Folder restructure (#6304)

* Remove ui/app/keychains/

* Remove ui/app/img/ (unused images)

* Move conversion-util to helpers/utils/

* Move token-util to helpers/utils/

* Move /helpers/*.js inside /helpers/utils/

* Move util tests inside /helpers/utils/

* Renameand move confirm-transaction/util.js to helpers/utils/

* Move higher-order-components to helpers/higher-order-components/

* Move infura-conversion.json to helpers/constants/

* Move all utility functions to helpers/utils/

* Move pages directory to top-level

* Move all constants to helpers/constants/

* Move metametrics inside helpers/

* Move app and root inside pages/

* Move routes inside helpers/

* Re-organize ducks/

* Move reducers to ducks/

* Move selectors inside selectors/

* Move test out of test folder

* Move action, reducer, store inside store/

* Move ui components inside ui/

* Move UI components inside ui/

* Move connected components inside components/app/

* Move i18n-helper inside helpers/

* Fix unit tests

* Fix unit test

* Move pages components

* Rename routes component

* Move reducers to ducks/index

* Fix bad path in unit test

2 files changed, 87 insertions, 0 deletions

diff --git a/ui/app/pages/add-token/token-search/index.js b/ui/app/pages/add-token/token-search/index.js
new file mode 100644
index 000000000..acaa6b084
--- /dev/null
+++ b/ui/app/pages/add-token/token-search/index.js
@@ -0,0 +1,2 @@
+import TokenSearch from './token-search.component'
+module.exports = TokenSearch
diff --git a/ui/app/pages/add-token/token-search/token-search.component.js b/ui/app/pages/add-token/token-search/token-search.component.js
new file mode 100644
index 000000000..5542a19ff
--- /dev/null
+++ b/ui/app/pages/add-token/token-search/token-search.component.js
@@ -0,0 +1,85 @@
+import React, { Component } from 'react'
+import PropTypes from 'prop-types'
+import contractMap from 'eth-contract-metadata'
+import Fuse from 'fuse.js'
+import InputAdornment from '@material-ui/core/InputAdornment'
+import TextField from '../../../components/ui/text-field'
+
+const contractList = Object.entries(contractMap)
+  .map(([ _, tokenData]) => tokenData)
+  .filter(tokenData => Boolean(tokenData.erc20))
+
+const fuse = new Fuse(contractList, {
+  shouldSort: true,
+  threshold: 0.45,
+  location: 0,
+  distance: 100,
+  maxPatternLength: 32,
+  minMatchCharLength: 1,
+  keys: [
+    { name: 'name', weight: 0.5 },
+    { name: 'symbol', weight: 0.5 },
+  ],
+})
+
+export default class TokenSearch extends Component {
+  static contextTypes = {
+    t: PropTypes.func,
+  }
+
+  static defaultProps = {
+    error: null,
+  }
+
+  static propTypes = {
+    onSearch: PropTypes.func,
+    error: PropTypes.string,
+  }
+
+  constructor (props) {
+    super(props)
+
+    this.state = {
+      searchQuery: '',
+    }
+  }
+
+  handleSearch (searchQuery) {
+    this.setState({ searchQuery })
+    const fuseSearchResult = fuse.search(searchQuery)
+    const addressSearchResult = contractList.filter(token => {
+      return token.address.toLowerCase() === searchQuery.toLowerCase()
+    })
+    const results = [...addressSearchResult, ...fuseSearchResult]
+    this.props.onSearch({ searchQuery, results })
+  }
+
+  renderAdornment () {
+    return (
+      <InputAdornment
+        position="start"
+        style={{ marginRight: '12px' }}
+      >
+        <img src="images/search.svg" />
+      </InputAdornment>
+    )
+  }
+
+  render () {
+    const { error } = this.props
+    const { searchQuery } = this.state
+
+    return (
+      <TextField
+        id="search-tokens"
+        placeholder={this.context.t('searchTokens')}
+        type="text"
+        value={searchQuery}
+        onChange={e => this.handleSearch(e.target.value)}
+        error={error}
+        fullWidth
+        startAdornment={this.renderAdornment()}
+      />
+    )
+  }
+}