twing/dist/cjs/lib/tag-handler/if.js

First-class Twig engine for Node.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.createIfTagHandler = void 0;
const node_1 = require("../node");
const if_1 = require("../node/if");
/**
 * Tests a condition.
 *
 * <pre>
 * {% if users %}
 *  <ul>
 *    {% for user in users %}
 *      <li>{{ user.username|e }}</li>
 *    {% endfor %}
 *  </ul>
 * {% endif %}
 * </pre>
 */
const createIfTagHandler = () => {
    const tag = 'if';
    const decideIfFork = (token) => {
        return token.test("NAME", ['elseif', 'else', 'endif']);
    };
    return {
        tag,
        initialize: (parser) => {
            return (token, stream) => {
                const { line, column } = token;
                let expression = parser.parseExpression(stream);
                stream.expect("TAG_END");
                let index = 0;
                let body = parser.subparse(stream, tag, decideIfFork);
                const tests = {
                    [index++]: expression,
                    [index++]: body
                };
                let elseNode = null;
                let end = stream.isEOF();
                while (!end) {
                    switch (stream.next().value) {
                        case 'else':
                            stream.expect("TAG_END");
                            elseNode = parser.subparse(stream, tag, (token) => {
                                return token.test("NAME", 'endif');
                            });
                            break;
                        case 'elseif':
                            expression = parser.parseExpression(stream);
                            stream.expect("TAG_END");
                            body = parser.subparse(stream, tag, decideIfFork);
                            tests[index++] = expression;
                            tests[index++] = body;
                            break;
                        case 'endif':
                            end = true;
                            break;
                    }
                }
                stream.expect("TAG_END");
                return (0, if_1.createIfNode)((0, node_1.createNode)(tests), elseNode, line, column, tag);
            };
        }
    };
};
exports.createIfTagHandler = createIfTagHandler;