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import React, { useState, useEffect, useRef } from 'react'
import Icon from './Icon'
import Button from './Button'
import UploadButton from './UploadButton'
import toast from 'react-hot-toast'
/**
* StackOverflow-driven development: https://stackoverflow.com/a/10158364/1097384
* @param {HTMLTextAreaElement & {createTextRange?: Function}} el element
*/
function moveCaretToEnd(el) {
if (typeof el.selectionStart == 'number') {
el.selectionStart = el.selectionEnd = el.value.length
} else if (typeof el.createTextRange != 'undefined') {
// Internet Explorer
el.focus()
var range = el.createTextRange()
range.collapse(false)
range.select()
}
}
/** @external Promise */
/**
* @typedef {object} MessageInputProps
* @property {string} text text
* @property {function({body:string, attach:string | File}):Promise<boolean>} onSend onSend
* @property {number=} rows rows
* @property {string=} placeholder placeholder
*/
/**
* MessageInput
* @param {React.ComponentProps<React.FC> & MessageInputProps} props props
*/
export default function MessageInput({ text, rows, placeholder, onSend }) {
/**
* @type {React.MutableRefObject<HTMLTextAreaElement?>}
*/
let textareaRef = useRef(null)
/**
* @type {React.MutableRefObject<HTMLInputElement?>}
*/
let fileinput = useRef(null)
let updateFocus = () => {
const isDesktop = window.matchMedia('(min-width: 62.5rem)')
if (isDesktop.matches) {
const textarea = textareaRef.current
if (textarea) {
textarea.focus()
moveCaretToEnd(textarea)
}
}
}
useEffect(() => {
textChanged({
target: {
value: text
}
})
updateFocus()
}, [text])
let [body, setBody] = useState(text)
let handleCtrlEnter = (event) => {
if (event.ctrlKey && (event.charCode == 10 || event.charCode == 13)) {
onSubmit({})
}
}
const textChanged = (event) => {
setBody(event.target.value)
const el = textareaRef.current
if (el) {
const offset = el.offsetHeight - el.clientHeight
const height = el.scrollHeight + offset
el.style.height = `${height + offset}px`
}
}
const [attach, setAttach] = useState('')
let uploadValueChanged = (attach) => {
setAttach(attach)
}
let onSubmit = (event) => {
if (event.preventDefault) {
event.preventDefault()
}
const input = fileinput.current
if (input && input.files) {
onSend({
body: body,
attach: attach ? input.files[0] : ''
}).then((success) => {
if (success) {
setAttach('')
setBody('')
if (textareaRef.current) {
textareaRef.current.style.height = ''
}
updateFocus()
} else {
toast('Can not update this message')
}
}).catch(console.log)
}
}
return (
<form className="msg-comment-target" style={{ padding: '12px', width: '100%' }} onSubmit={onSubmit}>
<div style={commentStyle}>
<textarea onChange={textChanged} onKeyPress={handleCtrlEnter}
ref={textareaRef} style={textInputStyle}
rows={rows || 1} placeholder={placeholder} value={body || ''} />
<div style={inputBarStyle}>
<UploadButton inputRef={fileinput} value={attach} onChange={uploadValueChanged} />
<Button onClick={onSubmit}><Icon name="ei-envelope" size="s" />Send</Button>
</div>
</div>
</form>
)
}
/**
* @type {React.CSSProperties}
*/
const commentStyle = {
display: 'flex',
flexDirection: 'column',
width: '100%',
marginTop: '10px'
}
/**
* @type {React.CSSProperties}
*/
const inputBarStyle = {
display: 'flex',
alignItems: 'center',
justifyContent: 'space-between',
padding: '3px'
}
/**
* @type {React.CSSProperties}
*/
const textInputStyle = {
overflow: 'hidden',
resize: 'none',
display: 'block',
boxSizing: 'border-box',
border: 0,
outline: 'none',
padding: '4px'
}
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