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use std::ops::Drop;
use std::ffi::{CStr, CString};
use supercow::Supercow;
use ffi;
use Message;
use MessageOwner;
use utils::{ScopedSupercow, ScopedPhantomcow};
#[derive(Debug)]
pub struct MessageProperties<'m, 'o, O>
where
O: MessageOwner + 'o
{
ptr: *mut ffi::notmuch_message_properties_t,
marker: ScopedPhantomcow<'m, Message<'o, O>>,
}
impl<'m, 'o, O> Drop for MessageProperties<'m, 'o, O>
where
O: MessageOwner + 'o
{
fn drop(&mut self) {
unsafe { ffi::notmuch_message_properties_destroy(self.ptr) };
}
}
impl<'m, 'o, O> MessageProperties<'m, 'o, O>
where
O: MessageOwner + 'o
{
pub(crate) fn from_ptr<S>(ptr: *mut ffi::notmuch_message_properties_t, owner: S) -> MessageProperties<'m, 'o, O>
where
S: Into<ScopedPhantomcow<'m, Message<'o, O>>>,
{
MessageProperties {
ptr,
marker: owner.into(),
}
}
}
impl<'m, 'o, O> Iterator for MessageProperties<'m, 'o, O>
where
O: MessageOwner + 'o
{
type Item = (String, String);
fn next(&mut self) -> Option<Self::Item> {
let valid = unsafe { ffi::notmuch_message_properties_valid(self.ptr) };
if valid == 0 {
return None;
}
let (k, v) = unsafe {
let key = CStr::from_ptr(ffi::notmuch_message_properties_key(self.ptr));
let value = CStr::from_ptr(ffi::notmuch_message_properties_value(self.ptr));
ffi::notmuch_message_properties_move_to_next(self.ptr);
(key, value)
};
Some((k.to_str().unwrap().to_string(), v.to_str().unwrap().to_string()))
}
}
unsafe impl<'m, 'o, O> Send for MessageProperties<'m, 'o, O> where
O: MessageOwner + 'o {}
unsafe impl<'m, 'o, O> Sync for MessageProperties<'m, 'o, O> where
O: MessageOwner + 'o {}
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