stacker.news/components/form.js

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JavaScript
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import Button from 'react-bootstrap/Button'
import InputGroup from 'react-bootstrap/InputGroup'
import BootstrapForm from 'react-bootstrap/Form'
import Alert from 'react-bootstrap/Alert'
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import { Formik, Form as FormikForm, useFormikContext, useField, FieldArray } from 'formik'
import React, { createContext, useContext, useEffect, useRef, useState } from 'react'
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import copy from 'clipboard-copy'
import Thumb from '../svgs/thumb-up-fill.svg'
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import Col from 'react-bootstrap/Col'
import Dropdown from 'react-bootstrap/Dropdown'
import Nav from 'react-bootstrap/Nav'
import Row from 'react-bootstrap/Row'
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import Markdown from '../svgs/markdown-line.svg'
import styles from './form.module.css'
import Text from '../components/text'
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import AddIcon from '../svgs/add-fill.svg'
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import { mdHas } from '../lib/md'
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import CloseIcon from '../svgs/close-line.svg'
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import { useLazyQuery } from '@apollo/client'
import { USER_SEARCH } from '../fragments/users'
import TextareaAutosize from 'react-textarea-autosize'
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export function SubmitButton ({
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children, variant, value, onClick, disabled, ...props
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}) {
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const { isSubmitting, setFieldValue } = useFormikContext()
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return (
<Button
variant={variant || 'main'}
type='submit'
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disabled={disabled || isSubmitting}
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onClick={value
? e => {
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setFieldValue('submit', value)
onClick && onClick(e)
}
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: onClick}
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{...props}
>
{children}
</Button>
)
}
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export function CopyInput (props) {
const [copied, setCopied] = useState(false)
const handleClick = () => {
copy(props.placeholder)
setCopied(true)
setTimeout(() => setCopied(false), 1500)
}
return (
<Input
onClick={handleClick}
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append={
<Button
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className={styles.appendButton}
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size={props.size}
onClick={handleClick}
>
{copied ? <Thumb width={18} height={18} /> : 'copy'}
</Button>
}
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{...props}
/>
)
}
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export function InputSkeleton ({ label, hint }) {
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return (
<BootstrapForm.Group>
{label && <BootstrapForm.Label>{label}</BootstrapForm.Label>}
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<div className='form-control clouds' />
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{hint &&
<BootstrapForm.Text>
{hint}
</BootstrapForm.Text>}
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</BootstrapForm.Group>
)
}
export function MarkdownInput ({ label, topLevel, groupClassName, onChange, setHasImgLink, onKeyDown, innerRef, ...props }) {
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const [tab, setTab] = useState('write')
const [, meta, helpers] = useField(props)
const [selectionRange, setSelectionRange] = useState({ start: 0, end: 0 })
innerRef = innerRef || useRef(null)
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props.as ||= TextareaAutosize
props.rows ||= props.minRows || 6
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useEffect(() => {
!meta.value && setTab('write')
}, [meta.value])
useEffect(() => {
if (selectionRange.start <= selectionRange.end && innerRef?.current) {
const { start, end } = selectionRange
const input = innerRef.current
input.setSelectionRange(start, end)
}
}, [innerRef, selectionRange.start, selectionRange.end])
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return (
<FormGroup label={label} className={groupClassName}>
<div className={`${styles.markdownInput} ${tab === 'write' ? styles.noTopLeftRadius : ''}`}>
<Nav variant='tabs' defaultActiveKey='write' activeKey={tab} onSelect={tab => setTab(tab)}>
<Nav.Item>
<Nav.Link eventKey='write'>write</Nav.Link>
</Nav.Item>
<Nav.Item>
<Nav.Link eventKey='preview' disabled={!meta.value}>preview</Nav.Link>
</Nav.Item>
<a
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className='ms-auto text-muted d-flex align-items-center'
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href='https://guides.github.com/features/mastering-markdown/' target='_blank' rel='noreferrer'
>
<Markdown width={18} height={18} />
</a>
</Nav>
{tab === 'write'
? (
<div>
<InputInner
{...props} onChange={(formik, e) => {
if (onChange) onChange(formik, e)
if (setHasImgLink) {
setHasImgLink(mdHas(e.target.value, ['link', 'image']))
}
}}
innerRef={innerRef}
onKeyDown={(e) => {
const metaOrCtrl = e.metaKey || e.ctrlKey
