From 54740920b392368552169ceb5955f8b3c5880a83 Mon Sep 17 00:00:00 2001
From: ratanphayade <ratanphayade@gmail.com>
Date: Mon, 13 Jul 2020 14:24:25 +0530
Subject: [PATCH] custom: custom operation separated

---
 custom.go | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 custom.go

diff --git a/custom.go b/custom.go
new file mode 100644
index 0000000..bae18a6
--- /dev/null
+++ b/custom.go
@@ -0,0 +1,32 @@
+package main
+
+import "log"
+
+type callerFunc func(collector, ...string) string
+
+const (
+	CustomCustom = "custom"
+)
+
+var (
+	call = map[string]callerFunc{
+		CustomCustom: callCustom,
+	}
+)
+
+func customCall(data collector, tokens []string) string {
+	if len(tokens) < 1 {
+		log.Println("error: invalid number of arguments in call")
+		return ""
+	}
+
+	if caller, ok := call[tokens[0]]; ok {
+		return caller(data, tokens[1:]...)
+	}
+
+	return ""
+}
+
+func callCustom(data collector, tokens ...string) string {
+	return "this is a custom field"
+}