json-canonicalize
Version:
JSON canonicalize function
115 lines • 4.59 kB
JavaScript
var CircularRootPathName = '$';
export function _serialize(obj, options) {
var buffer = '';
var vInclude = options && options.include;
var vExclude = options && options.exclude;
if (vExclude) {
if (typeof vExclude === 'string')
vExclude = [vExclude];
}
if (vInclude)
vInclude.sort();
var visited = new WeakMap();
var allowCircular = options && options.allowCircular;
var filterUndefined = options && options.filterUndefined;
var undefinedInArrayToNull = options && options.undefinedInArrayToNull;
serialize(obj, CircularRootPathName);
return buffer;
function serialize(object, path) {
if (object === null ||
typeof object !== 'object' ||
object.toJSON != null) {
/////////////////////////////////////////////////
// Primitive data type - Use ES6/JSON //
/////////////////////////////////////////////////
buffer += JSON.stringify(object);
}
else if (Array.isArray(object)) {
/////////////////////////////////////////////////
// Array - Maintain element order //
/////////////////////////////////////////////////
var visitedPath = visited.get(object);
if (visitedPath !== undefined) {
if (path.startsWith(visitedPath)) {
if (!allowCircular) {
throw new Error('Circular reference detected');
}
buffer += '"[Circular:' + visitedPath + ']"';
return;
}
}
visited.set(object, path);
buffer += '[';
var next_1 = false;
object.forEach(function (element, index) {
if (next_1) {
buffer += ',';
}
next_1 = true;
if (undefinedInArrayToNull && element === undefined) {
element = null;
}
/////////////////////////////////////////
// Array element - Recursive expansion //
/////////////////////////////////////////
serialize(element, path + "[" + index + "]");
});
buffer += ']';
}
else {
/////////////////////////////////////////////////
// Object - Sort properties before serializing //
/////////////////////////////////////////////////
var visitedPath = visited.get(object);
if (visitedPath !== undefined) {
if (path.startsWith(visitedPath)) {
if (!allowCircular) {
throw new Error('Circular reference detected');
}
buffer += '"[Circular:' + visitedPath + ']"';
return;
}
}
visited.set(object, path);
buffer += '{';
var next_2 = false;
var addProp_1 = function (property) {
if (vExclude && vExclude.includes(property)) {
return;
}
if (next_2) {
buffer += ',';
}
next_2 = true;
///////////////////////////////////////////////
// Property names are strings - Use ES6/JSON //
///////////////////////////////////////////////
buffer += JSON.stringify(property);
buffer += ':';
//////////////////////////////////////////
// Property value - Recursive expansion //
//////////////////////////////////////////
serialize(object[property], path + "." + property);
};
if (path === CircularRootPathName && vInclude) {
vInclude.forEach(function (property) {
if (object.hasOwnProperty(property)) {
addProp_1(property);
}
});
}
else {
var vKeys = Object.keys(object);
if (filterUndefined) {
vKeys = vKeys.filter(function (k) { return object[k] !== undefined; });
}
vKeys.sort();
vKeys.forEach(function (property) {
addProp_1(property);
});
}
buffer += '}';
}
}
}
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