1 files changed, 215 insertions, 0 deletions
diff --git a/packages/website/ts/utils/utils.ts b/packages/website/ts/utils/utils.ts
new file mode 100644
index 000000000..eb4c5be3a
--- /dev/null
+++ b/packages/website/ts/utils/utils.ts
@@ -0,0 +1,215 @@
+import * as _ from 'lodash';
+import {
+    SideToAssetToken,
+    SignatureData,
+    Order,
+    Side,
+    TokenByAddress,
+    OrderParty,
+    ScreenWidths,
+    EtherscanLinkSuffixes,
+    Token,
+    Networks,
+} from 'ts/types';
+import * as moment from 'moment';
+import isMobile = require('is-mobile');
+import * as u2f from 'ts/vendor/u2f_api';
+import deepEqual = require('deep-equal');
+import ethUtil = require('ethereumjs-util');
+import BigNumber from 'bignumber.js';
+import {constants} from 'ts/utils/constants';
+
+const LG_MIN_EM = 64;
+const MD_MIN_EM = 52;
+
+export const utils = {
+    assert(condition: boolean, message: string) {
+        if (!condition) {
+            throw new Error(message);
+        }
+    },
+    spawnSwitchErr(name: string, value: any) {
+        return new Error(`Unexpected switch value: ${value} encountered for ${name}`);
+    },
+    isNumeric(n: string) {
+        return !isNaN(parseFloat(n)) && isFinite(Number(n));
+    },
+    // This default unix timestamp is used for orders where the user does not specify an expiry date.
+    // It is a fixed constant so that both the redux store's INITIAL_STATE and components can check for
+    // whether a user has set an expiry date or not. It is set unrealistically high so as not to collide
+    // with actual values a user would select.
+    initialOrderExpiryUnixTimestampSec(): BigNumber {
+        const m = moment('2050-01-01');
+        return new BigNumber(m.unix());
+    },
+    convertToUnixTimestampSeconds(date: moment.Moment, time?: moment.Moment): BigNumber {
+        const finalMoment = date;
+        if (!_.isUndefined(time)) {
+            finalMoment.hours(time.hours());
+            finalMoment.minutes(time.minutes());
+        }
+        return new BigNumber(finalMoment.unix());
+    },
+    convertToMomentFromUnixTimestamp(unixTimestampSec: BigNumber): moment.Moment {
+        return moment.unix(unixTimestampSec.toNumber());
+    },
+    convertToReadableDateTimeFromUnixTimestamp(unixTimestampSec: BigNumber): string {
+        const m = this.convertToMomentFromUnixTimestamp(unixTimestampSec);
+        const formattedDate: string = m.format('h:MMa MMMM D YYYY');
+        return formattedDate;
+    },
+    generateOrder(networkId: number, exchangeContract: string, sideToAssetToken: SideToAssetToken,
+                  orderExpiryTimestamp: BigNumber, orderTakerAddress: string, orderMakerAddress: string,
+                  makerFee: BigNumber, takerFee: BigNumber, feeRecipient: string,
+                  signatureData: SignatureData, tokenByAddress: TokenByAddress, orderSalt: BigNumber): Order {
+        const makerToken = tokenByAddress[sideToAssetToken[Side.deposit].address];
+        const takerToken = tokenByAddress[sideToAssetToken[Side.receive].address];
+        const order = {
+            maker: {
+                address: orderMakerAddress,
+                token: {
+                    name: makerToken.name,
+                    symbol: makerToken.symbol,
+                    decimals: makerToken.decimals,
+                    address: makerToken.address,
+                },
+                amount: sideToAssetToken[Side.deposit].amount.toString(),
+                feeAmount: makerFee.toString(),
+            },
+            taker: {
+                address: orderTakerAddress,
+                token: {
+                    name: takerToken.name,
+                    symbol: takerToken.symbol,
+                    decimals: takerToken.decimals,
+                    address: takerToken.address,
+                },
+                amount: sideToAssetToken[Side.receive].amount.toString(),
+                feeAmount: takerFee.toString(),
+            },
+            expiration: orderExpiryTimestamp.toString(),
+            feeRecipient,
+            salt: orderSalt.toString(),
+            signature: signatureData,
+            exchangeContract,
+            networkId,
+        };
+        return order;
+    },
+    consoleLog(message: string) {
+        /* tslint:disable */
+        console.log(message);
+        /* tslint:enable */
+    },
+    sleepAsync(ms: number) {
+        return new Promise(resolve => setTimeout(resolve, ms));
+    },
+    deepEqual(actual: any, expected: any, opts?: {strict: boolean}) {
+        return deepEqual(actual, expected, opts);
+    },
+    getColSize(items: number) {
+        const bassCssGridSize = 12; // Source: http://basscss.com/#basscss-grid
+        const colSize = 12 / items;
+        if (!_.isInteger(colSize)) {
+            throw new Error('Number of cols must be divisible by 12');
+        }
+        return colSize;
+    },
+    getScreenWidth() {
+        const documentEl = document.documentElement;
+        const body = document.getElementsByTagName('body')[0];
+        const widthInPx = window.innerWidth || documentEl.clientWidth || body.clientWidth;
+        const bodyStyles: any = window.getComputedStyle(document.querySelector('body'));
+        const widthInEm = widthInPx / parseFloat(bodyStyles['font-size']);
+
+        // This logic mirrors the CSS media queries in BassCSS for the `lg-`, `md-` and `sm-` CSS
+        // class prefixes. Do not edit these.
