refactor(queue): share runtime settings and summary helpers

src/utils/queue-helpers.ts

@@ -11,6 +11,53 @@ export type QueueState<T> = QueueSummaryState & {
   cap: number;
 };
 
+export function clearQueueSummaryState(state: QueueSummaryState): void {
+  state.droppedCount = 0;
+  state.summaryLines = [];
+}
+
+export function previewQueueSummaryPrompt(params: {
+  state: QueueSummaryState;
+  noun: string;
+  title?: string;
+}): string | undefined {
+  return buildQueueSummaryPrompt({
+    state: {
+      dropPolicy: params.state.dropPolicy,
+      droppedCount: params.state.droppedCount,
+      summaryLines: [...params.state.summaryLines],
+    },
+    noun: params.noun,
+    title: params.title,
+  });
+}
+
+export function applyQueueRuntimeSettings<TMode extends string>(params: {
+  target: {
+    mode: TMode;
+    debounceMs: number;
+    cap: number;
+    dropPolicy: QueueDropPolicy;
+  };
+  settings: {
+    mode: TMode;
+    debounceMs?: number;
+    cap?: number;
+    dropPolicy?: QueueDropPolicy;
+  };
+}): void {
+  params.target.mode = params.settings.mode;
+  params.target.debounceMs =
+    typeof params.settings.debounceMs === "number"
+      ? Math.max(0, params.settings.debounceMs)
+      : params.target.debounceMs;
+  params.target.cap =
+    typeof params.settings.cap === "number" && params.settings.cap > 0
+      ? Math.floor(params.settings.cap)
+      : params.target.cap;
+  params.target.dropPolicy = params.settings.dropPolicy ?? params.target.dropPolicy;
+}
+
 export function elideQueueText(text: string, limit = 140): string {
   if (text.length <= limit) {
     return text;
@@ -101,8 +148,7 @@ export function buildQueueSummaryPrompt(params: {
       lines.push(`- ${line}`);
     }
   }
-  params.state.droppedCount = 0;
-  params.state.summaryLines = [];
+  clearQueueSummaryState(params.state);
   return lines.join("\n");
 }