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