refactor: use wrapper functions instead of variable assignments

logger/logger.go

@@ -1,13 +1,20 @@
 package logger
 
 import (
+	"context"
+	"log/slog"
+	"net/http"
+
 	"github.com/lvlcn-t/loggerhead/internal/logger"
 )
 
 // Logger is the interface for the logger.
 // Its build on top of slog.Logger and extends it with additional logging methods.
 type Logger = logger.Logger
 
+// Level is the type for log levels.
+type Level logger.Level
+
 // NewLogger creates a new Logger instance.
 // If handlers are provided, the first handler in the slice is used; otherwise,
 // a default JSON handler writing to os.Stderr is used. This function allows for
@@ -17,28 +24,40 @@ type Logger = logger.Logger
 //
 //	log := logger.NewLogger()
 //	log.Info("Hello, world!")
-var NewLogger = logger.NewLogger
+func NewLogger(h ...slog.Handler) logger.Logger {
+	return logger.NewLogger(h...)
+}
 
 // NewNamedLogger creates a new Logger instance with the provided name.
 // If handlers are provided, the first handler in the slice is used; otherwise,
 // a default JSON handler writing to os.Stderr is used. This function allows for
 // custom configuration of logging handlers.
-var NewNamedLogger = logger.NewNamedLogger
+func NewNamedLogger(name string, h ...slog.Handler) logger.Logger {
+	return logger.NewNamedLogger(name, h...)
+}
 
 // NewContextWithLogger creates a new context based on the provided parent context.
 // It embeds a logger into this new context, which is a child of the logger from the parent context.
 // The child logger inherits settings from the parent.
 // Returns the child context and its cancel function to cancel the new context.
-var NewContextWithLogger = logger.NewContextWithLogger
+func NewContextWithLogger(parent context.Context) (context.Context, context.CancelFunc) {
+	return logger.NewContextWithLogger(parent)
+}
 
 // IntoContext embeds the provided slog.Logger into the given context and returns the modified context.
 // This function is used for passing loggers through context, allowing for context-aware logging.
-var IntoContext = logger.IntoContext
+func IntoContext(ctx context.Context, log logger.Logger) context.Context {
+	return logger.IntoContext(ctx, log)
+}
 
 // FromContext extracts the slog.Logger from the provided context.
 // If the context does not have a logger, it returns a new logger with the default configuration.
 // This function is useful for retrieving loggers from context in different parts of an application.
-var FromContext = logger.FromContext
+func FromContext(ctx context.Context) logger.Logger {
+	return logger.FromContext(ctx)
+}
 
 // Middleware takes the logger from the context and adds it to the request context.
-var Middleware = logger.Middleware
+func Middleware(ctx context.Context) func(http.Handler) http.Handler {
+	return logger.Middleware(ctx)
+}