Add import log messages to Calendar imports

Summary: Ref T10747. When stuff goes wrong (or right) let the user know what happened.

Test Plan: {F1870139}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10747

Differential Revision: https://secure.phabricator.com/D16704

resources/sql/autopatches/20161013.cal.01.importlog.sql

@@ -0,0 +1,8 @@
+CREATE TABLE {$NAMESPACE}_calendar.calendar_importlog (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  importPHID VARBINARY(64) NOT NULL,
+  parameters LONGTEXT NOT NULL COLLATE {$COLLATE_TEXT},
+  dateCreated INT UNSIGNED NOT NULL,
+  dateModified INT UNSIGNED NOT NULL,
+  KEY `key_import` (`importPHID`)
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};

src/__phutil_library_map__.php

@@ -2104,21 +2104,31 @@ phutil_register_library_map(array(
     'PhabricatorCalendarICSWriter' => 'applications/calendar/util/PhabricatorCalendarICSWriter.php',
     'PhabricatorCalendarIconSet' => 'applications/calendar/icon/PhabricatorCalendarIconSet.php',
     'PhabricatorCalendarImport' => 'applications/calendar/storage/PhabricatorCalendarImport.php',
+    'PhabricatorCalendarImportDefaultLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportDefaultLogType.php',
     'PhabricatorCalendarImportDisableController' => 'applications/calendar/controller/PhabricatorCalendarImportDisableController.php',
     'PhabricatorCalendarImportDisableTransaction' => 'applications/calendar/xaction/PhabricatorCalendarImportDisableTransaction.php',
+    'PhabricatorCalendarImportDuplicateLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportDuplicateLogType.php',
     'PhabricatorCalendarImportEditController' => 'applications/calendar/controller/PhabricatorCalendarImportEditController.php',
     'PhabricatorCalendarImportEditEngine' => 'applications/calendar/editor/PhabricatorCalendarImportEditEngine.php',
     'PhabricatorCalendarImportEditor' => 'applications/calendar/editor/PhabricatorCalendarImportEditor.php',
+    'PhabricatorCalendarImportEmptyLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportEmptyLogType.php',
     'PhabricatorCalendarImportEngine' => 'applications/calendar/import/PhabricatorCalendarImportEngine.php',
     'PhabricatorCalendarImportICSFileTransaction' => 'applications/calendar/xaction/PhabricatorCalendarImportICSFileTransaction.php',
+    'PhabricatorCalendarImportIgnoredNodeLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportIgnoredNodeLogType.php',
     'PhabricatorCalendarImportListController' => 'applications/calendar/controller/PhabricatorCalendarImportListController.php',
+    'PhabricatorCalendarImportLog' => 'applications/calendar/storage/PhabricatorCalendarImportLog.php',
+    'PhabricatorCalendarImportLogQuery' => 'applications/calendar/query/PhabricatorCalendarImportLogQuery.php',
+    'PhabricatorCalendarImportLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportLogType.php',
     'PhabricatorCalendarImportNameTransaction' => 'applications/calendar/xaction/PhabricatorCalendarImportNameTransaction.php',
+    'PhabricatorCalendarImportOriginalLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportOriginalLogType.php',
+    'PhabricatorCalendarImportOrphanLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportOrphanLogType.php',
     'PhabricatorCalendarImportPHIDType' => 'applications/calendar/phid/PhabricatorCalendarImportPHIDType.php',
     'PhabricatorCalendarImportQuery' => 'applications/calendar/query/PhabricatorCalendarImportQuery.php',
