diff options
Diffstat (limited to 'rbot/plugins.rb')
| -rw-r--r-- | rbot/plugins.rb | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/rbot/plugins.rb b/rbot/plugins.rb new file mode 100644 index 00000000..b99fe562 --- /dev/null +++ b/rbot/plugins.rb @@ -0,0 +1,242 @@ +module Irc + + # base class for all rbot plugins + # certain methods will be called if they are provided, if you define one of + # the following methods, it will be called as appropriate: + # + # listen(UserMessage):: + # Called for all messages of any type. To + # differentiate them, use message.kind_of? It'll be + # either a PrivMessage, NoticeMessage, KickMessage, + # QuitMessage, PartMessage, JoinMessage, NickMessage, + # etc. + # + # privmsg(PrivMessage):: + # called for a PRIVMSG if the first word matches one + # the plugin register()d for. Use m.plugin to get + # that word and m.params for the rest of the message, + # if applicable. + # + # kick(KickMessage):: + # Called when a user (or the bot) is kicked from a + # channel the bot is in. + # + # join(JoinMessage):: + # Called when a user (or the bot) joins a channel + # + # part(PartMessage):: + # Called when a user (or the bot) parts a channel + # + # quit(QuitMessage):: + # Called when a user (or the bot) quits IRC + # + # nick(NickMessage):: + # Called when a user (or the bot) changes Nick + # topic(TopicMessage):: + # Called when a user (or the bot) changes a channel + # topic + # + # save:: Called when you are required to save your plugin's + # state, if you maintain data between sessions + # + # cleanup:: called before your plugin is "unloaded", prior to a + # plugin reload or bot quit - close any open + # files/connections or flush caches here + class Plugin + # initialise your plugin. Always call super if you override this method, + # as important variables are set up for you + def initialize + @bot = Plugins.bot + @names = Array.new + @registry = BotRegistryAccessor.new(@bot, self.class.to_s.gsub(/^.*::/, "")) + end + + # return an identifier for this plugin, defaults to a list of the message + # prefixes handled (used for error messages etc) + def name + @names.join("|") + end + + # return a help string for your module. for complex modules, you may wish + # to break your help into topics, and return a list of available topics if + # +topic+ is nil. +plugin+ is passed containing the matching prefix for + # this message - if your plugin handles multiple prefixes, make sure your + # return the correct help for the prefix requested + def help(plugin, topic) + "no help" + end + + # register the plugin as a handler for messages prefixed +name+ + # this can be called multiple times for a plugin to handle multiple + # message prefixes + def register(name) + Plugins.plugins[name] = self + @names << name + end + + # is this plugin listening to all messages? + def listen? + @listen + end + + end + + # class to manage multiple plugins and delegate messages to them for + # handling + class Plugins + # hash of registered message prefixes and associated plugins + @@plugins = Hash.new + # associated IrcBot class + @@bot = nil + + # bot:: associated IrcBot class + # dirlist:: array of directories to scan (in order) for plugins + # + # create a new plugin handler, scanning for plugins in +dirlist+ + def initialize(bot, dirlist) + @@bot = bot + @dirs = dirlist + scan + end + + # access to associated bot + def Plugins.bot + @@bot + end + + # access to list of plugins + def Plugins.plugins + @@plugins + end + + # load plugins from pre-assigned list of directories + def scan + dirs = Array.new + dirs << File.dirname(__FILE__) + "/plugins" + dirs += @dirs + dirs.each {|dir| + if(FileTest.directory?(dir)) + d = Dir.new(dir) + d.each {|file| + next if(file =~ /^\./) + next unless(file =~ /\.rb$/) + @tmpfilename = "#{dir}/#{file}" + + # create a new, anonymous module to "house" the plugin + plugin_module = Module.new + + begin + plugin_string = IO.readlines(@tmpfilename).join("") + puts "loading module: #{@tmpfilename}" + plugin_module.module_eval(plugin_string) + rescue StandardError, NameError, LoadError, SyntaxError => err + puts "plugin #{@tmpfilename} load failed: " + err + puts err.backtrace.join("\n") + end + } + end + } + end + + # call the save method for each active plugin + def save + @@plugins.values.uniq.each {|p| + next unless(p.respond_to?("save")) + begin + p.save + rescue StandardError, NameError, SyntaxError => err + puts "plugin #{p.name} save() failed: " + err + puts err.backtrace.join("\n") + end + } + end + + # call the cleanup method for each active plugin + def cleanup + @@plugins.values.uniq.each {|p| + next unless(p.respond_to?("cleanup")) + begin + p.cleanup + rescue StandardError, NameError, SyntaxError => err + puts "plugin #{p.name} cleanup() failed: " + err + puts err.backtrace.join("\n") + end + } + end + + # drop all plugins and rescan plugins on disk + # calls save and cleanup for each plugin before dropping them + def rescan + save + cleanup + @@plugins = Hash.new + scan + end + + # return list of help topics (plugin names) + def helptopics + if(@@plugins.length > 0) + # return " [plugins: " + @@plugins.keys.sort.join(", ") + "]" + return " [#{length} plugins: " + @@plugins.values.uniq.collect{|p| p.name}.sort.join(", ") + "]" + else + return " [no plugins active]" + end + end + + def length + @@plugins.values.uniq.length + end + + # return help for +topic+ (call associated plugin's help method) + def help(topic="") + if(topic =~ /^(\S+)\s*(.*)$/) + key = $1 + params = $2 + if(@@plugins.has_key?(key)) + begin + return @@plugins[key].help(key, params) + rescue StandardError, NameError, SyntaxError => err + puts "plugin #{@@plugins[key].name} help() failed: " + err + puts err.backtrace.join("\n") + end + else + return false + end + end + end + + # see if each plugin handles +method+, and if so, call it, passing + # +message+ as a parameter + def delegate(method, message) + @@plugins.values.uniq.each {|p| + if(p.respond_to? method) + begin + p.send method, message + rescue StandardError, NameError, SyntaxError => err + puts "plugin #{p.name} #{method}() failed: " + err + puts err.backtrace.join("\n") + end + end + } + end + + # see if we have a plugin that wants to handle this message, if so, pass + # it to the plugin and return true, otherwise false + def privmsg(m) + return unless(m.plugin) + if (@@plugins.has_key?(m.plugin) && + @@plugins[m.plugin].respond_to?("privmsg") && + @@bot.auth.allow?(m.plugin, m.source, m.replyto)) + begin + @@plugins[m.plugin].privmsg(m) + rescue StandardError, NameError, SyntaxError => err + puts "plugin #{@@plugins[m.plugin].name} privmsg() failed: " + err + puts err.backtrace.join("\n") + end + return true + end + return false + end + end + +end |