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/**
* dynamic-handlebar-pdf
*
*
* Copyright (c) 2017 Navjot Dhanawat
* Licensed under the MIT license.
*/
/**
* Dynamic handlebars pdf is used to create pdf from handlebar templates.
* @param {document, options}
* @return {callback}
*/
var Handlebars = require('handlebars'),
pdf = require('html-pdf');
module.exports = {};
module.exports.create = (document, options) => {
// Compile handlebar template
return new Promise((resolve, reject) => {
if (!document || !document.template || !document.context) {
reject(new Error("Some, or all, options are missing."));
}
if (document.type !== 'buffer' && !document.path) {
reject(new Error("Please provide path parameter to save file or if you want buffer as output give parameter type = 'buffer'"));
}
Handlebars.registerHelper('math', function(lvalue, operator, rvalue, options) {
lvalue = parseFloat(lvalue);
rvalue = parseFloat(rvalue);
return {
'+': lvalue + rvalue,
'-': lvalue - rvalue,
'*': lvalue * rvalue,
'/': lvalue / rvalue,
'%': lvalue % rvalue
}[operator];
});
var html = Handlebars.compile(document.template)(document.context);
var pdfPromise = pdf.create(html, options);
if (document.type === 'buffer') {
// Create PDF from html template generated by handlebars
//Output will be buffer
pdfPromise.toBuffer((err, buff) => {
if (!err)
resolve(buff);
else
reject(err);
});
} else {
// Create PDF from html template generated by handlebars
// Output will be PDF file
pdfPromise.toFile(document.path, (err, res) => {
if (!err)
resolve(res);
else
reject(err);
});
}
});
};
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