feat: add argument parsing

src/main/java/eirb/pg203/Main.java

@@ -1,9 +1,61 @@
 package eirb.pg203;
 
 import java.io.IOException;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
 
 public class Main {
-    public static void main(String[] args) throws IOException {
+	private static class Option {
+		String flag, value;
+		public Option(String flag, String value){
+			this.flag = flag;
+			this.value = value;
+		}
+
+		@Override
+		public String toString() {
+			return flag + ':' + value;
+		}
+
+		public String getFlag() {
+			return flag;
+		}
+
+		public String getValue() {
+			return value;
+		}
+	}
+    public static void main(String[] args) throws IOException, IllegalArgumentException{
+		HashMap<String, Option> options = new HashMap<>();
+		List<String> argsList = new ArrayList<>();
+
+		for (int index = 0; index < args.length; index++) {
+			switch (args[index].charAt(0)) {
+				case '-':
+					if (index + 1 >= args.length)
+						throw new IllegalArgumentException("No arguments provided");
+					String opt = args[index].substring(1);
+					options.put(opt, new Option(opt, args[++index]));
+					break;
+				default:
+					argsList.add(args[index]);
+			}
+		}
+
+		String city;
+		if (!options.containsKey("l"))
+			throw new IllegalArgumentException("No city provided with -l");
+		city = options.get("l").getValue();
+
+		int days = 3;
+		System.out.println(options);
+		if (options.containsKey("d"))
+			days =  Integer.parseInt(options.get("d").getValue());
+
+
+
 		String WeatherAPIKey = "cef8e1b6ea364994b5072423240111";
 		String OpenWMapKey = "5719b35ddcb39846c228ea2e37357464";
 		WeatherAPI weatherAPI = new WeatherAPI(WeatherAPIKey);
@@ -16,6 +68,6 @@ public class Main {
 		display.addAPI(openWeatherMap);
 
 		// weatherAPI can't fetch for more than 3 days with free plan
-		display.display(3, "Bordeaux");
+		display.display(days, city);
     }
 }