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import { ToolListUnion, FunctionDeclaration } from '@google/genai';
import { Tool } from './tools.js';
class ToolRegistry {
private tools: Map<string, Tool> = new Map();
/**
* Registers a tool definition.
* @param tool - The tool object containing schema and execution logic.
*/
registerTool(tool: Tool): void {
if (this.tools.has(tool.name)) {
// Decide on behavior: throw error, log warning, or allow overwrite
console.warn(
`Tool with name "${tool.name}" is already registered. Overwriting.`,
);
}
this.tools.set(tool.name, tool);
}
/**
* Retrieves the list of tool schemas in the format required by Gemini.
* @returns A ToolListUnion containing the function declarations.
*/
getToolSchemas(): ToolListUnion {
const declarations: FunctionDeclaration[] = [];
this.tools.forEach((tool) => {
declarations.push(tool.schema);
});
// Return Gemini's expected format. Handle the case of no tools.
if (declarations.length === 0) {
// Depending on the SDK version, you might need `undefined`, `[]`, or `[{ functionDeclarations: [] }]`
// Check the documentation for your @google/genai version.
// Let's assume an empty array works or signifies no tools.
return [];
// Or if it requires the structure:
// return [{ functionDeclarations: [] }];
}
return [{ functionDeclarations: declarations }];
}
/**
* Optional: Get a list of registered tool names.
*/
listAvailableTools(): string[] {
return Array.from(this.tools.keys());
}
/**
* Get the definition of a specific tool.
*/
getTool(name: string): Tool | undefined {
return this.tools.get(name);
}
}
// Export a singleton instance of the registry
export const toolRegistry = new ToolRegistry();
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