From 0d263179b47429f738ddf775745c894a508d4e7f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Rudowicz?= <michal.rudowicz@fl9.eu>
Date: Tue, 13 Feb 2024 23:20:15 +0100
Subject: [PATCH] FilterByType()

---
 filters.go      | 23 +++++++++++++++++++++++
 filters_test.go | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 filters.go
 create mode 100644 filters_test.go

diff --git a/filters.go b/filters.go
new file mode 100644
index 0000000..62b78f0
--- /dev/null
+++ b/filters.go
@@ -0,0 +1,23 @@
+package main
+
+import (
+	"github.com/probakowski/go-satel"
+)
+
+func FilterByType(ev <-chan satel.Event, allowedTypes []satel.ChangeType) <-chan satel.Event {
+	returnChan := make(chan satel.Event)
+
+	go func() {
+		for e := range ev {
+			for _, allowedType := range allowedTypes {
+				if allowedType == e.Type {
+					returnChan <- e
+					continue
+				}
+			}
+		}
+		close(returnChan)
+	}()
+
+	return returnChan
+}
diff --git a/filters_test.go b/filters_test.go
new file mode 100644
index 0000000..b36f4dd
--- /dev/null
+++ b/filters_test.go
@@ -0,0 +1,37 @@
+package main
+
+import (
+	"sync"
+	"testing"
+
+	"github.com/probakowski/go-satel"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSatelEventTypeFiltering(t *testing.T) {
+	testEvents := make(chan satel.Event)
+	receivedEvents := make([]satel.Event, 0)
+	wg := sync.WaitGroup{}
+
+	go func() {
+		wg.Add(1)
+		for e := range FilterByType(testEvents, []satel.ChangeType{satel.ArmedPartition, satel.PartitionFireAlarm}) {
+			receivedEvents = append(receivedEvents, e)
+		}
+		wg.Done()
+	}()
+
+	testEvents <- satel.Event{Type: satel.ArmedPartition, Index: 1, Value: true}
+	testEvents <- satel.Event{Type: satel.DoorOpened, Index: 2, Value: true}
+	testEvents <- satel.Event{Type: satel.PartitionAlarm, Index: 3, Value: true}
+	testEvents <- satel.Event{Type: satel.PartitionFireAlarm, Index: 4, Value: true}
+	testEvents <- satel.Event{Type: satel.TroublePart1, Index: 5, Value: true}
+	testEvents <- satel.Event{Type: satel.ZoneTamper, Index: 6, Value: true}
+
+	close(testEvents)
+	wg.Wait()
+
+	assert.Len(t, receivedEvents, 2)
+	assert.Contains(t, receivedEvents, satel.Event{Type: satel.ArmedPartition, Index: 1, Value: true})
+	assert.Contains(t, receivedEvents, satel.Event{Type: satel.PartitionFireAlarm, Index: 4, Value: true})
+}