query model/controller added

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@79 e93f8b46-1217-0410-a6f0-8f06a7374b81

queries/trunk/app/models/query.rb

@@ -0,0 +1,123 @@
+class Query < ActiveRecord::Base
+  serialize :filters
+  
+  validates_presence_of :name
+    
+  @@operators = { "="   => "Egal", 
+                  "!"   => "Different",
+                  "o"   => "Ouvert",
+                  "c"   => "Ferme",
+                  "!*"  => "Aucun",
+                  "*"   => "Tous",
+                  "<t+" => "Dans moins de",
+                  ">t+" => "Dans plus de",
+                  "t+"  => "Dans exactement",
+                  "t"   => "Aujourd'hui",
+                  ">t-" => "Il y a moins de",
+                  "<t-" => "Il y a plus de",
+                  "t-"  => "Il y a exactement" }
+    
+  @@operators_by_filter_type = { :list => [ "=", "!" ],
+                                 :list_status => [ "o", "=", "!", "c" ],
+                                 :list_optional => [ "=", "!", "!*", "*" ],
+                                 :date => [ "<t+", ">t+", "t+", "t", ">t-", "<t-", "t-" ],
+                                 :date_past => [ ">t-", "<t-", "t-", "t" ] }
+  
+  @@available_filters = { "status_id" => { :type => :list_status, :order => 1,
+                                           :values => IssueStatus.find(:all).collect{|s| [s.name, s.id.to_s] } },       
+                          "tracker_id" => { :type => :list, :order => 2,
+                                            :values => Tracker.find(:all).collect{|s| [s.name, s.id.to_s] } },                                                                   
+                          "assigned_to_id" => { :type => :list_optional, :order => 3,
+                                                :values => User.find(:all).collect{|s| [s.display_name, s.id.to_s] } },                                                
+                          "priority_id" => { :type => :list, :order => 4,
+                                             :values => Enumeration.find(:all, :conditions => ['opt=?','IPRI']).collect{|s| [s.name, s.id.to_s] } },                        
+                          "created_on" => { :type => :date_past, :order => 5 },                        
+                          "updated_on" => { :type => :date_past, :order => 6 },
+                          "start_date" => { :type => :date, :order => 7 },
+                          "due_date" => { :type => :date, :order => 8 } }
+                          
+  cattr_accessor :available_filters
+
+  def initialize(attributes = nil)
+    super
+    self.filters ||= { 'status_id' => {:operator => "o"} }
+  end
+  
+  def validate
+    errors.add_to_base "Au moins un critere doit etre selectionne" unless filters && !filters.empty?
+    filters.each_key do |field|
+      errors.add field.gsub(/\_id$/, ""), "doit etre renseigne" unless 
+          # filter requires one or more values
+          (values_for(field) and !values_for(field).first.empty?) or 
+          # filter doesn't require any value
+          ["o", "c", "!*", "*", "t"].include? operator_for(field)
+    end if filters
+  end  
+  
+  def add_filter(field, operator, values)
+    # values must be an array
+    return unless values and values.is_a? Array
+    # check if field is defined as an available filter
+    if @@available_filters.has_key? field
+      filter_options = @@available_filters[field]
+      # check if operator is allowed for that filter
+      if @@operators_by_filter_type[filter_options[:type]].include? operator
+        filters[field] = {:operator => operator, :values => values }
+      end
+    end
+  end
+      
+  def has_filter?(field)
+    filters and filters[field]
+  end
+  
+  def operator_for(field)
+    has_filter?(field) ? filters[field][:operator] : nil
+  end
+  
+  def values_for(field)
+    has_filter?(field) ? filters[field][:values] : nil
+  end
+  
+  def statement
+    sql = "1=1" 
+    filters.each_key do |field|
+      sql = sql + " AND " unless sql.empty?      
+      v = values_for field      
+      case operator_for field
+      when "="
+        sql = sql + "issues.#{field} IN (" + v.each(&:to_i).join(",") + ")"
+      when "!"
+        sql = sql + "issues.#{field} NOT IN (" + v.each(&:to_i).join(",") + ")"
+      when "!*"
+        sql = sql + "issues.#{field} IS NULL"
+      when "*"
+        sql = sql + "issues.#{field} IS NOT NULL"
+      when "o"
+        sql = sql + "issue_statuses.is_closed=#{connection.quoted_false}" if field == "status_id"
+      when "c"
+        sql = sql + "issue_statuses.is_closed=#{connection.quoted_true}" if field == "status_id"
+      when ">t-"
+        sql = sql + "issues.#{field} >= '%s'" % connection.quoted_date(Date.today - v.first.to_i)
+      when "<t-"
+        sql = sql + "issues.#{field} <= '" + (Date.today - v.first.to_i).strftime("%Y-%m-%d") + "'"
+      when "t-"
+        sql = sql + "issues.#{field} = '" + (Date.today - v.first.to_i).strftime("%Y-%m-%d") + "'"
+      when ">t+"
+        sql = sql + "issues.#{field} >= '" + (Date.today + v.first.to_i).strftime("%Y-%m-%d") + "'"
+      when "<t+"
+        sql = sql + "issues.#{field} <= '" + (Date.today + v.first.to_i).strftime("%Y-%m-%d") + "'"
+      when "t+"
+        sql = sql + "issues.#{field} = '" + (Date.today + v.first.to_i).strftime("%Y-%m-%d") + "'"
+      when "t"
+        sql = sql + "issues.#{field} = '%s'" % connection.quoted_date(Date.today)
+      end
+    end if filters
+    sql
+  end
+
+  def self.operators_for_select(filter_type)
+    @@operators_by_filter_type[filter_type].collect {|o| [@@operators[o], o]}
+  end
+ 
+end