feat(services/autumn): file uploads

feat(services/autumn): deduplicate uploads
feat(services/autumn): ClamAV support

crates/services/autumn/src/clamav.rs

@@ -0,0 +1,49 @@
+use std::time::Duration;
+
+use revolt_config::{config, report_internal_error};
+use revolt_result::Result;
+
+/// Initialise ClamAV
+pub async fn init() {
+    let config = config().await;
+
+    if !config.files.clamd_host.is_empty() {
+        tracing::info!("Waiting for clamd to be ready...");
+
+        loop {
+            let clamd_available =
+                match revolt_clamav_client::ping_tcp(config.files.clamd_host.clone()) {
+                    Ok(ping_response) => ping_response == b"PONG\0",
+                    Err(_) => false,
+                };
+
+            if clamd_available {
+                tracing::info!("clamd is ready, virus protection enabled!");
+                break;
+            } else {
+                tracing::error!(
+                    "Could not ping clamd host at {}, retrying in 10 seconds...",
+                    config.files.clamd_host
+                );
+
+                std::thread::sleep(Duration::from_secs(10));
+            }
+        }
+    }
+}
+
+/// Scan for malware
+pub async fn is_malware(buf: &[u8]) -> Result<bool> {
+    let config = config().await;
+    if config.files.clamd_host.is_empty() {
+        Ok(false)
+    } else {
+        let scan_response = report_internal_error!(revolt_clamav_client::scan_buffer_tcp(
+            buf,
+            config.files.clamd_host,
+            None
+        ))?;
+
+        report_internal_error!(revolt_clamav_client::clean(&scan_response)).map(|v| !v)
+    }
+}