Adding conduit API method to find owner for the affected file

Summary:
Adding method that given a path will go up the folder hierarchy until it finds
the owning package
and return owners for that package.

Task ID: #403724

Test Plan:
Tried the new API call through console on various path combinations

Reviewed By: epriestley
Reviewers: epriestley, dpepper, tuomaspelkonen
CC: epriestley, Leon
Revert Plan:
n/a

Tags: bootcamp, Push Efficiency

- begin *PUBLIC* platform impact section -
Bugzilla: #
- end platform impact -

Differential Revision: 126

src/__phutil_library_map__.php

@@ -89,6 +89,7 @@ phutil_register_library_map(array(
     'ConduitAPI_differential_updaterevision_Method' => 'applications/conduit/method/differential/updaterevision',
     'ConduitAPI_diffusion_getcommits_Method' => 'applications/conduit/method/diffusion/getcommits',
     'ConduitAPI_file_upload_Method' => 'applications/conduit/method/file/upload',
+    'ConduitAPI_path_getowners_Method' => 'applications/conduit/method/path/getowners',
     'ConduitAPI_user_find_Method' => 'applications/conduit/method/user/find',
     'ConduitAPI_user_whoami_Method' => 'applications/conduit/method/user/whoami',
     'ConduitException' => 'applications/conduit/protocol/exception',
@@ -537,6 +538,7 @@ phutil_register_library_map(array(
     'ConduitAPI_differential_updaterevision_Method' => 'ConduitAPIMethod',
     'ConduitAPI_diffusion_getcommits_Method' => 'ConduitAPIMethod',
     'ConduitAPI_file_upload_Method' => 'ConduitAPIMethod',
+    'ConduitAPI_path_getowners_Method' => 'ConduitAPIMethod',
     'ConduitAPI_user_find_Method' => 'ConduitAPIMethod',
     'ConduitAPI_user_whoami_Method' => 'ConduitAPIMethod',
     'DarkConsoleConfigPlugin' => 'DarkConsolePlugin',

src/applications/conduit/method/path/getowners/ConduitAPI_path_getowners_Method.php

@@ -0,0 +1,84 @@
+<?php
+
+/*
+ * Copyright 2011 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 ConduitAPI_path_getowners_Method extends ConduitAPIMethod {
+
+  public function getMethodDescription() {
+    return "Find owners package given its name";
+  }
+
+  public function defineParamTypes() {
+    return array(
+      'repositoryCallsign' => 'required nonempty string',
+      'path' => 'required nonempty string'
+    );
+  }
+
+  public function defineReturnType() {
+    return 'array of packages containing phid, primary_owner (phid=>username),'.
+      'owners(array of phid=>username)';
+  }
+
+  public function defineErrorTypes() {
+    return array(
+      'ERR_REP_NOT_FOUND'  => 'The repository callsign is not recognized',
+      'ERR_PATH_NOT_FOUND' => 'The specified path is not known to any package',
+    );
+  }
+
+  protected function execute(ConduitAPIRequest $request) {
+
+    $repository = id(new PhabricatorRepository())->loadOneWhere('callsign = %s',
+      $request->getValue('repositoryCallsign'));
+
+    if (empty($repository)) {
+      throw new ConduitException('ERR_REP_NOT_FOUND');
+    }
+
+    $packages = PhabricatorOwnersPackage::loadOwningPackages(
+      $repository, $request->getValue('path'));
+    if (empty($packages)) {
+      throw new ConduitException('ERR_PATH_NOT_FOUND');
+    }
+
+    $owner = new PhabricatorOwnersOwner();
+    $user = new PhabricatorUser();
+    $result = array();
+    foreach ($packages as $package) {
+      $p_result = array();
+      $p_result['phid'] = $package->getID();
+      $primary_owner_phid = $package->getPrimaryOwnerPHID();
+      if (!empty($primary_owner_phid)) {
+        $p_user =  $user->loadOneWhere('phid = %s',
+          $primary_owner_phid);
+        $p_result['primaryOwner'] = $p_user->getPhid();
+      }
+
+      $p_owners = $owner->loadAllForPackages(array($package));
+      $p_users = $user->loadAllWhere('phid IN (%Ls)',
+        mpull($p_owners, 'getUserPHID'));
+
+      $p_result['owners'] = array_values(mpull($p_users, 'getPhid'));
+
+      $result[] = $p_result;
+    }
+
+    return $result;
+  }
+
+}

