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import { useCallback, useState, useEffect } from "react";
import Cropper from "react-easy-crop";
import checkIfItFallbackImage from "@calcom/lib/checkIfItFallbackImage";
import { useLocale } from "@calcom/lib/hooks/useLocale";
import type { ButtonColor } from "../..";
import { Button, Dialog, DialogClose, DialogContent, DialogTrigger, DialogFooter } from "../..";
import { showToast } from "../toast";
import { useFileReader, createImage, Slider } from "./Common";
import type { FileEvent, Area } from "./Common";
type BannerUploaderProps = {
id: string;
buttonMsg: string;
handleAvatarChange: (imageSrc: string) => void;
imageSrc?: string;
target: string;
triggerButtonColor?: ButtonColor;
uploadInstruction?: string;
disabled?: boolean;
height: number;
width: number;
};
function CropContainer({
onCropComplete,
imageSrc,
}: {
imageSrc: string;
onCropComplete: (croppedAreaPixels: Area) => void;
}) {
const { t } = useLocale();
const [crop, setCrop] = useState({ x: 0, y: 0 });
const [zoom, setZoom] = useState(1);
const handleZoomSliderChange = (value: number) => {
value < 1 ? setZoom(1) : setZoom(value);
};
return (
<div className="flex flex-col items-center justify-center">
<div className="relative h-52 w-[40rem]">
<Cropper
image={imageSrc}
crop={crop}
zoom={zoom}
aspect={3}
onCropChange={setCrop}
onCropComplete={(croppedArea, croppedAreaPixels) => onCropComplete(croppedAreaPixels)}
onZoomChange={setZoom}
/>
</div>
<Slider
value={zoom}
min={1}
max={3}
step={0.1}
label={t("slide_zoom_drag_instructions")}
changeHandler={handleZoomSliderChange}
/>
</div>
);
}
export default function BannerUploader({
target,
id,
buttonMsg,
handleAvatarChange,
triggerButtonColor,
imageSrc,
uploadInstruction,
disabled = false,
height,
width,
}: BannerUploaderProps) {
const { t } = useLocale();
const [croppedAreaPixels, setCroppedAreaPixels] = useState<Area | null>(null);
const [{ result }, setFile] = useFileReader({
method: "readAsDataURL",
});
const onInputFile = async (e: FileEvent<HTMLInputElement>) => {
if (!e.target.files?.length) {
return;
}
const limit = 5 * 1000000; // max limit 5mb
const file = e.target.files[0];
if (file.size > limit) {
showToast(t("image_size_limit_exceed"), "error");
} else {
setFile(file);
}
};
const showCroppedImage = useCallback(
async (croppedAreaPixels: Area | null) => {
try {
if (!croppedAreaPixels) return;
const croppedImage = await getCroppedImg(
result as string /* result is always string when using readAsDataUrl */,
croppedAreaPixels,
height,
width
);
handleAvatarChange(croppedImage);
} catch (e) {
console.error(e);
}
},
[result, height, width, handleAvatarChange]
);
useEffect(() => {
const checkDimensions = async () => {
const image = await createImage(
result as string /* result is always string when using readAsDataUrl */
);
if (image.naturalWidth !== width || image.naturalHeight !== height) {
showToast(t("org_banner_instructions", { height, width }), "warning");
}
};
if (result) {
checkDimensions();
}
}, [result]);
return (
<Dialog
onOpenChange={(opened) => {
// unset file on close
if (!opened) {
setFile(null);
}
}}>
<DialogTrigger asChild>
<Button
color={triggerButtonColor ?? "secondary"}
type="button"
disabled={disabled}
data-testid={`open-upload-${target}-dialog`}
className="cursor-pointer py-1 text-sm">
{buttonMsg}
</Button>
</DialogTrigger>
<DialogContent className="sm:w-[45rem] sm:max-w-[45rem]" title={t("upload_target", { target })}>
<div className="mb-4">
<div className="cropper mt-6 flex flex-col items-center justify-center p-8">
{!result && (
<div className="bg-muted flex h-60 w-full items-center justify-start">
{!imageSrc || checkIfItFallbackImage(imageSrc) ? (
<p className="text-emphasis w-full text-center text-sm sm:text-xs">
{t("no_target", { target })}
</p>
) : (
