# File lib/facebooker/session.rb, line 87
    def self.api_key
      extract_key_from_environment(:api) || extract_key_from_configuration_file(:api) rescue report_inability_to_find_key(:api)
    end

# File lib/facebooker/session.rb, line 709
    def self.configuration_file_path
      @configuration_file_path || File.expand_path("~/.facebookerrc")
    end

# File lib/facebooker/session.rb, line 713
    def self.configuration_file_path=(path)
      @configuration_file_path = path
    end

# File lib/facebooker/session.rb, line 80
    def self.create(api_key=nil, secret_key=nil)
      api_key ||= self.api_key
      secret_key ||= self.secret_key
      raise ArgumentError unless !api_key.nil? && !secret_key.nil?
      new(api_key, secret_key)
    end

# File lib/facebooker/session.rb, line 95
    def self.current
      Thread.current['facebook_session']
    end

# File lib/facebooker/session.rb, line 99
    def self.current=(session)
      Thread.current['facebook_session'] = session
    end

# File lib/facebooker/session.rb, line 171
    def initialize(api_key, secret_key)
      @api_key        = api_key
      @secret_key     = secret_key
      @batch_request  = nil
      @session_key    = nil
      @uid            = nil
      @auth_token     = nil
      @secret_from_session = nil
      @expires        = nil
    end

# File lib/facebooker/session.rb, line 91
    def self.secret_key
      extract_key_from_environment(:secret) || extract_key_from_configuration_file(:secret) rescue report_inability_to_find_key(:secret)
    end

# File lib/facebooker/session.rb, line 521
    def active_template_bundles
      post("facebook.feed.getRegisteredTemplateBundles",{},false)
    end

# File lib/facebooker/session.rb, line 146
    def add_next_parameters(options)
      opts = []
      opts << "&next=#{CGI.escape(options[:next])}" if options[:next]
      opts << "&next_cancel=#{CGI.escape(options[:next_cancel])}" if options[:next_cancel]
      opts
    end

# File lib/facebooker/session.rb, line 469
    def add_tags(pid, x, y, tag_uid = nil, tag_text = nil )
      if [tag_uid, tag_text].all? {|arg| arg.nil?}
        raise ArgumentError, "Must enter a name or string for this tag"        
      end
      @tags = post('facebook.photos.addTag', :pid => pid, :tag_uid => tag_uid, :tag_text => tag_text, :x => x, :y => y )
    end

# File lib/facebooker/session.rb, line 620
    def add_to_batch(req,&proc)
      batch_request = BatchRequest.new(req,proc)
      Thread.current[:facebooker_current_batch_queue]<<batch_request
      batch_request
    end

# File lib/facebooker/session.rb, line 387
    def admin
      Facebooker::Admin.new(self)
    end

# File lib/facebooker/session.rb, line 391
    def application
      Facebooker::Application.new(self)
    end

# File lib/facebooker/session.rb, line 186
    def auth_token
      @auth_token ||= post 'facebook.auth.createToken'
    end

# File lib/facebooker/session.rb, line 661
    def batch(serial_only=false)
      @batch_request=true
      Thread.current[:facebooker_current_batch_queue]=[]
      yield
      # Set the batch request to false so that post will execute the batch job
      @batch_request=false
      BatchRun.current_batch=Thread.current[:facebooker_current_batch_queue]
      post("facebook.batch.run",:method_feed=>BatchRun.current_batch.map{|q| q.uri}.to_json,:serial_only=>serial_only.to_s)
    ensure
      @batch_request=false
      BatchRun.current_batch=nil
    end

# File lib/facebooker/session.rb, line 616
    def batch_request?
      @batch_request
    end

# File lib/facebooker/session.rb, line 331
    def cancel_event(eid, options = {})
      result = post('facebook.events.cancel', options.merge(:eid => eid))
      result == '1' ? true : false
    end

# File lib/facebooker/session.rb, line 405
    def check_friendship(array_of_pairs_of_users)
      uids1 = []
      uids2 = []
      array_of_pairs_of_users.each do |pair|
        uids1 << pair.first
        uids2 << pair.last
      end
      post('facebook.friends.areFriends', :uids1 => uids1.join(','), :uids2 => uids2.join(','))
    end

# File lib/facebooker/session.rb, line 133
    def connect_permission_url(permission,options={})
      options = default_login_url_options.merge(options)
      options = add_next_parameters(options)
      options << "&ext_perm=#{permission}"
      "#{Facebooker.connect_permission_url_base}#{options.join}"
    end

