgrade`).
  - Verified that my inlines from before the migration still showed up.
  - (Repeated all the stuff above.)
  - Manually inspected the inline comment table.

Reviewers: btrahan

Reviewed By: btrahan

CC: FacebookPOC, aran

Maniphest Tasks: T2222

Differential Revision: https://secure.phabricator.com/D7139

resources/sql/patches/20130926.dinline.php

@@ -0,0 +1,90 @@
+<?php
+
+$revision_table = new DifferentialRevision();
+$conn_w = $revision_table->establishConnection('w');
+$conn_w->openTransaction();
+
+$src_table = 'differential_inlinecomment';
+$dst_table = 'differential_transaction_comment';
+
+echo "Migrating Differential inline comments to new format...\n";
+
+$content_source = PhabricatorContentSource::newForSource(
+  PhabricatorContentSource::SOURCE_LEGACY,
+  array())->serialize();
+
+$rows = new LiskRawMigrationIterator($conn_w, $src_table);
+foreach ($rows as $row) {
+  $id = $row['id'];
+
+  $revision_id = $row['revisionID'];
+
+  echo "Migrating inline #{$id} (D{$revision_id})...\n";
+
+  $revision_row = queryfx_one(
+    $conn_w,
+    'SELECT phid FROM %T WHERE id = %d',
+    $revision_table->getTableName(),
+    $revision_id);
+  if (!$revision_row) {
+    continue;
+  }
+
+  $revision_phid = $revision_row['phid'];
+
+  if ($row['commentID']) {
+    $xaction_phid = PhabricatorPHID::generateNewPHID(
+      PhabricatorApplicationTransactionPHIDTypeTransaction::TYPECONST,
+      DifferentialPHIDTypeRevision::TYPECONST);
+  } else {
+    $xaction_phid = null;
+  }
+
+  $comment_phid = PhabricatorPHID::generateNewPHID(
+    PhabricatorPHIDConstants::PHID_TYPE_XCMT,
+    DifferentialPHIDTypeRevision::TYPECONST);
+
+  queryfx(
+    $conn_w,
+    'INSERT IGNORE INTO %T
+      (id, phid, transactionPHID, authorPHID, viewPolicy, editPolicy,
+        commentVersion, content, contentSource, isDeleted,
+        dateCreated, dateModified, revisionPHID, changesetID,
+        isNewFile, lineNumber, lineLength, hasReplies, legacyCommentID)
+      VALUES (%d, %s, %ns, %s, %s, %s,
+        %d, %s, %s, %d,
+        %d, %d, %s, %nd,
+        %d, %d, %d, %d, %nd)',
+    $dst_table,
+
+    // id, phid, transactionPHID, authorPHID, viewPolicy, editPolicy
+    $row['id'],
+    $comment_phid,
+    $xaction_phid,
+    $row['authorPHID'],
+    'public',
+    $row['authorPHID'],
+
+    // commentVersion, content, contentSource, isDeleted
+    1,
+    $row['content'],
+    $content_source,
+    0,
+
+    // dateCreated, dateModified, revisionPHID, changesetID
+    $row['dateCreated'],
+    $row['dateModified'],
+    $revision_phid,
+    $row['changesetID'],
+
+    // isNewFile, lineNumber, lineLength, hasReplies, legacyCommentID
+    $row['isNewFile'],
+    $row['lineNumber'],
+    $row['lineLength'],
+    0,
+    $row['commentID']);
+
+}
+
+$conn_w->saveTransaction();
+echo "Done.\n";

src/applications/differential/controller/DifferentialInlineCommentEditController.php

@@ -30,7 +30,7 @@ final class DifferentialInlineCommentEditController
     }
 
     return id(new DifferentialInlineComment())
-      ->setRevisionID($revision_id)
+      ->setRevision($revision)
       ->setChangesetID($changeset_id);
   }
 

src/applications/differential/query/DifferentialInlineCommentQuery.php

@@ -51,7 +51,7 @@ final class DifferentialInlineCommentQuery
   }
 
   public function execute() {
-    $table = new DifferentialInlineComment();
+    $table = new DifferentialTransactionComment();
     $conn_r = $table->establishConnection('r');
 
     $data = queryfx_all(
@@ -61,7 +61,14 @@ final class DifferentialInlineCommentQuery
       $this->buildWhereClause($conn_r),
       $this->buildLimitClause($conn_r));
 
-    return $table->loadAllFromArray($data);
+    $comments = $table->loadAllFromArray($data);
+
+    foreach ($comments as $key => $value) {
+      $comments[$key] = DifferentialInlineComment::newFromModernComment(
+        $value);
+    }
+
+    return $comments;
   }
 
   public function executeOne() {
@@ -71,17 +78,35 @@ final class DifferentialInlineCommentQuery
   private function buildWhereClause(AphrontDatabaseConnection $conn_r) {
     $where = array();
 
