Add a dialog explaining what happened to wiki pages

Summary: Ayep.

Test Plan: {F233319}

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D10845

src/__phutil_library_map__.php

@@ -2142,6 +2142,7 @@ phutil_register_library_map(array(
     'PhabricatorProjectUIEventListener' => 'applications/project/events/PhabricatorProjectUIEventListener.php',
     'PhabricatorProjectUpdateController' => 'applications/project/controller/PhabricatorProjectUpdateController.php',
     'PhabricatorProjectWatchController' => 'applications/project/controller/PhabricatorProjectWatchController.php',
+    'PhabricatorProjectWikiExplainController' => 'applications/project/controller/PhabricatorProjectWikiExplainController.php',
     'PhabricatorQuery' => 'infrastructure/query/PhabricatorQuery.php',
     'PhabricatorRecaptchaConfigOptions' => 'applications/config/option/PhabricatorRecaptchaConfigOptions.php',
     'PhabricatorRedirectController' => 'applications/base/controller/PhabricatorRedirectController.php',
@@ -5264,6 +5265,7 @@ phutil_register_library_map(array(
     'PhabricatorProjectUIEventListener' => 'PhabricatorEventListener',
     'PhabricatorProjectUpdateController' => 'PhabricatorProjectController',
     'PhabricatorProjectWatchController' => 'PhabricatorProjectController',
+    'PhabricatorProjectWikiExplainController' => 'PhabricatorProjectController',
     'PhabricatorRecaptchaConfigOptions' => 'PhabricatorApplicationConfigOptions',
     'PhabricatorRedirectController' => 'PhabricatorController',
     'PhabricatorRefreshCSRFController' => 'PhabricatorAuthController',

src/applications/project/application/PhabricatorProjectApplication.php

@@ -83,7 +83,7 @@ final class PhabricatorProjectApplication extends PhabricatorApplication {
         'history/(?P<id>[1-9]\d*)/' => 'PhabricatorProjectHistoryController',
         '(?P<action>watch|unwatch)/(?P<id>[1-9]\d*)/'
           => 'PhabricatorProjectWatchController',
-
+        'wiki/' => 'PhabricatorProjectWikiExplainController',
       ),
       '/tag/' => array(
         '(?P<slug>[^/]+)/' => 'PhabricatorProjectProfileController',

src/applications/project/controller/PhabricatorProjectProfileController.php

@@ -261,6 +261,12 @@ final class PhabricatorProjectProfileController
       }
     }
 
+    $view->addAction(
+      id(new PhabricatorActionView())
+        ->setIcon('fa-book grey')
+        ->setName(pht('View Wiki'))
+        ->setWorkflow(true)
+        ->setHref('/project/wiki/'));
 
     return $view;
   }

src/applications/project/controller/PhabricatorProjectWikiExplainController.php

@@ -0,0 +1,31 @@
+<?php
+
+final class PhabricatorProjectWikiExplainController
+  extends PhabricatorProjectController {
+
+  public function handleRequest(AphrontRequest $request) {
+    return $this->newDialog()
+      ->setTitle(pht('Wikis Have Changed'))
+      ->appendParagraph(
+        pht(
+          'Wiki pages in Phriction have been upgraded to have more powerful '.
+          'support for policies and access control. Each page can now have '.
+          'its own policies.'))
+      ->appendParagraph(
+        pht(
+          'This change obsoletes dedicated project wiki pages and '.
+          'resolves a number of issues they had: you can now have '.
+          'multiple wiki pages for a project, put them anywhere, give '.
+          'them custom access controls, and rename them (or the project) '.
+          'more easily and with fewer issues.'))
+      ->appendParagraph(
+        pht(
+          'If you want to point users of this project to specific wiki '.
+          'pages with relevant documentation or information, edit the project '.
+          'description and add links. You can use the %s syntax to link to a '.
+          'wiki page.',
+          phutil_tag('tt', array(), '[[ example/page/ ]]')))
+      ->addCancelButton('/', pht('Okay'));
+  }
+
+}