Add better error messages for rate limits.

config/locales/server.en.yml

@@ -377,6 +377,17 @@ en:
   rate_limiter:
     slow_down: "You have performed this action too many times, try again later"
     too_many_requests: "We have a daily limit on how many times that action can be taken. Please wait %{time_left} before trying again."
+    by_type:
+      first_day_replies_per_day: "You've reached the maximum number of posts a user can post on their first day. Please wait %{time_left} before trying again."
+      first_day_topics_per_day: "You've reached the maximum number of topics a user can post on their first day. Please wait %{time_left} before trying again."
+      topics_per_day: "You've posted too many topics today. Please wait %{time_left} before trying again."
+      create_topic: "You're posting topics too quickly. Please wait %{time_left} before trying again."
+      create_post: "You're replying too quickly. Please wait %{time_left} before trying again."
+      pms_per_day: "You've sent too many messages today. Please wait %{time_left} before trying again."
+      create_like: "You've liked too many posts today. Please wait %{time_left} before trying again."
+      create_bookmark: "You've bookmarked too many posts today. Please wait %{time_left} before trying again."
+      edit_post: "You've edited too many posts today. Please wait %{time_left} before trying again."
+
     hours:
       one: "1 hour"
       other: "%{count} hours"

lib/edit_rate_limiter.rb

@@ -1,6 +1,10 @@
 require 'rate_limiter'
 class EditRateLimiter < RateLimiter
   def initialize(user)
-    super(user, "edit-post:#{Date.today}", SiteSetting.max_edits_per_day, 1.day.to_i)
+    super(user, "edit-post", SiteSetting.max_edits_per_day, 1.day.to_i)
+  end
+
+  def build_key(type)
+    "#{super(type)}:#{Date.today}"
   end
 end

lib/rate_limiter.rb

@@ -27,9 +27,14 @@ class RateLimiter
     $redis.delete_prefixed(RateLimiter.key_prefix)
   end
 
-  def initialize(user, key, max, secs)
+  def build_key(type)
+    "#{RateLimiter.key_prefix}:#{@user && @user.id}:#{type}"
+  end
+
+  def initialize(user, type, max, secs)
     @user = user
-    @key = "#{RateLimiter.key_prefix}:#{@user && @user.id}:#{key}"
+    @type = type
+    @key = build_key(type)
     @max = max
     @secs = secs
   end
@@ -53,7 +58,7 @@ class RateLimiter
       # let's ensure we expire this key at some point, otherwise we have leaks
       $redis.expire(@key, @secs * 2)
     else
-      raise LimitExceeded.new(seconds_to_wait)
+      raise RateLimiter::LimitExceeded.new(seconds_to_wait, @type)
     end
   end
 

lib/rate_limiter/limit_exceeded.rb

@@ -3,11 +3,13 @@ class RateLimiter
   # A rate limit has been exceeded.
   class LimitExceeded < StandardError
 
-    def initialize(available_in)
+    def initialize(available_in, type=nil)
       @available_in = available_in
+      @type = type
     end
 
     def description
+
       time_left = ""
       if @available_in < 1.minute.to_i
         time_left = I18n.t("rate_limiter.seconds", count: @available_in)
@@ -16,6 +18,13 @@ class RateLimiter
       else
         time_left = I18n.t("rate_limiter.hours", count: (@available_in / 1.hour.to_i))
       end
+
+      if @type.present?
+        type_key = @type.gsub(/-/, '_')
+        msg = I18n.t("rate_limiter.by_type.#{type_key}", time_left: time_left, default: "")
+        return msg if msg.present?
+      end
+
       I18n.t("rate_limiter.too_many_requests", time_left: time_left)
     end
   end