1 files changed, 23 insertions, 0 deletions
diff --git a/public/assets/js/util/format.js b/public/assets/js/util/format.js
index 6a23430..e6104e5 100644
--- a/public/assets/js/util/format.js
+++ b/public/assets/js/util/format.js
@@ -257,6 +257,29 @@ function get_age(t, long) {
   age /= 12;
   return r(age) + (long ? " years" : "y");
 }
+const ages = {
+  newest: 60 * 10,
+  newer: 60 * 60,
+  new: 60 * 60 * 8,
+  cool: 60 * 60 * 24,
+  cold: 60 * 60 * 24 * 7,
+  colder: 60 * 60 * 24 * 7 * 4,
+  coldest: 60 * 60 * 24 * 7 * 4 * 12,
+};
+function get_age_opacity(t) {
+  var age = Math.abs(Date.now() / 1000 - t);
+  if (age < ages.newest) return 1;
+  if (age < ages.newer)
+    return lerp(norm(age, ages.newest, ages.newer), 1.0, 0.95);
+  if (age < ages.new) return lerp(norm(age, ages.newer, ages.new), 0.95, 0.9);
+  if (age < ages.cool) return lerp(norm(age, ages.new, ages.cool), 0.9, 0.85);
+  if (age < ages.cold) return lerp(norm(age, ages.cool, ages.cold), 0.85, 0.6);
+  if (age < ages.colder)
+    return lerp(norm(age, ages.cold, ages.colder), 0.6, 0.5);
+  if (age < ages.coldest)
+    return lerp(norm(age, ages.colder, ages.coldest), 0.5, 0.4);
+  return 0.39;
+}
 
 function tidy_urls(s, short_urls) {
   var ret = s