350 lines
12 KiB
Ruby
350 lines
12 KiB
Ruby
|
||
class Course < ActiveRecord::Base
|
||
include Redmine::SafeAttributes
|
||
|
||
STATUS_ACTIVE = 1
|
||
STATUS_CLOSED = 5
|
||
STATUS_ARCHIVED = 9
|
||
|
||
attr_accessible :code, :extra, :name, :state, :tea_id, :time , :location, :state, :term, :password,:is_public,:description,:class_period, :open_student, :enterprise_name
|
||
#belongs_to :project, :class_name => 'Course', :foreign_key => :extra, primary_key: :identifier
|
||
belongs_to :teacher, :class_name => 'User', :foreign_key => :tea_id # 定义一个方法teacher，该方法通过tea_id来调用User表
|
||
belongs_to :school, :class_name => 'School', :foreign_key => :school_id #定义一个方法school，该方法通过school_id来调用School表
|
||
# has_many :bid
|
||
has_many :members, :include => [:principal, :roles], :conditions => "#{Principal.table_name}.type='User' AND #{Principal.table_name}.status=#{Principal::STATUS_ACTIVE}"
|
||
has_many :memberships, :class_name => 'Member'
|
||
has_many :member_principals, :class_name => 'Member',
|
||
:include => :principal,
|
||
:conditions => "#{Principal.table_name}.type='Group' OR (#{Principal.table_name}.type='User' AND #{Principal.table_name}.status=#{Principal::STATUS_ACTIVE})"
|
||
has_many :principals, :through => :member_principals, :source => :principal
|
||
has_many :users, :through => :members
|
||
has_many :org_courses
|
||
has_many :organizations, :through => :org_courses
|
||
# has_many :homeworks, :through => :homework_for_courses, :source => :bid, :dependent => :destroy
|
||
has_many :journals_for_messages, :as => :jour, :dependent => :destroy
|
||
# has_many :homework_for_courses, :dependent => :destroy
|
||
has_many :student, :class_name => 'StudentsForCourse', :source => :user
|
||
has_many :course_infos, :class_name => 'CourseInfos',:dependent => :destroy
|
||
has_many :enabled_modules, :dependent => :delete_all
|
||
has_many :boards, :dependent => :destroy, :order => "position ASC"
|
||
#has_many :course_journals_for_messages, :class_name => 'CourseJournalsForMessage', :as => :jour, :dependent => :destroy
|
||
has_many :news, :dependent => :destroy, :include => :author
|
||
has_one :course_status, :class_name => "CourseStatus", :dependent => :destroy
|
||
|
||
has_many :homework_commons, :dependent => :destroy
|
||
has_many :student_works, :through => :homework_commons, :dependent => :destroy
|
||
|
||
has_many :course_groups, :dependent => :destroy
|
||
# 课程动态
|
||
has_many :course_acts, :class_name => 'CourseActivity',:as =>:course_act ,:dependent => :destroy
|
||
|
||
has_many :course_activities
|
||
# 课程消息
|
||
has_many :course_messages, :class_name =>'CourseMessage', :as => :course_message, :dependent => :destroy
|
||
has_many :exercises, :dependent => :destroy
|
||
# 课程贡献榜
|
||
has_many :course_contributor_scores, :dependent => :destroy
|
||
|
||
acts_as_taggable
|
||
acts_as_nested_set :order => 'name', :dependent => :destroy
|
||
acts_as_attachable :view_permission => :view_course_files,
|
||
:delete_permission => :manage_files
|
||
|
||
validates_presence_of :password, :term,:name
|
||
validates_format_of :class_period, :with =>/^[1-9]\d*$/
|
||
validates_format_of :name,:with =>/^[^ ]+[a-zA-Z0-9_\u4e00-\u9fa5\s\S]+$/
|
||
validates_length_of :description, :maximum => 10000
|
||
before_save :self_validate
|
||
# 公开课程变成私有课程，所有资源都变成私有
|
||
after_update :update_files_public
|
||
after_create :create_board_sync, :act_as_course_activity, :act_as_course_message
|
||
before_destroy :delete_all_members
|
||
|
||
safe_attributes 'extra',
|
||
'time',
|
||
'name',
|
||
'extra',
|
||
'code',
|
||
'location',
|
||
'tea_id',
|
||
'password',
|
||
'term',
|
||
'is_public',
|
||
'description',
|
||
'class_period',
|
||
'open_student'
|
||
|
||
acts_as_customizable
|
||
|
||
scope :all_course
|
||
scope :active, lambda { where(:status => STATUS_ACTIVE) }
|
||
scope :status, lambda {|arg| where(arg.blank? ? nil : {:status => arg.to_i}) }
|
||
scope :all_public, lambda { where(:is_public => true) }
|
||
scope :visible, lambda {|*args| where(Course.visible_condition(args.shift || User.current, *args)) }
|
||
scope :allowed_to, lambda {|*args|
|
||
user = User.current
|
||
permission = nil
|
||
if args.first.is_a?(Symbol)
|
||
permission = args.shift
|
||
else
|
||
user = args.shift
|
||
permission = args.shift
|
||
end
|
||
where(Course.allowed_to_condition(user, permission, *args))
|
||
}
|
||
scope :like, lambda {|arg|
|
||
if arg.blank?
