Add an option to switch tokenizers to use "ondemand" instead of "preloaded"

datasources

Summary:
The open source Phabricator has like 3,500 user accounts now and it takes a
while to pull/render them. Add an option to switch to ondemand for large
installs.

I'll follow up with a patch at some point to address a couple of name things:

  - Denormalize last names into a keyed column (although this evidences some
bias toward the western world).
  - Force all usernames to lowercase (sorry Girish, Makinde).

Also this patch is so clean it's crazy.

Didn't bother with other object types for now, I'm planning to dedicate a few
days to Projects at some point and I'll flesh out some auxiliary features like
this when I do that.

Test Plan: Switched to ondemand, verified data was queried dynamically. Switched
back, verified data was preloaded.

Reviewers: jungejason, nh, tuomaspelkonen, aran

Reviewed By: nh

CC: aran, epriestley, nh

Differential Revision: 923

conf/default.conf.php

@@ -402,6 +402,20 @@ return array(
   // You can enable traces for development to make it easier to debug problems.
   'phabricator.show-stack-traces' => false,
 
+  // Tokenizers are UI controls which let the user select other users, email
+  // addresses, project names, etc., by typing the first few letters and having
+  // the control autocomplete from a list. They can load their data in two ways:
+  // either in a big chunk up front, or as the user types. By default, the data
+  // is loaded in a big chunk. This is simpler and performs better for small
+  // datasets. However, if you have a very large number of users or projects,
+  // (in the ballpark of more than a thousand), loading all that data may become
+  // slow enough that it's worthwhile to query on demand instead. This makes
+  // the typeahead slightly less responsive but overall performance will be much
+  // better if you have a ton of stuff. You can figure out which setting is
+  // best for your install by changing this setting and then playing with a
+  // user tokenizer (like the user selectors in Maniphest or Differential) and
+  // seeing which setting loads faster and feels better.
+  'tokenizer.ondemand'          => false,
 
 // -- Files ----------------------------------------------------------------- //
 

src/__celerity_resource_map__.php

@@ -332,7 +332,7 @@ celerity_register_resource_map(array(
   ),
   'javelin-behavior-aphront-basic-tokenizer' =>
   array(
-    'uri' => '/res/5e183bd5/rsrc/js/application/core/behavior-tokenizer.js',
+    'uri' => '/res/9be30797/rsrc/js/application/core/behavior-tokenizer.js',
     'type' => 'js',
     'requires' =>
     array(
@@ -340,8 +340,9 @@ celerity_register_resource_map(array(
       1 => 'javelin-typeahead',
       2 => 'javelin-tokenizer',
       3 => 'javelin-typeahead-preloaded-source',
-      4 => 'javelin-dom',
-      5 => 'javelin-stratcom',
+      4 => 'javelin-typeahead-ondemand-source',
+      5 => 'javelin-dom',
+      6 => 'javelin-stratcom',
     ),
     'disk' => '/rsrc/js/application/core/behavior-tokenizer.js',
   ),
@@ -1418,6 +1419,22 @@ celerity_register_resource_map(array(
       'uri' => '/res/pkg/3dbf4083/javelin.pkg.js',
       'type' => 'js',
     ),
+    '4aa8c13f' =>
+    array(
+      'name' => 'typeahead.pkg.js',
+      'symbols' =>
+      array(
+        0 => 'javelin-typeahead',
+        1 => 'javelin-typeahead-normalizer',
+        2 => 'javelin-typeahead-source',
+        3 => 'javelin-typeahead-preloaded-source',
+        4 => 'javelin-typeahead-ondemand-source',
+        5 => 'javelin-tokenizer',
+        6 => 'javelin-behavior-aphront-basic-tokenizer',
+      ),
+      'uri' => '/res/pkg/4aa8c13f/typeahead.pkg.js',
+      'type' => 'js',
+    ),
     '7bf96a66' =>
     array(
       'name' => 'differential.pkg.css',
@@ -1465,22 +1482,6 @@ celerity_register_resource_map(array(
       'uri' => '/res/pkg/982ad44b/differential.pkg.js',
       'type' => 'js',
     ),
-    'ac869011' =>
-    array(
-      'name' => 'typeahead.pkg.js',
-      'symbols' =>
-      array(
-        0 => 'javelin-typeahead',
-        1 => 'javelin-typeahead-normalizer',
-        2 => 'javelin-typeahead-source',
-        3 => 'javelin-typeahead-preloaded-source',
-        4 => 'javelin-typeahead-ondemand-source',
-        5 => 'javelin-tokenizer',
-        6 => 'javelin-behavior-aphront-basic-tokenizer',
-      ),
-      'uri' => '/res/pkg/ac869011/typeahead.pkg.js',
-      'type' => 'js',
-    ),
     'f6422902' =>
     array(
       'name' => 'core.pkg.css',
@@ -1527,7 +1528,7 @@ celerity_register_resource_map(array(
     'differential-table-of-contents-css' => '7bf96a66',
     'diffusion-commit-view-css' => '03ef179e',
     'javelin-behavior' => '3dbf4083',
-    'javelin-behavior-aphront-basic-tokenizer' => 'ac869011',
+    'javelin-behavior-aphront-basic-tokenizer' => '4aa8c13f',
     'javelin-behavior-aphront-form-disable-on-submit' => '95c67dcd',
     'javelin-behavior-differential-diff-radios' => '982ad44b',
     'javelin-behavior-differential-edit-inline-comments' => '982ad44b',
@@ -1543,12 +1544,12 @@ celerity_register_resource_map(array(
     'javelin-mask' => '95c67dcd',
     'javelin-request' => '3dbf4083',
     'javelin-stratcom' => '3dbf4083',
-    'javelin-tokenizer' => 'ac869011',
-    'javelin-typeahead' => 'ac869011',
-    'javelin-typeahead-normalizer' => 'ac869011',
-    'javelin-typeahead-ondemand-source' => 'ac869011',
-    'javelin-typeahead-preloaded-source' => 'ac869011',
-    'javelin-typeahead-source' => 'ac869011',
+    'javelin-tokenizer' => '4aa8c13f',
+    'javelin-typeahead' => '4aa8c13f',
+    'javelin-typeahead-normalizer' => '4aa8c13f',
+    'javelin-typeahead-ondemand-source' => '4aa8c13f',
+    'javelin-typeahead-preloaded-source' => '4aa8c13f',
+    'javelin-typeahead-source' => '4aa8c13f',
     'javelin-uri' => '3dbf4083',
     'javelin-util' => '3dbf4083',
     'javelin-vector' => '3dbf4083',

