release: WRNexusJS 0.8.0

packages/styles/src/config.ts

@@ -8,14 +8,20 @@
  */
 
 import { existsSync, readFileSync } from "node:fs";
-import { join } from "node:path";
+import { dirname, extname, join, resolve } from "node:path";
+import { createRequire } from "node:module";
 import { pathToFileURL } from "node:url";
 import type { PerformanceBudgets, SecurityConfig, SeoConfig } from "@wrnexus/core";
-import type { PluginInput } from "@wrnexus/plugin";
+import type { PluginInput, PluginPermission } from "@wrnexus/plugin";
 import type { StorageConfig } from "@wrnexus/uploader";
 import type { ThemeConfig } from "./theme.ts";
 import type { FontConfig } from "./fonts.ts";
 import { fontCspSources } from "./fonts.ts";
+import {
+  isCompatibilityDate,
+  resolveCompatibility,
+  type CompatibilityPolicy,
+} from "./compatibility.ts";
 
 export type Mode = "development" | "production";
 
@@ -120,6 +126,15 @@ export interface PwaConfig {
   cacheUrls?: string[];
   /** Service-worker cache key. Change it to invalidate existing PWA caches. */
   cacheName?: string;
+  /** Ordered URL rules for runtime caching. Patterns are regular-expression source strings. */
+  runtimeCaching?: Array<{
+    pattern: string;
+    strategy: "network-first" | "cache-first" | "stale-while-revalidate";
+    cacheName?: string;
+    methods?: string[];
+  }>;
+  /** Background Sync tag used by the offline mutation queue. */
+  backgroundSyncTag?: string;
 }
 
 export type DevToolbarPosition = "bottom-center" | "bottom-left" | "bottom-right";
@@ -229,9 +244,16 @@ export interface CompatibilityConfig {
   stringLayouts?: boolean;
 }
 
-export interface AppConfig {
+export interface AppConfig extends CompatibilityPolicy {
+  /** Ordered reusable configuration layers; the application always has final precedence. */
+  extends?: string | string[];
   /** Compiler/dev/build plugins, resolved in deterministic pre/normal/post order. */
   plugins?: PluginInput;
+  /** Optional least-privilege enforcement for automatically discovered packages. */
+  pluginPermissions?: {
+    enforce?: boolean;
+    grants?: Record<string, PluginPermission[]>;
+  };
   /** WRN v0.6 explicit import and compatibility resolution. */
   imports?: ImportsConfig;
   /** TypeScript-backed .wrn type checking and declaration generation. */
@@ -276,7 +298,21 @@ export interface AppConfig {
   /** Design-token themes (deep-merged over the built-in light/dark). */
   theme?: ThemeConfig;
   /** i18n: default language + supported locales (strings live in app/locales/*.json). */
-  i18n?: { default?: string; locales?: string[] };
+  i18n?: {
+    default?: string;
+    locales?: string[];
+    labels?: Record<string, string>;
+    fallbacks?: Record<string, string[]>;
+    direction?: Record<string, "ltr" | "rtl">;
+    cookie?: {
+      name?: string;
+      maxAge?: number;
+      path?: string;
+      sameSite?: "Strict" | "Lax" | "None";
+      secure?: boolean;
+    };
+    strict?: boolean;
+  };
   /** Default database connection (driver + url); reached with `getDb()`. */
   db?: { driver: "sqlite" | "postgres" | "mysql" | "mongo"; url: string };
   /**
@@ -330,15 +366,116 @@ function isPlainObject(value: unknown): value is Record<string, unknown> {
 }
 
 /** Deep-merge `override` onto `base` (objects merge; arrays/scalars replace). */
-function deepMerge<T>(base: T, override: unknown): T {
+function deepMerge<T>(base: T, override: unknown, path = ""): T {
   if (!isPlainObject(base) || !isPlainObject(override)) return (override ?? base) as T;
   const out: Record<string, unknown> = { ...base };
   for (const [key, value] of Object.entries(override)) {
-    out[key] = key in out ? deepMerge(out[key], value) : value;
+    const currentPath = path ? `${path}.${key}` : key;
+    if (
+      key in out &&
+      ["plugins", "head"].includes(currentPath) &&
+      (Array.isArray(out[key]) || Array.isArray(value))
+    ) {
+      const before = Array.isArray(out[key]) ? out[key] : out[key] == null ? [] : [out[key]];
+      const after = Array.isArray(value) ? value : value == null ? [] : [value];
+      out[key] = [...before, ...after];
+    } else {
+      out[key] = key in out ? deepMerge(out[key], value, currentPath) : value;
+    }
   }
   return out as T;
 }
 
