263 lines
11 KiB
Markdown
263 lines
11 KiB
Markdown
> This doc is a WIP and will be expanded shortly.
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>
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> In the meantime, please consider looking at the extensive docs in the [Fasten Docs Repository](https://github.com/fastenhealth/docs/tree/main/technical)
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# Tech Stack
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Fasten is made up of a handful of different components. Here's a summary of the technologies & languages used in Fasten:
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**Frontend**
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- NodeJS `v18.9.0`
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- Yarn `1.22.19`
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- Angular `v14.1.3`
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**Backend**
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- Go `v1.18.3`
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**Misc**
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- Docker `v20.10.17`
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## Setup
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If you're on a Mac, you can run the following commands to install the necessary software to get setup:
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```bash
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brew install node
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npm install -g @angular/cli@14.1.3
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npm install -g yarn
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brew install go
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brew install docker
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```
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# Running Tests
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Before making changes to Fasten, you'll want to run the test suites to ensure that your environment is setup correctly:
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```bash
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make test
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# if you only want to run the frontend tests (Angular), you can run:
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make test-frontend
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# alternatively, if you only care about backend (Go) tests, you can run:
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make test-backend
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```
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# Start Development Environment
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To run Fasten from source, you'll need to create 2 separate processes:
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- Angular Frontend
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- Go Backend
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First we'll create a development config file (`config.dev.yaml`)
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```yaml
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version: 1
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web:
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listen:
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port: 9090
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host: 0.0.0.0
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basepath: ''
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src:
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frontend:
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path: ./dist
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database:
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location: 'fasten.db'
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cache:
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location: ''
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log:
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file: '' #absolute or relative paths allowed, eg. web.log
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level: INFO
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```
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Next we'll start the processes described above:
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```bash
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# In terminal #1, run the following
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cd frontend
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yarn install
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yarn dist -- -c [sandbox|prod]
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# eg. yarn dist -- -c prod
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# In terminal #2, run the following
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go mod vendor
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go run backend/cmd/fasten/fasten.go start --config ./config.dev.yaml --debug
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```
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_Note_: Fasten can run in 2 modes: sandbox or production (prod). In sandbox mode, it can only communicate with test servers (full of synthetic health data).
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Now you can open a browser to `http://localhost:9090` to see the Fasten UI.
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## Important URL's
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The following URL's and credentials may be helpful as you're developing
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- http://localhost:9090/web/dashboard - WebUI
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### Credentials
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- WebUI:
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- username: `testuser`
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- password: `testuser`
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# Source Code Folder Structure
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The Fasten source code is organized into a handful of important folders, which we'll describe below:
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## Frontend
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```
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├── frontend
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│ ├── src
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│ │ ├── app
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│ │ │ ├── app-routing.module.ts
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│ │ │ ├── app.component.html
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│ │ │ ├── app.component.scss
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│ │ │ ├── app.component.spec.ts
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│ │ │ ├── app.component.ts
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│ │ │ ├── app.module.ts
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│ │ │ ├── components # contains shared/partial components reused on multiple pages.
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│ │ │ │ ├── components-sidebar
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│ │ │ │ ├── footer
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│ │ │ │ ├── header
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│ │ │ │ ├── list-fallback-resource
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│ │ │ │ ├── list-generic-resource # A component containing a table view for every FHIR resource
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│ │ │ │ ├── list-patient
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│ │ │ │ ├── resource-list # Thin shim which populates template depending on FHIR resource type
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│ │ │ │ ├── toast # Toast/notification component
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│ │ │ │ └── utilities-sidebar
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│ │ │ ├── models # contains classes for communicating with API's and transfering data between pages.
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│ │ │ ├── pages
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│ │ │ │ ├── auth-signin # Login/Signin page
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│ │ │ │ ├── auth-signup # Signup page
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│ │ │ │ ├── dashboard # Dashboard, visible after logging in
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│ │ │ │ ├── medical-sources # Medical Provider connection page
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│ │ │ │ ├── patient
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│ │ │ │ ├── resource-detail # Page displaying detailed information about FHIR resource
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│ │ │ │ └── source-detail # 2 column page displaying FHIR counts, and table listing FHIR resources for selected type
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│ │ │ ├── services
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│ │ │ │ ├── auth-interceptor.service.ts # service that looks for 401/403 API responses and triggers Logout
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│ │ │ │ ├── is-authenticated-auth-guard.ts # service that checks if user is logged in
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│ │ │ │ ├── fasten-api.service.ts # api service, used to commnunicate with Go backend (WILL BE REMOVED)
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│ │ │ │ ├── fasten-db.service.ts # db service, used to communicate with CouchDB database
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│ │ │ │ ├── lighthouse.service.ts # api service, used to communicate with auth-gateway (Lighthouse)
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│ │ │ │ └── toast.service.ts # notifications service, used to send notifications
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│ │ │ └── workers
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│ │ │ ├── queue.service.spec.ts
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│ │ │ ├── queue.service.ts # queue service, used to coordinate background work
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│ │ │ └── source-sync.worker.ts # background job (web-worker) that syncs all FHIR resources from healthcare provider
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│ │ ├── lib # root directory for libraries
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│ │ │ ├── README.md
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│ │ │ ├── conduit # Conduit Library - HealthCare provider communication layer (FHIR protocol)
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│ │ │ │ ├── fhir # contains healthcare provider specific FHIR clients
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│ │ │ ├── database # Database Library - PouchDB/CouchDB client, compatible with web-worker and browser env
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│ │ │ │ ├── plugins
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│ │ │ │ └── pouchdb_repository.ts
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│ │ │ ├── models
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│ │ │ │ ├── database # Classes used to store data in CouchDB
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│ │ │ │ ├── fasten
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│ │ │ │ └── lighthouse # Classes used to communicate with Lighthouse API
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│ │ │ └── utils
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│ │ ├── styles.scss # Main sylesheet
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```
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## Backend
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The backend is incredibly simple (by design). The hope is to remove it completely if possible, allowing Fasten to be served by
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a CDN or minimal Nginx deployment.
