@terrazzo/parser/dist/lint/plugin-core/rules/valid-number.js

Parser/validator for the Design Tokens Community Group (DTCG) standard.

import { getObjMember } from '@terrazzo/json-schema-tools';
import { isAlias } from '@terrazzo/token-tools';
import { docsLink } from '../lib/docs.js';
export const VALID_NUMBER = 'core/valid-number';
const ERROR_NAN = 'ERROR_NAN';
const rule = {
    meta: {
        messages: {
            [ERROR_NAN]: 'Must be a number.',
        },
        docs: {
            description: 'Require number tokens to follow the format.',
            url: docsLink(VALID_NUMBER),
        },
    },
    defaultOptions: {},
    create({ tokens, report }) {
        for (const token of Object.values(tokens)) {
            if (token.aliasOf || !token.originalValue) {
                continue;
            }
            switch (token.$type) {
                case 'number': {
                    validateNumber(token.originalValue.$value, {
                        filename: token.source.filename,
                        node: getObjMember(token.source.node, '$value'),
                        report,
                    });
                    break;
                }
                // Note: gradient not needed, validated in gradient
                case 'typography': {
                    const $valueNode = getObjMember(token.source.node, '$value');
                    if (typeof token.originalValue.$value === 'object' &&
                        token.originalValue.$value.lineHeight &&
                        !isAlias(token.originalValue.$value.lineHeight) &&
                        typeof token.originalValue.$value.lineHeight !== 'object') {
                        validateNumber(token.originalValue.$value.lineHeight, {
                            filename: token.source.filename,
                            node: getObjMember($valueNode, 'lineHeight'),
                            report,
                        });
                    }
                }
            }
        }
    },
};
function validateNumber(value, { node, filename, report, }) {
    if (typeof value !== 'number' || Number.isNaN(value)) {
        report({ filename, messageId: ERROR_NAN, node });
    }
}
export default rule;
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