refactor

.gitignore

@@ -1,2 +1,4 @@
-release/
+sub-cli
-release.ps1
+sub-cli.exe
+
+.DS_Store

README.md

@@ -1,14 +1,13 @@
-# lrc-cli
+# sub-cli
 
-A CLI tool for LRC.
+A CLI tool for subtitle.
-See [releases](https://git.owu.one/starset-mirror/lrc-cli/releases) for binaries.
+See [releases](https://git.owu.one/starset-mirror/sub-cli/releases) for binaries.
 
 ## Usage
 
 ```shell
-./lrc-cli --help
+./sub-cli --help
 ```
 
 ## License
 AGPL-3.0
-

cmd/root.go

@@ -0,0 +1,80 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"sub-cli/internal/config"
+	"sub-cli/internal/converter"
+	"sub-cli/internal/formatter"
+	"sub-cli/internal/sync"
+)
+
+// Execute runs the main CLI application
+func Execute() {
+	// parse args
+	if len(os.Args) < 2 {
+		fmt.Println(config.Usage)
+		return
+	}
+
+	switch os.Args[1] {
+	case "sync":
+		handleSync(os.Args[2:])
+	case "convert":
+		handleConvert(os.Args[2:])
+	case "fmt":
+		handleFormat(os.Args[2:])
+	case "version":
+		fmt.Printf("sub-cli version %s\n", config.Version)
+	case "help":
+		fmt.Println(config.Usage)
+	default:
+		fmt.Println("Unknown command")
+		fmt.Println(config.Usage)
+	}
+}
+
+// handleSync handles the sync command
+func handleSync(args []string) {
+	if len(args) < 2 {
+		fmt.Println(config.SyncUsage)
+		return
+	}
+
+	sourceFile := args[0]
+	targetFile := args[1]
+
+	if err := sync.SyncLyrics(sourceFile, targetFile); err != nil {
+		fmt.Printf("Error: %v\n", err)
+	}
+}
+
+// handleConvert handles the convert command
+func handleConvert(args []string) {
+	if len(args) < 2 {
+		fmt.Println(config.ConvertUsage)
+		return
+	}
+
+	sourceFile := args[0]
+	targetFile := args[1]
+
+	if err := converter.Convert(sourceFile, targetFile); err != nil {
+		fmt.Printf("Error: %v\n", err)
+	}
+}
+
+// handleFormat handles the fmt command
+func handleFormat(args []string) {
+	if len(args) < 1 {
+		fmt.Println("Usage: sub-cli fmt <file>")
+		return
+	}
+
+	filePath := args[0]
+
+	if err := formatter.Format(filePath); err != nil {
+		fmt.Printf("Error: %v\n", err)
+	}
+}

convert.go

@@ -1,128 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-	"strings"
-)
-
-func convert(args []string) {
-	if len(args) < 2 {
-		fmt.Println(CONVERT_USAGE)
-		return
-	}
-
-	sourceFile := args[0]
-	targetFile := args[1]
-
-	sourceFmt := strings.TrimPrefix(filepath.Ext(sourceFile), ".")
-	targetFmt := strings.TrimPrefix(filepath.Ext(targetFile), ".")
-
-	switch sourceFmt {
-	case "lrc":
-		convertLyrics(sourceFile, targetFile, targetFmt)
-	case "srt":
-		convertSRT(sourceFile, targetFile, targetFmt)
-	default:
-		fmt.Printf("unsupported source file format: %s\n", sourceFmt)
-	}
-}
-
-func lrcToTxt(sourceFile, targetFile string) {
-	sourceLyrics, err := parseLyrics(sourceFile)
-	if err != nil {
-		fmt.Println("Error parsing source lyrics file:", err)
-		return
-	}
-
-	file, err := os.Create(targetFile)
-	if err != nil {
-		fmt.Println("Error creating target file:", err)
-		return
-	}
-	defer file.Close()
-
-	for _, content := range sourceLyrics.Content {
-		fmt.Fprintln(file, content)
-	}
-}
-
-func lrcToSrt(sourceFile, targetFile string) {
-	sourceLyrics, err := parseLyrics(sourceFile)
-	if err != nil {
-		fmt.Println("Error parsing source lyrics file:", err)
-		return
-	}
-
-	file, err := os.Create(targetFile)
-	if err != nil {
-		fmt.Println("Error creating target file:", err)
-		return
-	}
-	defer file.Close()
-
-	for i, content := range sourceLyrics.Content {
-		startTime := sourceLyrics.Timeline[i]
-		var endTime Timestamp
-		if i < len(sourceLyrics.Timeline)-1 {
-			endTime = sourceLyrics.Timeline[i+1]
-		} else {
-			endTime = addSeconds(startTime, 3)
-		}
-
-		fmt.Fprintf(file, "%d\n", i+1)
-		fmt.Fprintf(file, "%s --> %s\n", formatSRTTimestamp(startTime), formatSRTTimestamp(endTime))
-		fmt.Fprintf(file, "%s\n\n", content)
-	}
-}
-
-func srtToLrc(sourceFile, targetFile string) {
-	srtEntries, err := parseSRT(sourceFile)
-	if err != nil {
-		fmt.Println("Error parsing source SRT file:", err)
-		return
-	}
-
-	lyrics := Lyrics{
-		Metadata: make(map[string]string),
-		Timeline: make([]Timestamp, len(srtEntries)),
-		Content:  make([]string, len(srtEntries)),
-	}
-
-	// Add default metadata
-	title := strings.TrimSuffix(filepath.Base(targetFile), filepath.Ext(targetFile))
-	lyrics.Metadata["ti"] = title
-	lyrics.Metadata["ar"] = ""
-	lyrics.Metadata["al"] = ""
-
-	for i, entry := range srtEntries {
-		lyrics.Timeline[i] = entry.StartTime
-		lyrics.Content[i] = entry.Content
-	}
-
-	err = saveLyrics(targetFile, lyrics)
-	if err != nil {
-		fmt.Println("Error saving LRC file:", err)
-		return
-	}
-}
-
-func srtToTxt(sourceFile, targetFile string) {
-	srtEntries, err := parseSRT(sourceFile)
-	if err != nil {
-		fmt.Println("Error parsing source SRT file:", err)
-		return
-	}
-
-	file, err := os.Create(targetFile)
-	if err != nil {
-		fmt.Println("Error creating target file:", err)
-		return
-	}
-	defer file.Close()
-
-	for _, entry := range srtEntries {
-		fmt.Fprintln(file, entry.Content)
-	}
-}

