65 lines
2.0 KiB
Elixir
65 lines
2.0 KiB
Elixir
defmodule NeonVertigoService.MessageProcessor do
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alias NeonVertigoService.Repo
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import Ecto.Query, only: [from: 2]
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def process_message(mqtt_pid, {"auctions", "created"}, payload, properties) do
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changeset = Auction.changeset(%Auction{}, payload)
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reply = case Repo.insert(changeset) do
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{:ok, auction} ->
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%{ok: true, gid: auction.gid}
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{:error, changeset} ->
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%{ok: false, gid: changeset |> Ecto.Changeset.get_field(:gid)}
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end
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reply(reply, mqtt_pid, properties, [qos: 2])
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end
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def process_message(mqtt_pid, {"auctions", auction_gid, "bid"}, payload, properties) do
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auction = Repo.get(Auction, auction_gid)
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if is_nil(auction) do
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{:not_found, auction_gid}
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else
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changeset = Bid.changeset(%Bid{}, Map.put(payload, "auction_gid", auction.gid))
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reply = case Repo.insert(changeset) do
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{:ok, bid} ->
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bid_data = %{
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bid: bid.bid,
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bidder_gid: bid.bidder_gid,
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timestamp: bid.bid_timestamp
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}
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send_mqtt(bid_data, mqtt_pid, "notify/new_bid/#{auction.gid}", qos: 2)
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%{ok: true}
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{:error, changeset} -> %{ok: false}
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end
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reply(reply, mqtt_pid, properties)
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end
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end
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def process_message(_, _, _, _) do
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{:ok, :unknown_message}
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end
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defp reply(data, mqtt_pid, orig_properties, message_properties \\ []) do
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response_topic = orig_properties[:"Response-Topic"]
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if is_nil(response_topic) do
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{:ok, :no_response_topic}
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else
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send_mqtt(data, mqtt_pid, response_topic, message_properties)
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end
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end
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defp send_mqtt(data, mqtt_pid, response_topic, message_properties \\ [])
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defp send_mqtt(data, mqtt_pid, response_topic, message_properties) when is_binary(response_topic) and byte_size(response_topic) > 0 do
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if String.valid?(response_topic) && String.length(response_topic) > 0 do
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:emqtt.publish(mqtt_pid, response_topic, JSON.encode!(data), message_properties)
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else
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{:error, :invalid_topic}
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end
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end
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defp send_mqtt(_, _, _, _), do: {:error, :invalid_topic}
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end
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