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// // imag - the personal information management suite for the commandline // Copyright (C) 2015-2018 Matthias Beyer <mail@beyermatthias.de> and contributors // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Lesser General Public // License as published by the Free Software Foundation; version // 2.1 of the License. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA // use libimagstore::storeid::StoreIdIterator; use libimagstore::store::Store; use libimagstore::store::FileLockEntry; use contact::Contact; use error::ContactError as CE; use error::ContactErrorKind as CEK; use error::Result; pub struct ContactIter<'a>(StoreIdIterator, &'a Store); /// Iterator over contacts /// /// As the libimagcontact works with libimagentryref in the backend, we must hold a reference to the /// Store here as well, so we can check whether a fetched StoreId actually points to a contact /// reference or not. /// /// So, the Iterator `Store::get()`s the object pointed to by the StoreId and returns it if /// everything worked. impl<'a> ContactIter<'a> { pub fn new(sii: StoreIdIterator, store: &'a Store) -> ContactIter<'a> { ContactIter(sii, store) } } impl<'a> Iterator for ContactIter<'a> { type Item = Result<FileLockEntry<'a>>; fn next(&mut self) -> Option<Self::Item> { loop { match self.0.next() { None => return None, Some(sid) => match self.1.get(sid.clone()).map_err(From::from) { Err(e) => return Some(Err(e)), Ok(None) => return Some(Err(CE::from_kind(CEK::EntryNotFound(sid)))), Ok(Some(entry)) => match entry.is_contact().map_err(From::from) { Ok(true) => return Some(Ok(entry)), Ok(false) => continue, Err(e) => return Some(Err(e)), }, }, } } } }