add docxtemplater and download route

package.json

@@ -8,12 +8,14 @@
   "dependencies": {
     "cookie-parser": "~1.4.4",
     "debug": "~2.6.9",
+    "docxtemplater": "^3.21.1",
     "ejs": "~2.6.1",
     "express": "~4.16.1",
     "http-errors": "~1.6.3",
-    "mammoth": "^1.4.16",
+    "jalali-moment": "^3.3.10",
     "morgan": "~1.9.1",
     "pg": "^8.5.1",
+    "pizzip": "^3.0.6",
     "sequelize": "^6.5.0"
   }
 }

routes/users.js

@@ -1,10 +1,11 @@
 var express = require('express');
 var router = express.Router();
 const userServeice = require('../services/user')
+const fs = require('fs')
+var path = require('path');
+
 
-/* GET users listing. */
 router.post('/add', function(req, res) {
-  console.log('hereeeeeeeeee');
   const userInfo ={
     firstName : req.body.firstName,
     lastName :  req.body.lastName,
@@ -76,4 +77,12 @@ router.post('/complete/form', function(req, res) {
   })
 })
 
+router.get('/download/:fileName', function(req, res){
+  var file = fs.readFileSync(path.join(__dirname + `/../public/files/${req.params.fileName}`), 'binary');
+
+  res.setHeader('Content-Length', file.length);
+  res.write(file, 'binary');
+  res.end();
+});
+
 module.exports = router;

services/user.js

@@ -1,5 +1,7 @@
-let models = require('../models')
-let mammoth = require("mammoth");
+const models = require('../models')
+const jalali = require("jalali-moment");
+const docxTemp = require('../tools/docxtemp')
+
 
 let methods = {}
 let privates = {
@@ -23,31 +25,11 @@ let privates = {
                 })
             })
     
-        })
-    },
-    replaceInfo : (user)=>{
-        console.log(user);
-        return new Promise((resolve, reject) => {
-            mammoth.convertToHtml({path: "./template/Hform4.docx"})
-            .then((result)=>{
-                let text = result.value;
-                for (const property in user) {
-                    console.log('++++++++++++++++++++++++');
-                    console.log(property);
-                    result.value =result.value.replace(`[${property}]`, `${user[property]}`);
-                  }
-                resolve(result.value)
-            }).catch(err => {
-                reject({
-                    eCode: 500,
-                    eText: err
-                })
-            })
-    
         })
     }
 
 }
+
 methods.addUser = (userInfo) => {
     return new Promise((resolve, reject) => {
         models.User.create(userInfo).then((user) => {
@@ -68,7 +50,13 @@ methods.completeForm =(userId)=>{
     return new Promise((resolve, reject) => {
         privates.findUser(userId)
         .then(user=>{
-           return privates.replaceInfo(user)
+            let userInfo = user
+            userInfo.fullName = user.firstName + ' ' + user.lastName
+            userInfo.obligationDate = jalali( user.obligationDate, 'YYYY/MM/DD').locale('fa').format('YYYY/MM/DD')
+            userInfo.requestDate = jalali( user.requestDate, 'YYYY/MM/DD').locale('fa').format('YYYY/MM/DD')
+            userInfo.writtenOrderDate = jalali( user.writtenOrderDate, 'YYYY/MM/DD').locale('fa').format('YYYY/MM/DD')
+
+            return docxTemp(userInfo, 'Hform4.docx')
         }).then(text=>{
             resolve(text)
         }).catch(err => {

tools/docxtemp.js

@@ -0,0 +1,67 @@
+const PizZip = require('pizzip');
+const Docxtemplater = require('docxtemplater');
+const fs = require('fs');
+const path = require('path');
+
+// The error object contains additional information when logged with JSON.stringify (it contains a properties object containing all suberrors).
+function replaceErrors(key, value) {
+    if (value instanceof Error) {
+        return Object.getOwnPropertyNames(value).reduce(function (error, key) {
+            error[key] = value[key];
+            return error;
+        }, {});
+    }
+    return value;
+}
+
+function errorHandler(error) {
+    console.log(JSON.stringify({
+        error: error
+    }, replaceErrors));
+
+    if (error.properties && error.properties.errors instanceof Array) {
+        const errorMessages = error.properties.errors.map(function (error) {
+            return error.properties.explanation;
+        }).join("\n");
+        console.log('errorMessages', errorMessages);
+        // errorMessages is a humanly readable message looking like this :
+        // 'The tag beginning with "foobar" is unopened'
+    }
+    throw error;
+}
+
+module.exports = function (userInfo, fileName) {
+    return new Promise((resolve, reject) => {
+        let content = fs.readFileSync(path.resolve(__dirname, `../template/${fileName}`), 'binary');
+        let zip = new PizZip(content);
+        let doc;
+
+        try {
+            doc = new Docxtemplater(zip);
+        } catch (error) {
+            errorHandler(error);
+        }
+
+        doc.setData(userInfo);
+
+        try {
+            doc.render()
+        } catch (error) {
+            errorHandler(error);
+        }
+
+        let buf = doc.getZip().generate({
+            type: 'nodebuffer'
+        });
+        fs.writeFileSync(path.resolve(__dirname, `../public/files/${userInfo.firstName}-${userInfo.lastName}-${fileName}`), buf);
+        resolve(`http://localhost:3000/users/download/${userInfo.firstName}-${userInfo.lastName}-${fileName}`)
+
+            .catch(err => {
+                reject({
+                    eCode: 500,
+                    eText: err
+                })
+            })
+    })
+
+}