@gabliam/expression/src/expression-parser.js

expression parser

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ExpressionParser = void 0;
const tslib_1 = require("tslib");
const esprima = tslib_1.__importStar(require("esprima"));
const lodash_1 = tslib_1.__importDefault(require("lodash"));
const expression_1 = require("./expression");
class ExpressionParser {
    static eval(input, vars = {}) {
        const expressionParser = new ExpressionParser({});
        return expressionParser.parseExpression(input).getValue(vars);
    }
    constructor(context = {}) {
        this.context = lodash_1.default.cloneDeep(context);
    }
    parseExpression(input) {
        try {
            const program = esprima.parseScript(input);
            const ast = program.body[0].expression;
            return new expression_1.Expression(ast, this.context, input);
        }
        catch (_a) {
            return new expression_1.Expression(null, this.context, input);
        }
    }
}
exports.ExpressionParser = ExpressionParser;