refactor: [#56] extract mods in upgrader

src/upgrades/from_v1_0_0_to_v2_0_0/databases/mod.rs

@@ -1,2 +1,29 @@
+use self::sqlite_v1_0_0::SqliteDatabaseV1_0_0;
+use self::sqlite_v2_0_0::SqliteDatabaseV2_0_0;
+use std::sync::Arc;
+
 pub mod sqlite_v1_0_0;
 pub mod sqlite_v2_0_0;
+
+pub async fn current_db(db_filename: &str) -> Arc<SqliteDatabaseV1_0_0> {
+    let source_database_connect_url = format!("sqlite://{}?mode=ro", db_filename);
+    Arc::new(SqliteDatabaseV1_0_0::new(&source_database_connect_url).await)
+}
+
+pub async fn new_db(db_filename: &str) -> Arc<SqliteDatabaseV2_0_0> {
+    let dest_database_connect_url = format!("sqlite://{}?mode=rwc", db_filename);
+    Arc::new(SqliteDatabaseV2_0_0::new(&dest_database_connect_url).await)
+}
+
+pub async fn migrate_destiny_database(dest_database: Arc<SqliteDatabaseV2_0_0>) {
+    println!("Running migrations in destiny database...");
+    dest_database.migrate().await;
+}
+
+pub async fn reset_destiny_database(dest_database: Arc<SqliteDatabaseV2_0_0>) {
+    println!("Truncating all tables in destiny database ...");
+    dest_database
+        .delete_all_database_rows()
+        .await
+        .expect("Can't reset destiny database.");
+}

src/upgrades/from_v1_0_0_to_v2_0_0/mod.rs

@@ -1,2 +1,3 @@
+pub mod databases;
+pub mod transferrers;
 pub mod upgrader;
-pub mod databases;

src/upgrades/from_v1_0_0_to_v2_0_0/transferrers/category_transferrer.rs

@@ -0,0 +1,39 @@
+use crate::upgrades::from_v1_0_0_to_v2_0_0::databases::sqlite_v1_0_0::SqliteDatabaseV1_0_0;
+use crate::upgrades::from_v1_0_0_to_v2_0_0::databases::sqlite_v2_0_0::SqliteDatabaseV2_0_0;
+use std::sync::Arc;
+
+pub async fn transfer_categories(
+    source_database: Arc<SqliteDatabaseV1_0_0>,
+    dest_database: Arc<SqliteDatabaseV2_0_0>,
+) {
+    println!("Transferring categories ...");
+
+    let source_categories = source_database.get_categories_order_by_id().await.unwrap();
+    println!("[v1] categories: {:?}", &source_categories);
+
+    let result = dest_database.reset_categories_sequence().await.unwrap();
+    println!("[v2] reset categories sequence result {:?}", result);
+
+    for cat in &source_categories {
+        println!(
+            "[v2] adding category {:?} with id {:?} ...",
+            &cat.name, &cat.category_id
+        );
+        let id = dest_database
+            .insert_category_and_get_id(&cat.name)
+            .await
+            .unwrap();
+
+        if id != cat.category_id {
+            panic!(
+                "Error copying category {:?} from source DB to destiny DB",
+                &cat.category_id
+            );
+        }
+
+        println!("[v2] category: {:?} {:?} added.", id, &cat.name);
+    }
+
+    let dest_categories = dest_database.get_categories().await.unwrap();
+    println!("[v2] categories: {:?}", &dest_categories);
+}

src/upgrades/from_v1_0_0_to_v2_0_0/transferrers/mod.rs

@@ -0,0 +1,4 @@
+pub mod category_transferrer;
+pub mod torrent_transferrer;
+pub mod tracker_key_transferrer;
+pub mod user_transferrer;

