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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/**
* Database configuration
*
* This module provides database configuration and connection management
*/
<span class="cstat-no" title="statement not covered" >import { PrismaClient } from '@prisma/client';</span>
<span class="cstat-no" title="statement not covered" >import { logger } from '../utils/logger';</span>
/**
* Database configuration options
*/
export interface DatabaseConfig {
/**
* Maximum number of connections in pool
*/
maxConnections?: number;
/**
* Connection timeout in milliseconds
*/
connectionTimeout?: number;
/**
* Enable query logging
*/
enableLogging?: boolean;
/**
* Database URL
*/
url?: string;
}
/**
* Default database configuration
*/
const defaultConfig: DatabaseConfig = <span class="cstat-no" title="statement not covered" >{</span>
maxConnections: 10,
connectionTimeout: 30000,
enableLogging: process.env.NODE_ENV !== 'production',
url: process.env.DATABASE_URL
};
/**
* Database client singleton
*/
<span class="cstat-no" title="statement not covered" >export class D</span>atabase {
private static instance: Database;
private client: PrismaClient;
private config: DatabaseConfig;
private <span class="cstat-no" title="statement not covered" >isConnected: boolean = false;</span>
/**
* Create database instance with configuration
* @param config Database configuration
*/
<span class="fstat-no" title="function not covered" > private constructor(c</span>onfig: DatabaseConfig = <span class="branch-0 cbranch-no" title="branch not covered" >{})</span> {
<span class="cstat-no" title="statement not covered" > this.config = { ...defaultConfig, ...config };</span>
// Initialize Prisma client with logging options
<span class="cstat-no" title="statement not covered" > this.client = new PrismaClient({</span>
log: this.config.enableLogging
? [
{ emit: 'stdout', level: 'query' },
{ emit: 'stdout', level: 'error' },
{ emit: 'stdout', level: 'info' },
{ emit: 'stdout', level: 'warn' },
]
: []
});
// Log database operations in development
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (this.config.enableLogging) {</span>
<span class="cstat-no" title="statement not covered" > logger.info('Database logging enabled');</span>
}
}
/**
* Get singleton database instance
* @param config Database configuration
* @returns Database instance
*/
public <span class="fstat-no" title="function not covered" >static </span>getInstance(config?: DatabaseConfig): Database {
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (!Database.instance) {</span>
<span class="cstat-no" title="statement not covered" > Database.instance = new Database(config);</span>
}
<span class="cstat-no" title="statement not covered" > return Database.instance;</span>
}
/**
* Get Prisma client
* @returns Prisma client
*/
public <span class="fstat-no" title="function not covered" >getClient(</span>): PrismaClient {
<span class="cstat-no" title="statement not covered" > return this.client;</span>
}
/**
* Connect to database
* @returns Promise resolving when connected
*/
public <span class="fstat-no" title="function not covered" >async </span>connect(): Promise<void> {
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (this.isConnected) {</span>
<span class="cstat-no" title="statement not covered" > return;</span>
}
<span class="cstat-no" title="statement not covered" > try {</span>
<span class="cstat-no" title="statement not covered" > await this.client.$connect();</span>
<span class="cstat-no" title="statement not covered" > this.isConnected = true;</span>
<span class="cstat-no" title="statement not covered" > logger.info('Connected to database');</span>
} catch (error) {
<span class="cstat-no" title="statement not covered" > logger.error('Failed to connect to database:', error);</span>
<span class="cstat-no" title="statement not covered" > throw error;</span>
}
}
/**
* Disconnect from database
* @returns Promise resolving when disconnected
*/
public <span class="fstat-no" title="function not covered" >async </span>disconnect(): Promise<void> {
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (!this.isConnected) {</span>
<span class="cstat-no" title="statement not covered" > return;</span>
}
<span class="cstat-no" title="statement not covered" > try {</span>
<span class="cstat-no" title="statement not covered" > await this.client.$disconnect();</span>
<span class="cstat-no" title="statement not covered" > this.isConnected = false;</span>
<span class="cstat-no" title="statement not covered" > logger.info('Disconnected from database');</span>
} catch (error) {
<span class="cstat-no" title="statement not covered" > logger.error('Failed to disconnect from database:', error);</span>
<span class="cstat-no" title="statement not covered" > throw error;</span>
}
}
/**
* Execute function within a transaction
* @param fn Function to execute within transaction
* @returns Result of function
*/
public <span class="fstat-no" title="function not covered" >async </span>transaction<T>(fn: (tx: any) => Promise<T>): Promise<T> {
<span class="cstat-no" title="statement not covered" > try {</span>
<span class="cstat-no" title="statement not covered" > return await this.client.$transaction(<span class="fstat-no" title="function not covered" >async </span>(tx: any) => {</span>
<span class="cstat-no" title="statement not covered" > return await fn(tx);</span>
});
} catch (error) {
<span class="cstat-no" title="statement not covered" > logger.error('Transaction error:', error);</span>
<span class="cstat-no" title="statement not covered" > throw error;</span>
}
}
/**
* Check if connected to database
* @returns True if connected
*/
public <span class="fstat-no" title="function not covered" >isConnectedToDatabase(</span>): boolean {
<span class="cstat-no" title="statement not covered" > return this.isConnected;</span>
}
/**
* Get current database configuration
* @returns Database configuration
*/
public <span class="fstat-no" title="function not covered" >getConfig(</span>): DatabaseConfig {
<span class="cstat-no" title="statement not covered" > return { ...this.config };</span>
}
}
// Export singleton instance
export const <span class="cstat-no" title="statement not covered" >db = Database.getInstance();</span>
// Export Prisma client for direct access
export const <span class="cstat-no" title="statement not covered" >prisma = db.getClient();</span>
</pre></td></tr></table></pre>
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