socialforge/app/services/courses_service.rb

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#coding=utf-8
class CoursesService
include ApplicationHelper
include CoursesHelper
include HomeworkAttachHelper
include ApiHelper
#参数school_id为0或不传时返回所有课程否则返回对应学校的课程
#参数per_page_count分页功能每页显示的课程数
#参数page分页功能当前页码
def course_list params,current_user
@school_id = params[:school_id]
per_page_option = params[:per_page_count] || 10
page_no = params[:page] || 1
if @school_id == "0" || @school_id.nil?
@courses_all = Course.active.visible.
joins("LEFT JOIN #{CourseStatus.table_name} ON #{Course.table_name}.id = #{CourseStatus.table_name}.course_id")
else
@courses_all = Course.active.visible.
joins("LEFT JOIN #{CourseStatus.table_name} ON #{Course.table_name}.id = #{CourseStatus.table_name}.course_id").
where("#{Course.table_name}.school_id = ?", @school_id)
end
@course_count = @courses_all.count
@course_pages = Redmine::Pagination::Paginator.new @course_count, per_page_option,page_no
@courses = @courses_all.order("created_at desc")
@courses = @courses.offset(@course_pages.offset).limit(@course_pages.per_page)
course_list = []
@courses.each do |course|
course_list << {:course => course,:img_url => url_to_avatar(course),:current_user_is_member => current_user.member_of_course?(course),:current_user_is_teacher => is_course_teacher(current_user,course)}
end
course_list
end
#搜索课程
def search_course params,current_user
courses_all = Course.all_course
name = params[:name]
if name.blank?
raise 'sumbit empty'
end
@courses = courses_all.visible
if params[:name].present?
@courses_all = @courses.like(params[:name])
else
@courses_all = @courses;
end
@courses_all
course_list = []
@courses_all.each do |course|
course_list << {:course => course,:img_url => url_to_avatar(course),:current_user_is_member => current_user.member_of_course?(course),:current_user_is_teacher => is_course_teacher(current_user,course)}
end
course_list
end
#获取头像
def get_img obj
url_to_avatar(obj)
end
#课程老师或课程学生列表
def course_teacher_or_student_list params,course,current_user
if course.is_a?(Course)
c = course
else
c = Course.find(course)
end
if current_user.nil? || !(current_user.admin? || c.is_public == 1 || (c.is_public == 0 && current_user.member_of_course?(c)))
raise '403'
end
@teachers= searchTeacherAndAssistant(c)
#@canShowCode = isCourseTeacher(User.current.id,course) && params[:role] != '1'
case params[:role]
when '1'
#@subPage_title = l :label_teacher_list
@members = searchTeacherAndAssistant(c)
when '2'
#@subPage_title = l :label_student_list
@members = searchStudent(c)
else
#@subPage_title = ''
@members = c.member_principals.includes(:roles, :principal).all.sort
end
users = []
@members.each do |m|
img_url = url_to_avatar(m.user)
gender = m.user.user_extensions.gender.nil? ? 0 : m.user.user_extensions.gender
work_unit = get_user_work_unit m.user
location = get_user_location m.user
users << {:id => m.user.id, :img_url => img_url, :nickname => m.user.login, :gender => gender, :work_unit => work_unit, :mail => m.user.mail, :location => location, :brief_introduction => m.user.user_extensions.brief_introduction}
end
users
end
#获取用户的工作单位
def get_user_work_unit user
work_unit = ""
if user.user_extensions.identity == 0 || user.user_extensions.identity == 1
work_unit = user.user_extensions.school.name unless user.user_extensions.school.nil?
