1. /**
    2. @author CuiZhouwei
    3. @date 2022/7/29
    4. **/
    6. package main
    8. import (
    9.     "bufio"
    10.     "fmt"
    11.     "os"
    12.     "strconv"
    13.     "strings"
    15.     "xushiwei-book/music/library"
    16.     "xushiwei-book/music/play"
    17. )
    19. var lib *library.MusicManager
    21. var id int = 0
    23. func main() {
    24.     fmt.Println(`Enter following commands to control the player:
    26. lib list                             --View the existing music lib
    28. lib add <name><artis><source><type>  --Add a music to the music lib,the music type can use MP3 or WAV
    30. lib remove <name>                    --Remove the specified music by it name from the music lib 
    32. play <name>                          --Play the specified music by it name
    34. q | e                                --quit or exit
    36. `)
    38.     lib = library.NewMusicManager()
    40.     r := bufio.NewReader(os.Stdin)
    42.     for {
    43.         fmt.Println("Enter command ->")
    44.         rawline, _, _ := r.ReadLine()
    45.         line := string(rawline)
    46.         if line == "q" || line == "e" {
    47.             break
    48.         }
    49.         tokens := strings.Split(line, " ")
    50.         if tokens[0] == "lib" {
    51.             handleCommands(tokens)
    52.         } else if tokens[0] == "play" {
    53.             handlePlay(tokens)
    54.         } else {
    55.             fmt.Println("Unrecognized command", tokens[0])
    56.         }
    57.     }
    59. }
    61. func handleCommands(tokens []string) {
    62.     if len(tokens) < 2 {
    63.         fmt.Println(` 
    65.       Enter following commands to control the player: 
    67.       lib list                             -- View the existing music lib 
    69.       lib add <name><artist><source><type> -- Add a music to the music lib ,the music type can use MP3 or WAV
    71.       lib remove name                      -- Remove the specified music by it name from the lib 
    73.       `)
    74.         return
    75.     }
    77.     switch tokens[1] {
    78.     case "list":
    79.         fmt.Println("序号   id       歌名        作者          路径                  类型")
    80.         for i := 0; i < lib.Len(); i++ {
    81.             e, err := lib.Get(i)
    82.             if err != nil {
    83.                 fmt.Println("get music err")
    84.             }
    85.             fmt.Printf("%-4d   %-8s %-10s  %-12s  %-20s  %-5s\n", i+1, e.Id, e.Name, e.Artist, e.Source, e.Type)
    86.         }
    87.     case "add":
    88.         if len(tokens) == 6 {
    89.             id++
    90.             lib.Add(&library.Music{
    91.                 Id:     strconv.Itoa(id),
    92.                 Name:   tokens[2],
    93.                 Artist: tokens[3],
    94.                 Source: tokens[4],
    95.                 Type:   tokens[5],
    96.             })
    97.             fmt.Printf("add music %s success\n", tokens[2])
    98.         } else {
    99.             fmt.Println("USAGE:lib add <name><artist><source><type>")
    100.         }
    101.     case "remove":
    102.         if len(tokens) == 3 {
    103.             fmt.Println("music_id  歌名        作者          路径                           类型")
    104.             _, e := lib.Find(tokens[2])
    105.             if e == nil {
    106.                 fmt.Println("this music not in lib,add it to lib")
    107.                 return
    108.             }
    109.             fmt.Printf("%-8s  %-10s  %-12s  %-20s           %-5s\n", e.Id, e.Name, e.Artist, e.Source, e.Type)
    110.             lib.RemoveByName(tokens[2])
    111.         } else {
    112.             fmt.Println("USAGE:lib remove <name>")
    113.         }
    114.     default:
    115.         fmt.Println("unrecongized lib command:", tokens[1])
    117.     }
    118. }
    120. func handlePlay(tokens []string) {
    121.     if len(tokens) != 2 {
    122.         fmt.Println("USAGE:play <name>")
    123.         return
    124.     }
    125.     _, e := lib.Find(tokens[1])
    126.     if e == nil {
    127.         fmt.Println("The music ", tokens[1], "does not exist.")
    128.         return
    129.     }
    130.     play.PlayAll(e.Source, e.Type, e.Name)
    131. }