adminx_actix/

lib.rs

// adminx-actix/src/lib.rs
//
// Actix Web adapter. Translates the neutral `ApiResponse` into an
// `actix_web::HttpResponse`, extracts the auth cookie into a `ReqCtx`, and wires
// each registered resource's JSON API and HTML UI (plus login/logout) onto an
// Actix `Scope`. All behavior lives in `adminx_core`; this is translation only.

use std::collections::HashMap;
use std::sync::Arc;

use adminx_core::attach::UploadedFile;
use adminx_core::auth;
use adminx_core::csrf;
use adminx_core::registry::all_resources;
use adminx_core::request::ReqCtx;
use adminx_core::resource::Resource;
use adminx_core::response::{ApiBody, ApiResponse};
use adminx_core::storage::storage;
use adminx_core::ui;

use actix_multipart::Multipart;
use actix_web::http::header::{HeaderName, HeaderValue};
use actix_web::http::StatusCode;
use actix_web::{web, HttpRequest, HttpResponse, Scope};
use futures_util::StreamExt;
use serde::Deserialize;
use serde_json::{json, Value};

/// Prefix the adminx scope is mounted at. Used for building UI links.
const MOUNT: &str = "/adminx";

#[derive(Deserialize)]
struct LoginForm {
    email: String,
    password: String,
    /// Hidden CSRF field; absent on a forged post, hence `Option`.
    #[serde(rename = "_csrf")]
    csrf: Option<String>,
}

#[derive(Deserialize)]
struct CodeForm {
    code: String,
    #[serde(rename = "_csrf")]
    csrf: Option<String>,
}

/// Convert a neutral response into an Actix response.
fn into_response(api: ApiResponse) -> HttpResponse {
    let status = StatusCode::from_u16(api.status).unwrap_or(StatusCode::INTERNAL_SERVER_ERROR);
    let mut builder = HttpResponse::build(status);
    for (k, v) in &api.headers {
        if let (Ok(name), Ok(val)) = (
            HeaderName::from_bytes(k.as_bytes()),
            HeaderValue::from_str(v),
        ) {
            builder.append_header((name, val));
        }
    }
    match api.body {
        ApiBody::Json(v) => builder.json(v),
        ApiBody::Bytes { content_type, data } => builder.content_type(content_type).body(data),
        ApiBody::Empty => builder.finish(),
    }
}

/// Build a request context, verifying the auth cookie into `claims` and
/// carrying the CSRF cookie through for form posts to check.
fn make_ctx(req: &HttpRequest, mount: &str) -> ReqCtx {
    let token = req.cookie(auth::COOKIE_NAME).map(|c| c.value().to_string());
    let csrf_cookie = req.cookie(csrf::COOKIE_NAME).map(|c| c.value().to_string());
    auth::build_ctx(
        mount,
        req.query_string(),
        token.as_deref(),
        csrf_cookie.as_deref(),
    )
}

/// Build the JSON API + HTML UI routes for a single resource.
fn resource_routes(resource: Box<dyn Resource>, mount: &'static str) -> Scope {
    let r: Arc<dyn Resource> = Arc::from(resource);
    let mut scope = web::scope("");

    // ---------- JSON API ----------
    scope = scope.route("/api", {
        let r = r.clone();
        web::get().to(move |req: HttpRequest| {
            let r = r.clone();
            async move { into_response(r.list(&make_ctx(&req, mount)).await) }
        })
    });
    scope = scope.route("/api", {
        let r = r.clone();
        web::post().to(move |req: HttpRequest, body: web::Json<Value>| {
            let r = r.clone();
            async move { into_response(r.create(&make_ctx(&req, mount), body.into_inner()).await) }
        })
    });
    scope = scope.route("/api/{id}", {
        let r = r.clone();
        web::get().to(move |req: HttpRequest, path: web::Path<String>| {
            let r = r.clone();
            async move { into_response(r.get(&make_ctx(&req, mount), &path.into_inner()).await) }
        })
    });
    scope = scope.route("/api/{id}", {
        let r = r.clone();
        web::put().to(
            move |req: HttpRequest, path: web::Path<String>, body: web::Json<Value>| {
                let r = r.clone();
                async move {
                    into_response(
                        r.update(&make_ctx(&req, mount), &path.into_inner(), body.into_inner())
                            .await,
                    )
                }
            },
        )
    });
    scope = scope.route("/api/{id}", {
        let r = r.clone();
        web::delete().to(move |req: HttpRequest, path: web::Path<String>| {
            let r = r.clone();
            async move { into_response(r.delete(&make_ctx(&req, mount), &path.into_inner()).await) }
        })
    });