|
||
where(nil)
|
||
else
|
||
pattern = "%#{arg.to_s.strip.downcase}%"
|
||
where(" LOWER(name) LIKE :p ", :p => pattern)
|
||
end
|
||
}
|
||
|
||
def visible?(user=User.current)
|
||
user.allowed_to?(:view_course, self)
|
||
end
|
||
|
||
def parent_id_changed?
|
||
false
|
||
end
|
||
|
||
# Returns the mail adresses of users that should be always notified on project events
|
||
def recipients
|
||
notified_users.collect {|user| user.mail}
|
||
end
|
||
|
||
# Returns the users that should be notified on project events
|
||
def notified_users
|
||
# TODO: User part should be extracted to User#notify_about?
|
||
members.select {|m| m.principal.present? && (m.mail_notification? || m.principal.mail_notification == 'all')}.collect {|m| m.principal}
|
||
end
|
||
|
||
|
||
# 课程的短描述信息
|
||
def short_description(length = 255)
|
||
description.gsub(/<\/?.*?>/,"").html_safe if description
|
||
#description.gsub(/^(.{#{length}}[^\n\r]*).*$/m, '\1...').strip if description
|
||
end
|
||
|
||
# 课程的短名称信息
|
||
def short_name(length = 8)
|
||
name.gsub(/<\/?.*?>/,"").html_safe if name
|
||
end
|
||
|
||
def strip_html(html)
|
||
return html if html.empty? || !html.include?('<')
|
||
output = ""
|
||
tokenizer = HTML::Tokenizer.new(html)
|
||
while token = tokenizer.next
|
||
node = HTML::Node.parse(nil, 0, 0, token, false)
|
||
output += token unless (node.kind_of? HTML::Tag) or (token =~ /^<!/)
|
||
end
|
||
return output
|
||
end
|
||
|
||
def extra_frozen?
|
||
errors[:extra].blank? && !(new_record? || extra.blank?)
|
||
end
|
||
|
||
def archived?
|
||
self.status == STATUS_ARCHIVED
|
||
end
|
||
|
||
def self.visible_condition(user, options={})
|
||
allowed_to_condition(user, :view_course, options)
|
||
end
|
||
|
||
# 获取课程的资源类型列表
|
||
def attachmenttypes
|
||
@attachmenttypes = Attachmentstype.find(:all, :conditions => ["#{Attachmentstype.table_name}.typeId= ?",self.attachmenttype ])
|
||
end
|
||
|
||
|
||
# 获取资源后缀名列表
|
||
def contenttypes
|
||
attachmenttypes
|
||
if @attachmenttypes.length >0
|
||
@attachmenttypes.last().suffixArr
|
||
end
|
||
end
|
||
|
||
def active?
|
||
self.status == STATUS_ACTIVE
|
||
end
|
||
|
||
#课程权限判断
|
||
def allows_to?(action)
|
||
if archived?
|
||
# No action allowed on archived projects
|
||
return false
|
||
end
|
||
unless active? || Redmine::AccessControl.read_action?(action)
|
||
# No write action allowed on closed projects
|
||
return false
|
||
end
|
||
# No action allowed on disabled modules
|
||
if action.is_a? Hash
|
||
allowed_actions.include? "#{action[:controller]}/#{action[:action]}"
|
||
else
|
||
allowed_permissions.include? action
|
||
end
|
||
end
|
||
|
||
# 课程允许的权限集合
|
||
def allowed_permissions
|
||
@allowed_permissions ||= begin
|
||
module_names = enabled_modules.all(:select => :name).collect {|m| m.name}
|
||
Redmine::AccessControl.modules_permissions(module_names).collect {|p| p.name}
|
||
end
|
||
end
|
||
|
||
# 课程允许的动作集合
|
||
def allowed_actions
|
||
@actions_allowed ||= allowed_permissions.inject([]) { |actions, permission| actions += Redmine::AccessControl.allowed_actions(permission) }.flatten
|
||
end
|
||
|
||
# 返回用户组可以访问的课程
|
||
def users_by_role
|
||
members.includes(:user, :roles).all.inject({}) do |h, m|
|
||
m.roles.each do |r|
|
||
h[r] ||= []
|
||
h[r] << m.user
|
||
end
|
||
h
|
||
end
|
||
end
|
||
|
||
#自定义验证
|
||
def self_validate
|
||
|
||
end
|
||
|
||
def update_files_public
|
||
unless self.is_public?
