Various statistics about revisions at /differential/stats/revisions/

Summary:
Show some statistics, like number of revisions, number of
revisions per week, lines per revision, etc. for phrivolous amusement.

Test Plan:
 - Went to /differential/stats/revisions/
Numbers seem right
 - Clicked 'Accepted'
Again
 - Changed to another user with long history
Load time was not too long though delay noticeable
 - Clicked 'Requested changes to'
User was preserved, looks good

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D1643

src/__phutil_library_map__.php

@@ -258,6 +258,8 @@ phutil_register_library_map(array(
     'DifferentialRevisionListData' => 'applications/differential/data/revisionlist',
     'DifferentialRevisionListView' => 'applications/differential/view/revisionlist',
     'DifferentialRevisionQuery' => 'applications/differential/query/revision',
+    'DifferentialRevisionStatsController' => 'applications/differential/controller/revisionstats',
+    'DifferentialRevisionStatsView' => 'applications/differential/view/revisionstats',
     'DifferentialRevisionStatusFieldSpecification' => 'applications/differential/field/specification/revisionstatus',
     'DifferentialRevisionUpdateHistoryView' => 'applications/differential/view/revisionupdatehistory',
     'DifferentialRevisionViewController' => 'applications/differential/controller/revisionview',
@@ -1076,6 +1078,8 @@ phutil_register_library_map(array(
     'DifferentialRevisionIDFieldSpecification' => 'DifferentialFieldSpecification',
     'DifferentialRevisionListController' => 'DifferentialController',
     'DifferentialRevisionListView' => 'AphrontView',
+    'DifferentialRevisionStatsController' => 'DifferentialController',
+    'DifferentialRevisionStatsView' => 'AphrontView',
     'DifferentialRevisionStatusFieldSpecification' => 'DifferentialFieldSpecification',
     'DifferentialRevisionUpdateHistoryView' => 'AphrontView',
     'DifferentialRevisionViewController' => 'DifferentialController',

src/aphront/default/configuration/AphrontDefaultApplicationConfiguration.php

@@ -96,6 +96,7 @@ class AphrontDefaultApplicationConfiguration
       '/differential/' => array(
         '$' => 'DifferentialRevisionListController',
         'filter/(?P<filter>\w+)/$' => 'DifferentialRevisionListController',
+        'stats/(?P<filter>\w+)/$' => 'DifferentialRevisionStatsController',
         'diff/' => array(
           '(?P<id>\d+)/$' => 'DifferentialDiffViewController',
           'create/$' => 'DifferentialDiffCreateController',

src/applications/differential/controller/revisionstats/DifferentialRevisionStatsController.php