+const LAYER_CONFIG_NAMES = [
+  "wrnexus.layer.ts",
+  "wrnexus.layer.js",
+  "wrnexus.layer.mjs",
+  ...CONFIG_NAMES,
+];
+
+function layerSpecifiers(config: AppConfig): string[] {
+  return config.extends ? (Array.isArray(config.extends) ? config.extends : [config.extends]) : [];
+}
+
+function resolveLayerFile(specifier: string, declaringRoot: string, appRoot: string): string {
+  const local =
+    specifier.startsWith(".") || specifier.startsWith("/") || /^[A-Za-z]:[\\/]/.test(specifier);
+  if (local) {
+    const candidate = resolve(declaringRoot, specifier);
+    if (extname(candidate) && existsSync(candidate)) return candidate;
+    for (const name of LAYER_CONFIG_NAMES) {
+      const file = join(candidate, name);
+      if (existsSync(file)) return file;
+    }
+    throw new Error(`WRN-CONFIG-LAYER-NOT-FOUND: ${specifier} from ${declaringRoot}.`);
+  }
+  const require = createRequire(join(appRoot, "package.json"));
+  try {
+    const packageFile = require.resolve(`${specifier}/package.json`);
+    const packageRoot = dirname(packageFile);
+    const pkg = JSON.parse(readFileSync(packageFile, "utf8")) as {
+      wrnexus?: { layer?: string };
+    };
+    if (pkg.wrnexus?.layer) {
+      const file = resolve(packageRoot, pkg.wrnexus.layer);
+      if (existsSync(file)) return file;
+    }
+    for (const name of LAYER_CONFIG_NAMES) {
+      const file = join(packageRoot, name);
+      if (existsSync(file)) return file;
+    }
+  } catch (error) {
+    throw new Error(`WRN-CONFIG-LAYER-NOT-FOUND: package ${specifier} from ${appRoot}.`, {
+      cause: error,
+    });
+  }
+  throw new Error(`WRN-CONFIG-LAYER-ENTRY: ${specifier} has no wrnexus layer entry.`);
+}
+
+async function importConfigFile(file: string): Promise<AppConfig> {
+  const mod = (await import(pathToFileURL(file).href)) as { default?: AppConfig };
+  if (!mod.default || !isPlainObject(mod.default)) {
+    throw new Error(`WRN-CONFIG-LAYER-SHAPE: ${file} must export a configuration object.`);
+  }
+  return mod.default;
+}
+
+export interface ResolvedConfigLayers {
+  config: AppConfig;
+  sources: string[];
+}
+
+export async function resolveConfigLayers(
+  appRoot: string,
+  application: AppConfig,
+): Promise<ResolvedConfigLayers> {
+  const sources: string[] = [];
+  const visiting: string[] = [];
+  const resolvedFiles = new Set<string>();
+  const visit = async (config: AppConfig, declaringRoot: string): Promise<AppConfig> => {
+    let merged: AppConfig = {};
+    for (const specifier of layerSpecifiers(config)) {
+      const file = resolveLayerFile(specifier, declaringRoot, appRoot);
+      if (visiting.includes(file)) {
+        throw new Error(`WRN-CONFIG-LAYER-CYCLE: ${[...visiting, file].join(" -> ")}`);
+      }
+      visiting.push(file);
+      const layer = await importConfigFile(file);
+      const resolvedLayer = await visit(layer, dirname(file));
+      visiting.pop();
+      merged = deepMerge(merged, resolvedLayer);
+      if (!resolvedFiles.has(file)) {
+        resolvedFiles.add(file);
+        sources.push(file);
+      }
+    }
+    const own = { ...config };
+    delete own.extends;
+    return deepMerge(merged, own);
+  };
+  return { config: await visit(application, appRoot), sources };
+}
+
 /** Load the raw `wrnexus.config.*` (with the `profiles` map intact), or `{}`. */
 export async function loadRawConfig(appRoot: string): Promise<AppConfig> {
   for (const name of CONFIG_NAMES) {
@@ -358,10 +495,12 @@ export async function loadAppConfig(appRoot: string, profile?: string): Promise<
   // module evaluation. Load the profile cascade before importing the module so
   // development and production behave consistently.
   loadEnv(appRoot, active);
-  const base = await loadRawConfig(appRoot);
+  const raw = await loadRawConfig(appRoot);
+  const { config: base } = await resolveConfigLayers(appRoot, raw);
   const override = base.profiles?.[active];
   const merged: AppConfig = override ? deepMerge(base, override) : { ...base };
   delete merged.profiles;
+  delete merged.extends;
   applyFontCsp(merged);
   const issues = validateAppConfig(merged);
   const errors = issues.filter((issue) => issue.severity === "error");
@@ -451,14 +590,66 @@ export function defineConfig(config: AppConfig): AppConfig {
 
