Add relay package

packages/util/src/Relay.ts

@@ -1,15 +1,7 @@
-import {last, Emitter, normalizeUrl, sleep, stripProtocol} from "@welshman/lib"
-import {matchFilters} from "./Filters.js"
-import type {Repository} from "./Repository.js"
-import type {Filter} from "./Filters.js"
-import type {HashedEvent, TrustedEvent} from "./Events.js"
+import {last, normalizeUrl, stripProtocol} from "@welshman/lib"
 
 // Constants and types
 
-export const LOCAL_RELAY_URL = "local://welshman.relay/"
-
-export const BOGUS_RELAY_URL = "bogus://welshman.relay/"
-
 export type RelayProfile = {
   url: string
   icon?: string
@@ -83,58 +75,3 @@ export const displayRelayUrl = (url: string) => last(url.split("://")).replace(/
 
 export const displayRelayProfile = (profile?: RelayProfile, fallback = "") =>
   profile?.name || fallback
-
-// In-memory relay implementation backed by Repository
-
-export class Relay<E extends HashedEvent = TrustedEvent> extends Emitter {
-  subs = new Map<string, Filter[]>()
-
-  constructor(readonly repository: Repository<E>) {
-    super()
-  }
-
-  send(type: string, ...message: any[]) {
-    switch (type) {
-      case "EVENT":
-        return this.handleEVENT(message as [E])
-      case "CLOSE":
-        return this.handleCLOSE(message as [string])
-      case "REQ":
-        return this.handleREQ(message as [string, ...Filter[]])
-    }
-  }
-
-  handleEVENT([event]: [E]) {
-    this.repository.publish(event)
-
-    // Callers generally expect async relays
-    void sleep(1).then(() => {
-      this.emit("OK", event.id, true, "")
-
-      if (!this.repository.isDeleted(event)) {
-        for (const [subId, filters] of this.subs.entries()) {
-          if (matchFilters(filters, event)) {
-            this.emit("EVENT", subId, event)
-          }
-        }
-      }
-    })
-  }
-
-  handleCLOSE([subId]: [string]) {
-    this.subs.delete(subId)
-  }
-
-  handleREQ([subId, ...filters]: [string, ...Filter[]]) {
-    this.subs.set(subId, filters)
-
-    // Callers generally expect async relays
-    void sleep(1).then(() => {
-      for (const event of this.repository.query(filters)) {
-        this.emit("EVENT", subId, event)
-      }
-
-      this.emit("EOSE", subId)
-    })
-  }
-}