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import * as retry from 'async/retry'
import * as Bluebird from 'bluebird'
import { Model } from 'sequelize-typescript'
import { logger } from './logger'
import { Transaction } from 'sequelize'
function retryTransactionWrapper <T, A, B, C> (
functionToRetry: (arg1: A, arg2: B, arg3: C) => Promise<T> | Bluebird<T>,
arg1: A,
arg2: B,
arg3: C
): Promise<T>
function retryTransactionWrapper <T, A, B> (
functionToRetry: (arg1: A, arg2: B) => Promise<T> | Bluebird<T>,
arg1: A,
arg2: B
): Promise<T>
function retryTransactionWrapper <T, A> (
functionToRetry: (arg1: A) => Promise<T> | Bluebird<T>,
arg1: A
): Promise<T>
function retryTransactionWrapper <T> (
functionToRetry: () => Promise<T> | Bluebird<T>
): Promise<T>
function retryTransactionWrapper <T> (
functionToRetry: (...args: any[]) => Promise<T> | Bluebird<T>,
...args: any[]
): Promise<T> {
return transactionRetryer<T>(callback => {
functionToRetry.apply(null, args)
.then((result: T) => callback(null, result))
.catch(err => callback(err))
})
.catch(err => {
logger.error(`Cannot execute ${functionToRetry.name} with many retries.`, { err })
throw err
})
}
function transactionRetryer <T> (func: (err: any, data: T) => any) {
return new Promise<T>((res, rej) => {
retry(
{
times: 5,
errorFilter: err => {
const willRetry = (err.name === 'SequelizeDatabaseError')
logger.debug('Maybe retrying the transaction function.', { willRetry, err })
return willRetry
}
},
func,
(err, data) => err ? rej(err) : res(data)
)
})
}
function updateInstanceWithAnother <T extends Model<T>> (instanceToUpdate: Model<T>, baseInstance: Model<T>) {
const obj = baseInstance.toJSON()
for (const key of Object.keys(obj)) {
instanceToUpdate[key] = obj[key]
}
}
function resetSequelizeInstance (instance: Model<any>, savedFields: object) {
Object.keys(savedFields).forEach(key => {
instance[key] = savedFields[key]
})
}
function afterCommitIfTransaction (t: Transaction, fn: Function) {
if (t) return t.afterCommit(() => fn())
return fn()
}
function deleteNonExistingModels <T extends { hasSameUniqueKeysThan (other: T): boolean } & Model<T>> (
fromDatabase: T[],
newModels: T[],
t: Transaction
) {
return fromDatabase.filter(f => !newModels.find(newModel => newModel.hasSameUniqueKeysThan(f)))
.map(f => f.destroy({ transaction: t }))
}
// ---------------------------------------------------------------------------
export {
resetSequelizeInstance,
retryTransactionWrapper,
transactionRetryer,
updateInstanceWithAnother,
afterCommitIfTransaction,
deleteNonExistingModels
}
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