src/applications/typeahead/controller/common/PhabricatorTypeaheadCommonDatasourceController.php

@@ -25,6 +25,9 @@ class PhabricatorTypeaheadCommonDatasourceController
 
   public function processRequest() {
 
+    $request = $this->getRequest();
+    $query = $request->getStr('q');
+
     $need_users = false;
     $need_all_users = false;
     $need_lists = false;
@@ -70,7 +73,16 @@ class PhabricatorTypeaheadCommonDatasourceController
     }
 
     if ($need_users) {
-      $users = id(new PhabricatorUser())->loadAll();
+      if ($query) {
+        // TODO: We probably need to split last names here. Workaround until
+        // we get that up and running is to not enable server-side datasources.
+        $users = id(new PhabricatorUser())->loadAllWhere(
+          '(userName LIKE %> OR realName LIKE %>)',
+          $query,
+          $query);
+      } else {
+        $users = id(new PhabricatorUser())->loadAll();
+      }
       foreach ($users as $user) {
         if (!$need_all_users) {
           if ($user->getIsSystemAgent()) {

src/view/form/control/tokenizer/AphrontFormTokenizerControl.php

@@ -58,10 +58,11 @@ class AphrontFormTokenizerControl extends AphrontFormControl {
 
     if (!$this->disableBehavior) {
       Javelin::initBehavior('aphront-basic-tokenizer', array(
-        'id'    => $id,
-        'src'   => $this->datasource,
-        'value' => $values,
-        'limit' => $this->limit,
+        'id'        => $id,
+        'src'       => $this->datasource,
+        'value'     => $values,
+        'limit'     => $this->limit,
+        'ondemand'  => PhabricatorEnv::getEnvConfig('tokenizer.ondemand'),
       ));
     }
 

src/view/form/control/tokenizer/__init__.php

@@ -7,6 +7,7 @@
 
 
 phutil_require_module('phabricator', 'infrastructure/celerity/api');
+phutil_require_module('phabricator', 'infrastructure/env');
 phutil_require_module('phabricator', 'infrastructure/javelin/api');
 phutil_require_module('phabricator', 'view/control/tokenizer');
 phutil_require_module('phabricator', 'view/form/control/base');

webroot/rsrc/js/application/core/behavior-tokenizer.js

@@ -4,6 +4,7 @@
  *           javelin-typeahead
  *           javelin-tokenizer
  *           javelin-typeahead-preloaded-source
+ *           javelin-typeahead-ondemand-source
  *           javelin-dom
  *           javelin-stratcom
  */
@@ -11,7 +12,12 @@
 JX.behavior('aphront-basic-tokenizer', function(config) {
   var root = JX.$(config.id);
 
-  var datasource = new JX.TypeaheadPreloadedSource(config.src);
+  var datasource;
+  if (config.ondemand) {
+    datasource = new JX.TypeaheadOnDemandSource(config.src);
+  } else {
+    datasource = new JX.TypeaheadPreloadedSource(config.src);
+  }
 
   var typeahead = new JX.Typeahead(
     root,