end
end
- def self.new_t sheet_id
- r = SheetPanel.max_t(sheet_id)
- r.blank? ? 0 : r.to_i + 1
- end
-
- def self.max_t sheet_id
- SheetPanel.maximum(:t, :conditions => ['sheet_id = ?', sheet_id])
- end
-
- def self.find_t sheet_id, t
- SheetPanel.find(:first, :conditions => ['sheet_id = ? and t = ?', sheet_id, t])
- end
-
- def self.collect_t sheet_panel
- r = SheetPanel.find(:all, :conditions => ['sheet_id = ?', sheet_panel.sheet_id], :order => 't')
- r.map {|sp| sp.t}
- end
-
- def self.serial? ary
- i = 0
- ary.compact.sort.each do |t|
- break false unless t == i
- i += 1
- end
- ary.compact.size == i
- end
-
- def self.validate_t sheet_panel
- SheetPanel.serial?(SheetPanel.collect_t(sheet_panel))
- end
-
- def insert_shift
- SheetPanel.update_all('t = t + 1', ['sheet_id = ? and t >= ?', self.sheet_id, self.t])
- end
-
- def lesser_shift old_t
- self.t = 0 if self.t < 0
- SheetPanel.update_all('t = t + 1', ['sheet_id = ? and (t >= ? and t < ?)', self.sheet_id, self.t, old_t])
- end
-
- def higher_shift old_t
- nf = SheetPanel.find_t(self.sheet_id, self.t)
- max_t = SheetPanel.max_t(self.sheet_id).to_i
- self.t = max_t if self.t > max_t
- SheetPanel.update_all('t = t - 1', ['sheet_id = ? and (t > ? and t <= ?)', self.sheet_id, old_t, self.t])
- end
-
- def update_shift old_t
- if self.t > old_t
- higher_shift old_t
- else
- lesser_shift old_t
- end
- end
-
- def rotate old_t = nil
- if self.new_record?
- if self.t.blank?
- self.t = SheetPanel.new_t self.sheet_id
- else
- self.insert_shift
- end
- else
- if self.t.blank?
- else
- self.update_shift old_t
- end
- end
- end
-
def allow? operators
return nil if self.sheet_id == nil or self.panel_id == nil
self.sheet.own?(operators) and self.panel.usable?(operators)
def store operators, old_t = nil
res = false
- SheetPanel.transaction do
+ self.class.transaction do
case self.allow? operators
when true
self.rotate old_t
end
res = self.save
raise ActiveRecord::Rollback unless res
- res = SheetPanel.validate_t(self)
+ res = self.class.validate_t(self.sheet_id)
unless res
self.errors.add :t, 'unserialized'
raise ActiveRecord::Rollback
res
end
- def destroy_and_shorten
- res = false
- SheetPanel.transaction do
- SheetPanel.update_all('t = t - 1', ['sheet_id = ? and (t > ?)', self.sheet_id, self.t])
- raise ActiveRecord::Rollback unless self.destroy
- res = true
- end
- res
- end
-
end