Add getSubFeeds to feeds

packages/feeds/compiler.ts

@@ -2,31 +2,24 @@ import {uniq, now, isNil} from '@coracle.social/lib'
 import type {Rumor, Filter} from '@coracle.social/util'
 import {Tags, getIdFilters, mergeFilters} from '@coracle.social/util'
 import type {RequestItem, DVMItem, Scope, Feed, DynamicFilter, FeedOptions} from './core'
-import {FeedType} from './core'
+import {FeedType, getSubFeeds} from './core'
 
 export class FeedCompiler<E extends Rumor> {
   constructor(readonly options: FeedOptions<E>) {}
 
-  walk([type, ...feed]: Feed, visit: (feed: Feed) => void) {
-    visit([type, ...feed] as Feed)
+  walk(feed: Feed, visit: (feed: Feed) => void) {
+    visit(feed)
 
-    switch(type) {
-      case FeedType.Difference:
-      case FeedType.Intersection:
-      case FeedType.SymmetricDifference:
-      case FeedType.Union:
-        for (const subFeed of feed) {
-          this.walk(subFeed as Feed, visit)
-        }
+    for (const subFeed of getSubFeeds(feed)) {
+      this.walk(subFeed, visit)
     }
   }
 
   canCompile([type, ...feed]: Feed): boolean {
     switch(type) {
       case FeedType.Relay:
-        return (feed.slice(1) as Feed[]).every(this.canCompile)
       case FeedType.Union:
-        return (feed as Feed[]).every(this.canCompile)
+        return getSubFeeds([type, ...feed] as Feed).every(this.canCompile)
       case FeedType.Filter:
       case FeedType.List:
       case FeedType.LOL:

packages/feeds/core.ts

@@ -13,10 +13,11 @@ export enum FeedType {
 }
 
 export enum Scope {
-  Self = "self",
-  Global = "global",
-  Follows = "follows",
   Followers = "followers",
+  Follows = "follows",
+  Global = "global",
+  Network = "network",
+  Self = "self",
 }
 
 export type DynamicFilter = Filter & {
@@ -59,6 +60,20 @@ export const listFeed = (...addresses: string[]) => [FeedType.List, ...addresses
 export const lolFeed = (...addresses: string[]) => [FeedType.LOL, ...addresses] as Feed
 export const dvmFeed = (...requests: DVMItem[]) => [FeedType.DVM, ...requests] as Feed
 
+export const getSubFeeds = ([type, ...feed]: Feed): Feed[] => {
+  switch (type) {
+    case FeedType.Relay:
+      return feed.slice(1) as Feed[]
+    case FeedType.Difference:
+    case FeedType.Intersection:
+    case FeedType.SymmetricDifference:
+    case FeedType.Union:
+      return feed as Feed[]
+    default:
+      return []
+  }
+}
+
 export type RequestItem = {
   relays: string[]
   filters: Filter[]

packages/feeds/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@coracle.social/feeds",
-  "version": "0.0.1",
+  "version": "0.0.2",
   "author": "hodlbod",
   "license": "MIT",
   "description": "Utilities for building dynamic nostr feeds.",