feat(display): enhance display

src/main/java/eirb/pg203/WeatherDisplayBasic.java

@@ -1,6 +1,7 @@
 package eirb.pg203;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 
 class WeatherDisplayBasic implements WeatherDisplay {
 	private ArrayList<WeatherDataAPI> apis;
@@ -9,42 +10,102 @@ class WeatherDisplayBasic implements WeatherDisplay {
 		this.apis = new ArrayList<WeatherDataAPI>();
 	}
 
-	private void displayHeader(int days) {
+	private void displayHeader(int days, double sourceColumnSize, double dayColumnSize) {
         StringBuilder line = new StringBuilder();
 		line.append("Source\t");
+		for (double index = line.length(); index < sourceColumnSize; index++)
+			line.append(" ");
 
 		for (int i = 0 ; i < days ; ++i) {
 			line.append("\tJ + ")
 				.append(i);
+			for (double index = "\tJ + ".length(); index < dayColumnSize; index++)
+				line.append(" ");
 		}
 
-		System.err.println(line);
+		System.out.println(line);
 	}
 
-	private void displayWeatherDatas(String ApiName, ArrayList<WeatherData> weatherDatas) {
+	private double getColumnSize(HashMap<WeatherDataAPI, ArrayList<WeatherData>> weatherDataAPIArrayListHashMap) {
+		double max = 0;
+		for (WeatherDataAPI api: weatherDataAPIArrayListHashMap.keySet()) {
+			for (WeatherData w: weatherDataAPIArrayListHashMap.get(api)){
+				max = Math.max(max, w.toString().length());
+			}
+		}
+		return max;
+	}
+
+	private void displayWeatherDatas(String apiName, ArrayList<WeatherData> weatherDatas, String startColumnString, double sourceColumnSize, double dayColumnSize) {
         StringBuilder line = new StringBuilder();
-		line.append(ApiName);
+		String weatherDataString;
+		line.append(apiName);
+		for (double index = apiName.length(); index < sourceColumnSize; index++)
+			line.append(" ");
 
 		for (WeatherData weatherData: weatherDatas) {
-			line.append('\t')
-				.append(weatherData.toString());
+			weatherDataString = weatherData.toString();
+			line.append(startColumnString)
+				.append(weatherDataString);
+			// fill the columns with blanks
+			for (double index = weatherDataString.length(); index < dayColumnSize; index++)
+				line.append(" ");
+		}
+		//complete column
+		line.append(startColumnString);
+
+		System.out.println(line);
+	}
+
+
+	private void displaySeparatorLine(int days, double sourceColumnSize, double dayColumnSize) {
+		String mainSeparator = "-";
+		String secondSeparator = "+";
+		StringBuilder line = new StringBuilder();
+		// source Column
+		for (double index = 0; index < sourceColumnSize; index++)
+			line.append(mainSeparator);
+		line.append(secondSeparator);
+		for (int day = 0; day < days; day++){
+			for (double index = 0; index < dayColumnSize; index++)
+				line.append(mainSeparator);
+			line.append(secondSeparator);
+		}
+		System.out.println(line);
+	}
+
+	private void displayAllWeatherDatas(HashMap<WeatherDataAPI, ArrayList<WeatherData>> weatherDataAPIArrayListHashMap, int days) {
+		double dayColumnSize = this.getColumnSize(weatherDataAPIArrayListHashMap);
+
+		// Adjust column size
+		String startColumnString = "| ";
+		dayColumnSize += startColumnString.length();
+
+		double sourceColumnSize = dayColumnSize;
+
+		// Header
+		displayHeader(days, sourceColumnSize, dayColumnSize);
+		this.displaySeparatorLine(days, sourceColumnSize, dayColumnSize);
+
+		// Apis
+		for (WeatherDataAPI api: weatherDataAPIArrayListHashMap.keySet()) {
+			displayWeatherDatas(api.getAPIName(), weatherDataAPIArrayListHashMap.get(api), startColumnString, sourceColumnSize, dayColumnSize);
+			this.displaySeparatorLine(days, sourceColumnSize, dayColumnSize);
 		}
 
-		System.err.println(line);
 	}
 
     public void display(int days, String city) {
-		ArrayList<WeatherData> weatherDatas;
-		displayHeader(days);
+		HashMap<WeatherDataAPI, ArrayList<WeatherData>> weatherDatasMap = new HashMap<>();
 
 		for (WeatherDataAPI w: apis) {
 			try {
-				weatherDatas = w.getTemperatures(days, city);
-				displayWeatherDatas(w.getAPIName(), weatherDatas);
+				weatherDatasMap.put(w, w.getTemperatures(days, city));
 			} catch (Exception e) {
 				System.err.println(e);
 			}
 		}
+		this.displayAllWeatherDatas(weatherDatasMap, days);
 	}
 
 	public void addAPI(WeatherDataAPI w) {