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data.js
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data.js
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const MongoClient = require('mongodb').MongoClient;
class DB {
constructor(connectionString){
this.client = new MongoClient(connectionString)
}
async createAccount(tagID){
await this.client.connect()
const db = this.client.db("spacekiosk")
await db.collection("accounts").insertOne({
tagID: tagID,
credit: 0
})
}
async getAccountByTagID(tagID){
await this.client.connect()
.catch((err) => {
console.log("Catched: " + err)
throw "Error connecting to DB"
});
const db = this.client.db("spacekiosk")
const accounts = await db.collection("accounts").find({
tagID: tagID
}).toArray()
if (accounts.length != 1){
return null
}
return accounts[0]
}
async updateCredit(tagID, amount){
await this.client.connect()
const db = this.client.db("spacekiosk")
const accounts = await db.collection("accounts").updateOne({tagID:tagID},
{$inc:{credit:amount}})
return await this.getAccountByTagID(tagID)
}
async getAccounts(){
await this.client.connect()
const db = this.client.db("spacekiosk")
const accounts = await db.collection("accounts").find().toArray()
return accounts
}
}
exports.DB = DB