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|
use sqlite::{Connection, State};
use crate::BString;
use crate::date::DateTime;
use std::env::current_dir;
use std::i64;
use std::path::PathBuf;
fn db_file() -> PathBuf {
crate::basedir::data_dir().join("history.db")
}
#[derive(Clone)]
pub struct HistoryEntry {
/// time of execution
pub time: DateTime,
/// absolute path where the command was executed
pub loc: BString,
/// the command
pub cmd: BString,
}
pub fn canonical_path(mut path: BString) -> BString {
while let Some(b'/') = path.last() {
path.pop();
}
if path.is_empty() {
path.push(b'/');
}
path
}
impl HistoryEntry {
pub fn new(cmd: BString) -> Self {
Self {
time: DateTime::now(),
loc: canonical_path(
current_dir()
.unwrap()
.as_os_str()
.as_encoded_bytes()
.to_vec(),
),
cmd,
}
}
}
fn try_db() -> sqlite::Result<Connection> {
sqlite::open(db_file())
}
fn db() -> Connection {
try_db().unwrap()
}
pub fn setup() {
let db = db();
db.execute(
"
CREATE TABLE IF NOT EXISTS history (
id INTEGER PRIMARY KEY AUTOINCREMENT,
ts INTEGER NOT NULL,
loc BLOB NOT NULL,
cmd BLOB NOT NULL
)
",
)
.unwrap();
db.execute("CREATE INDEX IF NOT EXISTS idx_history_ts ON history(ts)")
.unwrap();
}
fn try_persist(entry: &HistoryEntry) -> sqlite::Result<()> {
let db = try_db()?;
let mut s = db.prepare("INSERT INTO history (ts, loc, cmd) VALUES (?, ?, ?)")?;
s.bind((1, entry.time.unix() as i64))?;
s.bind((2, entry.loc.as_slice()))?;
s.bind((3, entry.cmd.as_slice()))?;
s.next()?;
Ok(())
}
pub fn persist(entry: &HistoryEntry) {
// keep quiet in case db fails
// TODO maybe better behavior?
let _ = try_persist(entry);
}
pub struct HistoryQueryer {
db: Connection,
}
impl HistoryQueryer {
pub fn new() -> sqlite::Result<Self> {
Ok(Self { db: try_db()? })
}
pub fn query(
&self,
min_time: Option<DateTime>,
max_time: Option<DateTime>,
path_prefix: Option<&[u8]>,
path_strict: bool,
) -> sqlite::Result<impl Iterator<Item = HistoryEntry>> {
let mut query = String::from("SELECT id, ts, loc, cmd FROM history\n");
let mut has_cond = false;
let mut cond = |c| {
if has_cond {
query += "AND ";
} else {
query += "WHERE ";
}
query += c;
query += "\n";
has_cond = true;
};
let path_prefix = path_prefix.map(|p| canonical_path(p.to_vec()));
let mut upper = Vec::new();
if let Some(path_prefix) = &path_prefix {
if path_strict {
cond("loc = ?");
} else {
upper = path_prefix.to_vec();
if let Some(last) = upper.last_mut() {
*last = last.saturating_add(1);
} else {
upper.push(0xFF);
}
cond("loc >= ? AND loc < ?");
}
}
if min_time.is_some() {
cond("ts >= ?");
}
if max_time.is_some() {
cond("ts <= ?");
}
query += "ORDER BY id asc";
let mut stmt = self.db.prepare(&query)?;
let mut i = 1;
if let Some(path_prefix) = &path_prefix {
stmt.bind((i, path_prefix.as_slice()))?;
i += 1;
if !path_strict {
stmt.bind((i, upper.as_slice()))?;
i += 1;
}
}
if let Some(t) = min_time {
stmt.bind((i, t.unix() as i64))?;
i += 1;
}
if let Some(t) = max_time {
stmt.bind((i, t.unix() as i64))?;
i += 1;
}
let _ = i;
Ok(std::iter::from_fn(move || match stmt.next() {
Ok(State::Row) => {
let ts: i64 = stmt.read::<i64, _>(1).ok()?;
let loc: Vec<u8> = stmt.read::<Vec<u8>, _>(2).ok()?;
let cmd: Vec<u8> = stmt.read::<Vec<u8>, _>(3).ok()?;
let time = DateTime::from_unix(ts as u64);
Some(HistoryEntry { time, loc, cmd })
}
_ => None,
}))
}
}
pub fn local_history_filter(
hist: Vec<HistoryEntry>,
min_time: Option<DateTime>,
max_time: Option<DateTime>,
path_prefix: Option<&[u8]>,
path_strict: bool,
) -> impl Iterator<Item = HistoryEntry> {
let path_prefix = path_prefix.map(|p| canonical_path(p.to_vec()));
hist.into_iter().filter(move |entry| {
if let Some(t) = &min_time
&& t.unix() > entry.time.unix()
{
return false;
}
if let Some(t) = &max_time
&& t.unix() < entry.time.unix()
{
return false;
}
if let Some(path_prefix) = &path_prefix {
if path_strict {
let canon_path = canonical_path(entry.loc.clone());
return &canon_path == path_prefix;
} else {
if !entry.loc.starts_with(&path_prefix) {
return false;
}
}
}
true
})
}
|
