@cashfarm/lang/lib/fqn.js

Extends TypeScript/Javascript with basic classes and functions

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const is_1 = require("./is");
const symbols_1 = require("./symbols");
function FQN(fqn) {
    return (target) => {
        target[symbols_1.Symbols.FQN] = fqn;
    };
}
exports.FQN = FQN;
function parseFQN(fqn) {
    const [pkg, property, ...rest] = fqn.split(':');
    if (is_1.isEmpty(pkg) || is_1.isEmpty(property) || rest.length)
        throw new Error(`Invalid FQN "${fqn}". FQN format should be "{PACKAGE}:[NS.]?{CLASS}"`);
    const parts = property.split('.');
    return {
        package: pkg,
        namespace: parts[0],
        propertyPath: parts.join('.'),
        className: parts.pop()
    };
}
exports.parseFQN = parseFQN;
function requireByFQN(fqn) {
    const info = parseFQN(fqn);
    const pkg = require(info.package);
    const props = info.propertyPath.split('.');
    let currLocation = `package ${pkg}`;
    return props.reduce((currNS, currProp, index) => {
        if (typeof currNS[currProp] === undefined) {
            throw new Error(`Requiring from FQN ${fqn} failed.` +
                `Property ${currProp} does not exist in ${currLocation}`);
        }
        currLocation = props.slice(0, index).join('.');
        return currNS[currProp];
    }, pkg);
}
exports.requireByFQN = requireByFQN;
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