mirror of
https://github.com/owncast/owncast.git
synced 2024-11-24 21:59:43 +03:00
188 lines
6.5 KiB
Markdown
188 lines
6.5 KiB
Markdown
# Owncast Backend Architecture
|
|
|
|
This is a work in progress document detailing the future backend architecture of Owncast. It should be seen as a living document until a refactor of the backend is complete.
|
|
|
|
## Dependencies
|
|
|
|
Dependencies are services that are required across the application. This can be things like the chat service or a data repository for config values or user data.
|
|
|
|
Note: A better name that "dependencies" might be clearer. Perhaps "services" or "providers".
|
|
|
|
TODO: Have a complete list of dependencies.
|
|
|
|
### Data Repositories
|
|
|
|
The repository pattern provides a layer of abstraction between the application and the data store, allowing the application to interact with the data store through a well-defined interface, rather than directly accessing the data store. This helps to decouple the application from the data store.
|
|
|
|
TODO: List out the repositories and what they do.
|
|
|
|
Learn more about the [repository pattern](https://techinscribed.com/different-approaches-to-pass-database-connection-into-controllers-in-golang/).
|
|
|
|
### Application Controller
|
|
|
|
The `AppController` has references to all the dependencies and serves as an arbiter between consumers of these services and the services themselves.
|
|
|
|
A reference to the `AppController` is passed in to the all the core functionality in the application and each package would have its own interface that `AppController` implements. This can include getting access to dependency services like getting access to the chat service, getting access to the config repository values or knowing application state such as if a stream is live or how many viewers are watching via metrics.
|
|
|
|
TODO: Show examples of how the application is passed in to packages and how to reference dependencies through it.
|
|
|
|
## Diagram
|
|
|
|
```mermaid
|
|
%% Owncast backend architecture.
|
|
%% See https://jojozhuang.github.io/tutorial/mermaid-cheat-sheet/
|
|
%% for a cheat sheet on creating this diagram.
|
|
%% Paste this document in https://mermaid.live as a quick way to edit.
|
|
|
|
%% TODO: Add links between nodes and the actual code.
|
|
|
|
%% This is a graph style diagram, Top Down.
|
|
graph TD
|
|
|
|
|
|
%% Define Nodes and Subgraphs
|
|
|
|
subgraph VideoPipeline[Video Pipeline]
|
|
VideoTranscoder(fa:fa-video Video Transcoder)
|
|
RTMPService[fa:fa-video RTMP Service]
|
|
end
|
|
|
|
subgraph ChatService[fa:fa-comment Chat\nService]
|
|
end
|
|
|
|
subgraph Dependencies
|
|
|
|
App{AppController}
|
|
ChatService--->App
|
|
Webhooks--->App
|
|
ActivityPubOutboundHandlers[fa:fa-hashtag ActivityPub\nOutbound]--->App
|
|
|
|
ConfigRepository(fa:fa-hard-drive Config\nRepository)--->App
|
|
UserRepository(fa:fa-hard-drive User\nRepository)--->App
|
|
NotificationsRepository(fa:fa-hard-drive Notifications\nRepository)--->App
|
|
ChatRepository(fa:fa-hard-drive Chat\nRepository)
|
|
APRepository(fa:fa-hard-drive ActivityPub\nRepository)
|
|
|
|
Database(fa:fa-hard-drive Database)--->ConfigRepository
|
|
Database--->UserRepository
|
|
Database--->APRepository
|
|
Database--->NotificationsRepository
|
|
|
|
ChatRepository-->ChatService
|
|
|
|
ApplicationState(fa:fa-list Application\nState)--->App
|
|
GeoIP(fa:fa-globe GeoIP\nLookup)--->App
|
|
Statistics(fa:fa-list Statistics)--->App
|
|
OutboundWebhooks[Outbound\nWebhooks]--->App
|
|
