log stuff added

logs/lokiwriter.go

@@ -0,0 +1,97 @@
+package logs
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+type LokiWriter struct {
+	url        string
+	labels     map[string]string
+	httpClient *http.Client
+}
+
+type LokiPayload struct {
+	Streams []LokiStream `json:"streams"`
+}
+
+type LokiStream struct {
+	Stream map[string]string `json:"stream"`
+	Values [][]string        `json:"values"`
+}
+
+func NewLokiWriter(url string, labels map[string]string) *LokiWriter {
+	return &LokiWriter{
+		url:        url,
+		labels:     labels,
+		httpClient: &http.Client{},
+	}
+}
+
+func (w *LokiWriter) Write(p []byte) (n int, err error) {
+	// Use zerolog to parse the log level
+	var event map[string]interface{}
+	if err := json.Unmarshal(p, &event); err != nil {
+		return 0, fmt.Errorf("failed to unmarshal log event: %w", err)
+	}
+
+	level := ""
+	if l, ok := event["level"].(string); ok {
+		level = l
+	}
+
+	message := ""
+	if m, ok := event["message"].(string); ok {
+		message = m
+	}
+
+	// Add log level to labels
+	labels := make(map[string]string)
+	for k, v := range w.labels {
+		labels[k] = v
+	}
+	labels["level"] = level
+
+	// Format the timestamp in nanoseconds
+	timestamp := fmt.Sprintf("%d000000", time.Now().UnixNano()/int64(time.Millisecond))
+
+	stream := LokiStream{
+		Stream: labels,
+		Values: [][]string{
+			{timestamp, message},
+		},
+	}
+
+	payload := LokiPayload{
+		Streams: []LokiStream{stream},
+	}
+
+	payloadBytes, err := json.Marshal(payload)
+	if err != nil {
+		return 0, fmt.Errorf("failed to marshal payload: %w", err)
+	}
+
+	//fmt.Printf("Sending payload to Loki: %s\n", string(payloadBytes))
+
+	req, err := http.NewRequest("POST", w.url, bytes.NewReader(payloadBytes))
+	if err != nil {
+		return 0, fmt.Errorf("failed to create HTTP request: %w", err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := w.httpClient.Do(req)
+	if err != nil {
+		return 0, fmt.Errorf("failed to send log to Loki: %w", err)
+	}
+	defer resp.Body.Close()
+
+	//fmt.Printf("Loki response status: %d\n", resp.StatusCode)
+	if resp.StatusCode != http.StatusNoContent {
+		return 0, fmt.Errorf("received non-204 response from Loki: %d", resp.StatusCode)
+	}
+
+	return len(p), nil
+}