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functions.go
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functions.go
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package main
import (
"context"
"fmt"
"time"
"github.com/project-flogo/rules/examples/ordermanagement/audittrail"
"github.com/project-flogo/core/support/log"
"github.com/project-flogo/rules/common/model"
"github.com/project-flogo/rules/config"
)
func init() {
//rule orderevent, handle a order event, create a order in the orderAction
config.RegisterConditionEvaluator("truecondition", truecondition)
config.RegisterActionFunction("ordereventAction", ordereventAction)
//rule itemevent, handle a item event, update order in the itemeventAction
config.RegisterConditionEvaluator("itemeventCondition", itemeventCondition)
config.RegisterActionFunction("itemeventAction", itemeventAction)
//rule order
config.RegisterConditionEvaluator("orderCondition", orderCondition)
config.RegisterActionFunction("orderAction", orderAction)
//rule ordertimeoutevent, order timeout if within a specified interval, all order items dont arrive
config.RegisterConditionEvaluator("ordertimeouteventCondition", ordertimeouteventCondition)
config.RegisterActionFunction("ordertimeouteventAction", ordertimeouteventAction)
//rule ordershippedevent
config.RegisterConditionEvaluator("ordershippedCondition", ordershippedCondition)
config.RegisterActionFunction("ordershippedAction", ordershippedAction)
//rule ordercancelled, notification on order cancelled
config.RegisterConditionEvaluator("ordercancelledCondition", ordercancelledCondition)
config.RegisterActionFunction("ordercancelledAction", ordercancelledAction)
//rule shippingtimeoutevent, shipping timeout if within a specified interval, order is not shipped
config.RegisterConditionEvaluator("shippingtimeouteventCondition", shippingtimeouteventCondition)
config.RegisterActionFunction("shippingtimeouteventAction", shippingtimeouteventAction)
//rule orderinvoice, apply discounts based on the customer level on hte final invoice
config.RegisterConditionEvaluator("orderinvoiceCondition", orderinvoiceCondition)
config.RegisterActionFunction("orderinvoiceAction", orderinvoiceAction)
}
func truecondition(ruleName string, condName string, tuples map[model.TupleType]model.Tuple, ctx model.RuleContext) bool {
return true
}
func ordereventAction(ctx context.Context, rs model.RuleSession, ruleName string, tuples map[model.TupleType]model.Tuple, ruleCtx model.RuleContext) {
orderEvent := tuples["orderevent"]
orderID, _ := orderEvent.GetString("orderId")
totalItems, _ := orderEvent.GetInt("totalItems")
level, _ := orderEvent.GetString("level")
itemTimeout, _ := orderEvent.GetInt("itemTimeout")
shippingTimeout, _ := orderEvent.GetInt("shippingTimeout")
log.RootLogger().Infof("Received a new order, processing order with id[%s]", orderID)
//assert a order
order, _ := model.NewTupleWithKeyValues(model.TupleType("order"), orderID)
order.SetInt(ctx, "expectedItems", totalItems)
order.SetString(ctx, "level", level)
order.SetInt(ctx, "receivedItems", 0)
order.SetString(ctx, "status", "created")
order.SetInt(ctx, "shippingTimeout", shippingTimeout)
order.SetDouble(ctx, "invoice", 0)
if itemTimeout > 0 {
orderTimeout, _ := model.NewTupleWithKeyValues(model.TupleType("ordertimeoutevent"), orderID)
rs.ScheduleAssert(ctx, uint64(1000*itemTimeout), orderID, orderTimeout)
}
rs.Assert(ctx, order)
audittrail.PublishAuditTrailItem(*awsStreamName, orderID, "created", ruleName, fmt.Sprintf("Order[%s] created", orderID))
if itemTimeout > 0 {
audittrail.PublishAuditTrailItem(*awsStreamName, orderID, "created", ruleName, fmt.Sprintf("Item timeout set to [%d]ms from now[%s]", itemTimeout, time.Now().Format("2006-01-02 15:04:05")))
}
}
func itemeventCondition(ruleName string, condName string, tuples map[model.TupleType]model.Tuple, ctx model.RuleContext) bool {
itemEvent := tuples["itemevent"]
itemOrderID, _ := itemEvent.GetString("orderId")
