src/dar/InMemoryDarBuffer.js

export default class InMemoryDarBuffer {
  constructor () {
    this._version = null
    this._changes = []
    this._isDirty = {}
    this._blobs = {}
  }

  getVersion () {
    return this._version
  }

  load(archiveId, cb) { // eslint-disable-line
    cb()
  }

  addChange (docId, change) {
    // HACK: if there are no ops we skip
    if (change.ops.length === 0) return
    // console.log('RECORD CHANGE', docId, change)
    this._isDirty[docId] = true
    this._changes.push({
      docId, change
    })
  }

  hasPendingChanges () {
    return this._changes.length > 0
  }

  getChanges () {
    return this._changes.slice()
  }

  hasResourceChanged (docId) {
    return this._isDirty[docId]
  }

  hasBlobChanged (assetId) {
    return Boolean(this._isDirty[assetId])
  }

  addBlob (assetId, blob) {
    this._isDirty[assetId] = true
    this._blobs[assetId] = blob
  }

  getBlob (assetId) {
    return this._blobs[assetId]
  }

  reset (version) {
    this._version = version
    this._changes = []
    this._blobs = {}
    this._isDirty = {}
  }
}