add component state, top-level await support (#26)

1 files changed, 61 insertions, 0 deletions

diff --git a/src/parser/parse/read/script.ts b/src/parser/parse/read/script.ts
new file mode 100644
index 000000000..7afbfb08f
--- /dev/null
+++ b/src/parser/parse/read/script.ts
@@ -0,0 +1,61 @@
+// @ts-nocheck
+
+import * as acorn from '../acorn';
+import { Parser } from '../index.js';
+import { Script } from '../../interfaces.js';
+import { Node, Program } from 'estree';
+
+const script_closing_tag = '</script>';
+
+function get_context(parser: Parser, attributes: any[], start: number): 'runtime' | 'setup' {
+  const context = attributes.find((attribute) => attribute.name === 'astro');
+  if (!context) return 'runtime';
+  if (context.value === true) return 'setup';
+
+  if (context.value.length !== 1 || context.value[0].type !== 'Text') {
+    parser.error(
+      {
+        code: 'invalid-script',
+        message: 'astro attribute must be static',
+      },
+      start
+    );
+  }
+
+  const value = context.value[0].data;
+
+  if (value !== 'setup') {
+    parser.error(
+      {
+        code: 'invalid-script',
+        message: 'If the "astro" attribute has a value, its value must be "setup"',
+      },
+      context.start
+    );
+  }
+
+  return value;
+}
+
+export default function read_script(parser: Parser, start: number, attributes: Node[]): Script {
+  const script_start = parser.index;
+  const script_end = parser.template.indexOf(script_closing_tag, script_start);
+
+  if (script_end === -1) {
+    parser.error({
+      code: 'unclosed-script',
+      message: '<script> must have a closing tag',
+    });
+  }
+
+  const source = parser.template.slice(0, script_start).replace(/[^\n]/g, ' ') + parser.template.slice(script_start, script_end);
+  parser.index = script_end + script_closing_tag.length;
+
+  return {
+    type: 'Script',
+    start,
+    end: parser.index,
+    context: get_context(parser, attributes, start),
+    content: source,
+  };
+}