kaniop-webhook 0.12.1

Admission webhook for Kaniop
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use crate::admission::{AdmissionResponse, AdmissionReview};
use crate::state::WebhookState;
use crate::validator::{HasKanidmRef, KanidmEntityKind, check_duplicate, check_external_duplicate};

use axum::extract::State;
use axum::response::Json;
use kube::{Resource, ResourceExt};
use tracing::{debug, error};

/// Generic validation handler
pub async fn validate_resource<T>(
    state: &WebhookState,
    store: &kube::runtime::reflector::Store<T>,
    review: AdmissionReview<T>,
    resource_name: &str,
    entity_kind: KanidmEntityKind,
) -> Json<AdmissionReview<()>>
where
    T: Resource + ResourceExt + Clone + HasKanidmRef,
    <T as Resource>::DynamicType: Eq + std::hash::Hash + Clone,
{
    let request = match review.request.as_ref() {
        Some(req) => req,
        None => {
            error!("Missing request in admission review");
            return Json(review.response(AdmissionResponse::deny(
                "unknown".to_string(),
                "Invalid admission review: missing request",
            )));
        }
    };

    let uid = request.uid.clone();
    let operation = &request.operation;

    // Only validate CREATE operations (kanidmRef and kanidmName are immutable)
    if operation != "CREATE" {
        debug!(
            "Skipping validation for {} operation on {}",
            operation, resource_name
        );
        return Json(review.response(AdmissionResponse::allow(uid)));
    }

    let object = match request.object.as_ref() {
        Some(obj) => obj,
        None => {
            error!("Missing object in CREATE request");
            return Json(review.response(AdmissionResponse::deny(
                uid,
                "Invalid admission review: missing object",
            )));
        }
    };

    if let Err(err) = check_duplicate(object, resource_name, store) {
        debug!(
            "Validation failed for {} {}/{}: {}",
            resource_name,
            object.namespace().unwrap_or_else(|| "default".to_string()),
            object.name_any(),
            err
        );
        return Json(review.response(AdmissionResponse::deny(uid, err)));
    }

    if let Err(err) = check_external_duplicate(state, object, resource_name, entity_kind).await {
        debug!(
            "External entity validation failed for {} {}/{}: {}",
            resource_name,
            object.namespace().unwrap_or_else(|| "default".to_string()),
            object.name_any(),
            err
        );
        return Json(review.response(AdmissionResponse::deny(uid, err)));
    }

    debug!(
        "Validation passed for {} {}/{}",
        resource_name,
        object.namespace().unwrap_or_else(|| "default".to_string()),
        object.name_any()
    );
    Json(review.response(AdmissionResponse::allow(uid)))
}

// Concrete handlers for each resource type
pub async fn validate_kanidm_group(
    State(state): State<WebhookState>,
    Json(review): Json<AdmissionReview<kaniop_group::crd::KanidmGroup>>,
) -> Json<AdmissionReview<()>> {
    validate_resource(
        &state,
        &state.group_store,
        review,
        "KanidmGroup",
        KanidmEntityKind::Group,
    )
    .await
}

pub async fn validate_kanidm_person(
    State(state): State<WebhookState>,
    Json(review): Json<AdmissionReview<kaniop_person::crd::KanidmPersonAccount>>,
) -> Json<AdmissionReview<()>> {
    validate_resource(
        &state,
        &state.person_store,
        review,
        "KanidmPersonAccount",
        KanidmEntityKind::Person,
    )
    .await
}

pub async fn validate_kanidm_oauth2(
    State(state): State<WebhookState>,
    Json(review): Json<AdmissionReview<kaniop_oauth2::crd::KanidmOAuth2Client>>,
) -> Json<AdmissionReview<()>> {
    validate_resource(
        &state,
        &state.oauth2_store,
        review,
        "KanidmOAuth2Client",
        KanidmEntityKind::OAuth2Client,
    )
    .await
}

pub async fn validate_kanidm_service_account(
    State(state): State<WebhookState>,
    Json(review): Json<AdmissionReview<kaniop_service_account::crd::KanidmServiceAccount>>,
) -> Json<AdmissionReview<()>> {
    validate_resource(
        &state,
        &state.service_account_store,
        review,
        "KanidmServiceAccount",
        KanidmEntityKind::ServiceAccount,
    )
    .await
}