BUSTED: what a mess. trying to get tournament round generation bits working. ack.

rails/map-mash/app/controllers/mash_tournaments_controller.rb

@@ -1,85 +1,62 @@
 class MashTournamentsController < ApplicationController
-  # GET /mash_tournaments
-  # GET /mash_tournaments.xml
   def index
     @mash_tournaments = MashTournament.all
 
     respond_to do |format|
-      format.html # index.html.erb
-      format.xml  { render :xml => @mash_tournaments }
+      format.html
     end
   end
 
-  # GET /mash_tournaments/1
-  # GET /mash_tournaments/1.xml
   def show
-    @mash_tournament = MashTournament.find(params[:id])
+    begin
+      @mash_tournament = MashTournament.find(params[:id])
+    rescue ActiveRecord::RecordNotFound
+      redirect_to :action => 'new' and return
+    end
+
+    if not @mash_tournament.done?
+      return if should_start_mashing?(request.remote_ip)
+    end
 
     respond_to do |format|
-      format.html # show.html.erb
-      format.xml  { render :xml => @mash_tournament }
+      format.html
     end
   end
 
-  # GET /mash_tournaments/new
-  # GET /mash_tournaments/new.xml
   def new
+    return if should_start_mashing?(request.remote_ip)
+
     @mash_tournament = MashTournament.new
 
     respond_to do |format|
-      format.html # new.html.erb
-      format.xml  { render :xml => @mash_tournament }
+      format.html
     end
   end
 
-  # GET /mash_tournaments/1/edit
-  def edit
-    @mash_tournament = MashTournament.find(params[:id])
-  end
-
-  # POST /mash_tournaments
-  # POST /mash_tournaments.xml
   def create
-    @mash_tournament = MashTournament.new(params[:mash_tournament])
+    return if should_start_mashing?(request.remote_ip)
+
+    @mash_tournament = MashTournament.new(
+      :requester => Requester.new(:ip => request.remote_ip)
+    )
 
     respond_to do |format|
       if @mash_tournament.save
-        flash[:notice] = 'MashTournament was successfully created.'
-        format.html { redirect_to(@mash_tournament) }
-        format.xml  { render :xml => @mash_tournament, :status => :created, :location => @mash_tournament }
+        flash[:notice] = "Let's start mashing!"
+        format.html { redirect_to :controller => 'mashes', :action => 'new' }
       else
         format.html { render :action => "new" }
-        format.xml  { render :xml => @mash_tournament.errors, :status => :unprocessable_entity }
       end
     end
   end
 
-  # PUT /mash_tournaments/1
-  # PUT /mash_tournaments/1.xml
-  def update
-    @mash_tournament = MashTournament.find(params[:id])
-
-    respond_to do |format|
-      if @mash_tournament.update_attributes(params[:mash_tournament])
-        flash[:notice] = 'MashTournament was successfully updated.'
-        format.html { redirect_to(@mash_tournament) }
-        format.xml  { head :ok }
-      else
-        format.html { render :action => "edit" }
-        format.xml  { render :xml => @mash_tournament.errors, :status => :unprocessable_entity }
-      end
+  private
+  def should_start_mashing?(ip)
+    if requester = Requester.find_by_ip(ip)
+      redirect_to :controller => 'mashes', :action => 'new'
+      return true
     end
-  end
 
-  # DELETE /mash_tournaments/1
-  # DELETE /mash_tournaments/1.xml
-  def destroy
-    @mash_tournament = MashTournament.find(params[:id])
-    @mash_tournament.destroy
-
-    respond_to do |format|
-      format.html { redirect_to(mash_tournaments_url) }
-      format.xml  { head :ok }
-    end
+    false
   end
 end

rails/map-mash/app/controllers/mashes_controller.rb

@@ -8,13 +8,16 @@ class MashesController < ApplicationController
   alias_method :show, :redirect_to_new
 
   def new
-    @map_a, @map_b = Map.pair
+    return if not already_registered?(request.remote_ip)
 
-    @mash = Mash.new(
-      :map_a => @map_a,
-      :map_b => @map_b,
-      :winner => @map_a
-    )
+    requester = Requester.find_by_ip(request.remote_ip)
+    @mash = requester.current_tournament.next_unplayed_mash
+
+    if not @mash
+      flash[:notice] = "You're done!"
+      redirect_to requester.current_tournament, :action => 'show'
+      return
+    end
 
     respond_to do |format|
       format.html
@@ -22,18 +25,18 @@ class MashesController < ApplicationController
   end
 
   def create
+    return if not already_registered?(request.remote_ip)
+
     mash_params = params[:mash].clone
     logger.info("Got params: #{params.inspect}")
 
-    requester = Requester.find_or_initialize_by_ip(request.remote_ip)
-    requester.save!
-    requester.reload
-    logger.info("Setting mash.requester_id from #{requester.inspect}")
+    requester = Requester.find_by_ip(request.remote_ip)
+    tournament = requester.mash_tournaments.first
+    mash_params[:tournament_id] = tournament.id
 
     logger.info("Creating mash with: #{mash_params.inspect}")
     @mash = Mash.new(mash_params)
 
-    @mash.requester_id = requester.id
     @winner = Map.find(@mash.winner_id.to_i)
     @winner.points += 1
 
