node_modules/eslint-plugin-lit/lib/rules/attribute-value-entities.js

/**
 * @fileoverview Disallows unencoded HTML entities in attribute values
 * @author James Garbutt <https://github.com/43081j>
 */
import { TemplateAnalyzer } from '../template-analyzer.js';
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
export const rule = {
    meta: {
        docs: {
            description: 'Disallows unencoded HTML entities in attribute values',
            recommended: false,
            url: 'https://github.com/43081j/eslint-plugin-lit/blob/master/docs/rules/attribute-value-entities.md'
        },
        schema: [],
        messages: {
            unencoded: 'Attribute values may not contain unencoded HTML ' +
                'entities, e.g. use `&gt;` instead of `>`',
            doubleQuotes: 'Attributes delimited by double quotes may not contain ' +
                'unencoded double quotes (e.g. `attr="bad"quote"`)',
            singleQuotes: 'Attributes delimited by single quotes may not contain ' +
                "unencoded single quotes (e.g. `attr='bad'quote'`)"
        }
    },
    create(context) {
        const source = context.getSourceCode();
        const disallowedPattern = /([<>]|&(?!(#\d+|[a-z]+);))/;
        //----------------------------------------------------------------------
        // Helpers
        //----------------------------------------------------------------------
        //----------------------------------------------------------------------
        // Public
        //----------------------------------------------------------------------
        return {
            TaggedTemplateExpression: (node) => {
                if (node.type === 'TaggedTemplateExpression' &&
                    node.tag.type === 'Identifier' &&
                    node.tag.name === 'html') {
                    const analyzer = TemplateAnalyzer.create(node);
                    analyzer.traverse({
                        enterElement: (element) => {
                            var _a, _b, _c, _d;
                            // eslint-disable-next-line guard-for-in
                            for (const attr in element.attribs) {
                                const loc = analyzer.getLocationForAttribute(element, attr, source);
                                const rawValue = analyzer.getRawAttributeValue(element, attr);
                                if (!loc || !(rawValue === null || rawValue === void 0 ? void 0 : rawValue.value)) {
                                    continue;
                                }
                                if (disallowedPattern.test(rawValue.value)) {
                                    context.report({
                                        loc: loc,
                                        messageId: 'unencoded'
                                    });
                                }
                                else if (((_a = rawValue.quotedValue) === null || _a === void 0 ? void 0 : _a.startsWith('"')) &&
                                    ((_b = rawValue.value) === null || _b === void 0 ? void 0 : _b.includes('"'))) {
                                    context.report({
                                        loc: loc,
                                        messageId: 'doubleQuotes'
                                    });
                                }
                                else if (((_c = rawValue.quotedValue) === null || _c === void 0 ? void 0 : _c.startsWith("'")) &&
                                    ((_d = rawValue.value) === null || _d === void 0 ? void 0 : _d.includes("'"))) {
                                    context.report({
                                        loc: loc,
                                        messageId: 'singleQuotes'
                                    });
                                }
                            }
                        }
                    });
                }
            }
        };
    }
};