hexmap/client/src/reducers/AppStateReducer.ts

import {AppAction} from "../../../common/src/actions/AppAction";
import {AppState} from "../state/AppState";
import {isTileAction} from "../../../common/src/actions/TileAction";
import {tileReducer} from "./TileReducer";
import {networkReducer} from "./NetworkReducer";
import {CLIENT_PENDING, isSendableAction} from "../../../common/src/actions/ClientAction";
import {syncedStateReducer} from "../../../common/src/reducers/SyncedStateReducer";
import {exhaustivenessCheck} from "../../../common/src/util/TypeUtils";
import {isMapAction, MapAction} from "../../../common/src/actions/MapAction";
import {isUserAction, UserAction} from "../../../common/src/actions/UserAction";
import {clientReducer} from "./ClientReducer";
import {isNetworkAction} from "../../../common/src/actions/NetworkAction";

function appSyncedStateReducer(oldState: AppState, action: MapAction|UserAction): AppState {
    if (oldState.localState === null) {
        return oldState
    }
    const localState = syncedStateReducer(oldState.localState, action)
    if (localState === oldState.localState) {
        return oldState
    }
    if (isSendableAction(action)) {
        return {
            ...oldState,
            localState,
            network: clientReducer(oldState.network, {
                type: CLIENT_PENDING,
                pending: action
            })
        }
    } else {
        return {
            ...oldState,
            localState
        }
    }
}

export function appStateReducer(oldState: AppState, action: AppAction): AppState {
    if (isMapAction(action) || isUserAction(action)) {
        return appSyncedStateReducer(oldState, action)
    } else if (isTileAction(action)) {
        return tileReducer(oldState, action)
    } else if (isNetworkAction(action)) {
        return networkReducer(oldState, action)
    }
    exhaustivenessCheck(action)
}

export type AppStateReducer = typeof appStateReducer;