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64 lines
2.1 KiB
Markdown
64 lines
2.1 KiB
Markdown
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# psn-js
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js implementation of the [PosiStageNet protocol](https://github.com/vyv/psn-cpp/blob/master/doc/PosiStageNetprotocol_v2.03_2019_09_09.pdf)
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## Install
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`npm install --save @jwetzell/posistagenet`
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## Usage
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### Decode - [example](./examples/psn_client.js)
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```
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const { Decoder } = require('@jwetzell/posistagenet')
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const decoder = new Decoder()
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const infoPacketBuffer = Buffer.from('5667348000000c0001000000000000000203010101000b00536572766572204e616d650200118001000d8000000900547261636b65722031','hex')
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const dataPacketBuffer = Buffer.from('5567288000000c00010000000000000002030101010014800100108000000c000000803f0000803f0000803f','hex')
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decoder.decode(infoPacketBuffer)
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decoder.decode(dataPacketBuffer)
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// the system_name from info packets if available
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console.log(decoder.system_name)
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// map of trackers populated with any data that has been received
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// this merges both info and data packet properties into one
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console.log(decoder.trackers)
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```
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### Encode - [example](./examples/psn_server.js)
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```
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const { Encoder, Tracker } = require('@jwetzell/posistagenet')
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const encoder = new Encoder('Server Name', 2,3) //server name, version high, version low
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const trackers = []
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const tracker = new Tracker(1,'Tracker 1') // id, name
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tracker.setPos(1.0,1.0,1.0) // x, y, z
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trackers.push(tracker)
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const timestamp = 1;
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// these two calls return an array of Buffers due to potential splitting that might take place because of max UDP packet size
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const dataPackets = encoder.getDataPackets(timestamp, trackers)
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const infoPackets = encoder.getInfoPackets(timestamp, trackers)
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dataPackets.forEach((dataPacket)=>{
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console.log('send packet somehow')
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console.log(dataPacket.toString('hex'))
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})
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infoPackets.forEach((infoPacket)=>{
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console.log('send packet somehow')
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console.log(infoPacket.toString('hex'))
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})
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```
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## Notes
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- UInt64
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- PosiStageNet uses 64 bit UInt's for timestamp values make sure to use [`BigInt`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt) if using values over `Number.MAX_SAFE_INTEGER` |