Merge branch 'master' into remove-showEmail

backend/src/auth/RIGHTS.ts

@@ -18,6 +18,7 @@ export enum RIGHTS {
   SET_PASSWORD = 'SET_PASSWORD',
   UPDATE_USER_INFOS = 'UPDATE_USER_INFOS',
   HAS_ELOPAGE = 'HAS_ELOPAGE',
+  CREATE_TRANSACTION_LINK = 'CREATE_TRANSACTION_LINK',
   // Admin
   SEARCH_USERS = 'SEARCH_USERS',
   CREATE_PENDING_CREATION = 'CREATE_PENDING_CREATION',

backend/src/auth/ROLES.ts

@@ -18,6 +18,7 @@ export const ROLE_USER = new Role('user', [
   RIGHTS.LOGOUT,
   RIGHTS.UPDATE_USER_INFOS,
   RIGHTS.HAS_ELOPAGE,
+  RIGHTS.CREATE_TRANSACTION_LINK,
 ])
 export const ROLE_ADMIN = new Role('admin', Object.values(RIGHTS)) // all rights
 

backend/src/graphql/arg/TransactionLinkArgs.ts

@@ -0,0 +1,14 @@
+import { ArgsType, Field } from 'type-graphql'
+import Decimal from 'decimal.js-light'
+
+@ArgsType()
+export default class TransactionLinkArgs {
+  @Field(() => Decimal)
+  amount: Decimal
+
+  @Field(() => String)
+  memo: string
+
+  @Field(() => Boolean, { nullable: true })
+  showEmail?: boolean
+}

backend/src/graphql/model/TransactionLink.ts

@@ -1,9 +1,25 @@
 import { ObjectType, Field } from 'type-graphql'
 import Decimal from 'decimal.js-light'
+import { TransactionLink as dbTransactionLink } from '@entity/TransactionLink'
 import { User } from './User'
 
 @ObjectType()
 export class TransactionLink {
+  constructor(transactionLink: dbTransactionLink, user: User, redeemedBy: User | null = null) {
+    this.id = transactionLink.id
+    this.user = user
+    this.amount = transactionLink.amount
+    this.holdAvailableAmount = transactionLink.holdAvailableAmount
+    this.memo = transactionLink.memo
+    this.code = transactionLink.code
+    this.createdAt = transactionLink.createdAt
+    this.validUntil = transactionLink.validUntil
+    this.showEmail = transactionLink.showEmail
+    this.deletedAt = transactionLink.deletedAt
+    this.redeemedAt = transactionLink.redeemedAt
+    this.redeemedBy = redeemedBy
+  }
+
   @Field(() => Number)
   id: number
 

backend/src/graphql/resolver/TransactionLinkResolver.test.ts

@@ -0,0 +1,14 @@
+import { transactionLinkCode } from './TransactionLinkResolver'
+
+describe('transactionLinkCode', () => {
+  const date = new Date()
+
+  it('returns a string of length 24', () => {
+    expect(transactionLinkCode(date)).toHaveLength(24)
+  })
+
+  it('returns a string that ends with the hex value of date', () => {
+    const regexp = new RegExp(date.getTime().toString(16) + '$')
+    expect(transactionLinkCode(date)).toEqual(expect.stringMatching(regexp))
+  })
+})

backend/src/graphql/resolver/TransactionLinkResolver.ts

@@ -0,0 +1,70 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
+
+import { Resolver, Args, Authorized, Ctx, Mutation } from 'type-graphql'
+import { getCustomRepository } from '@dbTools/typeorm'
+import { TransactionLink } from '@model/TransactionLink'
+import { TransactionLink as dbTransactionLink } from '@entity/TransactionLink'
+import TransactionLinkArgs from '@arg/TransactionLinkArgs'
+import { UserRepository } from '@repository/User'
+import { calculateBalance } from '@/util/validate'
+import { RIGHTS } from '@/auth/RIGHTS'
+import { randomBytes } from 'crypto'
+import { User } from '@model/User'
+import { calculateDecay } from '@/util/decay'
+
+// TODO: do not export, test it inside the resolver
+export const transactionLinkCode = (date: Date): string => {
+  const time = date.getTime().toString(16)
+  return (
+    randomBytes(12)
+      .toString('hex')
+      .substring(0, 24 - time.length) + time
+  )
+}
+
+const CODE_VALID_DAYS_DURATION = 14
+
+const transactionLinkExpireDate = (date: Date): Date => {
+  const validUntil = new Date(date)
+  return new Date(validUntil.setDate(date.getDate() + CODE_VALID_DAYS_DURATION))
+}
+
+@Resolver()
+export class TransactionLinkResolver {
+  @Authorized([RIGHTS.CREATE_TRANSACTION_LINK])
+  @Mutation(() => TransactionLink)
+  async createTransactionLink(
+    @Args() { amount, memo, showEmail = false }: TransactionLinkArgs,
+    @Ctx() context: any,
+  ): Promise<TransactionLink> {
+    const userRepository = getCustomRepository(UserRepository)
+    const user = await userRepository.findByPubkeyHex(context.pubKey)
+
+    const createdDate = new Date()
+    const validUntil = transactionLinkExpireDate(createdDate)
+
+    const holdAvailableAmount = amount.minus(calculateDecay(amount, createdDate, validUntil).decay)
+
+    // validate amount
+    const sendBalance = await calculateBalance(user.id, holdAvailableAmount.mul(-1), createdDate)
+    if (!sendBalance) {
+      throw new Error("user hasn't enough GDD or amount is < 0")
+    }
+
+    const transactionLink = dbTransactionLink.create()
+    transactionLink.userId = user.id
+    transactionLink.amount = amount
+    transactionLink.memo = memo
+    transactionLink.holdAvailableAmount = holdAvailableAmount
+    transactionLink.code = transactionLinkCode(createdDate)
+    transactionLink.createdAt = createdDate
+    transactionLink.validUntil = validUntil
+    transactionLink.showEmail = showEmail
+    await dbTransactionLink.save(transactionLink).catch(() => {
+      throw new Error('Unable to save transaction link')
+    })
+
+    return new TransactionLink(transactionLink, new User(user))
+  }
+}

