Commit project

middleware/gift-card-number.js

@@ -0,0 +1,193 @@
+'use strict';
+
+const Merchant      = require('mongoose').model('Merchant');
+const Branch        = require('mongoose').model('Branch');
+const GiftCard      = require('mongoose').model('GiftCard');
+const Response     = require('../etc/responses.json');
+
+
+/*
+ * Gather date, merchant_id, branch_id and gift card sequence
+ * to generate a gift_card_number
+*/
+module.exports = (req, res, next) => {
+  getMerchantNumber(req, res);
+}
+
+// MARK: get merchant number
+function getMerchantNumber(req, res) {
+  // Merchant number
+  Merchant.findOne({ _id: req.body.merchant_id }, (err, doc) => {
+    if (err || !doc) return res.status(500).json({
+      success: false,
+      message: Response.r0[req.body.language],
+      error_code: 'e0'
+    });
+    else {
+      // Make sure the merchant number always has 3 digits
+      var numberString = doc.number.toString();
+      if (numberString.length === 1) {
+        numberString = "00" + numberString;
+      }
+      else if (numberString.length === 2) {
+        numberString = "0" + numberString;
+      }
+      
+      req.body.merchant_number = numberString;
+      req.body.merchant_name = doc.merchant_name;
+      getBranchNumber(req, res);
+    }
+  });
+}
+
+// MARK: get branch number
+function getBranchNumber(req, res) {
+  // Branch number
+  Branch.findOne({ _id: req.body.branch_id }, (err, doc) => {
+    if (err) return res.status(500).json({
+      success: false,
+      message: Response.r0[req.body.language],
+      error_code: 'e0'
+    });
+    if (!doc) {
+      // This Merchant has only the main office, no branches.
+      req.body.branch_number = req.body.merchant_id;
+      req.body.branch_number = "00";
+      req.body.branch_name = req.body.merchant_name;
+    }
+    else {
+      // Make sure the branch number always has 2 digits
+      var numberString = doc.number.toString();
+      if (numberString.length === 1) {
+        numberString = "0" + numberString;
+      }
+      
+      req.body.branch_number = numberString;
+      req.body.branch_name = doc.branch_name;
+    }
+    
+    generateCardNumber(req, res);
+  });
+}
+
+// MARK: generate card number
+function generateCardNumber(req, res) {
+  // Get date
+  var d = new Date();
+  var year = d.getFullYear().toString().substr(-2);
+  var month = (d.getMonth() + 1).toString();
+  if (month.length === 1) {
+    month = "0" + month;
+  }
+  var day = d.getDate().toString();
+  if (day.length === 1) {
+    day = "0" + day;
+  }
+  
+  // Get next available card number
+  GiftCard.findOne({ merchant_id: req.body.merchant_id, branch_id: req.body.branch_id }).sort({ number: -1 }).limit(1).exec((err, doc) => {
+    var numberString;
+    
+    if (err) return res.status(500).json({
+      success: false,
+      message: Response.r0[req.body.language],
+      error_code: 'e0'
+    });
+    if (!doc) {
+      req.body.number = 1;
+      numberString = '1';
+    }
+    else {
+      req.body.number = doc.number + 1;
+      numberString = req.body.number.toString();
+    }
+    
+    // Make sure the card number always has 4 digits
+    if (numberString.length === 1) {
+      numberString = "000" + numberString;
+    }
+    else if (numberString.length === 2) {
+      numberString = "00" + numberString;
+    }
+    else if (numberString.length === 3) {
+      numberString = "0" + numberString;
+    }
+    
+    // Trim numbers with more than 4 digits. The date components will guarantee the cardNumber uniqueness.
+    else if (numberString.length >= 4) {
+      numberString = numberString.slice(-4);
+    }
+    
+    // Finally compose complete card number
+    const cardNumber =
+      year +
+      month +
+      day +
+      req.body.merchant_number +
+      req.body.branch_number +
+      numberString
+    
+    req.body.gift_card_number = cardNumber;
+    
+    addGiftCard(req, res);
+  });
+}
+
+// MARK: add gift card
+function addGiftCard(req, res) {
+  req.body.balance = 0;
+  req.body.points = 0;
+  var msg;
+  if (res.locals.fromAddClient) {
+    msg = Response.r78[req.body.language];
+  }
+  else {
+    msg = Response.r79[req.body.language];
+  }
+  
+  var newGiftCard = new GiftCard(req.body);
+  newGiftCard.save((err, doc) => {
+    if (err) {
+      // Gift card number not unique due to simultaneous creation
+      console.log('Gift card number not unique due to simultaneous creation. New number assigned automatically.');
+      const number = Number(req.body.gift_card_number) + 1;
+      req.body.gift_card_number = number.toString();
+      newGiftCard = new GiftCard(req.body);
+      newGiftCard.save((err2, doc2) => {
+        if (err2) {
+          return res.status(400).json({
+            success: false,
+            message: Response.r80[req.body.language],
+            error: 'e32'
+          });
+        }
+        else {
+          return res.status(200).json({
+            success: true,
+            message: msg,
+            client_name: req.body.client_name,
+            client_id: req.body.client_id,
+            gift_card_number: doc2.gift_card_number,
+            merchant_name: req.body.merchant_name,
+            branch_name: req.body.branch_name,
+            balance: doc2.balance,
+            points: doc2.points
+          });
+        }
+      })
+    }
+    else {
+      return res.status(200).json({
+        success: true,
+        message: msg,
+        client_name: req.body.client_name,
+        client_id: req.body.client_id,
+        gift_card_number: doc.gift_card_number,
+        merchant_name: req.body.merchant_name,
+        branch_name: req.body.branch_name,
+        balance: doc.balance,
+        points: doc.points
+      });
+    }
+  });
+}