const Factory = require('../factory')
const Utils = require('./utils')

//
// Initialize the child logger for
// the module
//
const log = require('../log').child({
  module: 'custom emoji'
})

module.exports = async function (context) {
  const collection = context.rocketchat.emojiCollection()
  const fileCollection = context.rocketchat.collection('custom_emoji')

  const cursor = collection.find()
  while (await cursor.hasNext()) {
    const result = await cursor.next()

    const filename = `${result.name}.${result.extension}`
    const dest = `${context.config.target.filesPath}/custom_emoji/${filename}`

    try {
      const srcFilename = Utils.srcPath(context.config.source.customEmojiPath, filename)
      if (srcFilename) {
        Utils.copyFile(srcFilename, dest)
      } else {
        await Utils.downloadGridFSByName(context, fileCollection, filename, dest)
      }
      log.info(`... copied ${result.name}`)
    } catch (err) {
      log.warn(`... skipping emoji "${result.name}": ${err.message}`)
    }
  }
  return context
}