# File lib/facebooker/session.rb, line 302
    def create_event(event_info, multipart_post_file = nil)
      if defined?(ActiveSupport::TimeWithZone) && defined?(ActiveSupport::TimeZone)
        # Facebook expects all event local times to be in Pacific Time, so we need to take the actual local time and 
        # send it to Facebook as if it were Pacific Time converted to Unix epoch timestamp. Very confusing...
        facebook_time = ActiveSupport::TimeZone["Pacific Time (US & Canada)"]
        
        start_time = event_info.delete(:start_time) || event_info.delete('start_time')
        if start_time && start_time.is_a?(ActiveSupport::TimeWithZone)
          event_info['start_time'] = facebook_time.parse(start_time.strftime("%Y-%m-%d %H:%M:%S")).to_i
        else
          event_info['start_time'] = start_time
        end
        
        end_time = event_info.delete(:end_time) || event_info.delete('end_time')
        if end_time && end_time.is_a?(ActiveSupport::TimeWithZone)
          event_info['end_time'] = facebook_time.parse(end_time.strftime("%Y-%m-%d %H:%M:%S")).to_i
        else
          event_info['end_time'] = end_time
        end
      end
      
      post_file('facebook.events.create', :event_info => event_info.to_json, nil => multipart_post_file)
    end

# File lib/facebooker/session.rb, line 383
    def data
      Facebooker::Data.new(self)
    end

# File lib/facebooker/session.rb, line 517
    def deactivate_template_bundle_by_id(template_bundle_id)
      post("facebook.feed.deactivateTemplateBundleByID", {:template_bundle_id => template_bundle_id.to_s}, false)
    end

# File lib/facebooker/session.rb, line 167
    def default_login_url_options
      {}
    end

# File lib/facebooker/session.rb, line 336
    def event_members(eid)
      @members ||= {}
      @members[eid] ||= post('facebook.events.getMembers', :eid => eid) do |response|
        response.map do |attendee_hash|
          Event::Attendance.from_hash(attendee_hash)
        end
      end
    end

# File lib/facebooker/session.rb, line 287
    def events(options = {})
      @events ||= {}
      @events[options.to_s] ||= post('facebook.events.get', options) do |response|
        response.map do |hash|
          Event.from_hash(hash)
        end
      end
    end

# File lib/facebooker/session.rb, line 194
    def expired?
      @expires.nil? || (!infinite? && Time.at(@expires) <= Time.now)
    end

# File lib/facebooker/session.rb, line 590
    def fields_to_serialize
      %w(session_key uid expires secret_from_session auth_token api_key secret_key)
    end

# File lib/facebooker/session.rb, line 218
    def fql_build_object(type, hash)
      case type
      when 'user'
        user = User.new
        user.session = self
        user.populate_from_hash!(hash)
        user
      when 'photo'
        Photo.from_hash(hash)
      when 'album'
        Album.from_hash(hash)
      when 'page'
        Page.from_hash(hash)
      when 'page_admin'
        Page.from_hash(hash)
      when 'group'
        Group.from_hash(hash)
      when 'event'
        Event.from_hash(hash)
      when 'event_member'
        Event::Attendance.from_hash(hash)
      else
        hash
      end
    end

# File lib/facebooker/session.rb, line 257
    def fql_multiquery(queries, format = 'XML')
      results = {}
      post('facebook.fql.multiquery', :queries => queries.to_json, :format => format) do |responses|
        responses.each do |response|
          name = response.shift
          response = response.shift
          type = response.shift
          value = [] 
          unless type.nil?
            value = response.shift.map do |hash|
              fql_build_object(type, hash)
            end
          end
          results[name] = value
        end
      end
      results
    end

# File lib/facebooker/session.rb, line 244
    def fql_query(query, format = 'XML')
      post('facebook.fql.query', :query => query, :format => format) do |response|
        type = response.shift
        if type.nil?
          []
        else
          response.shift.map do |hash|
            fql_build_object(type, hash)
          end
        end
      end
    end

# File lib/facebooker/session.rb, line 442
    def get_albums(aids)
      @albums = post('facebook.photos.getAlbums', :aids => aids) do |response|
        response.map do |hash|        
          Album.from_hash(hash)
        end
      end
    end

# File lib/facebooker/session.rb, line 434
    def get_comments(xid)
      @comments = post('facebook.comments.get', :xid => xid) do |response|
        response.map do |hash|
          Comment.from_hash(hash)
        end
      end
    end

# File lib/facebooker/session.rb, line 415
    def get_photos(pids = nil, subj_id = nil,  aid = nil)
      if [subj_id, pids, aid].all? {|arg| arg.nil?}
        raise ArgumentError, "Can't get a photo without a picture, album or subject ID" 
      end
      # We have to normalize params orherwise FB complain about signature
      params = {:pids => pids, :subj_id => subj_id, :aid => aid}.delete_if { |k,v| v.nil? }
      @photos = post('facebook.photos.get', params ) do |response|
        response.map do |hash|
          Photo.from_hash(hash)
        end
      end
    end

