bun-activitypub/src/db.ts

import { ACTIVITY_PATH, ACTOR, BASE_URL, DATA_PATH, POSTS_PATH } from "./env";
import path from "path"
import { readdir } from "fs/promises"
const matter = require('gray-matter')

export async function doActivity(activity:any, object_id:string|null|undefined) {
  if(activity.type === "Create" && activity.object) {
    if(!object_id) object_id = new Date(activity.object.published).getTime().toString(16)
    const file = Bun.file(path.join(POSTS_PATH, `${object_id}.md`))
    const { content, published, id, attributedTo } = activity.object
    //TODO: add appropriate content for different types (e.g. like-of, etc)
    await Bun.write(file, matter.stringify(content || "", { id, published, attributedTo }))
    const activityFile = Bun.file(path.join(ACTIVITY_PATH, `${object_id}.activity.json`))
    await Bun.write(activityFile, JSON.stringify(activity))
  }
}

export async function getPost(id:string) {
  const file = Bun.file(path.join(POSTS_PATH, `${id}.md`))
  const { data, content } = matter(await file.text())
  return {
    ...data,
    content: content.trim()
  }
}

export async function listPosts() {
  return await Promise.all((await readdir(POSTS_PATH)).filter(v => v.endsWith('.md')).map(async filename => await getPost(filename.slice(0, -3))))
}

export async function getActivity(id:string) {
  const file = Bun.file(path.join(ACTIVITY_PATH, `${id}.activity.json`))
  return await file.json()
}

export async function listActivities() {
  return await Promise.all((await readdir(ACTIVITY_PATH)).filter(v => v.endsWith('.activity.json')).map(async filename => await Bun.file(path.join(ACTIVITY_PATH, filename)).json()))
}

export async function createFollowing(handle:string, id:string) {
  const file = Bun.file(path.join(DATA_PATH, `following.json`))
  const following_list = await file.json() as Array<any>
  if(!following_list.find(v => v.id === id || v.handle === handle)) following_list.push({id, handle, createdAt: new Date().toISOString()})
  await Bun.write(file, JSON.stringify(following_list))
}

export async function deleteFollowing(handle:string) {
  const file = Bun.file(path.join(DATA_PATH, `following.json`))
  const following_list = await file.json() as Array<any>
  await Bun.write(file, JSON.stringify(following_list.filter(v => v.handle !== handle)))
}

export async function getFollowing(handle:string) {
  const file = Bun.file(path.join(DATA_PATH, `following.json`))
  const following_list = await file.json() as Array<any>
  return following_list.find(v => v.handle === handle)
}

export async function listFollowing() {
  const file = Bun.file(path.join(DATA_PATH, `following.json`))
  return await file.json() as Array<any>
}

export async function acceptFollowing(handle:string) {
  const file = Bun.file(path.join(DATA_PATH, `following.json`))
  const following_list = await file.json() as Array<any>
  const following = following_list.find(v => v.handle === handle)
  if(following) following.accepted = new Date().toISOString()
  await Bun.write(file, JSON.stringify(following_list))
}

export async function createFollower(actor:string, id:string) {
  const file = Bun.file(path.join(DATA_PATH, `followers.json`))
  const followers_list = await file.json() as Array<any>
  if(!followers_list.find(v => v.id === id || v.actor === actor)) followers_list.push({id, actor, createdAt: new Date().toISOString()})
  await Bun.write(file, JSON.stringify(followers_list))
}

export async function deleteFollower(actor:string) {
  const file = Bun.file(path.join(DATA_PATH, `followers.json`))
  const followers_list = await file.json() as Array<any>
  await Bun.write(file, JSON.stringify(followers_list.filter(v => v.actor !== actor)))
}

export async function getFollower(actor:string) {
  const file = Bun.file(path.join(DATA_PATH, `followers.json`))
  const followers_list = await file.json() as Array<any>
  return followers_list.find(v => v.actor === actor)
}

export async function listFollowers() {
  const file = Bun.file(path.join(DATA_PATH, `followers.json`))
  return await file.json() as Array<any>
}