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validate hex color

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This commit is contained in:
Bruno Windels 2020-04-28 10:59:10 +02:00
parent 19fc6a93ec
commit 4978f8a2a9
1 changed files with 15 additions and 2 deletions
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17
src/Avatar.js
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@ -53,6 +53,13 @@ export function avatarUrlForUser(user, width, height, resizeMethod) {
return url;
}
function isValidHexColor(color) {
return typeof color === "string" &&
(color.length === 7 || color.lengh === 9) &&
color.charAt(0) === "#" &&
!color.substr(1).split("").some(c => isNaN(parseInt(c, 16)));
}
function urlForColor(color) {
const size = 40;
const canvas = document.createElement("canvas");
@ -86,8 +93,14 @@ export function defaultAvatarUrlForString(s) {
const color = cssValue || defaultColors[colorIndex];
let dataUrl = colorToDataURLCache.get(color);
if (!dataUrl) {
dataUrl = urlForColor(color);
colorToDataURLCache.set(color, dataUrl);
// validate color as this can come from account_data
// with custom theming
if (isValidHexColor(color)) {
dataUrl = urlForColor(color);
colorToDataURLCache.set(color, dataUrl);
} else {
dataUrl = "";
}
}
return dataUrl;
}