From cbd9120c34738c069041f728f19287a60652f59d Mon Sep 17 00:00:00 2001
From: itsMapleLeaf <19603573+itsMapleLeaf@users.noreply.github.com>
Date: Sun, 31 Jul 2022 23:43:32 -0500
Subject: [PATCH] .new.new

---
 .../reacord/library.new.new/core/button.tsx   |  61 ++++++++
 .../library.new.new/core/component-event.ts   |  18 +++
 .../reacord/library.new.new/core/embed.tsx    |  29 ++++
 .../core/make-message-update-payload.ts       |  37 +++++
 packages/reacord/library.new.new/core/node.ts |  45 ++++++
 .../library.new.new/core/reacord-element.ts   |  31 ++++
 .../library.new.new/core/reacord-instance.ts  |  36 +++++
 .../library.new.new/core/reconciler.ts        | 139 ++++++++++++++++++
 .../reacord/library.new.new/core/text-node.ts |   7 +
 .../library.new.new/djs/reacord-discord-js.ts |  69 +++++++++
 10 files changed, 472 insertions(+)
 create mode 100644 packages/reacord/library.new.new/core/button.tsx
 create mode 100644 packages/reacord/library.new.new/core/component-event.ts
 create mode 100644 packages/reacord/library.new.new/core/embed.tsx
 create mode 100644 packages/reacord/library.new.new/core/make-message-update-payload.ts
 create mode 100644 packages/reacord/library.new.new/core/node.ts
 create mode 100644 packages/reacord/library.new.new/core/reacord-element.ts
 create mode 100644 packages/reacord/library.new.new/core/reacord-instance.ts
 create mode 100644 packages/reacord/library.new.new/core/reconciler.ts
 create mode 100644 packages/reacord/library.new.new/core/text-node.ts
 create mode 100644 packages/reacord/library.new.new/djs/reacord-discord-js.ts

diff --git a/packages/reacord/library.new.new/core/button.tsx b/packages/reacord/library.new.new/core/button.tsx
new file mode 100644
index 0000000..5d236e3
--- /dev/null
+++ b/packages/reacord/library.new.new/core/button.tsx
@@ -0,0 +1,61 @@
+import type { APIMessageComponentButtonInteraction } from "discord.js"
+import { randomUUID } from "node:crypto"
+import type { ReactNode } from "react"
+import React from "react"
+import type { ComponentEvent } from "./component-event.js"
+import { Node } from "./node.js"
+import { ReacordElement } from "./reacord-element.js"
+
+export type ButtonProps = {
+  /** The text on the button. Rich formatting (markdown) is not supported here. */
+  label?: ReactNode
+
+  /** The text on the button. Rich formatting (markdown) is not supported here.
+   * If both `label` and `children` are passed, `children` will be ignored.
+   */
+  children?: ReactNode
+
+  /** When true, the button will be slightly faded, and cannot be clicked. */
+  disabled?: boolean
+
+  /**
+   * Renders an emoji to the left of the text.
+   * Has to be a literal emoji character (e.g. 🍍),
+   * or an emoji code, like `<:plus_one:778531744860602388>`.
+   *
+   * To get an emoji code, type your emoji in Discord chat
+   * with a backslash `\` in front.
+   * The bot has to be in the emoji's guild to use it.
+   */
+  emoji?: string
+
+  /**
+   * The style determines the color of the button and signals intent.
+   * @see https://discord.com/developers/docs/interactions/message-components#button-object-button-styles
+   */
+  style?: "primary" | "secondary" | "success" | "danger"
+
+  /**
+   * Happens when a user clicks the button.
+   */
+  onClick: (event: ButtonClickEvent) => void
+}
+
+/**
+ * @category Button
+ */
+export type ButtonClickEvent = ComponentEvent & {
+  interaction: APIMessageComponentButtonInteraction
+}
+
+export function Button({ label, children, ...props }: ButtonProps) {
+  return (
+    <ReacordElement createNode={() => new ButtonNode(props)}>
+      {label ?? children}
+    </ReacordElement>
+  )
+}
+
+export class ButtonNode extends Node<ButtonProps> {
+  readonly customId = randomUUID()
+}
diff --git a/packages/reacord/library.new.new/core/component-event.ts b/packages/reacord/library.new.new/core/component-event.ts
new file mode 100644
index 0000000..0dc8b4c
--- /dev/null
+++ b/packages/reacord/library.new.new/core/component-event.ts
@@ -0,0 +1,18 @@
+import type { ReactNode } from "react"
+import type { ReacordInstance } from "./reacord-instance"
+
+/**
+ * @category Component Event
+ */
+export type ComponentEvent = {
+  /**
+   * Create a new reply to this event.
