feat(auth): Add /token endpoint to request a access token

app/repositories/session.go

@@ -0,0 +1,62 @@
+package repositories
+
+import (
+	"encoding/json"
+
+	"git.secnex.io/secnex/masterlog"
+	"git.secnex.io/secnex/oauth2-api/cache"
+	"github.com/google/uuid"
+)
+
+type SessionDetails struct {
+	UserID    uuid.UUID `json:"user_id"`
+	Username  string    `json:"username"`
+	Email     string    `json:"email"`
+	FirstName string    `json:"first_name"`
+	LastName  string    `json:"last_name"`
+}
+
+func GetSessionCache(sessionID string) *SessionDetails {
+	masterlog.Debug("Retrieving session from cache", map[string]interface{}{"session_id": sessionID})
+	if cache.Cache.Client == nil {
+		masterlog.Debug("Redis client not initialized", map[string]interface{}{"session_id": sessionID})
+		return nil
+	}
+
+	res := cache.Cache.Client.Do(cache.Cache.Context, cache.Cache.Client.B().Get().Key(sessionID).Build())
+	if res.Error() != nil {
+		masterlog.Debug("Failed to get session from cache", map[string]interface{}{"error": res.Error(), "session_id": sessionID})
+		return nil
+	}
+
+	rawStr := res.String()
+	if rawStr == "" {
+		masterlog.Debug("Session not found in cache", map[string]interface{}{"session_id": sessionID})
+		return nil
+	}
+
+	// Parse the valkey response structure to extract the actual JSON string
+	var valkeyResponse struct {
+		Message struct {
+			Value string `json:"Value"`
+			Type  string `json:"Type"`
+		} `json:"Message"`
+	}
+	if err := json.Unmarshal([]byte(rawStr), &valkeyResponse); err != nil {
+		// If it's not the wrapped format, use it directly
+		masterlog.Debug("Cache response not in wrapped format, using directly", map[string]interface{}{"session_id": sessionID})
+	} else {
+		// Extract the actual JSON string from Message.Value
+		rawStr = valkeyResponse.Message.Value
+		masterlog.Debug("Extracted JSON from cache response", map[string]interface{}{"session_id": sessionID})
+	}
+
+	var sessionDetails SessionDetails
+	if err := json.Unmarshal([]byte(rawStr), &sessionDetails); err != nil {
+		masterlog.Debug("Failed to unmarshal session details", map[string]interface{}{"error": err.Error(), "session_id": sessionID})
+		return nil
+	}
+
+	masterlog.Debug("Session retrieved from cache", map[string]interface{}{"session_id": sessionID, "user_id": sessionDetails.UserID})
+	return &sessionDetails
+}