From 563eb2322b3c2ff84b4c7b536ee3980e79286947 Mon Sep 17 00:00:00 2001
From: Patrick Browne <pt.browne@gmail.com>
Date: Wed, 20 Nov 2019 17:04:11 +0100
Subject: [PATCH] feat: Implement DateMonthPicker

---
 docs/styleguide.config.js            |   3 +-
 react/DateMonthPicker/Readme.md      |  32 ++++++++
 react/DateMonthPicker/index.jsx      | 111 +++++++++++++++++++++++++++
 react/DateMonthPicker/index.spec.jsx |  67 ++++++++++++++++
 react/DateMonthPicker/styles.styl    |  37 +++++++++
 5 files changed, 249 insertions(+), 1 deletion(-)
 create mode 100644 react/DateMonthPicker/Readme.md
 create mode 100644 react/DateMonthPicker/index.jsx
 create mode 100644 react/DateMonthPicker/index.spec.jsx
 create mode 100644 react/DateMonthPicker/styles.styl

diff --git a/docs/styleguide.config.js b/docs/styleguide.config.js
index adec6f2e05..e8dbc2728a 100644
--- a/docs/styleguide.config.js
+++ b/docs/styleguide.config.js
@@ -40,7 +40,8 @@ module.exports = {
         '../react/SelectBox/SelectBox.jsx',
         '../react/Textarea/index.jsx',
         '../react/Toggle/index.jsx',
-        '../react/FileInput/index.jsx'
+        '../react/FileInput/index.jsx',
+        '../react/DateMonthPicker/index.jsx'
       ]
     },
     {
diff --git a/react/DateMonthPicker/Readme.md b/react/DateMonthPicker/Readme.md
new file mode 100644
index 0000000000..46f6c70b48
--- /dev/null
+++ b/react/DateMonthPicker/Readme.md
@@ -0,0 +1,32 @@
+```
+import I18n from 'cozy-ui/transpiled/react/I18n';
+import DateMonthPicker from 'cozy-ui/transpiled/react/DateMonthPicker';
+import Stack from 'cozy-ui/transpiled/react/Stack';
+import Button from 'cozy-ui/transpiled/react/Button';
+import Modal from 'cozy-ui/transpiled/react/Modal';
+
+
+const dictRequire = x => ({})
+const initialState = { choosing: isTesting(), monthDate: '2019-08' }
+const showPicker = () => setState({ choosing: true });
+const hidePicker = () => setState({ choosing: false });
+const handleSelect = monthDate => {
+  setState({ monthDate })
+  hidePicker()
+}
+
+<I18n dictRequire={dictRequire} lang='en'>
+  <Stack>
+      Month chosen: { state.monthDate ? state.monthDate : 'No date chosen yet'}<br/>
+      <Button onClick={showPicker} label='Choose month'/>
+      { state.choosing ? <Modal dismissAction={hidePicker}>
+        <DateMonthPicker
+            f={x => x}
+            onSelect={handleSelect}
+            initialValue={state.monthDate}
+          />
+        <div className='u-mb-2'>{' '}</div>
+      </Modal>: null }
+  </Stack>
+</I18n>
+```
diff --git a/react/DateMonthPicker/index.jsx b/react/DateMonthPicker/index.jsx
new file mode 100644
index 0000000000..8b7b8f3e5a
--- /dev/null
+++ b/react/DateMonthPicker/index.jsx
@@ -0,0 +1,111 @@
+import React, { useState } from 'react'
+import PropTypes from 'prop-types'
+import Button from '../Button'
+import Icon from '../Icon'
+import { translate } from '../I18n'
+import range from 'lodash/range'
+import { format } from 'date-fns'
+import styles from './styles.styl'
+import cx from 'classnames'
+
+const MonthButton = translate()(({ monthNum, f, onClick, isSelected }) => {
+  const d = new Date(2019, monthNum, 15)
+  const handleClick = () => {
+    onClick(monthNum)
+  }
+  return (
+    <Button
+      theme="secondary"
+      className={cx(
+        styles.DateMonthPicker__MonthButton,
+        isSelected ? styles.ValueSelected : null
+      )}
+      onClick={handleClick}
+      label={f(d, 'MMM')}
+    />
+  )
+})
+
+const useCounter = (initialValue, min, max) => {
+  const [state, setState] = useState(initialValue)
+  const increment = () => setState(Math.min(state + 1, max))
+  const decrement = () => setState(Math.max(state - 1, min))
+  return [state, decrement, increment]
+}
+
+const DateMonthPicker = ({ initialValue, onSelect }) => {
+  const [initialYear, initialMonth] = initialValue
+    .split('-')
+    .map(x => parseInt(x, 10))
+  const [year, decreaseYear, increaseYear] = useCounter(
+    parseInt(initialYear, 10),
+    1990,
+    Infinity
+  )
+
+  const handleClickMonth = month => {
+    const d = new Date(year, month, 1)
+    onSelect(format(d, 'YYYY-MM-DD'))
+  }
+
+  return (
+    <>
+      <div className={styles.DateMonthPicker__YearControls}>
+        <Button
+          className={styles.DateMonthPicker__YearButton}
+          theme="secondary"
+          size="small"
+          label=""
+          onClick={decreaseYear}
+          icon={<Icon icon="left" />}
+        />
+        <div
+          className={cx(
+            styles.DateMonthPicker__Year,
+            year === initialYear && styles.ValueSelected
+          )}
+        >
+          {year}
+        </div>
+        <Button
+          className={styles.DateMonthPicker__YearButton}
+          theme="secondary"
+          size="small"
+          label=""
+          onClick={increaseYear}
+          icon={<Icon icon="right" />}
+        />
+      </div>
+      <div className={styles.DateMonthPicker__MonthGrid}>
+        {range(0, 12).map(i => (
+          <MonthButton
+            key={i}
+            isSelected={initialMonth - 1 === i && year == initialYear}
+            monthNum={i}
+            onClick={handleClickMonth}
+          />
+        ))}
+      </div>
+    </>
+  )
+}
+
+const dateMonthProp = function(props, propName, componentName) {
+  if (!/^[0-9]{4}-[0-9]{2}$/.test(props[propName])) {
+    return new Error(
+      'Invalid prop `' +
+        propName +
+        '` supplied to' +
+        ' `' +
+        componentName +
+        '`. Should be in the form YYYY-MM.'