-    if ($this->revisionIDs) {
+    // Only find inline comments.
     $where[] = qsprintf(
       $conn_r,
-        'revisionID IN (%Ld)',
+      'changesetID IS NOT NULL');
+
+    if ($this->revisionIDs) {
+
+      // Look up revision PHIDs.
+      $revision_phids = queryfx_all(
+        $conn_r,
+        'SELECT phid FROM %T WHERE id IN (%Ld)',
+        id(new DifferentialRevision())->getTableName(),
         $this->revisionIDs);
+
+      if (!$revision_phids) {
+        throw new PhabricatorEmptyQueryException();
+      }
+      $revision_phids = ipull($revision_phids, 'phid');
+
+      $where[] = qsprintf(
+        $conn_r,
+        'revisionPHID IN (%Ls)',
+        $revision_phids);
     }
 
     if ($this->notDraft) {
       $where[] = qsprintf(
         $conn_r,
-        'commentID IS NOT NULL');
+        'transactionPHID IS NOT NULL');
     }
 
     if ($this->ids) {
@@ -95,31 +120,45 @@ final class DifferentialInlineCommentQuery
       list($phid, $ids) = $this->viewerAndChangesetIDs;
       $where[] = qsprintf(
         $conn_r,
-        'changesetID IN (%Ld) AND (authorPHID = %s OR commentID IS NOT NULL)',
+        'changesetID IN (%Ld) AND
+          (authorPHID = %s OR transactionPHID IS NOT NULL)',
         $ids,
         $phid);
     }
 
     if ($this->draftComments) {
       list($phid, $rev_id) = $this->draftComments;
+
+      $rev_phid = queryfx_one(
+        $conn_r,
+        'SELECT phid FROM %T WHERE id = %d',
+        id(new DifferentialRevision())->getTableName(),
+        $rev_id);
+
+      if (!$rev_phid) {
+        throw new PhabricatorEmptyQueryException();
+      }
+
+      $rev_phid = $rev_phid['phid'];
+
       $where[] = qsprintf(
         $conn_r,
-        'authorPHID = %s AND revisionID = %d AND commentID IS NULL',
+        'authorPHID = %s AND revisionPHID = %s AND transactionPHID IS NULL',
         $phid,
-        $rev_id);
+        $rev_phid);
     }
 
     if ($this->draftsByAuthors) {
       $where[] = qsprintf(
         $conn_r,
-        'authorPHID IN (%Ls) AND commentID IS NULL',
+        'authorPHID IN (%Ls) AND transactionPHID IS NULL',
         $this->draftsByAuthors);
     }
 
     if ($this->commentIDs) {
       $where[] = qsprintf(
         $conn_r,
-        'commentID IN (%Ld)',
+        'legacyCommentID IN (%Ld)',
         $this->commentIDs);
     }
 

src/applications/differential/query/DifferentialRevisionQuery.php

@@ -491,6 +491,11 @@ final class DifferentialRevisionQuery
         $this->draftRevisions[] = substr($draft->getDraftKey(), $len);
       }
 
+      // TODO: Restore this after drafts are sorted out. It's now very
+      // expensive to get revision IDs.
+
+      /*
+
       $inlines = id(new DifferentialInlineCommentQuery())
         ->withDraftsByAuthors($this->draftAuthors)
         ->execute();
@@ -498,6 +503,8 @@ final class DifferentialRevisionQuery
         $this->draftRevisions[] = $inline->getRevisionID();
       }
 
+      */
+
       if (!$this->draftRevisions) {
         return array();
       }

src/applications/differential/storage/DifferentialInlineComment.php

@@ -1,22 +1,53 @@
 <?php
 
 final class DifferentialInlineComment
-  extends DifferentialDAO
   implements PhabricatorInlineCommentInterface {
 
-  protected $revisionID;
-  protected $changesetID;
-  protected $commentID;
-
-  protected $authorPHID;
-  protected $isNewFile;
-  protected $lineNumber;
-  protected $lineLength;
-  protected $content;
-  protected $cache;
-
+  private $proxy;
   private $syntheticAuthor;
 
+  public function __construct() {
+    $this->proxy = new DifferentialTransactionComment();
+  }
+
+  public function __clone() {
+    $this->proxy = clone $this->proxy;
+  }
+
+  public function save() {
+    $content_source = PhabricatorContentSource::newForSource(
+      PhabricatorContentSource::SOURCE_LEGACY,
+      array());
+
+    $this->proxy
+      ->setViewPolicy('public')
+      ->setEditPolicy($this->getAuthorPHID())
+      ->setContentSource($content_source)
+      ->setCommentVersion(1)
+      ->save();
+
+    return $this;
+  }
+
+  public function delete() {
+    $this->proxy->delete();
+
+    return $this;
+  }
+
+  public function getID() {
+    return $this->proxy->getID();
+  }
+
+  public static function newFromModernComment(
+    DifferentialTransactionComment $comment) {
+
+    $obj = new DifferentialInlineComment();
+    $obj->proxy = $comment;
+
+    return $obj;
+  }
+
   public function setSyntheticAuthor($synthetic_author) {
     $this->syntheticAuthor = $synthetic_author;
     return $this;
@@ -34,75 +65,112 @@ final class DifferentialInlineComment
   }
 
