Add signup limit feature.

app/controllers/seminars_controller.rb

@@ -28,6 +28,7 @@ class SeminarsController < ApplicationController
       registration_is_open = seminar.registration_status.present?
       sign_up_not_yet = seminar.signup_start_date && @time_now && @seminar.signup_start_date > @time_now
       sign_up_overdue = seminar.signup_end_date && @time_now && (@seminar.signup_end_date + 1.day <= @time_now)
+      signup_is_full = seminar.signup_is_full?
       seminar_url = (@custom_slug ? OrbitHelper.url_to_show(@custom_slug) : OrbitHelper.url_to_show(seminar.to_param))
       if !registration_is_open
         sign_up = t('seminar.sign_up_not_open')
@@ -35,6 +36,8 @@ class SeminarsController < ApplicationController
         sign_up = t('seminar.sign_up_not_yet')
       elsif sign_up_overdue
         sign_up = t('seminar.sign_up_overdue')
+      elsif signup_is_full
+        sign_up = t('seminar.sign_up_is_full')
       else
         sign_up_text = t('seminar.signup')
         sign_up = link_to(sign_up_text, seminar.get_frontend_url(link_url), :target=>'_blank', :title=>sign_up_text)
@@ -329,6 +332,7 @@ class SeminarsController < ApplicationController
     registration_is_open = seminar.registration_status.present?
     sign_up_not_yet = seminar.signup_start_date && @time_now && @seminar.signup_start_date > @time_now
     sign_up_overdue = seminar.signup_end_date && @time_now && (@seminar.signup_end_date + 1.day <= @time_now)
+    signup_is_full = seminar.signup_is_full?
     seminar_url = (@custom_slug ? OrbitHelper.url_to_show(@custom_slug) : OrbitHelper.url_to_show(seminar.to_param))
     if !registration_is_open
       sign_up = t('seminar.sign_up_not_open')
@@ -336,6 +340,8 @@ class SeminarsController < ApplicationController
       sign_up = t('seminar.sign_up_not_yet')
     elsif sign_up_overdue
       sign_up = t('seminar.sign_up_overdue')
+    elsif signup_is_full
+      sign_up = t('seminar.sign_up_is_full')
     else
       sign_up_text = t('seminar.signup')
       sign_up = link_to(sign_up_text, seminar.get_frontend_url(seminar_url), :target=>'_blank', :title=>sign_up_text)
@@ -424,6 +430,36 @@ class SeminarsController < ApplicationController
       redirect_to referer_url, :notice => notice_words
       return
     end
+    signup_limit = @seminar.signup_limit
+    has_counter = false
+    if signup_limit
+      if defined?(OrbitHelper::SharedMutex)
+        OrbitHelper::SharedMutex.synchronize do
+          signup_count = OrbitHelper::SharedHash['seminar'][:counter][seminar_id]
+          if signup_count.nil?
+            signup_count = SeminarSignup.where(:seminar_main_id=>@seminar.id).count
+            OrbitHelper::SharedHash['seminar'][:counter][seminar_id] = signup_count
+          end
+          if signup_limit > signup_count
+            OrbitHelper::SharedHash['seminar'][:counter][seminar_id] = signup_count + 1
+            has_counter = true
+          else
+            notice_words = t('seminar.sign_up_is_full')
+            referer_url = get_referer_url_for_notice(notice_words)
+            redirect_to referer_url, :notice => notice_words
+            return
+          end
+        end
+      else
+        signup_count = SeminarSignup.where(:seminar_main_id=>@seminar.id).count
+        if signup_limit <= signup_count
+          notice_words = t('seminar.sign_up_is_full')
+          referer_url = get_referer_url_for_notice(notice_words)
+          redirect_to referer_url, :notice => notice_words
+          return
+        end
+      end
+    end
     @signup = SeminarSignup.where(email: params[:seminar_signup][:email], seminar_main_id: seminar_id ).first
 
