Initial commit

.dockerignore

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+node_modules/
+*.log
+*.db

.eslintrc.json

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+{
+  "env": {
+    "es2021": true,
+    "node": true
+  },
+  "extends": "eslint:recommended",
+  "parserOptions": {
+    "ecmaVersion": 12
+  },
+  "rules": {
+    "no-unused-vars": "warn"
+  }
+}

.gitignore

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+node_modules/
+
+logs
+*.log
+npm-debug.log*
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# dotenv environment variables file
+.env*
+
+# databases
+*.db
+
+dist/

Dockerfile

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+# stage: dev
+FROM node:15-alpine as dev
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci
+COPY . .
+
+# stage: build
+FROM dev as build
+RUN npm prune --production
+
+# stage: production
+FROM node:15-alpine as production
+WORKDIR /app
+
+RUN printf "%b" '#!'"/bin/sh\n\
+set -e\n\
+if [ ! -z \"\$RUN_MIGRATIONS\" ]; then\n\
+    echo \"Running migrations.\"\n\
+    npm run knex:migrate:latest\n\
+fi\n\
+exec \"\$@\"\n" > docker-entrypoint.sh && chmod +x docker-entrypoint.sh
+
+COPY --from=build /app/node_modules ./node_modules
+COPY --from=build /app/src ./src
+COPY --from=build /app/*.json ./
+COPY --from=build /app/*.ts ./
+
+ENTRYPOINT [ "./docker-entrypoint.sh" ]
+CMD [ "npm", "start" ]

knexfile.ts

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+import config from "./src/db";
+export default config;

package.json

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+{
+  "name": "voicemail-ticketizer",
+  "version": "1.0.0",
+  "description": "Creates Sonar support tickets from RingCentral voicemails",
+  "main": "src/index.ts",
+  "scripts": {
+    "start": "node -r dotenv/config -r ts-node/register/transpile-only src/index.ts",
+    "watch": "nodemon",
+    "knex:migrate:status": "knex --knexfile knexfile.ts migrate:status",
+    "knex:migrate:up": "knex --knexfile knexfile.ts migrate:up",
+    "knex:migrate:down": "knex --knexfile knexfile.ts migrate:down",
+    "knex:migrate:latest": "knex --knexfile knexfile.ts migrate:latest",
+    "knex:migrate:rollback": "knex --knexfile knexfile.ts migrate:rollback"
+  },
+  "author": "Matt Low <matt@mlow.ca>",
+  "license": "ISC",
+  "dependencies": {
+    "@ringcentral/sdk": "^4.4.1",
+    "awesome-phonenumber": "^2.47.0",
+    "dotenv": "^8.2.0",
+    "knex": "^0.95.1",
+    "luxon": "^1.26.0",
+    "node-fetch": "^1.6.3",
+    "pg": "^8.5.1",
+    "react": "^17.0.1",
+    "react-dom": "^17.0.1",
+    "sqlite3": "^5.0.2",
+    "ts-node": "^9.1.1"
+  },
+  "devDependencies": {
+    "@types/luxon": "^1.26.2",
+    "@types/node-fetch": "^2.5.8",
+    "@types/react-dom": "^17.0.2",
+    "eslint": "^7.21.0",
+    "nodemon": "^2.0.7"
+  },
+  "nodemonConfig": {
+    "watch": [
+      "src"
+    ],
+    "exec": "npm start",
+    "ext": "ts"
+  }
+}

src/db/index.ts

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+export default {
+  client: process.env.DB_ENGINE || "sqlite",
+  connection: (function () {
+    const engine = process.env.DB_ENGINE;
+    if (!engine || engine === "sqlite") {
+      return process.env.DB_FILE || "voicemails.db";
+    }
+    if (engine === "pg") {
+      if (!process.env.DB_URL) {
+        throw new Error(`When DB_ENGINE=pg, DB_URL must be set.`);
+      }
+      return process.env.DB_URL;
+    }
+    throw new Error(
+      `Unsupported DB_ENGINE: ${engine}. Supported: sqlite (default), pg`
+    );
+  })(),
+  useNullAsDefault: true,
+  migrations: {
+    directory: "src/db/migrations",
+  },
+};

