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dynamodb.js
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dynamodb.js
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// @ts-check
import process from 'node:process'
import { DynamoDBClient } from '@aws-sdk/client-dynamodb'
import { DynamoDBDocumentClient } from '@aws-sdk/lib-dynamodb'
import AWSXRay from 'aws-xray-sdk-core'
/** @type DynamoDBClient */
// @ts-ignore
export const client = new DynamoDBClient({
// eslint-disable-next-line unicorn/no-null
logger: null
})
/** @type DynamoDBDocumentClient */
export default trace(createDocumentClient())
function createDocumentClient() {
client.middlewareStack.add(
(next, context) => (args) => {
if (
context.commandName === 'UpdateItemCommand' ||
context.commandName === 'PutItemCommand' ||
context.commandName === 'BatchWriteItemCommand'
) {
// @ts-ignore
const correlationIds = globalThis[Symbol.for('correlationIds')] ?? {}
const userId = correlationIds['x-correlation-user-id']
/** @type any */
const input = args.input
const addCid =
!input.ExpressionAttributeNames?.['#cid'] &&
input.ExpressionAttributeValues?.[':cid'] === undefined
switch (context.commandName) {
case 'UpdateItemCommand': {
input.ExpressionAttributeNames =
input.ExpressionAttributeNames || {}
input.ExpressionAttributeValues =
input.ExpressionAttributeValues || {}
if (userId) {
if (/set /i.test(input.UpdateExpression)) {
input.UpdateExpression = addCid
? input.UpdateExpression.replace(
/set /i,
'set #modifiedBy = :modifiedBy, #modifiedAt = :modifiedAt, #cid = :cid, '
)
: input.UpdateExpression.replace(
/set /i,
'set #modifiedBy = :modifiedBy, #modifiedAt = :modifiedAt, '
)
} else {
input.UpdateExpression += addCid
? ' set #modifiedBy = :modifiedBy, #modifiedAt = :modifiedAt, #cid = :cid'
: ' set #modifiedBy = :modifiedBy, #modifiedAt = :modifiedAt'
}
input.ExpressionAttributeValues[':modifiedBy'] = userId
input.ExpressionAttributeNames['#modifiedBy'] = 'modifiedBy'
} else {
if (/set /i.test(input.UpdateExpression)) {
input.UpdateExpression = addCid
? input.UpdateExpression.replace(
/set /i,
'set #modifiedAt = :modifiedAt, #cid = :cid, '
)
: input.UpdateExpression.replace(
/set /i,
'set #modifiedAt = :modifiedAt, '
)
} else {
input.UpdateExpression += addCid
? ' set #modifiedAt = :modifiedAt, #cid = :cid'
: ' set #modifiedAt = :modifiedAt'
}
}
input.ExpressionAttributeValues[':modifiedAt'] = Date.now()
input.ExpressionAttributeNames['#modifiedAt'] = 'modifiedAt'
if (addCid) {
input.ExpressionAttributeValues[':cid'] = correlationIds
input.ExpressionAttributeNames['#cid'] = 'correlationIds'
}
break
}
case 'PutItemCommand': {
if (userId) input.Item.createdBy = userId
input.Item.createdAt = Date.now()
if (input.Item.correlationIds === undefined) {
input.Item.correlationIds = correlationIds
}
break
}
case 'BatchWriteItemCommand': {
for (const table of Object.keys(input.RequestItems)) {
for (const item of input.RequestItems[table]) {
if (item.PutRequest) {
if (userId) {
item.PutRequest.Item.createdBy = userId
}
item.PutRequest.Item.createdAt = Date.now()
if (item.PutRequest.Item.correlationIds === undefined) {
item.PutRequest.Item.correlationIds = correlationIds
}
}
}
}
break
}
// No default
}
}
return next(args)
},
{
step: 'initialize',
name: 'addTraceData',
tags: ['metadata', 'traceData']
}
)
return DynamoDBDocumentClient.from(client, {
marshallOptions: {
convertEmptyValues: false,
removeUndefinedValues: true,
convertClassInstanceToMap: false
},
unmarshallOptions: {
wrapNumbers: false
}
})
}
function trace(/** @type any */ client) {
return process.env.LAMBDA_TASK_ROOT && process.env.AWS_EXECUTION_ENV
? AWSXRay.captureAWSv3Client(client)
: client
}