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UserCheckLambda.js
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UserCheckLambda.js
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'use strict';
const AWS = require('aws-sdk');
const docClient = new AWS.DynamoDB.DocumentClient();
async function listItems(){
const params = {
TableName : 'UsersTable-dev'
};
try {
const data = await docClient.scan(params).promise();
return data;
} catch (err) {
return err;
}
}
async function getItem(event){
const params = {
TableName : 'UsersTable-dev',
/* Item properties will depend on your application concerns */
Key: {
user_id : JSON.parse(event.body).user_id
}
};
try {
const data = await docClient.get(params).promise();
return data;
} catch (err) {
return err;
}
}
async function updateItem(event){
const params = {
TableName: 'UsersTable-dev',
Key: {
"user_id" : JSON.parse(event.body).user_id
},
UpdateExpression: "set display_id = :d",
ExpressionAttributeValues: {
":d" : JSON.parse(event.body).display_id
},
ReturnValues: "UPDATED_NEW"
};
try {
const data = await docClient.update(params).promise();
return data;
} catch (err) {
return err;
}
}
exports.handler = async (event) => {
const operation = event.httpMethod;
switch(operation){
case 'GET':
try {
const data = await listItems();
return { body: JSON.stringify(data) };
} catch (err) {
return { error: err};
}
case 'POST':
try {
const data = await getItem(event);
return { body: JSON.stringify(data)};
} catch (err) {
return { error: err};
}
case 'PUT':
try {
const data = await updateItem(event);
return { body: JSON.stringify(data)};
} catch (err) {
return { error: err};
}
}
// // TODO implement
// const response = {
// statusCode: 200,
// // Uncomment below to enable CORS requests
// // headers: {
// // "Access-Control-Allow-Origin": "*",
// // "Access-Control-Allow-Headers": "*"
// // },
// body: JSON.stringify('Hello from Lambda!'),
// };
// return response;
};