refactor(tui): split handlers

src/tui/tui-formatters.ts

@@ -0,0 +1,89 @@
+import { formatTokenCount } from "../utils/usage-format.js";
+
+export function resolveFinalAssistantText(params: {
+  finalText?: string | null;
+  streamedText?: string | null;
+}) {
+  const finalText = params.finalText ?? "";
+  if (finalText.trim()) return finalText;
+  const streamedText = params.streamedText ?? "";
+  if (streamedText.trim()) return streamedText;
+  return "(no output)";
+}
+
+function extractTextBlocks(
+  content: unknown,
+  opts?: { includeThinking?: boolean },
+): string {
+  if (typeof content === "string") return content.trim();
+  if (!Array.isArray(content)) return "";
+  const parts: string[] = [];
+  for (const block of content) {
+    if (!block || typeof block !== "object") continue;
+    const record = block as Record<string, unknown>;
+    if (record.type === "text" && typeof record.text === "string") {
+      parts.push(record.text);
+    }
+    if (
+      opts?.includeThinking &&
+      record.type === "thinking" &&
+      typeof record.thinking === "string"
+    ) {
+      parts.push(`[thinking]\n${record.thinking}`);
+    }
+  }
+  return parts.join("\n").trim();
+}
+
+export function extractTextFromMessage(
+  message: unknown,
+  opts?: { includeThinking?: boolean },
+): string {
+  if (!message || typeof message !== "object") return "";
+  const record = message as Record<string, unknown>;
+  return extractTextBlocks(record.content, opts);
+}
+
+export function formatTokens(total?: number | null, context?: number | null) {
+  if (total == null && context == null) return "tokens ?";
+  const totalLabel = total == null ? "?" : formatTokenCount(total);
+  if (context == null) return `tokens ${totalLabel}`;
+  const pct =
+    typeof total === "number" && context > 0
+      ? Math.min(999, Math.round((total / context) * 100))
+      : null;
+  return `tokens ${totalLabel}/${formatTokenCount(context)}${
+    pct !== null ? ` (${pct}%)` : ""
+  }`;
+}
+
+export function formatContextUsageLine(params: {
+  total?: number | null;
+  context?: number | null;
+  remaining?: number | null;
+  percent?: number | null;
+}) {
+  const totalLabel =
+    typeof params.total === "number" ? formatTokenCount(params.total) : "?";
+  const ctxLabel =
+    typeof params.context === "number" ? formatTokenCount(params.context) : "?";
+  const pct =
+    typeof params.percent === "number"
+      ? Math.min(999, Math.round(params.percent))
+      : null;
+  const remainingLabel =
+    typeof params.remaining === "number"
+      ? `${formatTokenCount(params.remaining)} left`
+      : null;
+  const pctLabel = pct !== null ? `${pct}%` : null;
+  const extra = [remainingLabel, pctLabel].filter(Boolean).join(", ");
+  return `tokens ${totalLabel}/${ctxLabel}${extra ? ` (${extra})` : ""}`;
+}
+
+export function asString(value: unknown, fallback = ""): string {
+  if (typeof value === "string") return value;
+  if (typeof value === "number" || typeof value === "boolean") {
+    return String(value);
+  }
+  return fallback;
+}