apps/desktop/src/main/create-session-input.ts

/**
 * What a `sessions:create` request resolves to.
 *
 * #1433: these fields used to be derived in two places. `sessions:create`
 * took them from the renderer, and a second IPC (`quickChat:start`, built for
 * the first-run Quick Chat panel) derived them from a product `mode`. The
 * panel is gone, and what remained of the second IPC was a duplicate of the
 * first — same readiness gate, same connection resolution, same
 * `emitSessionsChanged('created')` — so only the derivation survived.
 *
 * It lives here as a pure function rather than inside the handler because the
 * handler is an `ipcMain.handle` closure no test can call. Every invariant
 * below — the mode's boundary outranking both the renderer's request and the
 * configured default, the refusal of a directly-requested `explore`, the
 * settings-backed fallback that must never reject — would otherwise only be
 * assertable by regex over the handler's source.
 */

import type {
  AppSettings,
  CollaborationMode,
  OrchestrationMode,
  PermissionMode,
  SessionStartMode,
} from '@maka/core';
import {
  DEFAULT_SESSION_NAME,
  isChatDefaultPermissionMode,
  isCollaborationMode,
  isOrchestrationMode,
  isSessionStartMode,
  sessionStartModeSpec,
} from '@maka/core';

import { resolveDefaultPermissionMode } from './permission-mode-default.js';

/**
 * `unknown`, because this is an IPC boundary and the renderer's type is a
 * promise, not a guarantee. An unrecognized value confers nothing — it is not
 * a mode — and the caller falls through to an ordinary session, which is the
 * same session it would have got by not naming one.
 */
export interface CreateSessionRequest {
  mode?: SessionStartMode;
  permissionMode?: PermissionMode;
  collaborationMode?: CollaborationMode;
  orchestrationMode?: OrchestrationMode;
  name?: string;
  labels?: string[];
}

export interface ResolvedCreateSessionInput {
  permissionMode: PermissionMode;
  collaborationMode: CollaborationMode;
  orchestrationMode: OrchestrationMode;
  name: string;
  labels: string[] | undefined;
}

export interface ResolvedCreateSessionRequest
  extends Omit<ResolvedCreateSessionInput, 'permissionMode'> {
  mode?: SessionStartMode;
  permissionMode?: PermissionMode;
}

export function resolveCreateSessionRequest(
  input: CreateSessionRequest | undefined,
): ResolvedCreateSessionRequest {
  const collaborationMode = input?.collaborationMode ?? 'agent';
  if (!isCollaborationMode(collaborationMode)) {
    throw new TypeError('Invalid collaboration mode.');
  }
  const orchestrationMode = input?.orchestrationMode ?? 'default';
  if (!isOrchestrationMode(orchestrationMode)) {
    throw new TypeError('Invalid orchestration mode.');
  }
  // `explore` is a boundary a product mode confers, not one a caller may
  // request directly. Existing Sessions use a separate deliberate mutation.
  if (input?.permissionMode !== undefined && !isChatDefaultPermissionMode(input.permissionMode)) {
    throw new TypeError('Invalid permission mode.');
  }

  return {
    ...(isSessionStartMode(input?.mode) ? { mode: input.mode } : {}),
    ...(input?.permissionMode === undefined ? {} : { permissionMode: input.permissionMode }),
    collaborationMode,
    orchestrationMode,
    name: input?.name ?? DEFAULT_SESSION_NAME,
    labels: input?.labels,
  };
}

export async function resolveCreateSessionInput(
  input: CreateSessionRequest | undefined,
  deps: { readSettings: () => Promise<AppSettings> },
): Promise<ResolvedCreateSessionInput> {
  const request = resolveCreateSessionRequest(input);
  const mode = request.mode === undefined ? undefined : sessionStartModeSpec(request.mode);
  return {
    collaborationMode: request.collaborationMode,
    orchestrationMode: request.orchestrationMode,
    name: mode?.name ?? request.name,
    labels:
      mode === undefined
        ? request.labels
        : [...new Set([...(request.labels ?? []), ...mode.labels])],
    permissionMode:
      mode?.permissionMode ??
      request.permissionMode ??
      (await resolveDefaultPermissionMode(deps.readSettings)),
  };
}