@conte-ltd/trpc-shield/lib/generator.js

tRPC permissions as another layer of abstraction!

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.generateMiddlewareFromRuleTree = void 0;
/**
 *
 * @param ruleTree
 * @param options
 *
 * Generates middleware from given rules.
 *
 */
function generateMiddlewareFromRuleTree(ruleTree, options) {
    return ({ next, ctx, type, path, input, rawInput, }) => {
        var _a, _b;
        const opWithPath = path.split('.');
        let rule;
        if (opWithPath.length > 1) {
            const opNames = opWithPath.reduce((prev, current, index) => {
                if (index === 0) {
                    return [current, `${current}.*`];
                }
                else if (index === opWithPath.length - 1) {
                    const [prevHead, ...prevTail] = prev;
                    return [`${prevHead}.${current}`, ...prevTail, `*.${current}`];
                }
                else {
                    const [prevHead, ...prevTail] = prev;
                    return [`${prevHead}.${current}`, ...prevTail, `*.${current}.*`];
                }
            }, []);
            opNames.push('*');
            for (const opName of opNames) {
                rule = (_a = ruleTree === null || ruleTree === void 0 ? void 0 : ruleTree[type]) === null || _a === void 0 ? void 0 : _a[opName];
                if (rule !== undefined) {
                    break;
                }
            }
        }
        else {
            const opName = opWithPath[0];
            rule = (_b = ruleTree === null || ruleTree === void 0 ? void 0 : ruleTree[type]) === null || _b === void 0 ? void 0 : _b[opName];
        }
        if (rule) {
            return rule.resolve(ctx, type, path, input, rawInput, options).then((result) => {
                if (!result)
                    throw options.fallbackError;
                return next();
            });
        }
        return next();
    };
}
exports.generateMiddlewareFromRuleTree = generateMiddlewareFromRuleTree;
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