//! `/log` (oxygenhub#238): the transparency log's latest checkpoint and

//! its newest entries, with where to fetch the rest (C2SP tlog-tiles).

use super::{filters, Page, Shell};

use crate::auth::Viewer;

use crate::{db, Shared};

use askama::Template;

use axum::extract::State;

pub struct Row {

    pub idx: i64,

    pub kind: String,

    pub object: String,

    /// `owner/name`, when the entry is a repository's this hub still has.

    pub repo: Option<String>,

    pub received_ms: i64,

}

#[derive(Template)]

#[template(path = "log.html")]

pub struct LogPage {

    shell: Shell,

    origin: String,

    size: u64,

    note: Option<String>,

    base: String,

    rows: Vec<Row>,

}

pub async fn page(State(app): State<Shared>, viewer: Viewer) -> Page<LogPage> {

    let shell = Shell::new(&app, "/log", &viewer);

    let recent = db::tlog::recent(&app.db, None, 50).await.unwrap_or_default();

    let mut rows = Vec::with_capacity(recent.len());

    for r in recent {

        // Entries of private repositories show only their hashes, and so

        // do a secret drop's (#279), whose address is its secret.

        let repo = match r.repo_id {

            Some(id) => match db::repos::get_by_id(&app.db, id).await {

                Ok(Some(row))

                    if (!row.is_drop() || crate::drops::listed_to(viewer.account(), &row))

                        && crate::auth::roles::allows(

                            crate::auth::roles::role_for(&app.db, viewer.account(), &row).await.unwrap_or(None),

                            crate::auth::roles::Access::Read,

                        ) =>

                {

                    Some(row.slug())

                }

                _ => None,

            },

            None => None,

        };

        rows.push(Row { idx: r.idx, kind: r.kind, object: r.object, repo, received_ms: r.received_ms });

    }

    Page(LogPage {

        shell,

        origin: app.tlog.origin.clone(),

        size: app.tlog.size(),

        note: app.tlog.checkpoint(),

        base: app.config.base_url().trim_end_matches('/').to_string(),

        rows,

    })

}