module.exports = function(RED) { "use strict"; function RandomNode(n) { RED.nodes.createNode(this,n); this.low = n.low this.high = n.high this.inte = n.inte || false; this.property = n.property||"payload"; var node = this; var tmp = {}; this.on("input", function(msg) { tmp.low = 1 // set this as the default low value tmp.low_e = "" if (node.low) { // if the the node has a value use it tmp.low = node.low } else if ('from' in msg) { // else see if a 'from' is in the msg if (Number(msg.from)) { // if it is, and is a number, use it tmp.low = Number(msg.from); } else { // otherwise setup NaN error tmp.low = NaN; tmp.low_e = " From: " + msg.from; // setup to show bad incoming msg.from } } tmp.high = 10 // set this as the default high value tmp.high_e = ""; if (node.high) { // if the the node has a value use it tmp.high = node.high } else if ('to' in msg) { // else see if a 'to' is in the msg if (Number(msg.to)) { // if it is, and is a number, use it tmp.high = Number(msg.to); } else { // otherwise setup NaN error tmp.high = NaN tmp.high_e = " To: " + msg.to // setup to show bad incoming msg.to } } // if tmp.low or high are not numbers, send an error msg with bad values if ( (isNaN(tmp.low)) || (isNaN(tmp.high)) ) { this.error("Random: one of the input values is not a number. " + tmp.low_e + tmp.high_e); } else { // at this point we have valid values so now to generate the random number! // flip the values if low > high so random will work var value = 0; if (tmp.low > tmp.high) { value = tmp.low tmp.low = tmp.high tmp.high = value } // if returning an integer, do a math.ceil() on the low value and a // Math.floor()high value before generate the random number. This must be // done to insure the rounding doesn't round up if using something like 4.7 // which would end up with 5 if ( (node.inte == "true") || (node.inte === true) ) { tmp.low = Math.ceil(tmp.low); tmp.high = Math.floor(tmp.high); // use this to round integers value = Math.round(Math.random() * (tmp.high - tmp.low + 1) + tmp.low - 0.5); } else { // use this to round floats value = (Math.random() * (tmp.high - tmp.low)) + tmp.low; } RED.util.setMessageProperty(msg,node.property,value); node.send(msg); } }); } RED.nodes.registerType("random",RandomNode); }