     'PhabricatorCalendarImportSearchEngine' => 'applications/calendar/query/PhabricatorCalendarImportSearchEngine.php',
     'PhabricatorCalendarImportTransaction' => 'applications/calendar/storage/PhabricatorCalendarImportTransaction.php',
     'PhabricatorCalendarImportTransactionQuery' => 'applications/calendar/query/PhabricatorCalendarImportTransactionQuery.php',
     'PhabricatorCalendarImportTransactionType' => 'applications/calendar/xaction/PhabricatorCalendarImportTransactionType.php',
+    'PhabricatorCalendarImportUpdateLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportUpdateLogType.php',
     'PhabricatorCalendarImportViewController' => 'applications/calendar/controller/PhabricatorCalendarImportViewController.php',
     'PhabricatorCalendarRemarkupRule' => 'applications/calendar/remarkup/PhabricatorCalendarRemarkupRule.php',
     'PhabricatorCalendarReplyHandler' => 'applications/calendar/mail/PhabricatorCalendarReplyHandler.php',
@@ -6921,21 +6931,35 @@ phutil_register_library_map(array(
       'PhabricatorApplicationTransactionInterface',
       'PhabricatorDestructibleInterface',
     ),
+    'PhabricatorCalendarImportDefaultLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportDisableController' => 'PhabricatorCalendarController',
     'PhabricatorCalendarImportDisableTransaction' => 'PhabricatorCalendarImportTransactionType',
+    'PhabricatorCalendarImportDuplicateLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportEditController' => 'PhabricatorCalendarController',
     'PhabricatorCalendarImportEditEngine' => 'PhabricatorEditEngine',
     'PhabricatorCalendarImportEditor' => 'PhabricatorApplicationTransactionEditor',
+    'PhabricatorCalendarImportEmptyLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportEngine' => 'Phobject',
     'PhabricatorCalendarImportICSFileTransaction' => 'PhabricatorCalendarImportTransactionType',
+    'PhabricatorCalendarImportIgnoredNodeLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportListController' => 'PhabricatorCalendarController',
+    'PhabricatorCalendarImportLog' => array(
+      'PhabricatorCalendarDAO',
+      'PhabricatorPolicyInterface',
+      'PhabricatorDestructibleInterface',
+    ),
+    'PhabricatorCalendarImportLogQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
+    'PhabricatorCalendarImportLogType' => 'Phobject',
     'PhabricatorCalendarImportNameTransaction' => 'PhabricatorCalendarImportTransactionType',
+    'PhabricatorCalendarImportOriginalLogType' => 'PhabricatorCalendarImportLogType',
+    'PhabricatorCalendarImportOrphanLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportPHIDType' => 'PhabricatorPHIDType',
     'PhabricatorCalendarImportQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'PhabricatorCalendarImportSearchEngine' => 'PhabricatorApplicationSearchEngine',
     'PhabricatorCalendarImportTransaction' => 'PhabricatorModularTransaction',
     'PhabricatorCalendarImportTransactionQuery' => 'PhabricatorApplicationTransactionQuery',
     'PhabricatorCalendarImportTransactionType' => 'PhabricatorModularTransactionType',
+    'PhabricatorCalendarImportUpdateLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportViewController' => 'PhabricatorCalendarController',
     'PhabricatorCalendarRemarkupRule' => 'PhabricatorObjectRemarkupRule',
     'PhabricatorCalendarReplyHandler' => 'PhabricatorApplicationTransactionReplyHandler',

