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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
use std::io::Read;
use std::path::Path;
//XXX: use protobuf::Message;
use protobuf::parse_from_bytes;
use errors::*;
use sleep_register::*;
use metadata_msgs::{Stat, Node};
/// "Sort of" follows rust std::fs API for file system access.
pub struct DatDrive {
metadata: SleepDirRegister,
content: SleepDirRegister,
}
impl DatDrive {
/// Instantiates a drive in the given directory. Path should be the complete path (eg, ending
/// in '/.dat/'), not an enclosing directory containing files.
pub fn create<P: AsRef<Path>>(path: P) -> Result<DatDrive> {
// Calculate content discovery key and write as Index entry in metadata register
unimplemented!()
}
/// Path should be the complete path (eg, ending in '/.dat/'), not an enclosing directory
/// containing files.
pub fn open<P: AsRef<Path>>(path: P, writable: bool) -> Result<DatDrive> {
let mdrive = SleepDirRegister::open(path.as_ref(), "metadata", writable)?;
if mdrive.len()? == 0 {
bail!("Expected at least one entry (Index) in metadata register");
}
let cdrive = SleepDirRegister::open(path.as_ref(), "content", writable)?;
Ok(DatDrive {
metadata: mdrive,
content: cdrive,
})
}
}
impl<'a> DatDrive {
fn find_path(path: &Path) -> Result<u64> {
unimplemented!()
}
pub fn history<'b>(&'b mut self, start: u64) -> DriveHistory<'b> {
// Start must be at least 1; index 0 is the Index item
let start = if start == 0 { 1 } else { start };
DriveHistory {
drive: self,
current: start,
}
}
pub fn read_dir_recursive<P: AsRef<Path>>(&mut self, path: P) -> ReadDriveDir<'a> {
unimplemented!()
}
pub fn read_dir<P: AsRef<Path>>(&mut self, path: P) -> ReadDriveDir<'a> {
unimplemented!()
}
pub fn file_metadata<P: AsRef<Path>>(&mut self, path: P) -> Result<Stat> {
unimplemented!()
}
pub fn create_file_bytes<P: AsRef<Path>>(&mut self, path: P, stat: &Stat, data: &[u8]) -> Result<()> {
unimplemented!()
}
pub fn create_file<P: AsRef<Path>, R: Read>(&mut self, path: P, stat: &Stat, source: R) -> Result<()> {
unimplemented!()
}
/// Copies Stat metadata and all content from a file in the "real" filesystem into the
/// DatDrive.
pub fn import_file<P: AsRef<Path>, Q: AsRef<Path>>(&mut self, source: P, dest: Q) -> Result<()> {
unimplemented!()
}
/// Copies a file from the drive to the "real" filesystem, preserving Stat metadata.
pub fn export_file<P: AsRef<Path>, Q: AsRef<Path>>(&mut self, source: P, dest: Q) -> Result<()> {
unimplemented!()
}
/* Possible future helper functions to be even more like std::fs
pub fn rename<P: AsRef<Path>, Q: AsRef<Path>>(&mut self, from: P, to: Q) -> Result<()>
pub fn copy<P: AsRef<Path>, Q: AsRef<Path>>(&mut self, from: P, to: Q) -> Result<()>
pub fn remove_file<P: AsRef<Path>>(&mut self, path: P) -> Result<()>
pub fn remove_dir_all<P: AsRef<Path>>(&mut self, path: P) -> Result<()>
*/
}
#[test]
fn test_dd_open() {
let mut dd =
DatDrive::open(Path::new("test-data/dat/simple/.dat/"), false).unwrap();
// verified from dat log
assert_eq!(dd.history(1).count(), 2);
assert_eq!(dd.read_dir("/").count(), 1);
assert_eq!(dd.read_dir_recursive("/").count(), 1);
}
#[test]
fn test_dd_create() {
use tempdir::TempDir;
let tmp_dir = TempDir::new("geniza-test").unwrap();
let mut dd = DatDrive::create(tmp_dir.path()).unwrap();
assert_eq!(dd.history(1).count(), 0);
assert_eq!(dd.read_dir("/").count(), 0);
assert_eq!(dd.read_dir_recursive("/").count(), 0);
}
// TODO: unpack Node into a pub struct
#[derive(Debug)]
pub struct DriveEntry {
node: Node,
index: u64,
}
/// Iterator over full drive history (file additions/deletions).
pub struct DriveHistory<'a> {
drive: &'a mut DatDrive,
current: u64,
}
impl<'a> Iterator for DriveHistory<'a> {
type Item = Result<DriveEntry>;
fn next(&mut self) -> Option<Result<DriveEntry>> {
if self.current >= self.drive.metadata.len().unwrap() {
return None;
}
// TODO: handle Err, not unwrap
let data = match self.drive.metadata.get_data_entry(self.current) {
Err(e) => { return Some(Err(e)) },
Ok(v) => v,
};
let node = match parse_from_bytes::<Node>(&data) {
Err(e) => { return Some(Err(e.into())) },
Ok(v) => v,
};
let de = Ok(DriveEntry {
node,
index: self.current,
});
self.current += 1;
return Some(de);
}
}
/// Iterator over drive file entries.
pub struct ReadDriveDir<'a> {
drive: &'a mut DatDrive,
recursive: bool,
// Entries to recurse over
entries: Vec<u64>,
}
impl<'a> ReadDriveDir<'a> {
fn init<P: AsRef<Path>>(drive: &mut DatDrive, path: P, recursive: bool) {
unimplemented!();
// TODO: starting from the last data entry, recurse up to nearest directory, then recurse
// down to base path
//ReadDriveDir {
// drive,
// recursive,
// entries: vec![],
//}
}
}
impl<'a> Iterator for ReadDriveDir<'a> {
type Item = DriveEntry;
fn next(&mut self) -> Option<DriveEntry> {
unimplemented!();
}
}
|
