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
|
use super::NewPhoto;
use super::NewPhotoSet;
use crate::error::DichroismError;
use crate::result::Result;
use base64::decode;
use image::imageops::FilterType;
use image::DynamicImage;
use image::GenericImageView;
use regex::Regex;
use std::path::PathBuf;
use uuid::Uuid;
use once_cell::sync::Lazy;
static DATA_URI_RE: Lazy<Regex> = Lazy::new(|| {
Regex::new("^data:image/(png|jpeg);base64,(?P<data>.+)")
.expect("Couldn't parse data URI Regex.")
});
pub struct NewPhotoSetData {
original: DynamicImage, // original, just for safe-keeping
fullsize: DynamicImage, // full-size, "zoomed" view
base: DynamicImage, // basic viewing
thumbnail: DynamicImage, // tiny, square thumbnail
}
impl NewPhotoSetData {
pub fn from_data_uri(uri: &str) -> Result<Self> {
let data = DATA_URI_RE
.captures(uri)
.ok_or(DichroismError::UriDataExtract)?
.name("data")
.ok_or(DichroismError::UriDataExtract)?
.as_str();
let original = image::load_from_memory(&decode(data)?)?;
let fullsize = original.resize(1000, 1000, FilterType::Lanczos3);
let base = original.resize(640, 640, FilterType::Lanczos3);
let (width, height) = original.dimensions();
let thumbnail = if width > height {
let offset = (width - height) / 2;
original.crop_imm(offset, 0, width - offset * 2, height)
} else {
let offset = (height - width) / 2;
original.crop_imm(0, offset, width, height - offset * 2)
}
.resize(300, 300, FilterType::Lanczos3);
Ok(NewPhotoSetData {
original,
fullsize,
base,
thumbnail,
})
}
pub fn commit(self, prefix: &str) -> Result<NewPhotoSet> {
Ok(NewPhotoSet {
original: self.commit_single(prefix, &self.original)?,
fullsize: self.commit_single(prefix, &self.fullsize)?,
base: self.commit_single(prefix, &self.base)?,
thumbnail: self.commit_single(prefix, &self.thumbnail)?,
})
}
fn commit_single(&self, prefix: &str, image: &DynamicImage) -> Result<NewPhoto> {
let base_name = Uuid::new_v3(&Uuid::NAMESPACE_OID, &image.to_bytes())
.to_hyphenated()
.to_string();
let mut path = PathBuf::new();
path.push(prefix);
path.push(base_name);
path.set_extension("jpg");
image.save(&path)?;
Ok(NewPhoto {
path: path.to_str().ok_or(DichroismError::ImageWrite)?.to_string(),
})
}
}
#[cfg(test)]
mod tests {
use super::*;
const TEST_DATA_URI: &str = include_str!("../unit_test_data/img_data_uri.txt");
const TEST_DATA_BASE64: &str = include_str!("../unit_test_data/test_data_base64.txt");
#[test]
fn test_gen_product_images() {
NewPhotoSetData::from_data_uri(TEST_DATA_URI.trim())
.unwrap()
.commit(".")
.unwrap();
}
}
|
