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const Minipass = require('minipass')
const _data = Symbol('_data')
const _length = Symbol('_length')
class Collect extends Minipass {
constructor (options) {
super(options)
this[_data] = []
this[_length] = 0
}
write (chunk, encoding, cb) {
if (typeof encoding === 'function')
cb = encoding, encoding = 'utf8'
if (!encoding)
encoding = 'utf8'
const c = Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk, encoding)
this[_data].push(c)
this[_length] += c.length
if (cb)
cb()
return true
}
end (chunk, encoding, cb) {
if (typeof chunk === 'function')
cb = chunk, chunk = null
if (typeof encoding === 'function')
cb = encoding, encoding = 'utf8'
if (chunk)
this.write(chunk, encoding)
const result = Buffer.concat(this[_data], this[_length])
super.write(result)
return super.end(cb)
}
}
module.exports = Collect
// it would be possible to DRY this a bit by doing something like
// this.collector = new Collect() and listening on its data event,
// but it's not much code, and we may as well save the extra obj
class CollectPassThrough extends Minipass {
constructor (options) {
super(options)
this[_data] = []
this[_length] = 0
}
write (chunk, encoding, cb) {
if (typeof encoding === 'function')
cb = encoding, encoding = 'utf8'
if (!encoding)
encoding = 'utf8'
const c = Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk, encoding)
this[_data].push(c)
this[_length] += c.length
return super.write(chunk, encoding, cb)
}
end (chunk, encoding, cb) {
if (typeof chunk === 'function')
cb = chunk, chunk = null
if (typeof encoding === 'function')
cb = encoding, encoding = 'utf8'
if (chunk)
this.write(chunk, encoding)
const result = Buffer.concat(this[_data], this[_length])
this.emit('collect', result)
return super.end(cb)
}
}
module.exports.PassThrough = CollectPassThrough
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