itemType, _ := itemEvent.GetString("type")
itemQty, _ := itemEvent.GetInt("quantity")
order := tuples["order"]
orderID, _ := order.GetString("orderId")
orderStatus, _ := order.GetString("status")
currentQty := itemInventory[itemType]
return itemOrderID == orderID && itemQty <= currentQty.quantity && orderStatus == "created"
}
func itemeventAction(ctx context.Context, rs model.RuleSession, ruleName string, tuples map[model.TupleType]model.Tuple, ruleCtx model.RuleContext) {
itemEvent := tuples["itemevent"]
itemID, _ := itemEvent.GetString("itemId")
itemType, _ := itemEvent.GetString("type")
itemQty, _ := itemEvent.GetInt("quantity")
order := tuples["order"].(model.MutableTuple)
orderID, _ := order.GetString("orderId")
existingReceivedItems, _ := order.GetInt("receivedItems")
order.SetInt(ctx, "receivedItems", existingReceivedItems+1)
currentItem := itemInventory[itemType]
currentItem.quantity = currentItem.quantity - itemQty
invoice, _ := order.GetDouble("invoice")
order.SetDouble(ctx, "invoice", invoice+(float64(itemQty)*currentItem.pricePerItem))
log.RootLogger().Infof("Received a new item id[%s] of type[%s] for order id[%s]", itemID, itemType, orderID)
audittrail.PublishAuditTrailItem(*awsStreamName, orderID, "created", ruleName, fmt.Sprintf("Item[%s] received", itemID))
}
func orderCondition(ruleName string, condName string, tuples map[model.TupleType]model.Tuple, ctx model.RuleContext) bool {
order := tuples["order"]
expectedItems, _ := order.GetInt("expectedItems")
receivedItems, _ := order.GetInt("receivedItems")
orderStatus, _ := order.GetString("status")
return expectedItems == receivedItems && orderStatus == "created"
}
func orderAction(ctx context.Context, rs model.RuleSession, ruleName string, tuples map[model.TupleType]model.Tuple, ruleCtx model.RuleContext) {
order := tuples["order"].(model.MutableTuple)
receivedItems, _ := order.GetInt("receivedItems")
orderID, _ := order.GetString("orderId")
log.RootLogger().Infof("Received a all items[%d] for order id[%s]. Handing over to shipping", receivedItems, orderID)
rs.CancelScheduledAssert(ctx, orderID)
order.SetString(ctx, "status", "inshipping")
shippingTimeout, _ := order.GetInt("shippingTimeout")
if shippingTimeout > 0 {
shipping, _ := model.NewTupleWithKeyValues(model.TupleType("shippingtimeoutevent"), orderID)
rs.ScheduleAssert(ctx, uint64(1000*shippingTimeout), "shipping_"+orderID, shipping)
}
audittrail.PublishAuditTrailItem(*awsStreamName, orderID, "inshipping", ruleName, fmt.Sprintf("Received all items[%d] received", receivedItems))
if shippingTimeout > 0 {
audittrail.PublishAuditTrailItem(*awsStreamName, orderID, "inshipping", ruleName, fmt.Sprintf("Shipping timeout set to [%d]ms from now[%s]", shippingTimeout, time.Now().Format("2006-01-02 15:04:05")))
}
}
func ordertimeouteventCondition(ruleName string, condName string, tuples map[model.TupleType]model.Tuple, ctx model.RuleContext) bool {
ordertimeout := tuples["ordertimeoutevent"]
timeoutOrderID, _ := ordertimeout.GetString("orderId")
order := tuples["order"]
orderID, _ := order.GetString("orderId")
orderStatus, _ := order.GetString("status")
return timeoutOrderID == orderID && orderStatus == "created"
}
func ordertimeouteventAction(ctx context.Context, rs model.RuleSession, ruleName string, tuples map[model.TupleType]model.Tuple, ruleCtx model.RuleContext) {
order := tuples["order"].(model.MutableTuple)
orderID, _ := order.GetString("orderId")
expectedItems, _ := order.GetInt("expectedItems")
receivedItems, _ := order.GetInt("receivedItems")
log.RootLogger().Infof("Order[%s] timed out, received only [%d] order items, expected [%d] items. Cancelling Order !!", orderID, receivedItems, expectedItems)
order.SetString(ctx, "status", "cancelled")
order.SetString(ctx, "statusMessage", fmt.Sprintf("Received only [%d] order items, expected [%d] items", receivedItems, expectedItems))
audittrail.PublishAuditTrailItem(*awsStreamName, orderID, "cancelled", ruleName, fmt.Sprintf("Order[%s] timed out", orderID))
