91 lines
3.3 KiB
Ruby
91 lines
3.3 KiB
Ruby
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# Groups organize the User.
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#
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# Group have the following attributes
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# * name
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# * description
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# * type (to specify, if it is a OrderGroup)
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# * role_admin, role_suppliers, role_article_eta, role_finance, role_orders
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# * weekly_task (if the group should do a job ervery week)
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# * weekday (on which weekday should the job be done? 1 means monday and so on)
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#
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# A Member gets the roles from the Group
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class Group < ActiveRecord::Base
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has_many :memberships, :dependent => :destroy
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has_many :users, :through => :memberships
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has_many :tasks
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# returns all non-finished tasks
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has_many :open_tasks, :class_name => 'Task', :conditions => ['done = ?', false], :order => 'due_date ASC'
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attr_accessible :name, :description, :role_admin, :role_suppliers, :role_article_meta, :role_finance, :role_orders,
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:weekly_task, :weekday, :task_name, :task_description, :task_required_users
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validates_length_of :name, :in => 1..25
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validates_uniqueness_of :name
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# messages
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ERR_LAST_ADMIN_GROUP_UPDATE = "Der letzten Gruppe mit Admin-Rechten darf die Admin-Rolle nicht entzogen werden"
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ERR_LAST_ADMIN_GROUP_DELETE = "Die letzte Gruppe mit Admin-Rechten darf nicht gelöscht werden"
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# Returns true if the given user if is an member of this group.
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def member?(user)
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memberships.find_by_user_id(user.id)
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end
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# Returns all NONmembers and a checks for possible multiple OrderGroup-Memberships
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def non_members
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nonMembers = Array.new
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for user in User.find(:all, :order => "nick")
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unless self.users.include?(user) || ( self.is_a?(OrderGroup) && user.find_ordergroup )
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nonMembers << user
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end
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end
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return nonMembers
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end
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# Check before destroy a group, if this is the last group with admin role
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def before_destroy
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raise ERR_LAST_ADMIN_GROUP_DELETE if self.role_admin == true && Group.find_all_by_role_admin(true).size == 1
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end
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# Returns an Array with date-objects to represent the next weekly-tasks
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def next_weekly_tasks(number = 8)
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# our system starts from 0 (sunday) to 6 (saturday)
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# get difference between groups weekday and now
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diff = self.weekday - Time.now.wday
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if diff >= 0
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# weektask is in current week
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nextTask = diff.day.from_now
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else
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# weektask is in the next week
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nextTask = (diff + 7).day.from_now
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end
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# now generate the Array
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nextTasks = Array.new
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number.times do
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nextTasks << nextTask
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nextTask = 1.week.from_now(nextTask)
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end
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return nextTasks
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end
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# get all groups, which are NOT OrderGroups
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#TODO: better implement a new model, which inherits from Group, e.g. WorkGroup
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def self.workgroups
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Group.find :all, :conditions => "type IS NULL"
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end
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protected
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# validates uniqueness of the Group.name. Checks groups and order_groups
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def validate
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errors.add(:name, "ist schon vergeben") if (group = Group.find_by_name(name) || group = OrderGroup.find_by_name(name)) && self != group
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end
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# add validation check on update
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def validate_on_update
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# error if this is the last group with admin role and role_admin should set to false
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errors.add(:role_admin, ERR_LAST_ADMIN_GROUP_UPDATE) if self.role_admin == false && Group.find_all_by_role_admin(true).size == 1 && self == Group.find(:first, :conditions => "role_admin = 1")
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end
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end
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