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| 1 | // tasks is a tiny to-do list for the terminal. |
| 2 | // |
| 3 | // tasks add Buy milk add a task |
| 4 | // tasks list open tasks |
| 5 | // tasks done 2 mark task 2 as done |
| 6 | // tasks all list every task, including done ones |
| 7 | // tasks clear remove done tasks |
| 8 | package main |
| 9 | |
| 10 | import ( |
| 11 | "encoding/json" |
| 12 | "fmt" |
| 13 | "os" |
| 14 | "path/filepath" |
| 15 | "strconv" |
| 16 | "strings" |
| 17 | "time" |
| 18 | ) |
| 19 | |
| 20 | type task struct { |
| 21 | Text string `json:"text"` |
| 22 | Done bool `json:"done"` |
| 23 | Created time.Time `json:"created"` |
| 24 | } |
| 25 | |
| 26 | func file() string { |
| 27 | home, err := os.UserHomeDir() |
| 28 | if err != nil { |
| 29 | home = "." |
| 30 | } |
| 31 | return filepath.Join(home, ".tasks.json") |
| 32 | } |
| 33 | |
| 34 | func load() []task { |
| 35 | var ts []task |
| 36 | if b, err := os.ReadFile(file()); err == nil { |
| 37 | json.Unmarshal(b, &ts) |
| 38 | } |
| 39 | return ts |
| 40 | } |
| 41 | |
| 42 | func save(ts []task) { |
| 43 | b, _ := json.MarshalIndent(ts, "", " ") |
| 44 | if err := os.WriteFile(file(), b, 0o644); err != nil { |
| 45 | fmt.Fprintln(os.Stderr, "couldn't save tasks:", err) |
| 46 | os.Exit(1) |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | func list(ts []task, all bool) { |
| 51 | shown := 0 |
| 52 | for i, t := range ts { |
| 53 | if t.Done && !all { |
| 54 | continue |
| 55 | } |
| 56 | box := "[ ]" |
| 57 | if t.Done { |
| 58 | box = "[x]" |
| 59 | } |
| 60 | fmt.Printf("%3d. %s %s\n", i+1, box, t.Text) |
| 61 | shown++ |
| 62 | } |
| 63 | if shown == 0 { |
| 64 | fmt.Println("Nothing to do. Add a task with: tasks add <what to do>") |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | func main() { |
| 69 | ts := load() |
| 70 | args := os.Args[1:] |
| 71 | if len(args) == 0 { |
| 72 | list(ts, false) |
| 73 | return |
| 74 | } |
| 75 | switch args[0] { |
| 76 | case "add": |
| 77 | text := strings.TrimSpace(strings.Join(args[1:], " ")) |
| 78 | if text == "" { |
| 79 | fmt.Println("What should the task say? Example: tasks add Call mom") |
| 80 | os.Exit(1) |
| 81 | } |
| 82 | ts = append(ts, task{Text: text, Created: time.Now()}) |
| 83 | save(ts) |
| 84 | fmt.Printf("Added task %d: %s\n", len(ts), text) |
| 85 | case "done": |
| 86 | if len(args) < 2 { |
| 87 | fmt.Println("Which task? Example: tasks done 2") |
| 88 | os.Exit(1) |
| 89 | } |
| 90 | n, err := strconv.Atoi(args[1]) |
| 91 | if err != nil || n < 1 || n > len(ts) { |
| 92 | fmt.Println("There's no task with that number.") |
| 93 | os.Exit(1) |
| 94 | } |
| 95 | ts[n-1].Done = true |
| 96 | save(ts) |
| 97 | fmt.Printf("Nice! Finished: %s\n", ts[n-1].Text) |
| 98 | case "all": |
| 99 | list(ts, true) |
| 100 | case "clear": |
| 101 | var open []task |
| 102 | for _, t := range ts { |
| 103 | if !t.Done { |
| 104 | open = append(open, t) |
| 105 | } |
| 106 | } |
| 107 | save(open) |
| 108 | fmt.Printf("Removed %d finished task(s).\n", len(ts)-len(open)) |
| 109 | case "help", "-h", "--help": |
| 110 | fmt.Println("Usage: tasks [add <text> | done <number> | all | clear]") |
| 111 | default: |
| 112 | fmt.Println("Unknown command. Try: tasks help") |
| 113 | os.Exit(1) |
| 114 | } |
| 115 | } |