@energica-city/shared-amplify-utils
Version:
Shared utilities for AWS Amplify projects
85 lines • 12.4 kB
JavaScript
import { logger } from '../../log';
import { buildWebSocketContext, getErrorMessage } from './utils';
export function createWebSocketModelInitializer(config) {
const { schema, amplifyOutputs, entities, clientKey = 'default', timeout = 5000, } = config;
let isInitialized = false;
let initPromise = null;
const initialize = async (input) => {
const context = buildWebSocketContext(input);
try {
const { initializeQueries } = await import('../../queries');
logger.debug('WebSocket Model Initializer - Initializing queries', {
...context,
entities: entities ?? 'all',
});
const db = await Promise.race([
initializeQueries({
amplifyOutputs,
schema,
entities,
clientKey,
}),
new Promise((_, reject) => setTimeout(() => reject(new Error(`Initialization timeout after ${timeout}ms`)), timeout)),
]);
// Create a properly typed models object
const models = {};
const modelKeys = entities ?? Object.keys(schema.models || {});
for (const modelName of modelKeys) {
const instance = db[modelName];
if (instance) {
models[modelName] = instance;
}
}
logger.info('WebSocket Model Initializer - Models initialized successfully', {
...context,
modelCount: Object.keys(models).length,
models: Object.keys(models),
});
return models;
}
catch (error) {
logger.error('WebSocket Model Initializer - Initialization failed', {
...context,
error: getErrorMessage(error),
});
throw error;
}
};
return async (input, next) => {
const context = buildWebSocketContext(input);
try {
if (isInitialized && initPromise) {
const models = await initPromise;
return await next({ ...input, models });
}
if (!initPromise) {
logger.info('WebSocket Model Initializer - Starting', context);
initPromise = initialize(input);
}
const models = await initPromise;
isInitialized = true;
logger.info('WebSocket Model Initializer - Complete', {
...context,
modelCount: Object.keys(models).length,
});
return await next({ ...input, models });
}
catch (error) {
const message = getErrorMessage(error);
logger.error('WebSocket Model Initializer - Failed', {
...context,
error: message,
});
isInitialized = false;
initPromise = null;
return {
statusCode: 500,
body: JSON.stringify({
error: 'Model initialization failed',
message,
}),
};
}
};
}
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'all',\n      });\n\n      const db = await Promise.race([\n        initializeQueries<TSchema, TTypes>({\n          amplifyOutputs,\n          schema,\n          entities,\n          clientKey,\n        }),\n        new Promise<never>((_, reject) =>\n          setTimeout(\n            () =>\n              reject(new Error(`Initialization timeout after ${timeout}ms`)),\n            timeout,\n          ),\n        ),\n      ]);\n\n      // Create a properly typed models object\n      const models: {\n        [K in keyof TTypes]: QueryFactoryResult<K & string, TTypes>;\n      } = {} as {\n        [K in keyof TTypes]: QueryFactoryResult<K & string, TTypes>;\n      };\n\n      const modelKeys = entities ?? Object.keys(schema.models || {});\n\n      for (const modelName of modelKeys) {\n        const instance = db[modelName as keyof typeof db];\n        if (instance) {\n          models[modelName as keyof TTypes] = instance as QueryFactoryResult<\n            typeof modelName & string,\n            TTypes\n          >;\n        }\n      }\n\n      logger.info(\n        'WebSocket Model Initializer - Models initialized successfully',\n        {\n          ...context,\n          modelCount: Object.keys(models).length,\n          models: Object.keys(models),\n        },\n      );\n\n      return models;\n    } catch (error) {\n      logger.error('WebSocket Model Initializer - Initialization failed', {\n        ...context,\n        error: getErrorMessage(error),\n      });\n      throw error;\n    }\n  };\n\n  return async (input, next) => {\n    const context = buildWebSocketContext(input);\n\n    try {\n      if (isInitialized && initPromise) {\n        const models = await initPromise;\n        return await next({ ...input, models });\n      }\n\n      if (!initPromise) {\n        logger.info('WebSocket Model Initializer - Starting', context);\n        initPromise = initialize(input);\n      }\n\n      const models = await initPromise;\n      isInitialized = true;\n\n      logger.info('WebSocket Model Initializer - Complete', {\n        ...context,\n        modelCount: Object.keys(models).length,\n      });\n\n      return await next({ ...input, models });\n    } catch (error) {\n      const message = getErrorMessage(error);\n      logger.error('WebSocket Model Initializer - Failed', {\n        ...context,\n        error: message,\n      });\n\n      isInitialized = false;\n      initPromise = null;\n\n      return {\n        statusCode: 500,\n        body: JSON.stringify({\n          error: 'Model initialization failed',\n          message,\n        }),\n      } as TReturn;\n    }\n  };\n}\n"]}