    // ---------- HTML UI ----------
    scope = scope.route("/list", {
        let r = r.clone();
        web::get().to(move |req: HttpRequest| {
            let r = r.clone();
            async move { into_response(r.list_page(&make_ctx(&req, mount)).await) }
        })
    });
    scope = scope.route("/new", {
        let r = r.clone();
        web::get().to(move |req: HttpRequest| {
            let r = r.clone();
            async move { into_response(r.new_page(&make_ctx(&req, mount)).await) }
        })
    });
    scope = scope.route("/view/{id}", {
        let r = r.clone();
        web::get().to(move |req: HttpRequest, path: web::Path<String>| {
            let r = r.clone();
            async move { into_response(r.view_page(&make_ctx(&req, mount), &path.into_inner()).await) }
        })
    });
    scope = scope.route("/history/{id}", {
        let r = r.clone();
        web::get().to(move |req: HttpRequest, path: web::Path<String>| {
            let r = r.clone();
            async move { into_response(r.history_page(&make_ctx(&req, mount), &path.into_inner()).await) }
        })
    });
    scope = scope.route("/edit/{id}", {
        let r = r.clone();
        web::get().to(move |req: HttpRequest, path: web::Path<String>| {
            let r = r.clone();
            async move { into_response(r.edit_page(&make_ctx(&req, mount), &path.into_inner()).await) }
        })
    });
    scope = scope.route("/create", {
        let r = r.clone();
        web::post().to(
            move |req: HttpRequest, form: web::Form<HashMap<String, String>>| {
                let r = r.clone();
                async move {
                    into_response(r.create_form(&make_ctx(&req, mount), form.into_inner()).await)
                }
            },
        )
    });
    scope = scope.route("/update/{id}", {
        let r = r.clone();
        web::post().to(
            move |req: HttpRequest,
                  path: web::Path<String>,
                  form: web::Form<HashMap<String, String>>| {
                let r = r.clone();
                async move {
                    into_response(
                        r.update_form(&make_ctx(&req, mount), &path.into_inner(), form.into_inner())
                            .await,
                    )
                }
            },
        )
    });
    scope = scope.route("/{id}/delete", {
        let r = r.clone();
        web::post().to(
            move |req: HttpRequest,
                  path: web::Path<String>,
                  form: web::Form<HashMap<String, String>>| {
                let r = r.clone();
                let mut form = form.into_inner();
                let csrf = form.remove(csrf::FIELD_NAME);
                async move {
                    into_response(r.delete_form(&make_ctx(&req, mount), &path.into_inner(), csrf).await)
                }
            },
        )
    });

