feat: initial prototype (#1)

### Explanation

_No response_

### Issue

_No response_

### Attestations

- [x] I have read and agree to the [Code of Conduct](https://docs.nhcarrigan.com/community/coc/)
- [x] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
- [x] My contribution complies with the [Contributor Covenant](https://docs.nhcarrigan.com/dev/covenant/).

### Dependencies

- [x] I have pinned the dependencies to a specific patch version.

### Style

- [x] I have run the linter and resolved any errors.
- [x] My pull request uses an appropriate title, matching the conventional commit standards.
- [x] My scope of feat/fix/chore/etc. correctly matches the nature of changes in my pull request.

### Tests

- [ ] My contribution adds new code, and I have added tests to cover it.
- [ ] My contribution modifies existing code, and I have updated the tests to reflect these changes.
- [ ] All new and existing tests pass locally with my changes.
- [ ] Code coverage remains at or above the configured threshold.

### Documentation

_No response_

### Versioning

Major - My pull request introduces a breaking change.

Reviewed-on: #1
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src/commands/about.ts

@@ -0,0 +1,24 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import {
+  ApplicationIntegrationType,
+  SlashCommandBuilder,
+  InteractionContextType,
+} from "discord.js";
+
+const command = new SlashCommandBuilder().
+  setContexts(
+    InteractionContextType.BotDM,
+    InteractionContextType.Guild,
+    InteractionContextType.PrivateChannel,
+  ).
+  setIntegrationTypes(ApplicationIntegrationType.UserInstall).
+  setName("about").
+  setDescription("Learn more about this bot!");
+
+// eslint-disable-next-line no-console -- We don't need our logger here as this never runs in production.
+console.log(JSON.stringify(command.toJSON()));

src/commands/create.ts

@@ -0,0 +1,69 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import {
+  ApplicationIntegrationType,
+  SlashCommandBuilder,
+  InteractionContextType,
+} from "discord.js";
+import { priorityChoices } from "../config/priorityChoices.js";
+import { statusChoices } from "../config/statusChoices.js";
+
+const command = new SlashCommandBuilder().
+  setContexts(
+    InteractionContextType.BotDM,
+    InteractionContextType.Guild,
+    InteractionContextType.PrivateChannel,
+  ).
+  setIntegrationTypes(ApplicationIntegrationType.UserInstall).
+  setName("create").
+  setDescription("Create a new task").
+  addStringOption((option) => {
+    return option.
+      setName("title").
+      setDescription("The title for your task").
+      setMaxLength(256).
+      setRequired(true);
+  }).
+  addStringOption((option) => {
+    return option.
+      setName("description").
+      setDescription("The description for your task").
+      setMaxLength(2048).
+      setRequired(true);
+  }).
+  addStringOption((option) => {
+    return option.
+      setName("status").
+      setDescription("The status for your task").
+      setChoices(statusChoices).
+      setRequired(true);
+  }).
+  addStringOption((option) => {
+    return option.
+      setName("priority").
+      setDescription("The priority for your task").
+      setChoices(priorityChoices).
+      setRequired(true);
+  }).
+  addStringOption((option) => {
+    return option.
+      setName("category").
+      setDescription("The category for your task").
+      setRequired(true).
+      setMaxLength(1024);
+  }).
+  addStringOption((option) => {
+    return option.
+      setName("due-date").
+      setDescription("The date this task is due in YYYY/MM/DD format").
+      setRequired(false).
+      setMinLength(10).
+      setMaxLength(10);
+  });
+
+// eslint-disable-next-line no-console -- We don't need our logger here as this never runs in production.
+console.log(JSON.stringify(command.toJSON()));

src/commands/list.ts

@@ -0,0 +1,24 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import {
+  ApplicationIntegrationType,
+  SlashCommandBuilder,
+  InteractionContextType,
+} from "discord.js";
+
+const command = new SlashCommandBuilder().
+  setContexts(
+    InteractionContextType.BotDM,
+    InteractionContextType.Guild,
+    InteractionContextType.PrivateChannel,
+  ).
+  setIntegrationTypes(ApplicationIntegrationType.UserInstall).
+  setName("list").
+  setDescription("List your currently active tasks.");
+
+// eslint-disable-next-line no-console -- We don't need our logger here as this never runs in production.
+console.log(JSON.stringify(command.toJSON()));

src/commands/recategorise.ts

@@ -0,0 +1,38 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import {
+  ApplicationIntegrationType,
+  SlashCommandBuilder,
+  InteractionContextType,
+} from "discord.js";
+
+const command = new SlashCommandBuilder().
+  setContexts(
+    InteractionContextType.BotDM,
+    InteractionContextType.Guild,
+    InteractionContextType.PrivateChannel,
+  ).
+  setIntegrationTypes(ApplicationIntegrationType.UserInstall).
+  setName("recategorise").
+  setDescription("Update the category for a task.").
+  addIntegerOption((option) => {
+    return option.
+      setName("number").
+      setDescription("The number of the task you wish to update.").
+      setRequired(true).
+      setMinValue(1);
+  }).
+  addStringOption((option) => {
+    return option.
+      setName("category").
+      setDescription("The new category for your task.").
+      setRequired(true).
+      setMaxLength(1024);
+  });
+
+// eslint-disable-next-line no-console -- We don't need our logger here as this never runs in production.
+console.log(JSON.stringify(command.toJSON()));

