@dondonudonjp/vertexai-imagen-mcp-server/build/tools/generateFromTemplate.js

[DEPRECATED] MCP Server for Vertex AI Imagen image generation. Imagen endpoints shut down 2026-06-30; migrate to the nanoBanana MCP Server (Gemini image models).

import { McpError, ErrorCode } from '@modelcontextprotocol/sdk/types.js';
import { loadTemplate, substituteVariables, validateVariables } from '../utils/templateManager.js';
import { generateImage as handleGenerateImage } from './generateImage.js';
/**
 * テンプレートから画像を生成
 */
export async function generateFromTemplate(context, args) {
    const { template_name, variable_values, override_params } = args;
    if (!template_name || typeof template_name !== 'string') {
        throw new McpError(ErrorCode.InvalidParams, 'template_name is required and must be a string');
    }
    if (!variable_values || typeof variable_values !== 'object') {
        throw new McpError(ErrorCode.InvalidParams, 'variable_values is required and must be an object');
    }
    try {
        // テンプレートを読み込み
        const template = await loadTemplate(template_name);
        if (!template) {
            throw new McpError(ErrorCode.InvalidParams, `Template "${template_name}" not found`);
        }
        // 変数のバリデーション
        const validation = validateVariables(template.template, variable_values);
        if (!validation.valid) {
            throw new McpError(ErrorCode.InvalidParams, `Missing required variables: ${validation.missing.join(', ')}`);
        }
        // プロンプトを生成
        const prompt = substituteVariables(template.template, variable_values);
        // パラメータをマージ（default_params + override_params）
        const mergedParams = {
            prompt,
            ...template.default_params,
            ...override_params,
        };
        // generate_image を呼び出し
        const result = await handleGenerateImage(context, mergedParams);
        // 結果にテンプレート情報を追加
        if (result.content && result.content.length > 0 && result.content[0].type === 'text') {
            const originalText = result.content[0].text;
            const templateInfo = `\n\n---\n\nGenerated from template: ${template.name}\n` +
                `Variables used: ${Object.entries(variable_values).map(([k, v]) => `${k}="${v}"`).join(', ')}\n` +
                `Final prompt: ${prompt}`;
            result.content[0].text = originalText + templateInfo;
        }
        return result;
    }
    catch (error) {
        if (error instanceof McpError) {
            throw error;
        }
        const errorMessage = error instanceof Error ? error.message : String(error);
        throw new McpError(ErrorCode.InternalError, `Failed to generate from template: ${errorMessage}`);
    }
}
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