coderlib 0.1.0

A Rust library for AI-powered code assistance and agentic system
Documentation 
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//! In-memory storage implementation for CoderLib
//!
//! This module provides a simple in-memory storage for testing and development.

use async_trait::async_trait;
use chrono::{DateTime, Utc};
use std::collections::HashMap;
use std::sync::Arc;
use tokio::sync::RwLock;

use crate::core::error::StorageError;
use crate::core::session::Session;
use crate::storage::{Storage, Message, StorageStatistics};

/// In-memory storage implementation
pub struct MemoryStorage {
    sessions: Arc<RwLock<HashMap<String, Session>>>,
    messages: Arc<RwLock<HashMap<String, Vec<Message>>>>,
}

impl MemoryStorage {
    /// Create a new in-memory storage instance
    pub fn new() -> Self {
        Self {
            sessions: Arc::new(RwLock::new(HashMap::new())),
            messages: Arc::new(RwLock::new(HashMap::new())),
        }
    }
}

impl Default for MemoryStorage {
    fn default() -> Self {
        Self::new()
    }
}

#[async_trait]
impl Storage for MemoryStorage {
    async fn create_session(&self, session: &Session) -> Result<String, StorageError> {
        let mut sessions = self.sessions.write().await;
        sessions.insert(session.id.clone(), session.clone());
        Ok(session.id.clone())
    }
    
    async fn get_session(&self, id: &str) -> Result<Option<Session>, StorageError> {
        let sessions = self.sessions.read().await;
        Ok(sessions.get(id).cloned())
    }
    
    async fn update_session(&self, session: &Session) -> Result<(), StorageError> {
        let mut sessions = self.sessions.write().await;
        sessions.insert(session.id.clone(), session.clone());
        Ok(())
    }
    
    async fn delete_session(&self, id: &str) -> Result<(), StorageError> {
        let mut sessions = self.sessions.write().await;
        let mut messages = self.messages.write().await;
        
        sessions.remove(id);
        messages.remove(id);
        
        Ok(())
    }
    
    async fn list_sessions(&self) -> Result<Vec<Session>, StorageError> {
        let sessions = self.sessions.read().await;
        Ok(sessions.values().cloned().collect())
    }
    
    async fn save_message(&self, message: &Message) -> Result<String, StorageError> {
        let mut messages = self.messages.write().await;
        let session_messages = messages.entry(message.session_id.clone()).or_insert_with(Vec::new);
        session_messages.push(message.clone());
        Ok(message.id.clone())
    }
    
    async fn get_messages(&self, session_id: &str) -> Result<Vec<Message>, StorageError> {
        let messages = self.messages.read().await;
        Ok(messages.get(session_id).cloned().unwrap_or_default())
    }
    
    async fn delete_message(&self, id: &str) -> Result<(), StorageError> {
        let mut messages = self.messages.write().await;
        
        for session_messages in messages.values_mut() {
            session_messages.retain(|msg| msg.id != id);
        }
        
        Ok(())
    }
    
    async fn search_messages(&self, query: &str) -> Result<Vec<Message>, StorageError> {
        let messages = self.messages.read().await;
        let mut results = Vec::new();
        
        for session_messages in messages.values() {
            for message in session_messages {
                // Simple text search in message content
                let content_str = serde_json::to_string(&message.content).unwrap_or_default();
                if content_str.to_lowercase().contains(&query.to_lowercase()) {
                    results.push(message.clone());
                }
            }
        }
        
        Ok(results)
    }
    
    async fn get_statistics(&self) -> Result<StorageStatistics, StorageError> {
        let sessions = self.sessions.read().await;
        let messages = self.messages.read().await;
        
        let total_sessions = sessions.len() as u64;
        let total_messages: u64 = messages.values().map(|msgs| msgs.len() as u64).sum();
        
        let oldest_session = sessions.values()
            .map(|s| s.created_at)
            .min();
        
        let newest_session = sessions.values()
            .map(|s| s.updated_at)
            .max();
        
        let avg_messages_per_session = if total_sessions > 0 {
            total_messages as f64 / total_sessions as f64
        } else {
            0.0
        };
        
        Ok(StorageStatistics {
            total_sessions,
            total_messages,
            storage_size: 0, // Memory usage is not tracked
            oldest_session,
            newest_session,
            avg_messages_per_session,
        })
    }
    
    async fn cleanup(&self, older_than: DateTime<Utc>) -> Result<u64, StorageError> {
        let mut sessions = self.sessions.write().await;
        let mut messages = self.messages.write().await;
        
        let mut removed_count = 0;
        let sessions_to_remove: Vec<String> = sessions
            .iter()
            .filter(|(_, session)| session.updated_at < older_than)
            .map(|(id, _)| id.clone())
            .collect();
        
        for session_id in sessions_to_remove {
            sessions.remove(&session_id);
            messages.remove(&session_id);
            removed_count += 1;
        }
        
        Ok(removed_count)
    }
}