src/db/migrations/20210308232030_create_voicemails_table.ts

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+import { Knex } from "knex";
+
+export async function up(knex: Knex) {
+  await knex.schema.createTable("voicemails", (table) => {
+    table.bigInteger("messageId").primary().notNullable();
+    table.bigInteger("extensionId").notNullable();
+    table.dateTime("received").notNullable();
+    table.string("toNumber", 32).notNullable();
+    table.string("extensionNumber", 16).notNullable();
+    table.string("extensionName", 64).notNullable();
+    table.string("fromNumber", 32).notNullable();
+    table.string("fromName", 64).notNullable();
+    table.integer("duration").notNullable();
+    table.string("transcriptionStatus", 32).notNullable();
+    table.text("transcription");
+    table.integer("ticketId");
+    table.integer("contactId");
+    table.string("contactableType", 32);
+    table.integer("contactableId");
+  });
+}
+
+export async function down(knex: Knex) {
+  await knex.schema.dropTableIfExists("voicemails");
+}

src/index.ts

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+import knex from "knex";
+import knexConfig from "./db";
+import { Sonar, gql } from "./sonar";
+import { SDK } from "@ringcentral/sdk";
+import { ticketize } from "./ticketize";
+
+function checkEnv() {
+  [
+    "SONAR_URL",
+    "SONAR_TOKEN",
+    "RC_APP_KEY",
+    "RC_APP_SECRET",
+    "RC_LOGIN_USERNAME",
+    "RC_LOGIN_EXT",
+    "RC_LOGIN_PASSWORD",
+    "EXTENSION_TICKET_GROUPS",
+  ].forEach((env) => {
+    if (process.env[env] === undefined) {
+      throw new Error(`${env} environment variable is not set.`);
+    }
+  });
+}
+
+function getExtensionToTicketGroupMapping() {
+  const mapping: { [key: string]: number } = {};
+  process.env.EXTENSION_TICKET_GROUPS!.split(",").forEach((entry) => {
+    const [extension, ticketGroupId] = entry.split(":");
+    mapping[extension] = parseInt(ticketGroupId);
+  });
+  return mapping;
+}
+
+async function initSonar() {
+  const sonar = new Sonar(process.env.SONAR_URL!, process.env.SONAR_TOKEN!);
+  // simple query to test API cedentials
+  const user = await sonar.request(
+    gql`
+      {
+        me {
+          name
+        }
+      }
+    `
+  );
+  console.log(`Authenticated to Sonar as '${user.me.name}'.`);
+  return sonar;
+}
+
+async function initRingCentralSDK() {
+  const sdk = new SDK({
+    server: SDK.server[process.env.RC_SANDBOX ? "sandbox" : "production"],
+    clientId: process.env.RC_APP_KEY,
+    clientSecret: process.env.RC_APP_SECRET,
+  });
+  await sdk.login({
+    username: process.env.RC_LOGIN_USERNAME,
+    extension: process.env.RC_LOGIN_EXT,
+    password: process.env.RC_LOGIN_PASSWORD,
+  });
+  console.log("Authenticated to RingCentral.");
+  return sdk;
+}
+
+async function initDB() {
+  const db = knex(knexConfig);
+  if (!process.env.DB_SKIP_MIGRATIONS) {
+    await db.migrate.latest();
+    console.log("Database migrations run successfully.");
+  }
+  return db;
+}
+
+async function main() {
+  try {
+    checkEnv();
+
+    const sonar = await initSonar();
+    const rcsdk = await initRingCentralSDK();
+    const db = await initDB();
+
+    console.log("Starting ticketizer...");
+    const intervals = ticketize(sonar, rcsdk, db, {
+      extensionToTicketGroup: getExtensionToTicketGroupMapping(),
+    });
+
+    ["SIGINT", "SIGTERM", "SIGQUIT"].forEach((sig) => {
+      process.on(sig, async () => {
+        console.log(`\nCaught ${sig}, shutting down...`);
+        const results = await Promise.allSettled(
+          intervals.map((interval) => interval.clear())
+        );
+        let errors = false;
+        results.forEach((result) => {
+          if (result.status === "rejected") {
+            errors = true;
+            console.error(result.reason);
+          }
+        });
+        console.log("exiting now");
+        process.exit(errors ? 1 : 0);
+      });
+    });
+  } catch (err) {
+    console.error(err);
+  }
+}
+
+main();

