backbone-bucket 0.2.1

//! Update ContentHash use case
//!
//! Generated by backbone-schema. Do not edit manually.

use std::sync::Arc;

use anyhow::{Result, anyhow};
use async_trait::async_trait;
use uuid::Uuid;

use super::UseCase;
use crate::domain::entity::ContentHash;
use crate::infrastructure::persistence::ContentHashRepository;

/// Input for updating a ContentHash
#[derive(Debug, Clone)]
pub struct UpdateContentHashInput {
    pub id: Uuid,
    pub hash: Option<String>,
    pub size_bytes: Option<i64>,
    pub storage_key: Option<String>,
    pub storage_backend: Option<StorageBackend>,
    pub reference_count: Option<i32>,
    pub first_uploaded_at: Option<DateTime<Utc>>,
    pub last_referenced_at: Option<DateTime<Utc>>,
    pub fingerprint: Option<String>,
    pub metadata: Option<serde_json::Value>,
}

/// Output after updating a ContentHash
#[derive(Debug, Clone)]
pub struct UpdateContentHashOutput {
    pub content_hash: ContentHash,
}

/// Use case for updating an existing ContentHash
pub struct UpdateContentHashUseCase {
    repository: Arc<ContentHashRepository>,
}

impl UpdateContentHashUseCase {
    pub fn new(repository: Arc<ContentHashRepository>) -> Self {
        Self { repository }
    }
}

#[async_trait]
impl UseCase for UpdateContentHashUseCase {
    type Input = UpdateContentHashInput;
    type Output = UpdateContentHashOutput;

    async fn execute(&self, input: Self::Input) -> Result<Self::Output> {
        // Fetch existing entity
        let mut entity = self.repository.find_by_id(input.id).await?
            .ok_or_else(|| anyhow!("ContentHash not found"))?;

        // Apply updates
        if let Some(val) = input.hash {
            entity.hash = val;
        }
        if let Some(val) = input.size_bytes {
            entity.size_bytes = val;
        }
        if let Some(val) = input.storage_key {
            entity.storage_key = val;
        }
        if let Some(val) = input.storage_backend {
            entity.storage_backend = val;
        }
        if let Some(val) = input.reference_count {
            entity.reference_count = val;
        }
        if let Some(val) = input.first_uploaded_at {
            entity.first_uploaded_at = val;
        }
        if let Some(val) = input.last_referenced_at {
            entity.last_referenced_at = val;
        }
        if input.fingerprint.is_some() {
            entity.fingerprint = input.fingerprint;
        }
        if input.metadata.is_some() {
            entity.metadata = input.metadata;
        }

        // <<< CUSTOM VALIDATION START >>>
        // Add custom validation logic here
        // <<< CUSTOM VALIDATION END >>>

        // Persist updates
        let updated = self.repository.update(entity).await?;

        Ok(UpdateContentHashOutput { content_hash: updated })
    }
}