+        if (widthInEm > LG_MIN_EM) {
+            return ScreenWidths.LG;
+        } else if (widthInEm > MD_MIN_EM) {
+            return ScreenWidths.MD;
+        } else {
+            return ScreenWidths.SM;
+        }
+    },
+    isUserOnMobile(): boolean {
+        const isUserOnMobile = isMobile();
+        return isUserOnMobile;
+    },
+    getEtherScanLinkIfExists(addressOrTxHash: string, networkId: number, suffix: EtherscanLinkSuffixes): string {
+        const networkName = constants.networkNameById[networkId];
+        if (_.isUndefined(networkName)) {
+            return undefined;
+        }
+        const etherScanPrefix = networkName === Networks.mainnet ? '' : `${networkName.toLowerCase()}.`;
+        return `https://${etherScanPrefix}etherscan.io/${suffix}/${addressOrTxHash}`;
+    },
+    setUrlHash(anchorId: string) {
+        window.location.hash = anchorId;
+    },
+    async isU2FSupportedAsync(): Promise<boolean> {
+        const w = (window as any);
+        return new Promise((resolve: (isSupported: boolean) => void) => {
+            if (w.u2f && !w.u2f.getApiVersion) {
+                // u2f object was found (Firefox with extension)
+                resolve(true);
+            } else {
+                // u2f object was not found. Using Google polyfill
+                // HACK: u2f.getApiVersion will simply not return a version if the
+                // U2F call fails for any reason. Because of this, we set a hard 3sec
+                // timeout to the request on our end.
+                const getApiVersionTimeoutMs = 3000;
+                const intervalId = setTimeout(() => {
+                    resolve(false);
+                }, getApiVersionTimeoutMs);
+                u2f.getApiVersion((version: number) => {
+                    clearTimeout(intervalId);
+                    resolve(true);
+                });
+            }
+        });
+    },
+    // This checks the error message returned from an injected Web3 instance on the page
+    // after a user was prompted to sign a message or send a transaction and decided to
+    // reject the request.
+    didUserDenyWeb3Request(errMsg: string) {
+        const metamaskDenialErrMsg = 'User denied message';
+        const paritySignerDenialErrMsg = 'Request has been rejected';
+        const ledgerDenialErrMsg = 'Invalid status 6985';
+        const isUserDeniedErrMsg = _.includes(errMsg, metamaskDenialErrMsg) ||
+                                   _.includes(errMsg, paritySignerDenialErrMsg) ||
+                                   _.includes(errMsg, ledgerDenialErrMsg);
+        return isUserDeniedErrMsg;
+    },
+    getCurrentEnvironment() {
+        switch (location.host) {
+            case constants.DEVELOPMENT_DOMAIN:
+                return 'development';
+            case constants.STAGING_DOMAIN:
+                return 'staging';
+            case constants.PRODUCTION_DOMAIN:
+                return 'production';
+            default:
+                return 'production';
+        }
+    },
+    getIdFromName(name: string) {
+        const id = name.replace(/ /g, '-');
+        return id;
+    },
+    getAddressBeginAndEnd(address: string): string {
+        const truncatedAddress = `${address.substring(0, 6)}...${address.substr(-4)}`; // 0x3d5a...b287
+        return truncatedAddress;
+    },
+    hasUniqueNameAndSymbol(tokens: Token[], token: Token) {
+        if (token.isRegistered) {
+            return true; // Since it's registered, it is the canonical token
+        }
+        const registeredTokens = _.filter(tokens, t => t.isRegistered);
+        const tokenWithSameNameIfExists = _.find(registeredTokens, {name: token.name});
+        const isUniqueName = _.isUndefined(tokenWithSameNameIfExists);
+        const tokenWithSameSymbolIfExists = _.find(registeredTokens, {name: token.symbol});
+        const isUniqueSymbol = _.isUndefined(tokenWithSameSymbolIfExists);
+        return isUniqueName && isUniqueSymbol;
+    },
+};