feat: support srt

convert.go

@@ -3,8 +3,32 @@ 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 {
@@ -23,3 +47,76 @@ func lrcToTxt(sourceFile, targetFile string) {
 		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)),
+	}
+
+	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)
+	}
+}

lrc.go

@@ -4,14 +4,13 @@ import (
 	"bufio"
 	"fmt"
 	"os"
-	"path/filepath"
 	"regexp"
 	"strconv"
 	"strings"
 )
 
 func parseTimestamp(timeStr string) (Timestamp, error) {
-	// 移除方括号
+	// remove brackets
 	timeStr = strings.Trim(timeStr, "[]")
 
 	parts := strings.Split(timeStr, ":")
@@ -19,7 +18,7 @@ func parseTimestamp(timeStr string) (Timestamp, error) {
 	var err error
 
 	switch len(parts) {
-	case 2: // 分钟:秒.毫秒
+	case 2: // minutes:seconds.milliseconds
 		minutes, err = strconv.Atoi(parts[0])
 		if err != nil {
 			return Timestamp{}, err
@@ -34,7 +33,7 @@ func parseTimestamp(timeStr string) (Timestamp, error) {
 			if err != nil {
 				return Timestamp{}, err
 			}
-			// 根据毫秒的位数调整
+			// adjust milliseconds based on the number of digits
 			switch len(secParts[1]) {
 			case 1:
 				milliseconds *= 100
@@ -42,7 +41,7 @@ func parseTimestamp(timeStr string) (Timestamp, error) {
 				milliseconds *= 10
 			}
 		}
-	case 3: // 小时:分钟:秒.毫秒
+	case 3: // hours:minutes:seconds.milliseconds
 		hours, err = strconv.Atoi(parts[0])
 		if err != nil {
 			return Timestamp{}, err
@@ -61,7 +60,7 @@ func parseTimestamp(timeStr string) (Timestamp, error) {
 			if err != nil {
 				return Timestamp{}, err
 			}
-			// 根据毫秒的位数调整
+			// adjust milliseconds based on the number of digits
 			switch len(secParts[1]) {
 			case 1:
 				milliseconds *= 100
@@ -70,7 +69,7 @@ func parseTimestamp(timeStr string) (Timestamp, error) {
 			}
 		}
 	default:
-		return Timestamp{}, fmt.Errorf("无效的时间戳格式")
+		return Timestamp{}, fmt.Errorf("invalid timestamp format")
 	}
 
 	return Timestamp{Hours: hours, Minutes: minutes, Seconds: seconds, Milliseconds: milliseconds}, nil
@@ -183,22 +182,14 @@ func syncLyrics(args []string) {
 	}
 }
 
-func convertLyrics(args []string) {
-	if len(args) < 2 {
-		fmt.Println(CONVERT_USAGE)
-		return
-	}
-
-	sourceFile := args[0]
-	targetFile := args[1]
-
-	targetFmt := strings.TrimPrefix(filepath.Ext(targetFile), ".")
-
+func convertLyrics(sourceFile, targetFile, targetFmt string) {
 	switch targetFmt {
 	case "txt":
 		lrcToTxt(sourceFile, targetFile)
+	case "srt":
+		lrcToSrt(sourceFile, targetFile)
 	default:
-		fmt.Println("Unsupported target format:", targetFmt)
+		fmt.Printf("unsupported target format: %s\n", targetFmt)
 	}
 }
 

main.go

@@ -15,7 +15,7 @@ func main() {
 	case "sync":
 		syncLyrics(os.Args[2:])
 	case "convert":
-		convertLyrics(os.Args[2:])
+		convert(os.Args[2:])
 	case "fmt":
 		fmtLyrics(os.Args[2:])
 	case "version":

model.go

@@ -13,17 +13,27 @@ type Lyrics struct {
 	Content  []string
 }
 
+type SRTEntry struct {
+	Number    int
+	StartTime Timestamp
+	EndTime   Timestamp
+	Content   string
+}
+
 const (
 	VERSION = "0.2.0"
 	USAGE   = `Usage: lyc-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: lyc-cli sync <source> <target>`
 	CONVERT_USAGE = `Usage: lyc-cli convert <source> <target>
   Note:
   Target format is determined by file extension. Supported formats:
-    .txt	Plain text format(No meta/timeline tags)`
+    .txt	Plain text format(No meta/timeline tags, only support as target format)
+    .srt	SubRip Subtitle format
+    .lrc	LRC format`
 )

srt.go

@@ -0,0 +1,86 @@
+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
+
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line == "" {
+			if currentEntry.Number != 0 {
+				entries = append(entries, currentEntry)
+				currentEntry = SRTEntry{}
+			}
+			continue
+		}
+
+		if currentEntry.Number == 0 {
+			currentEntry.Number, _ = strconv.Atoi(line)
+		} else if currentEntry.StartTime.Hours == 0 {
+			times := strings.Split(line, " --> ")
+			currentEntry.StartTime = parseSRTTimestamp(times[0])
+			currentEntry.EndTime = parseSRTTimestamp(times[1])
+		} else {
+			currentEntry.Content += line + "\n"
+		}
+	}
+
+	if currentEntry.Number != 0 {
+		entries = append(entries, currentEntry)
+	}
+
+	return entries, scanner.Err()
+}
+
+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 {
+	t, _ := time.Parse("15:04:05,000", timeStr)
+	return Timestamp{
+		Hours:        t.Hour(),
+		Minutes:      t.Minute(),
+		Seconds:      t.Second(),
+		Milliseconds: t.Nanosecond() / 1e6,
+	}
+}
+
+// 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,
+	}
+}