Add basic prayer support.

data/plugins/skill/prayer/plugin.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <plugin>
   <id>skill-prayer</id>
-  <version>1</version>
+  <version>0.9</version>
   <name>Prayer</name>
   <description>Adds the Prayer skill.</description>
   <authors>
@@ -10,6 +10,9 @@
   </authors>
   <scripts>
     <script>bury.rb</script>
+    <script>prayers.rb</script>
   </scripts>
-  <dependencies />
+  <dependencies>
+    <dependency>attributes</dependency>
+  </dependencies>
 </plugin>

data/plugins/skill/prayer/prayers.rb

@@ -0,0 +1,89 @@
+
+java_import 'org.apollo.game.message.impl.ConfigMessage'
+
+# Declares the active prayer attribute.
+declare_attribute(:active_prayer, -1, :persistent)
+
+
+# The hash of button ids to prayers.
+PRAYERS = {}
+
+# Intercept the ButtonMessage to toggle a prayer.
+on :message, :button do |ctx, player, message|
+    button = message.widget_id
+	prayer = PRAYERS[button]
+
+    unless prayer.nil?
+        if (prayer.level > player.skill_set.get_maximum_level(Skill::PRAYER))
+            update_setting(player, prayer, :off)
+            next
+        end
+        player.send_message("after level check")
+
+        previous = player.active_prayer
+
+        unless previous == -1
+            update_setting(player, PRAYERS[previous], :off)
+        end
+
+        if previous != button
+            player.send_message("Previous: #{previous}, new: #{button}.")
+            update_setting(player, prayer, :on)
+            player.active_prayer = button
+        end
+    end
+end
+
+private
+
+# A Prayer that can be activated by a player.
+class Prayer
+    attr_reader :name, :level, :button, :setting, :drain
+
+    def initialize(name, level, button, setting, drain)
+        @name = name
+    	@level = level
+    	@button = button
+    	@setting = setting
+    	@drain = drain
+    end
+
+end
+
+def update_setting(player, prayer, state)
+    value = (state == :on) ? 1 : 0
+    player.send_message("Toggling prayer #{prayer.name}, state: #{state}.")
+    player.send(ConfigMessage.new(prayer.setting, value))
+end
+
+# Appends a Prayer to the hash.
+def append_prayer(properties) 
+    raise 'Error: prayer properties hash must contain a name, level, button, setting, and drain.' unless properties.has_keys?(:name, :level, :button, :setting, :drain)
+
+    button = properties[:button]
+    PRAYERS[button] = Prayer.new(properties[:name], properties[:level], button, properties[:setting], properties[:drain])
+end
+
+# Don't deal with the actual effect here to avoid mess (TODO do it, but with attributes?).
+append_prayer name: :thick_skin,          level: 1,  button: 5609, setting: 83, drain: 0.01
+append_prayer name: :burst_of_strength,   level: 4,  button: 5610, setting: 84, drain: 0.01
+append_prayer name: :clarity_of_thought,  level: 7,  button: 5611, setting: 85, drain: 0.01
+append_prayer name: :rock_skin,           level: 10, button: 5612, setting: 86, drain: 0.04
+append_prayer name: :superhuman_strength, level: 13, button: 5613, setting: 87, drain: 0.04
+append_prayer name: :improved_reflexes,   level: 16, button: 5614, setting: 88, drain: 0.04
+
+append_prayer name: :rapid_restore, level: 19, button: 5615, setting: 89, drain: 0.01
+append_prayer name: :rapid_heal,    level: 22, button: 5615, setting: 90, drain: 0.01
+append_prayer name: :protect_item,  level: 25, button: 5617, setting: 91, drain: 0.01
+
+append_prayer name: :steel_skin,          level: 28, button: 5618, setting: 92, drain: 0.1
+append_prayer name: :ultimate_strength,   level: 31, button: 5619, setting: 93, drain: 0.1
+append_prayer name: :incredible_reflexes, level: 34, button: 5620, setting: 94, drain: 0.1
+
+append_prayer name: :protect_from_magic,    level: 37, button: 5621, setting: 95, drain: 0.15
+append_prayer name: :protect_from_missiles, level: 40, button: 5622, setting: 96, drain: 0.15
+append_prayer name: :protect_from_melee,    level: 43, button: 5633, setting: 97, drain: 0.15
+
+append_prayer name: :retribution, level: 46, button: 683, setting: 98,  drain: 0.15
+append_prayer name: :redemption,  level: 49, button: 684, setting: 99,  drain: 0.15
+append_prayer name: :smite,       level: 52, button: 685, setting: 100, drain: 0.2