1 files changed, 15 insertions, 10 deletions
diff --git a/app/models/trends/links.rb b/app/models/trends/links.rb
index a0d65138b..a7cd9e29d 100644
--- a/app/models/trends/links.rb
+++ b/app/models/trends/links.rb
@@ -3,12 +3,17 @@
 class Trends::Links < Trends::Base
   PREFIX = 'trending_links'
 
-  self.default_options = {
-    threshold: 15,
-    review_threshold: 10,
-    max_score_cooldown: 2.days.freeze,
-    max_score_halflife: 8.hours.freeze,
-  }
+  # Minimum amount of uses by unique accounts to begin calculating the score
+  THRESHOLD = 15
+
+  # Minimum rank (lower = better) before requesting a review
+  REVIEW_THRESHOLD = 10
+
+  # For this amount of time, the peak score (if bigger than current score) is decayed-from
+  MAX_SCORE_COOLDOWN = 2.days.freeze
+
+  # How quickly a peak score decays
+  MAX_SCORE_HALFLIFE = 8.hours.freeze
 
   def register(status, at_time = Time.now.utc)
     original_status = status.reblog? ? status.reblog : status
@@ -76,10 +81,10 @@ class Trends::Links < Trends::Base
       observed  = preview_card.history.get(at_time).accounts.to_f
       max_time  = preview_card.max_score_at
       max_score = preview_card.max_score
-      max_score = 0 if max_time.nil? || max_time < (at_time - options[:max_score_cooldown])
+      max_score = 0 if max_time.nil? || max_time < (at_time - MAX_SCORE_COOLDOWN)
 
       score = begin
-        if expected > observed || observed < options[:threshold]
+        if expected > observed || observed < THRESHOLD
           0
         else
           ((observed - expected)**2) / expected
@@ -94,7 +99,7 @@ class Trends::Links < Trends::Base
         preview_card.update_columns(max_score: max_score, max_score_at: max_time)
       end
 
-      decaying_score = max_score * (0.5**((at_time.to_f - max_time.to_f) / options[:max_score_halflife].to_f))
+      decaying_score = max_score * (0.5**((at_time.to_f - max_time.to_f) / MAX_SCORE_HALFLIFE.to_f))
 
       if decaying_score.zero?
         redis.zrem("#{PREFIX}:all", preview_card.id)
@@ -112,6 +117,6 @@ class Trends::Links < Trends::Base
   end
 
   def would_be_trending?(id)
-    score(id) > score_at_rank(options[:review_threshold] - 1)
+    score(id) > score_at_rank(REVIEW_THRESHOLD - 1)
   end
 end