3 files changed, 42 insertions, 0 deletions
diff --git a/app/models/location.rb b/app/models/location.rb
index b7c5bf5..e008270 100644
--- a/app/models/location.rb
+++ b/app/models/location.rb
@@ -2,5 +2,6 @@ class Location < ApplicationRecord
   include HasWhatnot
 
   has_many :activities
+  has_many :monster_spawns
   validates :gid, :name, presence: true
 end
diff --git a/app/models/monster_spawn.rb b/app/models/monster_spawn.rb
new file mode 100644
index 0000000..d34e390
--- /dev/null
+++ b/app/models/monster_spawn.rb
@@ -0,0 +1,35 @@
+class MonsterSpawn < ApplicationRecord
+  belongs_to :monster
+  belongs_to :location
+  has_many :monster_spawn_combats
+
+  after_update :check_hp
+  after_create :send_chat_message
+
+  def alive?
+    self.remaining_hp > 0
+  end
+
+  def remaining_hp
+    self.monster.max_hp - MonsterSpawnCombat.where(monster_spawn: self).sum(:hp_lost)
+  end
+
+  private
+    def send_chat_message
+      chat_message = ChatMessage.new(body: "A leviathan has appeared in #{location.name}!",
+                                     chat_room: ChatRoom.find_by_gid("news"))
+      if chat_message.save
+        ChatRoomChannel.broadcast_chat_message(chat_message)
+      end
+    end
+
+    def check_hp
+      if alive?
+        chat_message = ChatMessage.new(body: "The #{monster.name} in #{location.name} has been slain!",
+                                       chat_room: ChatRoom.find_by_gid("news"))
+        if chat_message.save
+          ChatRoomChannel.broadcast_chat_message(chat_message)
+        end
+      end
+    end
+end
diff --git a/app/models/monster_spawn_combat.rb b/app/models/monster_spawn_combat.rb
new file mode 100644
index 0000000..50a565b
--- /dev/null
+++ b/app/models/monster_spawn_combat.rb
@@ -0,0 +1,6 @@
+class MonsterSpawnCombat < ApplicationRecord
+  belongs_to :monster_spawn
+  belongs_to :character
+
+  validates :hp_lost, numericality: { greater_than_or_equal_to: 0, only_integer: true }
+end