API Make CMSMain more generic

Remove hardcoded references to pages and SiteTree
Remove assumption that records are versioned
Remove or validate assumptions about methods on the model class
Improve general architecture of CMSMain

_config.php

@@ -1,8 +1,6 @@
 <?php
 
 use SilverStripe\Admin\CMSMenu;
-use SilverStripe\CMS\Controllers\CMSMain;
-use SilverStripe\CMS\Controllers\CMSPageAddController;
 use SilverStripe\CMS\Controllers\CMSPageEditController;
 use SilverStripe\CMS\Controllers\CMSPageSettingsController;
 use SilverStripe\CMS\Model\SiteTree;
@@ -32,7 +30,5 @@
     [SiteTree::class, 'link_shortcode_handler']
 );
 
-CMSMenu::remove_menu_class(CMSMain::class);
 CMSMenu::remove_menu_class(CMSPageEditController::class);
 CMSMenu::remove_menu_class(CMSPageSettingsController::class);
-CMSMenu::remove_menu_class(CMSPageAddController::class);

_config/adminpanels.yml

@@ -2,4 +2,4 @@
 Name: cmsdefaultadmin
 ---
 SilverStripe\Admin\AdminRootController:
-  default_panel: SilverStripe\CMS\Controllers\CMSPagesController
+  default_panel: SilverStripe\CMS\Controllers\CMSMain

_config/cache.yml

@@ -4,15 +4,15 @@ After:
   - '#corecache'
 ---
 SilverStripe\Core\Injector\Injector:
-  Psr\SimpleCache\CacheInterface.CMSMain_SiteTreeHints:
+  Psr\SimpleCache\CacheInterface.CMSMain_TreeHints:
     factory: SilverStripe\Core\Cache\CacheFactory
     constructor:
-      namespace: "CMSMain_SiteTreeHints"
+      namespace: "CMSMain_TreeHints"
   Psr\SimpleCache\CacheInterface.SiteTree_CreatableChildren:
     factory: SilverStripe\Core\Cache\CacheFactory
     constructor:
       namespace: "SiteTree_CreatableChildren"
   Psr\SimpleCache\CacheInterface.SiteTree_PageIcons:
     factory: SilverStripe\Core\Cache\CacheFactory
     constructor:
-      namespace: "SiteTree_PageIcons"
+      namespace: "SiteTree_PageIcons"

client/src/legacy/CMSMain.AddForm.js

@@ -123,16 +123,16 @@ $.entwine('ss', function($){
      * @param {string} defaultChildClass
      */
     updateSelectionFilter: function(disallowedChildren, defaultChildClass) {
-      var currentSelection = this.find('#Form_AddForm_PageType div.radio.selected')[0];
+      var currentSelection = this.find('#Form_AddForm_RecordType div.radio.selected')[0];
       var keepSelection = false;
 
       // Limit selection
       var allAllowed = null; // troolian
-      this.find('#Form_AddForm_PageType div.radio').each(function (i, el) {
+      this.find('#Form_AddForm_RecordType div.radio').each(function (i, el) {
         var className = $(this).find('input').val(),
           isAllowed = ($.inArray(className, disallowedChildren) === -1);
 
-        // Avoid changing the selected pagetype if still allowed
+        // Avoid changing the selected record type if still allowed
         if (el === currentSelection && isAllowed) {
           keepSelection = true;
         }
@@ -153,16 +153,16 @@ $.entwine('ss', function($){
         var selectedEl = $(currentSelection).parents('li:first');
       } else if (defaultChildClass) {
         var selectedEl = this
-          .find('#Form_AddForm_PageType div.radio input[value=' + defaultChildClass + ']')
+          .find('#Form_AddForm_RecordType div.radio input[value=' + defaultChildClass + ']')
           .parents('li:first');
       } else {
-        var selectedEl = this.find('#Form_AddForm_PageType div.radio:not(.disabled):first');
+        var selectedEl = this.find('#Form_AddForm_RecordType div.radio:not(.disabled):first');
       }
       selectedEl.setSelected(true);
       selectedEl.siblings().setSelected(false);
 
-      // Disable the "Create" button if none of the pagetypes are available
-      if(this.find('#Form_AddForm_PageType div.radio:not(.disabled)').length) {
+      // Disable the "Create" button if none of the record types are available
+      if(this.find('#Form_AddForm_RecordType div.radio:not(.disabled)').length) {
         this.find('button[name=action_doAdd]').removeAttr('disabled');
       } else {
         this.find('button[name=action_doAdd]').attr('disabled', 'disabled');
@@ -172,7 +172,7 @@ $.entwine('ss', function($){
     }
   });
 
-  $(".cms-add-form #Form_AddForm_PageType div.radio").entwine({
+  $(".cms-add-form #Form_AddForm_RecordType div.radio").entwine({
     onclick: function(e) {
       this.setSelected(true);
     },