src/applications/calendar/controller/PhabricatorCalendarImportViewController.php

@@ -30,12 +30,14 @@ final class PhabricatorCalendarImportViewController
     $curtain = $this->buildCurtain($import);
     $details = $this->buildPropertySection($import);
 
+    $log_messages = $this->buildLogMessages($import);
     $imported_events = $this->buildImportedEvents($import);
 
     $view = id(new PHUITwoColumnView())
       ->setHeader($header)
       ->setMainColumn(
         array(
+          $log_messages,
           $imported_events,
           $timeline,
         ))
@@ -134,8 +136,70 @@ final class PhabricatorCalendarImportViewController
     return $properties;
   }
 
-  private function buildImportedEvents(
-    PhabricatorCalendarImport $import) {
+  private function buildLogMessages(PhabricatorCalendarImport $import) {
+    $viewer = $this->getViewer();
+
+    $logs = id(new PhabricatorCalendarImportLogQuery())
+      ->setViewer($viewer)
+      ->withImportPHIDs(array($import->getPHID()))
+      ->setLimit(25)
+      ->execute();
+
+    $rows = array();
+    foreach ($logs as $log) {
+      $icon = $log->getDisplayIcon($viewer);
+      $color = $log->getDisplayColor($viewer);
+      $name = $log->getDisplayType($viewer);
+      $description = $log->getDisplayDescription($viewer);
+
+      $rows[] = array(
+        $log->getID(),
+        id(new PHUIIconView())->setIcon($icon, $color),
+        $name,
+        $description,
+        phabricator_datetime($log->getDateCreated(), $viewer),
+      );
+    }
+
+    $table = id(new AphrontTableView($rows))
+      ->setHeaders(
+        array(
+          pht('ID'),
+          null,
+          pht('Type'),
+          pht('Mesage'),
+          pht('Date'),
+        ))
+      ->setColumnClasses(
+        array(
+          null,
+          null,
+          'pri',
+          'wide',
+          null,
+        ));
+
+    $all_uri = $this->getApplicationURI('import/log/');
+    $all_uri = (string)id(new PhutilURI($all_uri))
+      ->setQueryParam('importSourcePHID', $import->getPHID());
+
+    $all_button = id(new PHUIButtonView())
+      ->setTag('a')
+      ->setText(pht('View All'))
+      ->setIcon('fa-search')
+      ->setHref($all_uri);
+
+    $header = id(new PHUIHeaderView())
+      ->setHeader(pht('Log Messages'))
+      ->addActionLink($all_button);
+
+    return id(new PHUIObjectBoxView())
+      ->setHeader($header)
+      ->setBackground(PHUIObjectBoxView::BLUE_PROPERTY)
+      ->setTable($table);
+  }
+
+  private function buildImportedEvents(PhabricatorCalendarImport $import) {
     $viewer = $this->getViewer();
 
     $engine = id(new PhabricatorCalendarEventSearchEngine())

src/applications/calendar/import/PhabricatorCalendarImportEngine.php

@@ -49,8 +49,13 @@ abstract class PhabricatorCalendarImportEngine
     $nodes = array();
     foreach ($root->getChildren() as $document) {
       foreach ($document->getChildren() as $node) {
-        if ($node->getNodeType() != $event_type) {
-          // TODO: Warn that we ignored this.
+        $node_type = $node->getNodeType();
+        if ($node_type != $event_type) {
+          $import->newLogMessage(
+            PhabricatorCalendarImportIgnoredNodeLogType::LOGTYPE,
+            array(
+              'node.type' => $node_type,
+            ));
           continue;
         }
 
@@ -59,16 +64,62 @@ abstract class PhabricatorCalendarImportEngine
     }
 
     $node_map = array();
-    $parent_uids = array();
     foreach ($nodes as $node) {
       $full_uid = $this->getFullNodeUID($node);
       if (isset($node_map[$full_uid])) {
-        // TODO: Warn that we got a duplicate.
+        $import->newLogMessage(
+          PhabricatorCalendarImportDuplicateLogType::LOGTYPE,
+          array(
+            'uid.full' => $full_uid,
+          ));
         continue;
       }
       $node_map[$full_uid] = $node;
     }
 
