somod-chat-service/build/serverless/functions/thread.js

Serverless Chat Service from SOMOD

import { DynamoDBClient, GetItemCommand, PutItemCommand, UpdateItemCommand } from "@aws-sdk/client-dynamodb";
import { convertToAttr, marshall, unmarshall } from "@aws-sdk/util-dynamodb";
import { RouteBuilder } from "somod-http-extension";
import { v1 as v1uuid } from "uuid";
const builder = new RouteBuilder();
const dynamodb = new DynamoDBClient();
const createThread = async (request) => {
    const now = Date.now();
    const thread = {
        ...request.body,
        id: v1uuid().split("-").join(""),
        createdAt: now
    };
    const putItemCommand = new PutItemCommand({
        TableName: process.env.THREAD_TABLE_NAME + "",
        Item: marshall(thread),
        ConditionExpression: "attribute_not_exists(#id)",
        ExpressionAttributeNames: {
            "#id": "id"
        }
    });
    await dynamodb.send(putItemCommand);
    return {
        statusCode: 200,
        headers: { "Content-Type": "application/json; charset=utf-8" },
        body: JSON.stringify(thread)
    };
};
const getThread = async (request) => {
    const getItemCommand = new GetItemCommand({
        TableName: process.env.THREAD_TABLE_NAME + "",
        Key: marshall({ id: request.parameters.path.id })
    });
    const result = await dynamodb.send(getItemCommand);
    return result.Item
        ? {
            statusCode: 200,
            headers: { "Content-Type": "application/json; charset=utf-8" },
            body: JSON.stringify(unmarshall(result.Item))
        }
        : { statusCode: 404 };
};
const updateSessionRequired = async (request) => {
    const updateItemCommand = new UpdateItemCommand({
        TableName: process.env.THREAD_TABLE_NAME + "",
        Key: marshall({ id: request.parameters.path.id }),
        UpdateExpression: "SET #sessionRequired = :sessionRequired, #sessionRequiredTill = :sessionRequiredTill",
        ExpressionAttributeNames: {
            "#sessionRequired": "sessionRequired",
            "#sessionRequiredTill": "sessionRequiredTill"
        },
        ExpressionAttributeValues: {
            ":sessionRequired": convertToAttr(request.body.sessionRequired),
            ":sessionRequiredTill": convertToAttr(request.body.sessionRequiredTill)
        }
    });
    await dynamodb.send(updateItemCommand);
    return {
        statusCode: 200,
        headers: { "Content-Type": "application/json; charset=utf-8" },
        body: JSON.stringify({ message: "Thread updated successfully" })
    };
};
builder.add("/thread", "POST", createThread);
builder.add("/thread/{id}", "GET", getThread);
builder.add("/thread/{id}/session", "POST", updateSessionRequired);
export default builder.getHandler();