Can update the list of members of the conversation

src/controllers/conversations_controller.rs

@@ -71,18 +71,27 @@ pub fn update_settings(r: &mut HttpRequestHandler) -> RequestResult {
         conversations_helper::set_following(
             r.user_id()?,
             conv_id,
-            r.post_bool("following")?
+            r.post_bool("following")?,
         )?;
     }
 
     // Update members list
     if r.has_post_parameter("members") {
-        let members = r.post_numbers_list("members", 1);
+        let mut members = r.post_numbers_list("members", 1)?;
         let can_everyone_add_members = conversations_helper::can_everyone_add_members(conv_id)?;
 
         if !is_moderator && !can_everyone_add_members {
             r.forbidden("You can not update the list of members of this conversation!".to_string())?;
         }
+
+        if !members.contains(&r.user_id()?) {
+            members.push(r.user_id()?);
+        }
+
+        conversations_helper::set_members(
+            conv_id,
+            &members,
+            can_everyone_add_members)?;
     }
 
     r.success("Conversation information successfully updated!")

src/helpers/conversations_helper.rs

@@ -49,6 +49,14 @@ pub fn add_member(conv_id: u64, user_id: UserID, following: bool) -> ResultBoxEr
     Ok(())
 }
 
+/// Remove a member from a conversation
+pub fn remove_member(conv_id: u64, user_id: UserID) -> ResultBoxError<()> {
+    database::DeleteQuery::new(CONV_USERS_TABLE)
+        .cond_u64("conv_id", conv_id)
+        .cond_user_id("user_id", user_id)
+        .exec()
+}
+
 /// Get the list of conversations of a specific user
 pub fn get_list_user(user_id: UserID) -> ResultBoxError<Vec<Conversation>> {
     database::QueryInfo::new(CONV_LIST_TABLE)
@@ -132,6 +140,33 @@ pub fn set_following(user_id: UserID, conv_id: u64, following: bool) -> ResultBo
         .exec()
 }
 
+/// Set a new list of members for a given conversation
+pub fn set_members(conv_id: u64, new_list: &Vec<UserID>, can_delete: bool) -> ResultBoxError<()> {
+    let curr_list = get_list_members(conv_id)?;
+
+    // Add new members
+    for member in new_list {
+        if curr_list.contains(member) {
+            continue;
+        }
+
+        add_member(conv_id, member.clone(), true)?;
+    }
+
+    if can_delete {
+        for member in curr_list {
+            if new_list.contains(&member) {
+                continue;
+            }
+
+            remove_member(conv_id, member)?;
+        }
+    }
+
+
+    Ok(())
+}
+
 /// Turn a database entry into a ConversationInfo object
 fn db_to_conversation_info(row: &database::RowResult) -> ResultBoxError<Conversation> {
     let conv_id = row.get_u64("id")?;

src/helpers/database.rs

@@ -506,6 +506,21 @@ impl DeleteQuery {
         self.conditions.insert(key.to_string(), Value::from(value));
         self
     }
+
+    pub fn cond_u64(mut self, key: &str, value: u64) -> DeleteQuery {
+        self.conditions.insert(key.to_string(), Value::from(value));
+        self
+    }
+
+    pub fn cond_user_id(mut self, key: &str, value: UserID) -> DeleteQuery {
+        self.conditions.insert(key.to_string(), Value::from(value));
+        self
+    }
+
+    /// Execute the delete query
+    pub fn exec(self) -> ResultBoxError<()> {
+        delete(self)
+    }
 }
 
 /// Delete an entry from the database