if (metaOrCtrl) {
if (e.key === 'k') {
// some browsers use CTRL+K to focus search bar so we have to prevent that behavior
e.preventDefault()
insertMarkdownLinkFormatting(innerRef.current, helpers.setValue, setSelectionRange)
}
if (e.key === 'b') {
// some browsers use CTRL+B to open bookmarks so we have to prevent that behavior
e.preventDefault()
insertMarkdownBoldFormatting(innerRef.current, helpers.setValue, setSelectionRange)
}
if (e.key === 'i') {
// some browsers might use CTRL+I to do something else so prevent that behavior too
e.preventDefault()
insertMarkdownItalicFormatting(innerRef.current, helpers.setValue, setSelectionRange)
}
if (e.key === 'Tab' && e.altKey) {
e.preventDefault()
insertMarkdownTabFormatting(innerRef.current, helpers.setValue, setSelectionRange)
}
}
if (onKeyDown) onKeyDown(e)
}}
/>
</div>)
: (
<div className='form-group'>
<div className={`${styles.text} form-control`}>
<Text topLevel={topLevel} noFragments onlyImgProxy={false}>{meta.value}</Text>
</div>
</div>
)}
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</div>
</FormGroup>
)
}
function insertMarkdownFormatting (replaceFn, selectFn) {
return function (input, setValue, setSelectionRange) {
const start = input.selectionStart
const end = input.selectionEnd
const val = input.value
const selectedText = val.substring(start, end)
const mdFormatted = replaceFn(selectedText)
const newVal = val.substring(0, start) + mdFormatted + val.substring(end)
setValue(newVal)
// required for undo, see https://stackoverflow.com/a/27028258
document.execCommand('insertText', false, mdFormatted)
// see https://github.com/facebook/react/issues/6483
// for why we don't use `input.setSelectionRange` directly (hint: event order)
setSelectionRange(selectFn ? selectFn(start, end, mdFormatted) : { start: start + mdFormatted.length, end: start + mdFormatted.length })
}
}
const insertMarkdownTabFormatting = insertMarkdownFormatting(
val => `\t${val}`,
(start, end, mdFormatted) => ({ start: start + 1, end: end + 1 }) // move inside tab
)
const insertMarkdownLinkFormatting = insertMarkdownFormatting(
val => `[${val}](url)`,
(start, end, mdFormatted) => (
start === end
? { start: start + 1, end: end + 1 } // move inside brackets
: { start: start + mdFormatted.length - 4, end: start + mdFormatted.length - 1 }) // move to select url part
)
const insertMarkdownBoldFormatting = insertMarkdownFormatting(
val => `**${val}**`,
(start, end, mdFormatted) => ({ start: start + 2, end: end + 2 }) // move inside bold
)
const insertMarkdownItalicFormatting = insertMarkdownFormatting(
val => `_${val}_`,
(start, end, mdFormatted) => ({ start: start + 1, end: end + 1 }) // move inside italic
)
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function FormGroup ({ className, label, children }) {
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return (
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<BootstrapForm.Group className={`form-group ${className}`}>
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{label && <BootstrapForm.Label>{label}</BootstrapForm.Label>}
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{children}
</BootstrapForm.Group>
)
}
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function InputInner ({
prepend, append, hint, showValid, onChange, overrideValue,
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innerRef, noForm, clear, onKeyDown, ...props
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}) {
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const [field, meta, helpers] = noForm ? [{}, {}, {}] : useField(props)
const formik = noForm ? null : useFormikContext()
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const storageKeyPrefix = useContext(StorageKeyPrefixContext)
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const storageKey = storageKeyPrefix ? storageKeyPrefix + '-' + props.name : undefined
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useEffect(() => {
if (overrideValue) {
helpers.setValue(overrideValue)
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if (storageKey) {
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window.localStorage.setItem(storageKey, overrideValue)
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}
} else if (storageKey) {
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const draft = window.localStorage.getItem(storageKey)
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if (draft) {
// for some reason we have to turn off validation to get formik to
// not assume this is invalid
helpers.setValue(draft, false)
}
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}
}, [overrideValue])
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const invalid = (!formik || formik.submitCount > 0) && meta.touched && meta.error
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return (
<>
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<InputGroup hasValidation>
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{prepend}
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<BootstrapForm.Control
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onKeyDown={(e) => {
const metaOrCtrl = e.metaKey || e.ctrlKey
if (metaOrCtrl) {
if (e.key === 'Enter') formik?.submitForm()
}
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if (onKeyDown) onKeyDown(e)
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}}
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ref={innerRef}
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{...field} {...props}
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onChange={(e) => {