internal/config/constants.go

@@ -0,0 +1,23 @@
+package config
+
+// Version stores the current application version
+const Version = "0.3.0"
+
+// Usage stores the general usage information
+const Usage = `Usage: sub-cli [command] [options]
+  Commands:
+    sync	Synchronize timeline of two lyrics files
+    convert	Convert lyrics file to another format
+    fmt		Format lyrics file
+    help	Show help`
+
+// SyncUsage stores the usage information for the sync command
+const SyncUsage = `Usage: sub-cli sync <source> <target>`
+
+// ConvertUsage stores the usage information for the convert command
+const ConvertUsage = `Usage: sub-cli convert <source> <target>
+  Note:
+  Target format is determined by file extension. Supported formats:
+    .txt	Plain text format(No meta/timeline tags, only support as target format)
+    .srt	SubRip Subtitle format
+    .lrc	LRC format`

internal/converter/converter.go

@@ -0,0 +1,137 @@
+package converter
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"sub-cli/internal/format/lrc"
+	"sub-cli/internal/format/srt"
+	"sub-cli/internal/model"
+)
+
+// ErrUnsupportedFormat is returned when trying to convert to/from an unsupported format
+var ErrUnsupportedFormat = errors.New("unsupported format")
+
+// Convert converts a file from one format to another
+func Convert(sourceFile, targetFile string) error {
+	sourceFmt := strings.TrimPrefix(filepath.Ext(sourceFile), ".")
+	targetFmt := strings.TrimPrefix(filepath.Ext(targetFile), ".")
+
+	switch sourceFmt {
+	case "lrc":
+		return convertFromLRC(sourceFile, targetFile, targetFmt)
+	case "srt":
+		return convertFromSRT(sourceFile, targetFile, targetFmt)
+	default:
+		return fmt.Errorf("%w: %s", ErrUnsupportedFormat, sourceFmt)
+	}
+}
+
+// convertFromLRC converts an LRC file to another format
+func convertFromLRC(sourceFile, targetFile, targetFmt string) error {
+	sourceLyrics, err := lrc.Parse(sourceFile)
+	if err != nil {
+		return fmt.Errorf("error parsing source LRC file: %w", err)
+	}
+
+	switch targetFmt {
+	case "txt":
+		return lrcToTxt(sourceLyrics, targetFile)
+	case "srt":
+		return lrcToSRT(sourceLyrics, targetFile)
+	case "lrc":
+		return lrc.Generate(sourceLyrics, targetFile)
+	default:
+		return fmt.Errorf("%w: %s", ErrUnsupportedFormat, targetFmt)
+	}
+}
+
+// convertFromSRT converts an SRT file to another format
+func convertFromSRT(sourceFile, targetFile, targetFmt string) error {
+	entries, err := srt.Parse(sourceFile)
+	if err != nil {
+		return fmt.Errorf("error parsing source SRT file: %w", err)
+	}
+
+	switch targetFmt {
+	case "txt":
+		return srtToTxt(entries, targetFile)
+	case "lrc":
+		lyrics := srt.ConvertToLyrics(entries)
+		return lrc.Generate(lyrics, targetFile)
+	case "srt":
+		return srt.Generate(entries, targetFile)
+	default:
+		return fmt.Errorf("%w: %s", ErrUnsupportedFormat, targetFmt)
+	}
+}
+
+// lrcToTxt converts LRC lyrics to a plain text file
+func lrcToTxt(lyrics model.Lyrics, targetFile string) error {
+	file, err := os.Create(targetFile)
+	if err != nil {
+		return fmt.Errorf("error creating target file: %w", err)
+	}
+	defer file.Close()
+
+	for _, content := range lyrics.Content {
+		if _, err := fmt.Fprintln(file, content); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// lrcToSRT converts LRC lyrics to an SRT file
+func lrcToSRT(lyrics model.Lyrics, targetFile string) error {
+	var entries []model.SRTEntry
+
+	for i, content := range lyrics.Content {
+		if i >= len(lyrics.Timeline) {
+			break
+		}
+
+		startTime := lyrics.Timeline[i]
+		endTime := startTime
+		
+		// If there's a next timeline entry, use it for end time
+		// Otherwise add a few seconds to the start time
+		if i+1 < len(lyrics.Timeline) {
+			endTime = lyrics.Timeline[i+1]
+		} else {
+			endTime.Seconds += 3
+		}
+
+		entry := model.SRTEntry{
+			Number:    i + 1,
+			StartTime: startTime,
+			EndTime:   endTime,
+			Content:   content,
+		}
+
+		entries = append(entries, entry)
+	}
+
+	return srt.Generate(entries, targetFile)
+}
+
+// srtToTxt converts SRT entries to a plain text file
+func srtToTxt(entries []model.SRTEntry, targetFile string) error {
+	file, err := os.Create(targetFile)
+	if err != nil {
+		return fmt.Errorf("error creating target file: %w", err)
+	}
+	defer file.Close()
+
+	for _, entry := range entries {
+		if _, err := fmt.Fprintln(file, entry.Content); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

