Display the total downloads/completed downloads of a torrent

[josecelano]

Proposed on: #519 by @ty5e3a45.

Currently, we only show the number of seeders and leechers for a torrent.

The Index API endpoint does not contain that info:

{
    "data": {
        "torrent_id": 987,
        "uploader": "admin",
        "info_hash": "a158dcb05854578f37f4fc79ef2206547143a0f5",
        "title": "title-e2fc03f9-f7be-4b4c-aa9d-65da0cedbed4",
        "description": "description-e2fc03f9-f7be-4b4c-aa9d-65da0cedbed4",
        "category": {
            "id": 6,
            "category_id": 6,
            "name": "test",
            "num_torrents": 1000
        },
        "upload_date": "2024-03-13 09:49:25",
        "file_size": 37,
        "seeders": 0,
        "leechers": 0,
        "files": [
            {
                "path": [
                    "file-e2fc03f9-f7be-4b4c-aa9d-65da0cedbed4.txt"
                ],
                "length": 37,
                "md5sum": null
            }
        ],
        "trackers": [
            "udp://localhost:6969"
        ],
        "magnet_link": "magnet:?xt=urn:btih:a158dcb05854578f37f4fc79ef2206547143a0f5&dn=title-e2fc03f9-f7be-4b4c-aa9d-65da0cedbed4&tr=udp%3A%2F%2Flocalhost%3A6969",
        "tags": [],
        "name": "file-e2fc03f9-f7be-4b4c-aa9d-65da0cedbed4.txt",
        "comment": null,
        "creation_date": null,
        "created_by": null,
        "encoding": null,
        "canonical_info_hash_group": [
            "a158dcb05854578f37f4fc79ef2206547143a0f5"
        ]
    }
}

It only contains the number of seeders and leechers. It does not contain the number of complete downloads because the Index does not have that number now. The Index imports that info from the tracker and stores the stats in this table:

CREATE TABLE "torrust_torrent_tracker_stats" (
	"torrent_id"	INTEGER NOT NULL,
	"tracker_url"	VARCHAR(256) NOT NULL,
	"seeders"	INTEGER NOT NULL DEFAULT 0,
	"leechers"	INTEGER NOT NULL DEFAULT 0,
	"updated_at"	TEXT DEFAULT 1000-01-01 00:00:00,
	FOREIGN KEY("torrent_id") REFERENCES "torrust_torrents"("torrent_id") ON DELETE CASCADE,
	UNIQUE("torrent_id","tracker_url"),
	PRIMARY KEY("torrent_id")
);

There is a background task to import statistics from the tracker that uses this tracker endpoint:

http://localhost:1212/api/v1/torrents?infohash=9c38422213e30bff212b30c360d26f9a02136422&token=MyAccessToken

[
  {
    "info_hash": "9c38422213e30bff212b30c360d26f9a02136422",
    "seeders": 1,
    "completed": 0,
    "leechers": 0
  }
]

In order to implement this feature we need to:

• Add a new field to the torrust_torrent_tracker_stats table: completed.
• Include that field in the Index endpoints:
  • Torrent Details: http://localhost:3001/v1/torrent/9c38422213e30bff212b30c360d26f9a02136422
  • Torrent List: http://localhost:3001/v1/torrents?page_size=50&page=0&sort=UploadedDesc&categories=&tags=
• Show the value in the GUI (this repo).

Screenshot

I'll open the issues because it's a good first issue for new contributors.

Subtasks

• Persist the total completed downloads of a torrent torrust-index#559