[wip] so close; check the ws messages

pkg/shared/kefir.ts

@@ -1,37 +0,0 @@
-import { merge, Observable } from "kefir";
-
-export type ValueWithin<O extends Observable<any, any>> = Parameters<
-	Parameters<O["map"]>[0]
->[0];
-
-type Mutation<A, O extends Observable<any, any>> = [
-	O,
-	(prev: A, value: ValueWithin<O>) => A
-];
-
-export const multiScan = <A, M extends Mutation<A, any>[]>(
-	initValue: A,
-	...mutations: M
-): Observable<A, any> =>
-	merge(
-		mutations.map(([source, mutation]) =>
-			source.map((event) => ({ event, mutation }))
-		)
-	).scan((prev, { event, mutation }) => mutation(prev, event), initValue);
-
-export const partition =
-	<C extends readonly [...string[]], T, E>(
-		classes: C,
-		partitionFn: (v: T) => C[number]
-	) =>
-	(obs: Observable<T, E>) => {
-		const assigned = obs.map((obj) => ({ obj, cls: partitionFn(obj) }));
-		return Object.fromEntries(
-			classes.map((C) => [
-				C,
-				assigned.filter(({ cls }) => cls == C).map(({ obj }) => obj),
-			])
-		);
-	};
-
-export const isEmpty = (container: { length: number }) => container.length == 0;

pkg/shared/kefirs.ts

@@ -0,0 +1,52 @@
+import { merge, Observable } from "kefir";
+import Bus from "kefir-bus";
+
+export type ValueWithin<O extends Observable<any, any>> = Parameters<
+	Parameters<O["map"]>[0]
+>[0];
+
+type Mutation<A, O extends Observable<any, any>> = [
+	O,
+	(prev: A, value: ValueWithin<O>) => A
+];
+
+export const multiScan = <A, M extends Mutation<A, any>[]>(
+	initValue: A,
+	...mutations: M
+): Observable<A, any> =>
+	merge(
+		mutations.map(([source, mutation]) =>
+			source.map((event) => ({ event, mutation }))
+		)
+	).scan((prev, { event, mutation }) => mutation(prev, event), initValue);
+
+export const partition = <
+	C extends readonly [...string[]],
+	T extends { [key: string]: any },
+	E
+>(
+	classes: C,
+	obs: Observable<T, E>
+) => {
+	const classBuses = Object.fromEntries(classes.map((c) => [c, Bus()]));
+	obs.onValue((v) => {
+		for (const _class of classes) {
+			if (_class in v) {
+				classBuses[_class].emit(v);
+				return;
+			}
+		}
+	});
+	return classBuses;
+};
+
+export const isEmpty = (container: { length: number }) => container.length == 0;
+
+export const setDiff = <T>(
+	sets: [Set<T>, s2: Set<T>]
+): { added: T[]; removed: T[] } => ({
+	added: [...sets[1].difference(sets[0])],
+	removed: [...sets[0].difference(sets[1])],
+});
+
+export const set = <T>(arr: T[]) => new Set<T>(arr);

pkg/shared/package.json

@@ -3,9 +3,11 @@
 	"version": "1.0.0",
 	"dependencies": {
 		"kefir": "^3.8.8",
+		"kefir-bus": "^2.3.1",
 		"object-hash": "^3.0.0"
 	},
 	"devDependencies": {
-		"@types/kefir": "^3.8.11"
+		"@types/kefir": "^3.8.11",
+		"ts-xor": "^1.3.0"
 	}
 }

pkg/shared/tsconfig.json

@@ -1,6 +1,9 @@
 {
 	"extends": "../../tsconfig.json",
 	"compilerOptions": {
-		"esModuleInterop": true
+		"esModuleInterop": true,
+		"target": "esnext",
+		"moduleResolution": "nodenext",
+		"module": "nodenext"
 	}
 }