Work on #12: Move each providers in their own packages

alerting/provider/pagerduty/pagerduty.go

@@ -0,0 +1,36 @@
+package pagerduty
+
+import (
+	"fmt"
+	"github.com/TwinProduction/gatus/alerting/provider/custom"
+	"github.com/TwinProduction/gatus/core"
+)
+
+type AlertProvider struct {
+	IntegrationKey string `yaml:"integration-key"`
+}
+
+func (provider *AlertProvider) IsValid() bool {
+	return len(provider.IntegrationKey) == 32
+}
+
+// https://developer.pagerduty.com/docs/events-api-v2/trigger-events/
+func (provider *AlertProvider) ToCustomAlertProvider(eventAction, resolveKey string, service *core.Service, message string) *custom.AlertProvider {
+	return &custom.AlertProvider{
+		Url:    "https://events.pagerduty.com/v2/enqueue",
+		Method: "POST",
+		Body: fmt.Sprintf(`{
+  "routing_key": "%s",
+  "dedup_key": "%s",
+  "event_action": "%s",
+  "payload": {
+    "summary": "%s",
+    "source": "%s",
+    "severity": "critical"
+  }
+}`, provider.IntegrationKey, resolveKey, eventAction, message, service.Name),
+		Headers: map[string]string{
+			"Content-Type": "application/json",
+		},
+	}
+}

alerting/provider/pagerduty/pagerduty_test.go

@@ -0,0 +1,14 @@
+package pagerduty
+
+import "testing"
+
+func TestAlertProvider_IsValid(t *testing.T) {
+	invalidProvider := AlertProvider{IntegrationKey: ""}
+	if invalidProvider.IsValid() {
+		t.Error("provider shouldn't have been valid")
+	}
+	validProvider := AlertProvider{IntegrationKey: "00000000000000000000000000000000"}
+	if !validProvider.IsValid() {
+		t.Error("provider should've been valid")
+	}
+}