scuttle-poll/poll/async/buildUpdatedClosingTime.js

Create and vote on polls on ssb

const pull = require('pull-stream')
const pullAsync = require('pull-async')
const { isMsg } = require('ssb-ref')
const { isPoll, isPollUpdate, versionStrings: {V1_SCHEMA_VERSION_STRING} } = require('ssb-poll-schema')
const getMessages = require('./getMessages')
const getHeads = require('../sync/getHeads')

module.exports = function (server) {
  return function UpdatedClosingTime ({ poll, mentions, recps, closesAt }, cb) {
    if (!isPoll(poll) && !isMsg(poll)) return cb(new Error('UpdatedClosingTime factory expects a valid poll'))

    function build ({ key, heads }) {
      // NOTE - poll here is a decorated poll
      const content = {
        type: 'poll-update',
        version: V1_SCHEMA_VERSION_STRING,
        closesAt,
        root: key,
        branch: heads
      }

      if (recps) content.recps = recps
      if (mentions) content.mentions = mentions

      return content
    }

    pull(
      pullAsync(cb => {
        getMessages(server)(poll, (err, msgs) => {
          if (err) return cb(err)

          cb(null, {
            key: poll.key || poll,
            heads: getHeads(poll, msgs.thread)
          })
        })
      }),
      pull.map(build),
      pull.drain(update => {
        if (!isPollUpdate(update)) return cb(isPollUpdate.errors)

        cb(null, update)
      })
    )
  }
}

// // NOTE mentions can be derived from text,
// // or we could leave it so you can manually notify people without having to at-mention spam the text
// if (mentions && (!Array.isArray(mentions) || mentions.length)) {
//   mentions = links(mentions)
//   if (!mentions || !mentions.length) { throw new Error('mentions are not valid links') }
//   content.mentions = mentions
// }

// // NOTE recps should be derived from the poll I think
// if (recps && (!Array.isArray(recps) || recps.length)) {
//   recps = links(recps)
//   if (!recps || !recps.length) { throw new Error('recps are not valid links') }
//   content.recps = recps
// }