elsif user.user_extensions.identity == 3
work_unit = user.user_extensions.occupation
elsif user.user_extensions.identity == 2
work_unit = user.firstname
end
work_unit
end
#获取用户地区
def get_user_location user
location = ""
location << (user.user_extensions.location || '')
location << (user.user_extensions.location_city || '')
location
end
#课程通知列表
def course_news_list params,current_user
if params[:course_id] && @course==nil
@course = Course.find(params[:course_id])
end
if current_user.nil? || !(current_user.admin? || @course.is_public == 1 || (@course.is_public == 0 && current_user.member_of_course?(@course)))
raise '403'
end
scope = @course ? @course.news.course_visible(current_user) : News.course_visible(current_user)
news = []
scope.each do |n|
news << {:id => n.id,:title => n.title,:author_name => n.author.name,:author_id => n.author.id, :description => n.description,:created_on => format_time(n.created_on),:comments_count => n.comments_count}
end
news
end
#查看新闻权限验证
def show_course_news_authorize(current_user)
unless current_user.allowed_to?({:controller => 'news', :action => 'show'}, false)
raise '403'
end
end
#显示课程通知(包括评论) 需验证权限
def show_course_news params,current_user
@news = News.find(params[:id])
@course = @news.course
if @course
if current_user.nil? || !(current_user.admin? || @course.is_public == 1 || (@course.is_public == 0 && current_user.member_of_course?(@course)))
raise '403'
end
end
@comments = @news.comments
@comments.reverse! if current_user.wants_comments_in_reverse_order?
{:news => @news,:comments => @comments}
#comments = []
#@comments.each do |comment|
# comments << {:author_id => comment.author_id,:author_name => comment.author.name,:commont_content => comment.comments,:time => format_time(comment.created_on)}
#end
#{:title => @news.title,:author_name => @news.author.name,:author_id => @news.author.id, :description => @news.description,:created_on => format_time(@news.created_on),
# :comments_count => @news.comments_count,:comments => comments}
end
#显示课程
def show_course(params,current_user)
course = Course.find(params[:id])
unless (course.is_public == 1 || current_user.member_of_course?(course) || current_user.admin?)
raise '403'
end
{:course => course,:img_url => url_to_avatar(course),:current_user_is_member => current_user.member_of_course?(course),:current_user_is_teacher => is_course_teacher(current_user,course)}
end
#创建课程
#current_user当前用户对象不是id
# params[:course][:name]:课程名称
#params[:course][:password]:密码
#params[:course][:description]:描述
#params[:course][:is_public]:是否公开1公开0私有
#params[:course][:open_student]:是否公开学生列表1公开0不公开不公开时非课程成员无法看到学生列表
#params[:course][:course_type]:暂时默认给1值。
#params[:term]:学期(秋季学期或春季学期)
#params[:time]: 年份2014
#params[:setup_time]:暂不传(貌似已经没用了)
#params[:endup_time]: 暂不传(貌似已经没用了)
#params[:class_period]:学时总数
def create_course(params,current_user)
if current_user.user_extensions.identity
@course = Course.new
@course.extra = 'course' + DateTime.parse(Time.now.to_s).strftime('%Y-%m-%d_%H-%M-%S').to_s
@course.send(:safe_attributes=, params[:course], current_user)
#@course.safe_attributes(current_user,params[:course])
@course.tea_id = current_user.id
@course.term = params[:term]
@course.time = params[:time]
#@course.school_id = params[:occupation]
@course.school_id = current_user.user_extensions.school_id
@course.setup_time = params[:setup_time]
@course.endup_time = params[:endup_time]
@course.class_period = params[:class_period]
end
@issue_custom_fields = IssueCustomField.sorted.all
@trackers = Tracker.sorted.all
if @course.save
#unless User.current.admin?
