refactor(theme-search-algolia): migrate package to TS (#5935)

packages/docusaurus-theme-search-algolia/src/validateThemeConfig.ts

@@ -0,0 +1,48 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import {Joi} from '@docusaurus/utils-validation';
+import type {ThemeConfig, Validate, ValidationResult} from '@docusaurus/types';
+
+const DEFAULT_CONFIG = {
+  contextualSearch: false, // future: maybe we want to enable this by default
+
+  // By default, all Docusaurus sites are using the same AppId
+  // This has been designed on purpose with Algolia.
+  appId: 'BH4D9OD16A',
+
+  searchParameters: {},
+};
+exports.DEFAULT_CONFIG = DEFAULT_CONFIG;
+
+export const Schema = Joi.object({
+  algolia: Joi.object({
+    // Docusaurus attributes
+    contextualSearch: Joi.boolean().default(DEFAULT_CONFIG.contextualSearch),
+    externalUrlRegex: Joi.string().optional(),
+    // Algolia attributes
+    appId: Joi.string().default(DEFAULT_CONFIG.appId),
+    apiKey: Joi.string().required(),
+    indexName: Joi.string().required(),
+    searchParameters: Joi.object()
+      .default(DEFAULT_CONFIG.searchParameters)
+      .unknown(),
+  })
+    .label('themeConfig.algolia')
+    .required()
+    .unknown(), // DocSearch 3 is still alpha: don't validate the rest for now
+});
+
+export function validateThemeConfig({
+  validate,
+  themeConfig,
+}: {
+  validate: Validate<ThemeConfig>;
+  themeConfig: ThemeConfig;
+}): ValidationResult<ThemeConfig> {
+  return validate(Schema, themeConfig);
+}