+    // If we already know about some of these events and they were created
+    // here, we're not going to import it again. This can happen if a user
+    // exports an event and then tries to import it again. This is probably
+    // not what they meant to do and this pathway generally leads to madness.
+    $likely_phids = array();
+    foreach ($node_map as $full_uid => $node) {
+      $uid = $node->getUID();
+      $matches = null;
+      if (preg_match('/^(PHID-.*)@(.*)\z/', $uid, $matches)) {
+        $likely_phids[$full_uid] = $matches[1];
+      }
+    }
+
+    if ($likely_phids) {
+      // NOTE: We're using the omnipotent viewer here because we don't want
+      // to collide with events that already exist, even if you can't see
+      // them.
+      $events = id(new PhabricatorCalendarEventQuery())
+        ->setViewer(PhabricatorUser::getOmnipotentUser())
+        ->withPHIDs($likely_phids)
+        ->execute();
+      $events = mpull($events, null, 'getPHID');
+      foreach ($node_map as $full_uid => $node) {
+        $phid = idx($likely_phids, $full_uid);
+        if (!$phid) {
+          continue;
+        }
+
+        $event = idx($events, $phid);
+        if (!$event) {
+          continue;
+        }
+
+        $import->newLogMessage(
+          PhabricatorCalendarImportOriginalLogType::LOGTYPE,
+          array(
+            'phid' => $event->getPHID(),
+          ));
+
+        unset($node_map[$full_uid]);
+      }
+    }
+
     if ($node_map) {
       $events = id(new PhabricatorCalendarEventQuery())
         ->setViewer($viewer)
@@ -114,7 +165,12 @@ abstract class PhabricatorCalendarImportEngine
         // does not exist or we're going to delete it anyway. We just drop
         // this node.
 
-        // TODO: Warn that we got rid of an event with no parent.
+        $import->newLogMessage(
+          PhabricatorCalendarImportOrphanLogType::LOGTYPE,
+          array(
+            'uid.full' => $full_uid,
+            'uid.parent' => $parent_uid,
+          ));
 
         continue;
       }
@@ -130,6 +186,10 @@ abstract class PhabricatorCalendarImportEngine
     $content_source = PhabricatorContentSource::newForSource(
       PhabricatorWebContentSource::SOURCECONST);
 
+    // NOTE: We're using the omnipotent user here because imported events are
+    // otherwise immutable.
+    $edit_actor = PhabricatorUser::getOmnipotentUser();
+
     $update_map = array_select_keys($update_map, $insert_order);
     foreach ($update_map as $full_uid => $event) {
       $parent_uid = $this->getParentNodeUID($node_map[$full_uid]);
@@ -144,13 +204,28 @@ abstract class PhabricatorCalendarImportEngine
       $event_xactions = $xactions[$full_uid];
 
       $editor = id(new PhabricatorCalendarEventEditor())
-        ->setActor($viewer)
+        ->setActor($edit_actor)
         ->setActingAsPHID($import->getPHID())
         ->setContentSource($content_source)
         ->setContinueOnNoEffect(true)
         ->setContinueOnMissingFields(true);
 
+      $is_new = !$event->getID();
+
       $editor->applyTransactions($event, $event_xactions);
+
+      $import->newLogMessage(
+        PhabricatorCalendarImportUpdateLogType::LOGTYPE,
+        array(
+          'new' => $is_new,
+          'phid' => $event->getPHID(),
+        ));
+    }
+
+    if (!$update_map) {
+      $import->newLogMessage(
+        PhabricatorCalendarImportEmptyLogType::LOGTYPE,
+        array());
     }
 
     // TODO: When the source is a subscription-based ICS file or some other

src/applications/calendar/importlog/PhabricatorCalendarImportDefaultLogType.php

@@ -0,0 +1,20 @@
+<?php
+
+final class PhabricatorCalendarImportDefaultLogType
+  extends PhabricatorCalendarImportLogType {
+
+  const LOGTYPE = 'default';
+
+  public function getDisplayType(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+
+    $type = $log->getParameter('type');
+    if (strlen($type)) {
+      return pht('Unknown Message "%s"', $type);
+    } else {
+      return pht('Unknown Message');
+    }
+  }
+
+}

src/applications/calendar/importlog/PhabricatorCalendarImportDuplicateLogType.php

