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user.js
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user.js
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const config = require('config')
const Twitter = require('twitter')
const cloudinary = require('cloudinary')
const User = require('../../models/user.js')
const { ERRORS } = require('../../../lib/util')
const logger = require('../../../lib/logger.js')()
exports.get = async function (req, res) {
// Flag error if user ID is not provided
if (!req.params.user_id) {
res.status(400).send('Please provide user ID.')
return
}
const targetUserId = req.params.user_id
let targetUser
const findUserById = async function (userId) {
try {
targetUser = await User.findOne({ id: userId })
} catch (err) {
logger.error(err)
throw new Error(ERRORS.CANNOT_GET_USER)
}
if (!targetUser) {
throw new Error(ERRORS.USER_NOT_FOUND)
}
return targetUser
}
let requestUser
const findUserByLoginToken = async function (loginToken) {
try {
requestUser = await User.findOne({ login_tokens: { $in: [loginToken] } })
} catch (err) {
logger.error(err)
throw new Error(ERRORS.CANNOT_GET_USER)
}
if (!requestUser) {
throw new Error(ERRORS.UNAUTHORISED_ACCESS)
}
// Finding target user
if (req.user_id !== targetUserId) {
try {
targetUser = await findUserById(targetUserId)
} catch (error) {
logger.error(error)
throw new Error(ERRORS.CANNOT_GET_USER)
}
if (!targetUser) {
throw new Error(ERRORS.UNAUTHORISED_ACCESS)
}
} else {
targetUser = requestUser
}
return targetUser
}
const handleFindUser = function (user) {
let twitterApiClient
try {
twitterApiClient = new Twitter({
consumer_key: config.twitter.oauth_consumer_key,
consumer_secret: config.twitter.oauth_consumer_secret,
access_token_key: user.twitter_credentials.access_token_key,
access_token_secret: user.twitter_credentials.access_token_secret
})
} catch (error) {
logger.error('Could not initialize Twitter API client: ' + error)
}
const sendUserJson = function (data) {
// If requestUser = targetUser => permission granted
// If requestUser exists and requestUser != targetUser and requestUser is admin => permission granted
const auth = (user.login_tokens.indexOf(req.loginToken) !== -1) || (requestUser && requestUser.roles.includes('ADMIN'))
user.asJson({ auth: auth }, function (err, userJson) {
if (err) {
logger.error(err)
res.status(500).send('Could not render user JSON.')
return
}
if (data) {
userJson.profileImageUrl = data.twitter_profile_image_url
} else {
userJson.profileImageUrl = user.profile_image_url
}
res.status(200).send(userJson)
})
} // END function - sendUserJson
let responseAlreadySent = false
const handleFetchUserProfileFromTwitter = function (err, res) {
if (err) {
logger.error('Twitter API call users/show returned error.')
logger.error(err)
}
if (responseAlreadySent) {
logger.debug({ profile_image_url: res.profile_image_url }, 'Twitter API users/show call returned but response already sent!')
} else {
logger.debug({ profile_image_url: res.profile_image_url }, 'Twitter API users/show call returned. Sending response with Twitter data.')
responseAlreadySent = true
if (!res) {
logger.error('Twitter API call users/show did not return any data.')
}
sendUserJson({
twitter_profile_image_url: res.picture
})
}
} // END function - handleFetchUserProfileFromTwitter
if (twitterApiClient && !user.profile_image_url) {
logger.debug('About to call Twitter API: /users/show.json?user_id=' + user.twitter_id)
twitterApiClient.get('/users/show.json', { user_id: user.twitter_id }, handleFetchUserProfileFromTwitter)
setTimeout(function () {
if (!responseAlreadySent) {
logger.debug(`Timing out Twitter API call after %d milliseconds and sending partial response.`, config.twitter.timeout_ms)
responseAlreadySent = true
sendUserJson()
}
}, config.twitter.timeout_ms)
} else {
sendUserJson()
}
} // END function - handleFindUser
const handleError = function (error) {
switch (error) {
case ERRORS.USER_NOT_FOUND:
res.status(404).send('User not found.')
