From e1773edf7f9e763e054cd92e24d0a06fe52d15fe Mon Sep 17 00:00:00 2001
From: Alexander Krotov <ilabdsf@gmail.com>
Date: Mon, 6 Jan 2020 08:03:09 +0100
Subject: [PATCH] Send system message to chat when user changes autodelete
 timer

---
 src/chat.rs           | 36 +++++++++++++++++++++++++++++++++---
 src/dc_receive_imf.rs |  2 +-
 2 files changed, 34 insertions(+), 4 deletions(-)

diff --git a/src/chat.rs b/src/chat.rs
index 2a9b5cef5..5d8f88da1 100644
--- a/src/chat.rs
+++ b/src/chat.rs
@@ -2582,10 +2582,15 @@ pub fn get_autodelete_timer(context: &Context, chat_id: ChatId) -> u32 {
         .unwrap_or_default()
 }
 
-/// Set autodelete timer value in seconds.
+/// Set autodelete timer value without sending a message.
 ///
-/// If timer value is 0, disable autodelete timer.
-pub fn set_autodelete_timer(context: &Context, chat_id: ChatId, timer: u32) -> Result<(), Error> {
+/// Used when a message arrives indicating that someone else has
+/// changed the timer value for a chat.
+pub(crate) fn inner_set_autodelete_timer(
+    context: &Context,
+    chat_id: ChatId,
+    timer: u32,
+) -> Result<(), Error> {
     context.sql.execute(
         "UPDATE chats
          SET autodelete_timer=?
@@ -2595,6 +2600,31 @@ pub fn set_autodelete_timer(context: &Context, chat_id: ChatId, timer: u32) -> R
     Ok(())
 }
 
+/// Set autodelete timer value in seconds.
+///
+/// If timer value is 0, disable autodelete timer.
+pub fn set_autodelete_timer(context: &Context, chat_id: ChatId, timer: u32) -> Result<(), Error> {
+    if timer == get_autodelete_timer(context, chat_id) {
+        return Ok(());
+    }
+    inner_set_autodelete_timer(context, chat_id, timer)?;
+    let mut msg = Message::new(Viewtype::Text);
+    msg.text = Some(context.stock_system_msg(
+        StockMessage::MsgAutodeleteTimerChanged,
+        timer.to_string(),
+        "",
+        0,
+    ));
+    msg.param.set_cmd(SystemMessage::AutodeleteTimerChanged);
+    if let Err(err) = send_msg(context, chat_id, &mut msg) {
+        warn!(
+            context,
+            "Failed to send a message about autodelete timer change: {:?}", err
+        );
+    }
+    Ok(())
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/src/dc_receive_imf.rs b/src/dc_receive_imf.rs
index e3ff4fff6..99d662d5e 100644
--- a/src/dc_receive_imf.rs
+++ b/src/dc_receive_imf.rs
@@ -217,7 +217,7 @@ pub fn dc_receive_imf(
     };
 
     if chat::get_autodelete_timer(context, chat_id) != timer {
-        match chat::set_autodelete_timer(context, chat_id, timer) {
+        match chat::inner_set_autodelete_timer(context, chat_id, timer) {
             Ok(()) => {
                 let stock_str = context.stock_system_msg(
                     StockMessage::MsgAutodeleteTimerChanged,