add new files

app/models/batch_line_item.rb

@@ -0,0 +1,89 @@
+class BatchLineItem < ApplicationRecord
+	belongs_to :batch 	 
+	attr_accessor :wristband_token 
+
+	def self.generate_account_no
+		super_merchant = "101"
+		account_type='1'
+		location='101'
+
+  		o = [('0'..'9')].map { |i| i.to_a }.flatten
+  		random_account_no = (0...9).map { o[rand(o.length)] }.join
+
+  		account_no = super_merchant+account_type+location+random_account_no
+  		find_account_no = BatchLineItem.find_by_wristband_code(account_no)
+  		if !find_account_no.nil?		 
+			o = [('0'..'9')].map { |i| i.to_a }.flatten
+			random_account_no = (0...9).map { o[rand(o.length)] }.join
+			account_no = super_merchant+account_type+location+random_account_no		
+		end
+		return account_no 
+  	end
+
+  	def self.generate_serial_no(user_id)
+	    find_lookup=Lookup.find_by_name('generate_serial_no')
+	    if !find_lookup.nil?
+	    	max_value=find_lookup.max_value
+	    	max_value=max_value +1
+	    	prefix=find_lookup.prefix
+	    	max_length=find_lookup.max_length	    	
+	    	sufix_len=max_length-prefix.length 
+	    	sufix_str="0" * sufix_len	      
+	    	value_len= max_value.to_s.length	 
+	    	start=0
+	    	ends=sufix_len-value_len-1
+	    	sufix_str= sufix_str[start..ends]
+	    	prefix=prefix[start..2]
+	    	prefix_str=prefix.to_s + user_id.to_s
+
+	    	serial_no=prefix_str.to_s+sufix_str+max_value.to_s	    	
+	    	return serial_no
+	    end
+	end
+	def self.to_csv(user_id)
+		encrypt_key=""
+		
+		find_user=User.find_by_id(user_id)
+        if !find_user.nil?
+            encrypt_key=find_user.secrect_key          
+        end
+	    attributes = %w{serial_no wristband_code batch_id manufacture_uid card_type wristband_token}
+	    CSV.generate(headers: true) do |csv|
+	        csv << attributes     
+	        all.each do |encoder|  	        	 
+	        	str="manufacture_uid="+encoder.manufacture_uid.to_s+"&serial_no="+encoder.serial_no.to_s  	       
+	        	encryptd_data=BatchLineItem.encrypted(str,encrypt_key)	         
+	            encoder.wristband_token=encryptd_data
+	            
+	        	csv << attributes.map{ |attr| encoder.send(attr)}
+	      	end
+	    end
+  	end
+  	def self.encrypted(message,encrypt_key)  		 
+  		cipher = OpenSSL::Cipher::Cipher.new("aes-256-cbc")
+  		cipher.encrypt
+
+  		key = Digest::SHA1.hexdigest(encrypt_key)
+  		iv =encrypt_key
+
+  		cipher.key = encrypt_key
+  		cipher.iv = encrypt_key
+
+  		encrypted = cipher.update(message)
+  		encrypted << cipher.final
+
+  		encrypted=Base64.encode64(encrypted)
+
+  		return encrypted 
+  	end
+# 	def self.encrypted(data,encrypt_key)
+# 	    crypt = ActiveSupport::MessageEncryptor.new(encrypt_key)
+# 	    encrypted_data = crypt.encrypt_and_sign(data)  	   
+# 	    encrypted_data=Digest::MD5.hexdigest(encrypted_data)  	   
+
+# 	    data=encrypted_data.hex  	    
+# 	    data=data.to_s
+
+	# return data[0..15]
+# 	end     
+end