src/commands/redescribe.ts

@@ -0,0 +1,38 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import {
+  ApplicationIntegrationType,
+  SlashCommandBuilder,
+  InteractionContextType,
+} from "discord.js";
+
+const command = new SlashCommandBuilder().
+  setContexts(
+    InteractionContextType.BotDM,
+    InteractionContextType.Guild,
+    InteractionContextType.PrivateChannel,
+  ).
+  setIntegrationTypes(ApplicationIntegrationType.UserInstall).
+  setName("redescribe").
+  setDescription("Update the description for a task.").
+  addIntegerOption((option) => {
+    return option.
+      setName("number").
+      setDescription("The number of the task you wish to update.").
+      setRequired(true).
+      setMinValue(1);
+  }).
+  addStringOption((option) => {
+    return option.
+      setName("description").
+      setDescription("The new description for your task").
+      setMaxLength(2048).
+      setRequired(true);
+  });
+
+// eslint-disable-next-line no-console -- We don't need our logger here as this never runs in production.
+console.log(JSON.stringify(command.toJSON()));

src/commands/reprioritise.ts

@@ -0,0 +1,39 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import {
+  ApplicationIntegrationType,
+  SlashCommandBuilder,
+  InteractionContextType,
+} from "discord.js";
+import { priorityChoices } from "../config/priorityChoices.js";
+
+const command = new SlashCommandBuilder().
+  setContexts(
+    InteractionContextType.BotDM,
+    InteractionContextType.Guild,
+    InteractionContextType.PrivateChannel,
+  ).
+  setIntegrationTypes(ApplicationIntegrationType.UserInstall).
+  setName("reprioritise").
+  setDescription("Update the priority for a task.").
+  addIntegerOption((option) => {
+    return option.
+      setName("number").
+      setDescription("The number of the task you wish to update.").
+      setRequired(true).
+      setMinValue(1);
+  }).
+  addStringOption((option) => {
+    return option.
+      setName("priority").
+      setDescription("The priority for your task").
+      setChoices(priorityChoices).
+      setRequired(true);
+  });
+
+// eslint-disable-next-line no-console -- We don't need our logger here as this never runs in production.
+console.log(JSON.stringify(command.toJSON()));

src/commands/restate.ts

@@ -0,0 +1,39 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import {
+  ApplicationIntegrationType,
+  SlashCommandBuilder,
+  InteractionContextType,
+} from "discord.js";
+import { statusChoices } from "../config/statusChoices.js";
+
+const command = new SlashCommandBuilder().
+  setContexts(
+    InteractionContextType.BotDM,
+    InteractionContextType.Guild,
+    InteractionContextType.PrivateChannel,
+  ).
+  setIntegrationTypes(ApplicationIntegrationType.UserInstall).
+  setName("restate").
+  setDescription("Update the status for a task.").
+  addIntegerOption((option) => {
+    return option.
+      setName("number").
+      setDescription("The number of the task you wish to update.").
+      setRequired(true).
+      setMinValue(1);
+  }).
+  addStringOption((option) => {
+    return option.
+      setName("status").
+      setDescription("The status for your task").
+      setChoices(statusChoices).
+      setRequired(true);
+  });
+
+// eslint-disable-next-line no-console -- We don't need our logger here as this never runs in production.
+console.log(JSON.stringify(command.toJSON()));

src/commands/retarget.ts

@@ -0,0 +1,39 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import {
+  ApplicationIntegrationType,
+  SlashCommandBuilder,
+  InteractionContextType,
+} from "discord.js";
+
+const command = new SlashCommandBuilder().
+  setContexts(
+    InteractionContextType.BotDM,
+    InteractionContextType.Guild,
+    InteractionContextType.PrivateChannel,
+  ).
+  setIntegrationTypes(ApplicationIntegrationType.UserInstall).
+  setName("retarget").
+  setDescription("Update the due date for a task.").
+  addIntegerOption((option) => {
+    return option.
+      setName("number").
+      setDescription("The number of the task you wish to update.").
+      setRequired(true).
+      setMinValue(1);
+  }).
+  addStringOption((option) => {
+    return option.
+      setName("due-date").
+      setDescription("The date this task is due in YYYY/MM/DD format").
+      setRequired(false).
+      setMinLength(10).
+      setMaxLength(10);
+  });
+
+// eslint-disable-next-line no-console -- We don't need our logger here as this never runs in production.
+console.log(JSON.stringify(command.toJSON()));

