Extract MFM types

src/mfm/types.ts

@@ -0,0 +1,37 @@
+import { Tree } from '../prelude/tree';
+import * as T from '../prelude/tree';
+
+type Node<T, P> = { type: T, props: P };
+
+export type MentionNode = Node<'mention', {
+	canonical: string,
+	username: string,
+	host: string,
+	acct: string
+}>;
+
+export type HashtagNode = Node<'hashtag', {
+	hashtag: string
+}>;
+
+export type EmojiNode = Node<'emoji', {
+	name: string
+}>;
+
+export type MfmNode =
+	MentionNode |
+	HashtagNode |
+	EmojiNode |
+	Node<string, any>;
+
+export type MfmTree = Tree<MfmNode>;
+
+export type MfmForest = MfmTree[];
+
+export function createLeaf(type: string, props: any): MfmTree {
+	return T.createLeaf({ type, props });
+}
+
+export function createTree(type: string, children: MfmForest, props: any): MfmTree {
+	return T.createTree({ type, props }, children);
+}