Summarize into new chat suggested action (#34)

src/ipc/utils/token_utils.ts

@@ -0,0 +1,35 @@
+import { readSettings } from "../../main/settings";
+import { Message } from "../ipc_types";
+import { MODEL_OPTIONS } from "../../constants/models";
+import log from "electron-log";
+
+const logger = log.scope("token_utils");
+
+// Estimate tokens (4 characters per token)
+export const estimateTokens = (text: string): number => {
+  return Math.ceil(text.length / 4);
+};
+
+export const estimateMessagesTokens = (messages: Message[]): number => {
+  return messages.reduce(
+    (acc, message) => acc + estimateTokens(message.content),
+    0
+  );
+};
+
+const DEFAULT_CONTEXT_WINDOW = 128_000;
+
+export function getContextWindow() {
+  const settings = readSettings();
+  const model = settings.selectedModel;
+  if (!MODEL_OPTIONS[model.provider as keyof typeof MODEL_OPTIONS]) {
+    logger.warn(
+      `Model provider ${model.provider} not found in MODEL_OPTIONS. Using default max tokens.`
+    );
+    return DEFAULT_CONTEXT_WINDOW;
+  }
+  const modelOption = MODEL_OPTIONS[
+    model.provider as keyof typeof MODEL_OPTIONS
+  ].find((m) => m.name === model.name);
+  return modelOption?.contextWindow || DEFAULT_CONTEXT_WINDOW;
+}