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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;
}
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module.exports = function (templateInfo, fileName) {
return new Promise((resolve, reject) => {
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for (const key in templateInfo) {
if (!templateInfo[key]) {
throw({
eCode: 406,
eText: 'empty fields'
})
}
}
let content = fs.readFileSync(path.resolve(__dirname, `../template/${fileName}`), 'binary');
let zip = new PizZip(content);
let doc;
try {
doc = new Docxtemplater(zip);
} catch (error) {
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errorHandler(error);
}
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doc.setData(templateInfo);
try {
doc.render()
} catch (error) {
errorHandler(error);
}
let buf = doc.getZip().generate({
type: 'nodebuffer'
});
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fs.writeFileSync(path.resolve(__dirname, `../public/files/${templateInfo.firstName}-${templateInfo.lastName}-${fileName}`), buf);
resolve(`http://localhost:3000/users/download/${templateInfo.firstName}-${templateInfo.lastName}-${fileName}`)
.catch(err => {
reject({
eCode: 500,
eText: err
})
})
})
}