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package teams
import (
"bytes"
"encoding/json"
"fmt"
"net/http"
"net/url"
"strings"
"github.com/nicholas-fedor/shoutrrr/pkg/format"
"github.com/nicholas-fedor/shoutrrr/pkg/services/standard"
"github.com/nicholas-fedor/shoutrrr/pkg/types"
)
// MaxSummaryLength defines the maximum length for a notification summary.
const MaxSummaryLength = 20
// TruncatedSummaryLen defines the length for a truncated summary.
const TruncatedSummaryLen = 21
// Service sends notifications to Microsoft Teams.
type Service struct {
standard.Standard
Config *Config
pkr format.PropKeyResolver
}
// Send delivers a notification message to Microsoft Teams.
func (service *Service) Send(message string, params *types.Params) error {
config := service.Config
if err := service.pkr.UpdateConfigFromParams(config, params); err != nil {
service.Logf("Failed to update params: %v", err)
}
return service.doSend(config, message)
}
// Initialize configures the service with a URL and logger.
func (service *Service) Initialize(configURL *url.URL, logger types.StdLogger) error {
service.SetLogger(logger)
service.Config = &Config{}
service.pkr = format.NewPropKeyResolver(service.Config)
return service.Config.SetURL(configURL)
}
// GetID returns the service identifier.
func (service *Service) GetID() string {
return Scheme
}
// GetConfigURLFromCustom converts a custom URL to a service URL.
func (service *Service) GetConfigURLFromCustom(customURL *url.URL) (*url.URL, error) {
webhookURLStr := strings.TrimPrefix(customURL.String(), "teams+")
tempURL, err := url.Parse(webhookURLStr)
if err != nil {
return nil, fmt.Errorf("parsing custom URL %q: %w", webhookURLStr, err)
}
webhookURL := &url.URL{
Scheme: tempURL.Scheme,
Host: tempURL.Host,
Path: tempURL.Path,
}
config, err := ConfigFromWebhookURL(*webhookURL)
if err != nil {
return nil, err
}
config.Color = ""
config.Title = ""
query := customURL.Query()
for key, vals := range query {
if vals[0] != "" {
switch key {
case "color":
config.Color = vals[0]
case "host":
config.Host = vals[0]
case "title":
config.Title = vals[0]
}
}
}
return config.GetURL(), nil
}
// doSend sends the notification to Teams using the configured webhook URL.
func (service *Service) doSend(config *Config, message string) error {
lines := strings.Split(message, "\n")
sections := make([]section, 0, len(lines))
for _, line := range lines {
sections = append(sections, section{Text: line})
}
summary := config.Title
if summary == "" && len(sections) > 0 {
summary = sections[0].Text
if len(summary) > MaxSummaryLength {
summary = summary[:TruncatedSummaryLen]
}
}
payload, err := json.Marshal(payload{
CardType: "MessageCard",
Context: "http://schema.org/extensions",
Markdown: true,
Title: config.Title,
ThemeColor: config.Color,
Summary: summary,
Sections: sections,
})
if err != nil {
return fmt.Errorf("marshaling payload to JSON: %w", err)
}
if config.Host == "" {
return ErrMissingHost
}
postURL := BuildWebhookURL(
config.Host,
config.Group,
config.Tenant,
config.AltID,
config.GroupOwner,
config.ExtraID,
)
// Validate URL before sending
if err := ValidateWebhookURL(postURL); err != nil {
return err
}
res, err := safePost(postURL, payload)
if err != nil {
return fmt.Errorf("%w: %s", ErrSendFailed, err.Error())
}
defer res.Body.Close() // Move defer after error check
if res.StatusCode != http.StatusOK {
return fmt.Errorf("%w: %s", ErrSendFailedStatus, res.Status)
}
return nil
}
// safePost performs an HTTP POST with a pre-validated URL.
// Validation is already done; this wrapper isolates the call.
//
//nolint:gosec,noctx // Ignoring G107: Potential HTTP request made with variable url
func safePost(url string, payload []byte) (*http.Response, error) {
res, err := http.Post(url, "application/json", bytes.NewBuffer(payload))
if err != nil {
return nil, fmt.Errorf("making HTTP POST request: %w", err)
}
return res, nil
}
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