From 19193b49226bfd70049d16c5c37330300d5e4081 Mon Sep 17 00:00:00 2001
From: Adam Boutcher <adam.j.boutcher@durham.ac.uk>
Date: Tue, 14 Sep 2021 11:22:29 +0100
Subject: [PATCH] First Mattermost Test

---
 notifiers/mattermost.go | 98 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 notifiers/mattermost.go

diff --git a/notifiers/mattermost.go b/notifiers/mattermost.go
new file mode 100644
index 00000000..b5813c74
--- /dev/null
+++ b/notifiers/mattermost.go
@@ -0,0 +1,98 @@
+package notifiers
+
+import (
+	"bytes"
+	"errors"
+	"strings"
+	"time"
+
+	"github.com/statping-ng/statping-ng/types/failures"
+	"github.com/statping-ng/statping-ng/types/notifications"
+	"github.com/statping-ng/statping-ng/types/notifier"
+	"github.com/statping-ng/statping-ng/types/null"
+	"github.com/statping-ng/statping-ng/types/services"
+	"github.com/statping-ng/statping-ng/utils"
+)
+
+var _ notifier.Notifier = (*mattermost)(nil)
+
+const (
+	mattermostMethod = "mattermost"
+)
+
+type mattermost struct {
+	*notifications.Notification
+}
+
+func (s *mattermost) Select() *notifications.Notification {
+	return s.Notification
+}
+
+var mattermoster = &mattermost{&notifications.Notification{
+	Method:      mattermostMethod,
+	Title:       "Mattermost",
+	Description: "Send notifications to your mattermost channel when a service is offline. Insert your Incoming webhook URL for your channel to receive notifications. Based on the <a href=\"https://docs.mattermost.com/developer/webhooks-incoming.html\">Mattermost API</a>.",
+	Author:      "Adam Boutcher",
+	AuthorUrl:   "https://github.com/adamboutcher",
+	Delay:       time.Duration(10 * time.Second),
+	Icon:        "fab fa-comments",
+	SuccessData: null.NewNullString(`{ "blocks": [ { "type": "section", "text": { "type": "mrkdwn", "text": "The service {{.Service.Name}} is back online." } }, { "type": "actions", "elements": [ { "type": "button", "text": { "type": "plain_text", "text": "View Service", "emoji": true }, "style": "primary", "url": "{{.Core.Domain}}/service/{{.Service.Id}}" }, { "type": "button", "text": { "type": "plain_text", "text": "Go to Statping", "emoji": true }, "url": "{{.Core.Domain}}" } ] } ] }`),
+	FailureData: null.NewNullString(`{ "blocks": [ { "type": "section", "text": { "type": "mrkdwn", "text": ":warning: The service {{.Service.Name}} is currently offline! :warning:" } }, { "type": "divider" }, { "type": "section", "fields": [ { "type": "mrkdwn", "text": "*Service:*\n{{.Service.Name}}" }, { "type": "mrkdwn", "text": "*URL:*\n{{.Service.Domain}}" }, { "type": "mrkdwn", "text": "*Status Code:*\n{{.Service.LastStatusCode}}" }, { "type": "mrkdwn", "text": "*When:*\n{{.Failure.CreatedAt}}" }, { "type": "mrkdwn", "text": "*Downtime:*\n{{.Service.Downtime.Human}}" }, { "type": "plain_text", "text": "*Error:*\n{{.Failure.Issue}}" } ] }, { "type": "divider" }, { "type": "actions", "elements": [ { "type": "button", "text": { "type": "plain_text", "text": "View Offline Service", "emoji": true }, "style": "danger", "url": "{{.Core.Domain}}/service/{{.Service.Id}}" }, { "type": "button", "text": { "type": "plain_text", "text": "Go to Statping", "emoji": true }, "url": "{{.Core.Domain}}" } ] } ] }`),
+	DataType:    "json",
+	RequestInfo: "Mattermost allows you to customize your own messages with many complex components.",
+	Limits:      60,
+	Form: []notifications.NotificationForm{{
+		Type:        "text",
+		Title:       "Incoming Webhook Url",
+		Placeholder: "https://mattermost.example.com/hooks/abcd1234efgh5678ijkl9012xy",
+		SmallText:   "Incoming Webhook URL generated on your mattermost server.",
+		DbField:     "Host",
+		Required:    true,
+	}}},
+}
+
+// Send will send a HTTP Post to the slack webhooker API. It accepts type: string
+func (s *mattermost) sendMattermost(msg string) (string, error) {
+	resp, _, err := utils.HttpRequest(s.Host.String, "POST", "application/json", nil, strings.NewReader(msg), time.Duration(10*time.Second), true, nil)
+	if err != nil {
+		return "", err
+	}
+	return string(resp), nil
+}
+
+func (s *mattermost) OnTest() (string, error) {
+	example := services.Example(true)
+	testMsg := ReplaceVars(s.SuccessData.String, example, failures.Failure{})
+	contents, resp, err := utils.HttpRequest(s.Host.String, "POST", "application/json", nil, bytes.NewBuffer([]byte(testMsg)), time.Duration(10*time.Second), true, nil)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+	if string(contents) != "ok" {
+		return string(contents), errors.New("the mattermost response was incorrect, check the URL")
+	}
+	return string(contents), nil
+}
+
+// OnFailure will trigger failing service
+func (s *mattermost) OnFailure(srv services.Service, f failures.Failure) (string, error) {
+	msg := ReplaceVars(s.FailureData.String, srv, f)
+	out, err := s.sendMattermost(msg)
+	return out, err
+}
+
+// OnSuccess will trigger successful service
+func (s *mattermost) OnSuccess(srv services.Service) (string, error) {
+	msg := ReplaceVars(s.SuccessData.String, srv, failures.Failure{})
+	out, err := s.sendMattermost(msg)
+	return out, err
+}
+
+// OnSave will trigger when this notifier is saved
+func (s *mattermost) OnSave() (string, error) {
+	return "", nil
+}
+
+func (s *mattermost) Valid(values notifications.Values) error {
+	return nil
+}