myst-parser/dist/utils.js

Markdown parser for MyST markdown in JavaScript

import { fileError, fileWarn, ParseTypesEnum } from 'myst-common';
export function contentFromNode(node, spec, vfile, description, ruleId) {
    const { children, value } = node;
    if (spec.type === ParseTypesEnum.parsed || spec.type === 'myst') {
        if (typeof value !== 'string') {
            fileWarn(vfile, `content is parsed from non-string value for ${description}`, {
                node,
                ruleId,
            });
        }
        if (!(children === null || children === void 0 ? void 0 : children.length)) {
            if (spec.required) {
                fileError(vfile, `no parsed content for required ${description}`, { node, ruleId });
            }
            return undefined;
        }
        return children;
    }
    if (value == null) {
        if (spec.required) {
            fileError(vfile, `no content for required ${description}`, { node, ruleId });
        }
        return undefined;
    }
    if (spec.type === ParseTypesEnum.string || spec.type === String) {
        if (value === true)
            return '';
        // silently transform numbers into strings here
        if (typeof value !== 'string' && !(value && typeof value === 'number' && !isNaN(value))) {
            fileWarn(vfile, `value is not a string for ${description}`, { node, ruleId });
        }
        return String(value);
    }
    if (spec.type === ParseTypesEnum.number || spec.type === Number) {
        const valueAsNumber = Number(value);
        if (value === true || isNaN(valueAsNumber)) {
            const fileFn = spec.required ? fileError : fileWarn;
            fileFn(vfile, `number not provided for ${description}`, { node, ruleId });
            return undefined;
        }
        return valueAsNumber;
    }
    if (spec.type === ParseTypesEnum.boolean || spec.type === Boolean) {
        if (typeof value === 'string') {
            if (value.toLowerCase() === 'false')
                return false;
            if (value.toLowerCase() === 'true')
                return true;
        }
        if (typeof value !== 'boolean') {
            fileWarn(vfile, `value is not a boolean for ${description}`, { node, ruleId });
        }
        return !!value;
    }
}