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fhir.mjs
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fhir.mjs
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import dotenv from 'dotenv'
dotenv.config()
import axios from 'axios'
import Case from 'case'
import express from 'express'
import fastDiff from 'fast-diff'
import moment from 'moment'
import objectPath from 'object-path'
import pluralize from 'pluralize'
import PouchDB from 'pouchdb'
import { v4 as uuidv4 } from 'uuid'
import { eventAdd, sync, verifyJWT } from './core.mjs'
const router = express.Router()
import PouchDBFind from 'pouchdb-find'
PouchDB.plugin(PouchDBFind)
export default router
router.get('/api/:pid/:type', verifyJWT, querySecuredResource) //search
router.post('/api/:pid/:type', verifyJWT, postSecuredResource) //create
router.get('/api/:pid/:type/:id', verifyJWT, getSecuredResource) //read
router.put('/api/:pid/:type/:id', verifyJWT, putSecuredResource) //update
router.delete('/api/:pid/:type/:id', verifyJWT, deleteSecuredResource) //delete
router.get('/api/:pid/:type/:id/_history/:vid', verifyJWT, getSecuredResourceVersion) //vread
async function deleteSecuredResource(req, res) {
let prefix = ''
if (process.env.INSTANCE === 'digitalocean' && process.env.NOSH_ROLE === 'patient') {
prefix = req.params.pid + '_'
}
const startTime = performance.now()
await sync(Case.snake(pluralize(req.params.type)), req.params.pid)
const db = new PouchDB(prefix + Case.snake(pluralize(req.params.type)))
try {
const doc = await db.get(req.params.id)
const result = await db.remove(doc)
const opts = {
doc_db: Case.snake(pluralize(req.params.type)),
doc_id: result.id,
diff: null
}
opts = await eventUser(res, opts, prefix)
await eventAdd('Deleted ' + pluralize.singular(req.params.type.replace('_statements', '')), opts, req.params.pid)
await pollSet(req.params.pid, Case.snake(pluralize(req.params.type)))
const endTime = performance.now()
const diff = endTime - startTime
const diagnostics = "Successfully deleted 1 resource(s) in " + diff + "ms"
res.set('ETag', 'W/"' + doc._rev + '"')
res.status(200).json({
"resourceType": "OperationOutcome",
"issue": [
{
"severity": "information",
"code": "informational",
"diagnostics": diagnostics
}
]
})
} catch (err) {
res.status(200).json(err)
}
}
async function getSecuredResource(req, res) {
let prefix = ''
if (process.env.INSTANCE === 'digitalocean' && process.env.NOSH_ROLE === 'patient') {
prefix = req.params.pid + '_'
}
await sync(Case.snake(pluralize(req.params.type)), req.params.pid)
const db = new PouchDB(prefix + Case.snake(pluralize(req.params.type)))
try {
const doc = await db.get(req.params.id, {revs_info: true})
res.status(200).json(doc)
} catch(err) {
res.status(200).json(err)
}
}
async function getSecuredResourceVersion(req, res) {
let prefix = ''
if (process.env.INSTANCE === 'digitalocean' && process.env.NOSH_ROLE === 'patient') {
prefix = req.params.pid + '_'
}
await sync(Case.snake(pluralize(req.params.type)), req.params.pid)
const db = new PouchDB(prefix + Case.snake(pluralize(req.params.type)))
try {
const doc = db.get(req.params.id, {rev: req.params.vid})
res.status(200).json(doc)
} catch(err) {
res.status(200).json(err)
}
}
async function postSecuredResource(req, res) {
let prefix = ''
if (process.env.INSTANCE === 'digitalocean' && process.env.NOSH_ROLE === 'patient') {
prefix = req.params.pid + '_'
}
await sync(Case.snake(pluralize(req.params.type)), req.params.pid)
const db = new PouchDB(prefix + Case.snake(pluralize(req.params.type)))
try {
const id = 'nosh_' + uuidv4()
objectPath.set(req, 'body.id', id)
objectPath.set(req, 'body._id', id)
objectPath.set(req, 'body.subject.reference', 'Patient/' + req.params.pid)
const body = await db.put(req.body)
await sync(Case.snake(pluralize(req.params.type)), req.params.pid)
const opts = {
doc_db: Case.snake(pluralize(req.params.type)),
doc_id: body.id,
diff: null
}
opts = await eventUser(res, opts, prefix)
await eventAdd('Updated ' + pluralize.singular(req.params.type.replace('_statements', '')), opts, req.params.pid)
await pollSet(req.params.pid, Case.snake(pluralize(req.params.type)))
res.set('ETag', 'W/"' + body.rev + '"')
res.status(200).json(body)
} catch(err) {
res.status(200).json(err)
}
}
async function putSecuredResource(req, res) {
let prefix = ''
if (process.env.INSTANCE === 'digitalocean' && process.env.NOSH_ROLE === 'patient') {
prefix = req.params.pid + '_'
}
await sync(Case.snake(pluralize(req.params.type)), req.params.pid)
const db = new PouchDB(prefix + Case.snake(pluralize(req.params.type)))
try {
let prev_data = ''
let diff = null
try {
const prev = await db.get(req.body._id)
prev_data = JSON.stringify(prev)
} catch (e) {
console.log('New Document')
}
const body = await db.put(req.body)
await sync(Case.snake(pluralize(req.params.type)), req.params.pid)
if (prev_data !== '') {
const diff_result = fastDiff(JSON.stringify(req.body), prev_data)
console.log(diff_result)
diff = diff_result.join(',')
}
const opts = {
doc_db: Case.snake(pluralize(req.params.type)),
doc_id: body.id,
diff: diff
}
opts = await eventUser(res, opts, prefix)
await eventAdd('Updated ' + pluralize.singular(req.params.type.replace('_statements', '')), opts, req.params.pid)
await pollSet(req.params.pid, Case.snake(pluralize(req.params.type)))
res.set('ETag', 'W/"' + body.rev + '"')
res.status(200).json(body)
} catch(err) {
res.status(200).json(err)
}
}
async function querySecuredResource(req, res) {
let prefix = ''
if (process.env.INSTANCE === 'digitalocean' && process.env.NOSH_ROLE === 'patient') {
prefix = req.params.pid + '_'
}
await sync(Case.snake(pluralize(req.params.type)), req.params.pid)
const db = new PouchDB(prefix + Case.snake(pluralize(req.params.type)))
const entries = []
const selector = []
const reference_arr = ['subject','patient','encounter','asserter','requester','author']
for (const [key, value] of Object.entries(req.query)) {
let key1 = ''
if (key == 'patient') {
key = 'subject'
}
if (reference_arr.includes(key)) {
key1 = Case.camel(key) + '.reference'
} else {
key1 = Case.camel(key)
}
selector.push({[key1]: value})
}
selector.push({_id: {"$gte": null}})
const result = await db.find({selector: {$and: selector}})
let i = 0
for (const a in result.docs) {
entries.push({
resource: result.docs[a],
search: {mode: 'match'}
})
i++
}
const id = 'nosh_' + uuidv4()
const time = moment().format('YYYY-MM-DDTHH:mm:ss.SSSZ')
res.status(200).json({
resourceType: 'Bundle',
id: id,
_id: id,
type: 'searchset',
timestamp: time,
total: i,
entry: entries
})
}