@@ -0,0 +1,23 @@
+<?php
+
+final class PhabricatorCalendarImportDuplicateLogType
+  extends PhabricatorCalendarImportLogType {
+
+  const LOGTYPE = 'duplicate';
+
+  public function getDisplayType(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return pht('Duplicate Event');
+  }
+
+  public function getDisplayDescription(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    $duplicate_uid = $log->getParameter('uid.full');
+    return pht(
+      'Ignored duplicate event "%s" present in source.',
+      $duplicate_uid);
+  }
+
+}

src/applications/calendar/importlog/PhabricatorCalendarImportEmptyLogType.php

@@ -0,0 +1,32 @@
+<?php
+
+final class PhabricatorCalendarImportEmptyLogType
+  extends PhabricatorCalendarImportLogType {
+
+  const LOGTYPE = 'empty';
+
+  public function getDisplayType(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return pht('No Events Imported');
+  }
+
+  public function getDisplayDescription(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return pht('Found no valid events to import.');
+  }
+
+  public function getDisplayIcon(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return 'fa-ban';
+  }
+
+  public function getDisplayColor(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return 'red';
+  }
+
+}

src/applications/calendar/importlog/PhabricatorCalendarImportIgnoredNodeLogType.php

@@ -0,0 +1,23 @@
+<?php
+
+final class PhabricatorCalendarImportIgnoredNodeLogType
+  extends PhabricatorCalendarImportLogType {
+
+  const LOGTYPE = 'nodetype';
+
+  public function getDisplayType(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return pht('Ignored Node');
+  }
+
+  public function getDisplayDescription(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    $node_type = $log->getParameter('node.type');
+    return pht(
+      'Ignored unsupported "%s" node present in source.',
+      $node_type);
+  }
+
+}

src/applications/calendar/importlog/PhabricatorCalendarImportLogType.php

@@ -0,0 +1,39 @@
+<?php
+
+abstract class PhabricatorCalendarImportLogType
+  extends Phobject {
+
+  final public function getLogTypeConstant() {
+    return $this->getPhobjectClassConstant('LOGTYPE', 64);
+  }
+
+  final public static function getAllLogTypes() {
+    return id(new PhutilClassMapQuery())
+      ->setAncestorClass(__CLASS__)
+      ->setUniqueMethod('getLogTypeConstant')
+      ->execute();
+  }
+
+  abstract public function getDisplayType(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log);
+
+  public function getDisplayIcon(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return 'fa-warning';
+  }
+
+  public function getDisplayColor(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return 'yellow';
+  }
+
+  public function getDisplayDescription(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return null;
+  }
+
+}

src/applications/calendar/importlog/PhabricatorCalendarImportOriginalLogType.php

@@ -0,0 +1,26 @@
+<?php
+
+final class PhabricatorCalendarImportOriginalLogType
+  extends PhabricatorCalendarImportLogType {
+
+  const LOGTYPE = 'original';
+
+  public function getDisplayType(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return pht('Original Event');
+  }
+
+  public function getDisplayDescription(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+
+    $phid = $log->getParameter('phid');
+
+    return pht(
+      'Ignored an event (%s) because the original version of this event '.
+      'was created here.',
+      $viewer->renderHandle($phid));
+  }
+
+}

src/applications/calendar/importlog/PhabricatorCalendarImportOrphanLogType.php

@@ -0,0 +1,25 @@
+<?php
+
+final class PhabricatorCalendarImportOrphanLogType
+  extends PhabricatorCalendarImportLogType {
+
+  const LOGTYPE = 'orphan';
+
+  public function getDisplayType(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return pht('Orphan');
+  }
+
+  public function getDisplayDescription(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    $child_uid = $log->getParameter('uid.full');
+    $parent_uid = $log->getParameter('uid.parent');
+    return pht(
+      'Found orphaned child event ("%s") without a parent event ("%s").',
+      $child_uid,
+      $parent_uid);
+  }
+
+}