src/sonar.ts

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+import fetch from "node-fetch";
+
+// simply to allow for gql tag syntax highlighting
+export function gql(strings: TemplateStringsArray) {
+  return strings.join("");
+}
+
+export class Sonar {
+  url: string;
+  token: string;
+
+  constructor(url: string, token: string) {
+    this.url = url;
+    this.token = token;
+  }
+
+  async request(query: string, variables: any = {}) {
+    const resp = await fetch(this.url, {
+      method: "POST",
+      body: JSON.stringify({ query, variables }),
+      headers: {
+        "Content-Type": "application/json",
+        Authorization: "Bearer " + this.token,
+      },
+    });
+    if (!resp.ok) {
+      throw new Error(
+        `${resp.status} ${resp.statusText} ${JSON.stringify(await resp.json())}`
+      );
+    }
+    const { data, errors } = await resp.json();
+    if (errors) {
+      throw new Error(errors[0].message);
+    }
+    return data;
+  }
+
+  async handlePagination(
+    query: string,
+    key: string,
+    callback: (entities: any) => void | Promise<void>
+  ) {
+    let page = 1;
+    let morePages = false;
+
+    do {
+      const response = await this.request(query, { page });
+      const { entities, page_info } = response[key];
+      morePages = page_info.total_pages > page;
+
+      await callback(entities);
+
+      page++;
+    } while (morePages);
+  }
+}

src/template.tsx

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+import React from "react";
+import ReactDOMServer from "react-dom/server";
+import type { Contact, StoredVoicemail } from "./types";
+import { getNationalNumber, formatSeconds } from "./util";
+import { DateTime } from "luxon";
+
+export function getTicketSubject(
+  voicemail: StoredVoicemail,
+  contact?: Contact
+) {
+  return `New Voicemail From ${getNationalNumber(voicemail.fromNumber)} (${
+    contact ? contact.name : voicemail.fromName
+  })`;
+}
+
+export function getTicketBody(vm: StoredVoicemail, contact?: Contact) {
+  return ReactDOMServer.renderToStaticMarkup(
+    <div>
+      <div>
+        <b>Received:</b>{" "}
+        {DateTime.fromISO(vm.received).toLocaleString(DateTime.DATETIME_MED)}
+      </div>
+      <div>
+        <b>From:</b> {getNationalNumber(vm.fromNumber)} (
+        {contact?.name ?? vm.fromName})
+      </div>
+      <div>
+        <b>To:</b> {getNationalNumber(vm.toNumber)}x{vm.extensionNumber} (
+        {vm.extensionName})
+      </div>
+      <div>
+        <b>Duration: </b> {formatSeconds(vm.duration)}
+      </div>
+      <br />
+      <div>
+        <strong>Transcription: </strong>
+        <p>
+          <i>
+            {vm.transcription
+              ? `"${vm.transcription}"`
+              : vm.transcriptionStatus}
+          </i>
+        </p>
+      </div>
+    </div>
+  );
+}

