feat(KAN-20): unify dialogs feedback and protect ticket drafts

resources/js/lib/form-feedback.ts

@@ -0,0 +1,42 @@
+export type FormFeedbackState =
+    | 'idle'
+    | 'loading'
+    | 'success'
+    | 'validation'
+    | 'network'
+    | 'server'
+    | 'cancelled';
+
+export const formRequestHeader = 'X-KanbanGit-Form-Request';
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+    return typeof value === 'object' && value !== null;
+}
+
+/** Match failures to one submission, without intercepting other forms or polling. */
+export function matchesFormRequest(
+    config: unknown,
+    requestId: string | null,
+): boolean {
+    if (!requestId || !isRecord(config) || !isRecord(config.headers)) {
+        return false;
+    }
+
+    return config.headers[formRequestHeader] === requestId;
+}
+
+/** Runtime exceptions and cancellations are not network failures. */
+export function isFormNetworkFailure(
+    error: unknown,
+    requestId: string | null,
+): boolean {
+    return (
+        isRecord(error) &&
+        error.isAxiosError === true &&
+        !error.response &&
+        ['ERR_NETWORK', 'ECONNABORTED', 'ETIMEDOUT'].includes(
+            String(error.code),
+        ) &&
+        matchesFormRequest(error.config, requestId)
+    );
+}