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download on demand (#2631)

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* draft a download-api

* basic implementation

* allow partial downloads for protected chats

* use a separate column for download_state

* force a minimal timeout for delete_server_after in combination with partial messages

* add a warning if a possible download may expire by delete_server_after

* test load_imap_deletion_msgid()

* add a test for a partial download

* improve documentation and visibility

* let get_download_limit() return Result<Option>

* rusty getters

* apply MIN_DELETE_SERVER_AFTER to shown availability time

* move stub-creation to download.rs, use stock-strings, nicer logging

* make clippy happy (cargo clippy --tests)

* refine tests and comments

* fix typo

* remove superfluous closure in ffi

* respect partial_download for immediately scheduled DeleteMsgOnImap jobs
This commit is contained in:
bjoern
2021-09-13 21:12:00 +02:00
committed by GitHub
parent 46956caf75
commit 0f2095947c
16 changed files with 789 additions and 54 deletions
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22
deltachat-ffi/src/lib.rs
View File

@@ -1652,6 +1652,18 @@ pub unsafe extern "C" fn dc_get_msg(context: *mut dc_context_t, msg_id: u32) ->
})
}
#[no_mangle]
pub unsafe extern "C" fn dc_download_full_msg(context: *mut dc_context_t, msg_id: u32) {
if context.is_null() {
eprintln!("ignoring careless call to dc_download_full_msg()");
return;
}
let ctx = &*context;
block_on(MsgId::new(msg_id).download_full(ctx))
.log_err(ctx, "Failed to download message fully.")
.ok();
}
#[no_mangle]
pub unsafe extern "C" fn dc_may_be_valid_addr(addr: *const libc::c_char) -> libc::c_int {
if addr.is_null() {
@@ -2791,6 +2803,16 @@ pub unsafe extern "C" fn dc_msg_get_state(msg: *mut dc_msg_t) -> libc::c_int {
ffi_msg.message.get_state() as libc::c_int
}
#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_download_state(msg: *mut dc_msg_t) -> libc::c_int {
if msg.is_null() {
eprintln!("ignoring careless call to dc_msg_get_download_state()");
return 0;
}
let ffi_msg = &*msg;
ffi_msg.message.download_state() as libc::c_int
}
#[no_mangle]
pub unsafe extern "C" fn dc_msg_get_timestamp(msg: *mut dc_msg_t) -> i64 {
if msg.is_null() {