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express-crud-router.js
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express-crud-router.js
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var express = require('express')
const permitCheck = require('./express-crud-permit').check;
const sendError = (res, err) => {
const { status = 500, message } = err;
res.status(status).send({
message
})
}
/**
* Returns express.router for a table
*
* - POST /table/ - insert
* - PUT /table/:id - update by id
* - GET /table/ - get all. // or Paginated query: [ord, dir, page, pageSize] defaults: ord = _id, dir = desc, page = 0, pageSize = (page||ord||dir) ? 10 : infinity
* - GET /table/:id - get one doc by id
* - DELETE /table/:id - delete one doc by id
*
* @param {string} table - table name used in file system, don't use spatial chars
* @param {array} fields - Array of Field
* @param {object} crudPermit - crud permit object (use allow or deny with custom functions )
*/
module.exports = (table, fields, crudPermit, driver) => {
if (!crudPermit || !permitCheck(crudPermit)) {
throw 'Bad crudPermit object';
}
const router = express.Router()
const f2f = {};
fields.forEach((f) => {
if (f2f[f.name] !== undefined) {
throw `Duplicate field name ${f}`;
}
f2f[f.name] = f;
})
router.post('/', (req, res) => {
if (!crudPermit.canCreate(req)) {
return sendError(res, { status: 403, message: `Forbiden operation` });
}
if (!req.body) {
return sendError(res, { status: 400, message: `Object content can not be empty` });
}
const newObj = {};
for (let i = 0; i < fields.length; i++) {
const f = fields[i];
if (req.body[f.name]) {
newObj[f.name] = req.body[f.name];
} else if (f.defval !== undefined) {
newObj[f.name] = f.defval;
} else if (f.required) {
return sendError(res, { status: 500, message: `Missing field ${f.name}` });
}
}
driver.create(table, newObj)
.then(d => res.send(d))
.catch((err) => {
sendError(res, err);
});
});
router.get('/', (req, res) => {
if (!crudPermit.canFindAll(req)) {
sendError(res, { status: 403, message: `Forbiden operation` });
} else {
const options = {
page: req.query.page,
pageSize: req.query.pageSize,
ord: req.query.ord,
dir: req.query.dir
}
driver.findAll(table, options)
.then(d => res.send(d))
.catch((err) => {
sendError(res, err);
});
}
});
router.get('/:id', (req, res) => {
if (!crudPermit.canFindOne(req)) {
sendError(res, { status: 403, message: `Forbiden operation` });
return;
}
const id = req.params.id;
driver.findOne(table, id)
.then(d => res.send(d))
.catch((err) => {
sendError(res, err);
})
});
router.put('/:id', (req, res) => {
if (!crudPermit.canUpdate(req)) {
sendError(res, { status: 403, message: `Forbiden operation` });
return;
}
// Validate Request
if (!req.body) {
sendError(res, { status: 400, message: `Empty body` });
return;
}
const _id = req.params.id;
const newObj = {};
Object.keys(req.body).forEach((f) => {
if (f2f[f]) {
newObj[f] = req.body[f];
}
});
driver.update(table, _id, newObj)
.then(d => res.send(d))
.catch((err) => {
sendError(res, err);
});
});
router.delete('/:id', (req, res) => {
if (!crudPermit.canDelete(req)) {
sendError(res, { status: 403, message: `Forbiden operation` });
return;
}
const _id = req.params.id;
driver.remove(table, _id)
.then(d => res.send(d))
.catch((err)=>{
sendError(res, err);
});
});
return router;
}