1 files changed, 135 insertions, 0 deletions
diff --git a/src/pkgtoolkit/index.rs b/src/pkgtoolkit/index.rs
new file mode 100644
index 0000000..37e02e4
--- /dev/null
+++ b/src/pkgtoolkit/index.rs
@@ -0,0 +1,135 @@
+use std::{
+    fs::{self, File, create_dir_all},
+    io,
+    path::Path,
+};
+
+use flate2::read::GzDecoder;
+use tar::Archive;
+use toml;
+
+use super::types::{Index, Install, Package};
+
+#[allow(dead_code)]
+pub trait IndexOperations {
+    fn gen_index(repo_path: &str) -> Result<bool, std::io::Error>;
+}
+
+impl IndexOperations for Package {
+    /// Generates an INDEX.toml file for a given repository directory.
+    ///
+    /// This function scans the `repo_path` directory for `.mesk` files.
+    /// For each `.mesk` file found, it extracts the `INSTALL` metadata to get package details.
+    /// It then collects all package information and serializes it into an `INDEX.toml` file
+    /// located in the root of the `repo_path` directory.
+    /// If `license` or `descr` fields are missing in the `INSTALL` file, they are set to empty strings ("").
+    ///
+    /// # Arguments
+    /// * `repo_path` - A string slice representing the path to the repository directory.
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if:
+    /// - The `repo_path` directory cannot be read.
+    /// - An `.mesk` file cannot be opened or read.
+    /// - The `INSTALL` file cannot be extracted from an archive.
+    /// - The `INSTALL` file content cannot be parsed as TOML.
+    /// - The final `INDEX.toml` file cannot be written to disk.
+    fn gen_index(repo_path: &str) -> Result<bool, std::io::Error> {
+        let repo_dir = Path::new(repo_path);
+        if !repo_dir.is_dir() {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::NotFound,
+                format!("Repository directory does not exist: {}", repo_path),
+            ));
+        }
+
+        let mut all_packages = Vec::new();
+
+        for entry_res in fs::read_dir(repo_path)? {
+            let entry = entry_res?;
+            let path = entry.path();
+
+            if path.extension().and_then(|s| s.to_str()) == Some("mesk") {
+                log::info!("Processing archive for index: {}", path.display());
+
+                let temp_extract_dir = std::env::temp_dir().join(format!(
+                    "mesk_index_temp_{}",
+                    path.file_stem().unwrap_or_default().to_string_lossy()
+                ));
+                create_dir_all(&temp_extract_dir)?;
+
+                let file = File::open(&path)?;
+                let gz = GzDecoder::new(file);
+                let mut archive = Archive::new(gz);
+
+                for tar_entry_res in archive.entries()? {
+                    let mut tar_entry = tar_entry_res?;
+                    let entry_path = tar_entry.path()?;
+                    if entry_path.file_name().and_then(|n| n.to_str()) == Some("INSTALL") {
+                        if let Some(parent_name) = entry_path
+                            .parent()
+                            .and_then(|p| p.file_name())
+                            .and_then(|n| n.to_str())
+                        {
+                            let install_extract_path =
+                                temp_extract_dir.join(parent_name).join("INSTALL");
+                            if let Some(parent_dir) = install_extract_path.parent() {
+                                create_dir_all(parent_dir)?;
+                            }
+                            tar_entry.unpack(&install_extract_path)?;
+                            log::debug!(
+                                "Extracted INSTALL from {} to {}",
+                                path.display(),
+                                install_extract_path.display()
+                            );
+
+                            let install_content = fs::read_to_string(&install_extract_path)?;
+                            let install_data: Install = toml::from_str(&install_content)
+                                .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
+
+                            let pkg_for_index = Package {
+                                name: install_data.package.name,
+                                version: install_data.package.version,
+                                arch: install_data.package.arch,
+                                descr: Some(
+                                    install_data.package.descr.unwrap_or_default(),
+                                ),
+                                license: Some(
+                                    install_data
+                                        .package
+                                        .license
+                                        .unwrap_or_default(),
+                                ),
+                                url: install_data.package.url,
+                            };
+
+                            all_packages.push(pkg_for_index);
+                            break;
+                        } else {
+                            log::warn!(
+                                "INSTALL file in archive {} has unexpected path structure, skipping.",
+                                path.display()
+                            );
+                        }
+                    }
+                }
+                fs::remove_dir_all(&temp_extract_dir)?;
+            }
+        }
+
+        let index = Index {
+            packages: all_packages,
+        };
+
+        let index_toml_content = toml::to_string_pretty(&index)
+            .map_err(|e| std::io::Error::other(format!("Failed to serialize INDEX.toml: {}", e)))?;
+
+        let index_path = repo_dir.join("INDEX.toml");
+        fs::write(&index_path, index_toml_content)
+            .map_err(|e| std::io::Error::other(format!("Failed to write INDEX.toml: {}", e)))?;
+
+        log::info!("Successfully generated INDEX.toml at {:?}", index_path);
+        Ok(true)
+    }
+}