budibase/packages/core/src/collectionApi/initialise.js

import { filter } from "lodash/fp"
import {
  getFlattenedHierarchy,
  isCollectionRecord,
  isRoot,
} from "../templateApi/hierarchy"
import { $, allTrue, joinKey } from "../common"

export const ensureCollectionIsInitialised = async (datastore, node, dir) => {
  if (!(await datastore.exists(dir))) {
    await datastore.createFolder(dir)
    await datastore.createFolder(joinKey(dir, node.nodeId))
  }
}

export const initialiseRootCollections = async (datastore, hierarchy) => {
  const rootCollectionRecord = allTrue(
    n => isRoot(n.parent()),
    isCollectionRecord
  )

  const flathierarchy = getFlattenedHierarchy(hierarchy)

  const collectionRecords = $(flathierarchy, [filter(rootCollectionRecord)])

  for (const col of collectionRecords) {
    await ensureCollectionIsInitialised(
      datastore,
      col,
      col.collectionPathRegx()
    )
  }
}

export const initialiseChildCollections = async (app, recordInfo) => {
  const childCollectionRecords = $(recordInfo.recordNode, [
    n => n.children,
    filter(isCollectionRecord),
  ])

  for (const child of childCollectionRecords) {
    await ensureCollectionIsInitialised(
      app.datastore,
      child,
      recordInfo.child(child.collectionName)
    )
  }
}