Created
September 19, 2023 19:27
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import crypto from 'crypto' | |
import GUN from 'gun'; | |
import 'gun/sea.js'; | |
import 'gun/lib/open.js' | |
import 'gun/lib/load.js' | |
import { sha256 } from 'js-sha256'; | |
import Geohash from 'latlon-geohash'; | |
var SEA = GUN.SEA; | |
var gun = GUN({ | |
localStorage: true, | |
radisk: true, | |
}) | |
const uuid = () => { | |
return crypto.randomUUID() | |
} | |
const createSecret = () => { | |
return (Math.random() + 1).toString(36).substring(7).toUpperCase(); | |
} | |
const hashSecret = (secret) => { | |
return sha256(secret) | |
} | |
class DB { | |
constructor() { | |
this.settings = { | |
cert: null, | |
admin_pub: null, | |
logged_in_user: null | |
} | |
this.tables = { | |
users: null, | |
messages: null, | |
sheeps: null, | |
takens: null, | |
geohashes: null | |
} | |
} | |
get user() { | |
return this.settings.logged_in_user | |
} | |
get cert() { | |
return this.settings.cert | |
} | |
get adminPub() { | |
return this.settings.admin_pub | |
} | |
randomHash() { | |
return crypto.randomBytes(8).toString('base64'); | |
} | |
async create() { | |
var serverAdmin = await SEA.pair(); | |
await gun.user().auth(serverAdmin); | |
let rules = [ | |
{ "#": { "*": "users" }, ".": { "+": "*" } }, | |
{ "#": { "*": "messages" }, ".": { "+": "*" } }, | |
{ "#": { "*": "sheeps" }, ".": { "+": "*" } }, | |
{ "#": { "*": "takens" }, ".": { "+": "*" } }, | |
{ "#": { "*": "geohashes" }, ".": { "+": "*" } } | |
] | |
var certificate = await SEA.certify("*", rules, serverAdmin, null) | |
await gun.user(serverAdmin.pub).get("admin").get("cert").put(certificate).then() | |
return serverAdmin | |
} | |
async load(adminPub) { | |
console.log(this.settings) | |
this.settings.cert = await gun.user(adminPub).get("admin").get("cert"); | |
this.settings.admin_pub = adminPub; | |
console.log(this.settings) | |
for (const table in this.tables) { | |
this.tables[table] = gun.user(this.settings.admin_pub).get(table) | |
} | |
this.tables.root = gun.user(this.settings.admin_pub) | |
} | |
async createUser(username, password) { | |
let existingUser = await this.getUserByUsername(username) | |
if (existingUser) { | |
throw Error("user already exists") | |
} | |
try { | |
let salt = this.randomHash() | |
let saltedUsername = username + salt | |
await new Promise((resolve, reject) => { | |
gun.user().create(saltedUsername, password, ack => { | |
if (ack.err) { | |
reject(ack.err) | |
} else { | |
resolve(ack) | |
} | |
}) | |
}) | |
await new Promise((resolve, reject) => { | |
gun.user().auth(saltedUsername, password, ack => { | |
if (ack.err) { | |
reject(ack.err) | |
} else { | |
resolve(ack) | |
} | |
}) | |
}) | |
let userPub = gun.user().is.pub | |
var user = { | |
username: username, | |
salted_username: saltedUsername, | |
created_at: Date.now(), | |
pub: userPub | |
} | |
this.settings.logged_in_user = user | |
await this.tables.users.get(username).get(userPub).put(user, null, { opt: { cert: this.cert } }).then() | |
} catch (e) { | |
return Error("error creating user:", e) | |
} | |
} | |
async getUserByUsername(username) { | |
return await new Promise((resolve, reject) => { | |
const TimerId = setTimeout(() => { | |
resolve(null) // the requested node seems not to exist (yet) | |
}, 2000) | |
this.tables.users.get(username).map().load(data => { | |
clearTimeout(TimerId) | |
resolve(data) | |
}, { wait: 0 }) | |
}) | |
} | |
async getSheepById(sheepId) { | |
return await new Promise((resolve, reject) => { | |
const TimerId = setTimeout(() => { | |
resolve(null) // the requested node seems not to exist (yet) | |
}, 2000) | |
this.tables.sheeps.get(sheepId).map().load(data => { | |
clearTimeout(TimerId) | |
resolve(data) | |
}, { wait: 0 }) | |
}) | |
} | |
async login(username, password) { | |
let existingUser = await this.getUserByUsername(username) | |
if (!existingUser) { | |
throw Error("user doesnt exists") | |
} | |
try { | |
await new Promise((resolve, reject) => { | |
gun.user().auth(existingUser.salted_username, password, ack => { | |