// eslint-disable-next-line @next/next/no-img-element
<img className="h-full w-full" src={imageSrc} alt={target} />
)}
</div>
)}
{result && <CropContainer imageSrc={result as string} onCropComplete={setCroppedAreaPixels} />}
<label
data-testid="open-upload-image-filechooser"
className="bg-subtle hover:bg-muted hover:text-emphasis border-subtle text-default mt-8 cursor-pointer rounded-sm border px-3 py-1 text-xs font-medium leading-4 focus:outline-none focus:ring-2 focus:ring-neutral-900 focus:ring-offset-1">
<input
onInput={onInputFile}
type="file"
name={id}
placeholder={t("upload_image")}
className="text-default pointer-events-none absolute mt-4 opacity-0 "
accept="image/*"
/>
{t("choose_a_file")}
</label>
{uploadInstruction && (
<p className="text-muted mt-4 text-center text-sm">({uploadInstruction})</p>
)}
</div>
</div>
<DialogFooter className="relative">
<DialogClose color="minimal">{t("cancel")}</DialogClose>
<DialogClose
data-testid="upload-avatar"
color="primary"
onClick={() => showCroppedImage(croppedAreaPixels)}>
{t("save")}
</DialogClose>
</DialogFooter>
</DialogContent>
</Dialog>
);
}
async function getCroppedImg(
imageSrc: string,
pixelCrop: Area,
height: number,
width: number
): Promise<string> {
const image = await createImage(imageSrc);
const canvas = document.createElement("canvas");
const ctx = canvas.getContext("2d");
if (!ctx) throw new Error("Context is null, this should never happen.");
canvas.width = width;
canvas.height = height;
ctx.drawImage(
image,
pixelCrop.x,
pixelCrop.y,
pixelCrop.width,
pixelCrop.height,
0,
0,
canvas.width,
canvas.height
);
return canvas.toDataURL("image/png");
}

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import * as SliderPrimitive from "@radix-ui/react-slider";
import { useEffect, useState } from "react";
import type { FormEvent } from "react";
type ReadAsMethod = "readAsText" | "readAsDataURL" | "readAsArrayBuffer" | "readAsBinaryString";
type UseFileReaderProps = {
method: ReadAsMethod;
onLoad?: (result: unknown) => void;
};
export const useFileReader = (options: UseFileReaderProps) => {
const { method = "readAsText", onLoad } = options;
const [file, setFile] = useState<File | null>(null);
const [loading, setLoading] = useState<boolean>(false);
const [error, setError] = useState<DOMException | null>(null);
const [result, setResult] = useState<string | ArrayBuffer | null>(null);
useEffect(() => {
if (!file && result) {
setResult(null);
}
}, [file, result]);
useEffect(() => {
if (!file) {
return;
}
const reader = new FileReader();
reader.onloadstart = () => setLoading(true);
reader.onloadend = () => setLoading(false);
reader.onerror = () => setError(reader.error);
reader.onload = (e: ProgressEvent<FileReader>) => {
setResult(e.target?.result ?? null);
if (onLoad) {
onLoad(e.target?.result ?? null);
}
};
reader[method](file);
}, [file, method, onLoad]);
return [{ result, error, file, loading }, setFile] as const;
};
export const createImage = (url: string) =>
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;
});
export const Slider = ({
value,
label,
changeHandler,
...props
}: Omit<SliderPrimitive.SliderProps, "value"> & {
value: number;
label: string;
changeHandler: (value: number) => void;
}) => (
<SliderPrimitive.Root
className="slider mt-2"
value={[value]}
aria-label={label}
onValueChange={(value: number[]) => changeHandler(value[0] ?? value)}
{...props}>
<SliderPrimitive.Track className="slider-track">
<SliderPrimitive.Range className="slider-range" />
</SliderPrimitive.Track>
<SliderPrimitive.Thumb className="slider-thumb" />
</SliderPrimitive.Root>
);
export interface FileEvent<T = Element> extends FormEvent<T> {
target: EventTarget & T;
}
export type Area = {
width: number;
height: number;
x: number;
y: number;
};

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import { useCallback, useState } from "react";
