/**
* Base class for database-related errors
*/
export class DatabaseError extends Error {
constructor(
message: string,
public readonly code?: string,
public readonly originalError?: Error
) {
super(message)
this.name = 'DatabaseError'
}
}
/**
* Error thrown when connection fails
*/
export class ConnectionError extends DatabaseError {
constructor(message: string, originalError?: Error) {
super(message, 'CONNECTION_ERROR', originalError)
this.name = 'ConnectionError'
}
}
/**
* Error thrown when query execution fails
*/
export class QueryError extends DatabaseError {
constructor(message: string, originalError?: Error) {
super(message, 'QUERY_ERROR', originalError)
this.name = 'QueryError'
}
}
/**
* Error thrown when input validation fails
*/
export class ValidationError extends DatabaseError {
constructor(message: string) {
super(message, 'VALIDATION_ERROR')
this.name = 'ValidationError'
}
}
/**
* Error thrown when operation is not allowed in current mode
*/
export class PermissionError extends DatabaseError {
constructor(message: string) {
super(message, 'PERMISSION_ERROR')
this.name = 'PermissionError'
}
}
/**
* Error thrown when not connected to database
*/
export class NotConnectedError extends DatabaseError {
constructor() {
super('Not connected to database. Use connect-database first.', 'NOT_CONNECTED')
this.name = 'NotConnectedError'
}
}
/**
* Format error for MCP tool response
*/
export function formatErrorResponse(error: unknown): {
content: Array<{ type: 'text'; text: string }>
isError: true
} {
const message = error instanceof Error ? error.message : String(error)
return {
content: [{
type: 'text' as const,
text: JSON.stringify({ success: false, error: message }, null, 2)
}],
isError: true
}
}
/**
* Format success response for MCP tool
*/
export function formatSuccessResponse(data: unknown): {
content: Array<{ type: 'text'; text: string }>
} {
return {
content: [{
type: 'text' as const,
text: JSON.stringify({ success: true, ...data as object }, null, 2)
}]
}
}