@@ -48,4 +51,13 @@ class MashesController < ApplicationController
       end
     end
   end
+
+  def already_registered?(ip)
+    if not Requester.find_by_ip(ip)
+      redirect_to :controller => :mash_tournaments, :action => 'new'
+      return false
+    end
+
+    true
+  end
 end

rails/map-mash/app/models/map.rb

@@ -2,6 +2,8 @@ require 'fastercsv'
 
 
 class Map < ActiveRecord::Base
+  belongs_to :mash, :class_name => 'Mash'
+
   def self.from_city_name(city_name)
     self.find_or_initialize_by_name(city_name).save!
   end

rails/map-mash/app/models/mash.rb

@@ -2,5 +2,14 @@ class Mash < ActiveRecord::Base
   has_one :map_a, :class_name => 'Map'
   has_one :map_b, :class_name => 'Map'
   has_one :winner, :class_name => 'Map'
-  belongs_to :requester
+  belongs_to :tournament, :class_name => 'MashTournament'
+  belongs_to :round, :class_name => 'MashTournamentRound'
+
+  named_scope :unplayed, {
+    :conditions => %{
+        winner_id IS NULL
+        AND map_a_id IS NOT NULL
+        AND map_b_id IS NOT NULL
+    }
+  }
 end

rails/map-mash/app/models/mash_tournament.rb

@@ -1,2 +1,106 @@
 class MashTournament < ActiveRecord::Base
+  belongs_to :requester
+  has_many :mashes
+  has_many :rounds, :class_name => 'MashTournamentRound'
+  after_create :create_rounds
+  after_save :maybe_fill_in_next_round
+
+  def next_unplayed_mash
+    self.mashes.unplayed.first
+  end
+
+  def done?
+    true
+  end
+
+  def round(number = 0)
+    MashTournamentRound.find_by_mash_tournament_id(self.id,
+        :conditions => {:number => number}
+    )
+  end
+
+  private
+  def create_rounds
+    n_contenders = Map.count
+    while n_contenders % 4 != 0
+      n_contenders -= 1
+    end
+
+    round = 0
+
+    while n_contenders > 2
+      create_round(round, n_contenders)
+      n_contenders = n_contenders / 2
+      round += 1
+    end
+
+    assign_maps_for_round_zero
+    self.total_rounds = round - 1
+  end
+
+  def create_round(round_number, n_contenders)
+    round = MashTournamentRound.new(
+      :mash_tournament_id => self.id,
+      :number => round_number,
+      :mash_count => n_contenders / 2
+    )
+    round.save!
+
+    n_contenders.times do
+      Mash.new(
+        :mash_tournament_id => self.id,
+        :mash_tournament_round_id => round.id
+      ).save!
+    end
+  end
+
+  def maybe_fill_in_next_round
+    self.rounds.sort(&:number).each do |round|
+      if not round.done?
+        assign_maps_for_round(round)
+        return
+      end
+    end
+  end
+
+  def assign_maps_for_round(round)
+    previous = MashTournamentRound.find_by_mash_tournament_id_and_number(
+                  self.id, round.number - 1
+                )
+    previous_winners = previous.mashes.collect(&:winner_id)
+    pool = Map.all(
+      :order => 'RANDOM()',
+      :conditions => ['id in ?', previous_winners]
+    )
+
+    round.mashes.each do |mash|
+      mash.update_attributes(
+        :map_a_id => pool.pop.id,
+        :map_b_id => pool.pop.id
+      )
+    end
+  end
+
+  def assign_maps_for_round_zero
+    round = MashTournamentRound.for_round(self.id, 0)
+    pool = Map.all(
+      :order => 'RANDOM()',
+      :limit => round.mash_count * 2
+    )
+
+    logger.info("Populating mashes from pool: #{pool.inspect}")
+
+    round.mashes.each do |mash|
+      map_a = pool.pop
+      map_b = pool.pop
+      logger.info("Assigning `map_a` from #{map_a.inspect}, " +
+                  "`map_b` from #{map_b.inspect} to mash #{mash.inspect}")
+      logger.info("`map_a`.`id` = #{map_a.id}, `map_b`.`id` = #{map_b.id} ")
+
+      mash.update_attributes(
+        :map_a_id => map_a.id,
+        :map_b_id => map_b.id
+      )
+    end
+  end
 end

rails/map-mash/app/models/mash_tournament_round.rb

@@ -0,0 +1,8 @@
+class MashTournamentRound < ActiveRecord::Base
+  belongs_to :tournament, :class_name => 'MashTournament'
+  has_many :mashes
+
+  def self.for_round(tournament, round_number)
+    self.find_by_mash_tournament_id_and_number(tournament, round_number)
+  end
+end

rails/map-mash/app/models/requester.rb

@@ -1,3 +1,7 @@
 class Requester < ActiveRecord::Base
-  has_many :mashes
+  has_many :mash_tournaments
+
+  def current_tournament
+    self.mash_tournaments.last
+  end
 end

rails/map-mash/app/views/mash_tournaments/new.html.erb

@@ -1,11 +1,9 @@
-<h1>New mash_tournament</h1>
+<h1>New Map Mash tournament!</h1>
 
 <% form_for(@mash_tournament) do |f| %>
   <%= f.error_messages %>
 
   <p>
-    <%= f.submit 'Create' %>
+    <%= f.submit 'Start' %>
   </p>
 <% end %>
-
-<%= link_to 'Back', mash_tournaments_path %>

rails/map-mash/app/views/mash_tournaments/show.html.erb

@@ -1,3 +1,8 @@
+<ul>
+<% @mash_tournament.mashes.each do |mash| %>
+  <li><%= mash.map_a.name %> vs. <%= mash.map_b.name %>, winner = <%= mash.winner.name %></li>
+<% end %>
+</ul>
 
-<%= link_to 'Edit', edit_mash_tournament_path(@mash_tournament) %> |
-<%= link_to 'Back', mash_tournaments_path %>
+
+<%= link_to 'New!', :controller => 'mash_tournaments', :action => 'new' %>