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|
pub struct SessionList {
sessions: Vec<crate::protocol::Session>,
offset: usize,
size: crate::term::Size,
}
impl SessionList {
pub fn new(
sessions: Vec<crate::protocol::Session>,
size: crate::term::Size,
) -> Self {
let mut by_name = std::collections::HashMap::new();
for session in sessions {
if !by_name.contains_key(&session.username) {
by_name.insert(session.username.clone(), vec![]);
}
by_name.get_mut(&session.username).unwrap().push(session);
}
let mut names: Vec<_> = by_name.keys().cloned().collect();
names.sort_by(|a: &String, b: &String| {
let a_idle =
by_name[a].iter().min_by_key(|session| session.idle_time);
let b_idle =
by_name[b].iter().min_by_key(|session| session.idle_time);
// these unwraps are safe because we know that none of the vecs in
// the map can be empty
a_idle.unwrap().idle_time.cmp(&b_idle.unwrap().idle_time)
});
for name in &names {
if let Some(sessions) = by_name.get_mut(name) {
sessions.sort_by_key(|s| s.idle_time);
}
}
let mut sorted = vec![];
for name in names {
let sessions = by_name.remove(&name).unwrap();
for session in sessions {
sorted.push(session);
}
}
Self {
sessions: sorted,
offset: 0,
size,
}
}
pub fn visible_sessions(&self) -> &[crate::protocol::Session] {
let start = self.offset;
let end = self.offset + self.limit();
let end = end.min(self.sessions.len());
&self.sessions[start..end]
}
pub fn visible_sessions_with_chars(
&self,
) -> impl Iterator<Item = (char, &crate::protocol::Session)> {
self.visible_sessions()
.iter()
.enumerate()
.map(move |(i, s)| (self.idx_to_char(i).unwrap(), s))
}
pub fn size(&self) -> crate::term::Size {
self.size
}
pub fn resize(&mut self, size: crate::term::Size) {
self.size = size;
}
pub fn id_for(&self, c: char) -> Option<&str> {
self.char_to_idx(c).and_then(|i| {
self.sessions.get(i + self.offset).map(|s| s.id.as_ref())
})
}
pub fn next_page(&mut self) {
let inc = self.limit();
if self.offset + inc < self.sessions.len() {
self.offset += inc;
}
}
pub fn prev_page(&mut self) {
let dec = self.limit();
if self.offset >= dec {
self.offset -= dec;
}
}
pub fn current_page(&self) -> usize {
self.offset / self.limit() + 1
}
pub fn total_pages(&self) -> usize {
if self.sessions.is_empty() {
1
} else {
(self.sessions.len() - 1) / self.limit() + 1
}
}
fn idx_to_char(&self, mut i: usize) -> Option<char> {
if i >= self.limit() {
return None;
}
// 'q' shouldn't be a list option, since it is bound to quit
if i >= 16 {
i += 1;
}
#[allow(clippy::cast_possible_truncation)]
Some(std::char::from_u32(('a' as u32) + (i as u32)).unwrap())
}
fn char_to_idx(&self, c: char) -> Option<usize> {
if c == 'q' {
return None;
}
let i = ((c as i32) - ('a' as i32)) as isize;
if i < 0 {
return None;
}
#[allow(clippy::cast_sign_loss)]
let mut i = i as usize;
// 'q' shouldn't be a list option, since it is bound to quit
if i > 16 {
i -= 1;
}
if i >= self.limit() {
return None;
}
Some(i)
}
fn limit(&self) -> usize {
let limit = self.size.rows as usize - 6;
// enough for a-z except q - if we want to allow more than this, we'll
// need to come up with a better way of choosing streams
if limit > 25 {
25
} else {
limit
}
}
}
#[cfg(test)]
#[allow(clippy::cognitive_complexity)]
#[allow(clippy::redundant_clone)]
#[allow(clippy::shadow_unrelated)]
mod test {
use super::*;
fn session(username: &str, idle: u32) -> crate::protocol::Session {
crate::protocol::Session {
id: format!("{}", uuid::Uuid::new_v4()),
username: username.to_string(),
term_type: "screen".to_string(),
size: crate::term::Size { rows: 24, cols: 80 },
idle_time: idle,
title: "title".to_string(),
watchers: 0,
}
}
#[test]
