From 64daf7b1324d36bd1603095f4ff07cff6971b7e9 Mon Sep 17 00:00:00 2001
From: Alexander <a.hywax@gmail.com>
Date: Thu, 21 Dec 2023 00:44:45 +0500
Subject: [PATCH] Add method for converting object to JSON in template (#319)

* Add method for converting object to JSON in template

* Split  to ,

* Rename toJson function
---
 cmd/backup/notifications.go          | 23 ++++++++++++++++++++++-
 docs/how-tos/set-up-notifications.md |  2 ++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/cmd/backup/notifications.go b/cmd/backup/notifications.go
index 9739418..7ec60f7 100644
--- a/cmd/backup/notifications.go
+++ b/cmd/backup/notifications.go
@@ -6,6 +6,7 @@ package main
 import (
 	"bytes"
 	_ "embed"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"os"
@@ -84,7 +85,9 @@ var templateHelpers = template.FuncMap{
 	"formatBytesBin": func(bytes uint64) string {
 		return formatBytes(bytes, false)
 	},
-	"env": os.Getenv,
+	"env":          os.Getenv,
+	"toJson":       toJson,
+	"toPrettyJson": toPrettyJson,
 }
 
 // formatBytes converts an amount of bytes in a human-readable representation
@@ -106,3 +109,21 @@ func formatBytes(b uint64, decimal bool) string {
 	}
 	return fmt.Sprintf(format, float64(b)/float64(div), "kMGTPE"[exp])
 }
+
+func toJson(v interface{}) string {
+	var bytes []byte
+	var err error
+	if bytes, err = json.Marshal(v); err != nil {
+		return fmt.Sprintf("failed to marshal JSON in notification template: %v", err)
+	}
+	return string(bytes)
+}
+
+func toPrettyJson(v interface{}) string {
+	var bytes []byte
+	var err error
+	if bytes, err = json.MarshalIndent(v, "", "  "); err != nil {
+		return fmt.Sprintf("failed to marshal indent JSON in notification template: %v", err)
+	}
+	return string(bytes)
+}
diff --git a/docs/how-tos/set-up-notifications.md b/docs/how-tos/set-up-notifications.md
index ee9ffdf..4a3e979 100644
--- a/docs/how-tos/set-up-notifications.md
+++ b/docs/how-tos/set-up-notifications.md
@@ -107,6 +107,8 @@ Some formatting and helper functions are also available:
 * `formatBytesBin`: formats an amount of bytes using powers of 1024 (e.g. `7055258` bytes will be `6.7 MiB`) 
 * `formatBytesDec`: formats an amount of bytes using powers of 1000 (e.g. `7055258` bytes will be `7.1 MB`)
 * `env`: returns the value of the environment variable of the given key if set
+* `toJson`: converting object to JSON
+* `toPrettyJson`: converting object to pretty JSON
 
 ## Special characters in notification URLs