src/ticketize.ts

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+import SDK from "@ringcentral/sdk";
+import path from "path";
+import { Knex } from "knex";
+import { getNationalNumber, setAsyncInterval } from "./util";
+import { getTicketSubject, getTicketBody } from "./template";
+import { Sonar, gql } from "./sonar";
+import type {
+  Contact,
+  RCExtension,
+  RCMessage,
+  RCAudioAttachment,
+  Recording,
+  Transcription,
+  StoredVoicemail,
+} from "./types";
+
+const SEARCH_CONTACT_BY_PHONE_NUMBER_QUERY = gql`
+  query getContactByPhoneNumber($phoneNumber: String!) {
+    numbers: phone_numbers(general_search: $phoneNumber) {
+      entities {
+        contact {
+          id
+          name
+          contactable {
+            id
+            __typename
+          }
+        }
+      }
+    }
+  }
+`;
+
+const CREATE_TICKET_QUERY = gql`
+  mutation createTicket($input: CreateInternalTicketMutationInput!) {
+    ticket: createInternalTicket(input: $input) {
+      id
+    }
+  }
+`;
+
+/**
+ * @param short  a path omitting the /restapi and version prefix
+ * @param version the API version to target, default: v1.0
+ * @returns the full path to give to the RingCentral SDK
+ */
+function rcapi(short: string, version = "v1.0") {
+  return path.posix.normalize(`/restapi/${version}/${short}`);
+}
+
+interface TicketizeConfig {
+  extensionToTicketGroup: { [key: string]: number };
+}
+
+/**
+ *
+ * @param {Sonar} sonar
+ * @param {SDK} rcsdk
+ * @param {Knex} db
+ */
+export function ticketize(
+  sonar: Sonar,
+  rcsdk: SDK,
+  db: Knex,
+  { extensionToTicketGroup }: TicketizeConfig
+) {
+  /**
+   * Uploads a file to Sonar, returning its ID.
+   * @param data
+   * @param fileName
+   */
+  async function uploadFile(
+    data: ArrayBuffer,
+    fileName: string
+  ): Promise<number> {
+    throw new Error("File uploading not yes implemented.");
+  }
+
+  /**
+   * Returns all valid extensions (not disaled and included in
+   * extensionToTicketGroup).
+   */
+  async function getValidRCExtensions() {
+    const result = await rcsdk.get(rcapi("/account/~/extension"));
+    const { records } = (await result.json()) as { records: RCExtension[] };
+    return records.filter(
+      ({ extensionNumber, status, hidden }) =>
+        status === "Enabled" &&
+        !hidden &&
+        extensionToTicketGroup[extensionNumber] !== undefined
+    );
+  }
+
+  /**
+   * Returns `extensionId`s messages that are up to `from` seconds old.
+   *
+   * @param extensionId
+   * @param from how many seconds ago to retrieve messages from
+   */
+  async function getExtensionVoicemails(extensionId: number, from = 86000) {
+    const result = await rcsdk.get(
+      rcapi(`/account/~/extension/${extensionId}/message-store`),
+      {
+        messageType: "VoiceMail",
+        dateFrom: new Date(Date.now() - from * 1000).toISOString(),
+      }
+    );
+    return (await result.json()).records as RCMessage[];
+  }
+
+  /**
+   * Return a specific messages, mainly for later retrieval of attachments
+   *
+   * @param extensionId
+   * @param messageId
+   */
+  async function getExtensionVoicemail(extensionId: number, messageId: number) {
+    const result = await rcsdk.get(
+      rcapi(`/account/~/extension/${extensionId}/message-store/${messageId}`)
+    );
+    return result.json() as Promise<RCMessage>;
+  }
+
+  /**
+   * Attempts to download the transcription of a voicemail
+   * @param message
+   */
+  async function getVoicemailTranscription(
+    message: RCMessage
+  ): Promise<Transcription> {
+    const status = message.vmTranscriptionStatus;
+    if (status !== "Completed" && status !== "CompletedPartially") {
+      return {
+        status,
+        text: null,
+      };
+    }
+
+    const transcription = message.attachments.find(
+      (attachment) => attachment.type === "AudioTranscription"
+    );
+    if (!transcription) {
+      throw new Error(
+        `Transcription status is ${status} but no AudioTranscription attachment found on ${message.id}`
+      );
+    }
+
+    const response = await rcsdk.get(transcription.uri);
+    return {
+      status,
+      text: (await response.text()).trim(),
+    };
+  }
+
+  /**
