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/** @import { AST } from '#compiler' */
import { NAMESPACE_MATHML, NAMESPACE_SVG } from '../../../../constants.js';
import * as e from '../../../errors.js';
const regex_valid_tag_name = /^[a-zA-Z][a-zA-Z0-9]*-[a-zA-Z0-9-]+$/;
/**
* @param {AST.SvelteOptionsRaw} node
* @returns {AST.Root['options']}
*/
export default function read_options(node) {
/** @type {AST.SvelteOptions} */
const component_options = {
start: node.start,
end: node.end,
// @ts-ignore
attributes: node.attributes
};
if (!node) {
return component_options;
}
for (const attribute of node.attributes) {
if (attribute.type !== 'Attribute') {
e.svelte_options_invalid_attribute(attribute);
}
const { name } = attribute;
switch (name) {
case 'runes': {
component_options.runes = get_boolean_value(attribute);
break;
}
case 'tag': {
e.svelte_options_deprecated_tag(attribute);
break; // eslint doesn't know this is unnecessary
}
case 'customElement': {
/** @type {AST.SvelteOptions['customElement']} */
const ce = {};
const { value: v } = attribute;
const value = v === true || Array.isArray(v) ? v : [v];
if (value === true) {
e.svelte_options_invalid_customelement(attribute);
} else if (value[0].type === 'Text') {
const tag = get_static_value(attribute);
validate_tag(attribute, tag);
ce.tag = tag;
component_options.customElement = ce;
break;
} else if (value[0].expression.type !== 'ObjectExpression') {
// Before Svelte 4 it was necessary to explicitly set customElement to null or else you'd get a warning.
// This is no longer necessary, but for backwards compat just skip in this case now.
if (value[0].expression.type === 'Literal' && value[0].expression.value === null) {
break;
}
e.svelte_options_invalid_customelement(attribute);
}
/** @type {Array<[string, any]>} */
const properties = [];
for (const property of value[0].expression.properties) {
if (
property.type !== 'Property' ||
property.computed ||
property.key.type !== 'Identifier'
) {
e.svelte_options_invalid_customelement(attribute);
}
properties.push([property.key.name, property.value]);
}
const tag = properties.find(([name]) => name === 'tag');
if (tag) {
const tag_value = tag[1]?.value;
validate_tag(tag, tag_value);
ce.tag = tag_value;
}
const props = properties.find(([name]) => name === 'props')?.[1];
if (props) {
if (props.type !== 'ObjectExpression') {
e.svelte_options_invalid_customelement_props(attribute);
}
ce.props = {};
for (const property of /** @type {ObjectExpression} */ (props).properties) {
if (
property.type !== 'Property' ||
property.computed ||
property.key.type !== 'Identifier' ||
property.value.type !== 'ObjectExpression'
) {
e.svelte_options_invalid_customelement_props(attribute);
}
ce.props[property.key.name] = {};
for (const prop of property.value.properties) {
if (
prop.type !== 'Property' ||
prop.computed ||
prop.key.type !== 'Identifier' ||
prop.value.type !== 'Literal'
) {
e.svelte_options_invalid_customelement_props(attribute);
}
if (prop.key.name === 'type') {
if (
['String', 'Number', 'Boolean', 'Array', 'Object'].indexOf(
/** @type {string} */ (prop.value.value)
) === -1
) {
e.svelte_options_invalid_customelement_props(attribute);
}
ce.props[property.key.name].type = /** @type {any} */ (prop.value.value);
} else if (prop.key.name === 'reflect') {
if (typeof prop.value.value !== 'boolean') {
e.svelte_options_invalid_customelement_props(attribute);
}
ce.props[property.key.name].reflect = prop.value.value;
} else if (prop.key.name === 'attribute') {
if (typeof prop.value.value !== 'string') {
e.svelte_options_invalid_customelement_props(attribute);
}
ce.props[property.key.name].attribute = prop.value.value;
} else {
e.svelte_options_invalid_customelement_props(attribute);
}
}
}
}
const shadow = properties.find(([name]) => name === 'shadow')?.[1];
if (shadow) {
const shadowdom = shadow?.value;
if (shadowdom !== 'open' && shadowdom !== 'none') {
e.svelte_options_invalid_customelement_shadow(shadow);
}
ce.shadow = shadowdom;
}
const extend = properties.find(([name]) => name === 'extend')?.[1];
if (extend) {
ce.extend = extend;
}
component_options.customElement = ce;
break;
}
case 'namespace': {
const value = get_static_value(attribute);
if (value === NAMESPACE_SVG) {
component_options.namespace = 'svg';
} else if (value === NAMESPACE_MATHML) {
component_options.namespace = 'mathml';
} else if (value === 'html' || value === 'mathml' || value === 'svg') {
component_options.namespace = value;
} else {
e.svelte_options_invalid_attribute_value(attribute, `"html", "mathml" or "svg"`);
}
break;
}
case 'css': {
const value = get_static_value(attribute);
if (value === 'injected') {
component_options.css = value;
} else {
e.svelte_options_invalid_attribute_value(attribute, `"injected"`);
}
break;
}
case 'immutable': {
component_options.immutable = get_boolean_value(attribute);
break;
}
case 'preserveWhitespace': {
component_options.preserveWhitespace = get_boolean_value(attribute);
break;
}
case 'accessors': {
component_options.accessors = get_boolean_value(attribute);
break;
}
default:
e.svelte_options_unknown_attribute(attribute, name);
}
}
return component_options;
}
/**
* @param {any} attribute
*/
function get_static_value(attribute) {
const { value } = attribute;
if (value === true) return true;
const chunk = Array.isArray(value) ? value[0] : value;
if (!chunk) return true;
if (value.length > 1) {
return null;
}
if (chunk.type === 'Text') return chunk.data;
if (chunk.expression.type !== 'Literal') {
return null;
}
return chunk.expression.value;
}
/**
* @param {any} attribute
*/
function get_boolean_value(attribute) {
const value = get_static_value(attribute);
if (typeof value !== 'boolean') {
e.svelte_options_invalid_attribute_value(attribute, 'true or false');
}
return value;
}
/**
* @param {any} attribute
* @param {string | null} tag
* @returns {asserts tag is string}
*/
function validate_tag(attribute, tag) {
if (typeof tag !== 'string') {
e.svelte_options_invalid_tagname(attribute);
}
if (tag && !regex_valid_tag_name.test(tag)) {
e.svelte_options_invalid_tagname(attribute);
}
}
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