legacy extension compatibility layer

scripts/index.ts

@@ -29,6 +29,7 @@ import {httpRequestJsonLocal} from 'core/helpers/network';
 import {store} from 'core/data';
 import {registerGlobalKeybindings} from 'core/keyboard/keyboard';
 import {maybeDisplayInvalidInstanceConfigurationMessage} from 'validate-instance-configuration';
+import {registerLegacyExtensionCompatibilityLayer} from 'register-legacy-extension-compatibility-layer';
 
 let body = angular.element('body');
 
@@ -152,6 +153,8 @@ export function startApp(
                             registerAuthoringReactWidgets();
                             registerAuthoringReactFields();
                         }
+
+                        registerLegacyExtensionCompatibilityLayer();
                     });
                 });
             },

scripts/register-legacy-extension-compatibility-layer.tsx

@@ -0,0 +1,33 @@
+import React from 'react';
+import {IExtensionActivationResult} from 'superdesk-api';
+import {registerInternalExtension} from 'core/helpers/register-internal-extension';
+import ng from 'core/services/ng';
+
+interface ILegacyExtensionPoint {
+    type: string;
+    componentClass: React.ComponentType<any>;
+    data: unknown;
+    onInit: unknown;
+    props: {[key: string]: unknown};
+}
+
+export function registerLegacyExtensionCompatibilityLayer() {
+    const extensionActivationResult: IExtensionActivationResult = {
+        contributions: {
+            publishingSections: (ng.get('extensionPoints').get('authoring:publish') as Array<ILegacyExtensionPoint>)
+                .map((api) => {
+                    const Component = api.componentClass;
+
+                    return {
+                        component: function LegacyExtensionCompatibilityLayerComponentWrapper(props) {
+                            return (
+                                <Component {...api.props} item={props.item} />
+                            );
+                        },
+                    };
+                }),
+        },
+    };
+
+    registerInternalExtension('extensionCompatibilityLayer', extensionActivationResult);
+}