internal/format/lrc/lrc.go

@@ -0,0 +1,182 @@
+package lrc
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"sub-cli/internal/model"
+)
+
+// Parse parses an LRC file and returns a Lyrics struct
+func Parse(filePath string) (model.Lyrics, error) {
+	lyrics := model.Lyrics{
+		Metadata: make(map[string]string),
+	}
+
+	file, err := os.Open(filePath)
+	if err != nil {
+		return lyrics, err
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	metadataRegex := regexp.MustCompile(`\[([\w:]+):(.*?)\]`)
+	timestampRegex := regexp.MustCompile(`\[(\d+:\d+(?:\.\d+)?)\]`)
+
+	for scanner.Scan() {
+		line := scanner.Text()
+
+		// Extract metadata
+		metadataMatches := metadataRegex.FindAllStringSubmatch(line, -1)
+		for _, match := range metadataMatches {
+			if len(match) >= 3 {
+				key := match[1]
+				value := match[2]
+				lyrics.Metadata[key] = value
+			}
+		}
+
+		// Extract timestamp and content
+		timestampMatches := timestampRegex.FindAllStringSubmatch(line, -1)
+		if len(timestampMatches) > 0 {
+			var timestamps []model.Timestamp
+			lineContent := line
+
+			for _, match := range timestampMatches {
+				if len(match) >= 2 {
+					timestamp, err := ParseTimestamp(match[1])
+					if err == nil {
+						timestamps = append(timestamps, timestamp)
+					}
+					lineContent = strings.Replace(lineContent, match[0], "", 1)
+				}
+			}
+
+			lineContent = strings.TrimSpace(lineContent)
+			if lineContent != "" {
+				for range timestamps {
+					lyrics.Timeline = append(lyrics.Timeline, timestamps...)
+					lyrics.Content = append(lyrics.Content, lineContent)
+				}
+			}
+		}
+	}
+
+	return lyrics, nil
+}
+
+// ParseTimestamp parses an LRC timestamp string into a Timestamp struct
+func ParseTimestamp(timeStr string) (model.Timestamp, error) {
+	// remove brackets
+	timeStr = strings.Trim(timeStr, "[]")
+
+	parts := strings.Split(timeStr, ":")
+	var hours, minutes, seconds, milliseconds int
+	var err error
+
+	switch len(parts) {
+	case 2: // minutes:seconds.milliseconds
+		minutes, err = strconv.Atoi(parts[0])
+		if err != nil {
+			return model.Timestamp{}, err
+		}
+		secParts := strings.Split(parts[1], ".")
+		seconds, err = strconv.Atoi(secParts[0])
+		if err != nil {
+			return model.Timestamp{}, err
+		}
+		if len(secParts) > 1 {
+			milliseconds, err = strconv.Atoi(secParts[1])
+			if err != nil {
+				return model.Timestamp{}, err
+			}
+			// adjust milliseconds based on the number of digits
+			switch len(secParts[1]) {
+			case 1:
+				milliseconds *= 100
+			case 2:
+				milliseconds *= 10
+			}
+		}
+	case 3: // hours:minutes:seconds.milliseconds
+		hours, err = strconv.Atoi(parts[0])
+		if err != nil {
+			return model.Timestamp{}, err
+		}
+		minutes, err = strconv.Atoi(parts[1])
+		if err != nil {
+			return model.Timestamp{}, err
+		}
+		secParts := strings.Split(parts[2], ".")
+		seconds, err = strconv.Atoi(secParts[0])
+		if err != nil {
+			return model.Timestamp{}, err
+		}
+		if len(secParts) > 1 {
+			milliseconds, err = strconv.Atoi(secParts[1])
+			if err != nil {
+				return model.Timestamp{}, err
+			}
+			// adjust milliseconds based on the number of digits
+			switch len(secParts[1]) {
+			case 1:
+				milliseconds *= 100
+			case 2:
+				milliseconds *= 10
+			}
+		}
+	default:
+		return model.Timestamp{}, fmt.Errorf("invalid timestamp format: %s", timeStr)
+	}
+
+	return model.Timestamp{
+		Hours:        hours,
+		Minutes:      minutes,
+		Seconds:      seconds,
+		Milliseconds: milliseconds,
+	}, nil
+}
+
+// Generate generates an LRC file from a Lyrics struct
+func Generate(lyrics model.Lyrics, filePath string) error {
+	file, err := os.Create(filePath)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	// Write metadata
+	for key, value := range lyrics.Metadata {
+		fmt.Fprintf(file, "[%s:%s]\n", key, value)
+	}
+	
+	// Write content with timestamps
+	for i, content := range lyrics.Content {
