[Init] Initial commit - NetMesh terminal manager

application/state/terminalAutoReconnect.ts

@@ -0,0 +1,66 @@
+import type { TerminalSettings } from "../../domain/models";
+import type { TerminalSessionExitEvent } from "./resolveTerminalSessionExitIntent";
+
+export const TERMINAL_AUTO_RECONNECT_DELAY_MS = 5000;
+
+type AutoReconnectHost = {
+  protocol?: "ssh" | "telnet" | "local" | "serial" | "mosh" | "et";
+  hostname?: string;
+  moshEnabled?: boolean;
+  etEnabled?: boolean;
+};
+
+type AutoReconnectSettings = Pick<TerminalSettings, "sshAutoReconnectEnabled"> | undefined | null;
+
+export function isTerminalAutoReconnectEnabled(settings: AutoReconnectSettings): boolean {
+  return settings?.sshAutoReconnectEnabled === true;
+}
+
+export function isAutoReconnectableSshHost(host: AutoReconnectHost): boolean {
+  const protocol = host.protocol ?? "ssh";
+  return (
+    protocol === "ssh" &&
+    host.hostname !== "localhost" &&
+    host.moshEnabled !== true &&
+    host.etEnabled !== true
+  );
+}
+
+export function shouldAutoReconnectAfterExit({
+  evt,
+  host,
+  terminalSettings,
+  hasEverConnected,
+}: {
+  evt: TerminalSessionExitEvent;
+  host: AutoReconnectHost;
+  terminalSettings?: AutoReconnectSettings;
+  hasEverConnected: boolean;
+}): boolean {
+  if (!hasEverConnected) return false;
+  if (!isTerminalAutoReconnectEnabled(terminalSettings)) return false;
+  if (!isAutoReconnectableSshHost(host)) return false;
+  return evt.reason !== "exited";
+}
+
+export function shouldContinueAutoReconnectAfterFailure({
+  host,
+  terminalSettings,
+  loopActive,
+}: {
+  host: AutoReconnectHost;
+  terminalSettings?: AutoReconnectSettings;
+  loopActive: boolean;
+}): boolean {
+  return loopActive && isTerminalAutoReconnectEnabled(terminalSettings) && isAutoReconnectableSshHost(host);
+}
+
+export function canAttemptTerminalAutoReconnect({
+  hasTerminalRuntime,
+  isHibernated,
+}: {
+  hasTerminalRuntime: boolean;
+  isHibernated: boolean;
+}): boolean {
+  return hasTerminalRuntime || isHibernated;
+}