Revert "Migrating the admin_definition.jsx file to typescript (#24658)" (#24869)

This reverts commit a1bf8504a8.

webapp/channels/src/components/admin_console/admin_console.tsx

@@ -4,8 +4,8 @@
 import React from 'react';
 import {Route, Switch, Redirect} from 'react-router-dom';
 
-import type {CloudState} from '@mattermost/types/cloud';
-import type {AdminConfig, EnvironmentConfig} from '@mattermost/types/config';
+import type {CloudState, Product} from '@mattermost/types/cloud';
+import type {AdminConfig, EnvironmentConfig, ClientLicense} from '@mattermost/types/config';
 import type {Role} from '@mattermost/types/roles';
 import type {DeepPartial} from '@mattermost/types/utilities';
 
@@ -26,7 +26,6 @@ import {LhsItemType} from 'types/store/lhs';
 
 import AdminSidebar from './admin_sidebar';
 import Highlight from './highlight';
-import type {AdminDefinitionSubSection, AdminDefinitionSection} from './types';
 
 import type {PropsFromRedux} from './index';
 
@@ -53,6 +52,22 @@ type ExtraProps = {
     isCurrentUserSystemAdmin: boolean;
 }
 
+type ConsoleAccess = {
+    read: Record<string, boolean>;
+    write: Record<string, boolean>;
+}
+
+type Item = {
+    isHidden?: (config?: Record<string, any>, state?: Record<string, any>, license?: Record<string, any>, buildEnterpriseReady?: boolean, consoleAccess?: ConsoleAccess, cloud?: CloudState, isCurrentUserSystemAdmin?: boolean) => boolean;
+    isDisabled?: (config?: Record<string, any>, state?: Record<string, any>, license?: Record<string, any>, buildEnterpriseReady?: boolean, consoleAccess?: ConsoleAccess, cloud?: CloudState, isCurrentUserSystemAdmin?: boolean) => boolean;
+    schema: Record<string, any>;
+    url: string;
+    restrictedIndicator?: {
+        value: (cloud: CloudState) => React.ReactNode;
+        shouldDisplay: (license: ClientLicense, subscriptionProduct?: Product) => boolean;
+    };
+}
+
 export default class AdminConsole extends React.PureComponent<Props, State> {
     public constructor(props: Props) {
         super(props);
@@ -101,22 +116,30 @@ export default class AdminConsole extends React.PureComponent<Props, State> {
     private renderRoutes = (extraProps: ExtraProps) => {
         const {adminDefinition, config, license, buildEnterpriseReady, consoleAccess, cloud, isCurrentUserSystemAdmin} = this.props;
 
-        const schemas: AdminDefinitionSubSection[] = Object.values(adminDefinition).flatMap((section: AdminDefinitionSection) => {
+        const schemas: Item[] = Object.values(adminDefinition).reduce((acc, section) => {
+            let items: Item[] = [];
+
             let isSectionHidden = false;
-            if (typeof section.isHidden === 'function') {
-                isSectionHidden = section.isHidden(config, this.state, license, buildEnterpriseReady, consoleAccess, cloud, isCurrentUserSystemAdmin);
-            } else {
-                isSectionHidden = Boolean(section.isHidden);
+            Object.entries(section).find(([key, value]) => {
+                if (key === 'isHidden') {
+                    if (typeof value === 'function') {
+                        isSectionHidden = value(config, this.state, license, buildEnterpriseReady, consoleAccess, cloud, isCurrentUserSystemAdmin);
+                    } else {
+                        isSectionHidden = Boolean(value);
+                    }
+                }
+                return null;
+            });
+
+            if (!isSectionHidden) {
+                items = Object.values(section).filter((item: Item) => Boolean(item.schema));
             }
-            if (isSectionHidden) {
-                return [];
-            }
-            return Object.values(section.subsections);
-        });
+            return acc.concat(items);
+        }, [] as Item[]);
 
         let defaultUrl = '';
 
-        const schemaRoutes = schemas.map((item: AdminDefinitionSubSection, index: number) => {
+        const schemaRoutes = schemas.map((item: Item, index: number) => {
             if (typeof item.isHidden !== 'undefined') {
                 const isHidden = (typeof item.isHidden === 'function') ? item.isHidden(config, this.state, license, buildEnterpriseReady, consoleAccess, cloud, isCurrentUserSystemAdmin) : Boolean(item.isHidden);
                 if (isHidden) {