feat: implemented service/transport/main layers

internal/pkg/ds/predictor.go

@@ -0,0 +1,7 @@
+package ds
+
+type PredictionParameters struct {
+}
+
+type PredicitonResult struct {
+}

internal/pkg/errcodes/errcodes.go

@@ -0,0 +1,25 @@
+package errcodes
+
+import (
+	"strings"
+)
+
+type ErrorCode struct {
+	StatusCode int
+	Message    string
+	Details    string
+}
+
+var errorCodeCounter int32
+
+func New(statusCode int, message string, details ...string) *ErrorCode {
+	return &ErrorCode{
+		StatusCode: statusCode,
+		Message:    message,
+		Details:    strings.Join(details, " "),
+	}
+}
+
+func (e *ErrorCode) Error() string {
+	return e.Message
+}

internal/pkg/log/log.go

@@ -0,0 +1,23 @@
+package log
+
+import (
+	"context"
+
+	"go.uber.org/zap"
+)
+
+type ctxLogKey struct{}
+
+func ToCtx(ctx context.Context, lg *zap.Logger) context.Context {
+	return context.WithValue(ctx, ctxLogKey{}, lg)
+}
+
+func Ctx(ctx context.Context) *zap.Logger {
+	lg, ok := ctx.Value(ctxLogKey{}).(*zap.Logger)
+	if !ok || lg == nil {
+		zap.L().Error("no logger in context, using global")
+		return zap.L()
+	}
+
+	return lg
+}