searchable: fix searching for invalid IP addresses.

Fix an ArgumentError exception when searching for an invalid IP address.

Also allow searching for multiple subnets at once.

app/logical/concerns/searchable.rb

@@ -71,11 +71,13 @@ module Searchable
 
   def where_inet_matches(attr, value)
     if value.match?(/[, ]/)
-      ips = value.split(/[, ]+/).map { |ip| Danbooru::IpAddress.new(ip).to_string }
-      where("#{qualified_column_for(attr)} = ANY(ARRAY[?]::inet[])", ips)
+      ips = value.split(/[, ]+/).map { |ip| Danbooru::IpAddress.parse(ip).to_s }
+      return none if ips.any?(&:blank?)
+      where("#{qualified_column_for(attr)} <<= ANY(ARRAY[?]::inet[])", ips)
     else
-      ip = Danbooru::IpAddress.new(value)
-      where("#{qualified_column_for(attr)} <<= ?", ip.to_string)
+      ip = Danbooru::IpAddress.parse(value)
+      return none if ip.nil?
+      where("#{qualified_column_for(attr)} <<= ?", ip.to_s)
     end
   end
 

app/logical/danbooru/ip_address.rb

@@ -9,6 +9,12 @@ module Danbooru
     delegate :ipv4?, :ipv6?, :loopback?, :link_local?, :unique_local?, :private?, :to_string, :network, :prefix, :multicast?, :unspecified?, to: :ip_address
     delegate :ip_info, :is_proxy?, to: :ip_lookup
 
+    def self.parse(string)
+      new(string)
+    rescue
+      nil
+    end
+
     def initialize(string)
       @ip_address = ::IPAddress.parse(string.to_s.strip)
     end