From 684e47e00c2be1196af16d3fabd538512a8decf5 Mon Sep 17 00:00:00 2001
From: Andrew Lalis <andrewlalisofficial@gmail.com>
Date: Tue, 9 Mar 2021 11:00:24 +0100
Subject: [PATCH] added command pattern for task handling.

---
 .../HumanTaskDistributor.java                 | 13 ++-------
 .../commands/Command.java                     |  6 ++++
 .../commands/PrepareTasksList.java            | 29 +++++++++++++++++++
 3 files changed, 38 insertions(+), 10 deletions(-)
 create mode 100644 src/main/java/nl/andrewlalis/human_task_distributor/commands/Command.java
 create mode 100644 src/main/java/nl/andrewlalis/human_task_distributor/commands/PrepareTasksList.java

diff --git a/src/main/java/nl/andrewlalis/human_task_distributor/HumanTaskDistributor.java b/src/main/java/nl/andrewlalis/human_task_distributor/HumanTaskDistributor.java
index c9694a5..6a9242a 100644
--- a/src/main/java/nl/andrewlalis/human_task_distributor/HumanTaskDistributor.java
+++ b/src/main/java/nl/andrewlalis/human_task_distributor/HumanTaskDistributor.java
@@ -1,5 +1,6 @@
 package nl.andrewlalis.human_task_distributor;
 
+import nl.andrewlalis.human_task_distributor.commands.PrepareTasksList;
 import org.apache.commons.cli.*;
 import org.apache.commons.csv.CSVFormat;
 
@@ -14,21 +15,13 @@ public class HumanTaskDistributor {
 		final Options options = getOptions();
 		CommandLineParser cmdParser = new DefaultParser();
 		try {
+
 			FileParser fileParser = new FileParser();
 			FileWriter fileWriter = new FileWriter();
 			CommandLine cmd = cmdParser.parse(options, args);
 			if (cmd.hasOption("ptl")) {
 				String[] values = cmd.getOptionValues("ptl");
-				if (values.length != 2) {
-					throw new IllegalArgumentException("Expected exactly 2 parameters for ptl arg.");
-				}
-				String filePath = values[0].trim();
-				String regex = values[1].trim();
-				Set<Task> tasks = fileParser.parseTaskList(filePath, regex);
-				System.out.println("Read " + tasks.size() + " tasks from file.");
-				String outFilePath = filePath.replaceFirst("\\..*", ".csv");
-				fileWriter.write(tasks, outFilePath);
-				System.out.println("Wrote tasks to " + outFilePath);
+				new PrepareTasksList().execute(values);
 				return;
 			}
 
diff --git a/src/main/java/nl/andrewlalis/human_task_distributor/commands/Command.java b/src/main/java/nl/andrewlalis/human_task_distributor/commands/Command.java
new file mode 100644
index 0000000..dcaadd8
--- /dev/null
+++ b/src/main/java/nl/andrewlalis/human_task_distributor/commands/Command.java
@@ -0,0 +1,6 @@
+package nl.andrewlalis.human_task_distributor.commands;
+
+public interface Command {
+
+	void execute(String[] args);
+}
diff --git a/src/main/java/nl/andrewlalis/human_task_distributor/commands/PrepareTasksList.java b/src/main/java/nl/andrewlalis/human_task_distributor/commands/PrepareTasksList.java
new file mode 100644
index 0000000..6cdb940
--- /dev/null
+++ b/src/main/java/nl/andrewlalis/human_task_distributor/commands/PrepareTasksList.java
@@ -0,0 +1,29 @@
+package nl.andrewlalis.human_task_distributor.commands;
+
+import nl.andrewlalis.human_task_distributor.FileParser;
+import nl.andrewlalis.human_task_distributor.FileWriter;
+import nl.andrewlalis.human_task_distributor.Task;
+
+import java.io.IOException;
+import java.util.Set;
+
+public class PrepareTasksList implements Command {
+	@Override
+	public void execute(String[] args) {
+		if (args.length != 2) {
+			throw new IllegalArgumentException("Expected exactly 2 parameters for ptl arg.");
+		}
+		String filePath = args[0].trim();
+		String regex = args[1].trim();
+		Set<Task> tasks = new FileParser().parseTaskList(filePath, regex);
+		System.out.println("Read " + tasks.size() + " tasks from file.");
+		String outFilePath = filePath.replaceFirst("\\..*", ".csv");
+		try {
+			new FileWriter().write(tasks, outFilePath);
+			System.out.println("Wrote tasks to " + outFilePath);
+		} catch (IOException e) {
+			e.printStackTrace();
+			System.err.println("Couldn't write output file.");
+		}
+	}
+}