git ssb

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const chunk = require('chunk')
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const MAX_DATA_BYTES = 65533
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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.type) {
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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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    }
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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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  /**
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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 idHash = await this._getHashFromObj(id)
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    const state = {
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      nonce: [0],
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      ports: {},
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      type: message.data.type
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    }
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    if (message.data.code && message.data.code.length) {
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      state.code = message.data.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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    if (state.code && state.code.length > MAX_DATA_BYTES) {
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      state.code = chunk(state.code, MAX_DATA_BYTES).map(chk => {
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        return {
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          '/': chk
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        }
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      })
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    }
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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 a hash from a POJO
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  _getHashFromObj (obj) {
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    return this.hypervisor.graph.flush(obj).then(obj => obj['/'])
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  }
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}
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