Require TokenizerControl to always have a datasource

Summary:
Ref T4100. I can simplify the logic a bit here by moving some rendering into the datasources, but a few TokenizerControls currently don't have datasources.

Require datasources and always provide datasources.

Test Plan:
  - Used previously-datasourceless controls (e.g., "Add Reviewers").
  - Used normal controls.
  - Manually verified that no other controls are missing datasources.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T4100

Differential Revision: https://secure.phabricator.com/D12456

src/applications/differential/view/DifferentialAddCommentView.php

@@ -67,6 +67,9 @@ final class DifferentialAddCommentView extends AphrontView {
       'resign' => pht('Suggest Reviewers'),
     );
 
+    $mailable_source = new PhabricatorMetaMTAMailableDatasource();
+    $reviewer_source = new PhabricatorProjectOrUserDatasource();
+
     $form = new AphrontFormView();
     $form
       ->setWorkflow(true)
@@ -88,7 +91,8 @@ final class DifferentialAddCommentView extends AphrontView {
           ->setControlID('add-reviewers')
           ->setControlStyle($enable_reviewers ? null : 'display: none')
           ->setID('add-reviewers-tokenizer')
-          ->setDisableBehavior(true))
+          ->setDisableBehavior(true)
+          ->setDatasource($reviewer_source))
       ->appendControl(
         id(new AphrontFormTokenizerControl())
           ->setLabel(pht('Add Subscribers'))
@@ -96,7 +100,8 @@ final class DifferentialAddCommentView extends AphrontView {
           ->setControlID('add-ccs')
           ->setControlStyle($enable_ccs ? null : 'display: none')
           ->setID('add-ccs-tokenizer')
-          ->setDisableBehavior(true))
+          ->setDisableBehavior(true)
+          ->setDatasource($mailable_source))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
           ->setName('comment')
@@ -108,9 +113,6 @@ final class DifferentialAddCommentView extends AphrontView {
         id(new AphrontFormSubmitControl())
           ->setValue(pht('Submit')));
 
-    $mailable_source = new PhabricatorMetaMTAMailableDatasource();
-    $reviewer_source = new PhabricatorProjectOrUserDatasource();
-
     Javelin::initBehavior(
       'differential-add-reviewers-and-ccs',
       array(

src/applications/diffusion/controller/DiffusionCommitController.php

@@ -677,6 +677,9 @@ final class DiffusionCommitController extends DiffusionController {
 
     $actions = $this->getAuditActions($commit, $audit_requests);
 
+    $mailable_source = new PhabricatorMetaMTAMailableDatasource();
+    $auditor_source = new DiffusionAuditorDatasource();
+
     $form = id(new AphrontFormView())
       ->setUser($user)
       ->setAction('/audit/addcomment/')
@@ -694,7 +697,8 @@ final class DiffusionCommitController extends DiffusionController {
           ->setControlID('add-auditors')
           ->setControlStyle('display: none')
           ->setID('add-auditors-tokenizer')
-          ->setDisableBehavior(true))
+          ->setDisableBehavior(true)
+          ->setDatasource($auditor_source))
       ->appendControl(
         id(new AphrontFormTokenizerControl())
           ->setLabel(pht('Add CCs'))
@@ -702,7 +706,8 @@ final class DiffusionCommitController extends DiffusionController {
           ->setControlID('add-ccs')
           ->setControlStyle('display: none')
           ->setID('add-ccs-tokenizer')
-          ->setDisableBehavior(true))
+          ->setDisableBehavior(true)
+          ->setDatasource($mailable_source))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
           ->setLabel(pht('Comments'))
@@ -718,9 +723,6 @@ final class DiffusionCommitController extends DiffusionController {
     $header->setHeader(
       $is_serious ? pht('Audit Commit') : pht('Creative Accounting'));
 
-    $mailable_source = new PhabricatorMetaMTAMailableDatasource();
-    $auditor_source = new DiffusionAuditorDatasource();
-
     Javelin::initBehavior(
       'differential-add-reviewers-and-ccs',
       array(

src/applications/maniphest/controller/ManiphestTaskDetailController.php

@@ -182,6 +182,10 @@ final class ManiphestTaskDetailController extends ManiphestController {
       $draft_text = null;
     }
 
