all: implement notification using Mattermost incoming webhook

In the server configuration, one can defined the following section
to send the notification using Mattermost,

[notif]
kind = mattermost
webhook_url = # The incoming webhook URL.
channel = # The channel where the notification will be placed.
down_template = # Message template when service is down.
up_template = # Message template when service is up.

1 files changed, 81 insertions, 0 deletions

diff --git a/server_config_test.go b/server_config_test.go
new file mode 100644
index 0000000..bb30e5c
--- /dev/null
+++ b/server_config_test.go
@@ -0,0 +1,81 @@
+// SPDX-FileCopyrightText: 2025 M. Shulhan <ms@kilabit.info>
+// SPDX-License-Identifier: GPL-3.0-only
+
+package lilin
+
+import (
+	"net/url"
+	"testing"
+
+	"git.sr.ht/~shulhan/pakakeh.go/lib/test"
+)
+
+func TestServerConfig_init(t *testing.T) {
+	type testCase struct {
+		baseDir string
+		exp     ServerConfig
+	}
+
+	var webhookURL12000 *url.URL
+	var webhookURL12001 *url.URL
+	var err error
+
+	webhookURL12000, err = url.Parse(`http://127.0.0.1:12000`)
+	if err != nil {
+		t.Fatal(err)
+	}
+	webhookURL12001, err = url.Parse(`http://127.0.0.1:12001`)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var listCase = []testCase{{
+		baseDir: `testdata/server_config/ok/`,
+		exp: ServerConfig{
+			BaseDir:          `testdata/server_config/ok/`,
+			configDir:        `testdata/server_config/ok/etc/lilin`,
+			configServiceDir: `testdata/server_config/ok/etc/lilin/service.d`,
+			logServiceDir:    `testdata/server_config/ok/var/log/lilin/service.d`,
+			Address:          `127.0.0.1:12121`,
+			Notifs: []*NotifConfig{{
+				Kind:         `mattermost`,
+				WebhookURL:   `http://127.0.0.1:12000`,
+				Channel:      `chan_1`,
+				UpTemplate:   `Service {{.ID}} is up again!`,
+				DownTemplate: `Service {{.ID}} is down: {{.Error}}`,
+				webhookURL:   webhookURL12000,
+			}, {
+				Kind:         `mattermost`,
+				WebhookURL:   `http://127.0.0.1:12001`,
+				Channel:      `chan_2`,
+				UpTemplate:   `Service {{.ID}} is alive!`,
+				DownTemplate: `Service {{.ID}} is down: {{.Error}}`,
+				webhookURL:   webhookURL12001,
+			}},
+		},
+	}}
+
+	for _, tcase := range listCase {
+		var cfg = ServerConfig{
+			BaseDir: tcase.baseDir,
+		}
+
+		var err = cfg.init()
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		for x, notifCfg := range cfg.Notifs {
+			if notifCfg.upTmpl == nil {
+				t.Fatalf(`ServerConfig.Notifs #%d: upTmpl is nil`, x)
+			}
+			if notifCfg.downTmpl == nil {
+				t.Fatalf(`ServerConfig.Notifs #%d: downTmpl is nil`, x)
+			}
+			notifCfg.upTmpl = nil
+			notifCfg.downTmpl = nil
+		}
+
+		test.Assert(t, tcase.baseDir, tcase.exp, cfg)
+	}
+}