src/commands/retitle.ts

@@ -0,0 +1,38 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import {
+  ApplicationIntegrationType,
+  SlashCommandBuilder,
+  InteractionContextType,
+} from "discord.js";
+
+const command = new SlashCommandBuilder().
+  setContexts(
+    InteractionContextType.BotDM,
+    InteractionContextType.Guild,
+    InteractionContextType.PrivateChannel,
+  ).
+  setIntegrationTypes(ApplicationIntegrationType.UserInstall).
+  setName("retitle").
+  setDescription("Update the title for a task.").
+  addIntegerOption((option) => {
+    return option.
+      setName("number").
+      setDescription("The number of the task you wish to update.").
+      setRequired(true).
+      setMinValue(1);
+  }).
+  addStringOption((option) => {
+    return option.
+      setName("title").
+      setDescription("The new title for your task.").
+      setRequired(true).
+      setMaxLength(256);
+  });
+
+// eslint-disable-next-line no-console -- We don't need our logger here as this never runs in production.
+console.log(JSON.stringify(command.toJSON()));

src/commands/view.ts

@@ -0,0 +1,31 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import {
+  ApplicationIntegrationType,
+  SlashCommandBuilder,
+  InteractionContextType,
+} from "discord.js";
+
+const command = new SlashCommandBuilder().
+  setContexts(
+    InteractionContextType.BotDM,
+    InteractionContextType.Guild,
+    InteractionContextType.PrivateChannel,
+  ).
+  setIntegrationTypes(ApplicationIntegrationType.UserInstall).
+  setName("view").
+  setDescription("View a task").
+  addIntegerOption((option) => {
+    return option.
+      setName("number").
+      setDescription("The number of the task you wish to view.").
+      setRequired(true).
+      setMinValue(1);
+  });
+
+// eslint-disable-next-line no-console -- We don't need our logger here as this never runs in production.
+console.log(JSON.stringify(command.toJSON()));

src/config/priorityChoices.ts

@@ -0,0 +1,17 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import type { Priority } from "../interfaces/priority.js";
+import type { APIApplicationCommandOptionChoice } from "discord.js";
+
+export const priorityChoices: Array<APIApplicationCommandOptionChoice<Priority>>
+  = [
+    { name: "None", value: "none" },
+    { name: "Low", value: "low" },
+    { name: "Medium", value: "medium" },
+    { name: "High", value: "high" },
+    { name: "Critical", value: "critical" },
+  ];

src/config/priorityNames.ts

@@ -0,0 +1,15 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import type { Priority } from "../interfaces/priority.js";
+
+export const priorityNames: Record<Priority, string> = {
+  critical: "Critical",
+  high:     "High",
+  low:      "Low",
+  medium:   "Medium",
+  none:     "None",
+};

src/config/statusChoices.ts

@@ -0,0 +1,16 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import type { Status } from "../interfaces/status.js";
+import type { APIApplicationCommandOptionChoice } from "discord.js";
+
+export const statusChoices: Array<APIApplicationCommandOptionChoice<Status>>
+  = [
+    { name: "TODO", value: "todo" },
+    { name: "In Progress", value: "in-progress" },
+    { name: "In Review", value: "in-review" },
+    { name: "Complete", value: "complete" },
+  ];

src/config/statusNames.ts

@@ -0,0 +1,15 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+/* eslint-disable @typescript-eslint/naming-convention -- These need to follow the requirements for Discord choices. */
+import type { Status } from "../interfaces/status.js";
+
+export const statusNames: Record<Status, string> = {
+  "complete":    "Complete",
+  "in-progress": "In Progress",
+  "in-review":   "In Review",
+  "todo":        "To Do",
+};

src/db/database.ts

@@ -0,0 +1,9 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import { PrismaClient } from "@prisma/client";
+
+export const database = new PrismaClient();

src/index.ts

@@ -0,0 +1,78 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { Client, Events, type ChatInputCommandInteraction } from "discord.js";
+import { database } from "./db/database.js";
+import { about } from "./modules/about.js";
+import { create } from "./modules/create.js";
+import { list } from "./modules/list.js";
+import { recategorise } from "./modules/recategorise.js";
+import { redescribe } from "./modules/redescribe.js";
+import { restate } from "./modules/restate.js";
+import { retarget } from "./modules/retarget.js";
+import { retitle } from "./modules/retitle.js";
+import { view } from "./modules/view.js";
+import { instantiateServer } from "./server/serve.js";
+import { logger } from "./utils/logger.js";
+
+const commands: Record<
+  string,
+  (interaction: ChatInputCommandInteraction)=> Promise<void>
+> = {
+  about,
+  create,
+  list,
+  recategorise,
+  redescribe,
+  restate,
+  retarget,
+  retitle,
+  view,
+};
+
+process.on("unhandledRejection", (error) => {
+  if (error instanceof Error) {
+    void logger.error("Unhandled Rejection", error);
+    return;
+  }
+  void logger.error("unhandled rejection", new Error(String(error)));
+});
+
+process.on("uncaughtException", (error) => {
+  if (error instanceof Error) {
+    void logger.error("Uncaught Exception", error);
+    return;
+  }
+  void logger.error("uncaught exception", new Error(String(error)));
+});
+
+const client = new Client({
+  intents: [],
+});
+
+client.on(Events.InteractionCreate, (interaction) => {
+  if (interaction.isChatInputCommand()) {
+    const handler = commands[interaction.commandName];
+    if (handler) {
+      void handler(interaction);
+    }
+  }
+});
+
+client.on(Events.EntitlementCreate, (entitlement) => {
+  void logger.log("info", `User ${entitlement.userId} has subscribed!`);
+});
+
+client.on(Events.EntitlementDelete, (entitlement) => {
+  void logger.log("info", `User ${entitlement.userId} has unsubscribed... :c`);
+});
+
+client.on(Events.ClientReady, () => {
+  void logger.log("debug", "Bot is ready.");
+});
+
+instantiateServer();
+await client.login(process.env.DISCORD_TOKEN);
+await database.$connect();

