Move checkExistingAddresses to helpers/utils/util and stop its use of ramda (#8868)

ui/app/helpers/utils/util.js

@@ -333,3 +333,23 @@ export function isExtensionUrl (urlLike) {
   }
   return false
 }
+
+/**
+ * Checks whether an address is in a passed list of objects with address properties. The check is performed on the
+ * lowercased version of the addresses.
+ *
+ * @param {string} address - The hex address to check
+ * @param {array} list - The array of objects to check
+ * @returns {boolean} Whether or not the address is in the list
+ */
+export function checkExistingAddresses (address, list = []) {
+  if (!address) {
+    return false
+  }
+
+  const matchesAddress = (obj) => {
+    return obj.address.toLowerCase() === address.toLowerCase()
+  }
+
+  return list.some(matchesAddress)
+}

ui/app/helpers/utils/util.test.js

@@ -319,4 +319,33 @@ describe('util', function () {
       })
     })
   })
+
+  describe('checkExistingAddresses', function () {
+    const tokenList = [
+      { address: 'A' },
+      { address: 'n' },
+      { address: 'Q' },
+      { address: 'z' },
+    ]
+
+    it('should return true when a lowercase address matches an uppercase address in the passed list', function () {
+      assert(util.checkExistingAddresses('q', tokenList) === true)
+    })
+
+    it('should return true when an uppercase address matches a lowercase address in the passed list', function () {
+      assert(util.checkExistingAddresses('N', tokenList) === true)
+    })
+
+    it('should return true when a lowercase address matches a lowercase address in the passed list', function () {
+      assert(util.checkExistingAddresses('z', tokenList) === true)
+    })
+
+    it('should return true when an uppercase address matches an uppercase address in the passed list', function () {
+      assert(util.checkExistingAddresses('Q', tokenList) === true)
+    })
+
+    it('should return false when the passed address is not in the passed list', function () {
+      assert(util.checkExistingAddresses('b', tokenList) === false)
+    })
+  })
 })

ui/app/pages/add-token/add-token.component.js

@@ -1,7 +1,7 @@
 import React, { Component } from 'react'
 import PropTypes from 'prop-types'
 import ethUtil from 'ethereumjs-util'
-import { checkExistingAddresses } from './util'
+import { checkExistingAddresses } from '../../helpers/utils/util'
 import { tokenInfoGetter } from '../../helpers/utils/token-util'
 import { CONFIRM_ADD_TOKEN_ROUTE } from '../../helpers/constants/routes'
 import TextField from '../../components/ui/text-field'

ui/app/pages/add-token/token-list/token-list.component.js

@@ -1,7 +1,7 @@
 import React, { Component } from 'react'
 import PropTypes from 'prop-types'
 import classnames from 'classnames'
-import { checkExistingAddresses } from '../util'
+import { checkExistingAddresses } from '../../../helpers/utils/util'
 import TokenListPlaceholder from './token-list-placeholder'
 
 export default class InfoBox extends Component {

ui/app/pages/add-token/util.js

@@ -1,13 +0,0 @@
-import R from 'ramda'
-
-export function checkExistingAddresses (address, tokenList = []) {
-  if (!address) {
-    return false
-  }
-
-  const matchesAddress = (existingToken) => {
-    return existingToken.address.toLowerCase() === address.toLowerCase()
-  }
-
-  return R.any(matchesAddress)(tokenList)
-}

ui/app/pages/send/send-content/add-recipient/add-recipient.js

@@ -5,9 +5,7 @@ import {
   INVALID_RECIPIENT_ADDRESS_NOT_ETH_NETWORK_ERROR,
 } from '../../send.constants'
 
-import { isValidAddress, isEthNetwork } from '../../../../helpers/utils/util'
+import { isValidAddress, isEthNetwork, checkExistingAddresses } from '../../../../helpers/utils/util'
-import { checkExistingAddresses } from '../../../add-token/util'
-
 import ethUtil from 'ethereumjs-util'
 import contractMap from 'eth-contract-metadata'