import Cropper from "react-easy-crop";
import checkIfItFallbackImage from "@calcom/lib/checkIfItFallbackImage";
import { useLocale } from "@calcom/lib/hooks/useLocale";
import type { ButtonColor } from "../..";
import { Button, Dialog, DialogClose, DialogContent, DialogTrigger, DialogFooter } from "../..";
import { showToast } from "../toast";
import { useFileReader, createImage, Slider } from "./Common";
import type { FileEvent, Area } from "./Common";
const MAX_IMAGE_SIZE = 512;
type ImageUploaderProps = {
id: string;
buttonMsg: string;
handleAvatarChange: (imageSrc: string) => void;
imageSrc?: string;
target: string;
triggerButtonColor?: ButtonColor;
uploadInstruction?: string;
disabled?: boolean;
testId?: string;
};
// This is separate to prevent loading the component until file upload
function CropContainer({
onCropComplete,
imageSrc,
}: {
imageSrc: string;
onCropComplete: (croppedAreaPixels: Area) => void;
}) {
const { t } = useLocale();
const [crop, setCrop] = useState({ x: 0, y: 0 });
const [zoom, setZoom] = useState(1);
const handleZoomSliderChange = (value: number) => {
value < 1 ? setZoom(1) : setZoom(value);
};
return (
<div className="crop-container h-40 max-h-40 w-40 rounded-full">
<div className="relative h-40 w-40 rounded-full">
<Cropper
image={imageSrc}
crop={crop}
zoom={zoom}
aspect={1}
onCropChange={setCrop}
onCropComplete={(croppedArea, croppedAreaPixels) => onCropComplete(croppedAreaPixels)}
onZoomChange={setZoom}
/>
</div>
<Slider
value={zoom}
min={1}
max={3}
step={0.1}
label={t("slide_zoom_drag_instructions")}
changeHandler={handleZoomSliderChange}
/>
</div>
);
}
export default function ImageUploader({
target,
id,
buttonMsg,
handleAvatarChange,
triggerButtonColor,
imageSrc,
uploadInstruction,
disabled = false,
testId,
}: ImageUploaderProps) {
const { t } = useLocale();
const [croppedAreaPixels, setCroppedAreaPixels] = useState<Area | null>(null);
const [{ result }, setFile] = useFileReader({
method: "readAsDataURL",
});
const onInputFile = (e: FileEvent<HTMLInputElement>) => {
if (!e.target.files?.length) {
return;
}
const limit = 5 * 1000000; // max limit 5mb
const file = e.target.files[0];
if (file.size > limit) {
showToast(t("image_size_limit_exceed"), "error");
} else {
setFile(file);
}
};
const showCroppedImage = useCallback(
async (croppedAreaPixels: Area | null) => {
try {
if (!croppedAreaPixels) return;
const croppedImage = await getCroppedImg(
result as string /* result is always string when using readAsDataUrl */,
croppedAreaPixels
);
handleAvatarChange(croppedImage);
} catch (e) {
console.error(e);
}
},
[result, handleAvatarChange]
);
return (
<Dialog
onOpenChange={(opened) => {
// unset file on close
if (!opened) {
setFile(null);
}
}}>
<DialogTrigger asChild>
<Button
color={triggerButtonColor ?? "secondary"}
type="button"
disabled={disabled}
data-testid={testId ? `open-upload-${testId}-dialog` : "open-upload-avatar-dialog"}
className="cursor-pointer py-1 text-sm">
{buttonMsg}
</Button>
</DialogTrigger>
<DialogContent title={t("upload_target", { target })}>
<div className="mb-4">
<div className="cropper mt-6 flex flex-col items-center justify-center p-8">
{!result && (
<div className="bg-muted flex h-20 max-h-20 w-20 items-center justify-start rounded-full">
{!imageSrc || checkIfItFallbackImage(imageSrc) ? (
<p className="text-emphasis w-full text-center text-sm sm:text-xs">
{t("no_target", { target })}
</p>
) : (
// eslint-disable-next-line @next/next/no-img-element
<img className="h-20 w-20 rounded-full" src={imageSrc} alt={target} />
)}
</div>
)}
{result && <CropContainer imageSrc={result as string} onCropComplete={setCroppedAreaPixels} />}
<label
data-testid={testId ? `open-upload-${testId}-filechooser` : "open-upload-image-filechooser"}
