update cdl/def diagnostic

client/src/common/handlers.ts

@@ -35,6 +35,32 @@ export function formatDefFile(content: string): string {
     }
     return formattedLines.join("\n")
 }
+
+export function isFirstLineMachine(content: string): boolean {
+    const firstLine = content.split("\n")[0].trim()
+    const machineRegex = /^MACHINE\s+\S+/
+    return machineRegex.test(firstLine)
+}
+
+export function diagnosticHandler(document: vscode.TextDocument) {
+    if (document.languageId === "cdl" || document.languageId === "def") {
+        const diagnostics: vscode.Diagnostic[] = []
+        if (!isFirstLineMachine(document.getText())) {
+            const range = new vscode.Range(
+                document.positionAt(0),
+                document.positionAt(document.getText().length)
+            )
+            const diagnostic = new vscode.Diagnostic(
+                range,
+                "The first line of the CDL file should contain 'MACHINE'.",
+                vscode.DiagnosticSeverity.Error
+            )
+            diagnostics.push(diagnostic)
+        }
+        return diagnostics
+    }
+}
+
 export function completionHandlerCdl(document: vscode.TextDocument, position: vscode.Position) {
     const linePrefix = document.lineAt(position).text.substring(0, position.character)
     const categories = ["MILL", "LATHE", "DRILL"]