field.onChange(e)
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if (storageKey) {
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window.localStorage.setItem(storageKey, e.target.value)
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}
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if (onChange) {
onChange(formik, e)
}
}}
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isInvalid={invalid}
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isValid={showValid && meta.initialValue !== meta.value && meta.touched && !meta.error}
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/>
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{(clear && field.value) &&
<Button
variant={null}
onClick={(e) => {
helpers.setValue('')
if (storageKey) {
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window.localStorage.removeItem(storageKey)
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}
if (onChange) {
onChange(formik, { target: { value: '' } })
}
}}
className={`${styles.clearButton} ${styles.appendButton} ${invalid ? styles.isInvalid : ''}`}
><CloseIcon className='fill-grey' height={20} width={20} />
</Button>}
{append}
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<BootstrapForm.Control.Feedback type='invalid'>
{meta.touched && meta.error}
</BootstrapForm.Control.Feedback>
</InputGroup>
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{hint && (
<BootstrapForm.Text>
{hint}
</BootstrapForm.Text>
)}
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</>
)
}
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export function InputUserSuggest ({ label, groupClassName, ...props }) {
const [getSuggestions] = useLazyQuery(USER_SEARCH, {
onCompleted: data => {
setSuggestions({ array: data.searchUsers, index: 0 })
}
})
const INITIAL_SUGGESTIONS = { array: [], index: 0 }
const [suggestions, setSuggestions] = useState(INITIAL_SUGGESTIONS)
const [ovalue, setOValue] = useState()
return (
<FormGroup label={label} className={groupClassName}>
<InputInner
{...props}
autoComplete='off'
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onChange={(_, e) => getSuggestions({ variables: { q: e.target.value } })}
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overrideValue={ovalue}
onKeyDown={(e) => {
switch (e.code) {
case 'ArrowUp':
e.preventDefault()
setSuggestions(
{
...suggestions,
index: Math.max(suggestions.index - 1, 0)
})
break
case 'ArrowDown':
e.preventDefault()
setSuggestions(
{
...suggestions,
index: Math.min(suggestions.index + 1, suggestions.array.length - 1)
})
break
case 'Enter':
e.preventDefault()
setOValue(suggestions.array[suggestions.index].name)
setSuggestions(INITIAL_SUGGESTIONS)
break
case 'Escape':
e.preventDefault()
setSuggestions(INITIAL_SUGGESTIONS)
break
default:
break
}
}}
/>
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<Dropdown show={suggestions.array.length > 0}>
<Dropdown.Menu className={styles.suggestionsMenu}>
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{suggestions.array.map((v, i) =>
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<Dropdown.Item
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key={v.name}
active={suggestions.index === i}
onClick={() => {
setOValue(v.name)
setSuggestions(INITIAL_SUGGESTIONS)
}}
>
{v.name}
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</Dropdown.Item>)}
</Dropdown.Menu>
</Dropdown>
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</FormGroup>
)
}
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export function Input ({ label, groupClassName, ...props }) {
return (
<FormGroup label={label} className={groupClassName}>
<InputInner {...props} />
</FormGroup>
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)
}
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export function VariableInput ({ label, groupClassName, name, hint, max, min, readOnlyLen, ...props }) {
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return (
<FormGroup label={label} className={groupClassName}>
<FieldArray name={name}>
{({ form, ...fieldArrayHelpers }) => {
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const options = form.values[name]
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return (
<>
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{options?.map((_, i) => (
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<div key={i}>
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<Row className='mb-2'>
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<Col>
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<InputInner name={`${name}[${i}]`} {...props} readOnly={i < readOnlyLen} placeholder={i >= min ? 'optional' : undefined} />
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</Col>
{options.length - 1 === i && options.length !== max
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? <Col className='d-flex ps-0' xs='auto'><AddIcon className='fill-grey align-self-center justify-self-center pointer' onClick={() => fieldArrayHelpers.push('')} /></Col>
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: null}
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</Row>
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</div>
))}
</>
)
}}
</FieldArray>
{hint && (
<BootstrapForm.Text>
{hint}
</BootstrapForm.Text>
)}
</FormGroup>
)
}
export function Checkbox ({ children, label, groupClassName, hiddenLabel, extra, handleChange, inline, disabled, ...props }) {
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// React treats radios and checkbox inputs differently other input types, select, and textarea.
