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import { AssetBuyer, BuyQuote } from '@0x/asset-buyer';
import { AssetProxyId, ObjectMap } from '@0x/types';
import { BigNumber } from '@0x/utils';
import { Web3Wrapper } from '@0x/web3-wrapper';
import * as _ from 'lodash';
import { assetMetaDataMap } from '../data/asset_meta_data_map';
import {
Asset,
AssetMetaData,
AsyncProcessState,
DisplayStatus,
Network,
OrderProcessState,
OrderState,
} from '../types';
import { BigNumberInput } from '../util/big_number_input';
import { Action, ActionTypes } from './actions';
export interface State {
network: Network;
assetBuyer?: AssetBuyer;
assetMetaDataMap: ObjectMap<AssetMetaData>;
selectedAsset?: Asset;
availableAssets?: Asset[];
selectedAssetAmount?: BigNumberInput;
buyOrderState: OrderState;
ethUsdPrice?: BigNumber;
latestBuyQuote?: BuyQuote;
quoteRequestState: AsyncProcessState;
latestErrorMessage?: string;
latestErrorDisplayStatus: DisplayStatus;
}
export const INITIAL_STATE: State = {
network: Network.Mainnet,
selectedAssetAmount: undefined,
availableAssets: undefined,
assetMetaDataMap,
buyOrderState: { processState: OrderProcessState.NONE },
ethUsdPrice: undefined,
latestBuyQuote: undefined,
latestErrorMessage: undefined,
latestErrorDisplayStatus: DisplayStatus.Hidden,
quoteRequestState: AsyncProcessState.NONE,
};
export const reducer = (state: State = INITIAL_STATE, action: Action): State => {
switch (action.type) {
case ActionTypes.UPDATE_ETH_USD_PRICE:
return {
...state,
ethUsdPrice: action.data,
};
case ActionTypes.UPDATE_SELECTED_ASSET_AMOUNT:
return {
...state,
selectedAssetAmount: action.data,
};
case ActionTypes.UPDATE_LATEST_BUY_QUOTE:
const newBuyQuoteIfExists = action.data;
const shouldUpdate =
_.isUndefined(newBuyQuoteIfExists) || doesBuyQuoteMatchState(newBuyQuoteIfExists, state);
if (shouldUpdate) {
return {
...state,
latestBuyQuote: newBuyQuoteIfExists,
quoteRequestState: AsyncProcessState.SUCCESS,
};
} else {
return state;
}
case ActionTypes.SET_QUOTE_REQUEST_STATE_PENDING:
return {
...state,
latestBuyQuote: undefined,
quoteRequestState: AsyncProcessState.PENDING,
};
case ActionTypes.SET_QUOTE_REQUEST_STATE_FAILURE:
return {
...state,
latestBuyQuote: undefined,
quoteRequestState: AsyncProcessState.FAILURE,
};
case ActionTypes.UPDATE_BUY_ORDER_STATE:
return {
...state,
buyOrderState: action.data,
};
case ActionTypes.SET_ERROR_MESSAGE:
return {
...state,
latestErrorMessage: action.data,
latestErrorDisplayStatus: DisplayStatus.Present,
};
case ActionTypes.HIDE_ERROR:
return {
...state,
latestErrorDisplayStatus: DisplayStatus.Hidden,
};
case ActionTypes.CLEAR_ERROR:
return {
...state,
latestErrorMessage: undefined,
latestErrorDisplayStatus: DisplayStatus.Hidden,
};
case ActionTypes.UPDATE_SELECTED_ASSET:
return {
...state,
selectedAsset: action.data,
};
case ActionTypes.RESET_AMOUNT:
return {
...state,
latestBuyQuote: undefined,
quoteRequestState: AsyncProcessState.NONE,
buyOrderState: { processState: OrderProcessState.NONE },
selectedAssetAmount: undefined,
};
case ActionTypes.SET_AVAILABLE_ASSETS:
return {
...state,
availableAssets: action.data,
};
default:
return state;
}
};
const doesBuyQuoteMatchState = (buyQuote: BuyQuote, state: State): boolean => {
const selectedAssetIfExists = state.selectedAsset;
const selectedAssetAmountIfExists = state.selectedAssetAmount;
// if no selectedAsset or selectedAssetAmount exists on the current state, return false
if (_.isUndefined(selectedAssetIfExists) || _.isUndefined(selectedAssetAmountIfExists)) {
return false;
}
// if buyQuote's assetData does not match that of the current selected asset, return false
if (selectedAssetIfExists.assetData !== buyQuote.assetData) {
return false;
}
// if ERC20 and buyQuote's assetBuyAmount does not match selectedAssetAmount, return false
// if ERC721, return true
const selectedAssetMetaData = selectedAssetIfExists.metaData;
if (selectedAssetMetaData.assetProxyId === AssetProxyId.ERC20) {
const selectedAssetAmountBaseUnits = Web3Wrapper.toBaseUnitAmount(
selectedAssetAmountIfExists,
selectedAssetMetaData.decimals,
);
const doesAssetAmountMatch = selectedAssetAmountBaseUnits.eq(buyQuote.assetBuyAmount);
return doesAssetAmountMatch;
} else {
return true;
}
};
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