package net.pterodactylus.rhynodge.filters.webpages.epicgames

import net.pterodactylus.rhynodge.Merger
import net.pterodactylus.rhynodge.State

class EpicGamesMerger : Merger {

	override fun mergeStates(previousState: State, currentState: State): State {
		previousState as? FreeGamesState ?: throw IllegalArgumentException("previousState is not a FreeGamesState")
		currentState as? FreeGamesState ?: throw IllegalArgumentException("currentState is not a FreeGamesState")

		val oldGames = previousState.games
		val newGames = currentState.games

		return FreeGamesState(newGames, (newGames - oldGames).isNotEmpty())
	}

}