Misago/frontend/src/components/avatar.js

import React from "react"
import misago from "misago"

export default function(props) {
  const size = props.size || 100
  const size2x = props.size2x || size

  return (
    <img
      alt=""
      className={props.className || "user-avatar"}
      src={getSrc(props.user, size)}
      srcSet={getSrc(props.user, size2x)}
      width={size}
      height={size}
    />
  )
}

export function getSrc(user, size) {
  if (user && user.id) {
    // just avatar hash, size and user id
    return resolveAvatarForSize(user.avatars, size).url
  } else {
    // just append avatar size to file to produce no-avatar placeholder
    return misago.get("BLANK_AVATAR_URL")
  }
}

export function resolveAvatarForSize(avatars, size) {
  let avatar = avatars[0]
  avatars.forEach(av => {
    if (av.size >= size) {
      avatar = av
    }
  })
  return avatar
}