feat(media): use file's sha256 for on-disk name & make directory configurable

In addition, metadata about the file, such as creation time, last access, and
file size, are stored in the database

src/service/media/data.rs

@@ -1,22 +1,43 @@
-use ruma::http_headers::ContentDisposition;
+use ruma::ServerName;
+use sha2::{digest::Output, Sha256};
 
 use crate::Result;
 
+use super::DbFileMeta;
+
 pub trait Data: Send + Sync {
     fn create_file_metadata(
         &self,
-        mxc: String,
-        width: u32,
-        height: u32,
-        content_disposition: &ContentDisposition,
+        sha256_digest: Output<Sha256>,
+        file_size: u64,
+        servername: &ServerName,
+        media_id: &str,
+        filename: Option<&str>,
         content_type: Option<&str>,
-    ) -> Result<Vec<u8>>;
+    ) -> Result<()>;
 
-    /// Returns content_disposition, content_type and the metadata key.
-    fn search_file_metadata(
+    fn search_file_metadata(&self, servername: &ServerName, media_id: &str) -> Result<DbFileMeta>;
+
+    #[allow(clippy::too_many_arguments)]
+    fn create_thumbnail_metadata(
         &self,
-        mxc: String,
+        sha256_digest: Output<Sha256>,
+        file_size: u64,
+        servername: &ServerName,
+        media_id: &str,
         width: u32,
         height: u32,
-    ) -> Result<(ContentDisposition, Option<String>, Vec<u8>)>;
+        filename: Option<&str>,
+        content_type: Option<&str>,
+    ) -> Result<()>;
+
+    // Returns the sha256 hash, filename and content_type and whether the media should be accessible via
+    /// unauthenticated endpoints.
+    fn search_thumbnail_metadata(
+        &self,
+        servername: &ServerName,
+        media_id: &str,
+        width: u32,
+        height: u32,
+    ) -> Result<DbFileMeta>;
 }