# File lib/facebooker/session.rb, line 454
    def get_stream(viewer_id, options = {})

      @stream = post('facebook.stream.get', prepare_get_stream_options(viewer_id, options), true) do |response|
        response
      end
    end

# File lib/facebooker/session.rb, line 461
    def get_tags(pids)
      @tags = post('facebook.photos.getTags', :pids => pids)  do |response|
        response.map do |hash|
          Tag.from_hash(hash)
        end
      end
    end

# File lib/facebooker/session.rb, line 190
    def infinite?
      @expires == 0
    end

# File lib/facebooker/session.rb, line 108
    def install_url(options={})
      "#{Facebooker.install_url_base}#{install_url_optional_parameters(options)}"
    end

# File lib/facebooker/session.rb, line 140
    def install_url_optional_parameters(options)
      optional_parameters = []      
      optional_parameters += add_next_parameters(options)
      optional_parameters.join
    end

# File lib/facebooker/session.rb, line 582
    def instance_variable_set_value(field, value)
      self.instance_variable_set("@#{field}", value)
    end

# File lib/facebooker/session.rb, line 586
    def instance_variable_value(field)
      self.instance_variable_get("@#{field}")
    end

# File lib/facebooker/session.rb, line 368
    def is_fan(page_id, uid)
      puts "Deprecated. Use Page#user_is_fan? instead"
      Page.new(page_id).user_is_fan?(uid)
    end

# File lib/facebooker/session.rb, line 103
    def login_url(options={})
      options = default_login_url_options.merge(options)
      "#{Facebooker.login_url_base}#{login_url_optional_parameters(options)}"
    end

# File lib/facebooker/session.rb, line 153
    def login_url_optional_parameters(options)
      # It is important that unused options are omitted as stuff like &canvas=false will still display the canvas. 
      optional_parameters = []
      optional_parameters += add_next_parameters(options)
      optional_parameters << "&skipcookie=true" if options[:skip_cookie]
      optional_parameters << "&hide_checkbox=true" if options[:hide_checkbox]
      optional_parameters << "&canvas=true" if options[:canvas]
      optional_parameters << "&fbconnect=true" if options[:fbconnect]
      optional_parameters << "&return_session=true" if options[:return_session]
      optional_parameters << "&session_key_only=true" if options[:session_key_only]
      optional_parameters << "&req_perms=#{options[:req_perms]}" if options[:req_perms]
      optional_parameters.join
    end

# File lib/facebooker/session.rb, line 395
    def mobile
      Facebooker::Mobile.new(self)
    end

# File lib/facebooker/session.rb, line 357
    def pages(options = {})
      raise ArgumentError, 'fields option is mandatory' unless options.has_key?(:fields)
      @pages ||= {}
      @pages[options] ||= post('facebook.pages.getInfo', options) do |response|
        response.map do |hash|
          Page.from_hash(hash)
        end
      end
    end

# File lib/facebooker/session.rb, line 126
    def permission_url(permission,options={})
      options = default_login_url_options.merge(options)
      options = add_next_parameters(options)
      options << "&ext_perm=#{permission}"
      "#{Facebooker.permission_url_base}#{options.join}"
    end

# File lib/facebooker/session.rb, line 687
    def post(method, params = {}, use_session_key = true, &proc)
      if batch_request? or Facebooker::Logging.skip_api_logging
        post_without_logging(method, params, use_session_key, &proc)
      else
        Logging.log_fb_api(method, params) do
          post_without_logging(method, params, use_session_key, &proc)
        end
      end
    end

# File lib/facebooker/session.rb, line 697
    def post_file(method, params = {})
      base = params.delete(:base)
      Logging.log_fb_api(method, params) do
        add_facebook_params(params, method)
        @session_key && params[:session_key] ||= @session_key unless params[:uid]
        service.post_file(params.merge(:base => base, :sig => signature_for(params.reject{|key, value| key.nil?})))
      end
    end

# File lib/facebooker/session.rb, line 674
    def post_without_logging(method, params = {}, use_session_key = true, &proc)
      add_facebook_params(params, method)
      use_session_key && @session_key && params[:session_key] ||= @session_key
      final_params=params.merge(:sig => signature_for(params))
      if batch_request?
        add_to_batch(final_params,&proc)
      else
        result = service.post(final_params)
        result = yield result if block_given?
        result
      end
    end

