Add components

slider/node_modules/eslint/lib/languages/js/validate-language-options.js

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+/**
+ * @fileoverview The schema to validate language options
+ * @author Nicholas C. Zakas
+ */
+
+"use strict";
+
+//-----------------------------------------------------------------------------
+// Data
+//-----------------------------------------------------------------------------
+
+const globalVariablesValues = new Set([
+	true,
+	"true",
+	"writable",
+	"writeable",
+	false,
+	"false",
+	"readonly",
+	"readable",
+	null,
+	"off",
+]);
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Check if a value is a non-null object.
+ * @param {any} value The value to check.
+ * @returns {boolean} `true` if the value is a non-null object.
+ */
+function isNonNullObject(value) {
+	return typeof value === "object" && value !== null;
+}
+
+/**
+ * Check if a value is a non-null non-array object.
+ * @param {any} value The value to check.
+ * @returns {boolean} `true` if the value is a non-null non-array object.
+ */
+function isNonArrayObject(value) {
+	return isNonNullObject(value) && !Array.isArray(value);
+}
+
+/**
+ * Check if a value is undefined.
+ * @param {any} value The value to check.
+ * @returns {boolean} `true` if the value is undefined.
+ */
+function isUndefined(value) {
+	return typeof value === "undefined";
+}
+
+//-----------------------------------------------------------------------------
+// Schemas
+//-----------------------------------------------------------------------------
+
+/**
+ * Validates the ecmaVersion property.
+ * @param {string|number} ecmaVersion The value to check.
+ * @returns {void}
+ * @throws {TypeError} If the value is invalid.
+ */
+function validateEcmaVersion(ecmaVersion) {
+	if (isUndefined(ecmaVersion)) {
+		throw new TypeError(
+			'Key "ecmaVersion": Expected an "ecmaVersion" property.',
+		);
+	}
+
+	if (typeof ecmaVersion !== "number" && ecmaVersion !== "latest") {
+		throw new TypeError(
+			'Key "ecmaVersion": Expected a number or "latest".',
+		);
+	}
+}
+
+/**
+ * Validates the sourceType property.
+ * @param {string} sourceType The value to check.
+ * @returns {void}
+ * @throws {TypeError} If the value is invalid.
+ */
+function validateSourceType(sourceType) {
+	if (
+		typeof sourceType !== "string" ||
+		!/^(?:script|module|commonjs)$/u.test(sourceType)
+	) {
+		throw new TypeError(
+			'Key "sourceType": Expected "script", "module", or "commonjs".',
+		);
+	}
+}
+
+/**
+ * Validates the globals property.
+ * @param {Object} globals The value to check.
+ * @returns {void}
+ * @throws {TypeError} If the value is invalid.
+ */
+function validateGlobals(globals) {
+	if (!isNonArrayObject(globals)) {
+		throw new TypeError('Key "globals": Expected an object.');
+	}
+
+	for (const key of Object.keys(globals)) {
+		// avoid hairy edge case
+		if (key === "__proto__") {
+			continue;
+		}
+
+		if (key !== key.trim()) {
+			throw new TypeError(
+				`Key "globals": Global "${key}" has leading or trailing whitespace.`,
+			);
+		}
+
+		if (!globalVariablesValues.has(globals[key])) {
+			throw new TypeError(
+				`Key "globals": Key "${key}": Expected "readonly", "writable", or "off".`,
+			);
+		}
+	}
+}
+
+/**
+ * Validates the parser property.
+ * @param {Object} parser The value to check.
+ * @returns {void}
+ * @throws {TypeError} If the value is invalid.
+ */
+function validateParser(parser) {
+	if (
+		!parser ||
+		typeof parser !== "object" ||
+		(typeof parser.parse !== "function" &&
+			typeof parser.parseForESLint !== "function")
+	) {
+		throw new TypeError(
+			'Key "parser": Expected object with parse() or parseForESLint() method.',
+		);
+	}
+}
+
+/**
+ * Validates the language options.
+ * @param {Object} languageOptions The language options to validate.
+ * @returns {void}
+ * @throws {TypeError} If the language options are invalid.
+ */
+function validateLanguageOptions(languageOptions) {
+	if (!isNonArrayObject(languageOptions)) {
+		throw new TypeError("Expected an object.");
+	}
+
+	const {
+		ecmaVersion,
+		sourceType,
+		globals,
+		parser,
+		parserOptions,
+		...otherOptions
+	} = languageOptions;
+
+	if ("ecmaVersion" in languageOptions) {
+		validateEcmaVersion(ecmaVersion);
+	}
+
+	if ("sourceType" in languageOptions) {
+		validateSourceType(sourceType);
+	}
+
+	if ("globals" in languageOptions) {
+		validateGlobals(globals);
+	}
+
+	if ("parser" in languageOptions) {
+		validateParser(parser);
+	}
+
+	if ("parserOptions" in languageOptions) {
+		if (!isNonArrayObject(parserOptions)) {
+			throw new TypeError('Key "parserOptions": Expected an object.');
+		}
+	}
+
+	const otherOptionKeys = Object.keys(otherOptions);
+
+	if (otherOptionKeys.length > 0) {
+		throw new TypeError(`Unexpected key "${otherOptionKeys[0]}" found.`);
+	}
+}
+
+module.exports = { validateLanguageOptions };