feat: allow adding file info

src/mpd_encoder.rs

@@ -110,7 +110,14 @@ impl MpdEncoder {
         Ok(())
     }
 
-    pub fn add_texture_file(&mut self, file_info: FileInfo, size: usize, mut data: impl Read) -> Result<()> {
+    pub fn add_file_info(&mut self, hash: &[u8], file_info: FileInfo) {
+        self.hashes.entry(hash.to_vec())
+            .and_modify(|info| {
+                info.files.insert(file_info);
+            });
+    }
+
+    pub fn add_texture_file(&mut self, file_info: FileInfo, size: usize, mut data: impl Read) -> Result<Vec<u8>> {
         #[derive(binrw::BinRead)]
         #[br(little)]
         struct RawTextureHeader {
@@ -235,7 +242,7 @@ impl MpdEncoder {
             .insert(file_info);
 
         if contained {
-            return Ok(());
+            return Ok(hash.to_vec());
         }
 
         // write the headers
@@ -263,14 +270,14 @@ impl MpdEncoder {
         // seek past the data
         self.writer.seek(SeekFrom::Start(after_data)).map_err(Error::Io)?;
 
-        Ok(())
+        Ok(hash.to_vec())
     }
 
     fn alignment_necessary(size: usize) -> usize {
         ALIGN - (size % ALIGN)
     }
 
-    pub fn add_model_file(&mut self, file_info: FileInfo, size: usize, mut data: impl Read) -> Result<()> {
+    pub fn add_model_file(&mut self, file_info: FileInfo, size: usize, mut data: impl Read) -> Result<Vec<u8>> {
         #[derive(binrw::BinRead)]
         #[br(little)]
         struct RawModelHeader {
@@ -431,7 +438,7 @@ impl MpdEncoder {
             .insert(file_info);
 
         if contained {
-            return Ok(());
+            return Ok(hash.to_vec());
         }
 
         // write the file header
@@ -452,7 +459,7 @@ impl MpdEncoder {
         // now seek past the data
         self.writer.seek(SeekFrom::Start(after_data)).map_err(Error::Io)?;
 
-        Ok(())
+        Ok(hash.to_vec())
     }
 
     fn write_lod(&mut self, lod: usize, lod_count: u8, offsets: &[u32], sizes: &[u32], mut data: impl Read, hasher: &mut impl Digest) -> Result<Vec<DatStdFileBlockInfos>> {
@@ -486,7 +493,7 @@ impl MpdEncoder {
         num_blocks
     }
 
-    pub fn add_standard_file(&mut self, file_info: FileInfo, size: usize, data: impl Read) -> Result<()> {
+    pub fn add_standard_file(&mut self, file_info: FileInfo, size: usize, data: impl Read) -> Result<Vec<u8>> {
         // store position before doing anything
         let pos = self.writer.stream_position().map_err(Error::Io)?;
 
@@ -524,7 +531,7 @@ impl MpdEncoder {
         self.writer.seek(SeekFrom::Start(pos)).map_err(Error::Io)?;
 
         if contained {
-            return Ok(());
+            return Ok(hash.to_vec());
         }
 
         // add headers
@@ -546,7 +553,7 @@ impl MpdEncoder {
         // seek past data
         self.writer.seek(SeekFrom::Start(after_blocks)).map_err(Error::Io)?;
 
-        Ok(())
+        Ok(hash.to_vec())
     }
 
     fn align_to(&mut self, n: usize) -> Result<usize> {