expo-dev-client/plugin/build/getDefaultScheme.js

Expo Development Client

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/*
 * Converts the slug from app configuration to a string that's a valid URI scheme.
 * From RFC3986 Section 3.1.
 * scheme      = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
 */
function getDefaultScheme(config) {
    if (typeof config !== 'object') {
        throw new TypeError('getDefaultScheme: config is not object');
    }
    if (!config.slug || typeof config.slug !== 'string') {
        throw new TypeError('getDefaultScheme: config missing required property "slug"');
    }
    // Remove unallowed characters. Also remove `-` to keep this shorter.
    let scheme = config.slug.replace(/[^A-Za-z0-9+\-.]/g, '');
    // Edge case: if the slug didn't include any allowed characters we may end up with an empty string.
    if (scheme.length === 0) {
        throw new Error('Could not autogenerate a scheme. Please make sure the "slug" property in app config consists of URL friendly characters.');
    }
    // Lowercasing might not be strictly necessary, but let's do it for stylistic purposes.
    scheme = scheme.toLowerCase();
    // Add a prefix to avoid leading digits and to distinguish from user-defined schemes.
    return `exp+${scheme}`;
}
exports.default = getDefaultScheme;