Extract MiniAvatarUploader into a reusable component

src/components/views/elements/MiniAvatarUploader.tsx

@@ -0,0 +1,90 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, {useContext, useRef, useState} from 'react';
+import classNames from 'classnames';
+
+import AccessibleButton from "./AccessibleButton";
+import Tooltip from './Tooltip';
+import MatrixClientContext from "../../../contexts/MatrixClientContext";
+import {useTimeout} from "../../../hooks/useTimeout";
+
+export const AVATAR_SIZE = 52;
+
+interface IProps {
+    hasAvatar: boolean;
+    noAvatarLabel?: string;
+    hasAvatarLabel?: string;
+    setAvatarUrl(url: string): Promise<void>;
+}
+
+const MiniAvatarUploader: React.FC<IProps> = ({ hasAvatar, hasAvatarLabel, noAvatarLabel, setAvatarUrl, children }) => {
+    const cli = useContext(MatrixClientContext);
+    const [busy, setBusy] = useState(false);
+    const [hover, setHover] = useState(false);
+    const [show, setShow] = useState(false);
+
+    useTimeout(() => {
+        setShow(true);
+    }, 3_000); // show after 3 seconds
+    useTimeout(() => {
+        setShow(false);
+    }, 13_000); // hide after being shown for 10 seconds
+
+    const uploadRef = useRef<HTMLInputElement>();
+
+    const label = hasAvatar || busy ? hasAvatarLabel : noAvatarLabel;
+
+    return <React.Fragment>
+        <input
+            type="file"
+            ref={uploadRef}
+            className="mx_MiniAvatarUploader_input"
+            onChange={async (ev) => {
+                if (!ev.target.files?.length) return;
+                setBusy(true);
+                const file = ev.target.files[0];
+                const uri = await cli.uploadContent(file);
+                await setAvatarUrl(uri);
+                setBusy(false);
+            }}
+            accept="image/*"
+        />
+
+        <AccessibleButton
+            className={classNames("mx_MiniAvatarUploader", {
+                mx_MiniAvatarUploader_busy: busy,
+                mx_MiniAvatarUploader_hasAvatar: hasAvatar,
+            })}
+            disabled={busy}
+            onClick={() => {
+                uploadRef.current.click();
+            }}
+            onMouseOver={() => setHover(true)}
+            onMouseLeave={() => setHover(false)}
+        >
+            { children }
+
+            <Tooltip
+                label={label}
+                visible={!!label && (hover || show)}
+                forceOnRight
+            />
+        </AccessibleButton>
+    </React.Fragment>;
+};
+
+export default MiniAvatarUploader;