1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
package main
import (
"encoding/json"
"fmt"
"image"
_ "image/png"
_ "image/jpeg"
"io"
"log"
"math/rand"
"net/http"
"os"
"strconv"
"github.com/mattn/go-sixel"
"github.com/urfave/cli/v2"
)
const (
hostname = "https://xkcd.com"
target = "info.0.json"
)
var version string
type Comic struct {
Month string
Num int
Link string
Year string
News string
Safe_title string
Transcript string
Alt string
Img string
Title string
Day string
}
func main() {
app := &cli.App{
Name: "siXKCD",
Usage: "Sixel viewer/fetcher for XKCD Comics",
Version: version,
Authors: []*cli.Author{
{
Name: "Benjamin Chausse",
Email: "benjamin@chausse.xyz",
},
},
Flags: []cli.Flag{
&cli.StringFlag{
Name: "id",
Aliases: []string{"i"},
Usage: "Specify which comic `ID` to fetch.\nA value of 0 will fetch the latest comic (default: random)",
},
&cli.BoolFlag{
Name: "raw",
Aliases: []string{"r"},
Usage: "Output only the sixel image without the title or the alternate caption.",
},
},
Action: func(ctx *cli.Context) error {
comic := fetchComic("latest")
switch ctx.String("id") {
case "0":
// Latest is already fetched
break
case "":
// Random
rand := rand.Intn(comic.Num+1)
comic = fetchComic(strconv.Itoa(rand))
default:
comic = fetchComic(ctx.String("id"))
}
var img image.Image = fetchImg(comic.Img)
encoder := sixel.NewEncoder(os.Stdout)
switch ctx.Bool("raw") {
case true:
_ = encoder.Encode(img)
default:
fmt.Println("Title: ", comic.Title)
_ = encoder.Encode(img)
if comic.Alt != "" {
fmt.Println(comic.Alt)
}
}
return nil
},
}
if err := app.Run(os.Args); err != nil {
log.Fatal(err)
}
}
func fetchComic(id string) Comic {
var res *http.Response
var err error
if id == "latest" {
res, err = http.Get(hostname+"/"+target)
} else {
res, err = http.Get(hostname+"/"+id+"/"+target)
}
defer res.Body.Close()
if err != nil {
log.Fatal(err)
}
content, err := io.ReadAll(res.Body)
if err != nil {
log.Fatal(err)
}
comic := Comic{}
err = json.Unmarshal(content, &comic)
if err != nil {
log.Fatal(err)
}
return comic
}
func fetchImg(url string) image.Image {
res, err := http.Get(url)
if err != nil {
log.Fatal(err)
}
img, _, err := image.Decode(res.Body)
if err != nil {
log.Fatal(err)
}
res.Body.Close()
return img
}
|