css-conflict-inspector/lib/analyze.js

Find potential conflict in your CSS files - to avoid surprises when used in the context of Micro Frontends.

"use strict";
var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.analyzeCss = void 0;
var lightningcss_1 = require("lightningcss");
var inspect_1 = require("./inspect");
var stringify_1 = require("./stringify");
function sum(penalties) {
    return Math.ceil(penalties.reduce(function (s, p) { return s + p; }, 0));
}
function analyzeCss(content, options) {
    if (options === void 0) { options = {}; }
    var conflicts = [];
    var selectors = [];
    var result = (0, lightningcss_1.transform)({
        code: Buffer.from(content, 'utf8'),
        filename: 'style.css',
        analyzeDependencies: true,
        errorRecovery: true,
        visitor: {
            Selector: function (selector) {
                var violations = [];
                (0, inspect_1.inspect)(selector, violations, options);
                var conflict = violations
                    .filter(function (v) { return v.penalty; })
                    .reduce(function (p, c) {
                    if (p && p.penalty < c.penalty) {
                        return __assign(__assign({}, c), { penalty: p.penalty });
                    }
                    return c;
                }, undefined);
                if (conflict) {
                    conflicts.push(conflict);
                }
                selectors.push((0, stringify_1.stringify)(selector));
            },
        },
    });
    var penalties = conflicts.map(function (c) { return c.penalty; });
    var totalPenalty = sum(penalties);
    var topThree = penalties.sort(function (a, b) { return b - a; }).filter(function (_, i) { return i < 3; });
    var maxPenalty = Math.ceil(conflicts.reduce(function (p, c) { return Math.max(p, c.penalty); }, 0));
    var score = Math.max(0, 100 - sum(topThree));
    return {
        selectors: selectors,
        conflicts: conflicts,
        warnings: result.warnings,
        dependencies: result.dependencies,
        totalPenalty: totalPenalty,
        maxPenalty: maxPenalty,
        score: score,
    };
}
exports.analyzeCss = analyzeCss;
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