推进 OPFS G-code 程序路径 helper

wasm-port/runtime/opfs/machine-file-store.js

@@ -3,9 +3,12 @@ import {
   gcodeProgramPath,
   machineIniPath,
   parameterFilePath,
+  splitOpfsPath,
   toolTablePath,
 } from "./path-model.js";
 
+const GCODE_PROGRAM_ROOT = ["linuxcnc", "gcode"];
+
 const MACHINE_FILE_PATHS = {
   ini: machineIniPath,
   toolTable: toolTablePath,
@@ -43,6 +46,18 @@ export async function loadMachineTextFiles(machineId, options = {}) {
   };
 }
 
+export function gcodeFilenameFromProgramPath(path) {
+  const parts = splitOpfsPath(path);
+  if (
+    parts.length !== 3 ||
+    parts[0] !== GCODE_PROGRAM_ROOT[0] ||
+    parts[1] !== GCODE_PROGRAM_ROOT[1]
+  ) {
+    throw new Error(`Invalid G-code program OPFS path: ${path}`);
+  }
+  return parts[2];
+}
+
 export async function saveGcodeProgram(filename, text, options = {}) {
   const path = gcodeProgramPath(filename);
   await saveTextFile(path, text, options.storage);