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import {
EmailAddresses,
KafkaEvent,
KafkaRecord,
opensearch,
SEATOOL_STATUS,
Events,
} from "shared-types";
import { decodeBase64WithUtf8, formatActionType, getSecret } from "shared-utils";
import { retry } from "shared-utils/retry";
import { Handler } from "aws-lambda";
import { getEmailTemplates, getAllStateUsers } from "libs/email";
import * as os from "libs/opensearch-lib";
import { EMAIL_CONFIG, getCpocEmail, getSrtEmails } from "libs/email/content/email-components";
import { htmlToText, HtmlToTextOptions } from "html-to-text";
import { SQSClient, SendMessageCommand } from "@aws-sdk/client-sqs";
import { getOsNamespace } from "libs/utils";
class TemporaryError extends Error {
constructor(message: string) {
super(message);
this.name = "TemporaryError";
}
}
interface ProcessEmailConfig {
emailAddressLookupSecretName: string;
applicationEndpointUrl: string;
osDomain: string;
indexNamespace?: string;
region: string;
DLQ_URL: string;
userPoolId: string;
configurationSetName: string;
isDev: boolean;
}
interface EmailTemplate {
to: string[];
cc?: string[];
subject: string;
body: string;
}
export const handler: Handler<KafkaEvent> = async (event) => {
const requiredEnvVars = [
"emailAddressLookupSecretName",
"applicationEndpointUrl",
"osDomain",
"region",
"DLQ_URL",
"userPoolId",
"configurationSetName",
"isDev",
] as const;
const missingVars = requiredEnvVars.filter((varName) => !process.env[varName]);
if (missingVars.length > 0) {
throw new Error(`Missing required environment variables: ${missingVars.join(", ")}`);
}
const emailAddressLookupSecretName = process.env.emailAddressLookupSecretName!;
const applicationEndpointUrl = process.env.applicationEndpointUrl!;
const osDomain = process.env.osDomain!;
const indexNamespace = process.env.indexNamespace;
const region = process.env.region!;
const DLQ_URL = process.env.DLQ_URL!;
const userPoolId = process.env.userPoolId!;
const configurationSetName = process.env.configurationSetName!;
const isDev = process.env.isDev!;
const config: ProcessEmailConfig = {
emailAddressLookupSecretName,
applicationEndpointUrl,
osDomain: `https://${osDomain}`,
indexNamespace,
region,
DLQ_URL,
userPoolId,
configurationSetName,
isDev: isDev === "true",
};
console.log("config: ", JSON.stringify(config, null, 2));
try {
const results = await Promise.allSettled(
Object.values(event.records)
.flat()
.map((rec) => processRecord(rec, config)),
);
console.log("results: ", JSON.stringify(results, null, 2));
const failures = results.filter((r) => r.status === "rejected");
if (failures.length > 0) {
console.error("Some records failed:", JSON.stringify(failures, null, 2));
throw new TemporaryError("Some records failed processing");
}
console.log("All records processed successfully", JSON.stringify(failures, null, 2));
} catch (error) {
console.error("Permanent failure:", error);
Eif (config.DLQ_URL) {
const sqsClient = new SQSClient({ region: config.region });
try {
await sqsClient.send(
new SendMessageCommand({
QueueUrl: config.DLQ_URL,
MessageBody: JSON.stringify({
error: error.message,
originalEvent: event,
timestamp: new Date().toISOString(),
}),
}),
);
console.log("Failed message sent to DLQ");
} catch (dlqError) {
console.error("Failed to send to DLQ:", dlqError);
throw dlqError;
}
}
throw error;
}
};
export async function processRecord(kafkaRecord: KafkaRecord, config: ProcessEmailConfig) {
console.log("processRecord called with kafkaRecord: ", JSON.stringify(kafkaRecord, null, 2));
const { key, value, timestamp } = kafkaRecord;
const id: string = decodeBase64WithUtf8(key);
if (kafkaRecord.topic === "aws.seatool.ksql.onemac.three.agg.State_Plan") {
const safeID = id.replace(/^"|"$/g, "");
const seatoolRecord: Document = {
safeID,
...JSON.parse(decodeBase64WithUtf8(value)),
};
const safeSeatoolRecord = opensearch.main.seatool.transform(safeID).safeParse(seatoolRecord);
Eif (safeSeatoolRecord.data?.seatoolStatus === SEATOOL_STATUS.WITHDRAWN) {
try {
const item = await os.getItem(config.osDomain, getOsNamespace("main"), safeID);
if (!item?.found || !item?._source) {
console.log(`The package was not found for id: ${id} in mako. Doing nothing.`);
return;
}
if (item._source.withdrawEmailSent) {
console.log("Withdraw email previously sent");
return;
}
const recordToPass = {
timestamp,
...safeSeatoolRecord.data,
submitterName: item._source.submitterName,
submitterEmail: item._source.submitterEmail,
event: "seatool-withdraw",
proposedEffectiveDate: safeSeatoolRecord.data?.proposedDate,
origin: "seatool",
};
await processAndSendEmails(recordToPass as Events[keyof Events], safeID, config);
const indexObject = {
index: getOsNamespace("main"),
id: safeID,
body: {
doc: {
withdrawEmailSent: true,
},
},
};
await os.updateData(config.osDomain, indexObject);
} catch (error) {
console.error("Error processing record:", JSON.stringify(error, null, 2));
throw error;
}
}
return;
}
Iif (typeof key !== "string") {
console.log("key is not a string ", JSON.stringify(key, null, 2));
throw new Error("Key is not a string");
}
if (!value) {
console.log("Tombstone detected. Doing nothing for this event");
