gancio-upstream/server/api/controller/settings.js

const Mastodon = require('mastodon-api')
const { setting: Setting } = require('../models')

const baseurl = process.env.baseurl

const settingsController = {

  async setAdminSetting(key, value) {
    await Setting.findOrCreate({ where: { key },
      defaults: { value } })
      .spread((settings, created) => {
        if (!created) return settings.update({ value })
      })
  },

  async getAdminSettings(req, res) {
    const settings = await settingsController.settings()
    res.json(settings)
  },

  async getAuthURL(req, res) {
    const instance = req.body.instance
    const callback = `${baseurl}/api/settings/oauth`
    const { client_id, client_secret } = await Mastodon.createOAuthApp(`https://${instance}/api/v1/apps`,
      'gancio', 'read write', callback)
    const url = await Mastodon.getAuthorizationUrl(client_id, client_secret,
      `https://${instance}`, 'read write', callback)

    await settingsController.setAdminSetting('mastodon_auth', { client_id, client_secret, instance })
    res.json(url)
  },

  async code(req, res) {
    const code = req.query.code
    let client_id, client_secret, instance
    const callback = `${baseurl}/api/settings/oauth`

    const settings = await settingsController.settings()

    ({ client_id, client_secret, instance } = settings.mastodon_auth)

    try {
      const token = await Mastodon.getAccessToken(client_id, client_secret, code,
        `https://${instance}`, callback)
      const mastodon_auth = { client_id, client_secret, access_token: token, instance }
      await settingsController.setAdminSetting('mastodon_auth', mastodon_auth)

      res.redirect('/admin')
    } catch (e) {
      res.json(e)
    }
  },

  async settings() {
    const settings = await Setting.findAll()
    return settings
  }

}

module.exports = settingsController