33 lines
717 B
TypeScript
33 lines
717 B
TypeScript
import { makeReducer } from "../../libraries/reducer.ts";
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import { EventStoreFactory } from "./events.ts";
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export const userPostReducer = makeReducer<EventStoreFactory, UserPostState>(
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(state, event) => {
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switch (event.type) {
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case "post:created": {
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state.posts.push({ id: event.stream, author: event.meta.auditor });
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state.count += 1;
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break;
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}
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case "post:removed": {
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state.posts = state.posts.filter(({ id }) => id !== event.stream);
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state.count -= 1;
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break;
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}
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}
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return state;
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},
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() => ({
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posts: [],
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count: 0,
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}),
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);
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type UserPostState = {
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posts: {
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id: string;
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author: string;
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}[];
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count: number;
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};
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