heroku/heroku-pg

'use strict'

const cli = require('heroku-cli-util')
const co = require('co')

exports.boolean = (value) => {
  switch (value) {
    case 'true': case 'TRUE': case 'ON': case 'on': case true:
      return true
    case 'false': case 'FALSE': case 'OFF': case 'off': case null: case false:
      return false
    default:
      throw new TypeError('Invalid value. Valid options are: a boolean value')
  }
}

exports.enum = (value) => {
  return value
}

exports.numeric = (value) => {
  let n = Number(value)
  if (!isFinite(n)) {
    throw new TypeError('Invalid value. Valid options are: a numeric value')
  }
  return n
}

exports.generate = (name, convert, explain) => {
  return co.wrap(function * run (context, heroku) {
    const host = require('./host')
    const util = require('./util')
    const fetcher = require('./fetcher')(heroku)
    const {app, args} = context
    const {value, database} = args

    const db = yield fetcher.addon(app, database)

    if (util.starterPlan(db)) throw new Error('This operation is not supported by Hobby tier databases.')
    if (util.legacyPlan(db)) throw new Error('This operation is not supported by Legacy tier databases.')

    if (!value) {
      let settings = yield heroku.get(`/postgres/v0/databases/${db.id}/config`, {host: host(db)})
      let setting = settings[name]
      cli.log(`${name.replace(/_/g, '-')} is set to ${setting.value} for ${db.name}.`)
      cli.log(explain(setting))
    } else {
      let settings = yield heroku.patch(`/postgres/v0/databases/${db.id}/config`, {
        host: host(db),
        body: { [name]: convert(value) }
      })
      let setting = settings[name]
      cli.log(`${name.replace(/_/g, '-')} has been set to ${setting.value} for ${db.name}.`)
      cli.log(explain(setting))
    }
  })
}