mirror of
https://github.com/unidoc/unipdf.git
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88 lines
2.1 KiB
Go
88 lines
2.1 KiB
Go
/*
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* This file is subject to the terms and conditions defined in
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* file 'LICENSE.md', which is part of this source code package.
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*/
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package common
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import (
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"fmt"
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"os"
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"path/filepath"
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"runtime"
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)
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type Logger interface {
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Error(format string, args ...interface{})
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Warning(format string, args ...interface{})
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Notice(format string, args ...interface{})
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Info(format string, args ...interface{})
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Debug(format string, args ...interface{})
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}
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// Dummy Logger does nothing.
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type DummyLogger struct{}
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func (this DummyLogger) Error(format string, args ...interface{}) {
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}
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func (this DummyLogger) Warning(format string, args ...interface{}) {
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}
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func (this DummyLogger) Notice(format string, args ...interface{}) {
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}
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func (this DummyLogger) Info(format string, args ...interface{}) {
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}
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func (this DummyLogger) Debug(format string, args ...interface{}) {
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}
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// Simple Console Logger that the tests use.
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type ConsoleLogger struct{}
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func (this ConsoleLogger) Error(format string, args ...interface{}) {
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prefix := "[ERROR] "
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this.output(os.Stdout, prefix, format, args...)
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}
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func (this ConsoleLogger) Warning(format string, args ...interface{}) {
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prefix := "[WARNING] "
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this.output(os.Stdout, prefix, format, args...)
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}
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func (this ConsoleLogger) Notice(format string, args ...interface{}) {
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prefix := "[NOTICE] "
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this.output(os.Stdout, prefix, format, args...)
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}
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func (this ConsoleLogger) Info(format string, args ...interface{}) {
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prefix := "[INFO] "
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this.output(os.Stdout, prefix, format, args...)
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}
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func (this ConsoleLogger) Debug(format string, args ...interface{}) {
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prefix := "[DEBUG] "
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this.output(os.Stdout, prefix, format, args...)
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}
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var Log Logger = DummyLogger{}
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func SetLogger(logger Logger) {
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Log = logger
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}
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// output writes `format`, `args` log message prefixed by the source file name, line and `prefix`
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func (this ConsoleLogger) output(f *os.File, prefix string, format string, args ...interface{}) {
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_, file, line, ok := runtime.Caller(3)
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if !ok {
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file = "???"
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line = 0
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} else {
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file = filepath.Base(file)
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}
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src := fmt.Sprintf("%s %s:%d ", prefix, file, line) + format + "\n"
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fmt.Fprintf(f, src, args...)
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}
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