 export function validateAppConfig(config: AppConfig): ConfigIssue[] {
   const issues: ConfigIssue[] = [];
+  if (config.compatibilityDate !== undefined && !isCompatibilityDate(config.compatibilityDate)) {
+    issues.push({
+      path: "compatibilityDate",
+      severity: "error",
+      message: "must be a real ISO calendar date in YYYY-MM-DD format",
+    });
+  }
+  if (
+    config.frameworkBehaviour !== undefined &&
+    (!Number.isInteger(config.frameworkBehaviour) || config.frameworkBehaviour < 1)
+  ) {
+    issues.push({
+      path: "frameworkBehaviour",
+      severity: "error",
+      message: "must be a positive integer",
+    });
+  }
+  const compatibility = resolveCompatibility(config);
+  if (compatibility.future) {
+    issues.push({
+      path: "compatibilityDate",
+      severity: "error",
+      message: "targets framework behavior newer than this version supports",
+    });
+  }
   const sampleRate = config.observability?.sampleRate;
-  if (sampleRate !== undefined && (sampleRate < 0 || sampleRate > 1)) {
+  if (
+    sampleRate !== undefined &&
+    (!Number.isFinite(sampleRate) || sampleRate < 0 || sampleRate > 1)
+  ) {
     issues.push({
       path: "observability.sampleRate",
       severity: "error",
       message: "must be between 0 and 1",
     });
   }
+  if (config.observability?.exporter === "otlp") {
+    const endpoint = config.observability.endpoint;
+    const validEndpoint = (() => {
+      try {
+        return Boolean(endpoint && ["http:", "https:"].includes(new URL(endpoint).protocol));
+      } catch {
+        return false;
+      }
+    })();
+    if (!validEndpoint) {
+      issues.push({
+        path: "observability.endpoint",
+        severity: "error",
+        message: "must be an absolute HTTP(S) URL when exporter is otlp",
+      });
+    }
+  }
+  if (config.observability?.serviceName !== undefined && !config.observability.serviceName.trim()) {
+    issues.push({
+      path: "observability.serviceName",
+      severity: "error",
+      message: "must not be empty",
+    });
+  }
   const budgets = config.performance?.budgets;
   if (budgets) {
     for (const [name, value] of Object.entries(budgets)) {
@@ -494,7 +685,9 @@ export async function explainAppConfig(
 ): Promise<ExplainedConfig> {
   const active = profile ?? resolveProfile();
   const config = await loadAppConfig(appRoot, active);
-  const sources = CONFIG_NAMES.filter((name) => existsSync(join(appRoot, name)));
+  const appSources = CONFIG_NAMES.filter((name) => existsSync(join(appRoot, name)));
+  const raw = await loadRawConfig(appRoot);
+  const layerSources = (await resolveConfigLayers(appRoot, raw)).sources;
   const envSources = [".env", ".env.local", `.env.${active}`, `.env.${active}.local`].filter(
     (name) => existsSync(join(appRoot, name)),
   );
@@ -502,7 +695,7 @@ export async function explainAppConfig(
     profile: active,
     config,
     issues: validateAppConfig(config),
-    sources: [...sources, ...envSources],
+    sources: [...layerSources, ...appSources, ...envSources],
   };
 }