r = Role.givable.find_by_id(Setting.new_project_user_role_id.to_i) || Role.givable.first
m = Member.new(:user => current_user, :roles => [r])
m.project_id = -1
course = CourseInfos.new(:user_id => current_user.id, :course_id => @course.id)
#user_grades = UserGrade.create(:user_id => User.current.id, :course_id => @course.id)
if params[:course][:is_public] == '1'
course_status = CourseStatus.create(:course_id => @course.id, :watchers_count => 0, :changesets_count => 0, :grade => 0, :course_type => @course_tag)
end
@course.members << m
@course.course_infos << course
end
{:course => @course,:img_url => url_to_avatar(@course),:current_user_is_member => current_user.member_of_course?(@course),:current_user_is_teacher => is_course_teacher(current_user,@course)}
end
#验证编辑课程的权限
#当前
def edit_course_authorize(current_user,course)
unless current_user.allowed_to?({:controller => 'courses', :action => 'update'}, course)
raise '403'
end
end
#编辑课程 需验证权限
# params[:course][:name]:课程名称
#params[:course][:password]:密码
#params[:course][:description]:描述
#params[:course][:is_public]:是否公开1公开0私有
#params[:course][:open_student]:是否公开学生列表1公开0不公开不公开时非课程成员无法看到学生列表
#params[:course][:course_type]:暂时默认给1值。
#params[:term]:学期(秋季学期或春季学期)
#params[:time]: 年份2014
#params[:class_period]:学时总数
def edit_course(params,course,current_user)
course.send(:safe_attributes=, params[:course], current_user)
#course.safe_attributes = params[:course]
course.time = params[:time]
course.term = params[:term]
course.class_period = params[:class_period]
if course.save
if params[:course][:is_public] == '0'
course_status = CourseStatus.find_by_course_id(course.id)
course_status.destroy if course_status
elsif params[:course][:is_public] == '1'
course_status = CourseStatus.find_by_course_id(course.id)
course_status.destroy if course_status
course_status = CourseStatus.create(:course_id => course.id, :grade => 0)
end
end
{:course => course,:img_url => url_to_avatar(course),:current_user_is_member => current_user.member_of_course?(course),:current_user_is_teacher => is_course_teacher(current_user,course)}
end
#退出课程
#object_id: 课程id
#user当前用户
#@state == 0 退出成功
#@state == 1 不在课程中
#@state == 2 您还未登录
#@state 其他 未知错误,请稍后再试
def exit_course params,user
if user.nil?
@state = 2
return @state
end
@member = Member.where('course_id = ? and user_id = ?', params[:object_id], user.id)
if @member.nil? || @member.count == 0
@state = 1
return @state
end
@member.first.destroy
joined = StudentsForCourse.where('student_id = ? and course_id = ?', user.id, params[:object_id])
joined.each do |join|
join.delete
@state = 0
end
@state
end
#加入课程
#object_id课程id
#course_password :加入课程的密码
#@state == 0 加入成功
#@state == 1 密码错误
#@state == 2 课程已过期 请联系课程管理员重启课程。(在配置课程处)
#@state == 3 您已经加入了课程
#@state == 4 您加入的课程不存在
#@state == 5 您还未登录
#@state 其他 未知错误,请稍后再试
def join_course params,current_user
course = Course.find_by_id params[:object_id]
@state = 10
if course
if course_endTime_timeout? course
@state = 2
else
if current_user.member_of_course?(course)
@state = 3
else
if params[:course_password] == course.password
members = []
members << Member.new(:role_ids => [10], :user_id => current_user.id)
course.members << members
StudentsForCourse.create(:student_id => current_user.id, :course_id => params[:object_id])
@state = 0
else
@state = 1
end
end
end
else
@state = 4
end
{:state => @state,:course => course}
end
#作业列表
#已提交的作业数量获取 bid.homeworks.count
#学生提问数量获取 bid.commit.nil? ? 0 : bid.commit
def homework_list params,current_user
course = Course.find(params[:id])
if course.is_public != 0 || current_user.member_of_course?(course)
bids = course.homeworks.order('deadline DESC')
bids = bids.like(params[:name]) if params[:name].present?
homeworks = []
bids.each do |bid|
homeworks << show_homework_info(course,bid,current_user,is_course_teacher(current_user,course))
end
homeworks
else
raise '403'
end
end
def course_dynamic(params,current_user)
@user = User.find(params[:id])
if !current_user.admin? && !@user.active?
raise '404'
return
end
if current_user == @user || current_user.admin?
membership = @user.coursememberships.all
else
membership = @user.coursememberships.all(:conditions => Course.visible_condition(current_user))
end
if membership.nil? || membership.count == 0
raise l(:label_no_courses,:locale => current_user.language.nil? ? 'zh':current_user.language)
end
membership.sort! {|older, newer| newer.created_on <=> older.created_on }
result = []
membership.each do |mp|
course = mp.course
latest_course_dynamics = []
latest_news = course.news.order("created_on desc").first
unless latest_news.nil?
latest_course_dynamics << {:type => 1,:time => latest_news.created_on,:message => l(:label_recently_updated_notification,:locale => current_user.language.nil? ? 'zh':current_user.language)}
end
latest_message = course.journals_for_messages.order("created_on desc").first
unless latest_message.nil?
latest_course_dynamics << {:type => 2,:time => latest_message.created_on,:message => l(:label_recently_updated_message,:locale => current_user.language.nil? ? 'zh':current_user.language)}
end
latest_attachment = course.attachments.order("created_on desc").first
unless latest_attachment.nil?