@@ -0,0 +1,170 @@
+<?php
+
+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class DifferentialRevisionStatsController extends DifferentialController {
+  private $filter;
+
+  public function shouldRequireLogin() {
+    return true;
+  }
+
+  private function loadRevisions($phid) {
+    $table = new DifferentialRevision();
+    $conn_r = $table->establishConnection('r');
+    $rows = queryfx_all(
+      $conn_r,
+      'SELECT revisions.* FROM %T revisions ' .
+      'JOIN %T comments ON comments.revisionID = revisions.id ' .
+      'JOIN (' .
+      ' SELECT revisionID FROM %T WHERE objectPHID = %s ' .
+      ' UNION ALL ' .
+      ' SELECT id from differential_revision WHERE authorPHID = %s) rel ' .
+      'ON (comments.revisionID = rel.revisionID)' .
+      'WHERE comments.action = %s' .
+      'AND comments.authorPHID = %s',
+      $table->getTableName(),
+      id(new DifferentialComment())->getTableName(),
+      DifferentialRevision::RELATIONSHIP_TABLE,
+      $phid,
+      $phid,
+      $this->filter,
+      $phid
+    );
+    return $table->loadAllFromArray($rows);
+  }
+
+  private function loadComments($phid) {
+    $table = new DifferentialComment();
+    $conn_r = $table->establishConnection('r');
+    $rows = queryfx_all(
+      $conn_r,
+      'SELECT comments.* FROM %T comments ' .
+      'JOIN (' .
+      ' SELECT revisionID FROM %T WHERE objectPHID = %s ' .
+      ' UNION ALL ' .
+      ' SELECT id from differential_revision WHERE authorPHID = %s) rel ' .
+      'ON (comments.revisionID = rel.revisionID)' .
+      'WHERE comments.action = %s' .
+      'AND comments.authorPHID = %s',
+      $table->getTableName(),
+      DifferentialRevision::RELATIONSHIP_TABLE,
+      $phid,
+      $phid,
+      $this->filter,
+      $phid
+    );
+
+    return $table->loadAllFromArray($rows);
+  }
+  public function willProcessRequest(array $data) {
+    $this->filter = idx($data, 'filter');
+  }
+
+  public function processRequest() {
+    $request = $this->getRequest();
+    $user = $request->getUser();
+
+    if ($request->isFormPost()) {
+      $phid_arr = $request->getArr('view_user');
+      $view_target = head($phid_arr);
+      return id(new AphrontRedirectResponse())
+        ->setURI($request->getRequestURI()->alter('phid', $view_target));
+    }
+
+    $params = array_filter(
+      array(
+        'phid' => $request->getStr('phid'),
+      ));
+
+    // Fill in the defaults we'll actually use for calculations if any
+    // parameters are missing.
+    $params += array(
+      'phid' => $user->getPHID(),
+    );
+
+    $side_nav = new AphrontSideNavFilterView();
+    $side_nav->setBaseURI(id(new PhutilURI('/differential/stats/'))
+                          ->alter('phid', $params['phid']));
+    foreach (array(
+               DifferentialAction::ACTION_COMMIT,
+               DifferentialAction::ACTION_ACCEPT,
+               DifferentialAction::ACTION_REJECT,
+               DifferentialAction::ACTION_UPDATE,
+               DifferentialAction::ACTION_COMMENT,
+             ) as $action) {
+      $verb = ucfirst(DifferentialAction::getActionPastTenseVerb($action));
+      $side_nav->addFilter($action, $verb);
+    }
+    $this->filter =
+      $side_nav->selectFilter($this->filter,
+                              DifferentialAction::ACTION_COMMIT);
+
+    $panels = array();
+    $handles = id(new PhabricatorObjectHandleData(array($params['phid'])))
+                  ->loadHandles();
+
+    $filter_form = id(new AphrontFormView())
+      ->setAction('/differential/stats/'.$this->filter.'/')
+      ->setUser($user);
+
+    $filter_form->appendChild(
+      $this->renderControl($params['phid'], $handles));
+    $filter_form->appendChild(id(new AphrontFormSubmitControl())
+                              ->setValue('Filter Revisions'));
+
+    $side_nav->appendChild($filter_form);
+
+    $comments = $this->loadComments($params['phid']);
+    $revisions = $this->loadRevisions($params['phid']);
+
+    $panel = new AphrontPanelView();
+    $panel->setHeader('Differential rate analysis');
+    $panel->appendChild(
+      id(new DifferentialRevisionStatsView())
+      ->setComments($comments)
+      ->setRevisions($revisions)
+      ->setUser($user));
+    $panels[] = $panel;
+
+    foreach ($panels as $panel) {
+      $side_nav->appendChild($panel);
+    }
+
+    return $this->buildStandardPageResponse(
+      $side_nav,
+      array(
+        'title' => 'Differential statistics',
+      ));
+  }
+
+  private function renderControl($view_phid, $handles) {
+    $value = array();
+    if ($view_phid) {
+      $value = array(
+        $view_phid => $handles[$view_phid]->getFullName(),
+      );
+    }
+    return id(new AphrontFormTokenizerControl())
+      ->setDatasource('/typeahead/common/users/')
+      ->setLabel('View User')
+      ->setName('view_user')
+      ->setValue($value)
+      ->setLimit(1);
+  }
+
+}

src/applications/differential/controller/revisionstats/__init__.php

@@ -0,0 +1,27 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'aphront/response/redirect');
+phutil_require_module('phabricator', 'applications/differential/constants/action');
+phutil_require_module('phabricator', 'applications/differential/controller/base');
+phutil_require_module('phabricator', 'applications/differential/storage/comment');
+phutil_require_module('phabricator', 'applications/differential/storage/revision');
+phutil_require_module('phabricator', 'applications/differential/view/revisionstats');
+phutil_require_module('phabricator', 'applications/phid/handle/data');
+phutil_require_module('phabricator', 'storage/queryfx');
+phutil_require_module('phabricator', 'view/form/base');
+phutil_require_module('phabricator', 'view/form/control/submit');
+phutil_require_module('phabricator', 'view/form/control/tokenizer');
+phutil_require_module('phabricator', 'view/layout/panel');
+phutil_require_module('phabricator', 'view/layout/sidenavfilter');
+
+phutil_require_module('phutil', 'parser/uri');
+phutil_require_module('phutil', 'utils');
+
+
+phutil_require_source('DifferentialRevisionStatsController.php');

src/applications/differential/view/revisionstats/DifferentialRevisionStatsView.php