+		if i < len(lyrics.Timeline) {
+			timestamp := lyrics.Timeline[i]
+			fmt.Fprintf(file, "[%02d:%02d.%03d]%s\n", 
+				timestamp.Minutes, 
+				timestamp.Seconds, 
+				timestamp.Milliseconds,
+				content)
+		} else {
+			fmt.Fprintln(file, content)
+		}
+	}
+
+	return nil
+}
+
+// Format formats an LRC file
+func Format(filePath string) error {
+	lyrics, err := Parse(filePath)
+	if err != nil {
+		return err
+	}
+	
+	return Generate(lyrics, filePath)
+}

internal/format/srt/srt.go

@@ -0,0 +1,137 @@
+package srt
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"sub-cli/internal/model"
+)
+
+// Parse parses an SRT file and returns a slice of SRTEntries
+func Parse(filePath string) ([]model.SRTEntry, error) {
+	file, err := os.Open(filePath)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	var entries []model.SRTEntry
+	var currentEntry model.SRTEntry
+	var isContent bool
+	var contentBuffer strings.Builder
+
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+
+		if line == "" {
+			if currentEntry.Number != 0 {
+				currentEntry.Content = contentBuffer.String()
+				entries = append(entries, currentEntry)
+				currentEntry = model.SRTEntry{}
+				isContent = false
+				contentBuffer.Reset()
+			}
+			continue
+		}
+
+		if currentEntry.Number == 0 {
+			currentEntry.Number, _ = strconv.Atoi(line)
+		} else if isEntryTimeStampUnset(currentEntry) {
+			times := strings.Split(line, " --> ")
+			if len(times) == 2 {
+				currentEntry.StartTime = parseSRTTimestamp(times[0])
+				currentEntry.EndTime = parseSRTTimestamp(times[1])
+				isContent = true
+			}
+		} else if isContent {
+			if contentBuffer.Len() > 0 {
+				contentBuffer.WriteString("\n")
+			}
+			contentBuffer.WriteString(line)
+		}
+	}
+
+	// Don't forget the last entry
+	if currentEntry.Number != 0 && contentBuffer.Len() > 0 {
+		currentEntry.Content = contentBuffer.String()
+		entries = append(entries, currentEntry)
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, err
+	}
+
+	return entries, nil
+}
+
+// isEntryTimeStampUnset checks if timestamp is unset
+func isEntryTimeStampUnset(entry model.SRTEntry) bool {
+	return entry.StartTime.Hours == 0 && 
+		   entry.StartTime.Minutes == 0 && 
+		   entry.StartTime.Seconds == 0 && 
+		   entry.StartTime.Milliseconds == 0
+}
+
+// parseSRTTimestamp parses an SRT timestamp string into a Timestamp struct
+func parseSRTTimestamp(timeStr string) model.Timestamp {
+	timeStr = strings.Replace(timeStr, ",", ".", 1)
+	format := "15:04:05.000"
+	t, err := time.Parse(format, timeStr)
+	if err != nil {
+		return model.Timestamp{}
+	}
+
+	return model.Timestamp{
+		Hours:        t.Hour(),
+		Minutes:      t.Minute(),
+		Seconds:      t.Second(),
+		Milliseconds: t.Nanosecond() / 1000000,
+	}
+}
+
+// Generate generates an SRT file from a slice of SRTEntries
+func Generate(entries []model.SRTEntry, filePath string) error {
+	file, err := os.Create(filePath)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	for _, entry := range entries {
+		fmt.Fprintf(file, "%d\n", entry.Number)
+		fmt.Fprintf(file, "%s --> %s\n", 
+			formatSRTTimestamp(entry.StartTime),
+			formatSRTTimestamp(entry.EndTime))
+		fmt.Fprintf(file, "%s\n\n", entry.Content)
+	}
+
+	return nil
+}
+
+// formatSRTTimestamp formats a Timestamp struct as an SRT timestamp string
+func formatSRTTimestamp(ts model.Timestamp) string {
+	return fmt.Sprintf("%02d:%02d:%02d,%03d", 
+		ts.Hours, 
+		ts.Minutes, 
+		ts.Seconds, 
+		ts.Milliseconds)
+}
+
+// ConvertToLyrics converts SRT entries to a Lyrics structure
+func ConvertToLyrics(entries []model.SRTEntry) model.Lyrics {
+	lyrics := model.Lyrics{
+		Metadata: make(map[string]string),
+	}
+
+	for _, entry := range entries {
+		lyrics.Timeline = append(lyrics.Timeline, entry.StartTime)
+		lyrics.Content = append(lyrics.Content, entry.Content)
+	}
+
+	return lyrics
+}

