Add special handling of the mod authorities

src/lib/moderation.ts

@@ -3,6 +3,9 @@ import {
   ModerationUI,
   InterpretedLabelValueDefinition,
   LABELS,
+  AppBskyLabelerDefs,
+  BskyAgent,
+  ModerationOpts,
 } from '@atproto/api'
 
 import {sanitizeDisplayName} from '#/lib/strings/display-names'
@@ -50,3 +53,29 @@ export function lookupLabelValueDefinition(
   }
   return def
 }
+
+export function isModAuthority(
+  labeler:
+    | string
+    | AppBskyLabelerDefs.LabelerView
+    | AppBskyLabelerDefs.LabelerViewDetailed,
+): boolean {
+  if (typeof labeler === 'string') {
+    return BskyAgent.modAuthoritiesHeader.includes(labeler)
+  }
+  return BskyAgent.modAuthoritiesHeader.includes(labeler.creator.did)
+}
+
+export function isLabelerSubscribed(
+  labeler:
+    | string
+    | AppBskyLabelerDefs.LabelerView
+    | AppBskyLabelerDefs.LabelerViewDetailed,
+  modOpts: ModerationOpts,
+) {
+  labeler = typeof labeler === 'string' ? labeler : labeler.creator.did
+  if (isModAuthority(labeler)) {
+    return true
+  }
+  return modOpts.prefs.labelers.find(l => l.did === labeler)
+}