src/interfaces/priority.ts

@@ -0,0 +1,7 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+export type Priority = "none" | "low" | "medium" | "high" | "critical";

src/interfaces/status.ts

@@ -0,0 +1,7 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+export type Status = "todo" | "in-progress" | "in-review" | "complete";

src/modules/about.ts

@@ -0,0 +1,78 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import { execSync } from "node:child_process";
+import {
+  ActionRowBuilder,
+  ButtonBuilder,
+  ButtonStyle,
+  EmbedBuilder,
+  MessageFlags,
+  type ChatInputCommandInteraction,
+} from "discord.js";
+import { logger } from "../utils/logger.js";
+import { replyToError } from "../utils/replyToError.js";
+
+/**
+ * Responds with information about the bot.
+ * @param interaction -- The interaction payload from Discord.
+ */
+// eslint-disable-next-line max-lines-per-function -- Refactor at a later time.
+export const about = async(
+  interaction: ChatInputCommandInteraction,
+): Promise<void> => {
+  try {
+    await interaction.deferReply({ flags: [ MessageFlags.Ephemeral ] });
+
+    const version = process.env.npm_package_version ?? "Unknown";
+    const commit = execSync("git rev-parse --short HEAD").toString().
+      trim();
+
+    const embed = new EmbedBuilder();
+    embed.setTitle("About Melody Iuvo");
+    embed.setDescription(
+    // eslint-disable-next-line stylistic/max-len -- It's a long string.
+      "Melody Iuvo is a Discord bot that allows you to track your tasks, deadlines, plans, and other goals. To use the bot, type `/` and select one of her commands!",
+    );
+    embed.addFields(
+      {
+        name:  "Running Version",
+        value: version,
+      },
+      {
+        name:  "Current Commit",
+        value: commit,
+      },
+    );
+
+    const supportButton = new ButtonBuilder().
+      setLabel("Need help?").
+      setStyle(ButtonStyle.Link).
+      setURL("https://chat.nhcarrigan.com");
+    const sourceButton = new ButtonBuilder().
+      setLabel("Source Code").
+      setStyle(ButtonStyle.Link).
+      setURL("https://git.nhcarrigan.com/nhcarrigan/melody-iuvo");
+    const subscribeButton = new ButtonBuilder().
+      setStyle(ButtonStyle.Premium).
+      setSKUId("1338672773261951026");
+    const row = new ActionRowBuilder<ButtonBuilder>().addComponents(
+      supportButton,
+      sourceButton,
+      subscribeButton,
+    );
+
+    await interaction.editReply({
+      components: [ row ],
+      embeds:     [ embed ],
+    });
+  } catch (error) {
+    await replyToError(interaction);
+    if (error instanceof Error) {
+      await logger.error("about command", error);
+    }
+  }
+};

src/modules/create.ts

@@ -0,0 +1,64 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
+import { database } from "../db/database.js";
+import { generateTaskEmbed } from "../utils/generateTaskEmbed.js";
+import { isSubscribed } from "../utils/isSubscribed.js";
+import { logger } from "../utils/logger.js";
+import { replyToError } from "../utils/replyToError.js";
+
+/**
+ * Accepts the necessary properties to create a new task for the
+ * user in the database.
+ * @param interaction -- The interaction payload from Discord.
+ */
+export const create = async(
+  interaction: ChatInputCommandInteraction,
+): Promise<void> => {
+  try {
+    await interaction.deferReply({ flags: [ MessageFlags.Ephemeral ] });
+    const sub = await isSubscribed(interaction);
+    if (!sub) {
+      return;
+    }
+
+    const title = interaction.options.getString("title", true);
+    const description = interaction.options.getString("description", true);
+    const dueDate = interaction.options.getString("due-date", false);
+    const dueAt = new Date(dueDate ?? Date.now());
+    const status = interaction.options.getString("status", true);
+    const category = interaction.options.getString("category", true);
+    const priority = interaction.options.getString("priority", true);
+
+    const currentNumber = await database.tasks.count({
+      where: { userId: interaction.user.id },
+    });
+    const number = currentNumber + 1;
+    const userId = interaction.user.id;
+
+    const task = await database.tasks.create({
+      data: {
+        category,
+        description,
+        dueAt,
+        number,
+        priority,
+        status,
+        title,
+        userId,
+      },
+    });
+    await interaction.editReply({
+      content: `Task #${task.number.toString()} created: ${task.title}`,
+      embeds:  [ generateTaskEmbed(task) ],
+    });
+  } catch (error) {
+    await replyToError(interaction);
+    if (error instanceof Error) {
+      await logger.error("create command", error);
+    }
+  }
+};

