implement wasm/js specific database engine

pkg/wasmdb/logger.go

@@ -0,0 +1,75 @@
+//go:build js && wasm
+
+package wasmdb
+
+import (
+	"fmt"
+	"syscall/js"
+	"time"
+
+	"lol.mleku.dev"
+)
+
+// logger provides logging functionality for the wasmdb package
+// It outputs to the browser console via console.log/warn/error
+type logger struct {
+	level int
+}
+
+// NewLogger creates a new logger with the specified level
+func NewLogger(level int) *logger {
+	return &logger{level: level}
+}
+
+// SetLogLevel changes the logging level
+func (l *logger) SetLogLevel(level int) {
+	l.level = level
+}
+
+// formatMessage creates a formatted log message with timestamp
+func (l *logger) formatMessage(level, format string, args ...interface{}) string {
+	msg := fmt.Sprintf(format, args...)
+	return fmt.Sprintf("[%s] [wasmdb] [%s] %s",
+		time.Now().Format("15:04:05.000"),
+		level,
+		msg,
+	)
+}
+
+// Debugf logs a debug message
+func (l *logger) Debugf(format string, args ...interface{}) {
+	if l.level <= lol.Debug {
+		msg := l.formatMessage("DEBUG", format, args...)
+		js.Global().Get("console").Call("log", msg)
+	}
+}
+
+// Infof logs an info message
+func (l *logger) Infof(format string, args ...interface{}) {
+	if l.level <= lol.Info {
+		msg := l.formatMessage("INFO", format, args...)
+		js.Global().Get("console").Call("log", msg)
+	}
+}
+
+// Warnf logs a warning message
+func (l *logger) Warnf(format string, args ...interface{}) {
+	if l.level <= lol.Warn {
+		msg := l.formatMessage("WARN", format, args...)
+		js.Global().Get("console").Call("warn", msg)
+	}
+}
+
+// Errorf logs an error message
+func (l *logger) Errorf(format string, args ...interface{}) {
+	if l.level <= lol.Error {
+		msg := l.formatMessage("ERROR", format, args...)
+		js.Global().Get("console").Call("error", msg)
+	}
+}
+
+// Fatalf logs a fatal message (does not exit in WASM)
+func (l *logger) Fatalf(format string, args ...interface{}) {
+	msg := l.formatMessage("FATAL", format, args...)
+	js.Global().Get("console").Call("error", msg)
+}