     @seminar_signup = SeminarSignup.new(seminar_signup_params)
@@ -463,6 +499,11 @@ class SeminarsController < ApplicationController
       end
       redirect_to "#{params[:referer_url].to_s.chomp('/').gsub(/\/([^\/?#]+)(|[^\/]+)$/){|f| '/'+$1}}?method=signup_ok#{status_param}&serial_number=#{@seminar_signup.display_serial_number}"
     else
+      if has_counter
+        OrbitHelper::SharedMutex.synchronize do
+          OrbitHelper::SharedHash['seminar'][:counter][seminar_id] = OrbitHelper::SharedHash['seminar'][:counter][seminar_id] - 1
+        end
+      end
       if !not_signup_yet
         notice_words = t('seminar.email_exist')
         referer_url = get_referer_url_for_notice(notice_words)

app/models/seminar_main.rb

@@ -51,6 +51,9 @@ class SeminarMain
   field :last_serial_number, :type => Integer, :default => 0
   field :assign_mode, :type => Integer, :default => 0 # 0 => 用default signup ids來分配 ,1 => 用final_session來分配, 2 => 用final_session來分配(當有preffered session欄位時)
   field :update_old_flag, :type => Boolean, :default => false
+
+  field :signup_limit, :type => Integer, :default => nil
+
   belongs_to :seminar_item
   belongs_to :organizer , :class_name=>"MemberProfile", :foreign_key => :organizer_id
   has_many :seminar_sessions, :autosave => true, :dependent => :destroy
@@ -80,6 +83,12 @@ class SeminarMain
   accepts_nested_attributes_for :seminar_signup_field_customs, :allow_destroy => true
   accepts_nested_attributes_for :seminar_template_setting, :allow_destroy => true
   before_save do
+    if self.signup_limit == 0
+      self.signup_limit = nil
+    end
+    if self.signup_limit_changed?
+      self.sync_signup_count
+    end
     module_app_key = "seminar"
     add_module_app_member_ids = []
     remove_module_app_member_ids = []
@@ -257,6 +266,37 @@ class SeminarMain
     self.enable_recaptcha = (self.seminar_signup_field_sets.where(:field_name=>'recaptcha', :disabled.ne=>true).count != 0)
     self.save
   end
+  def sync_signup_count
+    if defined?(OrbitHelper::SharedMutex)
+      seminar_id =self.id.to_s
+      OrbitHelper::SharedMutex.synchronize do
+        if self.signup_limit.nil?
+          OrbitHelper::SharedHash['seminar'][:counter][seminar_id] = nil
+        else
+          signup_count = SeminarSignup.where(:seminar_main_id=>self.id).count
+          OrbitHelper::SharedHash['seminar'][:counter][seminar_id] = signup_count
+        end
+      end
+    end
+  end
+  def signup_is_full?
+    tmp_signup_limit = self.signup_limit
+    return false if tmp_signup_limit.nil?
+    if defined?(OrbitHelper::SharedMutex)
+      seminar_id =self.id.to_s
+      signup_count = 0
+      OrbitHelper::SharedMutex.synchronize do
+        signup_count = OrbitHelper::SharedHash['seminar'][:counter][seminar_id]
+        if signup_count.nil?
+          signup_count = SeminarSignup.where(:seminar_main_id=>self.id).count
+          OrbitHelper::SharedHash['seminar'][:counter][seminar_id] = signup_count
+        end
+      end
+    else
+      signup_count = SeminarSignup.where(:seminar_main_id=>self.id).count
+    end
+    return (tmp_signup_limit <= signup_count)
+  end
   def self.time_range(date1 = null, date2 = null)
 
     if !date1.blank?

app/models/seminar_signup.rb

@@ -30,7 +30,18 @@ class SeminarSignup
   accepts_nested_attributes_for :seminar_signup_values, allow_destroy: true
   accepts_nested_attributes_for :seminar_signup_contributes, allow_destroy: true
   scope :sort_ordered, ->{ order_by(:sort_number=>1,:created_at=>1) }
-
+  after_destroy do
+    if defined?(OrbitHelper::SharedMutex)
+      OrbitHelper::SharedMutex.synchronize do
+        seminar_id = self.seminar_main_id.to_s
+        signup_count = OrbitHelper::SharedHash['seminar'][:counter][seminar_id]
+        if signup_count
+          signup_count -= 1
+          OrbitHelper::SharedHash['seminar'][:counter][seminar_id] = signup_count
+        end
+      end
+    end
+  end
   before_create do
     unit = self.unit_translations.values.select{|v| v.present?}.first
     tmp_unit_translations = self.unit_translations

app/views/admin/seminars/_form.html.erb

@@ -112,6 +112,13 @@
         </div>
       </div>
 
+      <div class="control-group">
+        <label class="control-label muted"><%= t('seminar.signup_limit') %></label>
+        <div class="controls">
+          <%= f.number_field :signup_limit, placeholder: t('seminar.blank_no_limit') %>
+        </div>
+      </div>
+
       <!-- Contribute Date Time Picker -->
       <div class="control-group">
         <label class="control-label muted"><%= t('seminar.contribute_start_date') %></label>