}
func ordershippedCondition(ruleName string, condName string, tuples map[model.TupleType]model.Tuple, ctx model.RuleContext) bool {
ordershippedevent := tuples["ordershippedevent"]
ordershippedeventorderID, _ := ordershippedevent.GetString("orderId")
order := tuples["order"]
orderID, _ := order.GetString("orderId")
orderStatus, _ := order.GetString("status")
return orderStatus == "inshipping" && orderID == ordershippedeventorderID
}
func ordershippedAction(ctx context.Context, rs model.RuleSession, ruleName string, tuples map[model.TupleType]model.Tuple, ruleCtx model.RuleContext) {
order := tuples["order"].(model.MutableTuple)
orderID, _ := order.GetString("orderId")
order.SetString(ctx, "status", "shipped")
rs.CancelScheduledAssert(ctx, "shipping_"+orderID)
log.RootLogger().Infof("Order[%s] has been shipped", orderID)
audittrail.PublishAuditTrailItem(*awsStreamName, orderID, "shipped", ruleName, fmt.Sprintf("Order[%s] shipped", orderID))
}
func ordercancelledCondition(ruleName string, condName string, tuples map[model.TupleType]model.Tuple, ctx model.RuleContext) bool {
order := tuples["order"].(model.MutableTuple)
status, _ := order.GetString("status")
return status == "cancelled"
}
func ordercancelledAction(ctx context.Context, rs model.RuleSession, ruleName string, tuples map[model.TupleType]model.Tuple, ruleCtx model.RuleContext) {
order := tuples["order"].(model.MutableTuple)
orderID, _ := order.GetString("orderId")
orderMessage, _ := order.GetString("statusMessage")
log.RootLogger().Infof("Order id[%s] has been cancelled. Reason - %s", orderID, orderMessage)
rs.Retract(ctx, order)
audittrail.PublishAuditTrailItem(*awsStreamName, orderID, "cancelled", ruleName, fmt.Sprintf("Order[%s] has been cancelled. Reason - %s", orderID, orderMessage))
}
func shippingtimeouteventCondition(ruleName string, condName string, tuples map[model.TupleType]model.Tuple, ctx model.RuleContext) bool {
ordertimeout := tuples["shippingtimeoutevent"]
timeoutOrderID, _ := ordertimeout.GetString("orderId")
order := tuples["order"]
orderID, _ := order.GetString("orderId")
status, _ := order.GetString("status")
return timeoutOrderID == orderID && status == "inshipping"
}
func shippingtimeouteventAction(ctx context.Context, rs model.RuleSession, ruleName string, tuples map[model.TupleType]model.Tuple, ruleCtx model.RuleContext) {
order := tuples["order"].(model.MutableTuple)
orderID, _ := order.GetString("orderId")
log.RootLogger().Infof("Shipping of Order[%s] timed out. Cancelling Order !!", orderID)
order.SetString(ctx, "status", "cancelled")
order.SetString(ctx, "statusMessage", fmt.Sprint("Shipping timed out"))
audittrail.PublishAuditTrailItem(*awsStreamName, orderID, "cancelled", ruleName, fmt.Sprintf("Order[%s] shipping timed out", orderID))
}
func orderinvoiceCondition(ruleName string, condName string, tuples map[model.TupleType]model.Tuple, ctx model.RuleContext) bool {
ordertimeout := tuples["order"]
status, _ := ordertimeout.GetString("status")
return status == "shipped"
}
func orderinvoiceAction(ctx context.Context, rs model.RuleSession, ruleName string, tuples map[model.TupleType]model.Tuple, ruleCtx model.RuleContext) {
order := tuples["order"].(model.MutableTuple)
orderID, _ := order.GetString("orderId")
invoice, _ := order.GetDouble("invoice")
level, _ := order.GetString("level")
discountApplied, ok := levelDiscount[level]
if !ok {
discountApplied = 100
}
discountedInvoice := invoice - ((discountApplied / 100.00) * invoice)
log.RootLogger().Infof("Order [%s] completed. Invoice submitted,\n\tOrginal invoice - $%.2f\n\t'%s' level discount - %.2f%%\n\tFinal invoice - $%.2f", orderID, invoice, level, discountApplied, discountedInvoice)
order.SetString(ctx, "status", "complete")
rs.Retract(ctx, order)
audittrail.PublishAuditTrailItem(*awsStreamName, orderID, "complete", ruleName, fmt.Sprintf("Order[%s] processing completed", orderID))
}