internal/formatter/formatter.go

@@ -0,0 +1,21 @@
+package formatter
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+
+	"sub-cli/internal/format/lrc"
+)
+
+// Format formats a subtitle file to ensure consistent formatting
+func Format(filePath string) error {
+	ext := strings.TrimPrefix(filepath.Ext(filePath), ".")
+	
+	switch ext {
+	case "lrc":
+		return lrc.Format(filePath)
+	default:
+		return fmt.Errorf("unsupported format for formatting: %s", ext)
+	}
+}

internal/model/model.go

@@ -0,0 +1,24 @@
+package model
+
+// Timestamp represents a time in a subtitle file
+type Timestamp struct {
+	Hours        int
+	Minutes      int
+	Seconds      int
+	Milliseconds int
+}
+
+// Lyrics represents a lyrics file with metadata and content
+type Lyrics struct {
+	Metadata map[string]string
+	Timeline []Timestamp
+	Content  []string
+}
+
+// SRTEntry represents a single entry in an SRT file
+type SRTEntry struct {
+	Number    int
+	StartTime Timestamp
+	EndTime   Timestamp
+	Content   string
+}

internal/sync/sync.go

@@ -0,0 +1,79 @@
+package sync
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+
+	"sub-cli/internal/format/lrc"
+	"sub-cli/internal/model"
+)
+
+// SyncLyrics synchronizes the timeline of a source lyrics file with a target lyrics file
+func SyncLyrics(sourceFile, targetFile string) error {
+	sourceFmt := strings.TrimPrefix(filepath.Ext(sourceFile), ".")
+	targetFmt := strings.TrimPrefix(filepath.Ext(targetFile), ".")
+	
+	// Currently only supports LRC files
+	if sourceFmt != "lrc" || targetFmt != "lrc" {
+		return fmt.Errorf("sync only supports LRC files currently")
+	}
+	
+	source, err := lrc.Parse(sourceFile)
+	if err != nil {
+		return fmt.Errorf("error parsing source file: %w", err)
+	}
+	
+	target, err := lrc.Parse(targetFile)
+	if err != nil {
+		return fmt.Errorf("error parsing target file: %w", err)
+	}
+	
+	// Apply timeline from source to target
+	syncedLyrics := syncTimeline(source, target)
+	
+	// Write the synced lyrics to the target file
+	return lrc.Generate(syncedLyrics, targetFile)
+}
+
+// syncTimeline applies the timeline from the source lyrics to the target lyrics
+func syncTimeline(source, target model.Lyrics) model.Lyrics {
+	result := model.Lyrics{
+		Metadata: target.Metadata,
+		Content:  target.Content,
+	}
+	
+	// Use source timeline if available and lengths match
+	if len(source.Timeline) > 0 && len(source.Timeline) == len(target.Content) {
+		result.Timeline = source.Timeline
+	} else if len(source.Timeline) > 0 {
+		// If lengths don't match, scale timeline
+		result.Timeline = scaleTimeline(source.Timeline, len(target.Content))
+	}
+	
+	return result
+}
+
+// scaleTimeline scales a timeline to match a different number of entries
+func scaleTimeline(timeline []model.Timestamp, targetCount int) []model.Timestamp {
+	if targetCount <= 0 || len(timeline) == 0 {
+		return []model.Timestamp{}
+	}
+	
+	result := make([]model.Timestamp, targetCount)
+	
+	if targetCount == 1 {
+		result[0] = timeline[0]
+		return result
+	}
+	
+	sourceLength := len(timeline)
+	
+	for i := 0; i < targetCount; i++ {
+		// Scale index to match source timeline
+		sourceIndex := i * (sourceLength - 1) / (targetCount - 1)
+		result[i] = timeline[sourceIndex]
+	}
+	
+	return result
+}