app/views/seminars/index.html.erb

@@ -26,6 +26,7 @@
 				registration_is_open = seminar.registration_status.present?
 				sign_up_not_yet = seminar.signup_start_date && @time_now && seminar.signup_start_date > @time_now
 				sign_up_overdue = seminar.signup_end_date && @time_now && (seminar.signup_end_date + 1.day <= @time_now)
+				signup_is_full = seminar.signup_is_full?
 				seminar_url = OrbitHelper.url_to_show(seminar.to_param)
 				if !registration_is_open
 					sign_up = t('seminar.sign_up_not_open')
@@ -33,6 +34,8 @@
 					sign_up = t('seminar.sign_up_not_yet')
 				elsif sign_up_overdue
 					sign_up = t('seminar.sign_up_overdue')
+				elsif signup_is_full
+					sign_up = t('seminar.sign_up_is_full')
 				else
 					sign_up_text = t('seminar.signup')
 					sign_up = link_to(sign_up_text, seminar.get_frontend_url(seminar_url), :target=>'_blank', :title=>sign_up_text)

app/views/seminars/show.html.erb

@@ -12,6 +12,7 @@
   registration_is_open = @seminar.registration_status.present?
   sign_up_not_yet = @seminar.signup_start_date && @time_now && @seminar.signup_start_date > @time_now
   sign_up_overdue = @seminar.signup_end_date && @time_now && (@seminar.signup_end_date + 1.day <= @time_now)
+  signup_is_full = @seminar.signup_is_full?
 %>
 <% if !registration_is_open %>
 
@@ -24,6 +25,11 @@
 <% elsif sign_up_overdue %>
 
 <%= t('seminar.sign_up_overdue') %>
+
+<% elsif signup_is_full %>
+
+<%= t('seminar.sign_up_is_full') %>
+
 <% else %>
   <%#= stylesheet_link_tag "lib/main-forms" %>
   <%= stylesheet_link_tag "basic/bootstrap-datetimepicker" %>

config/locales/en.yml

@@ -27,6 +27,7 @@ en:
         abstract_number: Abstract number
         presentation_type: Presentation
   seminar:
+    signup_limit: Signup Limit
     participant_list: Participant list
     back: Back
     please_login_first: "Please login first!"
@@ -154,6 +155,7 @@ en:
     sign_up_not_yet: Does Not Yet Allow Sign Up #報名時間未開始
     sign_up_not_open: Does Not Open Sign Up #未開放報名
     sign_up_overdue: Sign Up Overdue #報名時間已過
+    sign_up_is_full: "Sign up is FULL!"
     sign_up_failed: "Sign up failed!"
     contribute_file_count: Count of Contribute Files #投稿檔案數
 

config/locales/zh_tw.yml

@@ -28,6 +28,7 @@ zh_tw:
         abstract_number: 摘要編號
         presentation_type: 發表方式
   seminar:
+    signup_limit: 報名限制人數
     participant_list: 參加者名單
     back: 回上一頁
     please_login_first: "請先登入!"
@@ -155,6 +156,7 @@ zh_tw:
     sign_up_not_yet: 報名時間未開始
     sign_up_not_open: 未開放報名
     sign_up_overdue: 報名時間已過
+    sign_up_is_full: "報名已額滿!"
     sign_up_failed: "報名失敗"
     contribute_file_count: 投稿檔案數
 

config/routes.rb

@@ -1,4 +1,8 @@
 Rails.application.routes.draw do
+  OrbitHelper::SharedMutex.synchronize do
+    OrbitHelper::SharedHash['seminar'][:counter] = SeminarMain.where(:signup_limit.ne => nil).map{|v| [v.id, v.seminar_signups.count]}.to_h
+    OrbitHelper::SharedHash['seminar'][:limit] = SeminarMain.where(:signup_limit.ne => nil).map{|v| [v.id, v.signup_limit]}.to_h
+  end
   Thread.new do
     if Page.fields.include?('all_pageids')
       s = Site.first

seminar.gemspec

@@ -93,4 +93,7 @@ Gem::Specification.new do |s|
   s.test_files = Dir["test/**/*"]
   s.add_dependency "custom_announcement"
   s.add_dependency "custom_gallery"
+  s.metadata = {
+    "global_hash" => "{counter: {}, limit: {}}"
+  }
 end