+    $projects_source = new PhabricatorProjectDatasource();
+    $users_source = new PhabricatorPeopleDatasource();
+    $mailable_source = new PhabricatorMetaMTAMailableDatasource();
+
     $comment_form = new AphrontFormView();
     $comment_form
       ->setUser($user)
@@ -209,7 +213,8 @@ final class ManiphestTaskDetailController extends ManiphestController {
           ->setControlID('assign_to')
           ->setControlStyle('display: none')
           ->setID('assign-tokenizer')
-          ->setDisableBehavior(true))
+          ->setDisableBehavior(true)
+          ->setDatasource($users_source))
       ->appendControl(
         id(new AphrontFormTokenizerControl())
           ->setLabel(pht('CCs'))
@@ -217,7 +222,8 @@ final class ManiphestTaskDetailController extends ManiphestController {
           ->setControlID('ccs')
           ->setControlStyle('display: none')
           ->setID('cc-tokenizer')
-          ->setDisableBehavior(true))
+          ->setDisableBehavior(true)
+          ->setDatasource($mailable_source))
       ->appendChild(
         id(new AphrontFormSelectControl())
           ->setLabel(pht('Priority'))
@@ -233,7 +239,8 @@ final class ManiphestTaskDetailController extends ManiphestController {
           ->setControlID('projects')
           ->setControlStyle('display: none')
           ->setID('projects-tokenizer')
-          ->setDisableBehavior(true))
+          ->setDisableBehavior(true)
+          ->setDatasource($projects_source))
       ->appendChild(
         id(new AphrontFormFileControl())
           ->setLabel(pht('File'))
@@ -260,10 +267,6 @@ final class ManiphestTaskDetailController extends ManiphestController {
       PhabricatorTransactions::TYPE_EDGE        => 'projects',
     );
 
-    $projects_source = new PhabricatorProjectDatasource();
-    $users_source = new PhabricatorPeopleDatasource();
-    $mailable_source = new PhabricatorMetaMTAMailableDatasource();
-
     $tokenizer_map = array(
       PhabricatorTransactions::TYPE_EDGE => array(
         'id'          => 'projects-tokenizer',

src/view/form/control/AphrontFormTokenizerControl.php

@@ -51,18 +51,16 @@ final class AphrontFormTokenizerControl extends AphrontFormControl {
     }
 
     $datasource = $this->datasource;
-    if ($datasource) {
+    if (!$datasource) {
-      $datasource->setViewer($this->getUser());
+      throw new Exception(
+        pht('You must set a datasource to use a TokenizerControl.'));
     }
+    $datasource->setViewer($this->getUser());
 
     $placeholder = null;
     if (!strlen($this->placeholder)) {
-      if ($datasource) {
       $placeholder = $datasource->getPlaceholderText();
     }
-    } else {
-      $placeholder = $this->placeholder;
-    }
 
     $tokens = array();
     $values = nonempty($this->getValue(), array());
@@ -71,7 +69,7 @@ final class AphrontFormTokenizerControl extends AphrontFormControl {
         $token = PhabricatorTypeaheadTokenView::newFromHandle($handles[$value]);
       } else {
         $token = null;
-        if ($datasource) {
+
         $function = $datasource->parseFunction($value);
         if ($function) {
           $token_list = $datasource->renderFunctionTokens(
@@ -79,7 +77,6 @@ final class AphrontFormTokenizerControl extends AphrontFormControl {
             array($function['argv']));
           $token = head($token_list);
         }
-        }
 
         if (!$token) {
           $name = pht('Invalid Function: %s', $value);
@@ -105,18 +102,11 @@ final class AphrontFormTokenizerControl extends AphrontFormControl {
       $username = $this->user->getUsername();
     }
 
-    $datasource_uri = null;
-    $browse_uri = null;
-    if ($datasource) {
-      $datasource->setViewer($this->getUser());
-
     $datasource_uri = $datasource->getDatasourceURI();
-
     $browse_uri = $datasource->getBrowseURI();
     if ($browse_uri) {
       $template->setBrowseURI($browse_uri);
     }
-    }
 
     if (!$this->disableBehavior) {
       Javelin::initBehavior('aphront-basic-tokenizer', array(