commit ff16f76c574927171d00c72622f4f891f5987b19
Author: Vasiliy Petrov <cofob@riseup.net>
Date:   Fri Jun 10 20:11:31 2022 +0000

    Initial commit

diff --git a/.build.yml b/.build.yml
new file mode 100644
index 0000000..5077f99
--- /dev/null
+++ b/.build.yml
@@ -0,0 +1,20 @@
+image: alpine/latest
+packages:
+  - curl
+sources:
+  - https://git.sr.ht/~cofob/matrix-dnsbot
+triggers:
+  - action: email
+    condition: failure
+    to: failure@cofob.ru
+tasks:
+  - install: |
+      curl https://sh.rustup.rs -sSf | sh -s -- -y -q --default-toolchain nightly --profile minimal
+  - check: |
+      source $HOME/.cargo/env
+      cd matrix-dnsbot
+      cargo c
+  - test: |
+      source $HOME/.cargo/env
+      cd matrix-dnsbot
+      cargo test
diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..f4d28a3
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+rustflags = ["-C", "link-arg=-fuse-ld=lld"]
diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
new file mode 100644
index 0000000..5061df4
--- /dev/null
+++ b/.devcontainer/Dockerfile
@@ -0,0 +1,8 @@
+ARG VARIANT="buster"
+FROM mcr.microsoft.com/vscode/devcontainers/rust:0-${VARIANT}
+
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+   && apt-get -y install clang lld \
+   && apt-get autoremove -y && apt-get clean -y \
+   && su vscode -c "rustup component add clippy rust-analysis rust-src rls"
+
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..857ddaf
--- /dev/null
+++ b/.devcontainer/devcontainer.json
@@ -0,0 +1,37 @@
+{
+	"name": "Rust",
+	"build": {
+		"dockerfile": "Dockerfile",
+		"args": {
+			"VARIANT": "bullseye"
+		}
+	},
+	"runArgs": [
+		"--cap-add=SYS_PTRACE",
+		"--security-opt",
+		"seccomp=unconfined"
+	],
+
+	"settings": {
+		"lldb.executable": "/usr/bin/lldb",
+		"files.watcherExclude": {
+			"**/target/**": true
+		},
+		"rust-analyzer.checkOnSave.command": "clippy"
+	},
+
+	"extensions": [
+		"vadimcn.vscode-lldb",
+		"mutantdino.resourcemonitor",
+		"matklad.rust-analyzer",
+		"tamasfe.even-better-toml",
+		"serayuzgur.crates",
+		"EditorConfig.EditorConfig",
+		"rust-lang.rust-analyzer"
+	],
+
+	"remoteUser": "vscode",
+	"features": {
+		"git": "os-provided"
+	}
+}
diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..3053461
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,16 @@
+# This is the main config file for this project:
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+
+[*.rs]
+indent_style = tab
+
+[*.md]
+trim_trailing_whitespace = false
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..19a1e1f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,46 @@
+# Compiled files and executables
+debug/
+target/
+
+# Our data
+db/
+
+# Rocket specific
+Rocket.toml
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# Jetbrains IDE
+.idea/
+
+# VisualStudioCode
+.history
+.ionide
+
+# Windows
+$RECYCLE.BIN/
+[Dd]esktop.ini
+*.lnk
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+
+# Environments
+.env
+
+# Example files
+!*.example
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+# KDE directory preferences
+.directory
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..e27198e
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,42 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "lldb",
+            "request": "launch",
+            "name": "Debug executable 'dnsbot'",
+            "cargo": {
+                "args": [
+                    "build",
+                    "--bin=dnsbot",
+                    "--package=dnsbot"
+                ],
+                "filter": {
+                    "name": "dnsbot",
+                    "kind": "bin"
+                }
+            },
+            "args": [],
+            "cwd": "${workspaceFolder}"
+        },
+        {
+            "type": "lldb",
+            "request": "launch",
+            "name": "Debug unit tests in executable 'dnsbot'",
+            "cargo": {
+                "args": [
+                    "test",
+                    "--no-run",
+                    "--bin=dnsbot",
+                    "--package=dnsbot"
+                ],
+                "filter": {
+                    "name": "dnsbot",
+                    "kind": "bin"
+                }
+            },
+            "args": [],
+            "cwd": "${workspaceFolder}"
+        }
+    ]
+}
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..92a87c3
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1 @@
+# So far, it's empty.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..96fae94
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,19 @@
+# Guide to making a contribution
+
+## Workspace setup
+
+We recommend using our [devcontainer](https://code.visualstudio.com/docs/remote/containers) for [VS Code](https://code.visualstudio.com/).
+
+Of course, you can also use your favorite IDE.
+
+Requirements:
+ - Rust
+ - Cargo
+ - Git
+ - [EditorConfig](https://editorconfig.org/) support in IDE
+
+## Sending issues & patches
+
+You can send your issues `@cofob:matrix.org` or `cofob at riseup.net` via email.
