imag/libimagdiary/src/diary.rs

109 lines
3.2 KiB
Rust

use std::cmp::Ordering;
use libimagstore::store::Store;
use libimagstore::storeid::IntoStoreId;
use libimagerror::trace::trace_error;
use chrono::offset::local::Local;
use chrono::Datelike;
use itertools::Itertools;
use chrono::naive::datetime::NaiveDateTime;
use entry::Entry;
use diaryid::DiaryId;
use error::DiaryError as DE;
use error::DiaryErrorKind as DEK;
use result::Result;
use iter::DiaryEntryIterator;
use is_in_diary::IsInDiary;
#[derive(Debug)]
pub struct Diary<'a> {
store: &'a Store,
name: &'a str,
}
impl<'a> Diary<'a> {
pub fn open(store: &'a Store, name: &'a str) -> Diary<'a> {
Diary {
store: store,
name: name,
}
}
// create or get a new entry for today
pub fn new_entry_today(&self) -> Result<Entry> {
let dt = Local::now();
let ndt = dt.naive_local();
let id = DiaryId::new(String::from(self.name), ndt.year(), ndt.month(), ndt.day(), 0, 0);
self.new_entry_by_id(id)
}
pub fn new_entry_by_id(&self, id: DiaryId) -> Result<Entry> {
self.retrieve(id.with_diary_name(String::from(self.name)))
}
pub fn retrieve(&self, id: DiaryId) -> Result<Entry> {
id.into_storeid()
.and_then(|id| self.store.retrieve(id))
.map(|fle| Entry::new(fle))
.map_err(|e| DE::new(DEK::StoreWriteError, Some(Box::new(e))))
}
// Get an iterator for iterating over all entries
pub fn entries(&self) -> Result<DiaryEntryIterator<'a>> {
self.store
.retrieve_for_module("diary")
.map(|iter| DiaryEntryIterator::new(self.name, self.store, iter))
.map_err(|e| DE::new(DEK::StoreReadError, Some(Box::new(e))))
}
pub fn delete_entry(&self, entry: Entry) -> Result<()> {
if !entry.is_in_diary(self.name) {
return Err(DE::new(DEK::EntryNotInDiary, None));
}
let id = entry.get_location().clone();
drop(entry);
self.store.delete(id)
.map_err(|e| DE::new(DEK::StoreWriteError, Some(Box::new(e))))
}
pub fn get_youngest_entry(&self) -> Option<Result<Entry>> {
match self.entries() {
Err(e) => Some(Err(e)),
Ok(entries) => {
entries.sorted_by(|a, b| {
match (a, b) {
(&Ok(ref a), &Ok(ref b)) => {
let a : NaiveDateTime = a.diary_id().into();
let b : NaiveDateTime = b.diary_id().into();
a.cmp(&b)
},
(&Ok(_), &Err(ref e)) => {
trace_error(e);
Ordering::Less
},
(&Err(ref e), &Ok(_)) => {
trace_error(e);
Ordering::Greater
},
(&Err(ref e1), &Err(ref e2)) => {
trace_error(e1);
trace_error(e2);
Ordering::Equal
},
}
}).into_iter().next()
}
}
}
pub fn name(&self) -> &'a str {
&self.name
}
}