+   */
+  reply(content?: ReactNode): ReacordInstance
+
+  /**
+   * Create an ephemeral reply to this event,
+   * shown only to the user who triggered it.
+   */
+  ephemeralReply(content?: ReactNode): ReacordInstance
+}
diff --git a/packages/reacord/library.new.new/core/embed.tsx b/packages/reacord/library.new.new/core/embed.tsx
new file mode 100644
index 0000000..c725f26
--- /dev/null
+++ b/packages/reacord/library.new.new/core/embed.tsx
@@ -0,0 +1,29 @@
+import type { ReactNode } from "react"
+import React from "react"
+import type { Except } from "type-fest"
+
+export type EmbedProps = {
+  title?: string
+  description?: string
+  url?: string
+  color?: number
+  fields?: Array<{ name: string; value: string; inline?: boolean }>
+  author?: { name: string; url?: string; iconUrl?: string }
+  thumbnail?: { url: string }
+  image?: { url: string }
+  video?: { url: string }
+  footer?: { text: string; iconUrl?: string }
+  timestamp?: string | number | Date
+  children?: ReactNode
+}
+
+export function Embed({ children, ...props }: EmbedProps) {
+  return <reacord-embed {...props}>{children}</reacord-embed>
+}
+
+declare global {
+  // eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+  interface ReacordHostElementMap {
+    "reacord-embed": Except<EmbedProps, "children">
+  }
+}
diff --git a/packages/reacord/library.new.new/core/make-message-update-payload.ts b/packages/reacord/library.new.new/core/make-message-update-payload.ts
new file mode 100644
index 0000000..2bc99c4
--- /dev/null
+++ b/packages/reacord/library.new.new/core/make-message-update-payload.ts
@@ -0,0 +1,37 @@
+import { omit } from "@reacord/helpers/omit"
+import type {
+  APIActionRowComponent,
+  APIEmbed,
+  APIMessageActionRowComponent,
+} from "discord.js"
+import type { HostElement } from "./host-element.js"
+
+export type MessageUpdatePayload = {
+  content: string
+  embeds: APIEmbed[]
+  components: Array<APIActionRowComponent<APIMessageActionRowComponent>>
+}
+
+export function makeMessageUpdatePayload(
+  tree: HostElement<keyof ReacordHostElementMap>,
+): MessageUpdatePayload {
+  return {
+    content: tree.children
+      .map((child) => (child.type === "reacord-text" ? child.props.text : ""))
+      .join(""),
+
+    embeds: tree.children.flatMap<APIEmbed>((child) => {
+      if (child.type !== "reacord-embed") return []
+
+      const embed: APIEmbed = omit(child.props, ["timestamp"])
+
+      if (child.props.timestamp != undefined) {
+        embed.timestamp = new Date(child.props.timestamp).toISOString()
+      }
+
+      return embed
+    }),
+
+    components: [],
+  }
+}
diff --git a/packages/reacord/library.new.new/core/node.ts b/packages/reacord/library.new.new/core/node.ts
new file mode 100644
index 0000000..4a49d22
--- /dev/null
+++ b/packages/reacord/library.new.new/core/node.ts
@@ -0,0 +1,45 @@
+export class Node<Props = unknown> {
+  private readonly _children: Node[] = []
+
+  constructor(public props: Props) {}
+
+  get children(): readonly Node[] {
+    return this._children
+  }
+
+  clear() {
+    this._children.splice(0)
+  }
+
+  add(...nodes: Node[]) {
+    this._children.push(...nodes)
+  }
+
+  remove(node: Node) {
+    const index = this._children.indexOf(node)
+    if (index !== -1) this._children.splice(index, 1)
+  }
+
+  insertBefore(node: Node, beforeNode: Node) {
+    const index = this._children.indexOf(beforeNode)
+    if (index !== -1) this._children.splice(index, 0, node)
+  }
+
+  replace(oldNode: Node, newNode: Node) {
+    const index = this._children.indexOf(oldNode)
+    if (index !== -1) this._children[index] = newNode
+  }
+
+  clone(): this {
+    const cloned: this = new (this.constructor as any)()
+    cloned.add(...this.children.map((child) => child.clone()))
+    return cloned
+  }
+
+  *walk(): Generator<Node> {
+    yield this
+    for (const child of this.children) {
+      yield* child.walk()
+    }
+  }
+}
diff --git a/packages/reacord/library.new.new/core/reacord-element.ts b/packages/reacord/library.new.new/core/reacord-element.ts
new file mode 100644
index 0000000..bfcd960
--- /dev/null
+++ b/packages/reacord/library.new.new/core/reacord-element.ts
@@ -0,0 +1,31 @@