+
+## Thanks for your interest in the project!
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new file mode 100644
index 0000000..3730801
--- /dev/null
+++ b/Cargo.lock
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+# It is not intended for manual editing.
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0120db82e8a1e0b9fb3345a539c478767c0048d842860994d96113d5b667bd69"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "winreg"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80d0f4e272c85def139476380b12f9ac60926689dd2e01d4923222f40580869d"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "x25519-dalek"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2392b6b94a576b4e2bf3c5b2757d63f10ada8020a2e4d08ac849ebcf6ea8e077"
+dependencies = [
+ "curve25519-dalek",
+ "rand_core 0.5.1",
+ "serde",
+ "zeroize",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4756f7db3f7b5574938c3eb1c117038b8e07f95ee6718c0efad4ac21508f1efd"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f8f187641dad4f680d25c4bfc4225b418165984179f26ca76ec4fb6441d3a17"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..90fcaae
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,40 @@
+[package]
+name = "dnsbot"
+version = "0.1.0"
+edition = "2021"
+authors = ["cofob <cofob@riseup.net>"]
+description = "DNS resolver in matrix"
+readme = "README.md"
+repository = "https://git.sr.ht/~cofob/matrix-dnsbot"
+homepage = "https://sr.ht/~cofob/matrix-dnsbot"
+license = "AGPL-3.0-or-later"
+keywords = ["dns", "matrix", "bot"]
+
+[dependencies]
+matrix-sdk = { version = "^0.5", features = ["sled", "anyhow", "e2e-encryption"] }
+matrix-sdk-sled = "^0.1"
+tokio = { version = "1.19.2", features = ["full"] }
+log = "^0.4"
+dotenv = "^0.15"
+anyhow = "^1"
+regex = "^1"
+lazy_static = "^1.4"
+tracing-subscriber = "^0.3"
+pretty_env_logger = "^0.4"
+async-std-resolver = "^0.21"
+
+[profile.dev]
+codegen-units = 256
+incremental = true
+opt-level = 0
+debug = true
+
+[profile.release]
+debug-assertions = false
+overflow-checks = false
+incremental = false
+opt-level = 3
+panic = 'unwind'
+debug = false
+strip = true
+lto = true
diff --git a/DONATE.md b/DONATE.md
new file mode 100644
index 0000000..fed75eb
--- /dev/null
+++ b/DONATE.md
@@ -0,0 +1,8 @@
+# Financial development support
+
+> If you only have fiat currency, then you can exchange it to XMR directly on my address.
+
+> Money fully will go to cofob.
+
+I only accept donations to these cryptocurrency addresses:
+- Monero - `89GiMGqs7LuZq9jALq1ZPRK9VUvY4PhtmcFvbDRm334Acx3qH99HVENjf6NCYX5GXb8PLpLMfVBPQKXFwaujX3xX7uc2KBe`
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..be3f7b2
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..fce1d8c
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# matrix-dnsbot
+
+DNS resolver in matrix. Just invite `@dnsbot:matrix.org` in your 1:1 or group chat.
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..dfdcdde
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,181 @@
+extern crate dotenv;
+
+use std::env;
+use std::time::Instant;
+use dotenv::dotenv;
+use matrix_sdk::{
+	config::SyncSettings, room::Room,
+	ruma::events::room::{
+		member::StrippedRoomMemberEvent,
+		message::{
+			OriginalSyncRoomMessageEvent, TextMessageEventContent, MessageType, RoomMessageEventContent
+		}
+	}, Client,
+};
+use tokio::time::{sleep, Duration};
+use log::{info, debug};
+use regex::Regex;
+use lazy_static::lazy_static;
+use async_std_resolver::resolver_from_system_conf;
+
+async fn on_room_message(event: OriginalSyncRoomMessageEvent, room: Room) {
+	lazy_static! {
+		static ref RE: Regex = Regex::new("resolve ([a-z\\._0-9]+\\.[a-z]+)").unwrap();
+	}
+
+	if let Room::Joined(room) = room {
+		let mut msg_body = match event.content.msgtype {
+			MessageType::Text(TextMessageEventContent { body, .. }) => body,
+			_ => return,
+		};
+
+		msg_body = msg_body.to_lowercase();
+
+		if msg_body.contains("resolve help") {
+			let content = RoomMessageEventContent::text_html(
+				"Just send 'resolve (domain)'. 'resolve source' to get the code.",
+				"Just send <code>resolve (domain)</code>. <code>resolve source</code> to get the code.");
+			room.send(content, None).await.unwrap();
+		} else if msg_body.contains("resolve source") {
+			let content = RoomMessageEventContent::text_plain("https://git.sr.ht/~cofob/matrix-dnsbot");
+			room.send(content, None).await.unwrap();
+		} else if msg_body.contains("resolve") {
+			let caps = RE.captures(&msg_body);