fn test_session_list_sorting() {
let size = crate::term::Size { rows: 24, cols: 80 };
let session1 = session("doy", 35);
let session2 = session("doy", 3);
let mut session3 = session("sartak", 12);
let session4 = session("sartak", 100);
let mut session5 = session("toft", 5);
let mut sessions = vec![
session1.clone(),
session2.clone(),
session3.clone(),
session4.clone(),
session5.clone(),
];
assert_eq!(
SessionList::new(sessions.clone(), size.clone()).sessions,
vec![
session2.clone(),
session1.clone(),
session5.clone(),
session3.clone(),
session4.clone(),
]
);
session3.idle_time = 2;
sessions[2].idle_time = 2;
assert_eq!(
SessionList::new(sessions.clone(), size.clone()).sessions,
vec![
session3.clone(),
session4.clone(),
session2.clone(),
session1.clone(),
session5.clone(),
]
);
session5.idle_time = 1;
sessions[4].idle_time = 1;
assert_eq!(
SessionList::new(sessions.clone(), size.clone()).sessions,
vec![
session5.clone(),
session3.clone(),
session4.clone(),
session2.clone(),
session1.clone(),
]
);
}
#[test]
fn test_session_list_pagination() {
let size = crate::term::Size { rows: 11, cols: 80 };
let sessions = vec![
session("doy", 0),
session("doy", 1),
session("doy", 2),
session("doy", 3),
session("doy", 4),
session("doy", 5),
session("doy", 6),
session("doy", 7),
session("doy", 8),
session("doy", 9),
session("doy", 10),
];
let mut list = SessionList::new(sessions.clone(), size);
assert_eq!(list.limit(), 5);
assert_eq!(list.total_pages(), 3);
assert_eq!(list.current_page(), 1);
list.next_page();
assert_eq!(list.limit(), 5);
assert_eq!(list.total_pages(), 3);
assert_eq!(list.current_page(), 2);
list.next_page();
assert_eq!(list.limit(), 5);
assert_eq!(list.total_pages(), 3);
assert_eq!(list.current_page(), 3);
list.next_page();
assert_eq!(list.limit(), 5);
assert_eq!(list.total_pages(), 3);
assert_eq!(list.current_page(), 3);
list.prev_page();
assert_eq!(list.limit(), 5);
assert_eq!(list.total_pages(), 3);
assert_eq!(list.current_page(), 2);
list.prev_page();
assert_eq!(list.limit(), 5);
assert_eq!(list.total_pages(), 3);
assert_eq!(list.current_page(), 1);
list.prev_page();
assert_eq!(list.limit(), 5);
assert_eq!(list.total_pages(), 3);
assert_eq!(list.current_page(), 1);
let id = list.id_for('a').unwrap();
assert_eq!(id, sessions[0].id);
let id = list.id_for('e').unwrap();
assert_eq!(id, sessions[4].id);
let id = list.id_for('f');
assert!(id.is_none());
list.next_page();
let id = list.id_for('a').unwrap();
assert_eq!(id, sessions[5].id);
list.next_page();
let id = list.id_for('a').unwrap();
assert_eq!(id, sessions[10].id);
let id = list.id_for('b');
assert!(id.is_none());
let size = crate::term::Size { rows: 24, cols: 80 };
let sessions = vec![
session("doy", 0),
session("doy", 1),
session("doy", 2),
session("doy", 3),
session("doy", 4),
session("doy", 5),
session("doy", 6),
session("doy", 7),
session("doy", 8),
session("doy", 9),
session("doy", 10),
session("doy", 11),
session("doy", 12),
session("doy", 13),
session("doy", 14),
session("doy", 15),
session("doy", 16),
session("doy", 17),
session("doy", 18),
session("doy", 19),
session("doy", 20),
session("doy", 21),
];
let list = SessionList::new(sessions.clone(), size);
assert_eq!(list.limit(), 18);
assert_eq!(list.total_pages(), 2);
assert_eq!(list.current_page(), 1);
let id = list.id_for('a').unwrap();
assert_eq!(id, sessions[0].id);
let id = list.id_for('p').unwrap();
assert_eq!(id, sessions[15].id);
let id = list.id_for('q');
assert!(id.is_none());
let id = list.id_for('r').unwrap();
assert_eq!(id, sessions[16].id);
let id = list.id_for('s').unwrap();
assert_eq!(id, sessions[17].id);
let id = list.id_for('t');
assert!(id.is_none());
}
}
|
