Move rate limiter into its own crate

Cargo.lock

@@ -918,6 +918,7 @@ dependencies = [
  "r2d2",
  "r2d2_sqlite",
  "rand 0.8.5",
+ "ratelimit",
  "regex",
  "reqwest",
  "rusqlite",
@@ -2878,6 +2879,10 @@ dependencies = [
  "rand_core 0.6.3",
 ]
 
+[[package]]
+name = "ratelimit"
+version = "1.0.0"
+
 [[package]]
 name = "rayon"
 version = "1.5.3"

Cargo.toml

@@ -20,6 +20,7 @@ panic = 'abort'
 [dependencies]
 deltachat_derive = { path = "./deltachat_derive" }
 format-flowed = { path = "./format-flowed" }
+ratelimit = { path = "./deltachat-ratelimit" }
 
 ansi_term = { version = "0.12.1", optional = true }
 anyhow = "1"
@@ -101,6 +102,7 @@ members = [
   "deltachat_derive",
   "deltachat-jsonrpc",
   "deltachat-rpc-server",
+  "deltachat-ratelimit",
   "format-flowed",
 ]
 

deltachat-ratelimit/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "ratelimit"
+version = "1.0.0"
+description = "Token bucket implementation"
+edition = "2021"
+license = "MPL-2.0"
+
+[dependencies]

deltachat-ratelimit/src/lib.rs

@@ -7,7 +7,7 @@
 use std::time::{Duration, SystemTime};
 
 #[derive(Debug)]
-pub(crate) struct Ratelimit {
+pub struct Ratelimit {
     /// Time of the last update.
     last_update: SystemTime,
 
@@ -25,7 +25,7 @@ impl Ratelimit {
     /// Returns a new rate limiter with the given constraints.
     ///
     /// Rate limiter will allow to send no more than `quota` messages within duration `window`.
-    pub(crate) fn new(window: Duration, quota: f64) -> Self {
+    pub fn new(window: Duration, quota: f64) -> Self {
         Self::new_at(window, quota, SystemTime::now())
     }
 
@@ -57,7 +57,7 @@ impl Ratelimit {
     /// Returns true if can send another message now.
     ///
     /// This method takes mutable reference
-    pub(crate) fn can_send(&self) -> bool {
+    pub fn can_send(&self) -> bool {
         self.can_send_at(SystemTime::now())
     }
 
@@ -71,7 +71,7 @@ impl Ratelimit {
     /// It is possible to send message even if over quota, e.g. if the message sending is initiated
     /// by the user and should not be rate limited. However, sending messages when over quota
     /// further postpones the time when it will be allowed to send low priority messages.
-    pub(crate) fn send(&mut self) {
+    pub fn send(&mut self) {
         self.send_at(SystemTime::now())
     }
 
@@ -87,7 +87,7 @@ impl Ratelimit {
     }
 
     /// Calculates the time until `can_send` will return `true`.
-    pub(crate) fn until_can_send(&self) -> Duration {
+    pub fn until_can_send(&self) -> Duration {
         self.until_can_send_at(SystemTime::now())
     }
 }

src/context.rs

@@ -11,6 +11,7 @@ use std::time::{Duration, Instant, SystemTime};
 
 use anyhow::{ensure, Result};
 use async_channel::{self as channel, Receiver, Sender};
+use ratelimit::Ratelimit;
 use tokio::sync::{Mutex, RwLock};
 
 use crate::chat::{get_chat_cnt, ChatId};
@@ -22,7 +23,6 @@ use crate::key::{DcKey, SignedPublicKey};
 use crate::login_param::LoginParam;
 use crate::message::{self, MessageState, MsgId};
 use crate::quota::QuotaInfo;
-use crate::ratelimit::Ratelimit;
 use crate::scheduler::Scheduler;
 use crate::sql::Sql;
 use crate::stock_str::StockStrings;

src/lib.rs

@@ -103,7 +103,6 @@ mod color;
 pub mod html;
 mod net;
 pub mod plaintext;
-mod ratelimit;
 pub mod summary;
 
 pub mod receive_imf;