Add dependencies/vendor (whatsapp)

vendor/go.mau.fi/libsignal/logger/Logger.go

@@ -0,0 +1,89 @@
+// Package logger provides optional debug logging of the Signal library.
+package logger
+
+import (
+	"fmt"
+	"runtime"
+	"strconv"
+	"strings"
+)
+
+// Logger is a shared loggable interface that this library will use for all log messages.
+var Logger Loggable
+
+// Loggable is an interface for logging.
+type Loggable interface {
+	Debug(caller, message string)
+	Info(caller, message string)
+	Warning(caller, message string)
+	Error(caller, message string)
+	Configure(settings string)
+}
+
+// Setup will configure the shared logger to use the provided logger.
+func Setup(logger *Loggable) {
+	Logger = *logger
+}
+
+// ToString converts an arbitrary number of objects to a string for use in a logger.
+func toString(a ...interface{}) string {
+	return fmt.Sprint(a...)
+}
+
+// EnsureLogger will use the default logger if one was not set up.
+func ensureLogger() {
+	if Logger == nil {
+		// fmt.Println("Error: No logger was configured. Use `logger.Setup` to configure a logger.")
+		Logger = &defaultLogger{}
+	}
+}
+
+// GetCaller gets the go file name and line number that the logger was called from.
+func getCaller() string {
+	var file string
+	_, path, line, _ := runtime.Caller(2)
+	paths := strings.Split(path, "/")
+	if len(paths) > 0 {
+		file = paths[len(paths)-1]
+	} else {
+		file = "<unkn>"
+	}
+
+	return file + ":" + strconv.Itoa(line)
+}
+
+/*
+ * Go methods used by the library for logging.
+ */
+
+// Debug prints debug level logs.
+func Debug(msg ...interface{}) {
+	ensureLogger()
+	Logger.Debug(getCaller(), toString(msg...))
+}
+
+// Info prints info level logs.
+func Info(msg ...interface{}) {
+	ensureLogger()
+	Logger.Info(getCaller(), toString(msg...))
+}
+
+// Warning prints warning level logs.
+func Warning(msg ...interface{}) {
+	ensureLogger()
+	Logger.Warning(getCaller(), toString(msg...))
+}
+
+// Error prints error level logs.
+func Error(msg ...interface{}) {
+	ensureLogger()
+	Logger.Error(getCaller(), toString(msg...))
+}
+
+// Configure allows arbitrary logger configuration settings. The
+// default logger uses this method to configure what Go files
+// are allowed to log.
+func Configure(settings string) {
+	ensureLogger()
+	Logger.Configure(settings)
+}