src/modules/list.ts

@@ -0,0 +1,59 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
+import { database } from "../db/database.js";
+import { generateTaskEmbed } from "../utils/generateTaskEmbed.js";
+import { isSubscribed } from "../utils/isSubscribed.js";
+import { logger } from "../utils/logger.js";
+import { replyToError } from "../utils/replyToError.js";
+
+/**
+ * Fetches all non-complete tasks for the user and sends them in a list.
+ * @param interaction -- The interaction payload from Discord.
+ */
+export const list = async(
+  interaction: ChatInputCommandInteraction,
+): Promise<void> => {
+  try {
+    await interaction.deferReply({ flags: [ MessageFlags.Ephemeral ] });
+    const sub = await isSubscribed(interaction);
+    if (!sub) {
+      return;
+    }
+
+    const tasks = await database.tasks.findMany({
+      where: {
+        status: {
+          not: "complete",
+        },
+        userId: interaction.user.id,
+      },
+    });
+    if (tasks.length === 0) {
+      await interaction.editReply({
+        content: "You have no upcoming tasks. Great work!",
+      });
+      return;
+    }
+    tasks.sort((a, b) => {
+      return a.dueAt.getTime() - b.dueAt.getTime();
+    });
+
+    const firstTen = tasks.slice(0, 10);
+
+    await interaction.editReply({
+      content: "Here are your top upcoming tasks:",
+      embeds:  firstTen.map((task) => {
+        return generateTaskEmbed(task);
+      }),
+    });
+  } catch (error) {
+    await replyToError(interaction);
+    if (error instanceof Error) {
+      await logger.error("list command", error);
+    }
+  }
+};

src/modules/recategorise.ts

@@ -0,0 +1,68 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
+import { database } from "../db/database.js";
+import { generateTaskEmbed } from "../utils/generateTaskEmbed.js";
+import { isSubscribed } from "../utils/isSubscribed.js";
+import { logger } from "../utils/logger.js";
+import { replyToError } from "../utils/replyToError.js";
+
+/**
+ * Updates the category of a task.
+ * @param interaction -- The interaction payload from Discord.
+ */
+export const recategorise = async(
+  interaction: ChatInputCommandInteraction,
+): Promise<void> => {
+  try {
+    await interaction.deferReply({ flags: [ MessageFlags.Ephemeral ] });
+    const sub = await isSubscribed(interaction);
+    if (!sub) {
+      return;
+    }
+
+    const number = interaction.options.getInteger("number", true);
+    const category = interaction.options.getString("category", true);
+
+    const task = await database.tasks.findUnique({
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    if (task === null) {
+      await interaction.editReply({ content: `You do not have a task with the number ${number.toString()}.` });
+      return;
+    }
+
+    const updated = await database.tasks.update({
+      data: {
+        category,
+      },
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    await interaction.editReply({
+      content: `Recategorised task #${updated.number.toString()}:`,
+      embeds:  [ generateTaskEmbed(updated) ],
+    });
+  } catch (error) {
+    await replyToError(interaction);
+    if (error instanceof Error) {
+      await logger.error("recategorise command", error);
+    }
+  }
+};

src/modules/redescribe.ts

@@ -0,0 +1,68 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
+import { database } from "../db/database.js";
+import { generateTaskEmbed } from "../utils/generateTaskEmbed.js";
+import { isSubscribed } from "../utils/isSubscribed.js";
+import { logger } from "../utils/logger.js";
+import { replyToError } from "../utils/replyToError.js";
+
+/**
+ * Updates the description of a task.
+ * @param interaction -- The interaction payload from Discord.
+ */
+export const redescribe = async(
+  interaction: ChatInputCommandInteraction,
+): Promise<void> => {
+  try {
+    await interaction.deferReply({ flags: [ MessageFlags.Ephemeral ] });
+    const sub = await isSubscribed(interaction);
+    if (!sub) {
+      return;
+    }
+
+    const number = interaction.options.getInteger("number", true);
+    const description = interaction.options.getString("description", true);
+
+    const task = await database.tasks.findUnique({
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    if (task === null) {
+      await interaction.editReply({ content: `You do not have a task with the number ${number.toString()}.` });
+      return;
+    }
+
+    const updated = await database.tasks.update({
+      data: {
+        description,
+      },
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    await interaction.editReply({
+      content: `Redescribed task #${updated.number.toString()}:`,
+      embeds:  [ generateTaskEmbed(updated) ],
+    });
+  } catch (error) {
+    await replyToError(interaction);
+    if (error instanceof Error) {
+      await logger.error("redescribe command", error);
+    }
+  }
+};

