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index.js
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index.js
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const fs = require('fs')
const path = require('path')
const { spawn } = require('child_process')
function spawnCommand(command, args) {
const processing = spawn(
path.resolve(__dirname, './jasperstarter/bin/jasperstarter'),
[command, ...args]
)
let errorMessages = ""
processing.stdout.on('data', (data) => {
if (data) console.log(`stdout: ${data}`);
})
processing.stderr.on('data', (data) => {
errorMessages += data + "\r\n"
})
return new Promise((resolve, reject) => {
processing.on('exit', code => {
if (code === 0) {
resolve()
} else {
reject(errorMessages)
}
})
})
}
module.exports = {
/**
* compile jrxml to jasper file
*
* @param {string} jrxml the path of jrxml file
* @param {string} output the path of jrxml file
* @returns {Promise<string>} the path of jasper file
*/
async compile(jrxml, output = null) {
return new Promise((resolve, reject) => {
let args = [jrxml]
if (output !== null) args.unshift("-o", output)
spawnCommand("compile", args)
.then(() => resolve(output || jrxml.replace(".jrxml", ".jasper")))
.catch(e => reject(e))
})
},
/**
* generate report by jasper file, or it will auto compile if input jrxml
*
* @param {{jrxml: string, jasper: string, output: string, format: "pdf"|"docx"|"xlsx"|"pptx"|"odt"|"ods", input: Array, type: "json"}}
* @returns {Promise<Buffer>}
*/
async generate({
jrxml,
jasper,
output,
format = "pdf",
input,
type = "json",
}) {
if (
(jrxml && !jasper) ||
(!fs.existsSync(jasper) && fs.existsSync(jasper.replace(".jasper", ".jrxml")))
) jasper = await module.exports.compile(jrxml || jasper.replace(".jasper", ".jrxml"))
return new Promise((resolve, reject) => {
spawnCommand("process", [
jasper,
"-o", output,
"-f", format,
"-t", type,
"--data-file", input
])
.then(() => resolve(fs.readFileSync(`${output}.${format}`)))
.catch(e => reject(e))
})
},
}