/
camera.go
54 lines (51 loc) · 1.2 KB
/
camera.go
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
package main
import (
"github.com/antonholmquist/jason"
"strings"
)
func findCamera(metadata []*jason.Object) (string, string) {
make := ""
model := ""
for i := 0; i < len(metadata); i++ {
name, err := metadata[i].GetString("name")
if err != nil {
panic(err)
}
if name == "Make" {
value, err := metadata[i].GetString("value")
if err == nil {
make = strings.Trim(value, " \n")
}
} else if name == "Model" {
value, err := metadata[i].GetString("value")
if err == nil {
model = strings.Trim(value, " \n")
}
} else if name == "metadata" {
// MediaWiki can return strange embedded metadata
// arrays for PNG files.
obj, err := metadata[i].GetObjectArray("value")
// Ignore if not an object array.
if err == nil {
tmake, tmodel := findCamera(obj)
if tmake != "" {
make = tmake
}
if tmodel != "" {
model = tmodel
}
}
}
}
return make, model
}
// Return device make/model from json imageinfo object.
func extractCamera(imageinfo *jason.Object) (string, string) {
metadata, err := imageinfo.GetObjectArray("commonmetadata")
if err != nil {
// metadata is null in some cases
return "", ""
} else {
return findCamera(metadata)
}
}