70 lines
2.4 KiB
Rust
70 lines
2.4 KiB
Rust
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//
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// imag - the personal information management suite for the commandline
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// Copyright (C) 2015, 2016 Matthias Beyer <mail@beyermatthias.de> and contributors
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; version
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// 2.1 of the License.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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use libimagstore::storeid::StoreIdIterator;
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use libimagstore::store::Store;
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use libimagstore::store::FileLockEntry;
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use contact::Contact;
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use error::ContactError as CE;
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use error::ContactErrorKind as CEK;
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use error::Result;
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pub struct ContactIter<'a>(StoreIdIterator, &'a Store);
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/// Iterator over contacts
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///
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/// As the libimagcontact works with libimagentryref in the backend, we must hold a reference to the
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/// Store here as well, so we can check whether a fetched StoreId actually points to a contact
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/// reference or not.
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///
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/// So, the Iterator `Store::get()`s the object pointed to by the StoreId and returns it if
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/// everything worked.
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impl<'a> ContactIter<'a> {
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pub fn new(sii: StoreIdIterator, store: &'a Store) -> ContactIter<'a> {
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ContactIter(sii, store)
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}
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}
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impl<'a> Iterator for ContactIter<'a> {
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type Item = Result<FileLockEntry<'a>>;
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fn next(&mut self) -> Option<Self::Item> {
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loop {
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match self.0.next() {
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None => return None,
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Some(sid) => match self.1.get(sid.clone()).map_err(From::from) {
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Err(e) => return Some(Err(e)),
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Ok(None) => return Some(Err(CE::from_kind(CEK::EntryNotFound(sid)))),
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Ok(Some(entry)) => match entry.is_contact().map_err(From::from) {
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Ok(true) => return Some(Ok(entry)),
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Ok(false) => continue,
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Err(e) => return Some(Err(e)),
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},
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},
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}
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}
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}
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}
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