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code improvement and accept image only for image uploader input

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This commit is contained in:
Syed Ali Shahbaz 2021-08-12 16:08:01 +05:30
parent 0c3ec98062
commit 867e582342
2 changed files with 31 additions and 30 deletions
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57
components/ImageUploader.tsx
View file

@ -6,8 +6,8 @@ export default function ImageUploader({target, id, buttonMsg, handleAvatarChange
const [imageDataUrl, setImageDataUrl] = useState<string>();
const [croppedAreaPixels, setCroppedAreaPixels] = useState();
const [rotation] = useState(1);
const [crop, setCrop] = useState({ x: 0, y: 0 })
const [zoom, setZoom] = useState(1)
const [crop, setCrop] = useState({ x: 0, y: 0 });
const [zoom, setZoom] = useState(1);
const [imageLoaded, setImageLoaded] = useState(false);
const [isImageShown, setIsImageShown] = useState(false);
const [shownImage, setShownImage] = useState<string>();
@ -16,7 +16,7 @@ export default function ImageUploader({target, id, buttonMsg, handleAvatarChange
// TODO
// PUSH cropped image to the database in column = target
const openUploaderModal = () => {
imageRef ? (setIsImageShown(true), setShownImage(imageRef)) : setIsImageShown(false)
imageRef ? (setIsImageShown(true), setShownImage(imageRef)) : setIsImageShown(false);
setImageUploadModalOpen(!imageUploadModalOpen)
}
@ -34,14 +34,14 @@ export default function ImageUploader({target, id, buttonMsg, handleAvatarChange
const readFile = (file) => {
return new Promise((resolve) => {
const reader = new FileReader()
reader.addEventListener('load', () => resolve(reader.result), false)
const reader = new FileReader();
reader.addEventListener('load', () => resolve(reader.result), false);
reader.readAsDataURL(file)
})
}
const onCropComplete = useCallback((croppedArea, croppedAreaPixels) => {
setCroppedAreaPixels(croppedAreaPixels)
setCroppedAreaPixels(croppedAreaPixels);
}, [])
@ -53,53 +53,53 @@ export default function ImageUploader({target, id, buttonMsg, handleAvatarChange
const createImage = (url) =>
new Promise<HTMLImageElement>((resolve, reject) => {
const image = new Image()
image.addEventListener('load', () => resolve(image))
image.addEventListener('error', error => reject(error))
image.setAttribute('crossOrigin', 'anonymous') // needed to avoid cross-origin issues on CodeSandbox
image.src = url
const image = new Image();
image.addEventListener('load', () => resolve(image));
image.addEventListener('error', error => reject(error));
image.setAttribute('crossOrigin', 'anonymous'); // needed to avoid cross-origin issues on CodeSandbox
image.src = url;
})
function getRadianAngle(degreeValue) {
return (degreeValue * Math.PI) / 180
return (degreeValue * Math.PI) / 180;
}
async function getCroppedImg(imageSrc, pixelCrop, rotation = 0) {
const image = await createImage(imageSrc)
const canvas = document.createElement('canvas')
const ctx = canvas.getContext('2d')
const image = await createImage(imageSrc);
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
const maxSize = Math.max(image.width, image.height)
const safeArea = 2 * ((maxSize / 2) * Math.sqrt(2))
const maxSize = Math.max(image.width, image.height);
const safeArea = 2 * ((maxSize / 2) * Math.sqrt(2));
// set each dimensions to double largest dimension to allow for a safe area for the
// image to rotate in without being clipped by canvas context
canvas.width = safeArea
canvas.height = safeArea
canvas.width = safeArea;
canvas.height = safeArea;
// translate canvas context to a central location on image to allow rotating around the center.
ctx.translate(safeArea / 2, safeArea / 2)
ctx.rotate(getRadianAngle(rotation))
ctx.translate(-safeArea / 2, -safeArea / 2)
ctx.translate(safeArea / 2, safeArea / 2);
ctx.rotate(getRadianAngle(rotation));
ctx.translate(-safeArea / 2, -safeArea / 2);
// draw rotated image and store data.
ctx.drawImage(
image,
safeArea / 2 - image.width * 0.5,
safeArea / 2 - image.height * 0.5
)
const data = ctx.getImageData(0, 0, safeArea, safeArea)
);
const data = ctx.getImageData(0, 0, safeArea, safeArea);
// set canvas width to final desired crop size - this will clear existing context
canvas.width = pixelCrop.width
canvas.height = pixelCrop.height
canvas.width = pixelCrop.width;
canvas.height = pixelCrop.height;
// paste generated rotate image with correct offsets for x,y crop values.
ctx.putImageData(
data,
Math.round(0 - safeArea / 2 + image.width * 0.5 - pixelCrop.x),
Math.round(0 - safeArea / 2 + image.height * 0.5 - pixelCrop.y)
)
);
// As Base64 string
return canvas.toDataURL('image/jpeg');
@ -128,7 +128,7 @@ export default function ImageUploader({target, id, buttonMsg, handleAvatarChange
} catch (e) {
console.error(e)
}
}, [croppedAreaPixels, rotation])
}, [croppedAreaPixels, rotation]);
return (
<div className="flex justify-center items-center">
@ -205,6 +205,7 @@ export default function ImageUploader({target, id, buttonMsg, handleAvatarChange
name={id}
placeholder="Upload image"
className="mt-4 cursor-pointer opacity-0 absolute"
accept="image/*"
/>
</div>
</div>

4
pages/settings/profile.tsx
View file

@ -46,9 +46,9 @@ export default function Settings(props) {
const handleAvatarChange = (newAvatar) => {
avatarRef.current.value = newAvatar;
var nativeInputValueSetter = Object.getOwnPropertyDescriptor(window.HTMLInputElement.prototype, "value").set;
const nativeInputValueSetter = Object.getOwnPropertyDescriptor(window.HTMLInputElement.prototype, "value").set;
nativeInputValueSetter.call(avatarRef.current, newAvatar);
var ev2 = new Event('input', { bubbles: true});
const ev2 = new Event('input', { bubbles: true});
avatarRef.current.dispatchEvent(ev2);
updateProfileHandler(ev2);
setImageSrc(newAvatar);