Adding upstream version 0.8.9.

Signed-off-by: Daniel Baumann <daniel@debian.org>

pkg/services/googlechat/googlechat.go

@@ -0,0 +1,87 @@
+package googlechat
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"net/url"
+
+	"github.com/nicholas-fedor/shoutrrr/pkg/services/standard"
+	"github.com/nicholas-fedor/shoutrrr/pkg/types"
+)
+
+// ErrUnexpectedStatus indicates an unexpected HTTP status code from the Google Chat API.
+var ErrUnexpectedStatus = errors.New("google chat api returned unexpected http status code")
+
+// Service implements a Google Chat notification service.
+type Service struct {
+	standard.Standard
+	Config *Config
+}
+
+// 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{}
+
+	return service.Config.SetURL(configURL)
+}
+
+// GetID returns the identifier for this service.
+func (service *Service) GetID() string {
+	return Scheme
+}
+
+// Send delivers a notification message to Google Chat.
+func (service *Service) Send(message string, _ *types.Params) error {
+	config := service.Config
+
+	jsonBody, err := json.Marshal(JSON{Text: message})
+	if err != nil {
+		return fmt.Errorf("marshaling message to JSON: %w", err)
+	}
+
+	postURL := getAPIURL(config)
+	jsonBuffer := bytes.NewBuffer(jsonBody)
+
+	req, err := http.NewRequestWithContext(
+		context.Background(),
+		http.MethodPost,
+		postURL.String(),
+		jsonBuffer,
+	)
+	if err != nil {
+		return fmt.Errorf("creating HTTP request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("sending notification to Google Chat: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return fmt.Errorf("%w: %d", ErrUnexpectedStatus, resp.StatusCode)
+	}
+
+	return nil
+}
+
+// getAPIURL constructs the API URL for Google Chat notifications.
+func getAPIURL(config *Config) *url.URL {
+	query := url.Values{}
+	query.Set("key", config.Key)
+	query.Set("token", config.Token)
+
+	return &url.URL{
+		Path:     config.Path,
+		Host:     config.Host,
+		Scheme:   "https",
+		RawQuery: query.Encode(),
+	}
+}