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add dc_chatlist_get_summary2() api

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needed for how node/js handles the chatlist currently
(it convertes the ffi-object to an js-object and throws ffi-object away directly,
this makes it hard to access dc_chatlist_get_summary() later.
This commit is contained in:
B. Petersen
2020-07-28 14:11:33 +02:00
parent 94ec142044
commit 2bf27dd5cd
3 changed files with 56 additions and 5 deletions
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22
deltachat-ffi/deltachat.h
View File

@@ -2470,6 +2470,28 @@ uint32_t dc_chatlist_get_msg_id (const dc_chatlist_t* chatlist, siz
dc_lot_t* dc_chatlist_get_summary (const dc_chatlist_t* chatlist, size_t index, dc_chat_t* chat);
/**
* Create a chatlist summary item when the chatlist object is already unref()'d.
*
* This function is similar to dc_chatlist_get_summary(), however,
* takes the chat-id and message-id as returned by dc_chatlist_get_chat_id() and dc_chatlist_get_msg_id()
* as arguments. The chatlist object itself is not needed directly.
*
* This maybe useful if you convert the complete object into a different represenation
* as done eg. in the node-bindings.
* If you have access to the chatlist object in some way, using this function is not recommended,
* use dc_chatlist_get_summary() in this case instead.
*
* @memberof dc_context_t
* @param context The context as created by dc_context_new()
* @param chat_id Chat to get a summary for.
* @param msg_id Messasge to get a summary for.
* @return The summary as an dc_lot_t object, see dc_chatlist_get_summary() for details.
* Must be freed using dc_lot_unref(). NULL is never returned.
*/
dc_lot_t* dc_chatlist_get_summary2 (dc_context_t* context, uint32_t chat_id, uint32_t msg_id);
/**
* Helper function to get the associated context object.
*

19
deltachat-ffi/src/lib.rs
View File

@@ -38,6 +38,7 @@ mod dc_array;
mod string;
use self::string::*;
use deltachat::chatlist::Chatlist;
// as C lacks a good and portable error handling,
// in general, the C Interface is forgiving wrt to bad parameters.
@@ -2227,6 +2228,24 @@ pub unsafe extern "C" fn dc_chatlist_get_summary(
})
}
#[no_mangle]
pub unsafe extern "C" fn dc_chatlist_get_summary2(
context: *mut dc_context_t,
chat_id: u32,
msg_id: u32,
) -> *mut dc_lot_t {
if context.is_null() {
eprintln!("ignoring careless call to dc_chatlist_get_summary2()");
return ptr::null_mut();
}
let ctx = &*context;
block_on(async move {
let lot =
Chatlist::get_summary2(&ctx, ChatId::new(chat_id), MsgId::new(msg_id), None).await;
Box::into_raw(Box::new(lot))
})
}
#[no_mangle]
pub unsafe extern "C" fn dc_chatlist_get_context(
chatlist: *mut dc_chatlist_t,