Create destination folder

src/utils/user_data_utils.rs

@@ -3,10 +3,42 @@
 //! @author Pierre Hubert
 
 use crate::data::config::conf;
+use crate::data::error::ResultBoxError;
+use crate::data::user::UserID;
+use std::path::{Path, PathBuf};
+use serde_json::to_string;
 
 /// Get the full URL to a user data file
 ///
 /// `uri` should contain the path to the target resource
 pub fn user_data_url(uri: &str) -> String {
     format!("{}{}", conf().storage_url, uri)
+}
+
+/// Get the system path to a user data file
+pub fn user_data_path(uri: &Path) -> PathBuf {
+    Path::new(conf().storage_path.as_str()).join(uri)
+}
+
+/// Prepare the creation of a file (user data file)
+///
+/// This function returns the relative folder path in user data directory where the file can be
+/// created
+pub fn prepare_file_creation(user_id: UserID, folder: &str) -> ResultBoxError<PathBuf> {
+    let subfolder = match user_id {
+        0 => Path::new(folder).to_path_buf(),
+        id => Path::new(folder).join(to_string(&id)?)
+    };
+
+    let full_path = user_data_path(subfolder.as_path());
+
+    if !full_path.exists() {
+        // Create the directory
+        std::fs::create_dir_all(&full_path)?;
+
+        // Block directory listing
+        std::fs::write(&full_path.join("index.html"), "<b>No listing.</b>")?;
+    }
+
+    Ok(subfolder)
 }