@gabliam/expression/src/expression.js

expression parser

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Expression = void 0;
const tslib_1 = require("tslib");
const lodash_1 = tslib_1.__importDefault(require("lodash"));
const parser_1 = require("./parser");
// eslint-disable-next-line @typescript-eslint/no-var-requires
const validPath = require('is-valid-path');
class Expression {
    constructor(ast, context, input) {
        this.context = context;
        this.input = input;
        if (ast) {
            this.parser = new parser_1.Parser(ast);
        }
    }
    getValue(vars = {}) {
        if (!this.parser) {
            if (validPath(this.input)) {
                return this.input;
            }
            return undefined;
        }
        const context = Object.keys(vars).reduce((prev, current) => {
            prev[`$${current}`] = lodash_1.default.cloneDeep(vars[current]);
            return prev;
        }, {
            $root: this.context,
        });
        try {
            const res = this.parser.parse(Object.assign(Object.assign({}, this.context), context));
            if (res === null && validPath(this.input)) {
                return this.input;
            }
            if (res === parser_1.IS_STRING) {
                return this.input;
            }
            return res;
        }
        catch (e) {
            // case of multiple subpath
            if (validPath(this.input)) {
                return this.input;
            }
            throw e;
        }
    }
}
exports.Expression = Expression;