feat: call arbitrary method on node + added :parent selector

1 files changed, 13 insertions, 0 deletions

diff --git a/src/eval.ts b/src/eval.ts
index 445cb8f..aba31df 100644
--- a/src/eval.ts
+++ b/src/eval.ts
@@ -31,6 +31,11 @@ export interface EvalActions {
   }): Promise<void>
   addChildren(id: string, children: Expr[]): Promise<void>
   removeElement(id: string | undefined): Promise<void>
+  callMethod(
+    id: string | undefined,
+    method: string,
+    args: EvalValue[],
+  ): Promise<void>
   // calculate ??
 }
 
@@ -154,6 +159,14 @@ const getFunctions = (name: string, args: Expr[], actions: EvalActions) => {
       actions.removeElement(
         (args[0] && (await evalExpr(args[0], actions))) ?? undefined,
       ),
+    call: async () => {
+      const [id, method, ...methodArgs] = await Promise.all(
+        args.map(a => evalExpr(a, actions)),
+      )
+      if (id && method) {
+        actions.callMethod(id, method, methodArgs)
+      }
+    },
 
     _: () => Promise.reject(new Error('not supposed to be here')),
   })