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use std::ops::Drop;
use std::iter::Iterator;
use std::marker::PhantomData;
use ffi;
use utils::{
FromPtr,
};
use Query;
use Message;
use Tags;
use message::MessageOwner;
use tags::TagsOwner;
pub trait MessagesOwner{
}
#[derive(Debug)]
pub(crate) struct MessagesPtr {
pub ptr: *mut ffi::notmuch_messages_t
}
impl Drop for MessagesPtr {
fn drop(self: &mut Self) {
let valid = unsafe {
ffi::notmuch_messages_valid(self.ptr)
};
if valid == 0{
return;
}
unsafe {
ffi::notmuch_messages_destroy(self.ptr)
};
}
}
#[derive(Debug)]
pub struct Messages<'o, Owner: MessagesOwner>{
pub(crate) handle: MessagesPtr,
phantom: PhantomData<&'o Owner>,
}
impl<'o, Owner: MessagesOwner> FromPtr<*mut ffi::notmuch_messages_t> for Messages<'o, Owner> {
fn from_ptr(ptr: *mut ffi::notmuch_messages_t) -> Messages<'o, Owner> {
Messages{
handle: MessagesPtr{ptr},
phantom: PhantomData
}
}
}
impl<'o, Owner: MessagesOwner> MessageOwner for Messages<'o, Owner>{}
impl<'o, Owner: MessagesOwner> TagsOwner for Messages<'o, Owner>{}
impl<'o, Owner: MessagesOwner> Messages<'o, Owner>{
/**
* Return a list of tags from all messages.
*
* The resulting list is guaranteed not to contain duplicated tags.
*
* WARNING: You can no longer iterate over messages after calling this
* function, because the iterator will point at the end of the list.
* We do not have a function to reset the iterator yet and the only
* way how you can iterate over the list again is to recreate the
* message list.
*
* The function returns NULL on error.
*/
pub fn collect_tags<'m>(self: &'o Self) -> Tags<'m, Self>{
Tags::from_ptr(unsafe {
ffi::notmuch_messages_collect_tags(self.handle.ptr)
})
}
}
impl<'o, Owner: MessagesOwner> Iterator for Messages<'o, Owner> {
type Item = Message<'o, Self>;
fn next(&mut self) -> Option<Self::Item> {
let valid = unsafe {
ffi::notmuch_messages_valid(self.handle.ptr)
};
if valid == 0{
return None
}
let cmsg = unsafe {
let msg = ffi::notmuch_messages_get(self.handle.ptr);
ffi::notmuch_messages_move_to_next(self.handle.ptr);
msg
};
Some(Self::Item::from_ptr(cmsg))
}
}
unsafe impl<'o, Owner: MessagesOwner> Send for Messages<'o, Owner>{}
unsafe impl<'o, Owner: MessagesOwner> Sync for Messages<'o, Owner>{}
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