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54 lines
1.4 KiB
54 lines
1.4 KiB
/**
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* Handle models (i.e. docs)
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* Serialization/deserialization
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* Copying
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*/
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var dateToJSON = function () { return { $$date: this.getTime() }; }
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, originalDateToJSON = Date.prototype.toJSON
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/**
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* Serialize an object to be persisted to a one-line string
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* Accepted primitive types: Number, String, Boolean, Date, null
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* Accepted secondary types: Objects, Arrays
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* TODO: throw an error if variable name begins with '$'
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*/
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function serialize (obj) {
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var res;
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// Keep track of the fact this is a Date object
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Date.prototype.toJSON = dateToJSON;
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res = JSON.stringify(obj, function (k, v) {
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if (typeof v === 'string' || typeof v === 'number' || typeof v === 'boolean' || v === null) { return v; }
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if (v && v.constructor && v.constructor.name === 'Date') { return { $$date: v.toString() }; }
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return v;
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});
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// Return Date to its original state
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Date.prototype.toJSON = originalDateToJSON;
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return res;
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}
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/**
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* From a one-line representation of an object generate by the serialize function
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* Return the object itself
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*/
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function deserialize (rawData) {
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return JSON.parse(rawData, function (k, v) {
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if (k === '$$date') { return new Date(v); }
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if (typeof v === 'string' || typeof v === 'number' || typeof v === 'boolean' || v === null) { return v; }
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if (v && v.$$date) { return v.$$date; }
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return v;
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});
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}
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// Interface
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module.exports.serialize = serialize;
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module.exports.deserialize = deserialize;
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