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feat: draft zustand state management system
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| import { create } from "zustand"; | ||
| import { immer } from "zustand/middleware/immer"; | ||
| import { Draft, Patch, applyPatches, produceWithPatches } from "immer"; | ||
| import { ParsedEntity } from "@dojoengine/sdk"; | ||
| import { Schema } from "./bindings"; | ||
|
|
||
| import { enablePatches } from "immer"; | ||
| enablePatches(); | ||
|
|
||
| interface PendingTransaction { | ||
| transactionId: string; | ||
| patches: Patch[]; | ||
| inversePatches: Patch[]; | ||
| } | ||
|
|
||
| interface GameState { | ||
| entities: Record<string, ParsedEntity<Schema>>; | ||
| pendingTransactions: Record<string, PendingTransaction>; | ||
| setEntities: (entities: ParsedEntity<Schema>[]) => void; | ||
| updateEntity: (entity: ParsedEntity<Schema>) => void; | ||
| applyOptimisticUpdate: ( | ||
| transactionId: string, | ||
| updateFn: (draft: Draft<GameState>) => void | ||
| ) => void; | ||
| revertOptimisticUpdate: (transactionId: string) => void; | ||
| confirmTransaction: (transactionId: string) => void; | ||
| subscribeToEntity: ( | ||
| entityId: string, | ||
| listener: (entity: ParsedEntity<Schema> | undefined) => void | ||
| ) => () => void; | ||
| waitForEntityChange: ( | ||
| entityId: string, | ||
| predicate: (entity: ParsedEntity<Schema> | undefined) => boolean, | ||
| timeout?: number | ||
| ) => Promise<ParsedEntity<Schema> | undefined>; | ||
| } | ||
|
|
||
| export const useGameState = create<GameState>()( | ||
| immer((set, get) => ({ | ||
| entities: {}, | ||
| pendingTransactions: {}, | ||
| setEntities: (entities: ParsedEntity<Schema>[]) => { | ||
| set((state) => { | ||
| entities.forEach((entity) => { | ||
| state.entities[entity.entityId] = entity; | ||
| }); | ||
| }); | ||
| }, | ||
| updateEntity: (entity: ParsedEntity<Schema>) => { | ||
| set((state) => { | ||
| state.entities[entity.entityId] = entity; | ||
| }); | ||
| }, | ||
| applyOptimisticUpdate: (transactionId, updateFn) => { | ||
| const currentState = get(); | ||
| const [nextState, patches, inversePatches] = produceWithPatches( | ||
| currentState, | ||
| (draft) => { | ||
| updateFn(draft); | ||
| } | ||
| ); | ||
|
|
||
| set(() => nextState); | ||
|
|
||
| set((state) => { | ||
| state.pendingTransactions[transactionId] = { | ||
| transactionId, | ||
| patches, | ||
| inversePatches, | ||
| }; | ||
| }); | ||
| }, | ||
| revertOptimisticUpdate: (transactionId) => { | ||
| const transaction = get().pendingTransactions[transactionId]; | ||
| if (transaction) { | ||
| set((state) => applyPatches(state, transaction.inversePatches)); | ||
| set((state) => { | ||
| delete state.pendingTransactions[transactionId]; | ||
| }); | ||
| } | ||
| }, | ||
| confirmTransaction: (transactionId) => { | ||
| set((state) => { | ||
| delete state.pendingTransactions[transactionId]; | ||
| }); | ||
| }, | ||
| subscribeToEntity: (entityId, listener): (() => void) => { | ||
| const unsubscribe: () => void = useGameState.subscribe((state) => { | ||
| const entity = state.entities[entityId]; | ||
| listener(entity); | ||
| }); | ||
| return unsubscribe; | ||
| }, | ||
| waitForEntityChange: (entityId, predicate, timeout = 6000) => { | ||
| return new Promise<ParsedEntity<Schema> | undefined>( | ||
| (resolve, reject) => { | ||
| const unsubscribe = useGameState.subscribe((state) => { | ||
| const entity = state.entities[entityId]; | ||
| if (predicate(entity)) { | ||
| clearTimeout(timer); | ||
| unsubscribe(); | ||
| resolve(entity); | ||
| } | ||
| }); | ||
|
|
||
| const timer = setTimeout(() => { | ||
| unsubscribe(); | ||
| reject( | ||
| new Error( | ||
| `waitForEntityChange: Timeout of ${timeout}ms exceeded` | ||
| ) | ||
| ); | ||
| }, timeout); | ||
| } | ||
| ); | ||
| }, | ||
| })) | ||
| ); |
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