|
||
self.attachments.each do |a|
|
||
a.update_attributes(:is_public => false)
|
||
end
|
||
end
|
||
end
|
||
|
||
# 创建课程讨论区
|
||
def create_board_sync
|
||
@board = self.boards.build
|
||
#self.name=" #{l(:label_borad_course) }"
|
||
@board.name = " #{l(:label_borad_course) }"#self.name
|
||
@board.description = self.name.to_s
|
||
@board.project_id = -1
|
||
if @board.save
|
||
logger.debug "[Course Model] ===> #{@board.to_json}"
|
||
else
|
||
logger.error "[Course Model] ===> Auto create board when course saved, because #{@board.full_messages}"
|
||
end
|
||
end
|
||
|
||
# 新增课程留言
|
||
# add by nwb
|
||
def self.add_new_jour(user, notes, id, options={})
|
||
course = Course.find(id)
|
||
if options.count == 0
|
||
pjfm = course.journals_for_messages.build(:user_id => user.id, :notes => notes, :reply_id => 0)
|
||
else
|
||
pjfm = course.journals_for_messages.build(options)
|
||
end
|
||
pjfm.save
|
||
pjfm
|
||
end
|
||
|
||
# 删除课程所有成员
|
||
def delete_all_members
|
||
if self.members && self.members.count > 0
|
||
me, mr = Member.table_name, MemberRole.table_name
|
||
connection.delete("DELETE FROM #{mr} WHERE #{mr}.member_id IN (SELECT #{me}.id FROM #{me} WHERE #{me}.course_id = #{id})")
|
||
Member.delete_all(['course_id = ?', id])
|
||
end
|
||
end
|
||
|
||
def get_endup_time
|
||
begin
|
||
end_time = Time.parse(self.endup_time)
|
||
rescue Exception => e
|
||
end_time = Time.parse("3000-01-01")
|
||
Rails.logger.error "[Error] course endup_time error. ===> #{e}"
|
||
ensure
|
||
return end_time
|
||
end
|
||
end
|
||
|
||
def get_time
|
||
begin
|
||
time = Date.new(self.time).to_time
|
||
rescue Exception => e
|
||
time = Time.parse("3000-01-01")
|
||
Rails.logger.error "[Error] course time error. ===> #{e}"
|
||
ensure
|
||
return time
|
||
end
|
||
end
|
||
|
||
def self.allowed_to_condition(user, permission, options={})
|
||
perm = Redmine::AccessControl.permission(permission)
|
||
base_statement = (perm && perm.read? ? "#{Course.table_name}.status <> #{Course::STATUS_ARCHIVED}" : "#{Course.table_name}.status = #{Course::STATUS_ACTIVE}")
|
||
if perm && perm.course_module
|
||
base_statement << " AND #{Course.table_name}.id IN (SELECT em.course_id FROM #{EnabledModule.table_name} em WHERE em.name='#{perm.course_module}')"
|
||
end
|
||
|
||
if options[:course]
|
||
course_statement = "#{Course.table_name}.id = #{options[:course].id}"
|
||
course_statement << " OR (#{Course.table_name}.lft > #{options[:course].lft} AND #{Course.table_name}.rgt < #{options[:course].rgt})" if options[:with_subcourses]
|
||
base_statement = "(#{course_statement}) AND (#{base_statement})"
|
||
end
|
||
|
||
if user.admin?
|
||
base_statement
|
||
else
|
||
statement_by_role = {}
|
||
unless options[:member]
|
||
role = user.logged? ? Role.non_member : Role.anonymous
|
||
if role.allowed_to?(permission)
|
||
statement_by_role[role] = "#{Course.table_name}.is_public = #{connection.quoted_true}"
|
||
end
|
||
end
|
||
if user.logged?
|
||
user.courses_by_role.each do |role, courses|
|
||
if role.allowed_to?(permission) && courses.any?
|
||
statement_by_role[role] = "#{Course.table_name}.id IN (#{courses.collect(&:id).join(',')})"
|
||
end
|
||
end
|
||
end
|
||
if statement_by_role.empty?
|
||
"1=0"
|
||
else
|
||
if block_given?
|
||
statement_by_role.each do |role, statement|
|
||
if s = yield(role, user)
|
||
statement_by_role[role] = "(#{statement} AND (#{s}))"
|
||
end
|
||
end
|
||
end
|
||
"((#{base_statement}) AND (#{statement_by_role.values.join(' OR ')}))"
|
||
end
|
||
end
|
||
end
|
||
|
||
#课程动态公共表记录
|
||
def act_as_course_activity
|
||
self.course_acts << CourseActivity.new(:user_id => self.tea_id,:course_id => self.id)
|
||
end
|
||
|
||
#创建课程后，给该用户发送消息
|
||
def act_as_course_message
|
||
self.course_messages << CourseMessage.new(:user_id => self.tea_id, :course_id => self.id, :viewed => false)
|
||
end
|
||
#项目与课程分离后，很多课程的名称等信息为空，这些数据信息存储在项目表中！！就是数据兼容的问题
|
||
#def name
|
||
# read_attribute('name') || Project.find_by_identifier(self.extra).try(:name)
|
||
#end
|
||
end
|
||
|
||
|