emit

#!/usr/bin/env bash

set -o errexit

# Emit Sales Order Created event

basepath=messagingrest/v1

qos=0

output=silent # silent or verbose

source ./settings.sh
source ./localutils.sh # getservicekey getval gettoken

# Functions ------------------------------------------------------

_build_payload_sales_order_created() {
  local salesorder=$1
  yq e -j - << EO_SALES_ORDER_CREATED
type: sap.s4.beh.salesorder.v1.SalesOrder.Created.v1
specversion: "1.0"
source: /default/sap.s4.beh/DEVCLNT001
id: $(uuidgen)
time: $(date '+%Y-%m-%dT%H:%M:%SZ')
datacontenttype: application/json
data:
  SalesOrder: "$salesorder"
EO_SALES_ORDER_CREATED
}

_publish_message() {
  local targettype=$1
  local target=$2
  local message=$3
  curl \
    --"$output" \
    --header "Authorization: Bearer $token" \
    --header "x-qos: $qos" \
    --header 'Content-Type: application/json' \
    --request POST \
    --data "$message" \
    "$uri/$basepath/$targettype/$target/messages"
}

publish_message_to_queue() {
  local queue=$1
  local message=$2
  if [[ -z "$queue" ]] || [[ -z "$message" ]]; then
    err Usage: publish_message_to_queue name message
    exit 1
  fi
  log "Publish message to queue $queue"
  _publish_message queues "$queue" "$message"
}

publish_message_to_topic() {
  local topic=$1
  local message=$2
  if [[ -z "$topic" ]] || [[ -z "$message" ]]; then
    err Usage: publish_message_to_topic name message
    exit 1
  fi
  log "Publish message to topic $topic"
  _publish_message topics "$topic" "$message"
}

# MAIN ----------------------------------------------------------------------

# We require a sales order number to be specified, and a fixed topic
# to publish the message.
topic="salesorder%2Fcreated"
salesordernumber=$1

if [[ -z "$salesordernumber" ]]; then
  err "Sales order number must be specified"
  exit 1
fi

# Retrieve service key and parse out relevant sections.
sk=$(getservicekey "$instance" "$servicekey")
messaging=$(getval "$sk" .messaging)
httprest=$(getval "$messaging" '.[] | select(.broker.type == "saprestmgw")')

# Determine API call details for MESSAGING-HTTPREST incl OAuth 2.0 token
uri=$(getval "$httprest" .uri)
oauth=$(getval "$httprest" .oa2)
token=$(gettoken "$oauth")

message=$(_build_payload_sales_order_created "$salesordernumber")
log Publishing sales order created event for "$salesordernumber"
publish_message_to_topic "$topic" "$message"