Add a selectBulkImportDialogExportContent

Part of #688.

src/contenteditable.ts

@@ -9,7 +9,8 @@ import {
 
 import {
 	HTMLTagMap,
-	HTMLTagName
+	HTMLTagName,
+	ProcessedCard
 } from './types.js';
 
 import {
@@ -464,4 +465,9 @@ export const importBodiesFromGoogleDocs = (content : string, mode : 'bulleted' |
 		result.push(body);
 	}
 	return result;
+};
+
+export const exportContentForCards = (cards : ProcessedCard[]) : string => {
+	//TODO: convert markup.
+	return cards.map(card => card.body).join('\n');
 };

src/selectors.ts

@@ -160,10 +160,17 @@ import {
 	Filters
 } from './types.js';
 
+import {
+	exportContentForCards
+} from './contenteditable.js';
+
 import {
 	TypedObject
 } from './typed_object.js';
-import { Timestamp } from 'firebase/firestore';
+
+import {
+	Timestamp
+} from 'firebase/firestore';
 
 const selectState = (state : State) : State => state;
 
@@ -1812,4 +1819,14 @@ export const selectMultiEditCardDiff = createSelector(
 		if (todoDisablements.length) result.auto_todo_overrides_disablements = todoDisablements;
 		return result;
 	}
+);
+
+export const selectBulkImportDialogExportContent = createSelector(
+	selectBulkImportDialogOpen,
+	selectBulKimportDialogMode,
+	selectActiveCollectionCards,
+	(open, mode, cards) => {
+		if (!open || mode != 'export') return '';
+		return exportContentForCards(cards);
+	}
 );