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Merge pull request #3442 from node-red/dupe-links
Prevent duplicate links being added between nodes
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commit
3d8505385a
@ -600,6 +600,14 @@ RED.nodes = (function() {
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RED.events.emit('nodes:add',n);
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}
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function addLink(l) {
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if (nodeLinks[l.source.id]) {
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const isUnique = nodeLinks[l.source.id].out.every(function(link) {
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return link.sourcePort !== l.sourcePort || link.target.id !== l.target.id
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})
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if (!isUnique) {
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return
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}
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}
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links.push(l);
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if (l.source) {
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// Possible the node hasn't been added yet
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