backbone-bucket 0.8.0

Bucket Bounded Context: File Storage Module for Backbone Framework
Documentation 
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//! Application service for Thumbnail entities
//!
//! Generated by metaphor-schema. Do not edit manually.
//!
//! Type alias over `GenericCrudService` — all CRUD logic lives in backbone-core.
//! For custom behaviour, create `thumbnail_service_custom.rs` (preserved on regen).

use backbone_core::GenericCrudService;

use crate::presentation::dto::{CreateThumbnailDto, UpdateThumbnailDto};
use crate::domain::entity::Thumbnail;
use crate::infrastructure::persistence::ThumbnailRepository;

/// Application service for Thumbnail entities.
///
/// All 12 standard CRUD operations (list, create, get, update, patch,
/// soft_delete, restore, empty_trash, bulk_create, upsert, find_by_id,
/// list_deleted) are provided by `GenericCrudService`.
///
/// Custom extensions go in `thumbnail_service_custom.rs`:
///
/// ```rust,ignore
/// pub struct ThumbnailServiceCustom {
///     inner: Arc<ThumbnailService>,
///     // add domain-specific dependencies here
/// }
/// ```
pub type ThumbnailService = GenericCrudService<
    Thumbnail,
    CreateThumbnailDto,
    UpdateThumbnailDto,
    ThumbnailRepository,
>;

/// The rules the schema declares for Thumbnail, checked against the row a create or update
/// would store. The generated build attaches it to [`ThumbnailService`]. A refusing rule's
/// break answers 422; a rule in shadow is logged under `backbone::write_guard` and the
/// write goes ahead.
pub struct ThumbnailRowRules;

#[async_trait::async_trait]
impl backbone_core::write_guard::WriteGuard<Thumbnail> for ThumbnailRowRules {
    async fn check(
        &self,
        ctx: &backbone_core::write_guard::WriteCtx<'_, Thumbnail>,
    ) -> backbone_core::write_guard::GuardOutcome {
        use backbone_core::row_rule as r;
        use backbone_core::violation::Violation;
        use backbone_core::write_guard::{GuardOutcome, WriteKind};
        let (create, update) = (ctx.kind == WriteKind::Create, ctx.kind == WriteKind::Update);
        let Some(after) = ctx.after.filter(|_| create || update) else {
            return GuardOutcome::allow();
        };
        let Ok(row) = serde_json::to_value(after) else {
            return GuardOutcome::allow();
        };
        let row = &row;
        let old = ctx.before.and_then(|b| serde_json::to_value(b).ok());
        let shadow = Vec::new();
        let mut refuse = Vec::new();
        // `file_id_required` (@required on Thumbnail.file_id)
        if (create || (update && r::changed(old.as_ref(), row, &["file_id"]))) && !r::holds(&r::and(r::is_not_null(r::field(row, "file_id")), r::not(r::is_empty(r::trim(r::field(row, "file_id")))))) {
            refuse.push(Violation::new("file_id", "required", "file_id is required"));
        }
        // `storage_key_required` (@required on Thumbnail.storage_key)
        if (create || (update && r::changed(old.as_ref(), row, &["storage_key"]))) && !r::holds(&r::and(r::is_not_null(r::field(row, "storage_key")), r::not(r::is_empty(r::trim(r::field(row, "storage_key")))))) {
            refuse.push(Violation::new("storage_key", "required", "storage_key is required"));
        }
        GuardOutcome { refuse, shadow }
    }
}