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/** @import { ComponentContext } from '../types' */
import { build_getter, is_prop_source } from '../utils.js';
import * as b from '../../../../utils/builders.js';
import { add_state_transformers } from './shared/declarations.js';
/**
* @param {Program} _
* @param {ComponentContext} context
*/
export function Program(_, context) {
if (!context.state.analysis.runes) {
context.state.transform['$$props'] = {
read: (node) => ({ ...node, name: '$$sanitized_props' })
};
for (const [name, binding] of context.state.scope.declarations) {
if (binding.declaration_kind === 'import' && binding.mutated) {
// the declaration itself is hoisted to the module scope, so we need
// to resort to cruder measures to differentiate instance/module imports
const { start, end } = context.state.analysis.instance.ast;
const node = /** @type {ImportDeclaration} */ (binding.initial);
const is_instance_import =
/** @type {number} */ (node.start) > /** @type {number} */ (start) &&
/** @type {number} */ (node.end) < /** @type {number} */ (end);
if (is_instance_import) {
const id = b.id('$$_import_' + name);
context.state.transform[name] = {
read: (_) => b.call(id),
mutate: (_, mutation) => b.call(id, mutation)
};
context.state.legacy_reactive_imports.push(
b.var(id, b.call('$.reactive_import', b.thunk(b.id(name))))
);
}
}
}
}
for (const [name, binding] of context.state.scope.declarations) {
if (binding.kind === 'store_sub') {
// read lazily, so that transforms added later are still applied
/** @type {Expression} */
let cached;
const get_store = () => {
return (cached ??= /** @type {Expression} */ (context.visit(b.id(name.slice(1)))));
};
context.state.transform[name] = {
read: b.call,
assign: (_, value) => b.call('$.store_set', get_store(), value),
mutate: (node, mutation) => {
// We need to untrack the store read, for consistency with Svelte 4
const untracked = b.call('$.untrack', node);
/**
*
* @param {Expression} n
* @returns {Expression}
*/
function replace(n) {
if (n.type === 'MemberExpression') {
return {
...n,
object: replace(/** @type {Expression} */ (n.object)),
property: n.property
};
}
return untracked;
}
return b.call(
'$.store_mutate',
get_store(),
b.assignment(
mutation.operator,
/** @type {MemberExpression} */ (
replace(/** @type {MemberExpression} */ (mutation.left))
),
mutation.right
),
untracked
);
},
update: (node) => {
return b.call(
node.prefix ? '$.update_pre_store' : '$.update_store',
build_getter(b.id(name.slice(1)), context.state),
b.call(node.argument),
node.operator === '--' && b.literal(-1)
);
}
};
}
if (binding.kind === 'prop' || binding.kind === 'bindable_prop') {
if (is_prop_source(binding, context.state)) {
context.state.transform[name] = {
read: b.call,
assign: (node, value) => b.call(node, value),
mutate: (node, value) => {
if (binding.kind === 'bindable_prop') {
// only necessary for interop with legacy parent bindings
return b.call(node, value, b.true);
}
return value;
},
update: (node) => {
return b.call(
node.prefix ? '$.update_pre_prop' : '$.update_prop',
node.argument,
node.operator === '--' && b.literal(-1)
);
}
};
} else if (binding.prop_alias) {
const key = b.key(binding.prop_alias);
context.state.transform[name] = {
read: (_) => b.member(b.id('$$props'), key, key.type === 'Literal')
};
} else {
context.state.transform[name] = {
read: (node) => b.member(b.id('$$props'), node)
};
}
}
}
add_state_transformers(context);
context.next();
}
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