src/upgrades/from_v1_0_0_to_v2_0_0/transferrers/torrent_transferrer.rs

@@ -0,0 +1,198 @@
+use crate::models::torrent_file::Torrent;
+use crate::upgrades::from_v1_0_0_to_v2_0_0::databases::sqlite_v1_0_0::SqliteDatabaseV1_0_0;
+use crate::upgrades::from_v1_0_0_to_v2_0_0::databases::sqlite_v2_0_0::SqliteDatabaseV2_0_0;
+use crate::upgrades::from_v1_0_0_to_v2_0_0::databases::sqlite_v2_0_0::TorrentRecordV2;
+use crate::utils::parse_torrent::decode_torrent;
+use std::sync::Arc;
+use std::{error, fs};
+
+pub async fn transfer_torrents(
+    source_database: Arc<SqliteDatabaseV1_0_0>,
+    dest_database: Arc<SqliteDatabaseV2_0_0>,
+    upload_path: &str,
+) {
+    println!("Transferring torrents ...");
+
+    // Transfer table `torrust_torrents_files`
+
+    // Although the The table `torrust_torrents_files` existed in version v1.0.0
+    // it was was not used.
+
+    // Transfer table `torrust_torrents`
+
+    let torrents = source_database.get_torrents().await.unwrap();
+
+    for torrent in &torrents {
+        // [v2] table torrust_torrents
+
+        println!(
+            "[v2][torrust_torrents] adding the torrent: {:?} ...",
+            &torrent.torrent_id
+        );
+
+        let uploader = source_database
+            .get_user_by_username(&torrent.uploader)
+            .await
+            .unwrap();
+
+        if uploader.username != torrent.uploader {
+            panic!(
+                "Error copying torrent with id {:?}.
+                Username (`uploader`) in `torrust_torrents` table does not match `username` in `torrust_users` table",
+                &torrent.torrent_id
+            );
+        }
+
+        let filepath = format!("{}/{}.torrent", upload_path, &torrent.torrent_id);
+
+        let torrent_from_file_result = read_torrent_from_file(&filepath);
+
+        if torrent_from_file_result.is_err() {
+            panic!("Error torrent file not found: {:?}", &filepath);
+        }
+
+        let torrent_from_file = torrent_from_file_result.unwrap();
+
+        let id = dest_database
+            .insert_torrent(&TorrentRecordV2::from_v1_data(
+                torrent,
+                &torrent_from_file.info,
+                &uploader,
+            ))
+            .await
+            .unwrap();
+
+        if id != torrent.torrent_id {
+            panic!(
+                "Error copying torrent {:?} from source DB to destiny DB",
+                &torrent.torrent_id
+            );
+        }
+
+        println!(
+            "[v2][torrust_torrents] torrent with id {:?} added.",
+            &torrent.torrent_id
+        );
+
+        // [v2] table torrust_torrent_files
+
+        println!("[v2][torrust_torrent_files] adding torrent files");
+
+        if torrent_from_file.is_a_single_file_torrent() {
+            // The torrent contains only one file then:
+            // - "path" is NULL
+            // - "md5sum" can be NULL
+
+            println!(
+                "[v2][torrust_torrent_files][single-file-torrent] adding torrent file {:?} with length {:?} ...",
+                &torrent_from_file.info.name, &torrent_from_file.info.length,
+            );
+
+            let file_id = dest_database
+                .insert_torrent_file_for_torrent_with_one_file(
+                    torrent.torrent_id,
+                    // TODO: it seems med5sum can be None. Why? When?
+                    &torrent_from_file.info.md5sum.clone(),
+                    torrent_from_file.info.length.unwrap(),
+                )
+                .await;
+
+            println!(
+                "[v2][torrust_torrent_files][single-file-torrent] torrent file insert result: {:?}",
+                &file_id
+            );
+        } else {
+            // Multiple files are being shared
+            let files = torrent_from_file.info.files.as_ref().unwrap();
+
+            for file in files.iter() {
+                println!(
+                    "[v2][torrust_torrent_files][multiple-file-torrent] adding torrent file: {:?} ...",
+                    &file
+                );
+
+                let file_id = dest_database
+                    .insert_torrent_file_for_torrent_with_multiple_files(torrent, file)
+                    .await;
+
+                println!(
+                    "[v2][torrust_torrent_files][multiple-file-torrent] torrent file insert result: {:?}",
+                    &file_id
+                );
+            }
+        }
+
+        // [v2] table torrust_torrent_info
+
+        println!(
+            "[v2][torrust_torrent_info] adding the torrent info for torrent id {:?} ...",
+            &torrent.torrent_id
+        );
+
+        let id = dest_database.insert_torrent_info(torrent).await;
+
+        println!(
+            "[v2][torrust_torrents] torrent info insert result: {:?}.",
+            &id
+        );
+
+        // [v2] table torrust_torrent_announce_urls
+
+        println!(
+            "[v2][torrust_torrent_announce_urls] adding the torrent announce url for torrent id {:?} ...",
+            &torrent.torrent_id
+        );
+
+        if torrent_from_file.announce_list.is_some() {
+            // BEP-0012. Multiple trackers.
+
+            println!("[v2][torrust_torrent_announce_urls][announce-list] adding the torrent announce url for torrent id {:?} ...", &torrent.torrent_id);
+
+            // flatten the nested vec (this will however remove the)
+            let announce_urls = torrent_from_file
+                .announce_list
+                .clone()
+                .unwrap()
+                .into_iter()
+                .flatten()
+                .collect::<Vec<String>>();
+
+            for tracker_url in announce_urls.iter() {
+                println!("[v2][torrust_torrent_announce_urls][announce-list] adding the torrent announce url for torrent id {:?} ...", &torrent.torrent_id);
+
+                let announce_url_id = dest_database
+                    .insert_torrent_announce_url(torrent.torrent_id, tracker_url)
+                    .await;
+
+                println!("[v2][torrust_torrent_announce_urls][announce-list] torrent announce url insert result {:?} ...", &announce_url_id);
+            }
+        } else if torrent_from_file.announce.is_some() {
+            println!("[v2][torrust_torrent_announce_urls][announce] adding the torrent announce url for torrent id {:?} ...", &torrent.torrent_id);
+
+            let announce_url_id = dest_database
+                .insert_torrent_announce_url(
+                    torrent.torrent_id,
+                    &torrent_from_file.announce.unwrap(),
+                )
+                .await;
+
+            println!(
+                "[v2][torrust_torrent_announce_urls][announce] torrent announce url insert result {:?} ...",
+                &announce_url_id
+            );
+        }
+    }
+    println!("Torrents transferred");
+}
+
+pub fn read_torrent_from_file(path: &str) -> Result<Torrent, Box<dyn error::Error>> {
+    let contents = match fs::read(path) {
+        Ok(contents) => contents,
+        Err(e) => return Err(e.into()),
+    };
+
+    match decode_torrent(&contents) {
+        Ok(torrent) => Ok(torrent),
+        Err(e) => Err(e),
+    }
+}