   public function setContent($content) {
-    $this->setCache(null);
-    $this->writeField('content', $content);
+    $this->proxy->setContent($content);
     return $this;
   }
 
   public function getContent() {
-    return $this->readField('content');
+    return $this->proxy->getContent();
   }
 
   public function isDraft() {
     return !$this->getCommentID();
   }
 
-  // NOTE: We need to provide implementations so we conform to the shared
-  // interface; these are all trivial and just explicit versions of the Lisk
-  // defaults.
-
   public function setChangesetID($id) {
-    $this->writeField('changesetID', $id);
+    $this->proxy->setChangesetID($id);
     return $this;
   }
 
   public function getChangesetID() {
-    return $this->readField('changesetID');
+    return $this->proxy->getChangesetID();
   }
 
   public function setIsNewFile($is_new) {
-    $this->writeField('isNewFile', $is_new);
+    $this->proxy->setIsNewFile($is_new);
     return $this;
   }
 
   public function getIsNewFile() {
-    return $this->readField('isNewFile');
+    return $this->proxy->getIsNewFile();
   }
 
   public function setLineNumber($number) {
-    $this->writeField('lineNumber', $number);
+    $this->proxy->setLineNumber($number);
     return $this;
   }
 
   public function getLineNumber() {
-    return $this->readField('lineNumber');
+    return $this->proxy->getLineNumber();
   }
 
   public function setLineLength($length) {
-    $this->writeField('lineLength', $length);
+    $this->proxy->setLineLength($length);
     return $this;
   }
 
   public function getLineLength() {
-    return $this->readField('lineLength');
+    return $this->proxy->getLineLength();
   }
 
   public function setCache($cache) {
-    $this->writeField('cache', $cache);
     return $this;
   }
 
   public function getCache() {
-    return $this->readField('cache');
+    return null;
   }
 
   public function setAuthorPHID($phid) {
-    $this->writeField('authorPHID', $phid);
+    $this->proxy->setAuthorPHID($phid);
     return $this;
   }
 
   public function getAuthorPHID() {
-    return $this->readField('authorPHID');
+    return $this->proxy->getAuthorPHID();
+  }
+
+  public function setRevision(DifferentialRevision $revision) {
+    $this->proxy->setRevisionPHID($revision->getPHID());
+    return $this;
+  }
+
+  // Although these are purely transitional, they're also *extra* dumb.
+
+  public function setRevisionID($revision_id) {
+    $revision = id(new DifferentialRevision())->load($revision_id);
+    return $this->setRevision($revision);
+  }
+
+  public function getRevisionID() {
+    $phid = $this->proxy->getRevisionPHID();
+    if (!$phid) {
+      return null;
+    }
+
+    $revision = id(new DifferentialRevision())->loadOneWhere(
+      'phid = %s',
+      $phid);
+    if (!$revision) {
+      return null;
+    }
+    return $revision->getID();
+  }
+
+  // When setting a comment ID, we also generate a phantom transaction PHID for
+  // the future transaction.
+
+  public function setCommentID($id) {
+    $this->proxy->setLegacyCommentID($id);
+    $this->proxy->setTransactionPHID(
+      PhabricatorPHID::generateNewPHID(
+        PhabricatorApplicationTransactionPHIDTypeTransaction::TYPECONST,
+        DifferentialPHIDTypeRevision::TYPECONST));
+    return $this;
+  }
+
+  public function getCommentID() {
+    return $this->proxy->getLegacyCommentID();
   }
 
 

src/applications/differential/storage/DifferentialTransactionComment.php

@@ -5,9 +5,9 @@ final class DifferentialTransactionComment
 
   protected $revisionPHID;
   protected $changesetID;
-  protected $isNewFile;
-  protected $lineNumber;
-  protected $lineLength;
+  protected $isNewFile = 0;
+  protected $lineNumber = 0;
+  protected $lineLength = 0;
   protected $fixedState;
   protected $hasReplies = 0;
   protected $replyToCommentPHID;

src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php

@@ -1680,6 +1680,10 @@ final class PhabricatorBuiltinPatchList extends PhabricatorSQLPatchList {
         'type' => 'sql',
         'name' => $this->getPatchPath('20130915.maniphestqdrop.sql'),
       ),
+      '20130926.dinline.php' => array(
+        'type' => 'php',
+        'name' => $this->getPatchPath('20130926.dinline.php'),
+      ),
     );
   }
 }