src/applications/calendar/importlog/PhabricatorCalendarImportUpdateLogType.php

@@ -0,0 +1,38 @@
+<?php
+
+final class PhabricatorCalendarImportUpdateLogType
+  extends PhabricatorCalendarImportLogType {
+
+  const LOGTYPE = 'update';
+
+  public function getDisplayType(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    $is_new = $log->getParameter('new');
+    if ($is_new) {
+      return pht('Imported Event');
+    } else {
+      return pht('Updated Event');
+    }
+  }
+
+  public function getDisplayDescription(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    $event_phid = $log->getParameter('phid');
+    return $viewer->renderHandle($event_phid);
+  }
+
+  public function getDisplayIcon(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return 'fa-upload';
+  }
+
+  public function getDisplayColor(
+    PhabricatorUser $viewer,
+    PhabricatorCalendarImportLog $log) {
+    return 'green';
+  }
+
+}

src/applications/calendar/query/PhabricatorCalendarImportLogQuery.php

@@ -0,0 +1,111 @@
+<?php
+
+final class PhabricatorCalendarImportLogQuery
+  extends PhabricatorCursorPagedPolicyAwareQuery {
+
+  private $ids;
+  private $phids;
+  private $importPHIDs;
+
+  public function withIDs(array $ids) {
+    $this->ids = $ids;
+    return $this;
+  }
+
+  public function withPHIDs(array $phids) {
+    $this->phids = $phids;
+    return $this;
+  }
+
+  public function withImportPHIDs(array $phids) {
+    $this->importPHIDs = $phids;
+    return $this;
+  }
+
+  public function newResultObject() {
+    return new PhabricatorCalendarImportLog();
+  }
+
+  protected function loadPage() {
+    return $this->loadStandardPage($this->newResultObject());
+  }
+
+  protected function buildWhereClauseParts(AphrontDatabaseConnection $conn) {
+    $where = parent::buildWhereClauseParts($conn);
+
+    if ($this->ids !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'log.id IN (%Ld)',
+        $this->ids);
+    }
+
+    if ($this->phids !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'log.phid IN (%Ls)',
+        $this->phids);
+    }
+
+    if ($this->importPHIDs !== null) {
+      $where[] = qsprintf(
+        $conn,
+        'log.importPHID IN (%Ls)',
+        $this->importPHIDs);
+    }
+
+
+    return $where;
+  }
+
+  protected function willFilterPage(array $page) {
+    $viewer = $this->getViewer();
+
+    $type_map = PhabricatorCalendarImportLogType::getAllLogTypes();
+    foreach ($page as $log) {
+      $type_constant = $log->getParameter('type');
+
+      $type_object = idx($type_map, $type_constant);
+      if (!$type_object) {
+        $type_object = new PhabricatorCalendarImportDefaultLogType();
+      }
+
+      $type_object = clone $type_object;
+      $log->attachLogType($type_object);
+    }
+
+    $import_phids = mpull($page, 'getImportPHID');
+
+    if ($import_phids) {
+      $imports = id(new PhabricatorCalendarImportQuery())
+        ->setViewer($viewer)
+        ->withPHIDs($import_phids)
+        ->execute();
+      $imports = mpull($imports, null, 'getPHID');
+    } else {
+      $imports = array();
+    }
+
+    foreach ($page as $key => $log) {
+      $import = idx($imports, $log->getImportPHID());
+      if (!$import) {
+        $this->didRejectResult($import);
+        unset($page[$key]);
+        continue;
+      }
+
+      $log->attachImport($import);
+    }
+
+    return $page;
+  }
+
+  protected function getPrimaryTableAlias() {
+    return 'log';
+  }
+
+  public function getQueryApplicationClass() {
+    return 'PhabricatorCalendarApplication';
+  }
+
+}

src/applications/calendar/storage/PhabricatorCalendarEvent.php

@@ -907,6 +907,10 @@ final class PhabricatorCalendarEvent extends PhabricatorCalendarDAO
     return $set;
   }
 
+  public function isImportedEvent() {
+    return (bool)$this->getImportSourcePHID();
+  }
+
   public function getImportSource() {
     return $this->assertAttached($this->importSource);
   }

src/applications/calendar/storage/PhabricatorCalendarImport.php

@@ -133,6 +133,17 @@ final class PhabricatorCalendarImport
     return $timeline;
   }
 