src/modules/reprioritise.ts

@@ -0,0 +1,68 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
+import { database } from "../db/database.js";
+import { generateTaskEmbed } from "../utils/generateTaskEmbed.js";
+import { isSubscribed } from "../utils/isSubscribed.js";
+import { logger } from "../utils/logger.js";
+import { replyToError } from "../utils/replyToError.js";
+
+/**
+ * Updates the priority of a task.
+ * @param interaction -- The interaction payload from Discord.
+ */
+export const restate = async(
+  interaction: ChatInputCommandInteraction,
+): Promise<void> => {
+  try {
+    await interaction.deferReply({ flags: [ MessageFlags.Ephemeral ] });
+    const sub = await isSubscribed(interaction);
+    if (!sub) {
+      return;
+    }
+
+    const number = interaction.options.getInteger("number", true);
+    const priority = interaction.options.getString("priority", true);
+
+    const task = await database.tasks.findUnique({
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    if (task === null) {
+      await interaction.editReply({ content: `You do not have a task with the number ${number.toString()}.` });
+      return;
+    }
+
+    const updated = await database.tasks.update({
+      data: {
+        priority,
+      },
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    await interaction.editReply({
+      content: `Restated task #${updated.number.toString()}:`,
+      embeds:  [ generateTaskEmbed(updated) ],
+    });
+  } catch (error) {
+    await replyToError(interaction);
+    if (error instanceof Error) {
+      await logger.error("restate command", error);
+    }
+  }
+};

src/modules/restate.ts

@@ -0,0 +1,68 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
+import { database } from "../db/database.js";
+import { generateTaskEmbed } from "../utils/generateTaskEmbed.js";
+import { isSubscribed } from "../utils/isSubscribed.js";
+import { logger } from "../utils/logger.js";
+import { replyToError } from "../utils/replyToError.js";
+
+/**
+ * Updates the status of a task.
+ * @param interaction -- The interaction payload from Discord.
+ */
+export const restate = async(
+  interaction: ChatInputCommandInteraction,
+): Promise<void> => {
+  try {
+    await interaction.deferReply({ flags: [ MessageFlags.Ephemeral ] });
+    const sub = await isSubscribed(interaction);
+    if (!sub) {
+      return;
+    }
+
+    const number = interaction.options.getInteger("number", true);
+    const status = interaction.options.getString("status", true);
+
+    const task = await database.tasks.findUnique({
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    if (task === null) {
+      await interaction.editReply({ content: `You do not have a task with the number ${number.toString()}.` });
+      return;
+    }
+
+    const updated = await database.tasks.update({
+      data: {
+        status,
+      },
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    await interaction.editReply({
+      content: `Restated task #${updated.number.toString()}:`,
+      embeds:  [ generateTaskEmbed(updated) ],
+    });
+  } catch (error) {
+    await replyToError(interaction);
+    if (error instanceof Error) {
+      await logger.error("restate command", error);
+    }
+  }
+};

src/modules/retarget.ts

@@ -0,0 +1,69 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
+import { database } from "../db/database.js";
+import { generateTaskEmbed } from "../utils/generateTaskEmbed.js";
+import { isSubscribed } from "../utils/isSubscribed.js";
+import { logger } from "../utils/logger.js";
+import { replyToError } from "../utils/replyToError.js";
+
+/**
+ * Updates the due date of a task.
+ * @param interaction -- The interaction payload from Discord.
+ */
+export const retarget = async(
+  interaction: ChatInputCommandInteraction,
+): Promise<void> => {
+  try {
+    await interaction.deferReply({ flags: [ MessageFlags.Ephemeral ] });
+    const sub = await isSubscribed(interaction);
+    if (!sub) {
+      return;
+    }
+
+    const number = interaction.options.getInteger("number", true);
+    const dueDate = interaction.options.getString("dueDate", true);
+    const dueAt = new Date(dueDate);
+
+    const task = await database.tasks.findUnique({
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    if (task === null) {
+      await interaction.editReply({ content: `You do not have a task with the number ${number.toString()}.` });
+      return;
+    }
+
+    const updated = await database.tasks.update({
+      data: {
+        dueAt,
+      },
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    await interaction.editReply({
+      content: `Retargeted task #${updated.number.toString()}:`,
+      embeds:  [ generateTaskEmbed(updated) ],
+    });
+  } catch (error) {
+    await replyToError(interaction);
+    if (error instanceof Error) {
+      await logger.error("retarget command", error);
+    }
+  }
+};