// Formik does this too! When you specify `type` to useField(), it will
// return the correct bag of props for you
const [field,, helpers] = useField({ ...props, type: 'checkbox' })
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return (
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<FormGroup className={groupClassName}>
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{hiddenLabel && <BootstrapForm.Label className='invisible'>{label}</BootstrapForm.Label>}
<BootstrapForm.Check
id={props.id || props.name}
inline={inline}
>
<BootstrapForm.Check.Input
{...field} {...props} disabled={disabled} type='checkbox' onChange={(e) => {
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field.onChange(e)
handleChange && handleChange(e.target.checked, helpers.setValue)
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}}
/>
<BootstrapForm.Check.Label className={'d-flex' + (disabled ? ' text-muted' : '')}>
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<div className='flex-grow-1'>{label}</div>
{extra &&
<div className={styles.checkboxExtra}>
{extra}
</div>}
</BootstrapForm.Check.Label>
</BootstrapForm.Check>
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</FormGroup>
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)
}
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const StorageKeyPrefixContext = createContext()
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export function Form ({
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initial, schema, onSubmit, children, initialError, validateImmediately, storageKeyPrefix, ...props
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}) {
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const [error, setError] = useState(initialError)
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return (
<Formik
initialValues={initial}
validationSchema={schema}
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initialTouched={validateImmediately && initial}
validateOnBlur={false}
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onSubmit={async (values, ...args) =>
onSubmit && onSubmit(values, ...args).then(() => {
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if (!storageKeyPrefix) return
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Object.keys(values).forEach(v => {
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window.localStorage.removeItem(storageKeyPrefix + '-' + v)
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if (Array.isArray(values[v])) {
values[v].forEach(
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(_, i) => window.localStorage.removeItem(`${storageKeyPrefix}-${v}[${i}]`))
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}
}
)
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}).catch(e => setError(e.message || e))}
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>
<FormikForm {...props} noValidate>
{error && <Alert variant='danger' onClose={() => setError(undefined)} dismissible>{error}</Alert>}
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<StorageKeyPrefixContext.Provider value={storageKeyPrefix}>
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{children}
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</StorageKeyPrefixContext.Provider>
</FormikForm>
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</Formik>
)
}
export function Select ({ label, items, groupClassName, onChange, noForm, overrideValue, ...props }) {
const [field, meta, helpers] = noForm ? [{}, {}, {}] : useField(props)
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const formik = noForm ? null : useFormikContext()
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const invalid = meta.touched && meta.error
useEffect(() => {
if (overrideValue) {
helpers.setValue(overrideValue)
}
}, [overrideValue])
return (
<FormGroup label={label} className={groupClassName}>
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<BootstrapForm.Select
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{...field} {...props}
onChange={(e) => {
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if (field?.onChange) {
field.onChange(e)
}
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if (onChange) {
onChange(formik, e)
}
}}
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isInvalid={invalid}
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>
{items.map(item => <option key={item}>{item}</option>)}
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</BootstrapForm.Select>
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<BootstrapForm.Control.Feedback type='invalid'>
{meta.touched && meta.error}
</BootstrapForm.Control.Feedback>
</FormGroup>
)
}