Hello world!

ember/app/helpers/user-avatar.js

@@ -0,0 +1,53 @@
+import Ember from 'ember';
+
+function HSVtoRGB(h, s, v) {
+    var r, g, b, i, f, p, q, t;
+    if (h && s === undefined && v === undefined) {
+        s = h.s, v = h.v, h = h.h;
+    }
+    i = Math.floor(h * 6);
+    f = h * 6 - i;
+    p = v * (1 - s);
+    q = v * (1 - f * s);
+    t = v * (1 - (1 - f) * s);
+    switch (i % 6) {
+        case 0: r = v, g = t, b = p; break;
+        case 1: r = q, g = v, b = p; break;
+        case 2: r = p, g = v, b = t; break;
+        case 3: r = p, g = q, b = v; break;
+        case 4: r = t, g = p, b = v; break;
+        case 5: r = v, g = p, b = q; break;
+    }
+    return {
+        r: Math.floor(r * 255),
+        g: Math.floor(g * 255),
+        b: Math.floor(b * 255)
+    };
+}
+
+export default Ember.Handlebars.makeBoundHelper(function(user, options) {
+    if (!user) return;
+
+    var number;
+    if (number = user.get('avatarNumber')) {
+        number = number + '';
+        var filename = number.length >= 3 ? number : new Array(3 - number.length + 1).join('0') + number;
+        return new Handlebars.SafeString('<img src="/packages/flarum/core/avatars/'+filename+'.jpg" class="avatar '+options.hash.class+'">');
+    }
+
+	var username = user.get('username');
+    if (!username) username = '?';
+
+	var letter = username.charAt(0).toUpperCase();
+
+	var num = 0;
+	for (var i = 0; i < username.length; i++) {
+		num += username.charCodeAt(i) * 13;
+	}
+
+	var hue = num % 360;
+	var rgb = HSVtoRGB(hue / 360, 100 / 255, 200 / 255);
+	var bg = ''+rgb.r.toString(16)+rgb.g.toString(16)+rgb.b.toString(16);
+	return new Handlebars.SafeString('<span class="avatar '+options.hash.class+'" style="background:#'+bg+'" title="'+username+'">'+letter+'</span>');
+});
+