lrc.go

@@ -1,224 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"fmt"
-	"os"
-	"regexp"
-	"strconv"
-	"strings"
-)
-
-func parseTimestamp(timeStr string) (Timestamp, error) {
-	// remove brackets
-	timeStr = strings.Trim(timeStr, "[]")
-
-	parts := strings.Split(timeStr, ":")
-	var hours, minutes, seconds, milliseconds int
-	var err error
-
-	switch len(parts) {
-	case 2: // minutes:seconds.milliseconds
-		minutes, err = strconv.Atoi(parts[0])
-		if err != nil {
-			return Timestamp{}, err
-		}
-		secParts := strings.Split(parts[1], ".")
-		seconds, err = strconv.Atoi(secParts[0])
-		if err != nil {
-			return Timestamp{}, err
-		}
-		if len(secParts) > 1 {
-			milliseconds, err = strconv.Atoi(secParts[1])
-			if err != nil {
-				return Timestamp{}, err
-			}
-			// adjust milliseconds based on the number of digits
-			switch len(secParts[1]) {
-			case 1:
-				milliseconds *= 100
-			case 2:
-				milliseconds *= 10
-			}
-		}
-	case 3: // hours:minutes:seconds.milliseconds
-		hours, err = strconv.Atoi(parts[0])
-		if err != nil {
-			return Timestamp{}, err
-		}
-		minutes, err = strconv.Atoi(parts[1])
-		if err != nil {
-			return Timestamp{}, err
-		}
-		secParts := strings.Split(parts[2], ".")
-		seconds, err = strconv.Atoi(secParts[0])
-		if err != nil {
-			return Timestamp{}, err
-		}
-		if len(secParts) > 1 {
-			milliseconds, err = strconv.Atoi(secParts[1])
-			if err != nil {
-				return Timestamp{}, err
-			}
-			// adjust milliseconds based on the number of digits
-			switch len(secParts[1]) {
-			case 1:
-				milliseconds *= 100
-			case 2:
-				milliseconds *= 10
-			}
-		}
-	default:
-		return Timestamp{}, fmt.Errorf("invalid timestamp format")
-	}
-
-	return Timestamp{Hours: hours, Minutes: minutes, Seconds: seconds, Milliseconds: milliseconds}, nil
-}
-
-func parseLyrics(filePath string) (Lyrics, error) {
-	file, err := os.Open(filePath)
-	if err != nil {
-		return Lyrics{}, err
-	}
-	defer file.Close()
-
-	scanner := bufio.NewScanner(file)
-	lyrics := Lyrics{
-		Metadata: make(map[string]string),
-	}
-	timeLineRegex := regexp.MustCompile(`\[((\d+:)?\d+:\d+(\.\d+)?)\]`)
-	tagRegex := regexp.MustCompile(`\[(\w+):(.+)\]`)
-
-	for scanner.Scan() {
-		line := scanner.Text()
-		if strings.HasPrefix(line, "[") && strings.Contains(line, "]") {
-			if timeLineRegex.MatchString(line) {
-				// Timeline
-				timeStr := timeLineRegex.FindString(line)
-				timestamp, err := parseTimestamp(timeStr)
-				if err != nil {
-					return Lyrics{}, err
-				}
-				lyrics.Timeline = append(lyrics.Timeline, timestamp)
-				// Content
-				content := timeLineRegex.ReplaceAllString(line, "")
-				lyrics.Content = append(lyrics.Content, strings.TrimSpace(content))
-			} else {
-				// Metadata
-				matches := tagRegex.FindStringSubmatch(line)
-				if len(matches) == 3 {
