translations

Instructions

Implementation Reference

• src/handlers/resources.ts:31-63 (handler)

  Main handler for the 'translations' MCP tool: validates input with translationsSchema, invokes translationsService.listTranslations(validatedArgs), logs verbose response, returns formatted JSON content or standardized error.

  export async function handleTranslations(args: any) {
    try {
      // Validate arguments
      const validatedArgs = translationsSchema.parse(args);
      
      // Call the service
      const result = await translationsService.listTranslations(validatedArgs);
      
      // Log the response in verbose mode
      verboseLog('response', {
        tool: 'translations',
        result
      });
      
      return {
        content: [
          {
            type: "text",
            text: JSON.stringify(result, null, 2)
          }
        ]
      };
    } catch (error) {
      verboseLog('error', {
        tool: 'translations',
        error: error instanceof Error ? error.message : String(error)
      });
      
      // Use the standardized error response utility
      const { createErrorResponse } = require('../utils/error-handler');
      return createErrorResponse(error, 'translations');
    }
  }

• src/schemas/translations.ts:31-34 (schema)

  Zod input validation schema for the 'translations' tool, defining optional 'language' parameter.

  export const translationsSchema = z.object({
    language: z.string().optional().describe("Language"),
  });

• src/server.ts:191-196 (registration)

  MCP tool registration for 'translations' in server.setRequestHandler(ListToolsRequestSchema): specifies name, description, inputSchema from aggregated schemas, and examples.

  {
    name: ApiTools.translations,
    description: "Get list of available translations",
    inputSchema: zodToJsonSchema(translationsSchemas.translations),
    examples: toolExamples['translations'],
  },

• src/services/translations-service.ts:38-127 (helper)

  Core business logic for listing translations: caches results, fetches from Quran.com API (/resources/translations), falls back to mock data on API errors or validation issues.

  async listTranslations(params: z.infer<typeof translationsSchema>): Promise<TranslationsResponse> {
    try {
      // Validate parameters
      const validatedParams = translationsSchema.parse(params);
      
      // Check cache first
      const now = Date.now();
      if (this.translationsCache && (now - this.cacheTimestamp < CACHE_DURATION_MS)) {
        verboseLog('response', {
          method: 'listTranslations',
          source: 'cache',
          age: `${(now - this.cacheTimestamp) / 1000} seconds`
        });
        
        return {
          success: true,
          message: "translations executed successfully (from cache)",
          data: this.translationsCache
        };
      }
      
      try {
        // Make request to Quran.com API
        const url = `${API_BASE_URL}/resources/translations`;
        const response = await makeApiRequest(url, {
          language: validatedParams.language
        });
        
        verboseLog('response', {
          method: 'listTranslations',
          source: 'api',
          dataSize: JSON.stringify(response).length
        });
        
        // Update cache
        this.translationsCache = response;
        this.cacheTimestamp = now;
        
        return {
          success: true,
          message: "translations executed successfully",
          data: response
        };
      } catch (axiosError) {
        verboseLog('error', {
          method: 'listTranslations',
          error: axiosError instanceof Error ? axiosError.message : String(axiosError)
        });
        
        // If the API call fails, return mock data
        verboseLog('response', {
          method: 'listTranslations',
          source: 'mock',
          reason: 'API unavailable'
        });
        
        const mockData = this.getTranslationsMockData();
        
        return {
          success: true,
          message: "translations executed with mock data (API unavailable)",
          data: mockData
        };
      }
    } catch (error) {
      verboseLog('error', {
        method: 'listTranslations',
        error: error instanceof Error ? error.message : String(error)
      });
      
      if (error instanceof z.ZodError) {
        throw new ApiError(`Validation error: ${error.errors.map(e => `${e.path.join('.')}: ${e.message}`).join(', ')}`, 400);
      }
      
      // Return mock data as a fallback for any error
      verboseLog('response', {
        method: 'listTranslations',
        source: 'mock',
        reason: 'error occurred'
      });
      
      const mockData = this.getTranslationsMockData();
      
      return {
        success: true,
        message: "translations executed with mock data (error occurred)",
        data: mockData
      };
    }
  }

• src/server.ts:288-291 (registration)

  Dispatch handler in server.setRequestHandler(CallToolRequestSchema): routes 'translations' tool calls to handleTranslations function.

  // Translation-related tools
  case ApiTools.translations:
    return await handleTranslations(request.params.arguments);
  case ApiTools.translation_info: