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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.analyzeScope = analyzeScope;
exports.analyzeReactiveScope = analyzeReactiveScope;
exports.analyzeStoreScope = analyzeStoreScope;
exports.analyzePropsScope = analyzePropsScope;
exports.analyzeSnippetsScope = analyzeSnippetsScope;
const eslint_scope_1 = require("eslint-scope");
const traverse_1 = require("../traverse");
const scope_1 = require("../scope");
const utils_1 = require("../utils");
/**
* Analyze scope
*/
function analyzeScope(node, parserOptions) {
const ecmaVersion = parserOptions.ecmaVersion || 2020;
const ecmaFeatures = parserOptions.ecmaFeatures || {};
const sourceType = parserOptions.sourceType || "module";
const root = node.type === "Program"
? node
: {
type: "Program",
body: [node],
sourceType,
};
return (0, eslint_scope_1.analyze)(root, {
ignoreEval: true,
nodejsScope: false,
impliedStrict: ecmaFeatures.impliedStrict,
ecmaVersion: typeof ecmaVersion === "number" ? ecmaVersion : 2022,
sourceType,
fallback: traverse_1.getFallbackKeys,
});
}
/** Analyze reactive scope */
function analyzeReactiveScope(scopeManager) {
for (const reference of [...scopeManager.globalScope.through]) {
const parent = reference.writeExpr && getParent(reference.writeExpr);
if ((parent === null || parent === void 0 ? void 0 : parent.type) === "AssignmentExpression") {
const pp = getParent(parent);
if ((pp === null || pp === void 0 ? void 0 : pp.type) === "ExpressionStatement") {
const ppp = getParent(pp);
if ((ppp === null || ppp === void 0 ? void 0 : ppp.type) === "SvelteReactiveStatement" && ppp.label.name === "$") {
const referenceScope = reference.from;
if (referenceScope.type === "module") {
// It is computed
transformComputedVariable(parent, ppp, reference);
continue;
}
}
}
}
}
/** Transform ref to ComputedVariable */
function transformComputedVariable(node, parent, reference) {
const referenceScope = reference.from;
const name = reference.identifier.name;
let variable = referenceScope.set.get(name);
if (!variable) {
variable = new eslint_scope_1.Variable();
variable.scope = referenceScope;
variable.name = name;
(0, utils_1.addElementToSortedArray)(variable.defs, {
type: "ComputedVariable",
node: node,
parent: parent,
name: reference.identifier,
}, (a, b) => a.node.range[0] - b.node.range[0]);
(0, scope_1.addVariable)(referenceScope.variables, variable);
referenceScope.set.set(name, variable);
}
(0, utils_1.addElementToSortedArray)(variable.identifiers, reference.identifier, (a, b) => a.range[0] - b.range[0]);
reference.resolved = variable;
removeReferenceFromThrough(reference, referenceScope);
}
}
/**
* Analyze store scope. e.g. $count
*/
function analyzeStoreScope(scopeManager) {
const moduleScope = scopeManager.scopes.find((scope) => scope.type === "module");
if (!moduleScope) {
return;
}
const toBeMarkAsUsedReferences = [];
for (const reference of [...scopeManager.globalScope.through]) {
if (reference.identifier.name.startsWith("$")) {
const realName = reference.identifier.name.slice(1);
const variable = moduleScope.set.get(realName);
if (variable) {
if (reference.isWriteOnly()) {
// Need mark as used
toBeMarkAsUsedReferences.push(reference);
}
// It does not write directly to the original variable.
// Therefore, this variable is always a reference.
reference.isWrite = () => false;
reference.isWriteOnly = () => false;
reference.isReadWrite = () => false;
reference.isReadOnly = () => true;
reference.isRead = () => true;
(0, scope_1.addReference)(variable.references, reference);
reference.resolved = variable;
removeReferenceFromThrough(reference, moduleScope);
}
}
}
for (const variable of new Set(toBeMarkAsUsedReferences.map((ref) => ref.resolved))) {
if (variable.references.some((ref) => !toBeMarkAsUsedReferences.includes(ref) &&
ref.identifier !== variable.identifiers[0])) {
// It is already used.
continue;
}
// Add the virtual reference for reading.