return;
}
const record = {
timestamp,
...JSON.parse(decodeBase64WithUtf8(value)),
};
console.log("record: ", JSON.stringify(record, null, 2));
if (record.origin !== "mako") {
console.log("Kafka event is not of mako origin. Doing nothing.");
return;
}
try {
console.log("Config:", JSON.stringify(config, null, 2));
await processAndSendEmails(record, id, config);
} catch (error) {
console.error(
"Error processing record: { record, id, config }",
JSON.stringify({ record, id, config }, null, 2),
);
throw error;
}
}
export function validateEmailTemplate(template: any) {
const requiredFields = ["to", "subject", "body"];
const missingFields = requiredFields.filter((field) => !template[field]);
if (missingFields.length > 0) {
throw new Error(`Email template missing required fields: ${missingFields.join(", ")}`);
}
}
export async function processAndSendEmails(
record: Events[keyof Events],
id: string,
config: ProcessEmailConfig,
) {
const templates = await getEmailTemplates(record);
Iif (!templates) {
console.log(
`The kafka record has an event type that does not have email support. event: ${record.event}. Doing nothing.`,
);
return;
}
const territory = id.slice(0, 2);
const allStateUsers = await getAllStateUsers({
userPoolId: config.userPoolId,
state: territory,
});
const sec = await getSecret(config.emailAddressLookupSecretName);
const item = await retry(
() => os.getItemAndThrowAllErrors(config.osDomain, getOsNamespace("main"), id),
10,
10 * 1000,
);
Iif (!item?.found || !item?._source) {
console.log(`The package was not found for id: ${id}. Doing nothing.`);
return;
}
const cpocEmail = [...getCpocEmail(item)];
const srtEmails = [...getSrtEmails(item)];
const emails: EmailAddresses = JSON.parse(sec);
const allStateUsersEmails = allStateUsers.map((user) => user.formattedEmailAddress);
const templateVariables = {
...record,
id,
applicationEndpointUrl: config.applicationEndpointUrl,
territory,
emails: { ...emails, cpocEmail, srtEmails },
allStateUsersEmails,
...(item._source.actionType && { actionType: formatActionType(item._source.actionType) }),
};
console.log("Template variables:", JSON.stringify(templateVariables, null, 2));
const results = [];
// Process templates sequentially
for (const template of templates) {
try {
const filledTemplate = await template(templateVariables);
validateEmailTemplate(filledTemplate);
const params = createEmailParams(
filledTemplate,
emails.sourceEmail,
config.applicationEndpointUrl,
config.isDev,
);
const result = await sendEmail(params, config.region);
results.push({ success: true, result });
console.log(`Successfully sent email for template: ${JSON.stringify(result)}`);
} catch (error) {
console.error("Error processing template:", error);
results.push({ success: false, error });
// Continue with next template instead of throwing
}
}
// Log final results
const successCount = results.filter((r) => r.success).length;
const failureCount = results.filter((r) => !r.success).length;
console.log(`Email sending complete. Success: ${successCount}, Failures: ${failureCount}`);
// If all emails failed, throw an error to trigger retry/DLQ logic
Iif (failureCount === templates.length) {
throw new Error(`All ${failureCount} email(s) failed to send`);
}
return results;
}
export function createEmailParams(
filledTemplate: EmailTemplate,
sourceEmail: string,
baseUrl: string,
isDev: boolean,
): SendEmailCommandInput {
const params: SendEmailCommandInput = {
Destination: {
ToAddresses: filledTemplate.to,
CcAddresses: isDev
? [...(filledTemplate.cc || []), `State Submitter <${EMAIL_CONFIG.DEV_EMAIL}>`]
: filledTemplate.cc,
},
Message: {
Body: {
Html: { Data: filledTemplate.body, Charset: "UTF-8" },
Text: {
Data: htmlToText(filledTemplate.body, htmlToTextOptions(baseUrl)),
Charset: "UTF-8",
},
},
Subject: { Data: filledTemplate.subject, Charset: "UTF-8" },
},
Source: sourceEmail,
ConfigurationSetName: process.env.configurationSetName,
};
console.log("Email params:", JSON.stringify(params, null, 2));
return params;
}
export async function sendEmail(params: SendEmailCommandInput, region: string): Promise<any> {
const sesClient = new SESClient({ region: region });
console.log("sendEmail called with params:", JSON.stringify(params, null, 2));
const command = new SendEmailCommand(params);
try {
const result = await sesClient.send(command);
return { status: result.$metadata.httpStatusCode };
} catch (error) {
console.error("Error sending email:", error);
throw error;
}
}
const htmlToTextOptions = (baseUrl: string): HtmlToTextOptions => ({
wordwrap: 80,
preserveNewlines: true,
selectors: [
{
selector: "h1",
options: {
uppercase: true,
leadingLineBreaks: 2,
trailingLineBreaks: 1,
},
},
{
selector: "img",
options: {
ignoreHref: true,
src: true,
},
},
{
selector: "p",
options: {
leadingLineBreaks: 1,
trailingLineBreaks: 1,
},
},
{
selector: "a",
options: {
linkBrackets: ["[", "]"],
baseUrl,
hideLinkHrefIfSameAsText: true,
},
},
],
limits: {
maxInputLength: 50000,
ellipsis: "...",
maxBaseElements: 1000,
},
longWordSplit: {
forceWrapOnLimit: false,
wrapCharacters: ["-", "/"],
},
});
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