-					lyrics.Metadata[matches[1]] = strings.TrimSpace(matches[2])
-				}
-			}
-		}
-	}
-
-	if err := scanner.Err(); err != nil {
-		return Lyrics{}, err
-	}
-
-	return lyrics, nil
-}
-
-func saveLyrics(filePath string, lyrics Lyrics) error {
-	file, err := os.Create(filePath)
-	if err != nil {
-		return err
-	}
-	defer file.Close()
-
-	// Write metadata
-	for key, value := range lyrics.Metadata {
-		fmt.Fprintf(file, "[%s: %s]\n", key, value)
-	}
-
-	// Write timeline and content
-	for i := 0; i < len(lyrics.Timeline); i++ {
-		fmt.Fprintf(file, "%s %s\n", timestampToString(lyrics.Timeline[i]), lyrics.Content[i])
-	}
-
-	return nil
-}
-
-func syncLyrics(args []string) {
-	if len(args) < 2 {
-		fmt.Println(SYNC_USAGE)
-		return
-	}
-
-	sourceFile := args[0]
-	targetFile := args[1]
-
-	sourceLyrics, err := parseLyrics(sourceFile)
-	if err != nil {
-		fmt.Println("Error parsing source lyrics file:", err)
-		return
-	}
-
-	targetLyrics, err := parseLyrics(targetFile)
-	if err != nil {
-		fmt.Println("Error parsing target lyrics file:", err)
-		return
-	}
-
-	minLength := len(sourceLyrics.Timeline)
-	if len(targetLyrics.Timeline) < minLength {
-		minLength = len(targetLyrics.Timeline)
-		fmt.Printf("Warning: Timeline length mismatch. Source: %d lines, Target: %d lines. Will sync the first %d lines.\n",
-			len(sourceLyrics.Timeline), len(targetLyrics.Timeline), minLength)
-	}
-
-	// Sync the timeline
-	for i := 0; i < minLength; i++ {
-		targetLyrics.Timeline[i] = sourceLyrics.Timeline[i]
-	}
-
-	// save to target, name it as "<filename>_synced.lrc"
-	targetFileName := strings.TrimSuffix(targetFile, ".lrc") + "_synced.lrc"
-	err = saveLyrics(targetFileName, targetLyrics)
-	if err != nil {
-		fmt.Println("Error saving synced lyrics file:", err)
-		return
-	}
-}
-
-func convertLyrics(sourceFile, targetFile, targetFmt string) {
-	switch targetFmt {
-	case "txt":
-		lrcToTxt(sourceFile, targetFile)
-	case "srt":
-		lrcToSrt(sourceFile, targetFile)
-	default:
-		fmt.Printf("unsupported target format: %s\n", targetFmt)
-	}
-}
-
-func fmtLyrics(args []string) {
-	if len(args) < 1 {
-		fmt.Println("Usage: lyc-cli fmt <source>")
-		return
-	}
-
-	sourceFile := args[0]
-
-	sourceLyrics, err := parseLyrics(sourceFile)
-	if err != nil {
-		fmt.Println("Error parsing source lyrics file:", err)
-		return
-	}
-
-	// save to target (source_name_fmt.lrc)
-	targetFile := strings.TrimSuffix(sourceFile, ".lrc") + "_fmt.lrc"
-	err = saveLyrics(targetFile, sourceLyrics)
-	if err != nil {
-		fmt.Println("Error saving formatted lyrics file:", err)
-		return
-	}
-}
-
-func timestampToString(ts Timestamp) string {
-	if ts.Hours > 0 {
-		return fmt.Sprintf("[%02d:%02d:%02d.%03d]", ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds)
-	}
-	return fmt.Sprintf("[%02d:%02d.%03d]", ts.Minutes, ts.Seconds, ts.Milliseconds)
-}