if (ack.err) { | |
reject(ack.err) | |
} else { | |
resolve(ack) | |
} | |
}) | |
}) | |
var user = { | |
username: existingUser.username, | |
salted_username: existingUser.salted_username, | |
created_at: existingUser.created_at, | |
pub: existingUser.pub | |
} | |
this.settings.logged_in_user = user | |
} catch (e) { | |
return Error("auth user error:", e) | |
} | |
} | |
listenForGeoHashes() { | |
var ev = null | |
function handler(data) { | |
console.log("got eveeeeent", JSON.stringify(data)) | |
//... | |
} | |
this.tables.geohashes.open(handler) | |
} | |
async createSheep({ image, tags, lat, lon }) { | |
var sheepId = uuid() | |
var secret = createSecret() | |
var geohash = Geohash.encode(lat, lon, 10); | |
var tagsObject = {} | |
for (var i = 0; i < tags.length; ++i) { | |
tagsObject[tags[i]] = tags[i]; | |
} | |
var info = { | |
id: sheepId, | |
date: Date.now(), | |
image: image, | |
lat: lat, | |
lon: lon, | |
geohash: geohash, | |
secret_hash: hashSecret(secret), | |
author: { username: this.user.username, pub: this.user.pub }, | |
tags: tagsObject | |
}; | |
var sheep = this.tables.sheeps.get(sheepId).get(this.user.pub).put(info, null, { opt: { cert: this.cert } }) | |
var geohashItem = this.tables.geohashes | |
for (let i = 0; i < geohash.length; i++) { | |
geohashItem = geohashItem.get(geohash.charAt(i)) | |
} | |
var geohashPointer = geohashItem.get(this.user.pub).get(sheepId).put(sheep, null, { opt: { cert: this.cert } }) | |
this.tables.users.get(this.user.username).get(this.user.pub).get("sheeps").set(sheep, null, { opt: { cert: this.cert } }) | |
var s = { "u": { "1": { "2": { "0": { "f": { "w": { "x": { "r": { "h": { "1": { "BiFxxSQpY8fybuQpZv8UklRTvBUsVdQXjggGUziPJOQ.wc654AZ7Z71IMV5luQg0purGxXBVdkZ7dC-T3qRwERY": { "5b48e680-de49-4f8f-8324-85e0b4b98730": { "author": { "pub": "BiFxxSQpY8fybuQpZv8UklRTvBUsVdQXjggGUziPJOQ.wc654AZ7Z71IMV5luQg0purGxXBVdkZ7dC-T3qRwERY", "username": "foobarbas" }, "date": 1695151432318, "lat": 52.2, "lon": 0.12, "tags": { "cat": "cat", "lol": "lol" }, "geohash": "u120fwxrh1", "id": "5b48e680-de49-4f8f-8324-85e0b4b98730", "image": "foo", "secret_hash": "25db323817a93cda07e9ec85ea799e17e3eb9cfa88f7c1062127e5edccc7768d" } } } } } } } } } } } } } | |
return { secret, ...info } | |
} | |
async createMessage({ sheepId, message, sheepAuthorPub }) { | |
console.log("sheepAuthor", sheepAuthorPub) | |
var messageId = uuid() | |
var info = { | |
author: { username: this.user.username, pub: this.user.pub }, | |
sheepId: sheepId, | |
id: messageId, | |
date: Date.now(), | |
message: message, | |
taken: "" | |
}; | |
var message = this.tables.messages.get(messageId).get(this.user.pub).put(info, null, { opt: { cert: this.cert } }) | |
var sheep = this.tables.sheeps.get(sheepId).get(sheepAuthorPub) | |
sheep.get("messages").get(messageId).put(message, null, { opt: { cert: this.cert } }) | |
message.get("sheep").put(sheep, null, { opt: { cert: this.cert } }) | |
sheep = await this.tables.sheeps.get(sheepId).get(sheepAuthorPub).then() | |
message = await this.tables.messages.get(messageId).get(this.user.pub).then() | |
console.log("mucho", message, "sheep", sheep) | |
return { messageId } | |
} | |
} | |
export default DB |
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import DB from './src/helpers/db.mjs'; | |
(async () => { | |
let db = new DB() | |
let admin = await db.create() | |
let err | |
err = await db.load(admin.pub) | |
err = await db.createUser("foobarbas", "foobarbas") | |
err = await db.login("foobarbas", "foobarbas") | |
console.log("logged in user", db.user, "err", err) | |
db.listenForGeoHashes() | |
var sheep= await db.createSheep({image:"foo", tags:["lol", "cat"], lat:52.20, lon:0.12}); | |
sheep = await db.getSheepById(sheep.id) | |
console.log("sheep", sheep) | |
await db.createMessage({sheepId:sheep.id, message:"lol", sheepAuthorPub:sheep.author.pub}) | |
sheep = await db.getSheepById(sheep.id) | |
console.log("sheep and messages", sheep) | |
})(); |
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