52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
package builder
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import (
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. "openreplay/backend/pkg/messages"
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)
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type domDropDetector struct {
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removedCount int
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lastDropTimestamp uint64
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}
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const DROP_WINDOW = 200 //ms
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const CRITICAL_COUNT = 1 // Our login page contains 20. But on crush it removes only roots (1-3 nodes).
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func (f *domDropDetector) HandleMessage(message Message, timestamp uint64) *IssueEvent {
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switch message.(type) {
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case *CreateElementNode,
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*CreateTextNode:
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f.HandleNodeCreation()
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case *RemoveNode:
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f.HandleNodeRemoval(timestamp)
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case *CreateDocument:
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return f.Build()
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}
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return nil
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}
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func (dd *domDropDetector) HandleNodeCreation() {
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dd.removedCount = 0
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dd.lastDropTimestamp = 0
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}
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func (dd *domDropDetector) HandleNodeRemoval(ts uint64) {
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if dd.lastDropTimestamp+DROP_WINDOW > ts {
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dd.removedCount += 1
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} else {
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dd.removedCount = 1
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}
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dd.lastDropTimestamp = ts
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}
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func (dd *domDropDetector) Build() *IssueEvent {
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var domDrop *IssueEvent
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if dd.removedCount >= CRITICAL_COUNT {
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domDrop = &IssueEvent{
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Type: "dom_drop",
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Timestamp: dd.lastDropTimestamp}
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}
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dd.removedCount = 0
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dd.lastDropTimestamp = 0
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return domDrop
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}
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