How to use other Angular2 service inside an ngrx/Store reducer?

New to both ngrx/Store and reducer. Basically, I have this reducer:

import {StoreData, INITIAL_STORE_DATA} from "../store-data";
import {Action} from "@ngrx/store";
import {
USER_THREADS_LOADED_ACTION, UserThreadsLoadedAction, SEND_NEW_MESSAGE_ACTION,
SendNewMessageAction
} from "../actions";
import * as _ from "lodash";
import {Message} from "../../shared-vh/model/message";
import {ThreadsService} from "../../shared-vh/services/threads.service";

export function storeData(state: StoreData = INITIAL_STORE_DATA, action: Action): StoreData {


switch (action.type) {

case SEND_NEW_MESSAGE_ACTION:
return handleSendNewMessageAction(state, action);

default:
return state
}
}

function handleSendNewMessageAction(state:StoreData, action:SendNewMessageAction): StoreData {

const newStoreData = _.cloneDeep(state);

const currentThread = newStoreData.threads[action.payload.threadId];

const newMessage: Message = {
text: action.payload.text,
threadId: action.payload.threadId,
timestamp: new Date().getTime(),
participantId: action.payload.participantId,
id: [need a function from this service: ThreadsService]
}

currentThread.messageIds.push(newMessage.id);

newStoreData.messages[newMessage.id] = newMessage;

return newStoreData;
}


The problem is within the reducer function, I do not know how to inject an injectable service I created in a different file and use the function within it. The id part - I need to generate a firebase push ID using function like this.threadService.generateID() ...

But since this is a function, I do not have a constructor to use DI and I have no idea how to get functions within threadService!

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