+   * Attempts to download the recording of a voicemail
+   * @param message
+   */
+  async function getVoicemailRecording(message: RCMessage): Promise<Recording> {
+    const audio = message.attachments.find(
+      (attachment) => attachment.type === "AudioRecording"
+    ) as RCAudioAttachment;
+    if (!audio) {
+      throw new Error(
+        `No AudioRecording attachment found on message ${message.id}`
+      );
+    }
+    const response = await rcsdk.get(audio.uri);
+    const result = {
+      duration: audio.vmDuration,
+      mimetype: audio.contentType,
+      audio: await response.blob(),
+    };
+    return result;
+  }
+
+  /**
+   * Retrieve the first contact found associated with a phone number
+   * @param phoneNumber the phone number to search with
+   */
+  async function searchContactByPhoneNumber(phoneNumber: string) {
+    const result = await sonar.request(SEARCH_CONTACT_BY_PHONE_NUMBER_QUERY, {
+      phoneNumber: getNationalNumber(phoneNumber),
+    });
+    if (result.numbers.entities.length === 0) {
+      return undefined;
+    }
+    return result.numbers.entities[0].contact as Contact;
+  }
+
+  /**
+   * Creates a ticket out of a stored voicemail
+   * @param voicemail
+   * @param contact
+   */
+  async function createTicket(voicemail: StoredVoicemail, contact?: Contact) {
+    const input: any = {
+      subject: getTicketSubject(voicemail, contact),
+      description: getTicketBody(voicemail, contact),
+      status: "OPEN",
+      priority: "MEDIUM",
+      ticket_group_id: extensionToTicketGroup[voicemail.extensionNumber],
+    };
+
+    const ticket_group_id = extensionToTicketGroup[voicemail.extensionNumber];
+    if (ticket_group_id) {
+      input.ticket_group_id = ticket_group_id;
+    }
+
+    if (contact) {
+      input.ticketable_type = contact.contactable.__typename;
+      input.ticketable_id = contact.contactable.id;
+    }
+
+    const result = await sonar.request(CREATE_TICKET_QUERY, { input });
+    return parseInt(result.ticket.id);
+  }
+
+  /**
+   * Saves a voicemail to the database
+   * @param extension
+   * @param message
+   * @param recording
+   * @param transcription
+   */
+  async function storeVoicemail(
+    extension: RCExtension,
+    message: RCMessage,
+    recording: Recording,
+    transcription: Transcription
+  ) {
+    return db<StoredVoicemail>("voicemails").insert({
+      messageId: message.id,
+      extensionId: message.extensionId,
+      received: message.creationTime,
+      toNumber: message.to[0].phoneNumber,
+      extensionNumber: extension.extensionNumber,
+      extensionName: extension.name,
+      fromNumber: message.from.phoneNumber,
+      fromName: message.from.name,
+      duration: recording.duration,
+      transcriptionStatus: transcription.status,
+      transcription: transcription.text,
+    });
+  }
+
+  /**
+   * Updates a stored voicemail using its current properties
+   * @param voicemail the voicemail to update
+   */
+  async function updateStoredVoicemail(voicemail: StoredVoicemail) {
+    await db<StoredVoicemail>("voicemails")
+      .update({ ...voicemail })
+      .where({ messageId: voicemail.messageId });
+  }
+
+  /**
+   * @param messageId
+   * @returns whether the message by the given ID has been stored
+   */
+  async function isMessageStored(messageId: number) {
+    const result = await db<StoredVoicemail>("voicemails")
+      .where({ messageId })
+      .first();
+    return result !== undefined;
+  }
+
+  /**
+   * @returns stored voicemails that haven't had tickets created for them yet
+   */
+  async function getUnprocessedVoicemails() {
+    return await db<StoredVoicemail>("voicemails")
+      .whereNull("ticketId")
+      .whereIn("transcriptionStatus", [
+        "Completed",
+        "CompletedPartially",
+        "Failed",
+        "NotAvailable",
+      ]);
+  }
+
+  /**
+   * @returns stored voicemails whose trranscriptions may still be in progress
+   */
+  async function getMissingTranscriptionVoicemails() {
+    return await db<StoredVoicemail>("voicemails")
+      .whereNotNull("transcription")
+      .whereNotIn("transcriptionStatus", [
+        // Don't include those whose transcriptions have failed or will not
