Jon Staab
71 lines
2.1 KiB
TypeScript
71 lines
2.1 KiB
TypeScript
import {Scope, FeedController} from "@welshman/feeds"
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import type {FeedControllerOptions, Feed} from "@welshman/feeds"
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import type {AdapterContext} from "@welshman/net"
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import type {ClientContext} from "./client.js"
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import type {Wot} from "./wot.js"
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export type MakeFeedControllerOptions = Partial<Omit<FeedControllerOptions, "feed">> & {feed: Feed}
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/**
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* Builds `FeedController`s wired to this client. Scope/WOT pubkey resolution is
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* delegated to the injected `Wot`, and feeds fetch through THIS client's net
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* context (pool + repository) rather than the global one.
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*/
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export class Feeds {
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constructor(
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readonly ctx: ClientContext,
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readonly wot: Wot,
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) {}
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getPubkeysForScope = (scope: Scope): string[] => {
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const $pubkey = this.ctx.user?.pubkey
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if (!$pubkey) {
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return []
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}
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switch (scope) {
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case Scope.Self:
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return [$pubkey]
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case Scope.Follows:
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return this.wot.getFollows($pubkey)
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case Scope.Network:
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return this.wot.getNetwork($pubkey)
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case Scope.Followers:
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return this.wot.getFollowers($pubkey)
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default:
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return []
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}
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}
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getPubkeysForWOTRange = (min: number, max: number): string[] => {
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const pubkeys = []
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const $maxWot = this.wot.getMaxWot() ?? 0
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const thresholdMin = $maxWot * min
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const thresholdMax = $maxWot * max
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for (const [tpk, score] of this.wot.getWotGraph().entries()) {
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if (score >= thresholdMin && score <= thresholdMax) {
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pubkeys.push(tpk)
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}
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}
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return pubkeys
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}
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// The net seam: route feed requests through this client's pool/repository so
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// feeds fetch through THIS client rather than the global net context.
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get netContext(): AdapterContext {
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return {pool: this.ctx.pool, repository: this.ctx.repository}
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}
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makeFeedController = (options: MakeFeedControllerOptions) =>
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new FeedController({
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getPubkeysForScope: this.getPubkeysForScope,
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getPubkeysForWOTRange: this.getPubkeysForWOTRange,
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signer: this.ctx.user?.signer,
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context: this.netContext,
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...options,
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})
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}
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