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Use Auto-Submitted: auto-generated header to identify bots

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New `dc_msg_is_bot()` C API and corresponding `Message.is_bot()`
Python API can be used to check if incoming message is sent by a bot,
e.g. to avoid two echo bots replying indefinitely to each other.

"Bot" flag is not set for outgoing messages, but may be set for
BCC-self messages. For now documentation says that `dc_msg_is_bot()`
return value is unspecified for outgoing messages. It can be better
specified later if needed for specific applications, e.g. sharing an
account with a helper bot.
This commit is contained in:
link2xt
2021-06-19 01:11:48 +03:00
parent bf61c16dc1
commit f820671d53
8 changed files with 119 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
src/message.rs
View File

@@ -601,6 +601,11 @@ impl Message {
self.param.get_int(Param::GuaranteeE2ee).unwrap_or_default() != 0
}
/// Returns true if message is Auto-Submitted.
pub fn is_bot(&self) -> bool {
self.param.get_bool(Param::Bot).unwrap_or_default()
}
pub fn get_ephemeral_timer(&self) -> EphemeralTimer {
self.ephemeral_timer
}
@@ -2868,4 +2873,50 @@ mod tests {
Ok(())
}
#[async_std::test]
async fn test_is_bot() -> Result<()> {
let alice = TestContext::new_alice().await;
// Alice receives a message from Bob the bot.
dc_receive_imf(
&alice,
b"From: Bob <bob@example.com>\n\
To: alice@example.com\n\
Chat-Version: 1.0\n\
Message-ID: <123@example.com>\n\
Auto-Submitted: auto-generated\n\
Date: Fri, 29 Jan 2021 21:37:55 +0000\n\
\n\
hello\n",
"INBOX",
1,
false,
)
.await?;
let msg = alice.get_last_msg().await;
assert_eq!(msg.get_text().unwrap(), "hello".to_string());
assert!(msg.is_bot());
// Alice receives a message from Bob who is not the bot anymore.
dc_receive_imf(
&alice,
b"From: Bob <bob@example.com>\n\
To: alice@example.com\n\
Chat-Version: 1.0\n\
Message-ID: <456@example.com>\n\
Date: Fri, 29 Jan 2021 21:37:55 +0000\n\
\n\
hello again\n",
"INBOX",
2,
false,
)
.await?;
let msg = alice.get_last_msg().await;
assert_eq!(msg.get_text().unwrap(), "hello again".to_string());
assert!(!msg.is_bot());
Ok(())
}
}