Files
searxng/client/simple/src/js/Plugin.ts
Ivan Gabaldon fb089ae297 [mod] client/simple: client plugins (#5406)
* [mod] client/simple: client plugins

Defines a new interface for client side *"plugins"* that coexist with server
side plugin system. Each plugin (e.g., `InfiniteScroll`) extends the base
`ts Plugin`. Client side plugins are independent and lazy‑loaded via `router.ts`
when their `load()` conditions are met. On each navigation request, all
applicable plugins are instanced.

Since these are client side plugins, we can only invoke them once DOM is fully
loaded. E.g. `Calculator` will not render a new `answer` block until fully
loaded and executed.

For some plugins, we might want to handle its availability in `settings.yml`
and toggle in UI, like we do for server side plugins. In that case, we extend
`py Plugin` instancing only the information and then checking client side if
[`settings.plugins`](1ad832b1dc/client/simple/src/js/toolkit.ts (L134))
array has the plugin id.

* [mod] client/simple: rebuild static
2025-12-02 10:18:00 +00:00

67 lines
1.5 KiB
TypeScript

// SPDX-License-Identifier: AGPL-3.0-or-later
/**
* Base class for client-side plugins.
*
* @remarks
* Handle conditional loading of the plugin in:
*
* - client/simple/src/js/router.ts
*
* @abstract
*/
export abstract class Plugin {
/**
* Plugin name.
*/
protected readonly id: string;
/**
* @remarks
* Don't hold references of this instance outside the class.
*/
protected constructor(id: string) {
this.id = id;
void this.invoke();
}
private async invoke(): Promise<void> {
try {
console.debug(`[PLUGIN] ${this.id}: Running...`);
const result = await this.run();
if (!result) return;
console.debug(`[PLUGIN] ${this.id}: Running post-exec...`);
// @ts-expect-error
void (await this.post(result as NonNullable<Awaited<ReturnType<this["run"]>>>));
} catch (error) {
console.error(`[PLUGIN] ${this.id}:`, error);
} finally {
console.debug(`[PLUGIN] ${this.id}: Done.`);
}
}
/**
* Plugin goes here.
*
* @remarks
* The plugin is already loaded at this point. If you wish to execute
* conditions to exit early, consider moving the logic to:
*
* - client/simple/src/js/router.ts
*
* ...to avoid unnecessarily loading this plugin on the client.
*/
protected abstract run(): Promise<unknown>;
/**
* Post-execution hook.
*
* @remarks
* The hook is only executed if `#run()` returns a truthy value.
*/
// @ts-expect-error
protected abstract post(result: NonNullable<Awaited<ReturnType<this["run"]>>>): Promise<void>;
}