addVirtualReference(variable.identifiers[0], variable, moduleScope, {
read: true,
}).svelteMarkAsUsed = true;
}
}
/** Transform props exports */
function analyzePropsScope(body, scopeManager, svelteParseContext) {
var _a;
const moduleScope = scopeManager.scopes.find((scope) => scope.type === "module");
if (!moduleScope) {
return;
}
for (const node of body.body) {
if (node.type === "ExportNamedDeclaration") {
// Process for Svelte v4 style props. e.g. `export let x`;
if (node.declaration) {
if (node.declaration.type === "VariableDeclaration") {
for (const decl of node.declaration.declarations) {
for (const pattern of extractPattern(decl.id)) {
if (pattern.type === "Identifier") {
addPropReference(pattern, moduleScope);
}
}
}
}
}
else {
for (const spec of node.specifiers) {
addPropReference(spec.local, moduleScope);
}
}
}
else if (node.type === "VariableDeclaration") {
if (svelteParseContext.runes) {
// Process for Svelte v5 Runes props. e.g. `let { x = $bindable() } = $props()`;
for (const decl of node.declarations) {
if (((_a = decl.init) === null || _a === void 0 ? void 0 : _a.type) === "CallExpression" &&
decl.init.callee.type === "Identifier" &&
decl.init.callee.name === "$props" &&
decl.id.type === "ObjectPattern") {
for (const pattern of extractPattern(decl.id)) {
if (pattern.type === "AssignmentPattern" &&
pattern.left.type === "Identifier" &&
pattern.right.type === "CallExpression" &&
pattern.right.callee.type === "Identifier" &&
pattern.right.callee.name === "$bindable") {
addPropReference(pattern.left, moduleScope);
}
}
}
}
}
}
}
function* extractPattern(node) {
yield node;
if (node.type === "Identifier") {
return;
}
if (node.type === "ObjectPattern") {
for (const prop of node.properties) {
if (prop.type === "Property") {
yield* extractPattern(prop.value);
}
else {
yield* extractPattern(prop);
}
}
return;
}
if (node.type === "ArrayPattern") {
for (const elem of node.elements) {
if (elem) {
yield* extractPattern(elem);
}
}
return;
}
if (node.type === "AssignmentPattern") {
yield* extractPattern(node.left);
return;
}
if (node.type === "RestElement") {
yield* extractPattern(node.argument);
}
}
/** Add virtual prop reference */
function addPropReference(node, scope) {
for (const variable of scope.variables) {
if (variable.name !== node.name) {
continue;
}
if (variable.references.some((ref) => ref.sveltePropReference)) {
continue;
}
// Add the virtual reference for writing.
const reference = addVirtualReference(Object.assign(Object.assign({}, node), {
// @ts-expect-error -- ignore
parent: body, loc: {
start: Object.assign({}, node.loc.start),
end: Object.assign({}, node.loc.end),
}, range: [...node.range] }), variable, scope, {
write: true,
read: true,
});
reference.sveltePropReference = true;
}
}
}
/** Analyze snippets in component scope */
function analyzeSnippetsScope(snippets, scopeManager) {
for (const snippet of snippets) {
const parent = snippet.parent;
if (parent.type === "SvelteElement" &&
(parent.kind === "component" ||
(parent.kind === "special" && parent.name.name === "svelte:component"))) {
const scope = (0, scope_1.getScopeFromNode)(scopeManager, snippet.id);
const upperScope = scope.upper;
if (!upperScope)
continue;
const variable = upperScope.set.get(snippet.id.name);
if (!variable)
continue;
// Add the virtual reference for reading.
const reference = addVirtualReference(snippet.id, variable, upperScope, {
read: true,
});
reference.svelteSnippetReference = true;
}
}
}
/** Remove reference from through */
function removeReferenceFromThrough(reference, baseScope) {
const variable = reference.resolved;
const name = reference.identifier.name;
let scope = baseScope;
while (scope) {
scope.through = scope.through.filter((ref) => {
if (reference === ref) {
return false;
}
else if (ref.identifier.name === name) {
ref.resolved = variable;
if (!variable.references.includes(ref)) {
(0, scope_1.addReference)(variable.references, ref);
}
return false;
}
return true;
});
scope = scope.upper;
}
}
/**
* Add the virtual reference.
*/
function addVirtualReference(node, variable, scope, readWrite) {
const reference = new eslint_scope_1.Reference();
reference.svelteVirtualReference = true;
reference.from = scope;
reference.identifier = node;
reference.isWrite = () => Boolean(readWrite.write);
reference.isWriteOnly = () => Boolean(readWrite.write) && !readWrite.read;
reference.isRead = () => Boolean(readWrite.read);
reference.isReadOnly = () => Boolean(readWrite.read) && !readWrite.write;
reference.isReadWrite = () => Boolean(readWrite.read && readWrite.write);
(0, scope_1.addReference)(variable.references, reference);
reference.resolved = variable;
return reference;
}
/** Get parent node */
function getParent(node) {
return node.parent;
}
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