144 lines
3.5 KiB
TypeScript
144 lines
3.5 KiB
TypeScript
import { values } from 'lodash'
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import * as Sequelize from 'sequelize'
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import { database as db } from '../../initializers/database'
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import { REQUEST_ENDPOINTS } from '../../initializers'
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import { addMethodsToModel } from '../utils'
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import {
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RequestInstance,
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RequestAttributes,
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RequestMethods,
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RequestsGrouped
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} from './request-interface'
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let Request: Sequelize.Model<RequestInstance, RequestAttributes>
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let countTotalRequests: RequestMethods.CountTotalRequests
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let listWithLimitAndRandom: RequestMethods.ListWithLimitAndRandom
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let removeWithEmptyTo: RequestMethods.RemoveWithEmptyTo
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let removeAll: RequestMethods.RemoveAll
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export default function (sequelize: Sequelize.Sequelize, DataTypes: Sequelize.DataTypes) {
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Request = sequelize.define<RequestInstance, RequestAttributes>('Request',
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{
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request: {
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type: DataTypes.JSON,
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allowNull: false
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},
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endpoint: {
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type: DataTypes.ENUM(values(REQUEST_ENDPOINTS)),
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allowNull: false
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}
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}
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)
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const classMethods = [
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associate,
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listWithLimitAndRandom,
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countTotalRequests,
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removeAll,
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removeWithEmptyTo
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]
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addMethodsToModel(Request, classMethods)
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return Request
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}
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// ------------------------------ STATICS ------------------------------
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function associate (models) {
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Request.belongsToMany(models.Pod, {
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foreignKey: {
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name: 'requestId',
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allowNull: false
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},
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through: models.RequestToPod,
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onDelete: 'CASCADE'
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})
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}
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countTotalRequests = function () {
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// We need to include Pod because there are no cascade delete when a pod is removed
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// So we could count requests that do not have existing pod anymore
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const query = {
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include: [ Request['sequelize'].models.Pod ]
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}
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return Request.count(query)
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}
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listWithLimitAndRandom = function (limitPods: number, limitRequestsPerPod: number) {
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const Pod = db.Pod
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const tableJoin = ''
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return Pod.listRandomPodIdsWithRequest(limitPods, 'RequestToPods', tableJoin).then(podIds => {
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// We don't have friends that have requests
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if (podIds.length === 0) return []
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// The first x requests of these pods
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// It is very important to sort by id ASC to keep the requests order!
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const query = {
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order: [
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[ 'id', 'ASC' ]
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],
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include: [
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{
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model: Request['sequelize'].models.Pod,
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where: {
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id: {
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$in: podIds
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}
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}
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}
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]
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}
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return Request.findAll(query).then(requests => {
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const requestsGrouped = groupAndTruncateRequests(requests, limitRequestsPerPod)
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return requestsGrouped
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})
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})
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}
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removeAll = function () {
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// Delete all requests
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return Request.truncate({ cascade: true })
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}
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removeWithEmptyTo = function () {
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const query = {
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where: {
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id: {
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$notIn: [
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Sequelize.literal('SELECT "requestId" FROM "RequestToPods"')
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]
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}
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}
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}
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return Request.destroy(query)
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}
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// ---------------------------------------------------------------------------
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function groupAndTruncateRequests (requests: RequestInstance[], limitRequestsPerPod: number) {
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const requestsGrouped: RequestsGrouped = {}
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requests.forEach(request => {
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request.Pods.forEach(pod => {
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if (!requestsGrouped[pod.id]) requestsGrouped[pod.id] = []
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if (requestsGrouped[pod.id].length < limitRequestsPerPod) {
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requestsGrouped[pod.id].push({
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request,
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pod
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})
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}
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})
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})
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return requestsGrouped
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}
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