feat: 支持自定义订阅节点并兼容现有数据库

lib/custom-proxy.ts

@@ -0,0 +1,67 @@
+import { parseDocument, stringify } from "yaml";
+
+export class CustomProxyValidationError extends Error {}
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return Boolean(value) && typeof value === "object" && !Array.isArray(value);
+}
+
+/** Accept a single proxy, a one-item list, or the legacy `proxies:` wrapper. */
+export function parseCustomProxyYaml(
+  source: string,
+): Record<string, unknown> & { name: string; type: string } {
+  if (!source.trim()) throw new CustomProxyValidationError("请填写节点 YAML。");
+  if (source.length > 128 * 1024)
+    throw new CustomProxyValidationError("单个节点 YAML 不能超过 128 KiB。");
+  const doc = parseDocument(source, { prettyErrors: false, uniqueKeys: true });
+  if (doc.errors.length || doc.warnings.length) {
+    // Parser messages can contain credentials from the YAML; do not echo them.
+    throw new CustomProxyValidationError(
+      "YAML 格式错误，请检查缩进、引号和重复字段。",
+    );
+  }
+  let value: unknown;
+  try {
+    value = doc.toJS({ maxAliasCount: 100 });
+  } catch {
+    throw new CustomProxyValidationError(
+      "YAML 引用无效或过多，请使用独立的节点配置。",
+    );
+  }
+  if (isRecord(value) && "proxies" in value) value = value.proxies;
+  if (Array.isArray(value)) {
+    if (value.length !== 1)
+      throw new CustomProxyValidationError(
+        "每条节点记录只能包含一个 proxy，请将多个节点分别添加。",
+      );
+    value = value[0];
+  }
+  if (!isRecord(value))
+    throw new CustomProxyValidationError(
+      "请填写一个 Clash proxy 对象或单节点列表。",
+    );
+  if (typeof value.name !== "string" || !value.name.trim()) {
+    throw new CustomProxyValidationError(
+      "节点 YAML 必须包含非空的 name 字段（字符串）。",
+    );
+  }
+  if (typeof value.type !== "string" || !value.type.trim()) {
+    throw new CustomProxyValidationError(
+      "节点 YAML 必须包含非空的 type 字段，例如 anytls。",
+    );
+  }
+  return value as Record<string, unknown> & { name: string; type: string };
+}
+
+/** Re-serialize only for output; stored source and comments remain untouched. */
+export function renderCustomProxyYaml(source: string) {
+  return stringify([parseCustomProxyYaml(source)], { lineWidth: 0 }).trimEnd();
+}
+
+export function extractProxyNameFromYaml(source: string) {
+  try {
+    return parseCustomProxyYaml(source).name;
+  } catch {
+    return null;
+  }
+}