131 lines
2.7 KiB
Go
131 lines
2.7 KiB
Go
// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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// For more tutorials : https://learngoprogramming.com
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// In-person training : https://www.linkedin.com/in/inancgumus/
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// Follow me on twitter: https://twitter.com/inancgumus
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// ---------------------------------------------------------
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// EXERCISE: Refactor the game store to funcs - step #2
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//
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// Let's continue the refactoring from the previous
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// exercise. This time, you're going to refactor the
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// command handling logic.
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//
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//
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// Create commands.go file
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//
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// 1- Add a func that runs the given command from the user:
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//
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// Name : runCmd
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// Inputs: input string, []game, map[int]game
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// Output: bool
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//
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// This func returns true if it wants the program to
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// continue. When it returns false, the program will
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// terminate. So, all the commands that it calls need
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// to return true or false as well depending on whether
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// they want to cause the program to terminate or not.
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//
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// 2- Add a func that handles the quit command:
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//
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// Name : cmdQuit
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// Input : none
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// Output: bool
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//
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// 3- Add a func that handles the list command:
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//
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// Name : cmdList
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// Inputs: []game
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// Output: bool
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//
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// 4- Add a func that handles the id command:
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//
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// Name : cmdByID
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// Inputs: cmd []string, []game, map[int]game
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// Output: bool
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//
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// 5- Refactor the runCmd() with the cmdXXX funcs.
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//
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// Go back to main.go and change the existing code with
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// the new funcs that you've created. There are hints
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// inside the code.
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//
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// ---------------------------------------------------------
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package main
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import (
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"bufio"
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"fmt"
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"os"
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"strconv"
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"strings"
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)
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func main() {
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games := load()
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byID := indexByID(games)
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fmt.Printf("Inanc's game store has %d games.\n", len(games))
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in := bufio.NewScanner(os.Stdin)
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for {
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// menu()
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fmt.Printf(`
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> list : lists all the games
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> id N : queries a game by id
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> quit : quits
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`)
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if !in.Scan() {
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break
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}
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// --- runCmd start ---
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fmt.Println()
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cmd := strings.Fields(in.Text())
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if len(cmd) == 0 {
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continue
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}
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switch cmd[0] {
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case "quit":
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// cmdQuit()
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fmt.Println("bye!")
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return
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case "list":
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// cmdList()
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for _, g := range games {
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printGame(g)
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}
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case "id":
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// cmdByID
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if len(cmd) != 2 {
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fmt.Println("wrong id")
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continue
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}
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id, err := strconv.Atoi(cmd[1])
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if err != nil {
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fmt.Println("wrong id")
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continue
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}
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g, ok := byID[id]
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if !ok {
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fmt.Println("sorry. I don't have the game")
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continue
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}
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printGame(g)
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}
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// --- runCmd end ---
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}
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}
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