From ae0451f7d72e78fdeb317db397fb602a29eda17a Mon Sep 17 00:00:00 2001
From: Maybe Waffle <waffle.lapkin@gmail.com>
Date: Sat, 29 Jul 2023 14:09:09 +0400
Subject: [PATCH] Add `UserId::{MIN, MAX}` constants

---
 crates/teloxide-core/CHANGELOG.md         | 1 +
 crates/teloxide-core/src/types/chat_id.rs | 4 ++--
 crates/teloxide-core/src/types/user_id.rs | 8 +++++++-
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/crates/teloxide-core/CHANGELOG.md b/crates/teloxide-core/CHANGELOG.md
index 48216103..6cfbee78 100644
--- a/crates/teloxide-core/CHANGELOG.md
+++ b/crates/teloxide-core/CHANGELOG.md
@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `ThreadId` newtype over `MessageId`, used for identifying reply threads ([#887][pr887])
 - `ChatId::as_user` ([#905][pr905])
 - Implement `PartialEq<ChatId> for UserId` and `PartialEq<UserId> for ChatId` ([#905][pr905])
+- `ChatId::{MIN, MAX}` ([#905][pr905])
 
 [pr851]: https://github.com/teloxide/teloxide/pull/851
 [pr887]: https://github.com/teloxide/teloxide/pull/887
diff --git a/crates/teloxide-core/src/types/chat_id.rs b/crates/teloxide-core/src/types/chat_id.rs
index f9cdb32c..336d3f91 100644
--- a/crates/teloxide-core/src/types/chat_id.rs
+++ b/crates/teloxide-core/src/types/chat_id.rs
@@ -107,8 +107,8 @@ const MIN_MARKED_CHANNEL_ID: i64 = -1997852516352;
 const MAX_MARKED_CHANNEL_ID: i64 = -1000000000000;
 const MIN_MARKED_CHAT_ID: i64 = MAX_MARKED_CHANNEL_ID + 1;
 const MAX_MARKED_CHAT_ID: i64 = MIN_USER_ID - 1;
-const MIN_USER_ID: i64 = 0;
-const MAX_USER_ID: i64 = (1 << 40) - 1;
+pub(crate) const MIN_USER_ID: i64 = 0;
+pub(crate) const MAX_USER_ID: i64 = (1 << 40) - 1;
 
 #[cfg(test)]
 mod tests {
diff --git a/crates/teloxide-core/src/types/user_id.rs b/crates/teloxide-core/src/types/user_id.rs
index 625a1691..4c102a36 100644
--- a/crates/teloxide-core/src/types/user_id.rs
+++ b/crates/teloxide-core/src/types/user_id.rs
@@ -1,6 +1,6 @@
 use serde::{Deserialize, Serialize};
 
-use crate::types::ChatId;
+use crate::types::{ChatId, MAX_USER_ID, MIN_USER_ID};
 
 /// Identifier of a user.
 #[derive(Clone, Copy)]
@@ -52,6 +52,12 @@ impl UserId {
 
         self == TELEGRAM_USER_ID
     }
+
+    /// The smallest user id that could possibly be returned by Telegram.
+    pub const MIN: Self = Self(MIN_USER_ID as u64);
+
+    /// The largest user id that could possibly be returned by Telegram.
+    pub const MAX: Self = Self(MAX_USER_ID as u64);
 }
 
 impl PartialEq<ChatId> for UserId {