feat: add server config validation

plugin/core/config.ts

@@ -0,0 +1,104 @@
+export interface YonexusServerConfig {
+  followerIdentifiers: string[];
+  notifyBotToken: string;
+  adminUserId: string;
+  listenHost?: string;
+  listenPort: number;
+  publicWsUrl?: string;
+}
+
+export class YonexusServerConfigError extends Error {
+  readonly issues: string[];
+
+  constructor(issues: string[]) {
+    super(`Invalid Yonexus.Server config: ${issues.join("; ")}`);
+    this.name = "YonexusServerConfigError";
+    this.issues = issues;
+  }
+}
+
+function isNonEmptyString(value: unknown): value is string {
+  return typeof value === "string" && value.trim().length > 0;
+}
+
+function normalizeOptionalString(value: unknown): string | undefined {
+  if (value === undefined || value === null) {
+    return undefined;
+  }
+
+  if (typeof value !== "string") {
+    return undefined;
+  }
+
+  const trimmed = value.trim();
+  return trimmed.length > 0 ? trimmed : undefined;
+}
+
+function isValidPort(value: unknown): value is number {
+  return Number.isInteger(value) && value >= 1 && value <= 65535;
+}
+
+function isValidWsUrl(value: string): boolean {
+  try {
+    const url = new URL(value);
+    return url.protocol === "ws:" || url.protocol === "wss:";
+  } catch {
+    return false;
+  }
+}
+
+export function validateYonexusServerConfig(raw: unknown): YonexusServerConfig {
+  const source = raw as Record<string, unknown> | null;
+  const issues: string[] = [];
+
+  const rawIdentifiers = source?.followerIdentifiers;
+  const followerIdentifiers = Array.isArray(rawIdentifiers)
+    ? rawIdentifiers
+        .filter((value): value is string => typeof value === "string")
+        .map((value) => value.trim())
+        .filter((value) => value.length > 0)
+    : [];
+
+  if (!Array.isArray(rawIdentifiers) || followerIdentifiers.length === 0) {
+    issues.push("followerIdentifiers must contain at least one non-empty identifier");
+  }
+
+  if (new Set(followerIdentifiers).size !== followerIdentifiers.length) {
+    issues.push("followerIdentifiers must not contain duplicates");
+  }
+
+  const notifyBotToken = source?.notifyBotToken;
+  if (!isNonEmptyString(notifyBotToken)) {
+    issues.push("notifyBotToken is required");
+  }
+
+  const adminUserId = source?.adminUserId;
+  if (!isNonEmptyString(adminUserId)) {
+    issues.push("adminUserId is required");
+  }
+
+  const listenPort = source?.listenPort;
+  if (!isValidPort(listenPort)) {
+    issues.push("listenPort must be an integer between 1 and 65535");
+  }
+
+  const listenHost = normalizeOptionalString(source?.listenHost) ?? "0.0.0.0";
+  const publicWsUrl = normalizeOptionalString(source?.publicWsUrl);
+
+  if (publicWsUrl !== undefined && !isValidWsUrl(publicWsUrl)) {
+    issues.push("publicWsUrl must be a valid ws:// or wss:// URL when provided");
+  }
+
+  if (issues.length > 0) {
+    throw new YonexusServerConfigError(issues);
+  }
+
+  return {
+    followerIdentifiers,
+    notifyBotToken: notifyBotToken.trim(),
+    adminUserId: adminUserId.trim(),
+    listenHost,
+    listenPort,
+    publicWsUrl
+  };
+}

plugin/index.ts

@@ -1,3 +1,6 @@
+export { validateYonexusServerConfig, YonexusServerConfigError } from "./core/config.js";
+export type { YonexusServerConfig } from "./core/config.js";
+
 export interface YonexusServerPluginManifest {
   readonly name: "Yonexus.Server";
   readonly version: string;