    // ---------- File attachments ----------
    // Upload rides a dedicated multipart endpoint; `_csrf` travels as a text
    // part of the same body alongside the file. Mirrors the Axum adapter.
    scope = scope.route("/{id}/attach/{field}", {
        let r = r.clone();
        web::post().to(
            move |req: HttpRequest, path: web::Path<(String, String)>, mut payload: Multipart| {
                let r = r.clone();
                async move {
                    let (id, field) = path.into_inner();
                    let mut csrf = None;
                    let mut file = None;
                    while let Some(Ok(mut item)) = payload.next().await {
                        let name = item
                            .content_disposition()
                            .and_then(|cd| cd.get_name().map(|s| s.to_string()));
                        let filename = item
                            .content_disposition()
                            .and_then(|cd| cd.get_filename().map(|s| s.to_string()));
                        let content_type = item.content_type().map(|m| m.to_string());
                        // Drain this field's chunks into one buffer.
                        let mut bytes = Vec::new();
                        while let Some(Ok(chunk)) = item.next().await {
                            bytes.extend_from_slice(&chunk);
                        }
                        match name.as_deref() {
                            Some(n) if n == csrf::FIELD_NAME => {
                                csrf = String::from_utf8(bytes).ok();
                            }
                            Some("file") => {
                                file = Some(UploadedFile {
                                    filename: filename.unwrap_or_else(|| "upload".into()),
                                    content_type: content_type
                                        .unwrap_or_else(|| "application/octet-stream".into()),
                                    bytes,
                                });
                            }
                            _ => {}
                        }
                    }
                    let ctx = make_ctx(&req, mount);
                    match file {
                        Some(file) => {
                            into_response(r.attach_file(&ctx, &id, &field, csrf, file).await)
                        }
                        None => into_response(
                            adminx_core::CoreError::BadRequest("no file in upload".into()).into(),
                        ),
                    }
                }
            },
        )
    });
    scope = scope.route("/{id}/blob/{field}", {
        let r = r.clone();
        web::get().to(move |req: HttpRequest, path: web::Path<(String, String)>| {
            let r = r.clone();
            async move {
                let (id, field) = path.into_inner();
                into_response(r.serve_file(&make_ctx(&req, mount), &id, &field).await)
            }
        })
    });
    scope = scope.route("/{id}/detach/{field}", {
        let r = r.clone();
        web::post().to(
            move |req: HttpRequest,
                  path: web::Path<(String, String)>,
                  form: web::Form<HashMap<String, String>>| {
                let r = r.clone();
                let mut form = form.into_inner();
                let csrf = form.remove(csrf::FIELD_NAME);
                async move {
                    let (id, field) = path.into_inner();
                    into_response(r.detach_file(&make_ctx(&req, mount), &id, &field, csrf).await)
                }
            },
        )
    });

    // ---------- Ordered relations ----------
    scope = scope.route("/{id}/related/{name}", {
        let r = r.clone();
        web::get().to(move |req: HttpRequest, path: web::Path<(String, String)>| {
            let r = r.clone();
            async move {
                let (id, name) = path.into_inner();
                into_response(r.related_page(&make_ctx(&req, mount), &id, &name).await)
            }
        })
    });
    scope = scope.route("/{id}/related/{name}", {
        let r = r.clone();
        web::post().to(
            move |req: HttpRequest,
                  path: web::Path<(String, String)>,
                  form: web::Form<HashMap<String, String>>| {
                let r = r.clone();
                let mut form = form.into_inner();
                let csrf = form.remove(csrf::FIELD_NAME);
                let op = form.remove("op");
                let member_id = form.remove("member_id");
                async move {
                    let (id, name) = path.into_inner();
                    into_response(
                        r.related_action(&make_ctx(&req, mount), &id, &name, op, member_id, csrf)
                            .await,
                    )
                }
            },
        )
    });

    // ---------- Custom actions ----------
    scope = scope.route("/{id}/action/{name}", {
        let r = r.clone();
        // The action button submits a url-encoded form; parse it as one, use the
        // remaining fields as the action's JSON body, and lift out `_csrf`.
        web::post().to(
            move |req: HttpRequest,
                  path: web::Path<(String, String)>,
                  form: web::Form<HashMap<String, String>>| {
                let r = r.clone();
                let mut form = form.into_inner();
                let csrf = form.remove(csrf::FIELD_NAME);
                let payload = ui::form_to_json(form);
                async move {
                    let (id, name) = path.into_inner();
                    into_response(r.run_action(&make_ctx(&req, mount), &name, id, payload, csrf).await)
                }
            },
        )
    });

    scope
}

async fn dashboard(req: HttpRequest, mount: &'static str) -> HttpResponse {
    let ctx = make_ctx(&req, mount);
    if let Some(deny) = auth::guard_ui(&ctx) {
        return into_response(deny);
    }
    into_response(ui::dashboard(&ctx).await)
}

