add the claim mechanism

app/controllers/claims_controller.rb

@@ -0,0 +1,138 @@
+#coding=utf-8
+class ClaimsController < ApplicationController
+    # skip_before_action :verify_authenticity_token
+    protect_from_forgery with: :null_session
+    before_action :require_login, except: [:index]
+    before_action :set_issue
+
+    def index
+        @user_claimed = 0
+        @claims = @issue.claims.claim_includes.order("created_at desc")
+    
+        @claims.each do |claim|
+            if claim.user_id == current_user.id
+                @user_claimed = 1
+                break
+            end
+        end 
+        render file: 'app/views/claims/list.json.jbuilder'
+    end
+
+    def create
+        @claim = Claim.find_by_sql(["select id from claims where issue_id=? and user_id=?",params[:issue_id], current_user.id])
+        if @claim.present?
+            return normal_status(-1,"您已经声明过该易修")
+        end
+
+        ActiveRecord::Base.transaction do
+            @claim = Claim.new(parse_issue_params(params))
+            if @claim.save
+                @claims = @issue.claims.claim_includes.order("created_at desc")
+                @user_claimed = 1
+                
+                journal_params = {
+                    journalized_id: params[:issue_id],
+                    journalized_type: "Issue",
+                    user_id: current_user.id ,
+                    notes: "新建声明: #{params[:claim_note]}",
+                }
+
+                journal = Journal.new(journal_params)
+                if journal.save
+                    render file: 'app/views/claims/list.json.jbuilder'
+                else
+                    normal_status(-1,"新建声明关联评论操作失败")
+                end
+
+            else
+                normal_status(-1,"新建声明操作失败")
+            end
+        end 
+    end
+
+    def update
+        @claim =  Claim.find_by_id(params[:claim_id])
+        if @claim.blank? 
+            return normal_status(-1,"易修不存在")
+        end
+
+        if @claim.user_id != current_user.id
+            return normal_status(-1,"你不能更新别人的声明")
+        end
+
+        ActiveRecord::Base.transaction do
+            if @claim.update_attribute(:note,params[:claim_note])
+                @claims = @issue.claims.claim_includes.order("created_at desc")
+                @user_claimed = 1
+               
+                journal_params = {
+                    journalized_id: params[:issue_id],
+                    journalized_type: "Issue",
+                    user_id: current_user.id ,
+                    notes: "更新声明: #{params[:claim_note]}",
+                }
+
+                journal = Journal.new(journal_params)
+                if journal.save
+                    render file: 'app/views/claims/list.json.jbuilder'
+                else
+                    normal_status(-1,"新建声明关联评论操作失败")
+                end
+
+            else
+                normal_status(-1,"声明更新操作失败")
+            end
+        end 
+    end
+
+    def destroy
+        @claim = Claim.find_by_sql(["select id from claims where issue_id=? and user_id=?",params[:issue_id], current_user.id])
+        if @claim.blank?
+            normal_status(-1,"您未曾声明过该易修")
+        else 
+            @claim = @claim[0]
+            # 判断current user是否是claimer
+            ActiveRecord::Base.transaction do
+                if @claim.destroy
+
+                    @claims = @issue.claims.claim_includes.order("created_at desc")
+                    @user_claimed = 0
+
+                    journal_params = {
+                        journalized_id: params[:issue_id],
+                        journalized_type: "Issue",
+                        user_id: current_user.id ,
+                        notes: "取消声明",
+                    }
+    
+                    journal = Journal.new(journal_params)
+                    if journal.save
+                        render file: 'app/views/claims/list.json.jbuilder'
+                    else
+                        normal_status(-1,"新建声明关联评论操作失败")
+                    end
+
+                else
+                    normal_status(-1,"取消声明操作失败")
+                end
+            end 
+        end 
+    end
+
+    private
+    def parse_issue_params(params)
+        {
+            issue_id: params[:issue_id],
+            user_id: current_user.id,
+            note: params[:claim_note],
+        }
+    end
+
+    def set_issue
+        @issue = Issue.find_by_id(params[:issue_id])
+        unless @issue.present?
+          normal_status(-1, "易修不存在")
+        end
+      end
+
+end