Can perform basic file copy

virtweb_backend/src/utils/file_disks_utils.rs

@@ -1,7 +1,8 @@
+use crate::app_config::AppConfig;
 use crate::constants;
 use crate::utils::file_size_utils::FileSize;
 use std::os::linux::fs::MetadataExt;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use std::process::Command;
 use std::time::UNIX_EPOCH;
 
@@ -11,9 +12,11 @@ enum DisksError {
     Parse(&'static str),
     #[error("DiskCreateError")]
     Create,
+    #[error("DiskConvertError: {0}")]
+    Convert(String),
 }
 
-#[derive(Debug, serde::Serialize, serde::Deserialize, Copy, Clone)]
+#[derive(Debug, serde::Serialize, serde::Deserialize, Copy, Clone, PartialEq, Eq)]
 #[serde(tag = "format")]
 pub enum DiskFileFormat {
     Raw {
@@ -42,6 +45,7 @@ impl DiskFileFormat {
 /// Disk file information
 #[derive(serde::Serialize)]
 pub struct DiskFileInfo {
+    pub file_path: PathBuf,
     pub file_size: FileSize,
     #[serde(flatten)]
     pub format: DiskFileFormat,
@@ -83,6 +87,7 @@ impl DiskFileInfo {
         };
 
         Ok(Self {
+            file_path: file.to_path_buf(),
             name,
             file_size: FileSize::from_bytes(metadata.len() as usize),
             format,
@@ -145,7 +150,62 @@ impl DiskFileInfo {
 
     /// Copy / convert file disk image into a new destination with optionally a new file format
     pub fn convert(&self, dest_file: &Path, dest_format: DiskFileFormat) -> anyhow::Result<()> {
-        todo!()
+        // Create a temporary directory to perform the operation
+        let temp_dir = tempfile::tempdir_in(&AppConfig::get().temp_dir)?;
+        let temp_file = temp_dir.path().join("temp_file");
+
+        // Prepare the conversion
+        let mut cmd = match (self.format, dest_format) {
+            // Dumb copy of file
+            (a, b) if a == b => {
+                let mut cmd = Command::new(constants::COPY_PROGRAM);
+                cmd.arg("--sparse=auto")
+                    .arg(&self.file_path)
+                    .arg(&temp_file);
+                cmd
+            }
+
+            // By default, conversion is unsupported
+            (src, dest) => {
+                return Err(DisksError::Convert(format!(
+                    "Conversion from {src:?} to {dest:?} is not supported!"
+                ))
+                .into());
+            }
+        };
+
+        // Execute the conversion
+        let command_s = format!(
+            "{} {}",
+            cmd.get_program().display(),
+            cmd.get_args()
+                .map(|a| format!("'{}'", a.display()))
+                .collect::<Vec<String>>()
+                .join(" ")
+        );
+        let cmd_output = cmd.output()?;
+        if !cmd_output.status.success() {
+            return Err(DisksError::Convert(format!(
+                "Command failed:\n{command_s}\nStatus: {}\nstdout: {}\nstderr: {}",
+                cmd_output.status,
+                String::from_utf8_lossy(&cmd_output.stdout),
+                String::from_utf8_lossy(&cmd_output.stderr)
+            ))
+            .into());
+        }
+
+        // Check the file was created
+        if !temp_file.is_file() {
+            return Err(DisksError::Convert(
+                "Temporary was not created after execution of command!".to_string(),
+            )
+            .into());
+        }
+
+        // Move the file to its final location
+        std::fs::rename(temp_file, dest_file)?;
+
+        Ok(())
     }
 }