public Response vend()

in src/main/java/software/aws/chatops_lex_api/resource/AccountVendor.java [108:161]
43 lines of code
9 McCabe index (conditional complexity)

	public Response vend(String payload) {

		logger.info("JSON: " + payload);
		Gson gson = new Gson();
		@SuppressWarnings("rawtypes")
		Map parameters = gson.fromJson(payload, Map.class);
		String slackChannel = "";
		String text = "";

		Boolean IS_SLACK = Boolean.FALSE;

		if (parameters.containsKey("type") && "url_verification".equals(parameters.get("type").toString())) {
			// this is a slack url callback verification
			Map<String, String> elems = new HashMap<>();
			elems.put("challenge", parameters.get("challenge").toString());
			return Response.status(200).entity(elems).build();

		} else if (parameters.containsKey("type") && "event_callback".equals(parameters.get("type").toString())) {

			logger.info("This is a slack message");
			IS_SLACK = Boolean.TRUE;
			if (!"message"
					.equals(gson.fromJson(payload, JsonObject.class).getAsJsonObject("event").get("type").getAsString())) {
				logger.info("I'm not interested in this event type from slack.");
				return Response.status(200).build();
			}

			text = gson.fromJson(payload, JsonObject.class).getAsJsonObject("event").get("text").getAsString();
			slackChannel = gson.fromJson(payload, JsonObject.class).getAsJsonObject("event").get("channel").getAsString();
			try{
				Util.getUserInfoSlack(parameters, text, payload, gson);
			}catch(Exception e){
				logger.info("We could not find the slack username info who is requesting a new account. Message: "+ e.getMessage());
				return Response.status(200).entity("I'm taking a nap now. Please come back in 10 minutes.").build();
			}
		}

		logger.info("UserName: " + parameters.get("UserEmail"));
		if (!parameters.containsKey("UserEmail") || !parameters.containsKey("UserName") || !parameters.containsKey("UserLastname")) {
			throw new WebApplicationException(Response.status(Response.Status.INTERNAL_SERVER_ERROR)
					.entity("JSON inside the body must have these elements: UserEmail, UserName and UserLastname")
					.build());
		}

		Map<String, String> sessionAttributes = new HashMap<>();
		sessionAttributes.putAll(parameters);
		
		String returnMessage = Util.postLex(sessionAttributes, IS_SLACK, slackChannel);

		Map<String, String> elems = new HashMap<>();
		elems.put("initial-params", payload);
		elems.put("response", returnMessage);
		return Response.status(200).entity(elems).build();
	}