From 7e90245dba84647fd40404cfef28d339408010df Mon Sep 17 00:00:00 2001
From: Andrew Watkins <watts@influxdb.com>
Date: Wed, 28 Feb 2018 14:05:24 -0700
Subject: [PATCH] Refactor Dropdown component and specs

---
 ui/src/shared/components/Dropdown.js       | 187 ++++++---------------
 ui/src/shared/components/DropdownHead.js   |  35 ++++
 ui/src/shared/components/DropdownInput.js  |  42 +++++
 ui/src/shared/components/DropdownMenu.js   | 156 +++++++++++++++++
 ui/test/shared/components/Dropdown.test.js |  39 ++---
 5 files changed, 304 insertions(+), 155 deletions(-)
 create mode 100644 ui/src/shared/components/DropdownHead.js
 create mode 100644 ui/src/shared/components/DropdownInput.js
 create mode 100644 ui/src/shared/components/DropdownMenu.js

diff --git a/ui/src/shared/components/Dropdown.js b/ui/src/shared/components/Dropdown.js
index ec400d823..a99b6b4e0 100644
--- a/ui/src/shared/components/Dropdown.js
+++ b/ui/src/shared/components/Dropdown.js
@@ -1,10 +1,10 @@
 import React, {Component} from 'react'
 import PropTypes from 'prop-types'
-import {Link} from 'react-router'
 import classnames from 'classnames'
 import OnClickOutside from 'shared/components/OnClickOutside'
-import FancyScrollbar from 'shared/components/FancyScrollbar'
-import {DROPDOWN_MENU_MAX_HEIGHT} from 'shared/constants/index'
+import DropdownMenu, {DropdownMenuEmpty} from 'shared/components/DropdownMenu'
+import DropdownInput from 'shared/components/DropdownInput'
+import DropdownHead from 'shared/components/DropdownHead'
 
 export class Dropdown extends Component {
   constructor(props) {
@@ -123,111 +123,33 @@ export class Dropdown extends Component {
     })
   }
 
-  renderMenu() {
-    const {
-      actions,
-      addNew,
-      items,
-      menuWidth,
-      menuLabel,
-      menuClass,
-      useAutoComplete,
-      selected,
-    } = this.props
-    const {filteredItems, highlightedItemIndex} = this.state
-    const menuItems = useAutoComplete ? filteredItems : items
-
-    return (
-      <ul
-        className={classnames('dropdown-menu', {
-          'dropdown-menu--no-highlight': useAutoComplete,
-          [menuClass]: menuClass,
-        })}
-        style={{width: menuWidth}}
-        data-test="dropdown-ul"
-      >
-        <FancyScrollbar
-          autoHide={false}
-          autoHeight={true}
-          maxHeight={DROPDOWN_MENU_MAX_HEIGHT}
-          data-test="scrollbar"
-        >
-          {menuLabel
-            ? <li className="dropdown-header">
-                {menuLabel}
-              </li>
-            : null}
-          {menuItems.map((item, i) => {
-            if (item.text === 'SEPARATOR') {
-              return <li key={i} className="dropdown-divider" />
-            }
-            return (
-              <li
-                className={classnames('dropdown-item', {
-                  highlight: i === highlightedItemIndex,
-                  active: item.text === selected,
-                })}
-                data-test="dropdown-item"
-                key={i}
-              >
-                <a
-                  href="#"
-                  onClick={this.handleSelection(item)}
-                  onMouseOver={this.handleHighlight(i)}
-                >
-                  {item.text}
-                </a>
-                {actions && actions.length
-                  ? <div className="dropdown-actions">
-                      {actions.map(action => {
-                        return (
-                          <button
-                            key={action.text}
-                            className="dropdown-action"
-                            onClick={this.handleAction(action, item)}
-                          >
-                            <span
-                              title={action.text}
-                              className={`icon ${action.icon}`}
-                            />
-                          </button>
-                        )
-                      })}
-                    </div>
-                  : null}
-              </li>
-            )
-          })}
-          {addNew
-            ? <li className="multi-select--apply">
-                <Link className="btn btn-xs btn-default" to={addNew.url}>
-                  {addNew.text}
-                </Link>
-              </li>
-            : null}
-        </FancyScrollbar>
-      </ul>
-    )
-  }
-
   render() {
     const {
       items,
+      addNew,
+      actions,
       selected,
+      disabled,
+      iconName,
       className,
       menuClass,
-      iconName,
+      menuWidth,
+      menuLabel,
       buttonSize,
       buttonColor,
       toggleStyle,
       useAutoComplete,
+<<<<<<< HEAD
       disabled,
       tabIndex,
+=======
+>>>>>>> Refactor Dropdown component and specs
     } = this.props
-    const {isOpen, searchTerm, filteredItems} = this.state
-    const menuItems = useAutoComplete ? filteredItems : items
 