+  public function newLogMessage($type, array $parameters) {
+    $parameters = array(
+      'type' => $type,
+    ) + $parameters;
+
+    return id(new PhabricatorCalendarImportLog())
+      ->setImportPHID($this->getPHID())
+      ->setParameters($parameters)
+      ->save();
+  }
+
 
 /* -(  PhabricatorDestructibleInterface  )----------------------------------- */
 
@@ -144,12 +155,21 @@ final class PhabricatorCalendarImport
     $this->openTransaction();
 
       $events = id(new PhabricatorCalendarEventQuery())
+        ->setViewer($viewer)
         ->withImportSourcePHIDs(array($this->getPHID()))
         ->execute();
       foreach ($events as $event) {
         $engine->destroyObject($event);
       }
 
+      $logs = id(new PhabricatorCalendarImportLogQuery())
+        ->setViewer($viewer)
+        ->withImportPHIDs(array($this->getPHID()))
+        ->execute();
+      foreach ($logs as $log) {
+        $engine->destroyObject($log);
+      }
+
       $this->delete();
     $this->saveTransaction();
   }

src/applications/calendar/storage/PhabricatorCalendarImportLog.php

@@ -0,0 +1,103 @@
+<?php
+
+final class PhabricatorCalendarImportLog
+  extends PhabricatorCalendarDAO
+  implements
+    PhabricatorPolicyInterface,
+    PhabricatorDestructibleInterface {
+
+  protected $importPHID;
+  protected $parameters = array();
+
+  private $import = self::ATTACHABLE;
+  private $logType = self::ATTACHABLE;
+
+  protected function getConfiguration() {
+    return array(
+      self::CONFIG_SERIALIZATION => array(
+        'parameters' => self::SERIALIZATION_JSON,
+      ),
+      self::CONFIG_KEY_SCHEMA => array(
+        'key_import' => array(
+          'columns' => array('importPHID'),
+        ),
+      ),
+    ) + parent::getConfiguration();
+  }
+
+  public function getParameter($key, $default = null) {
+    return idx($this->parameters, $key, $default);
+  }
+
+  public function setParameter($key, $value) {
+    $this->parameters[$key] = $value;
+    return $this;
+  }
+
+  public function getImport() {
+    return $this->assertAttached($this->import);
+  }
+
+  public function attachImport(PhabricatorCalendarImport $import) {
+    $this->import = $import;
+    return $this;
+  }
+
+  public function getDisplayIcon(PhabricatorUser $viewer) {
+    return $this->getLogType()->getDisplayIcon($viewer, $this);
+  }
+
+  public function getDisplayColor(PhabricatorUser $viewer) {
+    return $this->getLogType()->getDisplayColor($viewer, $this);
+  }
+
+  public function getDisplayType(PhabricatorUser $viewer) {
+    return $this->getLogType()->getDisplayType($viewer, $this);
+  }
+
+  public function getDisplayDescription(PhabricatorUser $viewer) {
+    return $this->getLogType()->getDisplayDescription($viewer, $this);
+  }
+
+  public function getLogType() {
+    return $this->assertAttached($this->logType);
+  }
+
+  public function attachLogType(PhabricatorCalendarImportLogType $type) {
+    $this->logType = $type;
+    return $this;
+  }
+
+
+/* -(  PhabricatorPolicyInterface  )----------------------------------------- */
+
+
+  public function getCapabilities() {
+    return array(
+      PhabricatorPolicyCapability::CAN_VIEW,
+    );
+  }
+
+  public function getPolicy($capability) {
+    return PhabricatorPolicies::getMostOpenPolicy();
+  }
+
+  public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
+    return false;
+  }
+
+  public function describeAutomaticCapability($capability) {
+    return null;
+  }
+
+
+/* -(  PhabricatorDestructibleInterface  )----------------------------------- */
+
+
+  public function destroyObjectPermanently(
+    PhabricatorDestructionEngine $engine) {
+    $viewer = $engine->getViewer();
+    $this->delete();
+  }
+
+}