async fn login_form(req: HttpRequest, mount: &'static str) -> HttpResponse {
    into_response(auth::login_page(&make_ctx(&req, mount), None))
}

async fn login_submit(req: HttpRequest, mount: &'static str, form: web::Form<LoginForm>) -> HttpResponse {
    let ctx = make_ctx(&req, mount);
    into_response(auth::handle_login(&ctx, &form.email, &form.password, form.csrf.as_deref()).await)
}

async fn logout(req: HttpRequest, mount: &'static str) -> HttpResponse {
    into_response(auth::handle_logout(&make_ctx(&req, mount)))
}

async fn mfa_setup_get(req: HttpRequest, mount: &'static str) -> HttpResponse {
    into_response(auth::mfa_setup_page(&make_ctx(&req, mount), None).await)
}

async fn mfa_enable_post(req: HttpRequest, mount: &'static str, form: web::Form<CodeForm>) -> HttpResponse {
    let ctx = make_ctx(&req, mount);
    into_response(auth::handle_mfa_enable(&ctx, &form.code, form.csrf.as_deref()).await)
}

async fn mfa_verify_get(req: HttpRequest, mount: &'static str) -> HttpResponse {
    into_response(auth::mfa_verify_page(&make_ctx(&req, mount), None).await)
}

async fn mfa_verify_post(req: HttpRequest, mount: &'static str, form: web::Form<CodeForm>) -> HttpResponse {
    let ctx = make_ctx(&req, mount);
    into_response(auth::handle_mfa_verify(&ctx, &form.code, form.csrf.as_deref()).await)
}

async fn health() -> HttpResponse {
    let ok = storage().health().await;
    let body = json!({ "status": if ok { "healthy" } else { "unhealthy" } });
    into_response(ApiResponse::json(if ok { 200 } else { 503 }, body))
}

/// Build the full adminx Actix scope, mounted at `/adminx`:
/// `App::new().service(adminx_actix::scope())`.
pub fn scope() -> Scope {
    scope_at(MOUNT)
}

/// Build the adminx Actix scope at a custom mount prefix. The prefix is both the
/// scope path and what in-page links, redirects, and form actions are built
/// from, so one argument keeps them in sync:
///
/// ```ignore
/// App::new().service(adminx_actix::scope_at("/admin"));
/// ```
///
/// The prefix must be a `&'static str` (it is captured by the route handlers).
pub fn scope_at(mount: &'static str) -> Scope {
    let mut scope = web::scope(mount)
        .route("", web::get().to(move |req: HttpRequest| dashboard(req, mount)))
        .route("/", web::get().to(move |req: HttpRequest| dashboard(req, mount)))
        .route("/health", web::get().to(health))
        .route("/login", web::get().to(move |req: HttpRequest| login_form(req, mount)))
        .route(
            "/login",
            web::post().to(move |req: HttpRequest, f: web::Form<LoginForm>| login_submit(req, mount, f)),
        )
        .route("/logout", web::get().to(move |req: HttpRequest| logout(req, mount)))
        .route("/mfa/setup", web::get().to(move |req: HttpRequest| mfa_setup_get(req, mount)))
        .route(
            "/mfa/enable",
            web::post().to(move |req: HttpRequest, f: web::Form<CodeForm>| mfa_enable_post(req, mount, f)),
        )
        .route("/mfa/verify", web::get().to(move |req: HttpRequest| mfa_verify_get(req, mount)))
        .route(
            "/mfa/verify",
            web::post().to(move |req: HttpRequest, f: web::Form<CodeForm>| mfa_verify_post(req, mount, f)),
        );

    let resources = all_resources();
    tracing::info!("adminx-actix: mounting {} resource(s) at '{}'", resources.len(), mount);

    for resource in resources {
        let base = format!("/{}", resource.base_path());
        tracing::info!(
            "adminx-actix: mounting '{}' at '{}{}'",
            resource.resource_name(),
            mount,
            base
        );
        scope = scope.service(web::scope(&base).service(resource_routes(resource, mount)));
    }

    scope
}