+    const {isOpen, searchTerm, filteredItems, highlightedItemIndex} = this.state
+    const menuItems = useAutoComplete ? filteredItems : items
     const disabledClass = disabled ? 'disabled' : null
+
     return (
       <div
         onClick={this.handleClick}
@@ -237,49 +159,46 @@ export class Dropdown extends Component {
         })}
         tabIndex={tabIndex}
         ref={r => (this.dropdownRef = r)}
-        data-test="dropdown-button"
+        data-test="dropdown-toggle"
       >
         {useAutoComplete && isOpen
-          ? <div
-              className={`dropdown-autocomplete dropdown-toggle ${buttonSize} ${buttonColor} ${disabledClass}`}
-              style={toggleStyle}
-            >
-              <input
-                ref="dropdownAutoComplete"
-                className="dropdown-autocomplete--input"
-                type="text"
-                autoFocus={true}
-                placeholder="Filter items..."
-                spellCheck={false}
-                onChange={this.handleFilterChange}
-                onKeyDown={this.handleFilterKeyPress}
-                value={searchTerm}
-              />
-              <span className="caret" />
-            </div>
-          : <div
-              className={`btn dropdown-toggle ${buttonSize} ${buttonColor} ${disabledClass}`}
-              style={toggleStyle}
-            >
-              {iconName
-                ? <span className={classnames('icon', {[iconName]: true})} />
-                : null}
-              <span className="dropdown-selected">
-                {selected}
-              </span>
-              <span className="caret" />
-            </div>}
-        {isOpen && menuItems.length ? this.renderMenu() : null}
-        {isOpen && !menuItems.length
-          ? <ul
-              className={classnames('dropdown-menu', {
-                'dropdown-menu--no-highlight': useAutoComplete,
-                [menuClass]: menuClass,
-              })}
-            >
-              <li className="dropdown-empty">No matching items</li>
-            </ul>
-          : null}
+          ? <DropdownInput
+              searchTerm={searchTerm}
+              buttonSize={buttonSize}
+              buttonColor={buttonColor}
+              toggleStyle={toggleStyle}
+              disabledClass={disabledClass}
+              onFilterChange={this.handleFilterChange}
+              onFilterKeyPress={this.handleFilterKeyPress}
+            />
+          : <DropdownHead
+              iconName={iconName}
+              selected={selected}
+              searchTerm={searchTerm}
+              buttonSize={buttonSize}
+              buttonColor={buttonColor}
+              toggleStyle={toggleStyle}
+              disabledClass={disabledClass}
+            />}
+        {isOpen && menuItems.length
+          ? <DropdownMenu
+              addNew={addNew}
+              actions={actions}
+              items={menuItems}
+              selected={selected}
+              menuClass={menuClass}
+              menuWidth={menuWidth}
+              menuLabel={menuLabel}
+              onAction={this.handleAction}
+              useAutoComplete={useAutoComplete}
+              onSelection={this.handleSelection}
+              onHighlight={this.handleHighlight}
+              highlightedItemIndex={highlightedItemIndex}
+            />
+          : <DropdownMenuEmpty
+              useAutoComplete={useAutoComplete}
+              menuClass={menuClass}
+            />}
       </div>
     )
   }
diff --git a/ui/src/shared/components/DropdownHead.js b/ui/src/shared/components/DropdownHead.js
new file mode 100644
index 000000000..a861a1f90
--- /dev/null
+++ b/ui/src/shared/components/DropdownHead.js
@@ -0,0 +1,35 @@
+import React from 'react'
+import PropTypes from 'prop-types'
+import classnames from 'classnames'
+
+const DropdownHead = ({
+  iconName,
+  selected,
+  buttonSize,
+  toggleStyle,
+  buttonColor,
+  disabledClass,
+}) =>
+  <div
+    className={`btn dropdown-toggle ${buttonSize} ${buttonColor} ${disabledClass}`}
+    style={toggleStyle}
+  >
+    {iconName && <span className={classnames('icon', {[iconName]: true})} />}
+    <span className="dropdown-selected">
+      {selected}
+    </span>
+    <span className="caret" />
+  </div>
+
+const {string, shape} = PropTypes
+
+DropdownHead.propTypes = {
+  iconName: string,
+  selected: string,
+  buttonSize: string,
+  toggleStyle: shape(),
+  buttonColor: string,
+  disabledClass: string,
+}
+
+export default DropdownHead
diff --git a/ui/src/shared/components/DropdownInput.js b/ui/src/shared/components/DropdownInput.js
new file mode 100644
index 000000000..dc5050414
--- /dev/null
+++ b/ui/src/shared/components/DropdownInput.js
@@ -0,0 +1,42 @@
+import React from 'react'
+import PropTypes from 'prop-types'
+
+const DropdownInput = ({
+  searchTerm,
+  buttonSize,
+  buttonColor,
+  toggleStyle,
+  disabledClass,
+  onFilterChange,
+  onFilterKeyPress,
+}) =>
+  <div
+    className={`dropdown-autocomplete dropdown-toggle ${buttonSize} ${buttonColor} ${disabledClass}`}
+    style={toggleStyle}
+  >
+    <input
+      className="dropdown-autocomplete--input"
+      type="text"
+      autoFocus={true}
+      placeholder="Filter items..."
