Remove library & refactor cli

commands/logger.go

@@ -0,0 +1,193 @@
+package commands
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"runtime"
+	"strings"
+	"sync"
+	"time"
+)
+
+var prefix, progressDown, progressDownFinish string
+
+func initPrefixBecauseWindowsSucksBallsHard() {
+	// dear windows user, please change to a good OS, linux in the best case.
+	// MICROSHIT DOES NOT GET IT DONE TO SHOW THE SYMBOLS IN THE ELSE CLAUSE
+	// CORRECTLY. NOT IN THE CMD NOR POWERSHELL. WHY TF, IT IS ONE OF THE MOST
+	// PROFITABLE COMPANIES ON THIS PLANET AND CANNOT SHOW A PROPER UTF-8 SYMBOL
+	// IN THEIR OWN PRODUCT WHICH GETS USED MILLION TIMES A DAY
+	if runtime.GOOS == "windows" {
+		prefix = "=>"
+		progressDown = "|"
+		progressDownFinish = "->"
+	} else {
+		prefix = "➞"
+		progressDown = "↓"
+		progressDownFinish = "↳"
+	}
+}
+
+type progress struct {
+	message string
+	stop    bool
+}
+
+type logger struct {
+	DebugLog *log.Logger
+	InfoLog  *log.Logger
+	ErrLog   *log.Logger
+
+	devView bool
+
+	progress chan progress
+	done     chan interface{}
+	lock     sync.Mutex
+}
+
+func newLogger(debug, info, err bool) *logger {
+	initPrefixBecauseWindowsSucksBallsHard()
+
+	debugLog, infoLog, errLog := log.New(io.Discard, prefix+" ", 0), log.New(io.Discard, prefix+" ", 0), log.New(io.Discard, prefix+" ", 0)
+
+	if debug {
+		debugLog.SetOutput(os.Stdout)
+	}
+	if info {
+		infoLog.SetOutput(os.Stdout)
+	}
+	if err {
+		errLog.SetOutput(os.Stderr)
+	}
+
+	if debug {
+		debugLog = log.New(debugLog.Writer(), "[debug] ", 0)
+		infoLog = log.New(infoLog.Writer(), "[info] ", 0)
+		errLog = log.New(errLog.Writer(), "[err] ", 0)
+	}
+
+	return &logger{
+		DebugLog: debugLog,
+		InfoLog:  infoLog,
+		ErrLog:   errLog,
+
+		devView: debug,
+	}
+}
+
+func (l *logger) IsDev() bool {
+	return l.devView
+}
+
+func (l *logger) IsQuiet() bool {
+	return l.DebugLog.Writer() == io.Discard && l.InfoLog.Writer() == io.Discard && l.ErrLog.Writer() == io.Discard
+}
+
+func (l *logger) Debug(format string, v ...interface{}) {
+	l.DebugLog.Printf(format, v...)
+}
+
+func (l *logger) Info(format string, v ...interface{}) {
+	l.InfoLog.Printf(format, v...)
+}
+
+func (l *logger) Err(format string, v ...interface{}) {
+	l.ErrLog.Printf(format, v...)
+}
+
+func (l *logger) Exit(format string, v ...interface{}) {
+	fmt.Fprintln(l.ErrLog.Writer(), fmt.Sprintf(format, v...))
+}
+
+func (l *logger) Empty() {
+	if !l.devView && l.InfoLog.Writer() != io.Discard {
+		fmt.Println("")
+	}
+}
+
+func (l *logger) SetProgress(format string, v ...interface{}) {
+	if out.InfoLog.Writer() == io.Discard {
+		return
+	} else if l.devView {
+		l.Debug(format, v...)
+		return
+	}
+
+	initialMessage := fmt.Sprintf(format, v...)
+
+	p := progress{
+		message: initialMessage,
+	}
+
+	l.lock.Lock()
+	if l.done != nil {
+		l.progress <- p
+		return
+	} else {
+		l.progress = make(chan progress, 1)
+		l.progress <- p
+		l.done = make(chan interface{})
+	}
+
+	go func() {
+		states := []string{"-", "\\", "|", "/"}
+
+		var count int
+
+		for i := 0; ; i++ {
+			select {
+			case p := <-l.progress:
+				if p.stop {
+					fmt.Printf("\r" + strings.Repeat(" ", len(prefix)+len(initialMessage)))
+					if count > 1 {
+						fmt.Printf("\r%s %s\n", progressDownFinish, p.message)
+					} else {
+						fmt.Printf("\r%s %s\n", prefix, p.message)
+					}
+
+					if l.done != nil {
+						l.done <- nil
+					}
+					l.progress = nil
+
+					l.lock.Unlock()
+					return
+				} else {
+					if count > 0 {
+						fmt.Printf("\r%s %s\n", progressDown, p.message)
+					}
+					l.progress = make(chan progress, 1)
+
+					count++
+
+					fmt.Printf("\r%s %s", states[i/10%4], initialMessage)
+					l.lock.Unlock()
+				}
+			default:
+				if i%10 == 0 {
+					fmt.Printf("\r%s %s", states[i/10%4], initialMessage)
+				}
+				time.Sleep(35 * time.Millisecond)
+			}
+		}
+	}()
+}
+
+func (l *logger) StopProgress(format string, v ...interface{}) {
+	if out.InfoLog.Writer() == io.Discard {
+		return
+	} else if l.devView {
+		l.Debug(format, v...)
+		return
+	}
+
+	l.lock.Lock()
+	l.progress <- progress{
+		message: fmt.Sprintf(format, v...),
+		stop:    true,
+	}
+	<-l.done
+	l.done = nil
+}