金课调整

app/controllers/subjects_controller.rb

@@ -415,6 +415,20 @@ class SubjectsController < ApplicationController
                                   order by ue_count desc limit 10")
   end
 
+  # 预约报名
+  def appointment
+    tip_exception("还存在未结束的课堂") unless @subject.max_course_end_date.nil? || @subject.max_course_end_date < Date.today
+    tip_exception("无需重复报名") if @subject.subject_appointments.exists?(user_id: current_user.id)
+    ActiveRecord::Base.transaction do
+      @subject.subject_appointments << SubjectAppointment.new(user_id: current_user.id)
+      @subject.increment!(:participant_count)
+      if @subject.participant_count == @subject.student_count
+        @subject.start_course_notify
+      end
+      normal_status("预约成功")
+    end
+  end
+
   private
   def subject_params
     tip_exception("实训路径名称不能为空") if params[:name].blank?

app/decorators/tiding_decorator.rb

@@ -384,4 +384,8 @@ module TidingDecorator
   def public_course_start_content
     I18n.t(locale_format) % [belong_container&.name, belong_container&.start_date&.strftime("%Y-%m-%d")]
   end
+
+  def subject_start_course_content
+    I18n.t(locale_format) % belong_container&.name
+  end
 end

app/models/subject.rb

@@ -13,6 +13,8 @@ class Subject < ApplicationRecord
   has_many :stage_shixuns, dependent: :destroy
   has_many :shixuns, through: :stage_shixuns
 
+  has_many :subject_appointments, dependent: :destroy
+
   has_many :subject_members, ->{ order("subject_members.position asc")}, dependent: :destroy
   has_many :users, through: :subject_members
   has_many :tidings, as: :container, dependent: :destroy
@@ -109,4 +111,10 @@ class Subject < ApplicationRecord
   def learning? user_id
     Myshixun.where(user_id: user_id, shixun_id: shixuns).exists?
   end
+
+  def start_course_notify
+    Tiding.create(user_id: user_id, trigger_user_id: 0, container_id: id,
+                   container_type: 'SubjectStartCourse', belong_container_id: id,
+                   belong_container_type: 'Subject', tiding_type: 'System')
+  end
 end

app/models/subject_appointment.rb

@@ -0,0 +1,4 @@
+class SubjectAppointment < ApplicationRecord
+  belongs_to :subject
+  belongs_to :user
+end

app/views/subjects/show.json.jbuilder

@@ -24,4 +24,9 @@ if @subject.excellent
     json.course_identity @user.course_identity(course)
     json.course_status subject_course_status course
   end
+
+  if @subject.max_course_end_date.nil? || @subject.max_course_end_date < Date.today
+    json.student_count @subject.student_count
+    json.participant_count @subject.participant_count
+  end
 end

config/locales/tidings/zh-CN.yml

@@ -227,3 +227,4 @@
         1_end: "你提交的发布视频申请：%s，审核已通过"
         2_end: "你提交的发布视频申请：%s，审核未通过<br/><span>原因：%{reason}</span>"
     PublicCourseStart_end: "你报名参与的开放课程：%s，将于%s正式开课"
+    SubjectStartCourse_end: "您创建的开放课程：%s 已达到开课人数要求。您可以在24小时内自主开设新一期课程。如果超过24小时未开课，平台将自动开课并复制您上一期的课程内容。"

config/routes.rb

@@ -284,6 +284,7 @@ Rails.application.routes.draw do
         post :up_member_position
         post :down_member_position
         get :right_banner
+        post :appointment
       end
 
       collection do

db/migrate/20190921010411_add_course_member_to_subjects.rb

@@ -0,0 +1,6 @@
+class AddCourseMemberToSubjects < ActiveRecord::Migration[5.2]
+  def change
+    add_column :subjects, :student_count, :integer, :default => 0
+    add_column :subjects, :participant_count, :integer, :default => 0
+  end
+end

db/migrate/20190921015840_create_subject_appointments.rb

@@ -0,0 +1,10 @@
+class CreateSubjectAppointments < ActiveRecord::Migration[5.2]
+  def change
+    create_table :subject_appointments do |t|
+      t.references :subject, index: true
+      t.references :user, index: true
+
+      t.timestamps
+    end
+  end
+end

spec/models/subject_appointment_spec.rb

@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe SubjectAppointment, type: :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+end