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127 lines
3.1 KiB
127 lines
3.1 KiB
import {colors, theme} from 'app/client/ui2018/cssVars';
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import {FullUser} from 'app/common/LoginSessionAPI';
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import {dom, DomElementArg, styled} from 'grainjs';
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export type Size = 'small' | 'medium' | 'large';
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/**
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* Returns a DOM element showing a circular icon with a user's picture, or the user's initials if
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* picture is missing. Also varies the color of the circle when using initials.
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*/
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export function createUserImage(user: FullUser|null, size: Size, ...args: DomElementArg[]): HTMLElement {
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let initials: string;
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return cssUserImage(
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cssUserImage.cls('-' + size),
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(!user || user.anonymous) ? cssUserImage.cls('-anon') :
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[
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(user.picture ? cssUserPicture({src: user.picture}, dom.on('error', (ev, el) => dom.hideElem(el, true))) : null),
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dom.style('background-color', pickColor(user)),
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(initials = getInitials(user)).length > 1 ? cssUserImage.cls('-reduced') : null,
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initials!,
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],
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...args,
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);
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}
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/**
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* Extracts initials from a user, e.g. a FullUser. E.g. "Foo Bar" is turned into "FB", and
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* "foo@example.com" into just "f".
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*
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* Exported for testing.
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*/
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export function getInitials(user: {name?: string, email?: string}) {
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const source = (user.name && user.name.trim()) || (user.email && user.email.trim()) || '';
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return source.split(/\s+/, 2).map(p => p.slice(0, 1)).join('');
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}
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/**
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* Hashes the username to return a color.
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*/
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function pickColor(user: FullUser): string {
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let c = hashCode(user.name + ':' + user.email) % someColors.length;
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if (c < 0) { c += someColors.length; }
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return someColors[c];
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}
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/**
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* Hash a string into an integer. From https://stackoverflow.com/a/7616484/328565.
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*/
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function hashCode(str: string): number {
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let hash: number = 0;
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for (let i = 0; i < str.length; i++) {
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// tslint:disable-next-line:no-bitwise
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hash = ((hash << 5) - hash + str.charCodeAt(i)) | 0;
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}
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return hash;
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}
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// These mostly come from https://clrs.cc/
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const someColors = [
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'#0B437D',
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'#0074D9',
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'#7FDBFF',
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'#39CCCC',
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'#16DD6D',
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'#2ECC40',
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'#16B378',
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'#EFCC00',
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'#FF851B',
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'#FF4136',
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'#85144b',
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'#F012BE',
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'#B10DC9',
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];
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export const cssUserImage = styled('div', `
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position: relative;
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text-align: center;
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text-transform: uppercase;
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user-select: none;
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-moz-user-select: none;
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color: white;
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border-radius: 100px;
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display: flex;
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align-items: center;
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justify-content: center;
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&-small {
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width: 24px;
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height: 24px;
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font-size: 13.5px;
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--reduced-font-size: 12px;
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}
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&-medium {
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width: 32px;
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height: 32px;
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font-size: 18px;
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--reduced-font-size: 16px;
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}
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&-large {
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width: 40px;
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height: 40px;
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font-size: 22.5px;
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--reduced-font-size: 20px;
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}
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&-anon {
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border: 1px solid ${colors.slate};
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color: ${colors.slate};
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}
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&-anon::before {
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content: "?"
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}
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&-reduced {
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font-size: var(--reduced-font-size);
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}
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`);
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const cssUserPicture = styled('img', `
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position: absolute;
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width: 100%;
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height: 100%;
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object-fit: cover;
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background-color: ${theme.menuBg};
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border-radius: 100px;
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box-sizing: content-box; /* keep the border outside of the size of the image */
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`);
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