src/modules/retitle.ts

@@ -0,0 +1,68 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
+import { database } from "../db/database.js";
+import { generateTaskEmbed } from "../utils/generateTaskEmbed.js";
+import { isSubscribed } from "../utils/isSubscribed.js";
+import { logger } from "../utils/logger.js";
+import { replyToError } from "../utils/replyToError.js";
+
+/**
+ * Updates the description of a task.
+ * @param interaction -- The interaction payload from Discord.
+ */
+export const retitle = async(
+  interaction: ChatInputCommandInteraction,
+): Promise<void> => {
+  try {
+    await interaction.deferReply({ flags: [ MessageFlags.Ephemeral ] });
+    const sub = await isSubscribed(interaction);
+    if (!sub) {
+      return;
+    }
+
+    const number = interaction.options.getInteger("number", true);
+    const title = interaction.options.getString("title", true);
+
+    const task = await database.tasks.findUnique({
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    if (task === null) {
+      await interaction.editReply({ content: `You do not have a task with the number ${number.toString()}.` });
+      return;
+    }
+
+    const updated = await database.tasks.update({
+      data: {
+        title,
+      },
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    await interaction.editReply({
+      content: `Retitled task #${updated.number.toString()}:`,
+      embeds:  [ generateTaskEmbed(updated) ],
+    });
+  } catch (error) {
+    await replyToError(interaction);
+    if (error instanceof Error) {
+      await logger.error("retitle command", error);
+    }
+  }
+};

src/modules/view.ts

@@ -0,0 +1,53 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
+import { database } from "../db/database.js";
+import { generateTaskEmbed } from "../utils/generateTaskEmbed.js";
+import { isSubscribed } from "../utils/isSubscribed.js";
+import { logger } from "../utils/logger.js";
+import { replyToError } from "../utils/replyToError.js";
+
+/**
+ * Generates an embed for a given task.
+ * @param interaction -- The interaction payload from Discord.
+ */
+export const view = async(
+  interaction: ChatInputCommandInteraction,
+): Promise<void> => {
+  try {
+    await interaction.deferReply({ flags: [ MessageFlags.Ephemeral ] });
+    const sub = await isSubscribed(interaction);
+    if (!sub) {
+      return;
+    }
+
+    const number = interaction.options.getInteger("number", true);
+
+    const task = await database.tasks.findUnique({
+      where: {
+        // eslint-disable-next-line @typescript-eslint/naming-convention -- Index mapping.
+        userId_number: {
+          number: number,
+          userId: interaction.user.id,
+        },
+      },
+    });
+
+    if (task === null) {
+      await interaction.editReply({ content: `You do not have a task with the number ${number.toString()}.` });
+      return;
+    }
+
+    await interaction.editReply({
+      embeds: [ generateTaskEmbed(task) ],
+    });
+  } catch (error) {
+    await replyToError(interaction);
+    if (error instanceof Error) {
+      await logger.error("view command", error);
+    }
+  }
+};

src/server/serve.ts

@@ -0,0 +1,75 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import fastify from "fastify";
+import { logger } from "../utils/logger.js";
+
+const html = `<!DOCTYPE html>
+<html>
+  <head>
+    <title>Melody Iuvo</title>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="description" content="A task management bot for Discord!" />
+    <script src="https://cdn.nhcarrigan.com/headers/index.js" async defer></script>
+  </head>
+  <body>
+    <main>
+    <h1>Melody Iuvo</h1>
+    <section>
+      <p>A task management bot for Discord!</p>
+    </section>
+    <section>
+        <h2>Links</h2>
+        <p>
+            <a href="https://git.nhcarrigan.com/nhcarrigan/melody-iuvo">
+                <i class="fa-solid fa-code"></i> Source Code
+            </a>
+        </p>
+        <p>
+            <a href="https://docs.nhcarrigan.com/">
+                <i class="fa-solid fa-book"></i> Documentation
+            </a>
+        </p>
+        <p>
+            <a href="https://chat.nhcarrigan.com">
+                <i class="fa-solid fa-circle-info"></i> Support
+            </a>
+        </p>
+    </section>
+    </main>
+  </body>
+</html>`;
+
+/**
+ * Starts up a web server for health monitoring.
+ */
+export const instantiateServer = (): void => {
+  try {
+    const server = fastify({
+      logger: false,
+    });
+
+    server.get("/", (_request, response) => {
+      response.header("Content-Type", "text/html");
+      response.send(html);
+    });
+
+    server.listen({ port: 5443 }, (error) => {
+      if (error) {
+        void logger.error("instantiate server", error);
+        return;
+      }
+      void logger.log("debug", "Server listening on port 5443.");
+    });
+  } catch (error) {
+    if (error instanceof Error) {
+      void logger.error("instantiate server", error);
+      return;
+    }
+    void logger.error("instantiate server", new Error("Unknown error"));
+  }
+};