# File lib/facebooker/session.rb, line 529
    def publish_user_action(bundle_id,data={},target_ids=nil,body_general=nil,story_size=nil)
      parameters={:template_bundle_id=>bundle_id,:template_data=>data.to_json}
      parameters[:target_ids] = target_ids unless target_ids.blank?
      parameters[:body_general] = body_general unless body_general.blank?
      parameters[:story_size] = story_size unless story_size.nil?
      post("facebook.feed.publishUserAction", parameters)
    end

# File lib/facebooker/session.rb, line 493
    def register_template_bundle(one_line_story_templates,short_story_templates=nil,full_story_template=nil, action_links=nil)
      templates = ensure_array(one_line_story_templates)
      parameters = {:one_line_story_templates => templates.to_json}
      
      unless action_links.blank?
        parameters[:action_links] = action_links.to_json
      end
      
      unless short_story_templates.blank?
        templates = ensure_array(short_story_templates)
        parameters[:short_story_templates] = templates.to_json
      end
      
      unless full_story_template.blank?
        parameters[:full_story_template] = full_story_template.to_json
      end
      
      post("facebook.feed.registerTemplateBundle", parameters, false)
    end

# File lib/facebooker/session.rb, line 429
    def remove_comment(xid,comment_id)
      post('facebook.comments.remove', :xid=>xid, :comment_id =>comment_id)
    end

# File lib/facebooker/session.rb, line 182
    def secret_for_method(method_name)
      @secret_key
    end

# File lib/facebooker/session.rb, line 202
    def secure!(args = {})
      response = post 'facebook.auth.getSession', :auth_token => auth_token, :generate_session_secret => args[:generate_session_secret] ? "1" : "0"
      secure_with!(response['session_key'], response['uid'], response['expires'], response['secret'])
    end

# File lib/facebooker/session.rb, line 211
    def secure_with!(session_key, uid = nil, expires = nil, secret_from_session = nil)
      @session_key = session_key
      @uid = uid ? Integer(uid) : post('facebook.users.getLoggedInUser', :session_key => session_key)
      @expires = expires ? Integer(expires) : 0
      @secret_from_session = secret_from_session
    end

# File lib/facebooker/session.rb, line 207
    def secure_with_session_secret!
      self.secure!(:generate_session_secret => true)
    end

# File lib/facebooker/session.rb, line 198
    def secured?
      !@session_key.nil? && !expired?
    end

# File lib/facebooker/session.rb, line 555
    def send_email(user_ids, subject, text, fbml = nil)       
      user_ids = Array(user_ids)
      params = {:fbml => fbml, :recipients => user_ids.map{ |id| User.cast_to_facebook_id(id)}.join(','), :text => text, :subject => subject} 
      post 'facebook.notifications.sendEmail', params, false
    end

# File lib/facebooker/session.rb, line 476
    def send_notification(user_ids, fbml, email_fbml = nil)
      params = {:notification => fbml, :to_ids => user_ids.map{ |id| User.cast_to_facebook_id(id)}.join(',')}
      if email_fbml
        params[:email] = email_fbml
      end
      params[:type]="user_to_user"
      # if there is no uid, this is an announcement
      unless uid?
        params[:type]="app_to_user"
      end

      post 'facebook.notifications.send', params,uid?
    end

# File lib/facebooker/session.rb, line 377
    def server_cache
      Facebooker::ServerCache.new(self)
    end

# File lib/facebooker/session.rb, line 572
    def to_yaml( opts = {} )
      YAML::quick_emit(self.object_id, opts) do |out|
        out.map(taguri) do |map|
          fields_to_serialize.each do |field|
            map.add(field, instance_variable_value(field))
          end
        end
      end
    end

# File lib/facebooker/session.rb, line 545
    def upload_native_strings(native_strings)
      raise ArgumentError, "You must provide strings to upload" if native_strings.nil?

      post('facebook.intl.uploadNativeStrings', :native_strings => Facebooker.json_encode(native_strings)) do |response|
        response
      end
    end

# File lib/facebooker/session.rb, line 276
    def user
      @user ||= User.new(uid, self)
    end

# File lib/facebooker/session.rb, line 351
    def users(user_ids, fields=[])
      post("facebook.users.getInfo",:uids=>user_ids.join(","),:fields=>User.user_fields(fields)) do |users|
        users.map { |u| User.new(u)}
      end
    end

# File lib/facebooker/session.rb, line 345
    def users_standard(user_ids, fields=[])
      post("facebook.users.getStandardInfo",:uids=>user_ids.join(","),:fields=>User.standard_fields(fields)) do |users|
        users.map { |u| User.new(u)}
      end
    end