/ip_addresses: allow searching multiple IPs at once.

Fixes #4208. Allow searching for multiple IPs or user IDs. Separate
using spaces or commas.

app/models/application_record.rb

@@ -51,8 +51,13 @@ class ApplicationRecord < ActiveRecord::Base
       end
 
       def where_inet_matches(attr, value)
-        ip = IPAddress.parse(value)
-        where("#{qualified_column_for(attr)} <<= ?", ip.to_string)
+        if value.match?(/[, ]/)
+          ips = value.split(/[, ]+/).map { |ip| IPAddress.parse(ip).to_string }
+          where("#{qualified_column_for(attr)} = ANY(ARRAY[?]::inet[])", ips)
+        else
+          ip = IPAddress.parse(value)
+          where("#{qualified_column_for(attr)} <<= ?", ip.to_string)
+        end
       end
 
       def where_array_includes_any(attr, values)

app/models/tag.rb

@@ -371,8 +371,8 @@ class Tag < ApplicationRecord
       when /\A>(.+)/
         return [:gt, parse_cast($1, type)]
 
-      when /,/
-        return [:in, range.split(/,/).map {|x| parse_cast(x, type)}]
+      when /[, ]/
+        return [:in, range.split(/[, ]+/).map {|x| parse_cast(x, type)}]
 
       else
         return [:eq, parse_cast(range, type)]

app/views/ip_addresses/_index_by_ip_addr.html.erb

@@ -1,3 +1,7 @@
+<p>
+  <%= link_to "Find all users associated with the top 10 IP addresses", ip_addresses_path(search: { ip_addr: @ip_addresses.map(&:to_s).take(10).join(" "), group_by: "user" }) %>
+</p>
+
 <table class="striped autofit">
   <thead>
     <tr>

app/views/ip_addresses/_index_by_user.html.erb

@@ -1,3 +1,7 @@
+<p>
+  <%= link_to "Find all IP addresses associated with these users", ip_addresses_path(search: { user_id: @ip_addresses.map(&:user_id).join(" "), group_by: "ip_addr" }) %>
+</p>
+
 <table class="striped autofit">
   <thead>
     <tr>