85 lines
2.8 KiB
JavaScript
85 lines
2.8 KiB
JavaScript
|
var json = typeof JSON !== 'undefined' ? JSON : require('jsonify');
|
||
|
|
|
||
|
|
module.exports = function (obj, opts) {
|
||
|
|
if (!opts) opts = {};
|
||
|
|
if (typeof opts === 'function') opts = { cmp: opts };
|
||
|
|
var space = opts.space || '';
|
||
|
|
if (typeof space === 'number') space = Array(space+1).join(' ');
|
||
|
|
var cycles = (typeof opts.cycles === 'boolean') ? opts.cycles : false;
|
||
|
|
var replacer = opts.replacer || function(key, value) { return value; };
|
||
|
|
|
||
|
|
var cmp = opts.cmp && (function (f) {
|
||
|
|
return function (node) {
|
||
|
|
return function (a, b) {
|
||
|
|
var aobj = { key: a, value: node[a] };
|
||
|
|
var bobj = { key: b, value: node[b] };
|
||
|
|
return f(aobj, bobj);
|
||
|
|
};
|
||
|
|
};
|
||
|
|
})(opts.cmp);
|
||
|
|
|
||
|
|
var seen = [];
|
||
|
|
return (function stringify (parent, key, node, level) {
|
||
|
|
var indent = space ? ('\n' + new Array(level + 1).join(space)) : '';
|
||
|
|
var colonSeparator = space ? ': ' : ':';
|
||
|
|
|
||
|
|
if (node && node.toJSON && typeof node.toJSON === 'function') {
|
||
|
|
node = node.toJSON();
|
||
|
|
}
|
||
|
|
|
||
|
|
node = replacer.call(parent, key, node);
|
||
|
|
|
||
|
|
if (node === undefined) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (typeof node !== 'object' || node === null) {
|
||
|
|
return json.stringify(node);
|
||
|
|
}
|
||
|
|
if (isArray(node)) {
|
||
|
|
var out = [];
|
||
|
|
for (var i = 0; i < node.length; i++) {
|
||
|
|
var item = stringify(node, i, node[i], level+1) || json.stringify(null);
|
||
|
|
out.push(indent + space + item);
|
||
|
|
}
|
||
|
|
return '[' + out.join(',') + indent + ']';
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (seen.indexOf(node) !== -1) {
|
||
|
|
if (cycles) return json.stringify('__cycle__');
|
||
|
|
throw new TypeError('Converting circular structure to JSON');
|
||
|
|
}
|
||
|
|
else seen.push(node);
|
||
|
|
|
||
|
|
var keys = objectKeys(node).sort(cmp && cmp(node));
|
||
|
|
var out = [];
|
||
|
|
for (var i = 0; i < keys.length; i++) {
|
||
|
|
var key = keys[i];
|
||
|
|
var value = stringify(node, key, node[key], level+1);
|
||
|
|
|
||
|
|
if(!value) continue;
|
||
|
|
|
||
|
|
var keyValue = json.stringify(key)
|
||
|
|
+ colonSeparator
|
||
|
|
+ value;
|
||
|
|
;
|
||
|
|
out.push(indent + space + keyValue);
|
||
|
|
}
|
||
|
|
seen.splice(seen.indexOf(node), 1);
|
||
|
|
return '{' + out.join(',') + indent + '}';
|
||
|
|
}
|
||
|
|
})({ '': obj }, '', obj, 0);
|
||
|
|
};
|
||
|
|
|
||
|
|
var isArray = Array.isArray || function (x) {
|
||
|
|
return {}.toString.call(x) === '[object Array]';
|
||
|
|
};
|
||
|
|
|
||
|
|
var objectKeys = Object.keys || function (obj) {
|
||
|
|
var has = Object.prototype.hasOwnProperty || function () { return true };
|
||
|
|
var keys = [];
|
||
|
|
for (var key in obj) {
|
||
|
|
if (has.call(obj, key)) keys.push(key);
|
||
|
|
}
|
||
|
|
return keys;
|
||
|
|
};
|