+        // be completed.
+        "Failed",
+        "NotAvailable",
+      ]);
+  }
+
+  /**
+   * Retrieves and stores the voicemails for `extension` that are up to `from`
+   * seconds old.
+   * @param extension
+   * @param from
+   */
+  async function storeExtensionVoicemails(
+    extension: RCExtension,
+    from: number
+  ) {
+    const messages = await getExtensionVoicemails(extension.id, from);
+    const isStored = await Promise.all(
+      messages.map((message) => isMessageStored(message.id))
+    );
+    return Promise.all(
+      messages
+        .filter((_, i) => !isStored[i])
+        .map(async (message) => {
+          console.log("Saving voicemail", message.id);
+          return storeVoicemail(
+            extension,
+            message,
+            await getVoicemailRecording(message),
+            await getVoicemailTranscription(message)
+          );
+        })
+    );
+  }
+
+  /**
+   * Fetch and store new voicemails. If this is the first run, we get the last
+   * day's worth of voicemails. Otherwise, we fetch only the last 15 minutes.
+   *
+   * @param firstRun whether this is the first run or not
+   */
+  async function fetchAndStoreNewVoicemails(firstRun = false) {
+    const extensions = await getValidRCExtensions();
+    return Promise.all(
+      extensions.map((extension) =>
+        storeExtensionVoicemails(extension, firstRun ? 86400 : 900)
+      )
+    );
+  }
+
+  /**
+   * Attempt to retrieve missing/incompleted voicemail transcriptions. If the
+   * messages was received > 5 minutes ago and there is still no transcription,
+   * we give up.
+   */
+  async function fetchMissingTranscriptions() {
+    const messages = await getMissingTranscriptionVoicemails();
+    return Promise.all(
+      messages.map(async (message) => {
+        const transcription = await getVoicemailTranscription(
+          await getExtensionVoicemail(message.extensionId, message.messageId)
+        );
+        if (
+          transcription.status == "Completed" ||
+          transcription.status == "CompletedPartially"
+        ) {
+          // we got the transcription, so update the stored voicemail with it
+          message.transcriptionStatus = transcription.status;
+          message.transcription = transcription.text;
+        } else if (
+          new Date(message.received) < new Date(Date.now() - 300 * 1000)
+        ) {
+          // else if the message is more than 5 minutes old, change status
+          // to NotAvailable and give up
+          message.transcriptionStatus = "NotAvailable";
+        } else {
+          // else we do nothing
+          return;
+        }
+        return updateStoredVoicemail(message);
+      })
+    );
+  }
+
+  /**
+   * Creates tickets from stored voicemails whose transcription has either
+   * failed or been completed, and which haven't already had a ticket created.
+   */
+  async function createTickets() {
+    const voicemails = await getUnprocessedVoicemails();
+    return Promise.all(
+      voicemails.map(async (voicemail) => {
+        const contact = await searchContactByPhoneNumber(voicemail.fromNumber);
+        const ticketId = await createTicket(voicemail, contact);
+        console.log(
+          `Created ticket ${ticketId} from voicemail ${voicemail.messageId}`
+        );
+        return updateStoredVoicemail({
+          ...voicemail,
+          ticketId,
+          contactId: contact?.id,
+          contactableType: contact?.contactable.__typename,
+          contactableId: contact?.contactable.id,
+        });
+      })
+    );
+  }
+
+  function catchHandler(reason: any) {
+    console.error(reason);
+  }
+
+  let firstRun = true;
+  return [
+    setAsyncInterval(
+      () => {
+        const promise = fetchAndStoreNewVoicemails(firstRun);
+        firstRun = false;
+        return promise.catch(catchHandler);
+      },
+      60 * 1000,
+      true // immediate
+    ),
+    setAsyncInterval(
+      () => fetchMissingTranscriptions().catch(catchHandler),
+      60 * 1000,
+      true
+    ),
+    setAsyncInterval(
+      () => createTickets().catch(catchHandler),
+      60 * 1000,
+      true
+    ),
+  ];
+}

