twitst4tz

twitter statistics web application
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index.js (1845B)


      1 'use strict';
      2 
      3 module.exports = function (data, opts) {
      4     if (!opts) opts = {};
      5     if (typeof opts === 'function') opts = { cmp: opts };
      6     var cycles = (typeof opts.cycles === 'boolean') ? opts.cycles : false;
      7 
      8     var cmp = opts.cmp && (function (f) {
      9         return function (node) {
     10             return function (a, b) {
     11                 var aobj = { key: a, value: node[a] };
     12                 var bobj = { key: b, value: node[b] };
     13                 return f(aobj, bobj);
     14             };
     15         };
     16     })(opts.cmp);
     17 
     18     var seen = [];
     19     return (function stringify (node) {
     20         if (node && node.toJSON && typeof node.toJSON === 'function') {
     21             node = node.toJSON();
     22         }
     23 
     24         if (node === undefined) return;
     25         if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
     26         if (typeof node !== 'object') return JSON.stringify(node);
     27 
     28         var i, out;
     29         if (Array.isArray(node)) {
     30             out = '[';
     31             for (i = 0; i < node.length; i++) {
     32                 if (i) out += ',';
     33                 out += stringify(node[i]) || 'null';
     34             }
     35             return out + ']';
     36         }
     37 
     38         if (node === null) return 'null';
     39 
     40         if (seen.indexOf(node) !== -1) {
     41             if (cycles) return JSON.stringify('__cycle__');
     42             throw new TypeError('Converting circular structure to JSON');
     43         }
     44 
     45         var seenIndex = seen.push(node) - 1;
     46         var keys = Object.keys(node).sort(cmp && cmp(node));
     47         out = '';
     48         for (i = 0; i < keys.length; i++) {
     49             var key = keys[i];
     50             var value = stringify(node[key]);
     51 
     52             if (!value) continue;
     53             if (out) out += ',';
     54             out += JSON.stringify(key) + ':' + value;
     55         }
     56         seen.splice(seenIndex, 1);
     57         return '{' + out + '}';
     58     })(data);
     59 };