className="bg-subtle hover:bg-muted hover:text-emphasis border-subtle text-default mt-8 cursor-pointer rounded-sm border px-3 py-1 text-xs font-medium leading-4 focus:outline-none focus:ring-2 focus:ring-neutral-900 focus:ring-offset-1">
<input
onInput={onInputFile}
type="file"
name={id}
placeholder={t("upload_image")}
className="text-default pointer-events-none absolute mt-4 opacity-0 "
accept="image/*"
/>
{t("choose_a_file")}
</label>
{uploadInstruction && (
<p className="text-muted mt-4 text-center text-sm">({uploadInstruction})</p>
)}
</div>
</div>
<DialogFooter className="relative">
<DialogClose color="minimal">{t("cancel")}</DialogClose>
<DialogClose
data-testid={testId ? `upload-${testId}` : "upload-avatar"}
color="primary"
onClick={() => showCroppedImage(croppedAreaPixels)}>
{t("save")}
</DialogClose>
</DialogFooter>
</DialogContent>
</Dialog>
);
}
async function getCroppedImg(imageSrc: string, pixelCrop: Area): Promise<string> {
const image = await createImage(imageSrc);
const canvas = document.createElement("canvas");
const ctx = canvas.getContext("2d");
if (!ctx) throw new Error("Context is null, this should never happen.");
const maxSize = Math.max(image.naturalWidth, image.naturalHeight);
const resizeRatio = MAX_IMAGE_SIZE / maxSize < 1 ? Math.max(MAX_IMAGE_SIZE / maxSize, 0.75) : 1;
// huh, what? - Having this turned off actually improves image quality as otherwise anti-aliasing is applied
// this reduces the quality of the image overall because it anti-aliases the existing, copied image; blur results
ctx.imageSmoothingEnabled = false;
// pixelCrop is always 1:1 - width = height
canvas.width = canvas.height = Math.min(maxSize * resizeRatio, pixelCrop.width);
ctx.drawImage(
image,
pixelCrop.x,
pixelCrop.y,
pixelCrop.width,
pixelCrop.height,
0,
0,
canvas.width,
canvas.height
);
// on very low ratios, the quality of the resize becomes awful. For this reason the resizeRatio is limited to 0.75
if (resizeRatio <= 0.75) {
// With a smaller image, thus improved ratio. Keep doing this until the resizeRatio > 0.75.
return getCroppedImg(canvas.toDataURL("image/png"), {
width: canvas.width,
height: canvas.height,
x: 0,
y: 0,
});
}
return canvas.toDataURL("image/png");
}

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import { Canvas, Meta, Story } from "@storybook/addon-docs";
import { Title, VariantRow, VariantsTable, CustomArgsTable } from "@calcom/storybook/components";
import ImageUploader from "./ImageUploader";
<Meta title="UI/ImageUploader" component={ImageUploader} />
<Title title="ImageUploader" suffix="Brief" subtitle="Version 1.0 — Last Update: 21 Aug 2023" />
## Definitions
`ImageUploader` is used to upload images of all image types
## Structure
Below are the props for `Image uploader`
<CustomArgsTable of={ImageUploader} />
## ImageUploader Story
<Canvas>
<Story
parameters={{
nextjs: {
appDirectory: true,
},
}}
name="ImageUploader"
play={({ canvasElement }) => {
const darkVariantContainer = canvasElement.querySelector("#dark-variant");
const imageUploaderElement = darkVariantContainer.querySelector("button");
imageUploaderElement?.addEventListener("click", () => {
setTimeout(() => {
document.querySelector('[role="dialog"]')?.classList.add("dark");
}, 1);
});
}}
args={{
id: "image-1",
buttonMsg: "upload",
target: "target",
handleAvatarChange: (src) => {
console.debug(src);
},
}}>
{({ id, buttonMsg, handleAvatarChange, imageSrc, target }) => (
<VariantsTable titles={["Default"]} columnMinWidth={150}>
<VariantRow>
<ImageUploader
id={id}
buttonMsg={buttonMsg}
handleAvatarChange={handleAvatarChange}
imageSrc={imageSrc}
target={target}
/>
</VariantRow>
</VariantsTable>
)}
</Story>
</Canvas>

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export { default as ImageUploader } from "./ImageUploader";
export { default as BannerUploader } from "./BannerUploader";