git ssb

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const Message = require('primea-message')
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const DeleteMessage = require('./deleteMessage.js')
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module.exports = class CreationService {
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  constructor (opts) {
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    this.hypervisor = opts.hypervisor
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    this.scheduler = this.hypervisor.scheduler
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  }
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  queue (port, message) {
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    if (message.data[0] === 0x00) {
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      let id
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      if (message.fromId) {
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        const creator = this.scheduler.getInstance(message.fromId)
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        id = creator.generateNextId()
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      }
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      return this.createInstance(message, id)
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    } else if (message.responsePort && !(message instanceof DeleteMessage)) {
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      this.send(message.responsePort, new Message({
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        ports: [this.getPort()]
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      }))
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    }
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  }
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  getPort () {
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    return {
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      messages: [],
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      destId: 0
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    }
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  }
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  send (port, message) {
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    message._hops++
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    message._fromTicks = this.ticks
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    message.fromId = this.id
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    return this.hypervisor.send(port, message)
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  }
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  /**
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   * creates an new container instances and save it in the state
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   * @returns {Promise}
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   */
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  async createInstance (message, id = {nonce: 0, parent: null}) {
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    const encoded = encodedID(id)
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    const idHash = await this._getHashFromObj(encoded)
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    const state = {
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      nonce: 0,
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      ports: {},
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      type: message.data[1]
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    }
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    const code = message.data.slice(2)
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    if (code.length) {
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      state.code = code
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    }
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    // create the container instance
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    const instance = await this.hypervisor._loadInstance(idHash, state)
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    // send the intialization message
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    await instance.create(message)
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    // save the container in the state
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    await this.hypervisor.tree.set(idHash, state)
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    if (!Object.keys(instance.ports.ports).length) {
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      this.hypervisor.addNodeToCheck(instance.id)
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    }
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    return instance
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  }
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  get state () {
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    return {}
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  }
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  // get a hash from a POJO
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  _getHashFromObj (obj) {
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    return this.hypervisor.tree.constructor.getMerkleLink(obj)
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  }
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}
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function encodedID (id) {
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  const nonce = Buffer.from([id.nonce])
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  if (id.parent) {
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    return Buffer.concat([nonce, id.parent])
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  } else {
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    return nonce
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  }
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}
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