backend/src/graphql/resolver/TransactionResolver.ts

@@ -19,6 +19,7 @@ import { Order } from '@enum/Order'
 
 import { UserRepository } from '@repository/User'
 import { TransactionRepository } from '@repository/Transaction'
+import { TransactionLinkRepository } from '@repository/TransactionLink'
 
 import { User as dbUser } from '@entity/User'
 import { Transaction as dbTransaction } from '@entity/Transaction'
@@ -127,9 +128,14 @@ export class TransactionResolver {
       transactions.push(new Transaction(userTransaction, self, linkedUser))
     })
 
+    const transactionLinkRepository = getCustomRepository(TransactionLinkRepository)
+    const toHoldAvailable = await transactionLinkRepository.sumAmountToHoldAvailable(user.id, now)
+
     // Construct Result
     return new TransactionList(
-      calculateDecay(lastTransaction.balance, lastTransaction.balanceDate, now).balance,
+      calculateDecay(lastTransaction.balance, lastTransaction.balanceDate, now).balance.minus(
+        toHoldAvailable.toString(),
+      ),
       transactions,
       userTransactionsCount,
       balanceGDT,

backend/src/typeorm/repository/TransactionLink.ts

@@ -0,0 +1,16 @@
+import { Repository, EntityRepository } from '@dbTools/typeorm'
+import { TransactionLink as dbTransactionLink } from '@entity/TransactionLink'
+import Decimal from 'decimal.js-light'
+
+@EntityRepository(dbTransactionLink)
+export class TransactionLinkRepository extends Repository<dbTransactionLink> {
+  async sumAmountToHoldAvailable(userId: number, date: Date): Promise<Decimal> {
+    const { sum } = await this.createQueryBuilder('transactionLinks')
+      .select('SUM(transactionLinks.holdAvailableAmount)', 'sum')
+      .where('transactionLinks.userId = :userId', { userId })
+      .andWhere('transactionLinks.redeemedAt is NULL')
+      .andWhere('transactionLinks.validUntil > :date', { date })
+      .getRawOne()
+    return sum ? new Decimal(sum) : new Decimal(0)
+  }
+}

backend/src/util/validate.ts

@@ -2,6 +2,8 @@ import { calculateDecay } from './decay'
 import Decimal from 'decimal.js-light'
 import { Transaction } from '@entity/Transaction'
 import { Decay } from '@model/Decay'
+import { getCustomRepository } from '@dbTools/typeorm'
+import { TransactionLinkRepository } from '@repository/TransactionLink'
 
 function isStringBoolean(value: string): boolean {
   const lowerValue = value.toLowerCase()
@@ -24,9 +26,13 @@ async function calculateBalance(
   if (!lastTransaction) return null
 
   const decay = calculateDecay(lastTransaction.balance, lastTransaction.balanceDate, time)
+
   // TODO why we have to use toString() here?
   const balance = decay.balance.add(amount.toString())
-  if (balance.lessThan(0)) {
+  const transactionLinkRepository = getCustomRepository(TransactionLinkRepository)
+  const toHoldAvailable = await transactionLinkRepository.sumAmountToHoldAvailable(userId, time)
+
+  if (balance.minus(toHoldAvailable.toString()).lessThan(0)) {
     return null
   }
   return { balance, lastTransactionId: lastTransaction.id, decay }

database/entity/0030-transaction_link/TransactionLink.ts

@@ -42,7 +42,7 @@ export class TransactionLink extends BaseEntity {
   createdAt: Date
 
   @DeleteDateColumn()
-  deletedAt?: Date | null
+  deletedAt: Date | null
 
   @Column({
     type: 'datetime',
@@ -61,8 +61,8 @@ export class TransactionLink extends BaseEntity {
     type: 'datetime',
     nullable: true,
   })
-  redeemedAt?: Date | null
+  redeemedAt: Date | null
 
   @Column({ type: 'int', unsigned: true, nullable: true })
-  redeemedBy?: number | null
+  redeemedBy: number | null
 }