Get rid of domain module, allow app to override default event type

packages/util/src/Handler.ts

@@ -0,0 +1,48 @@
+import {fromPairs, last, first, parseJson} from "@welshman/lib"
+import {getAddress} from "./Address"
+import {getAddressTags, getKindTagValues} from "./Tags"
+import type {CustomEvent} from "./Events"
+
+export type Handler = {
+  kind: number
+  name: string
+  about: string
+  image: string
+  identifier: string
+  event: CustomEvent
+  website?: string
+  lud16?: string
+  nip05?: string
+}
+
+export const readHandlers = (event: CustomEvent) => {
+  const {d: identifier} = fromPairs(event.tags)
+  const meta = parseJson(event.content)
+  const normalizedMeta = {
+    name: meta?.name || meta?.display_name || "",
+    image: meta?.image || meta?.picture || "",
+    about: meta?.about || "",
+    website: meta?.website || "",
+    lud16: meta?.lud16 || "",
+    nip05: meta?.nip05 || "",
+  }
+
+  // If our meta is missing important stuff, don't bother showing it
+  if (!normalizedMeta.name || !normalizedMeta.image) {
+    return []
+  }
+
+  return getKindTagValues(event.tags)
+    .map(kind => ({...normalizedMeta, kind: parseInt(kind), identifier, event})) as Handler[]
+}
+
+export const getHandlerKey = (handler: Handler) => `${handler.kind}:${getAddress(handler.event)}`
+
+export const displayHandler = (handler?: Handler, fallback = "") => handler?.name || fallback
+
+export const getHandlerAddress = (event: CustomEvent) => {
+  const tags = getAddressTags(event.tags)
+  const tag = tags.find(t => last(t) === "web") || first(tags)
+
+  return tag?.[1]
+}