backbone-bucket 0.3.0

//! FileShare Projector (Event Handler)
//!
//! Generated by backbone-schema. Do not edit manually.
//!
//! This projector listens to domain events and updates the projection.

use std::sync::Arc;

use anyhow::Result;
use async_trait::async_trait;
use chrono::Utc;

use super::FileShareProjection;
use crate::domain::entity::FileShare;
use crate::domain::events::{
    FileShareCreatedEvent, FileShareUpdatedEvent, FileShareDeletedEvent,
};

// ============================================================================
// EVENT HANDLER TRAIT
// ============================================================================

/// Trait for handling FileShare domain events
///
/// All handler methods receive the event sequence number for tracking
/// which events have been processed by the projector.
#[async_trait]
pub trait FileShareEventHandler: Send + Sync {
    /// Handle entity created event
    async fn on_created(&self, event: FileShareCreatedEvent, sequence: i64) -> Result<()>;
    /// Handle entity updated event
    async fn on_updated(&self, event: FileShareUpdatedEvent, sequence: i64) -> Result<()>;
    /// Handle entity deleted event
    async fn on_deleted(&self, event: FileShareDeletedEvent, sequence: i64) -> Result<()>;
}

// ============================================================================
// PROJECTION REPOSITORY
// ============================================================================

/// Repository for FileShare projections
#[async_trait]
pub trait FileShareProjectionRepository: Send + Sync {
    async fn save(&self, projection: &FileShareProjection) -> Result<()>;
    async fn find_by_id(&self, id: uuid::Uuid) -> Result<Option<FileShareProjection>>;
    async fn delete(&self, id: uuid::Uuid) -> Result<()>;
    async fn rebuild_all(&self) -> Result<u64>;
}

// ============================================================================
// PROJECTOR
// ============================================================================

/// Projector that updates FileShare projection from events
pub struct FileShareProjector<R: FileShareProjectionRepository> {
    repository: Arc<R>,
}

impl<R: FileShareProjectionRepository> FileShareProjector<R> {
    /// Create a new projector
    pub fn new(repository: Arc<R>) -> Self {
        Self { repository }
    }

    /// Rebuild all projections from event history
    pub async fn rebuild(&self) -> Result<u64> {
        self.repository.rebuild_all().await
    }

    /// Process a stored event from the event store
    ///
    /// This method dispatches the event to the appropriate handler based on event type.
    /// Returns Ok(true) if the event was processed, Ok(false) if it was skipped.
    pub async fn process_stored_event(&self, event: &crate::infrastructure::event_store::StoredEvent) -> Result<bool>
    where
        Self: FileShareEventHandler,
    {
        let sequence = event.sequence;

        match event.event_type.as_str() {
            "FileShareCreatedEvent" => {
                let created: FileShareCreatedEvent = serde_json::from_value(event.payload.clone())?;
                self.on_created(created, sequence).await?;
                Ok(true)
            }
            "FileShareUpdatedEvent" => {
                let updated: FileShareUpdatedEvent = serde_json::from_value(event.payload.clone())?;
                self.on_updated(updated, sequence).await?;
                Ok(true)
            }
            "FileShareDeletedEvent" => {
                let deleted: FileShareDeletedEvent = serde_json::from_value(event.payload.clone())?;
                self.on_deleted(deleted, sequence).await?;
                Ok(true)
            }
            _ => Ok(false), // Event type not handled by this projector
        }
    }
}

#[async_trait]
impl<R: FileShareProjectionRepository> FileShareEventHandler for FileShareProjector<R> {

    async fn on_created(&self, event: FileShareCreatedEvent, sequence: i64) -> Result<()> {
        let mut projection = FileShareProjection::new(
            event.id,
            event.file_id,
            event.owner_id,
            event.token,
            event.share_type,
            event.permission,
            event.shared_with,
            event.password_hash,
            event.max_downloads,
            event.download_count,
            event.expires_at,
            event.status,
            event.revoked_at,
            event.revoked_by,
            event.message,
            event.metadata
        );

        // Track the event sequence for this projection
        projection.apply_event(sequence);

        self.repository.save(&projection).await
    }

    async fn on_updated(&self, event: FileShareUpdatedEvent, sequence: i64) -> Result<()> {
        if let Some(mut projection) = self.repository.find_by_id(event.id).await? {
            // Apply updates from event
            projection.file_id = event.file_id;
            projection.owner_id = event.owner_id;
            projection.token = event.token;
            projection.share_type = event.share_type;
            projection.permission = event.permission;
            projection.shared_with = event.shared_with;
            projection.password_hash = event.password_hash;
            projection.max_downloads = event.max_downloads;
            projection.download_count = event.download_count;
            projection.expires_at = event.expires_at;
            projection.status = event.status;
            projection.revoked_at = event.revoked_at;
            projection.revoked_by = event.revoked_by;
            projection.message = event.message;
            projection.metadata = event.metadata;
            // Track the event sequence for this projection
            projection.apply_event(sequence);

            self.repository.save(&projection).await?;
        }

        Ok(())
    }

    async fn on_deleted(&self, event: FileShareDeletedEvent, _sequence: i64) -> Result<()> {
        self.repository.delete(event.id).await
    }
}

// ============================================================================
// CUSTOM EVENT HANDLERS
// ============================================================================
// <<< CUSTOM HANDLERS START >>>

// <<< CUSTOM HANDLERS START >>>
// Add custom event handlers here
// <<< CUSTOM HANDLERS END >>>