+      spellCheck={false}
+      onChange={onFilterChange}
+      onKeyDown={onFilterKeyPress}
+      value={searchTerm}
+    />
+    <span className="caret" />
+  </div>
+
+export default DropdownInput
+
+const {func, shape, string} = PropTypes
+
+DropdownInput.propTypes = {
+  searchTerm: string,
+  buttonSize: string,
+  buttonColor: string,
+  toggleStyle: shape({}),
+  disabledClass: string,
+  onFilterChange: func,
+  onFilterKeyPress: func,
+}
diff --git a/ui/src/shared/components/DropdownMenu.js b/ui/src/shared/components/DropdownMenu.js
new file mode 100644
index 000000000..2bb0b3205
--- /dev/null
+++ b/ui/src/shared/components/DropdownMenu.js
@@ -0,0 +1,156 @@
+import React from 'react'
+import PropTypes from 'prop-types'
+import {Link} from 'react-router'
+
+import classnames from 'classnames'
+import {DROPDOWN_MENU_MAX_HEIGHT} from 'shared/constants/index'
+import FancyScrollbar from 'shared/components/FancyScrollbar'
+
+// AddNewResource is an optional parameter that takes the user to another
+// route defined by url prop
+const AddNewButton = ({url, text}) =>
+  <li className="multi-select--apply">
+    <Link className="btn btn-xs btn-default" to={url}>
+      {text}
+    </Link>
+  </li>
+
+const DropdownMenu = ({
+  items,
+  addNew,
+  actions,
+  selected,
+  onAction,
+  menuClass,
+  menuWidth,
+  menuLabel,
+  onSelection,
+  onHighlight,
+  useAutoComplete,
+  highlightedItemIndex,
+}) => {
+  return (
+    <ul
+      className={classnames('dropdown-menu', {
+        'dropdown-menu--no-highlight': useAutoComplete,
+        [menuClass]: menuClass,
+      })}
+      style={{width: menuWidth}}
+      data-test="dropdown-ul"
+    >
+      <FancyScrollbar
+        autoHide={false}
+        autoHeight={true}
+        maxHeight={DROPDOWN_MENU_MAX_HEIGHT}
+        data-test="scrollbar"
+      >
+        {menuLabel
+          ? <li className="dropdown-header">
+              {menuLabel}
+            </li>
+          : null}
+        {items.map((item, i) => {
+          if (item.text === 'SEPARATOR') {
+            return <li key={i} className="dropdown-divider" />
+          }
+
+          return (
+            <li
+              className={classnames('dropdown-item', {
+                highlight: i === highlightedItemIndex,
+                active: item.text === selected,
+              })}
+              data-test="dropdown-item"
+              key={i}
+            >
+              <a
+                href="#"
+                onClick={onSelection(item)}
+                onMouseOver={onHighlight(i)}
+              >
+                {item.text}
+              </a>
+              {actions && actions.length
+                ? <div className="dropdown-actions">
+                    {actions.map(action => {
+                      return (
+                        <button
+                          key={action.text}
+                          className="dropdown-action"
+                          onClick={onAction(action, item)}
+                        >
+                          <span
+                            title={action.text}
+                            className={`icon ${action.icon}`}
+                          />
+                        </button>
+                      )
+                    })}
+                  </div>
+                : null}
+            </li>
+          )
+        })}
+        {addNew && <AddNewButton url={addNew.url} text={addNew.text} />}
+      </FancyScrollbar>
+    </ul>
+  )
+}
+
+export const DropdownMenuEmpty = ({useAutoComplete, menuClass}) =>
+  <ul
+    className={classnames('dropdown-menu', {
+      'dropdown-menu--no-highlight': useAutoComplete,
+      [menuClass]: menuClass,
+    })}
+  >
+    <li className="dropdown-empty">No matching items</li>
+  </ul>
+
+const {arrayOf, bool, number, shape, string, func} = PropTypes
+
+AddNewButton.propTypes = {
+  url: string,
+  text: string,
+}
+
+DropdownMenuEmpty.propTypes = {
+  useAutoComplete: bool,
+  menuClass: string,
+}
+
+DropdownMenu.propTypes = {
+  onAction: func,
+  actions: arrayOf(
+    shape({
+      icon: string.isRequired,
+      text: string.isRequired,
+      handler: func.isRequired,
+    })
+  ),
+  items: arrayOf(
+    shape({
+      text: string.isRequired,
+    })
+  ).isRequired,
+  onClick: func,
+  addNew: shape({
+    url: string.isRequired,
+    text: string.isRequired,
+  }),
+  selected: string.isRequired,
+  iconName: string,
+  className: string,
+  buttonColor: string,
+  menuWidth: string,
+  menuLabel: string,
+  menuClass: string,
+  useAutoComplete: bool,
+  disabled: bool,
+  searchTerm: string,
+  onSelection: func,
+  onHighlight: func,
+  highlightedItemIndex: number,
+}
+
+export default DropdownMenu
diff --git a/ui/test/shared/components/Dropdown.test.js b/ui/test/shared/components/Dropdown.test.js
index 8b0388a6e..845f6a9e3 100644
--- a/ui/test/shared/components/Dropdown.test.js
+++ b/ui/test/shared/components/Dropdown.test.js
@@ -1,6 +1,9 @@
 import React from 'react'
-import Dropdown from 'shared/components/dropdown'
+import Dropdown from 'shared/components/Dropdown'
+import DropdownMenu from 'shared/components/DropdownMenu'
+
 import {shallow} from 'enzyme'
+const items = [{text: 'foo'}, {text: 'bar'}]
 