+import { createElement } from "react"
+import type { Node } from "./node.js"
+
+export type ReacordElementHostProps = {
+  factory: ReacordElementFactory
+}
+
+export function ReacordElement(props: {
+  createNode: () => Node
+  children?: React.ReactNode
+}) {
+  return createElement<ReacordElementHostProps>(
+    "reacord-element",
+    { factory: new ReacordElementFactory(props.createNode) },
+    props.children,
+  )
+}
+
+export class ReacordElementFactory {
+  constructor(public readonly createNode: () => Node) {}
+
+  static unwrap(maybeFactory: unknown): Node {
+    if (maybeFactory instanceof ReacordElementFactory) {
+      return maybeFactory.createNode()
+    }
+    const received = (maybeFactory as any)?.constructor.name
+    throw new TypeError(
+      `Expected a ${ReacordElementFactory.name}, got ${received}`,
+    )
+  }
+}
diff --git a/packages/reacord/library.new.new/core/reacord-instance.ts b/packages/reacord/library.new.new/core/reacord-instance.ts
new file mode 100644
index 0000000..9343a75
--- /dev/null
+++ b/packages/reacord/library.new.new/core/reacord-instance.ts
@@ -0,0 +1,36 @@
+import type { ReactNode } from "react"
+import type { ButtonClickEvent } from "./button.js"
+import { ButtonNode } from "./button.js"
+import type { HostElement } from "./host-element.js"
+import { Node } from "./node.js"
+import { reconciler } from "./reconciler.js"
+
+export type ReacordRenderer = {
+  updateMessage(tree: HostElement): Promise<void>
+}
+
+export class ReacordInstance {
+  readonly currentTree = new Node()
+  private latestTree?: Node
+  private readonly reconcilerContainer = reconciler.createContainer()
+
+  constructor(private readonly renderer: ReacordRenderer) {}
+
+  render(content?: ReactNode) {
+    reconciler.updateContainer(content, this.reconcilerContainer)
+  }
+
+  async updateMessage(tree: Node) {
+    await this.renderer.updateMessage(tree)
+    this.latestTree = tree
+  }
+
+  handleButtonInteraction(customId: string, event: ButtonClickEvent) {
+    if (!this.latestTree) return
+    for (const node of this.latestTree.walk()) {
+      if (node instanceof ButtonNode && node.customId === customId) {
+        node.props.onClick(event)
+      }
+    }
+  }
+}
diff --git a/packages/reacord/library.new.new/core/reconciler.ts b/packages/reacord/library.new.new/core/reconciler.ts
new file mode 100644
index 0000000..a4531e8
--- /dev/null
+++ b/packages/reacord/library.new.new/core/reconciler.ts
@@ -0,0 +1,139 @@
+/* eslint-disable unicorn/prefer-modern-dom-apis */
+import ReactReconciler from "react-reconciler"
+import { DefaultEventPriority } from "react-reconciler/constants"
+import type { Node } from "./node.js"
+import type { ReacordElementHostProps } from "./reacord-element.js"
+import { ReacordElementFactory } from "./reacord-element.js"
+import type { ReacordInstance } from "./reacord-instance.js"
+import { TextNode } from "./text-node.js"
+
+// technically elements of any shape can go through the reconciler,
+// so I'm typing this as unknown to ensure we validate the props
+// before using them
+type ReconcilerProps = {
+  [_ in keyof ReacordElementHostProps]?: unknown
+}
+
+export const reconciler = ReactReconciler<
+  string, // Type
+  ReconcilerProps, // Props
+  ReacordInstance, // Container
+  Node, // Instance
+  TextNode, // TextInstance
+  never, // SuspenseInstance
+  never, // HydratableInstance
+  never, // PublicInstance
+  {}, // HostContext
+  true, // UpdatePayload
+  never, // ChildSet
+  NodeJS.Timeout, // TimeoutHandle
+  -1 // NoTimeout
+>({
+  isPrimaryRenderer: true,
+  supportsMutation: true,
+  supportsHydration: false,
+  supportsPersistence: false,
+  scheduleTimeout: setTimeout,
+  cancelTimeout: clearTimeout,
+  noTimeout: -1,
+
+  createInstance(type, props) {
+    return ReacordElementFactory.unwrap(props.factory)
+  },
+
+  createTextInstance(text) {
+    return new TextNode(text)
+  },
+
+  appendInitialChild(parent, child) {
+    parent.add(child)
+  },
+
+  appendChild(parent, child) {
+    parent.add(child)
+  },
+
+  appendChildToContainer(container, child) {
+    container.currentTree.add(child)
+  },
+
+  insertBefore(parent, child, beforeChild) {
