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use std::{fmt, str::FromStr};
use camino::{Utf8Path, Utf8PathBuf};
use time::OffsetDateTime;
use tokio::sync::RwLock;
use crate::{WikError, WikFile, WikPath, fs::Open, git::GitContext, quotes_decode, quotes_encode};
#[derive(Copy, Clone, Debug, PartialEq, Hash)]
pub enum JournalName {
Created,
Modified,
}
impl JournalName {
pub fn filename(&self) -> &'static str {
match self {
Self::Created => "created",
Self::Modified => "modified",
}
}
}
pub struct Journal {
files: Vec<JournalFile>,
}
impl Journal {
const PATH_JOURNAL: &'static str = ".wikarden/journal";
pub async fn init(root: &Utf8Path) -> Result<Self, WikError> {
let journal_root = root.join(Self::PATH_JOURNAL);
std::fs::create_dir_all(&journal_root).unwrap();
Ok(Self {
files: vec![
JournalFile::init(JournalName::Created, &journal_root).await?,
JournalFile::init(JournalName::Modified, &journal_root).await?,
],
})
}
pub fn journal(&self, name: JournalName) -> &JournalFile {
self.files.iter().find(|jf| jf.name == name).unwrap()
}
pub async fn journal_tail(&self, name: JournalName, count: usize) -> Vec<JournalLine> {
let lock = self.journal(name).entries.read().await;
let len = lock.len();
let start = len.saturating_sub(count);
lock[start..len].to_vec()
}
pub async fn push(&self, name: JournalName, path: WikPath) -> Result<(), WikError> {
let journal = self.journal(name);
journal.push(path).await;
journal.save().await
}
pub async fn del(&self, name: JournalName, path: WikPath) -> Result<(), WikError> {
let journal = self.journal(name);
match journal.del(path).await {
None => return Ok(()),
Some(_) => {
journal.save().await?;
Ok(())
}
}
}
pub async fn rename(
&self,
name: JournalName,
from: WikPath,
to: WikPath,
) -> Result<bool, WikError> {
let journal = self.journal(name);
journal.rename(from, to).await
}
pub fn git_add(&self, gtx: &mut GitContext) {
for jrnl in &self.files {
jrnl.git_add(gtx);
}
}
}
pub struct JournalFile {
name: JournalName,
path: Utf8PathBuf,
entries: RwLock<Vec<JournalLine>>,
}
impl JournalFile {
pub async fn init(name: JournalName, root: &Utf8Path) -> Result<Self, WikError> {
let path = root.join(name.filename());
let file = WikFile::open(path.clone(), crate::Open::CreateAppend).await?;
let mut entries = vec![];
for line in file.read_to_string().await?.lines() {
entries.push(line.parse()?);
}
Self::sort(&mut entries);
Ok(Self {
name,
path,
entries: RwLock::new(entries),
})
}
pub async fn push(&self, path: WikPath) {
let line = JournalLine::now(path.as_ref());
let mut lock = self.entries.write().await;
if let Some(idx) = lock.iter().position(|jl| jl.path == path.as_ref()) {
lock[idx] = line;
} else {
lock.push(line);
}
//TODO: insert the line at the correct position to begin with
Self::sort(&mut lock);
}
pub async fn del(&self, path: WikPath) -> Option<JournalLine> {
let mut lock = self.entries.write().await;
match lock.iter().position(|jl| jl.path.eq(path.as_ref())) {
None => None,
Some(idx) => Some(lock.remove(idx)),
}
}
pub async fn rename(&self, from: WikPath, to: WikPath) -> Result<bool, WikError> {
let mut lock = self.entries.write().await;
match lock.iter_mut().find(|jl| jl.path.eq(from.as_ref())) {
None => Ok(false),
Some(item) => {
item.path = to.as_ref().into();
Self::sort(&mut lock);
drop(lock);
self.save().await?;
Ok(true)
}
}
}
pub async fn save(&self) -> Result<(), WikError> {
let lock = self.entries.read().await;
let mut file = WikFile::open(self.path.clone(), Open::Create).await?;
file.write_all_strs(lock.iter()).await
}
pub fn git_add(&self, gtx: &mut GitContext) {
gtx.add_rel(&self.path).unwrap();
}
fn sort(slice: &mut [JournalLine]) {
slice.sort_by(|a, b| a.time.cmp(&b.time));
}
}
#[derive(Clone, Debug)]
pub struct JournalLine {
path: Utf8PathBuf,
time: OffsetDateTime,
}
impl JournalLine {
pub fn now<P: Into<Utf8PathBuf>>(path: P) -> Self {
Self {
path: path.into(),
time: OffsetDateTime::now_utc(),
}
}
pub fn path(&self) -> String {
self.path.to_string()
}
pub fn epoch(&self) -> i64 {
(self.time - OffsetDateTime::UNIX_EPOCH).whole_seconds()
}
}
impl fmt::Display for JournalLine {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
writeln!(f, "{} {}", quotes_encode(self.path.as_str()), self.epoch())
}
}
impl FromStr for JournalLine {
type Err = WikError;
fn from_str(raw: &str) -> Result<Self, Self::Err> {
let decode = quotes_decode(raw);
match decode {
None => Err(WikError::journal("string does not start with quote")),
Some((path, rest)) => {
let time_str = rest.trim_start();
let time: i64 = match time_str.parse() {
Err(_) => return Err(WikError::journal("time is not a number")),
Ok(stamp) => stamp,
};
match OffsetDateTime::from_unix_timestamp(time) {
Err(_) => Err(WikError::journal("timestamp is not valid")),
Ok(time) => Ok(Self {
path: path.into(),
time,
}),
}
}
}
}
}
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