+    )
+  }
+}
+
+DateMonthPicker.propTypes = {
+  onSelect: PropTypes.func.isRequired,
+  initialValue: dateMonthProp
+}
+
+export default DateMonthPicker
diff --git a/react/DateMonthPicker/index.spec.jsx b/react/DateMonthPicker/index.spec.jsx
new file mode 100644
index 0000000000..08d1ac2ecf
--- /dev/null
+++ b/react/DateMonthPicker/index.spec.jsx
@@ -0,0 +1,67 @@
+import { mount } from 'enzyme'
+import React from 'react'
+import DateMonthPicker from './index'
+import Button from '../Button'
+import I18n from '../I18n'
+import { act } from 'react-dom/test-utils'
+const findButtonWithLabel = (root, label) =>
+  root.findWhere(n => n.type() == Button && n.props().label === label)
+
+const findButtonWithIcon = (root, iconName) =>
+  root.findWhere(n => {
+    const props = n.props()
+    if (n.type() !== Button) {
+      return
+    }
+    if (!props.icon) {
+      return
+    }
+    return props.icon.props.icon === iconName
+  })
+
+describe('DateMonthPicker', () => {
+  const setup = ({ initialValue }) => {
+    const handleSelect = jest.fn()
+    const root = mount(
+      <I18n lang="en" dictRequire={() => {}}>
+        <DateMonthPicker initialValue={initialValue} onSelect={handleSelect} />
+      </I18n>
+    )
+    return { root, handleSelect }
+  }
+
+  it('should be able to select a month', async () => {
+    const { root, handleSelect } = setup({ initialValue: '2015-08' })
+    const februaryButton = findButtonWithLabel(root, 'Feb')
+    expect(februaryButton.length).toBe(1)
+    februaryButton.props().onClick()
+    expect(handleSelect).toHaveBeenCalledTimes(1)
+    expect(handleSelect).toHaveBeenCalledWith('2015-02-01')
+  })
+
+  it('should be able to go to previous year', async () => {
+    const { root, handleSelect } = setup({ initialValue: '2015-08' })
+    const prevYearButton = findButtonWithIcon(root, 'left')
+    act(() => {
+      prevYearButton.props().onClick()
+    })
+    root.update()
+    const februaryButton = findButtonWithLabel(root, 'Feb')
+    februaryButton.props().onClick()
+    expect(handleSelect).toHaveBeenCalledTimes(1)
+    expect(handleSelect).toHaveBeenCalledWith('2014-02-01')
+  })
+
+  it('should be able to go to next year', async () => {
+    const { root, handleSelect } = setup({ initialValue: '2015-08' })
+    const nextYearButton = findButtonWithIcon(root, 'right')
+    act(() => {
+      nextYearButton.props().onClick()
+    })
+    root.update()
+    const februaryButton = findButtonWithLabel(root, 'Feb')
+    februaryButton.props().onClick()
+    expect(handleSelect).toHaveBeenCalledTimes(1)
+    expect(handleSelect).toHaveBeenCalledWith('2016-02-01')
+  })
+})
diff --git a/react/DateMonthPicker/styles.styl b/react/DateMonthPicker/styles.styl
new file mode 100644
index 0000000000..31438594b0
--- /dev/null
+++ b/react/DateMonthPicker/styles.styl
@@ -0,0 +1,37 @@
+.DateMonthPicker__YearControls
+  justify-content center
+  display flex
+  align-items center
+
+.DateMonthPicker__YearButton
+  flex-grow 0
+  min-width 3rem
+  min-height 3rem
+  text-align center
+  border-width 0
+  margin 0
+  color var(--coolGrey)
+  background none !important
+
+.DateMonthPicker__Year
+  display inline-flex
+
+.DateMonthPicker__MonthGrid
+  display grid
+  grid-template-columns repeat(4, auto)
+  grid-template-rows repeat(3, 1fr)
+  overflow hidden
+
+
+.DateMonthPicker__MonthButton
+  min-height 3rem
+  min-width 0
+  margin 0
+  border 0
+  border-radius 0
+  font-weight normal
+  text-transform none
+
+.ValueSelected
+  color var(--primaryColor)
+  font-weight bold