+			match caps {
+				Some(cap) => {
+					let start = Instant::now();
+					let domain = cap.get(1).unwrap().as_str();
+					let resolver = resolver_from_system_conf().await.unwrap();
+					let lookup = resolver.lookup_ip(domain).await;
+					if lookup.is_ok() {
+						let lookup = lookup.unwrap();
+						if lookup.iter().count() == 0 {
+							let content = RoomMessageEventContent::text_plain("empty");
+							room.send(content, None).await.unwrap();
+							return;
+						}
+
+						let mut plain_answer = String::from("IP record");
+						let mut answer = String::from("IP record");
+
+						if lookup.iter().count() > 1 {
+							// lets goooo shitcode
+							plain_answer.push_str("s for ");
+							plain_answer.push_str(domain);
+							plain_answer.push_str(":");
+							answer.push_str("s for <code>");
+							answer.push_str(domain);
+							answer.push_str("</code>:");
+						} else {
+							plain_answer.push_str(" for ");
+							plain_answer.push_str(domain);
+							plain_answer.push_str(":");
+							answer.push_str(" for <code>");
+							answer.push_str(domain);
+							answer.push_str("</code>:");
+						}
+
+						for ip in lookup {
+							plain_answer.push_str(" '");
+							plain_answer.push_str(&ip.to_string());
+							plain_answer.push_str("';");
+							answer.push_str(" <code>");
+							answer.push_str(&ip.to_string());
+							answer.push_str("</code>;");
+						}
+						let end = Instant::now();
+						let delta = end - start;
+						plain_answer.push_str(" That took ");
+						plain_answer.push_str(&delta.as_millis().to_string());
+						plain_answer.push_str(" ms.");
+						answer.push_str(" That took <code>");
+						answer.push_str(&delta.as_millis().to_string());
+						answer.push_str("</code> ms.");
+						let content = RoomMessageEventContent::text_html(plain_answer, answer);
+						room.send(content, None).await.unwrap();
+					} else {
+						let content = RoomMessageEventContent::text_plain("Unexpected error occured. Most likely, the domain simply does not have IP records.");
+						room.send(content, None).await.unwrap();
+					}
+				}
+    		_ => debug!("regex not found"),
+			}
+		} else if room.is_direct() {
+			let content = RoomMessageEventContent::text_plain("I dont understand you! Send `resolve help` to get help.");
+			room.send(content, None).await.unwrap();
+		}
+	}
+}
+
+async fn on_stripped_state_member(
+	room_member: StrippedRoomMemberEvent,
+	client: Client,
+	room: Room,
+) {
+	if room_member.state_key != client.user_id().await.unwrap() {
+		return;
+	}
+
+	if let Room::Invited(room) = room {
+		info!("Autojoining room {}", room.room_id());
+		let mut delay = 2;
+
+		while let Err(err) = room.accept_invitation().await {
+			info!("Failed to join room {} ({:?}), retrying in {}s", room.room_id(), err, delay);
+
+			sleep(Duration::from_secs(delay)).await;
+			delay *= 2;
+
+			if delay > 3600 {
+				info!("Can't join room {} ({:?})", room.room_id(), err);
+				break;
+			}
+		}
+		info!("Successfully joined room {}", room.room_id());
+	}
+}
+
+async fn login_and_sync(
+	homeserver_url: String,
+	username: &str,
+	password: &str,
+) -> anyhow::Result<()> {
+	#[allow(unused_mut)]
+	let mut client_builder = Client::builder().homeserver_url(homeserver_url);
+
+	let state_store = matrix_sdk_sled::StateStore::open_with_path(env::var("DB")
+		.unwrap_or_else(|_| "./db/".to_string()))?;
+	let crypto_store = matrix_sdk_sled::CryptoStore::open_with_passphrase(env::var("DB")
+		.unwrap_or_else(|_| "./db/".to_string()), Some("passphrase"))?;
+
+	client_builder = client_builder.state_store(Box::new(state_store)).crypto_store(Box::new(crypto_store));
+
+	let client = client_builder.build().await?;
+
+	let response = client.login(username, password, Some("bot"), Some(&env::var("SESSION_NAME")
+		.unwrap_or_else(|_| "bot".to_string()))).await?;
+
+	info!("logged in as {}", response.user_id);
+
+	client.register_event_handler(on_stripped_state_member).await;
+	client.register_event_handler(on_room_message).await;
+
+	client.sync(SyncSettings::default()).await;
+
+	Ok(())
+}
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+	tracing_subscriber::fmt::init();
+
+	dotenv().ok();
+
+	let (homeserver_url, username, password) = (
+		env::var("HOMESERVER").expect("HOMESERVER variable is"),
+		env::var("USERNAME").expect("USERNAME variable is"),
+		env::var("PASSWORD").expect("PASSWORD variable is"));
+
+	login_and_sync(homeserver_url, &username, &password).await?;
+	Ok(())
+}