@@ -0,0 +1,152 @@
+<?php
+
+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Render some distracting statistics on revisions
+ */
+final class DifferentialRevisionStatsView extends AphrontView {
+  private $comments;
+  private $revisions;
+  private $user;
+
+  public function setRevisions(array $revisions) {
+    $this->revisions = $revisions;
+    return $this;
+  }
+
+  public function setComments(array $comments) {
+    $this->comments = $comments;
+    return $this;
+  }
+  public function setUser($user) {
+    $this->user = $user;
+    return $this;
+  }
+
+  public function render() {
+    $user = $this->user;
+    if (!$user) {
+      throw new Exception("Call setUser() before render()!");
+    }
+
+    $id_to_revision_map = array();
+    foreach ($this->revisions as $rev) {
+      $id_to_revision_map[$rev->getID()] = $rev;
+    }
+    $revisions_seen = array();
+
+    $dates = array();
+    $counts = array();
+    $lines = array();
+    $boosts = array();
+    $days_with_diffs = array();
+    $count_active = array();
+    $now = time();
+    $row_array = array();
+
+    foreach (array(
+               '1 week', '2 weeks', '3 weeks',
+               '1 month', '2 months', '3 months', '6 months', '9 months',
+               '1 year', '18 months',
+               '2 years', '3 years', '4 years', '5 years',
+             ) as $age) {
+      $dates[$age] = strtotime($age . ' ago');
+      $counts[$age] = 0;
+      $lines[$age] = 0;
+      $count_active[$age] = 0;
+    }
+
+    foreach ($this->comments as $comment) {
+      $rev_date = $comment->getDateCreated();
+
+      $day = phabricator_date($rev_date, $user);
+      $old_daycount = idx($days_with_diffs, $day, 0);
+      $days_with_diffs[$day] = $old_daycount + 1;
+
+      $rev_id = $comment->getRevisionID();
+
+      if (idx($revisions_seen, $rev_id)) {
+        continue;
+      }
+      $rev = $id_to_revision_map[$rev_id];
+      $revisions_seen[$rev_id] = true;
+
+      foreach ($dates as $age => $cutoff) {
+        if ($cutoff > $rev_date) {
+          continue;
+        }
+        if ($rev) {
+          $lines[$age] += $rev->getLineCount();
+        }
+        $counts[$age]++;
+        if (!$old_daycount) {
+          $count_active[$age]++;
+        }
+      }
+    }
+
+    $old_count = 0;
+    foreach ($dates as $age => $cutoff) {
+      $weeks = ($now - $cutoff + 0.) / (7 * 60 * 60 * 24);
+      if ($old_count == $counts[$age]) {
+        continue;
+      }
+      $old_count = $counts[$age];
+
+      $row_array[$age] = array(
+        'Revisions per week' => number_format($counts[$age] / $weeks, 2),
+        'Lines per week' => number_format($lines[$age] / $weeks, 1),
+        'Active days per week' =>
+          number_format($count_active[$age] / $weeks, 1),
+        'Revisions' => number_format($counts[$age]),
+        'Lines' => number_format($lines[$age]),
+        'Lines per diff' => number_format($lines[$age] /
+                                          ($counts[$age] + 0.0001)),
+        'Active days' => number_format($count_active[$age]),
+      );
+    }
+
+    $rows = array();
+    $row_names = array_keys(head($row_array));
+    foreach ($row_names as $row_name) {
+      $rows[] = array($row_name);
+    }
+    foreach (array_keys($dates) as $age) {
+      $i = 0;
+      foreach ($row_names as $row_name) {
+        $rows[$i][] = idx(idx($row_array, $age), $row_name, '-');
+        ++$i;
+      }
+    }
+
+    $table = new AphrontTableView($rows);
+    $table->setColumnClasses(
+      array(
+        'wide pri',
+      ));
+
+    $table->setHeaders(
+      array_merge(
+        array(
+          'Metric',
+        ),
+        array_keys($dates)));
+
+    return $table->render();
+  }
+}

src/applications/differential/view/revisionstats/__init__.php

@@ -0,0 +1,16 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'view/base');
+phutil_require_module('phabricator', 'view/control/table');
+phutil_require_module('phabricator', 'view/utils');
+
+phutil_require_module('phutil', 'utils');
+
+
+phutil_require_source('DifferentialRevisionStatsView.php');