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Support for buffers #55

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Support for buffers #55

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82 changes: 46 additions & 36 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@ See the accompanying LICENSE file for terms.

// Generate an internal UID to make the regexp pattern harder to guess.
var UID = Math.floor(Math.random() * 0x10000000000).toString(16);
var PLACE_HOLDER_REGEXP = new RegExp('"@__(F|R|D|M|S)-' + UID + '-(\\d+)__@"', 'g');
var PLACE_HOLDER_REGEXP = new RegExp('"@__(F|R|D|M|S|B)-' + UID + '-(\\d+)__@"', 'g');

var IS_NATIVE_CODE_REGEXP = /\{\s*\[native code\]\s*\}/g;
var IS_PURE_FUNCTION = /function.*?\(/;
Expand Down Expand Up @@ -44,6 +44,7 @@ module.exports = function serialize(obj, options) {
var dates = [];
var maps = [];
var sets = [];
var buffers = [];

// Returns placeholders for functions and regexps (identified by index)
// which are later replaced by their string representation.
Expand Down Expand Up @@ -73,6 +74,10 @@ module.exports = function serialize(obj, options) {
if(origValue instanceof Set) {
return '@__S-' + UID + '-' + (sets.push(origValue) - 1) + '__@';
}

if (origValue instanceof Buffer) {
return '@__B-' + UID + '-' + (buffers.push(origValue) - 1) + '__@';
}
}

if (type === 'function') {
Expand All @@ -83,40 +88,40 @@ module.exports = function serialize(obj, options) {
}

function serializeFunc(fn) {
var serializedFn = fn.toString();
if (IS_NATIVE_CODE_REGEXP.test(serializedFn)) {
throw new TypeError('Serializing native function: ' + fn.name);
}

// pure functions, example: {key: function() {}}
if(IS_PURE_FUNCTION.test(serializedFn)) {
return serializedFn;
}

// arrow functions, example: arg1 => arg1+5
if(IS_ARROW_FUNCTION.test(serializedFn)) {
return serializedFn;
}

var argsStartsAt = serializedFn.indexOf('(');
var def = serializedFn.substr(0, argsStartsAt)
.trim()
.split(' ')
.filter(function(val) { return val.length > 0 });

var nonReservedSymbols = def.filter(function(val) {
return RESERVED_SYMBOLS.indexOf(val) === -1
});

// enhanced literal objects, example: {key() {}}
if(nonReservedSymbols.length > 0) {
return (def.indexOf('async') > -1 ? 'async ' : '') + 'function'
+ (def.join('').indexOf('*') > -1 ? '*' : '')
+ serializedFn.substr(argsStartsAt);
}

// arrow functions
return serializedFn;
var serializedFn = fn.toString();
if (IS_NATIVE_CODE_REGEXP.test(serializedFn)) {
throw new TypeError('Serializing native function: ' + fn.name);
}

// pure functions, example: {key: function() {}}
if(IS_PURE_FUNCTION.test(serializedFn)) {
return serializedFn;
}

// arrow functions, example: arg1 => arg1+5
if(IS_ARROW_FUNCTION.test(serializedFn)) {
return serializedFn;
}

var argsStartsAt = serializedFn.indexOf('(');
var def = serializedFn.substr(0, argsStartsAt)
.trim()
.split(' ')
.filter(function(val) { return val.length > 0 });

var nonReservedSymbols = def.filter(function(val) {
return RESERVED_SYMBOLS.indexOf(val) === -1
});

// enhanced literal objects, example: {key() {}}
if(nonReservedSymbols.length > 0) {
return (def.indexOf('async') > -1 ? 'async ' : '') + 'function'
+ (def.join('').indexOf('*') > -1 ? '*' : '')
+ serializedFn.substr(argsStartsAt);
}

// arrow functions
return serializedFn;
}

var str;
Expand All @@ -142,7 +147,7 @@ module.exports = function serialize(obj, options) {
str = str.replace(UNSAFE_CHARS_REGEXP, escapeUnsafeChars);
}

if (functions.length === 0 && regexps.length === 0 && dates.length === 0 && maps.length === 0 && sets.length === 0) {
if (functions.length === 0 && regexps.length === 0 && dates.length === 0 && maps.length === 0 && sets.length === 0 && buffers.length === 0) {
return str;
}

Expand All @@ -166,6 +171,11 @@ module.exports = function serialize(obj, options) {
return "new Set(" + serialize(Array.from(sets[valueIndex].values()), options) + ")";
}

if (type === 'B') {
return "Buffer.from(" + serialize(Array.from(buffers[valueIndex].values()), options) + ")";
}


var fn = functions[valueIndex];

return serializeFunc(fn);
Expand Down