refactor: remove unused runAgentService and consolidate chat model functions

src/shared/chat-model.ts

@@ -1 +1,112 @@
+import type { RawMessage } from '../../runtime-shared/shared/chat-model';
+
 export * from '../../runtime-shared/shared/chat-model';
+
+export function extractText(message?: RawMessage | null): string {
+  if (!message) return '';
+
+  if (typeof message.content === 'string') {
+    return message.content;
+  }
+
+  return message.content
+    .filter((block) => block.type === 'text' && typeof block.text === 'string')
+    .map((block) => block.text ?? '')
+    .join('\n');
+}
+
+export function extractThinking(message?: RawMessage | null): string | null {
+  if (!message || !Array.isArray(message.content)) return null;
+
+  const thinkingBlock = message.content.find((block) => block.type === 'thinking');
+  return thinkingBlock?.thinking ?? null;
+}
+
+export function extractImages(message?: RawMessage | null): Array<{ url?: string; data?: string; mimeType: string }> {
+  if (!message || !Array.isArray(message.content)) return [];
+
+  const images: Array<{ url?: string; data?: string; mimeType: string }> = [];
+
+  for (const block of message.content) {
+    if (block.type === 'image') {
+      if (block.source?.type === 'base64' && block.source.data) {
+        images.push({
+          data: block.source.data,
+          mimeType: block.source.media_type || 'image/jpeg',
+        });
+      } else if (block.source?.type === 'url' && block.source.url) {
+        images.push({
+          url: block.source.url,
+          mimeType: block.source.media_type || 'image/jpeg',
+        });
+      } else if (block.data) {
+        images.push({
+          data: block.data,
+          mimeType: block.mimeType || 'image/jpeg',
+        });
+      }
+    }
+
+    if ((block.type === 'tool_result' || block.type === 'toolResult') && Array.isArray(block.content)) {
+      images.push(...extractImages({ role: 'toolresult', content: block.content }));
+    }
+  }
+
+  return images;
+}
+
+export function extractToolUse(message?: RawMessage | null): Array<{ id?: string; name: string; input?: unknown }> {
+  if (!message || !Array.isArray(message.content)) return [];
+
+  return message.content
+    .filter((block) => block.type === 'tool_use' || block.type === 'toolCall')
+    .map((block) => ({
+      id: block.id,
+      name: block.name || block.id || 'tool',
+      input: block.input ?? block.arguments,
+    }));
+}
+
+export function formatTimestamp(ts?: number): string {
+  if (!ts) return '';
+
+  const ms = ts < 1e12 ? ts * 1000 : ts;
+  return new Date(ms).toLocaleString();
+}
+
+export function isToolResultRole(role?: string): boolean {
+  if (!role) return false;
+
+  const normalized = role.toLowerCase();
+  return normalized === 'toolresult' || normalized === 'tool_result';
+}
+
+export function isToolOnlyMessage(message?: RawMessage): boolean {
+  if (!message) return false;
+  if (isToolResultRole(message.role)) return true;
+  if (!Array.isArray(message.content)) return false;
+
+  const hasToolBlock = message.content.some((block) =>
+    ['tool_use', 'tool_result', 'toolCall', 'toolResult'].includes(block.type),
+  );
+  const hasTextBlock = message.content.some((block) => block.type === 'text' && block.text?.trim());
+  const hasImageBlock = message.content.some((block) => block.type === 'image');
+
+  return hasToolBlock && !hasTextBlock && !hasImageBlock;
+}
+
+export function isInternalMessage(message: { role?: string; content?: unknown }): boolean {
+  if (message.role === 'system') return true;
+
+  if (message.role === 'assistant') {
+    const text = typeof message.content === 'string'
+      ? message.content
+      : extractText(message as RawMessage);
+
+    if (/^(HEARTBEAT_OK|NO_REPLY)\s*$/.test(text)) {
+      return true;
+    }
+  }
+
+  return false;
+}