Add liquidDocParam handling to stage2 AST

- Updated the `toLiquidDocAST` function to include handling for `@param` syntax and fallback text node

Author: jamesmengo

packages/liquid-html-parser/src/stage-1-cst.ts

@@ -1306,14 +1306,27 @@ function toLiquidDocAST(source: string, matchingSource: string, offset: number)
 
   const LiquidDocMappings: Mapping = {
     Node: 0,
+    textNode: {
+      type: ConcreteNodeTypes.TextNode,
+      value: function () {
+        return (this as any).sourceString;
+      },
+      locStart,
+      locEnd,
+      source,
+    },
     paramNode: {
       type: ConcreteNodeTypes.LiquidDocParamNode,
+      name: 0,
       locStart,
       locEnd,
       source,
     },
     fallbackNode: {
       type: ConcreteNodeTypes.TextNode,
+      value: function () {
+        return (this as any).sourceString;
+      },
       locStart,
       locEnd,
       source,

packages/liquid-html-parser/src/stage-2-ast.spec.ts

@@ -1229,22 +1229,21 @@ describe('Unit: Stage 2 (AST)', () => {
       expectPath(ast, 'children.0.body.type').toEqual('RawMarkup');
       expectPath(ast, 'children.0.body.nodes').toEqual([]);
 
-      ast = toLiquidAST(`{% doc -%} single line doc {%- enddoc %}`);
+      ast = toLiquidAST(`
+        {% doc -%}
+        @param asdf
+        @unsupported this node falls back to a text node
+        {%- enddoc %}
+      `);
       expectPath(ast, 'children.0.type').to.eql('LiquidRawTag');
       expectPath(ast, 'children.0.name').to.eql('doc');
-      expectPath(ast, 'children.0.body.value').to.eql(' single line doc ');
-      expectPath(ast, 'children.0.body.nodes.0.type').toEqual('TextNode');
+      expectPath(ast, 'children.0.body.nodes.0.type').to.eql('LiquidDocParamNode');
+      expectPath(ast, 'children.0.body.nodes.0.name').to.eql('@param');
 
-      ast = toLiquidAST(`{% doc -%}
-        multi line doc
-        multi line doc
-        {%- enddoc %}`);
-      expectPath(ast, 'children.0.type').to.eql('LiquidRawTag');
-      expectPath(ast, 'children.0.name').to.eql('doc');
-      expectPath(ast, 'children.0.body.nodes.0.value').to.eql(
-        `multi line doc\n        multi line doc`,
+      expectPath(ast, 'children.0.body.nodes.1.type').to.eql('TextNode');
+      expectPath(ast, 'children.0.body.nodes.1.value').to.eql(
+        '@unsupported this node falls back to a text node',
       );
-      expectPath(ast, 'children.0.body.nodes.0.type').toEqual('TextNode');
     });
 
     it('should parse unclosed tables with assignments', () => {

packages/liquid-html-parser/src/stage-2-ast.ts

@@ -73,6 +73,7 @@ import {
   LiquidHtmlConcreteNode,
   ConcreteLiquidTagBaseCase,
   ConcreteLiquidTagContentForMarkup,
+  LiquidDocCST,
 } from './stage-1-cst';
 import { Comparators, NamedTags, NodeTypes, nonTraversableProperties, Position } from './types';
 import { assertNever, deepGet, dropLast } from './utils';
@@ -107,7 +108,8 @@ export type LiquidHtmlNode =
   | RenderVariableExpression
   | LiquidLogicalExpression
   | LiquidComparison
-  | TextNode;
+  | TextNode
+  | LiquidDocParamNode;
 
 /** The root node of all LiquidHTML ASTs. */
 export interface DocumentNode extends ASTNode<NodeTypes.Document> {
@@ -754,6 +756,10 @@ export interface TextNode extends ASTNode<NodeTypes.TextNode> {
   value: string;
 }
 
+export interface LiquidDocParamNode extends ASTNode<NodeTypes.LiquidDocParamNode> {
+  name: string;
+}
+
 export interface ASTNode<T> {
   /**
    * The type of the node, as a string.
@@ -1103,7 +1109,7 @@ export function cstToAst(
 }
 
 function buildAst(
-  cst: LiquidHtmlCST | LiquidCST | ConcreteAttributeNode[],
+  cst: LiquidHtmlCST | LiquidCST | LiquidDocCST | ConcreteAttributeNode[],
   options: ASTBuildOptions,
 ) {
   const builder = new ASTBuilder(cst[0].source);
@@ -1268,6 +1274,16 @@ function buildAst(
         break;
       }
 
+      case ConcreteNodeTypes.LiquidDocParamNode: {
+        builder.push({
+          type: NodeTypes.LiquidDocParamNode,
+          name: node.name,
+          position: position(node),
+          source: node.source,
+        });
+        break;
+      }
+
       default: {
         assertNever(node);
       }

packages/liquid-html-parser/src/types.ts

@@ -44,6 +44,7 @@ export enum NodeTypes {
   RawMarkup = 'RawMarkup',
   RenderMarkup = 'RenderMarkup',
   RenderVariableExpression = 'RenderVariableExpression',
+  LiquidDocParamNode = 'LiquidDocParamNode',
 }
 
 // These are officially supported with special node types