 const setup = (override = {}) => {
   const props = {
@@ -10,10 +13,12 @@ const setup = (override = {}) => {
     ...override,
   }
 
-  const wrapper = shallow(<Dropdown {...props} />)
+  const dropdown = shallow(<Dropdown {...props} />).dive({
+    'data-test': 'dropdown-button',
+  })
 
   return {
-    wrapper,
+    dropdown,
     props,
   }
 }
@@ -21,36 +26,28 @@ const setup = (override = {}) => {
 describe('Components.Shared.Dropdown', () => {
   describe('rednering', () => {
     describe('initial render', () => {
-      it('renders the dropdown button', () => {
-        const {wrapper} = setup()
+      it('renders the dropdown menu button', () => {
+        const {dropdown} = setup()
 
-        const actual = wrapper.dive({'data-test': 'dropdown-button'})
-        expect(actual.length).toBe(1)
+        expect(dropdown.exists()).toBe(true)
       })
 
       it('does not show the list', () => {
-        const items = [{text: 'foo'}, {text: 'bar'}]
-        const {wrapper} = setup({items})
+        const {dropdown} = setup({items})
 
-        const dropdown = wrapper.dive({'data-test': 'dropdown-button'})
-        const list = dropdown.find({'data-test': 'dropdown-items'})
-        expect(list.length).toBe(0)
+        const menu = dropdown.find(DropdownMenu)
+        expect(menu.exists()).toBe(false)
       })
     })
 
     describe('user interactions', () => {
-      it('shows the list when clicked', () => {
-        const items = [{text: 'foo'}, {text: 'bar'}]
-        const {wrapper} = setup({items})
+      it('shows the menu when clicked', () => {
+        const {dropdown} = setup({items})
 
-        const dropdown = wrapper.dive({'data-test': 'dropdown-button'})
         dropdown.simulate('click')
 
-        const ul = dropdown.find({'data-test': 'dropdown-ul'})
-        expect(ul.length).toBe(1)
-
-        const list = ul.find({'data-test': 'dropdown-item'})
-        expect(list.length).toBe(items.length)
+        const menu = dropdown.find(DropdownMenu)
+        expect(menu.exists()).toBe(true)
       })
     })
   })