feat: add util package for generating search indices (#8571)

packages/api-extractor-utils/src/tsdoc/index.ts

@@ -0,0 +1,63 @@
+import type { ApiModel, ApiItem } from '@microsoft/api-extractor-model';
+import {
+	type DocNode,
+	type DocPlainText,
+	type DocLinkTag,
+	type DocParagraph,
+	type DocFencedCode,
+	DocNodeKind,
+	type DocBlock,
+	type DocComment,
+	type DocCodeSpan,
+	type DocParamBlock,
+} from '@microsoft/tsdoc';
+import { block } from './CommentBlock';
+import { codeSpan } from './CommentCodeSpan';
+import type { AnyDocNodeJSON } from './CommentNode';
+import { node as _node } from './CommentNode';
+import { nodeContainer } from './CommentNodeContainer';
+import { fencedCode } from './FencedCodeCommentNode';
+import { linkTagNode } from './LinkTagCommentNode';
+import { paramBlock } from './ParamBlock';
+import { plainTextNode } from './PlainTextCommentNode';
+import { comment } from './RootComment';
+
+export function createCommentNode(
+	node: DocNode,
+	model: ApiModel,
+	version: string,
+	parentItem?: ApiItem,
+): AnyDocNodeJSON {
+	switch (node.kind) {
+		case DocNodeKind.PlainText:
+			return plainTextNode(node as DocPlainText);
+		case DocNodeKind.LinkTag:
+			return linkTagNode(node as DocLinkTag, model, version, parentItem);
+		case DocNodeKind.Paragraph:
+		case DocNodeKind.Section:
+			return nodeContainer(node as DocParagraph, model, version, parentItem);
+		case DocNodeKind.FencedCode:
+			return fencedCode(node as DocFencedCode);
+		case DocNodeKind.CodeSpan:
+			return codeSpan(node as DocCodeSpan);
+		case DocNodeKind.Block:
+			return block(node as DocBlock, model, version, parentItem);
+		case DocNodeKind.ParamBlock:
+			return paramBlock(node as DocParamBlock, model, version, parentItem);
+		case DocNodeKind.Comment:
+			return comment(node as DocComment, model, version, parentItem);
+		default:
+			return _node(node);
+	}
+}
+
+export * from './CommentNode';
+export * from './CommentNodeContainer';
+export * from './CommentBlock';
+export * from './CommentBlockTag';
+export * from './CommentCodeSpan';
+export * from './FencedCodeCommentNode';
+export * from './LinkTagCommentNode';
+export * from './ParamBlock';
+export * from './PlainTextCommentNode';
+export * from './RootComment';