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app.ts
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app.ts
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// @ts-ignore
const locreq = require("locreq")(__dirname);
import assert from "assert";
import { ActionName } from "../action";
import Mailer from "../email/mailer";
import * as Sealious from "../main";
import Emittery from "emittery";
import { runActionCurry } from "./run-action-curry";
import Datastore from "../datastore/datastore";
import Metadata from "./metadata";
import { SubjectPathEquiv } from "../data-structures/subject-path";
import { PartialConfig } from "./config";
import {
Collection,
Hookable,
SuperContext,
Context,
i18nFactory,
} from "../main";
import { ManifestData } from "./manifest";
import Collections from "./collections/collections";
import Logger from "./logger";
const default_config = locreq("default_config.json");
export type AppEvents = "starting" | "started" | "stopping" | "stopped";
/** The heart of your, well app. It all starts with `new App(...)` */
class App extends Hookable {
/** The current status of the app */
status: "stopped" | "running" | "starting" | "stopping";
/** The manifest assigned to this app. Stores things like the app name, domain, logo*/
manifest: Sealious.Manifest;
/** The function that's used to generate translated versions of phrases */
i18n: (phrase_id: string, params?: any) => string;
/** ConfigManager instance. It serves the config based on default values and the config object provided to the app constructor */
ConfigManager: Sealious.ConfigManager;
/** The {@link Logger} instance assigned to this application */
Logger: Logger;
/** Mailer configured according to the app's config */
Email: Mailer;
/** The server that runs the REST API routing and allows to add custom routes etc */
HTTPServer: Sealious.HttpServer;
/** The root subject of the app. It's where all subjects are derived from */
RootSubject: Sealious.Subject;
/** Performs an action within an app. The action is specified by the subject path, parametrized with params and ran under the given context */
runAction: (
context: Sealious.Context,
path: SubjectPathEquiv,
action: ActionName,
params?: any
) => Promise<any>;
/** The mongoDB client connected to the database specified in the app config */
Datastore: Datastore;
/** The Metadata manager assigned to this app. Used to store certain state information that's not meant to be shown to the user
* @internal
*/
Metadata: Metadata;
/** The emittery instance used to signal app state changes, like "started" or "stopped". It's not advised to use it directly, but rather to use the {@App.on} method
* @internal
*/
private e: Emittery;
/** The collections defined within the given app. */
collections: { [name: string]: Collection } = {};
/** A shorthand-way to create a new SuperContext: `new app.SuperContext()`. */
public SuperContext: new () => SuperContext;
/** A shorthand-way to create a new context: `new app.Context()`. */
public Context: new () => Context;
/** The app constructor.
* @param custom_config Specify the details, such as database address and the port to listen on. This is private information and won't be shown to user. See {@link Config}
* @param manifest Specify additional information, such as the URL, logo or the main color of the app. This is public information.
*/
constructor(custom_config: PartialConfig, manifest: ManifestData) {
super();
this.e = new Emittery();
this.status = "stopped";
this.manifest = new Sealious.Manifest(manifest);
this.manifest.validate();
this.i18n = i18nFactory(this.manifest.default_language);
this.ConfigManager = new Sealious.ConfigManager();
for (let key in default_config) {
this.ConfigManager.setDefault(key, default_config[key]);
}
this.ConfigManager.setRoot(custom_config);
this.Logger = new Logger();
this.Email = Sealious.EmailFactory(this);
this.HTTPServer = new Sealious.HttpServer(this);
this.RootSubject = new Sealious.RootSubject(this);
this.runAction = runActionCurry(this);
this.Datastore = new Datastore(this);
this.Metadata = new Sealious.MetadataFactory(this);
assert(
this.ConfigManager.get("upload_path"),
"'upload_path' not set in config"
);
for (const collection_id in Collections) {
//those functions call collection.fromDefinition somewhere down the road, which might prove problematic as we don't await them here
Collections[collection_id as keyof typeof Collections](this);
}
const app = this;
/** Shorthand way to create a {@link SuperContext} */
this.SuperContext = class extends SuperContext {
/** This constructor does not take any parameters as the {@link App} instance is automatically filled in */
constructor() {
super(app);
}
};
/** Shorthand way to create a {@link Context} */
this.Context = class extends Context {
/** This constructor does not take any parameters as the {@link App} instance is automatically filled in */
constructor() {
super(app);
}
};
}
/** Initializes all the collection fields, prepares all the hooks, connects to the database and starts the app, serving the REST API */
async start() {
this.status = "starting";
assert(
["dev", "production"].includes(
this.ConfigManager.get("core").environment
),
`"core.environment" config should be either "dev" or "production"`
);
for (const collection of Object.values(this.collections)) {
await collection.init();
}
await this.e.emit("starting");
await this.Datastore.start();
await this.Email.init();
await this.HTTPServer.start();
await this.e.emit("started");
this.status = "running";
return this;
}
/** Stops the HTTP server, disconnects from the DB */
async stop() {
this.status = "stopping";
await this.e.emit("stopping");
await this.HTTPServer.stop();
this.Datastore.stop();
this.status = "stopped";
await this.e.emit("stopped");
}
/** Removes all data inside the app. USE WITH CAUTION
* @internal
*/
async removeAllData() {
Object.keys(this.collections).map((collection_name) =>
this.Datastore.remove(collection_name, {}, "just_one" && false)
);
}
/** Allows to listen for basic app status change events */
async on(event_name: AppEvents, callback: () => void) {
this.e.on(event_name, callback);
}
/** registers a collection within the app
* @internal
*/
registerCollection(collection: Collection) {
this.collections[collection.name] = collection;
}
}
export default App;

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