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import React, { useState, useRef } from 'react';
import {
Paper,
Typography,
Box,
Button,
IconButton
} from '@material-ui/core';
import CloudUploadIcon from '@material-ui/icons/CloudUpload';
import DeleteIcon from '@material-ui/icons/Delete';
import { makeStyles } from '@material-ui/core/styles';
const useStyles = makeStyles((theme) => ({
paper: {
padding: theme.spacing(2),
display: 'flex',
flexDirection: 'column',
alignItems: 'center',
height: '100%',
minHeight: 300,
transition: 'all 0.3s ease'
},
dragActive: {
border: '2px dashed #3f51b5',
backgroundColor: 'rgba(63, 81, 181, 0.05)'
},
dragInactive: {
border: '2px dashed #ccc',
backgroundColor: 'white'
},
uploadBox: {
display: 'flex',
flexDirection: 'column',
alignItems: 'center',
justifyContent: 'center',
height: '100%',
width: '100%',
cursor: 'pointer'
},
uploadIcon: {
fontSize: 60,
color: '#3f51b5',
marginBottom: theme.spacing(2)
},
supportText: {
marginTop: theme.spacing(2)
},
previewBox: {
display: 'flex',
flexDirection: 'column',
alignItems: 'center',
width: '100%',
height: '100%',
position: 'relative'
},
imageContainer: {
position: 'relative',
width: '100%',
// Use a smaller viewport-based height so any aspect ratio fits inside
height: '45vh',
[theme.breakpoints.down('sm')]: {
height: '35vh',
},
display: 'flex',
justifyContent: 'center',
alignItems: 'center',
overflow: 'hidden',
marginTop: theme.spacing(2),
},
deleteButton: {
position: 'absolute',
top: 0,
right: 0,
backgroundColor: 'rgba(255, 255, 255, 0.7)',
'&:hover': {
backgroundColor: 'rgba(255, 255, 255, 0.9)',
}
}
}));
const ImageUploader = ({ onImageUpload }) => {
const classes = useStyles();
const [previewUrl, setPreviewUrl] = useState(null);
const [dragActive, setDragActive] = useState(false);
const fileInputRef = useRef(null);
const handleDrag = (e) => {
e.preventDefault();
e.stopPropagation();
if (e.type === 'dragenter' || e.type === 'dragover') {
setDragActive(true);
} else if (e.type === 'dragleave') {
setDragActive(false);
}
};
const handleDrop = (e) => {
e.preventDefault();
e.stopPropagation();
setDragActive(false);
if (e.dataTransfer.files && e.dataTransfer.files[0]) {
handleFiles(e.dataTransfer.files[0]);
}
};
const handleChange = (e) => {
e.preventDefault();
if (e.target.files && e.target.files[0]) {
handleFiles(e.target.files[0]);
}
};
const handleFiles = (file) => {
if (file.type.startsWith('image/')) {
setPreviewUrl(URL.createObjectURL(file));
onImageUpload(file);
} else {
alert('Please upload an image file');
}
};
const onButtonClick = () => {
fileInputRef.current.click();
};
const handleRemoveImage = () => {
setPreviewUrl(null);
onImageUpload(null);
fileInputRef.current.value = "";
};
return (
<Paper
className={`${classes.paper} ${dragActive ? classes.dragActive : classes.dragInactive}`}
onDragEnter={handleDrag}
onDragLeave={handleDrag}
onDragOver={handleDrag}
onDrop={handleDrop}
>
<input
ref={fileInputRef}
type="file"
accept="image/*"
onChange={handleChange}
style={{ display: 'none' }}
/>
{!previewUrl ? (
<Box
className={classes.uploadBox}
onClick={onButtonClick}
>
<CloudUploadIcon className={classes.uploadIcon} />
<Typography variant="h6" gutterBottom>
Drag & Drop an image here
</Typography>
<Typography variant="body2" color="textSecondary" gutterBottom>
or
</Typography>
<Button
variant="contained"
color="primary"
component="span"
startIcon={<CloudUploadIcon />}
>
Browse Files
</Button>
<Typography variant="body2" color="textSecondary" className={classes.supportText}>
Supported formats: JPG, PNG, GIF
</Typography>
</Box>
) : (
<Box className={classes.previewBox}>
<Typography variant="h6" gutterBottom>
Preview
</Typography>
<Box className={classes.imageContainer}>
<img
src={previewUrl}
alt="Preview"
className="preview-image"
style={{
maxWidth: '100%',
maxHeight: '100%',
width: 'auto',
height: 'auto',
objectFit: 'contain',
display: 'block'
}}
/>
<IconButton
aria-label="delete"
className={classes.deleteButton}
onClick={handleRemoveImage}
>
<DeleteIcon />
</IconButton>
</Box>
</Box>
)}
</Paper>
);
};
export default ImageUploader;
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