@cdkx/aws-sns-subscriptions
Version:
AWS SNS extended subscriptions
102 lines • 13.9 kB
JavaScript
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define("@cdkx/aws-sns-subscriptions/handlers/slack-subscription-handler", ["require", "exports", "@cdkx/aws-sns-subscriptions/handlers/base-sns-handler", "aws-sdk", "@cdkx/aws-sns-subscriptions/handlers/slack.service", "@cdkx/aws-sns-subscriptions/handlers/slack-blocks-builder"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.SlackSubscriptionHandler = void 0;
const base_sns_handler_1 = require("@cdkx/aws-sns-subscriptions/handlers/base-sns-handler");
const aws_sdk_1 = require("aws-sdk");
const slack_service_1 = require("@cdkx/aws-sns-subscriptions/handlers/slack.service");
const slack_blocks_builder_1 = require("@cdkx/aws-sns-subscriptions/handlers/slack-blocks-builder");
class SlackSubscriptionHandler extends base_sns_handler_1.BaseSNSHandler {
constructor() {
super();
this.ssmClient = new aws_sdk_1.SSM({
apiVersion: '2014-11-06',
});
}
runExec(event) {
var _a;
return __awaiter(this, void 0, void 0, function* () {
const configParamName = process.env.CONFIG_PARAM;
if (!configParamName) {
console.error(`Missing required config parameter.`);
return;
}
const rawParamValue = yield this.ssmClient
.getParameter({
Name: configParamName,
})
.promise();
if (!((_a = rawParamValue.Parameter) === null || _a === void 0 ? void 0 : _a.Value)) {
console.error(`Could not resolve parameter "${configParamName}" from store.`);
return;
}
const slackConfig = JSON.parse(rawParamValue.Parameter.Value);
const { authToken, channelName, channelTypes } = slackConfig;
let { channelId } = slackConfig;
if (!authToken) {
console.error(`Auth Token is required for sending notifications to slack, refer to https://api.slack.com/bot-users`);
return;
}
const slackService = new slack_service_1.SlackService(authToken);
if (!channelId) {
// if no channel id is provided, find one and save it back in param store,
// so subsequent runs do not need to fetch it from slack api again
const resolvedChannelId = yield slackService.getChannelIdByChannelName(channelName, channelTypes);
if (!resolvedChannelId) {
console.warn(`Could not resolve channel id for channel ${channelId}, message will to first channel matching ${channelName}.`);
}
if (resolvedChannelId) {
channelId = resolvedChannelId.id;
yield this.ssmClient
.putParameter({
Name: configParamName,
Value: JSON.stringify(Object.assign(Object.assign({}, slackConfig), { channelId })),
Overwrite: true,
})
.promise();
}
}
const { Message, Subject, UnsubscribeUrl, Timestamp, MessageId, TopicArn, } = this.getParsedEvent(event);
const subject = !Subject || Subject === 'null' ? 'New Notification' : Subject;
const defaultMessageTemplate = new slack_blocks_builder_1.SlackBlocksBuilder(channelName).getDefaultTemplate({
subject,
message: Message,
messageId: MessageId,
timestamp: Timestamp,
topicArn: TopicArn,
unsubscribeUrl: UnsubscribeUrl,
});
const postMessageResponse = yield slackService.webClient.chat.postMessage({
token: authToken,
channel: channelId !== null && channelId !== void 0 ? channelId : channelName,
text: subject,
blocks: defaultMessageTemplate,
});
if (!postMessageResponse.ok) {
console.error('Could Not post notification to slack', 'Please request permissions for scope "chat:write:bot", and make sure bot is in the channel.');
return this.bail(postMessageResponse.error);
}
return { success: true };
});
}
}
exports.SlackSubscriptionHandler = SlackSubscriptionHandler;
});
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{ SNSEvent } from 'aws-lambda';\nimport { BaseSNSHandler } from './base-sns-handler';\nimport { SSM } from 'aws-sdk';\nimport { ISlackConfigParam } from '../subscriptions/slack-subscription';\nimport { SlackService } from './slack.service';\nimport { SlackBlocksBuilder } from './slack-blocks-builder';\n\nexport interface ISlackSNSMessage {\n  message: string;\n  subject: string;\n  unsubscribeUrl: string;\n  timestamp: string;\n  messageId: string;\n  topicArn: string;\n}\n\nexport class SlackSubscriptionHandler extends BaseSNSHandler {\n  private ssmClient: SSM;\n  constructor() {\n    super();\n    this.ssmClient = new SSM({\n      apiVersion: '2014-11-06',\n    });\n  }\n  async runExec(event: SNSEvent): Promise<{ success: boolean } | undefined> {\n    const configParamName = process.env.CONFIG_PARAM;\n\n    if (!configParamName) {\n      console.error(`Missing required config parameter.`);\n      return;\n    }\n\n    const rawParamValue = await this.ssmClient\n      .getParameter({\n        Name: configParamName,\n      })\n      .promise();\n\n    if (!rawParamValue.Parameter?.Value) {\n      console.error(\n        `Could not resolve parameter \"${configParamName}\" from store.`\n      );\n      return;\n    }\n\n    const slackConfig = JSON.parse(\n      rawParamValue.Parameter.Value\n    ) as ISlackConfigParam;\n\n    const { authToken, channelName, channelTypes } = slackConfig;\n    let { channelId } = slackConfig;\n\n    if (!authToken) {\n      console.error(\n        `Auth Token is required for sending notifications to slack, refer to https://api.slack.com/bot-users`\n      );\n      return;\n    }\n\n    const slackService = new SlackService(authToken);\n    if (!channelId) {\n      // if no channel id is provided, find one and save it back in param store,\n      // so subsequent runs do not need to fetch it from slack api again\n\n      const resolvedChannelId = await slackService.getChannelIdByChannelName(\n        channelName,\n        channelTypes\n      );\n\n      if (!resolvedChannelId) {\n        console.warn(\n          `Could not resolve channel id for channel ${channelId}, message will to first channel matching ${channelName}.`\n        );\n      }\n\n      if (resolvedChannelId) {\n        channelId = resolvedChannelId.id;\n        await this.ssmClient\n          .putParameter({\n            Name: configParamName,\n            Value: JSON.stringify({ ...slackConfig, channelId }),\n            Overwrite: true,\n          })\n          .promise();\n      }\n    }\n\n    const {\n      Message,\n      Subject,\n      UnsubscribeUrl,\n      Timestamp,\n      MessageId,\n      TopicArn,\n    } = this.getParsedEvent(event);\n    const subject =\n      !Subject || Subject === 'null' ? 'New Notification' : Subject;\n\n    const defaultMessageTemplate = new SlackBlocksBuilder(\n      channelName\n    ).getDefaultTemplate({\n      subject,\n      message: Message,\n      messageId: MessageId,\n      timestamp: Timestamp,\n      topicArn: TopicArn,\n      unsubscribeUrl: UnsubscribeUrl,\n    });\n\n    const postMessageResponse = await slackService.webClient.chat.postMessage({\n      token: authToken,\n      channel: channelId ?? channelName,\n      text: subject,\n      blocks: defaultMessageTemplate,\n    });\n\n    if (!postMessageResponse.ok) {\n      console.error(\n        'Could Not post notification to slack',\n        'Please request permissions for scope \"chat:write:bot\", and make sure bot is in the channel.'\n      );\n      return this.bail(postMessageResponse.error);\n    }\n\n    return { success: true };\n  }\n}\n"]}