move stuff around until it feels right

library/adapter/adapter.ts

@@ -0,0 +1,9 @@
+import type { CommandInteraction, ComponentInteraction } from "../interaction"
+
+export type Adapter<InteractionInit> = {
+  addComponentInteractionListener(
+    listener: (interaction: ComponentInteraction) => void,
+  ): void
+
+  createCommandInteraction(interactionInfo: InteractionInit): CommandInteraction
+}

library/adapter/discord-js-adapter.ts

@@ -0,0 +1,103 @@
+import type * as Discord from "discord.js"
+import { raise } from "../../helpers/raise"
+import { toUpper } from "../../helpers/to-upper"
+import type { CommandInteraction, ComponentInteraction } from "../interaction"
+import type { Message, MessageOptions } from "../message"
+import type { Adapter } from "./adapter"
+
+export class DiscordJsAdapter implements Adapter<Discord.CommandInteraction> {
+  constructor(private client: Discord.Client) {}
+
+  addComponentInteractionListener(
+    listener: (interaction: ComponentInteraction) => void,
+  ) {
+    this.client.on("interactionCreate", (interaction) => {
+      if (interaction.isButton()) {
+        listener(createReacordComponentInteraction(interaction))
+      }
+    })
+  }
+
+  // eslint-disable-next-line class-methods-use-this
+  createCommandInteraction(
+    interaction: Discord.CommandInteraction,
+  ): CommandInteraction {
+    return {
+      type: "command",
+      id: interaction.id,
+      channelId: interaction.channelId,
+      reply: async (options) => {
+        const message = await interaction.reply({
+          ...getDiscordMessageOptions(options),
+          fetchReply: true,
+        })
+        return createReacordMessage(message as Discord.Message)
+      },
+      followUp: async (options) => {
+        const message = await interaction.followUp({
+          ...getDiscordMessageOptions(options),
+          fetchReply: true,
+        })
+        return createReacordMessage(message as Discord.Message)
+      },
+    }
+  }
+}
+
+function createReacordComponentInteraction(
+  interaction: Discord.MessageComponentInteraction,
+): ComponentInteraction {
+  return {
+    type: "button",
+    id: interaction.id,
+    channelId: interaction.channelId,
+    customId: interaction.customId,
+    update: async (options) => {
+      await interaction.update(getDiscordMessageOptions(options))
+    },
+  }
+}
+
+function createReacordMessage(message: Discord.Message): Message {
+  return {
+    edit: async (options) => {
+      await message.edit(getDiscordMessageOptions(options))
+    },
+    disableComponents: async () => {
+      for (const actionRow of message.components) {
+        for (const component of actionRow.components) {
+          component.setDisabled(true)
+        }
+      }
+
+      await message.edit({
+        components: message.components,
+      })
+    },
+  }
+}
+
+function getDiscordMessageOptions(
+  options: MessageOptions,
+): Discord.MessageOptions {
+  return {
+    content: options.content,
+    embeds: options.embeds,
+    components: options.actionRows.map((row) => ({
+      type: "ACTION_ROW",
+      components: row.map((component) => {
+        if (component.type === "button") {
+          return {
+            type: "BUTTON",
+            customId: component.customId,
+            label: component.label ?? "",
+            style: toUpper(component.style ?? "secondary"),
+            disabled: component.disabled,
+            emoji: component.emoji,
+          }
+        }
+        raise(`Unsupported component type: ${component.type}`)
+      }),
+    })),
+  }
+}

library/adapter/test-adapter.ts

@@ -0,0 +1,107 @@
+import { nanoid } from "nanoid"
+import { raise } from "../../helpers/raise"
+import type {
+  ButtonInteraction,
+  CommandInteraction,
+  ComponentInteraction,
+} from "../interaction"
+import type { Message, MessageButtonOptions, MessageOptions } from "../message"
+import type { Adapter } from "./adapter"
+
+export class TestAdapter implements Adapter<{}> {
+  readonly messages: TestMessage[] = []
+
+  // eslint-disable-next-line class-methods-use-this
+  private componentInteractionListener: (
+    interaction: ComponentInteraction,
+  ) => void = () => {}
+
+  addComponentInteractionListener(
+    listener: (interaction: ComponentInteraction) => void,
+  ): void {
+    this.componentInteractionListener = listener
+  }
+
+  // eslint-disable-next-line class-methods-use-this
+  createCommandInteraction(
+    interaction: CommandInteraction,
+  ): CommandInteraction {
+    return interaction
+  }
+
+  findButtonByLabel(label: string) {
+    for (const message of this.messages) {
+      for (const component of message.options.actionRows.flat()) {
+        if (component.type === "button" && component.label === label) {
+          return this.createButtonActions(component, message)
+        }
+      }
+    }
+    raise(`Couldn't find button with label "${label}"`)
+  }
+
+  private createButtonActions(
+    button: MessageButtonOptions,
+    message: TestMessage,
+  ) {
+    return {
+      click: () => {
+        this.componentInteractionListener(
+          new TestButtonInteraction(button.customId, message),
+        )
+      },
+    }
+  }
+}
+
+export class TestMessage implements Message {
+  constructor(public options: MessageOptions) {}
+
+  async edit(options: MessageOptions): Promise<void> {
+    this.options = options
+  }
+
+  async disableComponents(): Promise<void> {
+    for (const row of this.options.actionRows) {
+      for (const action of row) {
+        if (action.type === "button") {
+          action.disabled = true
+        }
+      }
+    }
+  }
+}
+
+export class TestCommandInteraction implements CommandInteraction {
+  readonly type = "command"
+  readonly id = "test-command-interaction"
+  readonly channelId = "test-channel-id"
+
+  constructor(private adapter: TestAdapter) {}
+
+  private createMesssage(messageOptions: MessageOptions): Message {
+    const message = new TestMessage(messageOptions)
+    this.adapter.messages.push(message)
+    return message
+  }
+
+  reply(messageOptions: MessageOptions): Promise<Message> {
+    return Promise.resolve(this.createMesssage(messageOptions))
+  }
+
+  followUp(messageOptions: MessageOptions): Promise<Message> {
+    return Promise.resolve(this.createMesssage(messageOptions))
+  }
+}
+
+export class TestButtonInteraction implements ButtonInteraction {
+  readonly type = "button"
+  readonly id = nanoid()
+  readonly channelId = "test-channel-id"
+
+  constructor(readonly customId: string, readonly message: TestMessage) {}
+
+  async update(options: MessageOptions): Promise<void> {
+    this.message.options = options
+  }
+}