@storybook/addon-svelte-csf/dist/parser/extract/svelte/define-meta.js

Allows to write stories in Svelte syntax

import { GetDefineMetaFirstArgumentError } from '../../../utils/error/parser/extract/svelte.js';
/**
 * Extract selected properties from `defineMeta` as AST node {@link Property}.
 * It works for original svelte code as well as compiled code,
 * because in both cases, the AST structure is the same _(or should be!)_.
 */
export function extractDefineMetaPropertiesNodes(options) {
    const { properties } = options;
    const objectExpression = getDefineMetaFirstArgumentObjectExpression(options);
    const results = {};
    for (const property of objectExpression.properties) {
        if (property.type === 'Property' &&
            property.key.type === 'Identifier' &&
            properties.includes(property.key.name)) {
            results[property.key.name] = property;
        }
    }
    return results;
}
/**
 * `defineMeta` accepts only one argument - an {@link ObjectExpression},
 * which should satisfy `@storybook/svelte`'s interface {@link Meta}.
 */
export function getDefineMetaFirstArgumentObjectExpression(options) {
    const { nodes, filename } = options;
    const { defineMetaVariableDeclaration, defineMetaImport } = nodes;
    const { declarations } = defineMetaVariableDeclaration;
    const declaration = declarations[0];
    const { init } = declaration;
    if (init?.type === 'CallExpression' &&
        init.callee.type === 'Identifier' &&
        init.callee.name === defineMetaImport.local.name && // NOTE: the callee.name could be renamed by user
        init.arguments.length === 1 &&
        init.arguments[0].type === 'ObjectExpression') {
        return init.arguments[0];
    }
    throw new GetDefineMetaFirstArgumentError({
        filename,
        defineMetaVariableDeclaration,
    });
}