return
case ERRORS.CANNOT_GET_USER:
res.status(500).send('Error finding user.')
return
case ERRORS.UNAUTHORISED_ACCESS:
res.status(401).send('User with that login token not found.')
return
default:
res.status(500).end()
}
}
if (req.loginToken) {
findUserByLoginToken(req.loginToken)
.then(handleFindUser)
.catch(handleError)
} else {
findUserById(targetUserId)
.then(handleFindUser)
.catch(handleError)
}
}
exports.put = async function (req, res) {
let body
try {
body = req.body
} catch (e) {
res.status(400).send('Could not parse body as JSON.')
return
}
// Flag error if user ID is not provided
if (!req.params.user_id) {
res.status(400).send('Please provide user ID.')
return
}
// 1. on auth header, check userId matches their login token
// 2a. if auth.userId = params.userId => permission granted
// 2b. if auth.userId != params.userId, auth.userId IS admin => permission granted
// Find requesting user
const userId = req.userId
let user
try {
user = await User.findOne({ id: userId })
} catch (err) {
logger.error(err)
res.status(500).send('Error finding user.')
}
if (!user) {
res.status(404).send('User not found.')
return
}
// Is requesting user logged in?
if (user.login_tokens.indexOf(req.loginToken) === -1) {
res.status(401).end()
return
}
// Find target user
const targetUserId = req.params.user_id
let targetUser
if (userId !== targetUserId) {
try {
targetUser = await User.findOne({ id: targetUserId })
} catch (err) {
logger.error(err)
res.status(500).send('Error finding user.')
}
if (!targetUser) {
res.status(404).send('User not found.')
return
}
} else {
targetUser = user
}
if (userId === targetUserId || user.roles.includes('ADMIN')) {
targetUser.data = body.data || targetUser.data
targetUser.flags = body.flags || targetUser.flags
targetUser.roles = body.roles || targetUser.roles
targetUser.id = body.id || targetUser.id
targetUser.profile_image_url = body.profileImageUrl || targetUser.profile_image_url
targetUser.save().then(user => {
res.status(204).end()
}).catch(err => {
logger.error(err)
res.status(500).send('Could not update user information.')
})
} else {
res.status(401).end()
}
} // END function - exports.put
exports.delete = async function (req, res) {
if (!req.params.user_id) {
res.status(400).send('Please provide user ID.')
return
} else if (!req.loginToken) {
res.status(400).send('Please provide login token.')
}
const userId = req.userId
const targetUserId = req.params.user_id
let requestUser
try {
requestUser = await User.findOne({ id: userId })
} catch (error) {
logger.error(error)
res.status(500).send('Error finding user.')
}
if (!requestUser) {
res.status(404).send('User not found.')
return
}
// Is requesting user logged in?
if (requestUser.login_tokens.indexOf(req.loginToken) === -1) {
res.status(401).end()
return
}
let targetUser
if (targetUserId !== userId) {
try {
targetUser = await User.findOne({ id: targetUserId })
} catch (error) {
logger.error(error)
res.status(500).send('Error finding user.')
}
if (!targetUser) {
res.status(404).send('User not found.')
return
}
} else {
targetUser = requestUser
}
const handleDeleteUser = async function (err, user) {
if (err) {
logger.error(err)
res.status(500).send('Error deleting user.')
}
if (!user) {
res.status(404).send('User not found.')
return
}
// If successful in deleting user, delete user's profile image cached in cloudinary.
const publicId = `${config.env}/profile_image/${targetUserId}`
try {
await cloudinary.v2.uploader.destroy(publicId)
} catch (error) {
// If unable to delete user's profile image from cloudinary, log error and continue.
logger.error(error)
}
res.status(204).end()
}
if (userId === targetUserId || requestUser.roles.includes('ADMIN')) {
User.deleteOne({ id: targetUserId }, handleDeleteUser)
} else {
res.status(401).end()
}
}