latest_course_dynamics << {:type => 3,:time => latest_attachment.created_on,:message => l(:label_recently_updated_courseware,:locale => current_user.language.nil? ? 'zh':current_user.language)}
end
latest_bid = course.homeworks.order('updated_on DESC').first
unless latest_bid.nil?
latest_course_dynamics << {:type => 4,:time => latest_bid.updated_on,:message => l(:label_recently_updated_homework,:locale => current_user.language.nil? ? 'zh':current_user.language)}
end
#每个作业中的最新留言
messages = []
course.homeworks.each do |bid|
jour = bid.journals_for_messages.order("created_on desc").first
unless jour.nil?
messages << jour
end
end
unless messages.count == 0
messages.sort!{|order,newer| newer.created_on <=> order.created_on}
end
latest_bid_message = messages.first
unless latest_bid_message.nil?
latest_course_dynamics << {:type => 4,:time => latest_bid_message.created_on,:message => l(:label_recently_updated_message,:locale => current_user.language.nil? ? 'zh':current_user.language)}
end
#每个作业中学生最后提交的作业
homeworks = []
course.homeworks.each do |bid|
homework_attach = bid.homeworks.order('updated_at DESC').first
unless homework_attach.nil?
homeworks << homework_attach
end
end
unless homeworks.count == 0
homeworks.sort!{|order,newer| newer.updated_at <=> order.updated_at}
end
latest_homework_attach = homeworks.first
unless latest_homework_attach.nil?
latest_course_dynamics << {:type => 4,:time => latest_homework_attach.updated_at,:message => l(:label_recently_updated_homework,:locale => current_user.language.nil? ? 'zh':current_user.language)}
end
latest_course_dynamics.sort!{|order,newer| newer[:time] <=> order[:time]}
latest_course_dynamic = latest_course_dynamics.first
unless latest_course_dynamic.nil?
result << {:course_name => course.name,:course_id => course.id,:course_img_url => url_to_avatar(course),:type => latest_course_dynamic[:type],:update_time => latest_course_dynamic[:time],:message => latest_course_dynamic[:message],:count => nil}
end
end
result.sort!{|order,newer| newer[:update_time] <=> order[:update_time]}
result
end
private
def show_homework_info course,bid,current_user,is_course_teacher
author_real_name = bid.author.lastname + bid.author.firstname
many_times = course.homeworks.index(bid) + 1
name = bid.name
homework_count = bid.homeworks.count #已提交的作业数量
student_questions_count = bid.commit.nil? ? 0 : bid.commit
description = bid.description
#if is_course_teacher(User.current, course) && @bid.open_anonymous_evaluation == 1 && @bid.homeworks.count >= 2
state = bid.comment_status
unless is_course_teacher
homework_for_anonymous_comments = get_student_batch_homework_list bid,current_user
end
#end
open_anonymous_evaluation = bid.open_anonymous_evaluation
{:course_name => course.name,:course_id => course.id,:id => bid.id, :author => bid.author,:author_real_name => author_real_name, :homework_times => many_times, :homework_name => name, :homework_count => homework_count,:student_questions_count => student_questions_count,
:description => description, :homework_state => state,:open_anonymous_evaluation => open_anonymous_evaluation,:homework_for_anonymous_comments => homework_for_anonymous_comments,:created_on => bid.created_on,:deadline => bid.deadline}
end
#显示作业列表的同时显示分配给当前学生匿评的作业
def show_homework_info_with_batch course,bid
author = bid.author.lastname + bid.author.firstname
many_times = course.homeworks.index(bid) + 1
name = bid.name
homework_count = bid.homeworks.count #已提交的作业数量
student_questions_count = bid.commit.nil? ? 0 : bid.commit
description = bid.description
#if is_course_teacher(User.current, course) && @bid.open_anonymous_evaluation == 1 && @bid.homeworks.count >= 2
state = bid.comment_status
#end
open_anonymous_evaluation = bid.open_anonymous_evaluation
{:course_name => course.name,:id => bid.id, :course_teacher => author, :homework_times => many_times, :homework_name => name, :homework_count => homework_count,:student_questions_count => student_questions_count,
:description => description, :homework_state => state,:open_anonymous_evaluation => open_anonymous_evaluation}
end
end