DemocracyOS/democracyos

import debug from 'debug'
import topicStore from '../../stores/topic-store/topic-store'
import { getQueryVariable } from '../../utils'

const log = debug('democracyos:topic-middlewares')

/**
 * Clear topic store, to force a fetch to server on next call
 */

export function clearTopicStore (ctx, next) {
  topicStore.clear()
  next()
}

/**
 * Load private topics from specified Forum.
 * Should only be used by admin modules.
 */
export function findPrivateTopics (ctx, next) {
  if (!ctx.forum) {
    throw new Error('First you must fetch the current forum.')
  }

  let query = {
    draft: true,
    forum: ctx.forum.id,
    limit: 100,
    page: getQueryVariable('page') || 1
  }

  let page

  topicStore.findAll(query).then(([topics, pagination]) => {
    ctx.topics = topics
    ctx.pagination = pagination
    next()
  }).catch((err) => {
    if (err.status !== 404) throw err
    log('Unable to load topics.')
  })
}

/**
 * Load public topics from specified ForumfindPrivateTopics
 */
export function findTopics (ctx, next) {
  if (!ctx.forum) {
    throw new Error('First you must fetch the current forum.')
  }

  let query = { forum: ctx.forum.id }

  topicStore.findAll(query).then(([topics, pagination]) => {
    ctx.topics = topics
    ctx.pagination = pagination
    next()
  }).catch((err) => {
    if (err.status !== 404) throw err
    log('Unable to load topics.')
  })
}

/**
 * Load specific topic from context params
 */

export function findTopic (ctx, next) {
  topicStore
    .findOne(ctx.params.id)
    .then((topic) => {
      ctx.topic = topic
      next()
    })
    .catch((err) => {
      if (err.status !== 404) throw err
      log(`Unable to load topic for ${ctx.params.id}`)
    })
}

/**
 * Midleware Generator to verify Topic privileges
 */

export function privileges (privilege) {
  return function privilegesMiddleware (ctx, next) {
    if (ctx.topic && ctx.topic.privileges[privilege]) return next()
  }
}