'use strict'
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const promise = require('./promise')
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const streamify = require('./streamify')
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module.exports = stringify
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/**
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* Public function `stringify`.
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*
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* Returns a promise and asynchronously serialises a data structure to a
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* JSON string. Sanely handles promises, buffers, maps and other iterables.
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*
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* @param data: The data to transform
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*
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* @option space: Indentation string, or the number of spaces
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* to indent each nested level by.
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*
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* @option promises: 'resolve' or 'ignore', default is 'resolve'.
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*
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* @option buffers: 'toString' or 'ignore', default is 'toString'.
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*
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* @option maps: 'object' or 'ignore', default is 'object'.
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*
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* @option iterables: 'array' or 'ignore', default is 'array'.
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*
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* @option circular: 'error' or 'ignore', default is 'error'.
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*
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* @option yieldRate: The number of data items to process per timeslice,
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* default is 16384.
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*
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* @option bufferLength: The length of the buffer, default is 1024.
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*
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* @option highWaterMark: If set, will be passed to the readable stream constructor
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* as the value for the highWaterMark option.
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*
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* @option Promise: The promise constructor to use, defaults to bluebird.
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**/
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function stringify (data, options) {
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const json = []
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const Promise = promise(options)
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const stream = streamify(data, options)
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let resolve, reject
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stream.on('data', read)
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stream.on('end', end)
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stream.on('error', error)
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stream.on('dataError', error)
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return new Promise((res, rej) => {
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resolve = res
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reject = rej
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})
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function read (chunk) {
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json.push(chunk)
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}
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function end () {
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resolve(json.join(''))
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}
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function error (e) {
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reject(e)
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}
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}
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