src/utils/generateTaskEmbed.ts

@@ -0,0 +1,73 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { EmbedBuilder, type ColorResolvable } from "discord.js";
+import { priorityNames } from "../config/priorityNames.js";
+import { statusNames } from "../config/statusNames.js";
+import type { Priority } from "../interfaces/priority.js";
+import type { Status } from "../interfaces/status.js";
+import type { Tasks } from "@prisma/client";
+
+const colours: Record<Status, ColorResolvable> = {
+  "complete":    0x00_FF_00,
+  // eslint-disable-next-line @typescript-eslint/naming-convention -- matching the status names.
+  "in-progress": 0xFF_77_00,
+  // eslint-disable-next-line @typescript-eslint/naming-convention -- matching the status names.
+  "in-review":   0xFF_FF_00,
+  "todo":        0xFF_00_00,
+};
+
+/**
+ * Generates a Discord embed for a task.
+ * @param task -- The task record from the database.
+ * @returns An EmbedBuilder.
+ */
+export const generateTaskEmbed = (task: Tasks): EmbedBuilder => {
+  const embed = new EmbedBuilder();
+  embed.setTitle(task.title);
+  embed.setDescription(task.description);
+  embed.addFields(
+    {
+      inline: true,
+      name:   "Category",
+      value:  task.category,
+    },
+    {
+      inline: true,
+      name:   "Status",
+      // eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Totally being lazy here.
+      value:  statusNames[task.status as Status],
+    },
+    {
+      inline: true,
+      name:   "Priority",
+      // eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Totally being lazy here.
+      value:  priorityNames[task.priority as Priority],
+    },
+    {
+      inline: true,
+      name:   "Due Date",
+      value:  task.dueAt.toLocaleDateString("en-GB"),
+    },
+    {
+      inline: true,
+      name:   "Created At",
+      value:  task.createdAt.toLocaleDateString("en-GB"),
+    },
+    {
+      inline: true,
+      name:   "Updated At",
+      value:  task.updatedAt.toLocaleDateString("en-GB"),
+    },
+  );
+  embed.setFooter({
+    text: `Task #${task.number.toString()}`,
+  });
+  embed.setColor(task.status in colours
+    // eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- We narrowed it smh.
+    ? colours[task.status as Status]
+    : 0x00_00_00);
+  return embed;
+};

src/utils/isSubscribed.ts

@@ -0,0 +1,40 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import {
+  ActionRowBuilder,
+  ButtonBuilder,
+  ButtonStyle,
+  type ChatInputCommandInteraction,
+} from "discord.js";
+
+/**
+ * Checks if a user has an active entitlement (subscription) for the bot.
+ * If they do not, it responds to the interaction with a button to subscribe.
+ * @param interaction -- The interaction payload from Discord.
+ * @returns A boolean indicating whether the user is subscribed.
+ */
+export const isSubscribed = async(
+  interaction: ChatInputCommandInteraction,
+): Promise<boolean> => {
+  const isEntitled = interaction.entitlements.find((entitlement) => {
+    return entitlement.userId === interaction.user.id && entitlement.isActive();
+  });
+
+  if (!isEntitled && interaction.user.id !== "465650873650118659") {
+    const subscribeButton = new ButtonBuilder().
+      setStyle(ButtonStyle.Premium).
+      setSKUId("1338755540397985873");
+    const row = new ActionRowBuilder<ButtonBuilder>().addComponents(
+      subscribeButton,
+    );
+    await interaction.editReply({
+      components: [ row ],
+      content:    "You must be subscribed to use this feature.",
+    });
+    return false;
+  }
+  return true;
+};

src/utils/logger.ts

@@ -0,0 +1,12 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import { Logger } from "@nhcarrigan/logger";
+
+export const logger = new Logger(
+  "Melody Iuvo",
+  process.env.LOG_TOKEN ?? "",
+);

src/utils/replyToError.ts

@@ -0,0 +1,38 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import {
+  ActionRowBuilder,
+  ButtonBuilder,
+  ButtonStyle,
+  type ChatInputCommandInteraction,
+  type MessageContextMenuCommandInteraction,
+} from "discord.js";
+
+/**
+ * Responds to an interaction with a generic error message.
+ * @param interaction -- The interaction payload from Discord.
+ */
+export const replyToError = async(
+  interaction:
+    | ChatInputCommandInteraction
+    | MessageContextMenuCommandInteraction,
+): Promise<void> => {
+  const button = new ButtonBuilder().setLabel("Need help?").
+    setStyle(ButtonStyle.Link).
+    setURL("https://chat.nhcarrigan.com");
+  const row = new ActionRowBuilder<ButtonBuilder>().addComponents(button);
+  if (interaction.deferred || interaction.replied) {
+    await interaction.editReply({
+      components: [ row ],
+      content:    "An error occurred while running this command.",
+    });
+    return;
+  }
+  await interaction.reply({
+    components: [ row ],
+    content:    "An error occurred while running this command.",
+  });
+};