Makelore 2.0 initial clean snapshot

electron/opencode/project-template-snapshot.ts

@@ -0,0 +1,67 @@
+import { mkdir, readFile, writeFile } from 'node:fs/promises';
+import { dirname, join } from 'node:path';
+import {
+  validateProjectTemplateSnapshot,
+  type ProjectTemplateSnapshot,
+} from '../../shared/project-template';
+
+export const PROJECT_TEMPLATE_SNAPSHOT_PATH = '.niancode/project-template.json';
+
+export type ProjectTemplateSnapshotReadResult =
+  | { status: 'missing' }
+  | { status: 'valid'; snapshot: ProjectTemplateSnapshot }
+  | { status: 'invalid'; error: string };
+
+export function getProjectTemplateSnapshotPath(projectPath: string): string {
+  return join(projectPath, '.niancode', 'project-template.json');
+}
+
+export async function readProjectTemplateSnapshot(projectPath: string): Promise<ProjectTemplateSnapshotReadResult> {
+  const snapshotPath = getProjectTemplateSnapshotPath(projectPath);
+  let raw: string;
+  try {
+    raw = await readFile(snapshotPath, 'utf8');
+  } catch (error) {
+    if ((error as NodeJS.ErrnoException).code === 'ENOENT') {
+      return { status: 'missing' };
+    }
+    return { status: 'invalid', error: `${PROJECT_TEMPLATE_SNAPSHOT_PATH}: ${String(error)}` };
+  }
+
+  let parsed: unknown;
+  try {
+    parsed = JSON.parse(raw);
+  } catch (error) {
+    return { status: 'invalid', error: `${PROJECT_TEMPLATE_SNAPSHOT_PATH}: invalid JSON (${String(error)})` };
+  }
+
+  const validation = validateProjectTemplateSnapshot(parsed);
+  if (!validation.ok) {
+    return { status: 'invalid', error: `${PROJECT_TEMPLATE_SNAPSHOT_PATH}: ${validation.error}` };
+  }
+  return { status: 'valid', snapshot: validation.snapshot };
+}
+
+export async function writeProjectTemplateSnapshot(
+  projectPath: string,
+  snapshot: ProjectTemplateSnapshot,
+): Promise<ProjectTemplateSnapshot> {
+  const validation = validateProjectTemplateSnapshot(snapshot);
+  if (!validation.ok) {
+    throw new Error(validation.error);
+  }
+  const snapshotPath = getProjectTemplateSnapshotPath(projectPath);
+  await mkdir(dirname(snapshotPath), { recursive: true });
+  try {
+    await writeFile(snapshotPath, `${JSON.stringify(validation.snapshot, null, 2)}\n`, {
+      encoding: 'utf8',
+      flag: 'wx',
+    });
+  } catch (error) {
+    if ((error as NodeJS.ErrnoException).code === 'EEXIST') {
+      throw new Error(`${PROJECT_TEMPLATE_SNAPSHOT_PATH} already exists and cannot be replaced`, { cause: error });
+    }
+    throw error;
+  }
+  return validation.snapshot;
+}