bkc/execute/expr.js

:dog: If there are no dogs in Heaven, then when I die I want to go where they went.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const ast_1 = require("../types/ast");
const error_1 = require("./error");
var NODE_TYPES;
(function (NODE_TYPES) {
    NODE_TYPES["STRING"] = "string";
    NODE_TYPES["NUMBER"] = "number";
    NODE_TYPES["ARRAY"] = "object";
    NODE_TYPES["OBJECT"] = "object";
})(NODE_TYPES = exports.NODE_TYPES || (exports.NODE_TYPES = {}));
exports.checkExpr = (expr) => {
    if (expr === ast_1.EXPRESSION.PLUS
        || expr === ast_1.EXPRESSION.MINUS
        || expr === '*'
        || expr === '/'
        || expr === '='
        || expr === '<'
        || expr === '>'
        || expr === '<='
        || expr === '>='
        || expr === '=='
        || expr === '!=') {
        return expr;
    }
    else {
        return null;
    }
};
exports.checkExist = (anything) => {
    if (anything === undefined) {
        return false;
    }
    return true;
};
const executeExpr = (exprE, arg1, arg2) => {
    const expr = exports.checkExpr(exprE);
    if (!expr) {
        throw error_1.error(error_1.ERROR_CODE.INVALID_EXPRESSION);
    }
    switch (expr) {
        case ast_1.EXPRESSION.PLUS:
            if (!exports.checkExist(arg2)) {
                throw error_1.error(error_1.ERROR_CODE.NOT_ENOUGH_ARGUMENT);
            }
            if (typeof arg1 === 'string') {
                return arg1 + arg2;
            }
            else if (typeof arg2 === 'string') {
                return arg1 + arg2;
            }
            else {
                return arg1 + arg2;
            }
        case ast_1.EXPRESSION.MINUS:
            if (!exports.checkExist(arg2)) {
                throw error_1.error(error_1.ERROR_CODE.NOT_ENOUGH_ARGUMENT);
            }
            if (typeof arg1 === 'number' && typeof arg2 === 'number') {
                return arg1 - arg2;
            }
            else {
                throw error_1.error(error_1.ERROR_CODE.ILLEGAL_CALCULATION);
            }
        case '*':
            if (!exports.checkExist(arg2)) {
                throw error_1.error(error_1.ERROR_CODE.NOT_ENOUGH_ARGUMENT);
            }
            if (typeof arg1 === 'number' && typeof arg2 === 'number') {
                return arg1 * arg2;
            }
            else {
                throw error_1.error(error_1.ERROR_CODE.ILLEGAL_CALCULATION);
            }
        case '/':
            if (!exports.checkExist(arg2)) {
                throw error_1.error(error_1.ERROR_CODE.NOT_ENOUGH_ARGUMENT);
            }
            if (typeof arg1 === 'number' && typeof arg2 === 'number') {
                return arg1 / arg2;
            }
            else {
                throw error_1.error(error_1.ERROR_CODE.ILLEGAL_CALCULATION);
            }
        case '=':
            return arg1;
        case '<':
            if (!exports.checkExist(arg2)) {
                throw error_1.error(error_1.ERROR_CODE.NOT_ENOUGH_ARGUMENT);
            }
            if (typeof arg1 === 'number' && typeof arg2 === 'number') {
                return arg1 < arg2 ? 1 : 0;
            }
            else {
                throw error_1.error(error_1.ERROR_CODE.ILLEGAL_CALCULATION);
            }
        case '>':
            if (!exports.checkExist(arg2)) {
                throw error_1.error(error_1.ERROR_CODE.NOT_ENOUGH_ARGUMENT);
            }
            if (typeof arg1 === 'number' && typeof arg2 === 'number') {
                return arg1 > arg2 ? 1 : 0;
            }
            else {
                throw error_1.error(error_1.ERROR_CODE.ILLEGAL_CALCULATION);
            }
        case '<=':
            if (!exports.checkExist(arg2)) {
                throw error_1.error(error_1.ERROR_CODE.NOT_ENOUGH_ARGUMENT);
            }
            if (typeof arg1 === 'number' && typeof arg2 === 'number') {
                return arg1 <= arg2 ? 1 : 0;
            }
            else {
                throw error_1.error(error_1.ERROR_CODE.ILLEGAL_CALCULATION);
            }
        case '>=':
            if (!exports.checkExist(arg2)) {
                throw error_1.error(error_1.ERROR_CODE.NOT_ENOUGH_ARGUMENT);
            }
            if (typeof arg1 === 'number' && typeof arg2 === 'number') {
                return arg1 >= arg2 ? 1 : 0;
            }
            else {
                throw error_1.error(error_1.ERROR_CODE.ILLEGAL_CALCULATION);
            }
        case '==':
            if (!exports.checkExist(arg2)) {
                throw error_1.error(error_1.ERROR_CODE.NOT_ENOUGH_ARGUMENT);
            }
            if (typeof arg1 === 'number' && typeof arg2 === 'number') {
                return arg1 === arg2 ? 1 : 0;
            }
            else {
                throw error_1.error(error_1.ERROR_CODE.ILLEGAL_CALCULATION);
            }
        case '!=':
            if (!exports.checkExist(arg2)) {
                throw error_1.error(error_1.ERROR_CODE.NOT_ENOUGH_ARGUMENT);
            }
            if (typeof arg1 === 'number' && typeof arg2 === 'number') {
                return arg1 !== arg2 ? 1 : 0;
            }
            else {
                throw error_1.error(error_1.ERROR_CODE.ILLEGAL_CALCULATION);
            }
        default:
            throw error_1.error(error_1.ERROR_CODE.ILLEGAL_CALCULATION);
    }
};
exports.default = executeExpr;