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
|
use std::{
fs::{create_dir_all, File},
io::{Read, Write},
path::PathBuf,
time::{SystemTime, UNIX_EPOCH},
};
use gethostname::gethostname;
use serde::{Deserialize, Serialize};
use uuid::Uuid;
use crate::{
config::Config,
error::{Error, Result},
packages::Package,
pathinfo::PathInfo,
};
pub type BackupId = String;
#[derive(Debug, Serialize, Deserialize)]
pub struct Backup {
id: String,
timestamp: u64,
packages: Vec<Package>,
files: Vec<PathInfo>,
}
impl Backup {
pub fn create(config: &Config, packages: Vec<Package>) -> Result<Self> {
let mut files: Vec<PathInfo> = Vec::new();
for dir in &config.directories {
files.push(PathInfo::from_path(config, dir)?);
}
Ok(Self {
// UUID not really needed, maybe a shorter hash
id: Uuid::new_v4().to_string(),
timestamp: Self::get_timestamp(),
packages,
files,
})
}
pub fn save(&self, config: &Config) -> Result<()> {
let rel_location = format!(
"{}_{}",
gethostname()
.into_string()
.map_err(|_| Error::InvalidOsString)?,
Self::get_timestamp()
);
let bl = BackupLocation {
id: self.id.to_string(),
rel_location,
};
Self::append_to_root_index(config, bl.clone())?;
let backup_root = format!("{}/{}", config.root, bl.rel_location);
create_dir_all(&backup_root).unwrap();
let path = format!("{}/index.json", backup_root);
let mut f = File::create(path).unwrap();
f.write_all(&serde_json::to_vec(self).unwrap()).unwrap();
Ok(())
}
pub fn get_index(config: &Config, id: Option<BackupId>) -> Result<Self> {
let backup_index_root = format!("{}/index.json", config.root);
let list: Vec<BackupLocation> = Self::get_json_content(&backup_index_root)?;
println!("{list:#?}");
let index_loc = if let Some(id) = id {
list.iter()
.find(|bl| bl.id == id)
.ok_or(Error::BackupNotFound)?
.rel_location
.clone()
} else {
list.last()
.ok_or(Error::BackupNotFound)?
.rel_location
.clone()
};
let path = format!("{}/{index_loc}/index.json", config.root);
let index_file: Self = Self::get_json_content(&path)?;
Ok(index_file)
}
fn get_json_content<T: for<'a> Deserialize<'a>>(path: &str) -> Result<T> {
let mut file = File::open(path)?;
let mut content = String::new();
file.read_to_string(&mut content)?;
Ok(serde_json::from_str(&content)?)
}
fn append_to_root_index(config: &Config, new_backup: BackupLocation) -> Result<()> {
let backup_index_root = format!("{}/index.json", config.root);
let path = PathBuf::from(&backup_index_root);
if path.exists() {
let mut f = File::open(&path)?;
let mut content = String::new();
f.read_to_string(&mut content)?;
let mut loc: Vec<BackupLocation> = serde_json::from_str(&content)?;
let mut f = File::create(path)?;
loc.push(new_backup);
f.write_all(&serde_json::to_vec(&loc)?)?;
} else {
let mut f = File::create(backup_index_root)?;
f.write_all(&serde_json::to_vec(&vec![new_backup])?)?;
};
Ok(())
}
fn get_timestamp() -> u64 {
SystemTime::now()
.duration_since(UNIX_EPOCH)
.unwrap()
.as_secs()
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
struct BackupLocation {
id: BackupId,
rel_location: String,
}
|