src/types.ts

@@ -0,0 +1,126 @@
+export type Contact = {
+  id: number;
+  name: string;
+  contactable: {
+    id: number;
+    __typename: string;
+  };
+};
+
+export type RCExtension = {
+  id: number;
+  uri: string;
+  extensionNumber: string;
+  name: string;
+  type:
+    | "User"
+    | "FaxUser"
+    | "VirtualUser"
+    | "DigitalUser"
+    | "Department"
+    | "Announcement"
+    | "Voicemail"
+    | "SharedLinesGroup"
+    | "PagingOnly"
+    | "IvrMenu"
+    | "ApplicationExtension"
+    | "ParkLocation"
+    | "Bot"
+    | "Room"
+    | "Limited"
+    | "Site"
+    | "ProxyAdmin"
+    | "DelegatedLinesGroup"
+    | "GroupCallPickup";
+  hidden: boolean;
+  status: "Enabled" | "Disabled" | "Frozen" | "NotActivated" | "Unassigned";
+};
+
+export type Recipient = {
+  extensionId?: number;
+  extensionNumber?: string;
+  location: string;
+  name: string;
+  phoneNumber: string;
+};
+
+export type Sender = Recipient & {
+  extensionId: number;
+  extensionNumber: string;
+};
+
+type BaseAttachment = {
+  id: string;
+  uri: string;
+  contentType: string;
+  fileName: string;
+  size: number;
+};
+
+export type RCAudioAttachment = BaseAttachment & {
+  type: "AudioRecording";
+  vmDuration: number;
+};
+
+export type RCAttachment =
+  | (BaseAttachment & {
+      type:
+        | "AudioTranscription"
+        | "Text"
+        | "SourceDocument"
+        | "RenderedDocument"
+        | "MmsAttachment";
+    })
+  | RCAudioAttachment;
+
+type TranscriptionStatus =
+  | "NotAvailable"
+  | "InProgress"
+  | "TimedOut"
+  | "Completed"
+  | "CompletedPartially"
+  | "Failed"
+  | "Unknown";
+
+export interface RCMessage {
+  id: number;
+  uri: string;
+  extensionId: number;
+  availability: "Alive" | "Deleted" | "Purged";
+  creationTime: string;
+  from: Sender;
+  to: Recipient[];
+  type: "Fax" | "SMS" | "VoiceMail" | "Pager" | "Text";
+  vmTranscriptionStatus: TranscriptionStatus;
+  attachments: RCAttachment[];
+}
+
+export interface Recording {
+  duration: number;
+  mimetype: string;
+  audio: Blob;
+}
+
+export interface Transcription {
+  status: TranscriptionStatus;
+  text: string | null;
+}
+
+export interface StoredVoicemail {
+  messageId: number;
+  extensionId: number;
+  processed: boolean;
+  received: string;
+  toNumber: string;
+  extensionNumber: string;
+  extensionName: string;
+  fromNumber: string;
+  fromName?: string;
+  duration: number;
+  transcriptionStatus: TranscriptionStatus;
+  transcription: string | null;
+  ticketId?: number;
+  contactId?: number;
+  contactableType?: string;
+  contactableId?: number;
+}

src/util.ts

@@ -0,0 +1,73 @@
+import PhoneNumber from "awesome-phonenumber";
+
+export function getNationalNumber(input: string) {
+  const number = new PhoneNumber(input);
+  if (!number.isValid()) {
+    throw new Error(`Invalid number: ${input}`);
+  }
+  return number.getNumber("national");
+}
+
+export function formatSeconds(input: number) {
+  const minutes = String(Math.trunc(input / 60)).padStart(2, "0");
+  const seconds = String(input % 60).padStart(2, "0");
+  return `${minutes}:${seconds}`;
+}
+
+type AsyncInterval = {
+  promise?: Promise<any>;
+  timeout?: NodeJS.Timeout;
+  stop: boolean;
+  clear(): Promise<any> | undefined;
+};
+
+/**
+ * Similar to setInterval, except the next execution of `cb` will not happen
+ * until `interval` ms after the Promise returned by `cb` has settled.
+ *
+ * @param cb a callback which returns a Promise
+ * @param interval ms delay between executions of cb
+ * @param immediate whether to do an immediate execution of cb (don't first
+ *                  wait for interval)
+ *
+ * @returns an AsyncInterval object which tracks the state of the interval,
+ *          and provides a clear() method to clear it similar to clearInterval
+ */
+export function setAsyncInterval(
+  cb: () => Promise<any>,
+  interval: number,
+  immediate = false
+) {
+  const asyncInterval: AsyncInterval = {
+    stop: false,
+    clear() {
+      this.stop = true;
+      if (this.timeout) {
+        clearTimeout(this.timeout);
+        this.timeout = undefined;
+      }
+      return this.promise;
+    },
+  };
+
+  function refreshTimeout() {
+    if (!asyncInterval.stop) {
+      asyncInterval.timeout = setTimeout(run, interval);
+    }
+  }
+
+  function run() {
+    const promise = cb();
+    asyncInterval.promise = promise;
+    promise.finally(refreshTimeout);
+    return promise;
+  }
+
+  if (immediate) {
+    asyncInterval.promise = cb().finally(refreshTimeout);
+  } else {
+    refreshTimeout();
+  }
+
+  return asyncInterval;
+}