src/upgrades/from_v1_0_0_to_v2_0_0/transferrers/tracker_key_transferrer.rs

@@ -0,0 +1,45 @@
+use crate::upgrades::from_v1_0_0_to_v2_0_0::databases::sqlite_v1_0_0::SqliteDatabaseV1_0_0;
+use crate::upgrades::from_v1_0_0_to_v2_0_0::databases::sqlite_v2_0_0::SqliteDatabaseV2_0_0;
+use std::sync::Arc;
+
+pub async fn transfer_tracker_keys(
+    source_database: Arc<SqliteDatabaseV1_0_0>,
+    dest_database: Arc<SqliteDatabaseV2_0_0>,
+) {
+    println!("Transferring tracker keys ...");
+
+    // Transfer table `torrust_tracker_keys`
+
+    let tracker_keys = source_database.get_tracker_keys().await.unwrap();
+
+    for tracker_key in &tracker_keys {
+        // [v2] table torrust_tracker_keys
+
+        println!(
+            "[v2][torrust_users] adding the tracker key with id {:?} ...",
+            &tracker_key.key_id
+        );
+
+        let id = dest_database
+            .insert_tracker_key(
+                tracker_key.key_id,
+                tracker_key.user_id,
+                &tracker_key.key,
+                tracker_key.valid_until,
+            )
+            .await
+            .unwrap();
+
+        if id != tracker_key.key_id {
+            panic!(
+                "Error copying tracker key {:?} from source DB to destiny DB",
+                &tracker_key.key_id
+            );
+        }
+
+        println!(
+            "[v2][torrust_tracker_keys] tracker key with id {:?} added.",
+            &tracker_key.key_id
+        );
+    }
+}