Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Switch to a class #33

Merged
merged 1 commit into from
Apr 24, 2023
Merged

Switch to a class #33

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
220 changes: 111 additions & 109 deletions index.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -6,135 +6,137 @@ function isObject(str) {
return typeof str === 'object' && !Array.isArray(str) && str !== null;
}

/**
* @param {Object} options - Options to configure parser
* @param {Object} options.parser - An object with a parse method that returns an AST
*/
module.exports = function(options = {}) {
this.parser = options.parser || parser;

if (options.parser) {
// We don't want to send that down to the actual parser
delete options.parser;
}
module.exports = class NodeSourceWalk {
/**
* @param {Object} options - Options to configure parser
* @param {Object} options.parser - An object with a parse method that returns an AST
*/
constructor(options = {}) {
this.parser = options.parser || parser;

if (options.parser) {
// We don't want to send that down to the actual parser
delete options.parser;
}

this.options = {
plugins: [
'jsx',
'flow',
'asyncGenerators',
'classProperties',
'doExpressions',
'dynamicImport',
'exportDefaultFrom',
'exportNamespaceFrom',
'functionBind',
'functionSent',
'nullishCoalescingOperator',
'objectRestSpread',
[
'decorators', {
decoratorsBeforeExport: true
}
this.options = {
plugins: [
'jsx',
'flow',
'asyncGenerators',
'classProperties',
'doExpressions',
'dynamicImport',
'exportDefaultFrom',
'exportNamespaceFrom',
'functionBind',
'functionSent',
'nullishCoalescingOperator',
'objectRestSpread',
[
'decorators', {
decoratorsBeforeExport: true
}
],
'optionalChaining'
],
'optionalChaining'
],
allowHashBang: true,
sourceType: 'module',
...options
};

// We use global state to stop the recursive traversal of the AST
this.shouldStop = false;
};
allowHashBang: true,
sourceType: 'module',
...options
};

/**
* @param {String} src
* @param {Object} [options] - Parser options
* @return {Object} The AST of the given src
*/
module.exports.prototype.parse = function(src, options) {
options = options || this.options;

// Keep around for consumers of parse that supply their own options
if (typeof options.allowHashBang === 'undefined') {
options.allowHashBang = true;
// We use global state to stop the recursive traversal of the AST
this.shouldStop = false;
}

return this.parser.parse(src, options);
};

/**
* Adapted from substack/node-detective
* Executes cb on a non-array AST node
*/
module.exports.prototype.traverse = function(node, cb) {
if (this.shouldStop) return;

if (Array.isArray(node)) {
for (const key of node) {
if (isObject(key)) {
// Mark that the node has been visited
key.parent = node;
this.traverse(key, cb);
}
/**
* @param {String} src
* @param {Object} [options] - Parser options
* @return {Object} The AST of the given src
*/
parse(src, options) {
options = options || this.options;

// Keep around for consumers of parse that supply their own options
if (typeof options.allowHashBang === 'undefined') {
options.allowHashBang = true;
}
} else if (node && isObject(node)) {
cb(node);

for (const [key, value] of Object.entries(node)) {
// Avoid visited nodes
if (key === 'parent' || !value) continue;
return this.parser.parse(src, options);
}

if (isObject(value)) {
value.parent = node;
/**
* Adapted from substack/node-detective
* Executes cb on a non-array AST node
*/
traverse(node, cb) {
if (this.shouldStop) return;

if (Array.isArray(node)) {
for (const key of node) {
if (isObject(key)) {
// Mark that the node has been visited
key.parent = node;
this.traverse(key, cb);
}
}
} else if (node && isObject(node)) {
cb(node);

for (const [key, value] of Object.entries(node)) {
// Avoid visited nodes
if (key === 'parent' || !value) continue;

this.traverse(value, cb);
if (isObject(value)) {
value.parent = node;
}

this.traverse(value, cb);
}
}
}
};

/**
* Executes the passed callback for every traversed node of
* the passed in src's ast
*
* @param {String|Object} src - The source code or AST to traverse
* @param {Function} cb - Called for every node
*/
module.exports.prototype.walk = function(src, cb) {
this.shouldStop = false;

const ast = isObject(src) ? src : this.parse(src);
/**
* Executes the passed callback for every traversed node of
* the passed in src's ast
*
* @param {String|Object} src - The source code or AST to traverse
* @param {Function} cb - Called for every node
*/
walk(src, cb) {
this.shouldStop = false;

this.traverse(ast, cb);
};
const ast = isObject(src) ? src : this.parse(src);

module.exports.prototype.moonwalk = function(node, cb) {
this.shouldStop = false;
this.traverse(ast, cb);
}

if (!isObject(node)) throw new Error('node must be an object');
moonwalk(node, cb) {
this.shouldStop = false;

reverseTraverse.call(this, node, cb);
};
if (!isObject(node)) throw new Error('node must be an object');

function reverseTraverse(node, cb) {
if (this.shouldStop || !node.parent) return;
this._reverseTraverse(node, cb);
}

if (Array.isArray(node.parent)) {
for (const parent of node.parent) {
cb(parent);
}
} else {
cb(node.parent);
/**
* Halts further traversal of the AST
*/
stopWalking() {
this.shouldStop = true;
}

reverseTraverse.call(this, node.parent, cb);
}
_reverseTraverse(node, cb) {
if (this.shouldStop || !node.parent) return;

if (Array.isArray(node.parent)) {
for (const parent of node.parent) {
cb(parent);
}
} else {
cb(node.parent);
}

/**
* Halts further traversal of the AST
*/
module.exports.prototype.stopWalking = function() {
this.shouldStop = true;
this._reverseTraverse(node.parent, cb);
}
};