tsconfig.json

@@ -0,0 +1,72 @@
+{
+  "compilerOptions": {
+    /* Visit https://aka.ms/tsconfig.json to read more about this file */
+
+    /* Basic Options */
+    // "incremental": true,                         /* Enable incremental compilation */
+    "target": "es2020" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */,
+    "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,
+    // "lib": [],                                   /* Specify library files to be included in the compilation. */
+    // "allowJs": true,                             /* Allow javascript files to be compiled. */
+    // "checkJs": true,                             /* Report errors in .js files. */
+    "jsx": "react" /* Specify JSX code generation: 'preserve', 'react-native', 'react', 'react-jsx' or 'react-jsxdev'. */,
+    // "declaration": true,                         /* Generates corresponding '.d.ts' file. */
+    // "declarationMap": true,                      /* Generates a sourcemap for each corresponding '.d.ts' file. */
+    // "sourceMap": true,                           /* Generates corresponding '.map' file. */
+    // "outFile": "./",                             /* Concatenate and emit output to single file. */
+    // "outDir": "./dist" /* Redirect output structure to the directory. */,
+    // "rootDir": "./",                             /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    // "composite": true,                           /* Enable project compilation */
+    // "tsBuildInfoFile": "./",                     /* Specify file to store incremental compilation information */
+    // "removeComments": true,                      /* Do not emit comments to output. */
+    // "noEmit": true,                              /* Do not emit outputs. */
+    // "importHelpers": true,                       /* Import emit helpers from 'tslib'. */
+    // "downlevelIteration": true,                  /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
+    // "isolatedModules": true,                     /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+
+    /* Strict Type-Checking Options */
+    "strict": true /* Enable all strict type-checking options. */,
+    // "noImplicitAny": true,                       /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,                    /* Enable strict null checks. */
+    // "strictFunctionTypes": true,                 /* Enable strict checking of function types. */
+    // "strictBindCallApply": true,                 /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // "strictPropertyInitialization": true,        /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                      /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                        /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                      /* Report errors on unused locals. */
+    // "noUnusedParameters": true,                  /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,                   /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,          /* Report errors for fallthrough cases in switch statement. */
+    // "noUncheckedIndexedAccess": true,            /* Include 'undefined' in index signature results */
+    // "noPropertyAccessFromIndexSignature": true,  /* Require undeclared properties from index signatures to use element accesses. */
+
+    /* Module Resolution Options */
+    "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
+    // "baseUrl": "./",                             /* Base directory to resolve non-absolute module names. */
+    // "paths": {},                                 /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
+    // "rootDirs": [],                              /* List of root folders whose combined content represents the structure of the project at runtime. */
+    // "typeRoots": [],                             /* List of folders to include type definitions from. */
+    // "types": [],                                 /* Type declaration files to be included in compilation. */
+    // "allowSyntheticDefaultImports": true,        /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
+    // "preserveSymlinks": true,                    /* Do not resolve the real path of symlinks. */
+    // "allowUmdGlobalAccess": true,                /* Allow accessing UMD globals from modules. */
+
+    /* Source Map Options */
+    // "sourceRoot": "",                            /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                               /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,                     /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                       /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    // "experimentalDecorators": true,              /* Enables experimental support for ES7 decorators. */
+    // "emitDecoratorMetadata": true,               /* Enables experimental support for emitting type metadata for decorators. */
+
+    /* Advanced Options */
+    "skipLibCheck": true /* Skip type checking of declaration files. */,
+    "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
+  },
+  "include": ["./src"]
+}