+    parent.insertBefore(child, beforeChild)
+  },
+
+  insertInContainerBefore(container, child, beforeChild) {
+    container.currentTree.insertBefore(child, beforeChild)
+  },
+
+  removeChild(parent, child) {
+    parent.remove(child)
+  },
+
+  removeChildFromContainer(container, child) {
+    container.currentTree.remove(child)
+  },
+
+  clearContainer(container) {
+    container.currentTree.clear()
+  },
+
+  commitTextUpdate(node, oldText, newText) {
+    node.text = newText
+  },
+
+  prepareUpdate() {
+    return true
+  },
+
+  commitUpdate(node, updatePayload, type, prevProps, nextProps) {
+    node.props = ReacordElementFactory.unwrap(nextProps.factory).props
+  },
+
+  prepareForCommit() {
+    // eslint-disable-next-line unicorn/no-null
+    return null
+  },
+
+  resetAfterCommit(container) {
+    container.updateMessage(container.currentTree.clone()).catch(console.error)
+  },
+
+  finalizeInitialChildren() {
+    return false
+  },
+
+  shouldSetTextContent() {
+    return false
+  },
+
+  getRootHostContext() {
+    return {}
+  },
+
+  getChildHostContext() {
+    return {}
+  },
+
+  getPublicInstance() {
+    throw new Error("Refs are not supported")
+  },
+
+  preparePortalMount() {},
+
+  getCurrentEventPriority() {
+    return DefaultEventPriority
+  },
+
+  getInstanceFromNode() {
+    return undefined
+  },
+
+  beforeActiveInstanceBlur() {},
+  afterActiveInstanceBlur() {},
+  prepareScopeUpdate() {},
+  getInstanceFromScope() {
+    // eslint-disable-next-line unicorn/no-null
+    return null
+  },
+  detachDeletedInstance() {},
+})
diff --git a/packages/reacord/library.new.new/core/text-node.ts b/packages/reacord/library.new.new/core/text-node.ts
new file mode 100644
index 0000000..73002dd
--- /dev/null
+++ b/packages/reacord/library.new.new/core/text-node.ts
@@ -0,0 +1,7 @@
+import { Node } from "./node.js"
+
+export class TextNode extends Node {
+  constructor(public text: string) {
+    super()
+  }
+}
diff --git a/packages/reacord/library.new.new/djs/reacord-discord-js.ts b/packages/reacord/library.new.new/djs/reacord-discord-js.ts
new file mode 100644
index 0000000..af8ebe8
--- /dev/null
+++ b/packages/reacord/library.new.new/djs/reacord-discord-js.ts
@@ -0,0 +1,69 @@
+import type {
+  APIMessageComponentButtonInteraction,
+  Client,
+  Message,
+  TextChannel,
+} from "discord.js"
+import type { ReactNode } from "react"
+import type { HostElement } from "../core/host-element.js"
+import { makeMessageUpdatePayload } from "../core/make-message-update-payload.js"
+import type { ReacordRenderer } from "../core/reacord-instance.js"
+import { ReacordInstance } from "../core/reacord-instance.js"
+
+export class ReacordDiscordJs {
+  instances: ReacordInstance[] = []
+
+  constructor(private readonly client: Client) {
+    client.on("interactionCreate", (interaction) => {
+      if (!interaction.inGuild()) return
+
+      if (interaction.isButton()) {
+        const json =
+          interaction.toJSON() as APIMessageComponentButtonInteraction
+
+        for (const instance of this.instances) {
+          instance.handleButtonInteraction(interaction.customId, {
+            interaction: json,
+            reply: () => {},
+            ephemeralReply: () => {},
+          })
+        }
+      }
+
+      if (interaction.isSelectMenu()) {
+        // etc.
+      }
+    })
+  }
+
+  send(channelId: string, initialContent?: ReactNode) {
+    const instance = new ReacordInstance(
+      new ChannelMessageRenderer(this.client, channelId),
+    )
+    if (initialContent !== undefined) {
+      instance.render(initialContent)
+    }
+  }
+}
+
+class ChannelMessageRenderer implements ReacordRenderer {
+  private message?: Message
+
+  constructor(
+    private readonly client: Client,
+    private readonly channelId: string,
+  ) {}
+
+  async updateMessage(tree: HostElement) {
+    const payload = makeMessageUpdatePayload(tree)
+
+    if (!this.message) {
+      const channel = (await this.client.channels.fetch(
+        this.channelId,
+      )) as TextChannel
+      this.message = await channel.send(payload)
+    } else {
+      await this.message.edit(payload)
+    }
+  }
+}