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const ipc = require('node-ipc')
const db = require('../db')
const tools = require('../tools')
const fs = require('fs')
const path = require('path')
const execFile = require('child_process').execFile
const Loader = require('../vendor/Loader')
let processing = false
module.exports = function processTask() {
if (processing) return
processing = true
db.models.task.index({ completed: false, limit: 1 }).then( (tasks) => {
// console.log(tasks.length + ' tasks left to process')
console.log('fetching tasks...')
if (! tasks || tasks.length === 0) {
console.log('> completed all tasks!')
processing = false
return
}
task = tasks.at ? tasks.at(0) : tasks[0]
console.log('running task #', task ? task.id : '??')
return processTaskPromise(task)
}).then( () => {
console.log('done')
if (processing) {
processing = false
setTimeout( processTask )
}
})
}
function processTaskPromise(task) {
return new Promise ( (resolve, reject) => {
initTask(task)
.then(() => { return runTask(task) })
.then(() => { return processDone(task) })
.then(() => { return resolve() })
})
}
function initTask() {
return new Promise ( (resolve, reject) => {
if (task.content_file.type !== 'audio') reject()
if (task.style_file.type !== 'audio') reject()
constructFilePath(task.content_file)
constructFilePath(task.style_file)
db.models.folder.findOrCreate({ name: 'output' })
.then( (folder) => {
task.output_file = {
type: 'audio',
name: (folder.name || 'output') + '_' + Date.now() + '.aiff',
folder_id: folder.id,
processed: false,
}
constructFilePath(task.output_file)
resolve()
})
})
}
function checkAccess(file) {
return new Promise ( (resolve, reject) => {
fs.access(file.aiffPath, fs.constants.R_OK, (err) => {
if (err) reject()
else resolve()
})
})
}
function runTask(fullPath) {
return new Promise ( (resolve, reject) => {
console.log('running task')
console.log('create output file record...')
console.log(task.output_file.path)
const tool = tools[ task.tool ]
execFile(tool.cmd, [
tool.script_path,
task.content_file.path,
task.style_file.path,
task.output_file.path,
], (err, stdout, stderr) => {
console.log(stdout, stderr)
db.models.file.create(task.output_file).then( file => {
task.output_file = file
task.output_file_id = file.id
resolve()
})
})
})
}
function processDone(task) {
task.completed = true
// console.log(task)
ipc.of.cortex && ipc.of.cortex.emit("completed", { task: task })
return db.models.task.update(task.id, task)
}
function constructFilePath (file) {
file.path = path.join(__dirname, '../..', 'public/data', String(file.folder_id), String(file.name))
switch (file.type) {
case 'audio':
file.aiffPath = file.mime === 'audio/aiff' ? file.path : file.path + '.aiff'
break
}
}
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