src/applications/conduit/method/path/getowners/__init__.php

@@ -0,0 +1,19 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/conduit/method/base');
+phutil_require_module('phabricator', 'applications/conduit/protocol/exception');
+phutil_require_module('phabricator', 'applications/owners/storage/owner');
+phutil_require_module('phabricator', 'applications/owners/storage/package');
+phutil_require_module('phabricator', 'applications/people/storage/user');
+phutil_require_module('phabricator', 'applications/repository/storage/repository');
+
+phutil_require_module('phutil', 'utils');
+
+
+phutil_require_source('ConduitAPI_path_getowners_Method.php');

src/applications/owners/storage/package/PhabricatorOwnersPackage.php

@@ -79,29 +79,71 @@ class PhabricatorOwnersPackage extends PhabricatorOwnersDAO {
     );
 
     foreach ($paths as $path) {
-      $trailing_slash = preg_match('@/$@', $path) ? '/' : '';
-      $path = trim($path, '/');
-      $parts = explode('/', $path);
-      while (count($parts)) {
-        $fragments['/'.implode('/', $parts).$trailing_slash] = true;
-        $trailing_slash = '/';
-        array_pop($parts);
-      }
+      $fragments += self::splitPath($path);
     }
 
+    return self::loadPackagesForPaths($repository, array_keys($fragments));
+ }
+
+ public static function loadOwningPackages($repository, $path) {
+    if (empty($path)) {
+      return array();
+    }
+
+    $fragments = self::splitPath($path);
+    return self::loadPackagesForPaths($repository, array_keys($fragments), 1);
+ }
+
+  private static function loadPackagesForPaths(
+    PhabricatorRepository $repository,
+    array $paths,
+    $limit = 0) {
     $package = new PhabricatorOwnersPackage();
     $path = new PhabricatorOwnersPath();
+    $conn = $package->establishConnection('r');
+
+    $repository_clause = qsprintf($conn, 'AND p.repositoryPHID = %s',
+      $repository->getPHID());
+
+    $limit_clause = '';
+    if (!empty($limit)) {
+      $limit_clause = qsprintf($conn, 'LIMIT %d', $limit);
+    }
+
     $data = queryfx_all(
-      $package->establishConnection('r'),
-      'SELECT pkg.* FROM %T pkg JOIN %T p ON p.packageID = pkg.id
-        WHERE p.repositoryPHID = %s
-          AND p.path IN (%Ls)',
+      $conn,
+      'SELECT pkg.id FROM %T pkg JOIN %T p ON p.packageID = pkg.id
+        WHERE p.path IN (%Ls) %Q ORDER BY LENGTH(p.path) DESC %Q',
       $package->getTableName(),
       $path->getTableName(),
-      $repository->getPHID(),
-      array_keys($fragments));
+      $paths,
+      $repository_clause,
+      $limit_clause);
 
-    return $package->loadAllFromArray($data);
+    $ids = ipull($data, 'id');
+
+    if (empty($ids)) {
+      return array();
+    }
+
+    $order = array();
+    foreach ($ids as $id) {
+      if (empty($order[$id])) {
+        $order[$id] = true;
+      }
+    }
+
+    $packages = $package->loadAllWhere('id in (%Ld)', array_keys($order));
+
+    $result = array();
+    // Reorder packages according to specificity.
+    foreach ($packages as $package) {
+      $result[$package->getID()] = $package;
+    }
+
+    $result = array_select_keys($result, array_keys($order));
+
+    return $result;
   }
 
   public function save() {
@@ -167,4 +209,16 @@ class PhabricatorOwnersPackage extends PhabricatorOwnersDAO {
     return parent::delete();
   }
 
+  private static function splitPath($path) {
+    $result = array();
+    $trailing_slash = preg_match('@/$@', $path) ? '/' : '';
+    $path = trim($path, '/');
+    $parts = explode('/', $path);
+    while (count($parts)) {
+      $result['/'.implode('/', $parts).$trailing_slash] = true;
+      $trailing_slash = '/';
+      array_pop($parts);
+    }
+    return $result;
+  }
 }

src/applications/owners/storage/package/__init__.php

@@ -10,6 +10,7 @@ phutil_require_module('phabricator', 'applications/owners/storage/base');
 phutil_require_module('phabricator', 'applications/owners/storage/owner');
 phutil_require_module('phabricator', 'applications/owners/storage/path');
 phutil_require_module('phabricator', 'applications/phid/storage/phid');
+phutil_require_module('phabricator', 'storage/qsprintf');
 phutil_require_module('phabricator', 'storage/queryfx');
 
 phutil_require_module('phutil', 'utils');