feat: module application avec render_service et file_service

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src-tauri/src/application/file_service.rs

@@ -0,0 +1,66 @@
+use crate::infrastructure::file_repository;
+use std::path::Path;
+
+#[allow(dead_code)]
+pub fn list_markdown_files(dir: &str) -> Result<Vec<String>, String> {
+    let path = Path::new(dir);
+    if !path.is_dir() {
+        return Err(format!("{dir} n'est pas un dossier"));
+    }
+    let mut files = Vec::new();
+    file_repository::collect_md_files(path, &mut files).map_err(|e| e.to_string())?;
+    files.sort();
+    Ok(files)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::fs;
+
+    fn tmpdir(name: &str) -> std::path::PathBuf {
+        std::env::temp_dir().join(name)
+    }
+
+    #[test]
+    fn list_markdown_files_sorted() {
+        let dir = tmpdir("pena_fs_sorted");
+        fs::create_dir_all(&dir).unwrap();
+        fs::write(dir.join("z.md"), "").unwrap();
+        fs::write(dir.join("a.md"), "").unwrap();
+        fs::write(dir.join("m.md"), "").unwrap();
+        let result = list_markdown_files(dir.to_str().unwrap()).unwrap();
+        fs::remove_dir_all(&dir).unwrap();
+        assert_eq!(result.len(), 3);
+        assert!(result[0] < result[1] && result[1] < result[2]);
+        assert!(result[0].ends_with("a.md"));
+        assert!(result[2].ends_with("z.md"));
+    }
+
+    #[test]
+    fn list_markdown_files_ignores_non_md() {
+        let dir = tmpdir("pena_fs_non_md");
+        fs::create_dir_all(&dir).unwrap();
+        fs::write(dir.join("doc.md"), "").unwrap();
+        fs::write(dir.join("notes.txt"), "").unwrap();
+        let result = list_markdown_files(dir.to_str().unwrap()).unwrap();
+        fs::remove_dir_all(&dir).unwrap();
+        assert_eq!(result.len(), 1);
+        assert!(result[0].ends_with("doc.md"));
+    }
+
+    #[test]
+    fn list_markdown_files_not_a_dir() {
+        let result = list_markdown_files("/nonexistent/pena_fs_dir");
+        assert!(result.is_err());
+    }
+
+    #[test]
+    fn list_markdown_files_empty_dir() {
+        let dir = tmpdir("pena_fs_empty");
+        fs::create_dir_all(&dir).unwrap();
+        let result = list_markdown_files(dir.to_str().unwrap()).unwrap();
+        fs::remove_dir_all(&dir).unwrap();
+        assert_eq!(result.len(), 0);
+    }
+}