@yusufkandemir/eslint-plugin-lodash-template/lib/parser/parse-template-script/embed-interpolations.js

ESLint plugin for John Resig-style micro template, Lodash's template, Underscore's template and EJS.

"use strict";

const hash = require("../../utils/hash");
const { LocationCalculator, LocationMap } = require("./location-calculator");

/**
 * Checks if the given token is intersects of striped ranges
 * @param {*} token token
 * @param {*} stripedRanges ranges
 */
function isIntersects(token, stripedRanges) {
    const tokenRange = token.range;
    for (const stripedRange of stripedRanges) {
        if (
            tokenRange[0] < stripedRange[1] &&
            stripedRange[0] < tokenRange[1]
        ) {
            return true;
        }
    }
    return false;
}

/**
 * Embed the interpolation part in the rendered template.
 */
module.exports = function (
    template,
    scriptCode,
    microTemplateService,
    stripedRanges,
) {
    let code = "";
    let nextStart = 0;

    const locMap = new LocationMap();

    for (const token of microTemplateService.getMicroTemplateTokens()) {
        let interpolation = null;
        if (
            token.type === "MicroTemplateEvaluate" ||
            isIntersects(token, stripedRanges)
        ) {
            interpolation = "/*SCRIPTLET*/";
        } else {
            const interpolationCode = scriptCode.slice(...token.range);

            const suffix = hash(interpolationCode.replace(/\s/gu, ""));
            interpolation = `_INTERPOLATION_${suffix}`;
        }

        const templateCode = template.slice(nextStart, token.range[0]);
        code += templateCode + interpolation;
        locMap.applyEq(templateCode.length);
        locMap.applyIns(interpolation.length);
        locMap.applyDel(token.range[1] - token.range[0]);

        nextStart = token.range[1];
    }
    const templateCode = template.slice(nextStart);
    locMap.applyEq(templateCode.length);
    locMap.flush();
    code += templateCode;

    const locationCalculator = new LocationCalculator(
        locMap,
        microTemplateService,
    );
    return {
        code,
        locationCalculator,
    };
};