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assign-available-port.js
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assign-available-port.js
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module.exports = assignAvailablePort
function assignAvailablePort (node) {
var nodeInfo = node.context.nodeInfo.lookup[node().node]
if (nodeInfo && node.port && nodeInfo.portMatch) {
if (!node.port() || !nodeInfo.portMatch.exec(node.port())) {
var availablePorts = node.context.midiPorts().filter(function (name) {
return nodeInfo.portMatch.exec(name)
})
var usedPorts = []
node.context.collection.forEach(function (controller) {
if (controller) {
var name = controller.port && controller.port()
if (availablePorts.includes(name)) {
usedPorts.push(name)
}
}
})
var portName = getRarest(availablePorts.concat(usedPorts))
node.port.set(portName)
}
}
}
function getRarest (array) {
var ranked = array.reduce(function (result, item) {
result[item] = (result[item] || 0) + 1
return result
}, {})
return Object.keys(ranked).sort(function (a, b) {
return ranked[a] - ranked[b]
})[0]
}