Initial code dump: matrix feedbot, aka bender

This is a rewrite of our old feedbot in rust, heavily inspired from
rek2's INN matrix bot and making use of some bits from matrix-rust-sdk

This is an asynchronous tokio-based matrix client using a stateless feed
fetcher implementation based on reqwest, it uses feed_rs for parsing RSS
and Atom feeds. State persistence is achieved using a simple file-backed
datastore with serde_yaml as a serialization format.

Published under the GNU General Public License version 3 or later.

src/config.rs

@@ -0,0 +1,46 @@
+/**
+ * matrix-feedbot v0.1.0
+ *
+ * Copyright (C) 2024 The 1312 Media Collective
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+use serde::Deserialize;
+use std::error::Error;
+use std::fs;
+
+#[derive(Deserialize, Clone, Debug)]
+pub struct FeedConfig {
+    pub url: String,
+    pub rooms: Vec<String>,
+    pub delay: u64
+}
+
+#[derive(Deserialize, Debug)]
+pub struct Config {
+    pub default_room: String,
+    pub feeds: Vec<FeedConfig>,
+    pub username: String,
+    pub password: String,
+    pub homeserver_uri: String
+}
+
+impl Config {
+    pub fn load(config_file: &str) -> Result<Self, Box<dyn Error>> {
+        let serialized_config = fs::read_to_string(config_file)?;
+        let config: Config = serde_yaml::from_str(&serialized_config)?;
+        Ok(config)
+    }
+}