opt-cc/api/routes/ranks.js

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2017-05-10 11:04:06 +02:00
"use strict";
// modules
const fs = require('fs');
const express = require('express');
const multer = require('multer');
const storage = multer.memoryStorage();
const upload = multer({storage: storage});
const logger = require('debug')('cc:ranks');
// 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 routerHandling = require('../middleware/router-handling');
// Mongoose Model using mongoDB
const RankModel = require('../models/rank');
const ranks = express.Router();
// add middleware for bonus tasks 4 and 5 to find filter and offset/limit params for GET / and GET /:id
// routes **********************
ranks.route('/')
.get((req, res, next) => {
const filter = {};
if (req.query.fractFilter) {
filter.fraction = req.query.fractFilter.toUpperCase()
}
if (req.query.q) {
filter.name = {$regex: req.query.q, $options: 'i'}
}
RankModel.find(filter, {}, {sort: {fraction: 'asc', level: 'asc'}}, (err, items) => {
if (err) {
err.status = codes.servererror;
return next(err);
}
if (items && items.length > 0) {
res.locals.items = items;
} else {
res.locals.items = [];
}
res.locals.processed = true;
next();
});
})
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.post(apiAuthenticationMiddleware, checkHl, upload.single('image'), (req, res, next) => {
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const rank = new RankModel(req.body);
// timestamp and default are set automatically by Mongoose Schema Validation
rank.save((err) => {
if (err) {
err.status = codes.wrongrequest;
next(err);
}
res.status(codes.created);
res.locals.items = rank;
fs.appendFile(__dirname + '/../resource/rank/' + rank.id + '.png', new Buffer(req.file.buffer),
(err) => {
if (err) next(err);
});
next();
});
})
.all(
routerHandling.httpMethodNotAllowed
);
ranks.route('/:id')
.get((req, res, next) => {
RankModel.findById(req.params.id, (err, item) => {
if (err) {
err.status = codes.servererror;
return next(err);
}
else if (!item) {
err = new Error("item not found");
err.status = codes.notfound;
return next(err);
}
res.locals.items = item;
next();
});
})
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.patch(apiAuthenticationMiddleware, checkHl, upload.single('image'), (req, res, next) => {
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if (!req.body || (req.body._id && req.body._id !== req.params.id)) {
// little bit different as in PUT. :id does not need to be in data, but if the _id and url id must match
const err = new Error('id of PATCH resource and send JSON body are not equal ' + req.params.id + " " + req.body._id);
err.status = codes.notfound;
next(err);
return; // prevent node to process this function further after next() has finished.
}
// optional task 3: increment version manually as we do not use .save(.)
req.body.updatedAt = new Date();
req.body.$inc = {__v: 1};
if (req.file) {
const file = __dirname + '/../resource/rank/' + req.body._id + '.png';
fs.unlink(file, (err) => {
if (err) next(err);
fs.appendFile(file, new Buffer(req.file.buffer),
(err) => {
if (err) next(err);
});
});
}
// 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.
RankModel.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;
}
else {
res.locals.items = item;
}
next(err);
})
})
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.delete(apiAuthenticationMiddleware, checkHl, (req, res, next) => {
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RankModel.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;
}
// 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
ranks.use(routerHandling.emptyResponse);
module.exports = ranks;