main.go

@@ -1,29 +1,9 @@
 package main
 
 import (
-	"fmt"
+	"sub-cli/cmd"
-	"os"
 )
 
 func main() {
-	// parse args
+	cmd.Execute()
-	if len(os.Args) < 2 {
-		fmt.Println(USAGE)
-		return
-	}
-	switch os.Args[1] {
-	case "sync":
-		syncLyrics(os.Args[2:])
-	case "convert":
-		convert(os.Args[2:])
-	case "fmt":
-		fmtLyrics(os.Args[2:])
-	case "version":
-		fmt.Printf("sub-cli version %s\n", VERSION)
-	case "help":
-		fmt.Println(USAGE)
-	default:
-		fmt.Println("Unknown command")
-		fmt.Println(USAGE)
-	}
 }

model.go

@@ -1,39 +0,0 @@
-package main
-
-type Timestamp struct {
-	Hours        int
-	Minutes      int
-	Seconds      int
-	Milliseconds int
-}
-
-type Lyrics struct {
-	Metadata map[string]string
-	Timeline []Timestamp
-	Content  []string
-}
-
-type SRTEntry struct {
-	Number    int
-	StartTime Timestamp
-	EndTime   Timestamp
-	Content   string
-}
-
-const (
-	VERSION = "0.3.0"
-	USAGE   = `Usage: sub-cli [command] [options]
-  Commands:
-    sync	Synchronize timeline of two lyrics files
-    convert	Convert lyrics file to another format
-    fmt		Format lyrics file
-    help	Show help`
-
-	SYNC_USAGE    = `Usage: sub-cli sync <source> <target>`
-	CONVERT_USAGE = `Usage: sub-cli convert <source> <target>
-  Note:
-  Target format is determined by file extension. Supported formats:
-    .txt	Plain text format(No meta/timeline tags, only support as target format)
-    .srt	SubRip Subtitle format
-    .lrc	LRC format`
-)

srt.go

@@ -1,120 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"fmt"
-	"os"
-	"strconv"
-	"strings"
-	"time"
-)
-
-func parseSRT(filePath string) ([]SRTEntry, error) {
-	file, err := os.Open(filePath)
-	if err != nil {
-		return nil, err
-	}
-	defer file.Close()
-
-	scanner := bufio.NewScanner(file)
-	var entries []SRTEntry
-	var currentEntry SRTEntry
-	var isContent bool
-	var contentBuffer strings.Builder
-
-	for scanner.Scan() {
-		line := strings.TrimSpace(scanner.Text())
-
-		if line == "" {
-			if currentEntry.Number != 0 {
-				currentEntry.Content = contentBuffer.String()
-				entries = append(entries, currentEntry)
-				currentEntry = SRTEntry{}
-				isContent = false
-				contentBuffer.Reset()
-			}
-			continue
-		}
-
-		if currentEntry.Number == 0 {
-			currentEntry.Number, _ = strconv.Atoi(line)
-		} else if isEntryTimeStampUnset(currentEntry) {
-			times := strings.Split(line, " --> ")
-			if len(times) == 2 {
-				currentEntry.StartTime = parseSRTTimestamp(times[0])
-				currentEntry.EndTime = parseSRTTimestamp(times[1])
-				isContent = true
-			}
-		} else if isContent {
-			if contentBuffer.Len() > 0 {
-				contentBuffer.WriteString("\n")
-			}
-			contentBuffer.WriteString(line)
-		}
-	}
-
-	if currentEntry.Number != 0 {
-		currentEntry.Content = contentBuffer.String()
-		entries = append(entries, currentEntry)
-	}
-
-	return entries, scanner.Err()
-}
-
-func isEntryTimeStampUnset(currentEntry SRTEntry) bool {
-	return currentEntry.StartTime.Hours == 0 && currentEntry.StartTime.Minutes == 0 &&
-		currentEntry.StartTime.Seconds == 0 && currentEntry.StartTime.Milliseconds == 0 &&
-		currentEntry.EndTime.Hours == 0 && currentEntry.EndTime.Minutes == 0 &&
-		currentEntry.EndTime.Seconds == 0 && currentEntry.EndTime.Milliseconds == 0
-}
-
-func convertSRT(sourceFile, targetFile, targetFmt string) {
-	switch targetFmt {
-	case "txt":
-		srtToTxt(sourceFile, targetFile)
-	case "lrc":
-		srtToLrc(sourceFile, targetFile)
-	default:
-		fmt.Printf("unsupported target format: %s\n", targetFmt)
-	}
-}
-
-func formatSRTTimestamp(ts Timestamp) string {
-	return fmt.Sprintf("%02d:%02d:%02d,%03d", ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds)
-}
-
-func parseSRTTimestamp(timeStr string) Timestamp {
-	parts := strings.Split(timeStr, ",")
-	if len(parts) != 2 {
-		return Timestamp{}
-	}
-
-	timeParts := strings.Split(parts[0], ":")
-	if len(timeParts) != 3 {
-		return Timestamp{}
-	}
-
-	hours, _ := strconv.Atoi(timeParts[0])
-	minutes, _ := strconv.Atoi(timeParts[1])
-	seconds, _ := strconv.Atoi(timeParts[2])
-	milliseconds, _ := strconv.Atoi(parts[1])
-
-	return Timestamp{
-		Hours:        hours,
-		Minutes:      minutes,
-		Seconds:      seconds,
-		Milliseconds: milliseconds,
-	}
-}
-
-// basically for the last line of lrc
-func addSeconds(ts Timestamp, seconds int) Timestamp {
-	t := time.Date(0, 1, 1, ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds*1e6, time.UTC)
-	t = t.Add(time.Duration(seconds) * time.Second)
-	return Timestamp{
-		Hours:        t.Hour(),
-		Minutes:      t.Minute(),
-		Seconds:      t.Second(),
-		Milliseconds: t.Nanosecond() / 1e6,
-	}
-}