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```tree
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├── backend
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│ ├── cmd
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│ └── pkg
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│ ├── config
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│ ├── database # contains CouchDB client, allowing creation of new Users (and associated databases)
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│ ├── errors
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│ ├── models
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│ └── web
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│ ├── handler # contains code for API endpoints
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│ │ ├── auth.go # authentication endpoints (create new user)
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│ │ ├── cors_proxy.go # CORS proxy/relay for communicating with healthcare providers who do not support CORS
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│ │ ├── couchdb_proxy.go # reverse proxy for CouchDB api, allowing for database API to be exposed (with limitations)
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│ │ └── metadata.go # API endpoint returning metadata for healthcare providers
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```
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## Distribution/Docker
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```tree
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├── docker-compose.yml # docker-compose file which can be used to compile and run "all-in-one" image
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├── Dockerfile # dockerfile for "all-in-one" image, containing frontend, backend & database
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├── docker
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│ ├── README.md
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│ ├── couchdb
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│ │ ├── Dockerfile # dockerfile for "couchdb" only image, used for development
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│ │ └── local.ini
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│ └── rootfs # filesystem configs, used in Dockerfiles to setup s6-overlay service manager
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│ └── etc
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│ ├── cont-init.d
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│ │ ├── 01-timezone
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│ │ └── 50-couchdb-init
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│ └── services.d
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│ ├── couchdb
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│ └── fasten
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```
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# FAQ
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### How do I run individual frontend tests?
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- ng test --include='**/base_client.spec.ts'
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- ng test --include='lib/**/*.spec.ts'
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### How do I change the default encryption key and admin credentials
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- FASTEN_ISSUER_JWT_KEY
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### Generate JWT for local use
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```bash
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curl -X POST http://localhost:9090/api/auth/signup -H 'Content-Type: application/json' -d '{"username":"user1","password":"user1"}'
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curl -X POST http://localhost:9090/api/auth/signin -H 'Content-Type: application/json' -d '{"username":"user1","password":"user1"}'
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curl -H "Authorization: Bearer ${JWT_TOKEN_HERE}" http://localhost:5984/_session
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```
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# Run Component Storybook
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```bash
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ng run fastenhealth:storybook
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```
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# Access Encrypted SQLite Database with IntelliJ
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- Download the latest `sqlite-jdbc-crypt` jar from https://github.com/Willena/sqlite-jdbc-crypt/releases
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- Open IntelliJ -> Data Source Properties -> Driver Tab
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- Find & Select `Sqlite` -> Right Click -> Duplicate
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- Rename to `Sqlite (Encrypted)`
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- Find `Driver Files` -> Select `sqlite-jdbc-crypt` jar that you downloaded previously
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- Remove `Xerial Sqlite JDBC` jar
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- Click `Apply` -> Click `OK`
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- Create New Data Source -> Select `Sqlite (Encrypted)` -> Change Connection Type to `Url only`
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- Specify the following connection url: `jdbc:sqlite:fasten.db?cipher=sqlcipher&legacy=3&hmac_use=0&kdf_iter=4000&legacy_page_size=1024&key=123456789012345678901234567890`
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- Replace `key` with the encryption key specified in your config file (`database.encryption_key`)
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- Click `Test Connection` -> Should be successful
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- Click `Apply` -> Click `OK`
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# Flush SQLite Write-Ahead-Log (WAL) to Database
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```sqlite
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PRAGMA wal_checkpoint(TRUNCATE);
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```
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See: https://sqlite.org/forum/info/fefd56014e2135589ea57825b0e2aa3e2df5daf53b5e41aa6a9d8f0c29d0b8e5
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TODO: check if https://www.sqlite.org/pragma.html#pragma_wal_checkpoint can be used to do this automatically.
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