|
|
end
|
|
|
|
subgraph VideoStorageProviders[Video Storage Providers]
|
|
LocalStorage((fa:fa-hard-drive Local\nStorage))
|
|
S3Storage((fa:fa-hard-drive S3\nStorage))
|
|
end
|
|
|
|
subgraph Authentication[Chat Authentication]
|
|
IndieAuth[fa:fa-key IndieAuth]
|
|
FediAuth[fa:fa-key FediAuth]
|
|
end
|
|
|
|
subgraph Notifications[External Notifications]
|
|
DiscordNotifier[fa:fa-comment Discord]
|
|
BrowserNotifier[fa:fa-browser Browser]
|
|
end
|
|
|
|
subgraph WebServer[Web Server]
|
|
ActivityPubHandlers[fa:fa-file ActivityPub\nHandlers]
|
|
|
|
subgraph WebAssets[Web Assets]
|
|
EmbeddedStaticFiles((fa:fa-file Embedded\nStatic Assets))
|
|
OnDiskStaticFiles((fa:fa-file On Disk\nStatic Assets))
|
|
WebApplication[fa:fa-file Web\nApplication]
|
|
PublicFiles[fa:fa-file Public\nDirectory]
|
|
end
|
|
|
|
subgraph HTTPHandlers[fa:fa-browser HTTP Handlers]
|
|
AdminAPIs[Admin\nAPIs]
|
|
ThirdPartyAPIs[3rd Party\nAPIs]
|
|
WebSocket[WebSocket]
|
|
subgraph ChatAPIs[Chat\nAPIs]
|
|
ChatUserRegistration[Chat User\nRegistration]
|
|
Emoji[Emojis]
|
|
subgraph ChatAuthAPIs[Chat\nAuthentication]
|
|
FediAuth
|
|
IndieAuth
|
|
end
|
|
end
|
|
subgraph VideoAPIs[fa:fa-video Video APIs]
|
|
ViewerPing[Viewer\nPing]
|
|
PlaybackMetrics[Playback\nHealth Metrics]
|
|
end
|
|
ActivityPubHandlers
|
|
ApplicationConfig[Application\nConfig]
|
|
ApplicationStatus[Application\nStatus]
|
|
Directory[Directory\nAPI]
|
|
Followers[Followers]
|
|
end
|
|
end
|
|
|
|
subgraph Streamer
|
|
BroadcastingSoftware>fa:fa-video Broadcasting\nSoftware]
|
|
end
|
|
|
|
%% All the services and packages require access
|
|
%% to dependencies through a Application reference.
|
|
App-.->HTTPHandlers
|
|
App-.->VideoPipeline
|
|
App-.->ActivityPub
|
|
App-.->Authentication
|
|
App-.->Notifications
|
|
App-.->DirectoryNotifier[Owncast\nDirectory]
|
|
|
|
LocalStorage--HLS-->OnDiskStaticFiles
|
|
|
|
RTMPService>RTMP Ingest]--RTMP-->VideoTranscoder
|
|
VideoTranscoder--HLS-->VideoStorageProviders
|
|
|
|
%% Streamers
|
|
BroadcastingSoftware--RTMP-->RTMPService
|
|
|
|
%% Style the nodes
|
|
|
|
%% Define reusable styles for node types
|
|
classDef bigtext font-weight:bold,font-size:40px
|
|
classDef repository fill:#4F625B,color:#fff
|
|
classDef webservice fill:#6082B6,color:#fff
|
|
classDef rtmp fill:#608200, color:#fff
|
|
classDef inbound fill:#6544e9,stoke:#fff,color:#fff
|
|
classDef outboundservice fill:#2386e2,stroke:green,color:#fff
|
|
classDef storage fill:#42bea6,color:#fff
|
|
|
|
%% Assign styles to nodes
|
|
class App bigtext
|
|
class UserRepository repository
|
|
class ConfigRepository repository
|
|
class APRepository repository
|
|
class NotificationsRepository repository
|
|
class ChatRepository repository
|
|
|
|
class HTTPHandlers inbound
|
|
class ActivityPubInboundHandlers inbound
|
|
class InboundWebhooks inbound
|
|
|
|
class ActivityPubOutboundHandlers outboundservice
|
|
class DiscordNotifier outboundservice
|
|
class BrowserNotifier outboundservice
|
|
class OutboundWebhooks outboundservice
|
|
class DirectoryNotifier outboundservice
|
|
|
|
class BroadcastingSoftware rtmp
|
|
class RTMPService rtmp
|
|
|
|
class Database storage
|
|
class LocalStorage storage
|
|
class S3Storage storage
|
|
|
|
%% Customize the theme styles
|
|
%%{init: {'theme':'base', 'themeVariables': {'darkMode': true, 'lineColor': '#c3dafe', 'tertiaryTextColor': 'white', 'clusterBkg': '#2d3748', 'primaryTextColor': '#39373d', "edgeLabelBackground": "white", "fontFamily": "monospace", "fontSize": "30px"}}}%%
|
|
```
|