opt-cc/server/routes/decorations.js

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'use strict';
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// modules
const fs = require('fs');
const express = require('express');
const multer = require('multer');
const storage = multer.memoryStorage();
const upload = multer({storage: storage});
// 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;
const genericGetById = require('./_generic').genericGetById;
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const routerHandling = require('../middleware/router-handling');
const idValidator = require('../middleware/validators').idValidator;
const resourceLocation = require('../middleware/resource-location').resourceLocation().concat('/decoration/');
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// Mongoose Model using mongoDB
const DecorationModel = require('../models/decoration');
const AwardingsModel = require('../models/awarding');
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// util
const imageDimensionValidator = require('../middleware/validators').imageDimensionValidator;
const MAX_MEDAL_IMAGE_WIDTH = 100;
const MAX_MEDAL_IMAGE_HEIGHT = 150;
const MAX_RIBBON_IMAGE_WIDTH = 150;
const MAX_RIBBON_IMAGE_HEIGHT = 50;
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const decorationRouter = new express.Router();
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// routes **********************
decorationRouter.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'};
}
DecorationModel.find(filter, {}, {
sort: {
fraction: 'asc',
isMedal: 'asc',
sortingNumber: 'asc',
name: '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();
});
})
.post(apiAuthenticationMiddleware, checkHl, upload.single('image'), (req, res, next) => {
if (req.file) {
const decoration = new DecorationModel(req.body);
const imageFileBuffer = req.file.buffer;
const err = imageDimensionValidator(imageFileBuffer,
(decoration.isMedal ? MAX_MEDAL_IMAGE_WIDTH : MAX_RIBBON_IMAGE_WIDTH),
(decoration.isMedal ? MAX_MEDAL_IMAGE_HEIGHT : MAX_RIBBON_IMAGE_HEIGHT));
if (err) {
return next(err);
}
// timestamp and default are set automatically by Mongoose Schema Validation
decoration.save((err) => {
if (err) {
err.status = codes.wrongrequest;
err.message += ' in fields: ' + Object.getOwnPropertyNames(err.errors);
return next(err);
}
res.status(codes.created);
res.locals.items = decoration;
fs.appendFile(resourceLocation + decoration._id + '.png',
new Buffer(req.file.buffer),
(err) => {
if (err) next(err);
});
next();
});
} else {
const err = new Error('no image file provided');
err.status = codes.wrongmediasend;
next(err);
}
})
.all(
routerHandling.httpMethodNotAllowed
);
decorationRouter.route('/:id')
.get(idValidator, (req, res, next) => {
return genericGetById(req, res, next, DecorationModel);
})
.patch(apiAuthenticationMiddleware, checkHl, upload.single('image'), (req, res, next) => {
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};
DecorationModel.findById(req.body._id, (err, item) => {
if (err) {
return next(err);
}
if (req.file) {
const imageFileBuffer = req.file.buffer;
const imageDimensionError = imageDimensionValidator(imageFileBuffer,
(item.isMedal ? MAX_MEDAL_IMAGE_WIDTH : MAX_RIBBON_IMAGE_WIDTH),
(item.isMedal ? MAX_MEDAL_IMAGE_HEIGHT : MAX_RIBBON_IMAGE_HEIGHT));
if (imageDimensionError) {
return next(imageDimensionError);
}
const file = resourceLocation + req.params.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.
DecorationModel.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);
});
});
})
.delete(apiAuthenticationMiddleware, checkHl, (req, res, next) => {
const id = req.params.id;
DecorationModel.findByIdAndRemove(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 decoration
AwardingsModel.find({decorationId: id}).remove().exec();
// delete graphic
fs.unlink(resourceLocation.concat(id).concat('.png'),
(err) => {
// we don't set res.locals.items and thus it will send a 204 (no content) at the end. see last
// handler
res.locals.processed = true;
next(err);
});
});
})
.all(
routerHandling.httpMethodNotAllowed
);
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// 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
decorationRouter.use(routerHandling.emptyResponse);
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module.exports = decorationRouter;