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import React, { useState, useEffect, useRef } from 'react';
import Icon from './Icon';
import Button from './Button';
import UploadButton from './UploadButton';
/**
* StackOverflow-driven development: https://stackoverflow.com/a/10158364/1097384
* @param {HTMLTextAreaElement} el
*/
function moveCaretToEnd(el) {
if (typeof el.selectionStart == 'number') {
el.selectionStart = el.selectionEnd = el.value.length;
} else if (typeof el.createTextRange != 'undefined') {
el.focus();
var range = el.createTextRange();
range.collapse(false);
range.select();
}
}
/**
* @typedef {Object} MessageInputProps
* @property {string} text
* @property {import('../api').Message} data
* @property {function} onSend
* @property {number} rows
* @property {string} children
*/
/**
* MessageInput
* @param {React.ReactNode & MessageInputProps} props
*/
export default function MessageInput({ text, data, rows, children, onSend }) {
/**
* @type {React.MutableRefObject<HTMLTextAreaElement>}
*/
let textareaRef = useRef();
/**
* @type {React.MutableRefObject<HTMLInputElement>}
*/
let fileinput = useRef();
let updateFocus = () => {
const isDesktop = window.matchMedia('(min-width: 62.5rem)');
if (isDesktop.matches) {
textareaRef.current.focus();
moveCaretToEnd(textareaRef.current);
}
};
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;
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;
onSend({
mid: data.mid,
rid: data.rid || 0,
body: body,
attach: attach ? input.files[0] : '',
to: data.to || {}
});
setAttach('');
setBody('');
textareaRef.current.style.height = '';
updateFocus();
};
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={children} 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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