opt-cc/api/routes/users.js

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"use strict";
// modules
const express = require('express');
const fs = require('fs');
const logger = require('debug')('me2u5:users');
// HTTP status codes by name
const codes = require('./http-codes');
const apiAuthenticationMiddleware = require('../middleware/auth-middleware');
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const checkHl = require('../middleware/permission-check').checkHl;
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const offsetlimitMiddleware = require('../middleware/limitoffset-middleware-mongo');
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const filterHandlerCreator = require('../middleware/filter-handler-mongo');
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const routerHandling = require('../middleware/router-handling');
// Mongoose Model using mongoDB
const UserModel = require('../models/user');
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const SquadModel = require('../models/squad');
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const AwardingModel = require('../models/awarding');
const users = express.Router();
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users.get('/', filterHandlerCreator(UserModel.schema.paths));
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users.get('/', offsetlimitMiddleware);
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// routes **********************
users.route('/')
.get((req, res, next) => {
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const userQuery = () => {
UserModel.find(dbFilter, res.locals.filter, res.locals.limitskip)
.populate('squadId')
.collation({locale: "en", strength: 2}) // case insensitive order
.sort('username').exec((err, users) => {
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if (err) return next(err);
if (users.length === 0) {
res.locals.items = users;
res.locals.processed = true;
return next();
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}
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UserModel.count(dbFilter, (err, totalCount) => {
res.set('x-total-count', totalCount);
res.locals.items = users;
res.locals.processed = true;
return next();
})
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})
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};
if (!req.query.q) req.query.q = '';
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const dbFilter = {username: {"$regex": req.query.q, "$options": "i"}};
if (req.query.squadId) dbFilter["squadId"] = {"$eq": req.query.squadId};
// squad / fraction filter setup
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if (req.query.fractFilter && req.query.fractFilter !== 'UNASSIGNED' && !req.query.squadId) {
SquadModel.find({'fraction': req.query.fractFilter}, {_id: 1}, (err, squads) => {
dbFilter['squadId'] = {$in: squads.map(squad => squad.id)};
userQuery();
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})
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} else {
if (req.query.fractFilter === 'UNASSIGNED') {
dbFilter['squadId'] = {$eq: null};
}
userQuery();
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}
})
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.post(apiAuthenticationMiddleware, checkHl, (req, res, next) => {
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const user = new UserModel(req.body);
// timestamp and default are set automatically by Mongoose Schema Validation
user.save((err) => {
if (err) {
err.status = codes.wrongrequest;
return next(err);
}
res.status(codes.created);
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UserModel.populate(user, {path: 'squadId'}, (err, extUser) => {
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res.locals.items = extUser;
res.locals.processed = true;
return next();
})
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});
})
.all(routerHandling.httpMethodNotAllowed);
users.route('/:id')
.get((req, res, next) => {
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UserModel.findById(req.params.id).populate('squadId').exec((err, user) => {
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if (err) {
err.status = codes.servererror;
return next(err);
}
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else if (!user) {
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err = new Error("item not found");
err.status = codes.notfound;
return next(err);
}
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res.locals.items = user;
res.locals.processed = true;
return next();
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});
})
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.patch(apiAuthenticationMiddleware, checkHl, (req, res, next) => {
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if (!req.body || (req.body._id && req.body._id !== req.params.id)) {
// little bit different as in PUT. :id does not need to be in data, but if the _id and url id must match
const err = new Error('id of PATCH resource and send JSON body are not equal ' + req.params.id + " " + req.body._id);
err.status = codes.notfound;
next(err);
return; // prevent node to process this function further after next() has finished.
}
// optional task 3: increment version manually as we do not use .save(.)
req.body.updatedAt = new Date();
req.body.$inc = {__v: 1};
// PATCH is easier with mongoose than PUT. You simply update by all data that comes from outside. no need to reset attributes that are missing.
UserModel.findByIdAndUpdate(req.params.id, req.body, {new: true}, (err, item) => {
if (err) {
err.status = codes.wrongrequest;
}
else if (!item) {
err = new Error("item not found");
err.status = codes.notfound;
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}
UserModel.populate(item, {path: 'squadId'}, (err, extUser) => {
if (err) {
err.status = codes.servererror;
return next(err);
}
if (!user) {
res.locals.items = {};
res.locals.processed = true;
return next();
}
res.locals.items = extUser;
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res.locals.processed = true;
return next();
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})
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})
})
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.put(apiAuthenticationMiddleware, checkHl, (req, res, next) => {
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// first check that the given element id is the same as the URL id
if (!req.body || req.body._id !== req.params.id) {
// the URL does not fit the given element
var err = new Error('id of PATCH resource and send JSON body are not equal ' + req.params.id + " " + req.body._id);
err.status = codes.notfound;
next(err);
return; // prevent node to process this function further after next() has finished.
}
// main difference of PUT and PATCH is that PUT expects all data in request: checked by using the schema
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const user = new UserModel(req.body);
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UserModel.findById(req.params.id, req.body, {new: true}, function (err, item) {
// with parameter {new: true} the TweetNModel will return the new and changed object from the DB and not the old one.
if (err) {
err.status = codes.wrongrequest;
return next(err);
}
else if (!item) {
err = new Error("item not found");
err.status = codes.notfound;
return next(err);
}
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// check that version is still accurate
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else if (user.__v !== item.__v) {
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err = new Error("version outdated. Meanwhile update on item happened. Please GET resource again")
err.status = codes.conflict;
return next(err);
}
// now update all fields in DB item with body data in variable video
for (var field in UserModel.schema.paths) {
if ((field !== '_id') && (field !== '__v')) {
// this includes undefined. is important to reset attributes that are missing in req.body
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item.set(field, user[field]);
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}
}
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// update updatedAt and increase version
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item.updatedAt = new Date();
item.increment(); // this sets __v++
item.save(function (err) {
if (!err) {
res.locals.items = item;
} else {
err.status = codes.wrongrequest;
err.message += ' in fields: ' + Object.getOwnPropertyNames(err.errors);
}
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UserModel.populate(item, {path: 'squadId'}, (err, extUser) => {
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res.locals.items = extUser;
res.locals.processed = true;
return next();
})
});
})
})
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.delete(apiAuthenticationMiddleware, checkHl, (req, res, next) => {
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UserModel.findByIdAndRemove(req.params.id, (err, item) => {
if (err) {
err.status = codes.wrongrequest;
}
else if (!item) {
err = new Error("item not found");
err.status = codes.notfound;
}
// deleted all awardings linked to this user
AwardingModel.find({userId: req.params.id}).remove().exec();
// check if signature exists and delete compressed and uncompressed file
const fileMinified = __dirname + '/../resource/signature/' + req.params.id + '.png';
if (fs.existsSync(fileMinified)) {
fs.unlink(fileMinified, (err) => {
});
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}
const file = __dirname + '/../resource/signature/big/' + req.params.id + '.png';
if (fs.existsSync(file)) {
fs.unlink(file, (err) => {
});
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}
// we don't set res.locals.items and thus it will send a 204 (no content) at the end. see last handler user.use(..)
res.locals.processed = true;
next(err); // this works because err is in normal case undefined and that is the same as no parameter
});
})
.all(
routerHandling.httpMethodNotAllowed
);
// this middleware function can be used, if you like or remove it
// it looks for object(s) in res.locals.items and if they exist, they are send to the client as json
users.use(routerHandling.emptyResponse);
module.exports = users;