Added Ui Loop, Error check for user input and test for the above

Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java

@@ -1,29 +1,211 @@
 package de.hs_mannheim.informatik.spreadsheet;
 
 import java.io.FileNotFoundException;
+import java.util.Scanner;
 
 /**
  * Part of a simplified spreadsheet system for the PR1 programming lab at Hochschule Mannheim.
  *
- * @author  Oliver Hummel
+ * @author  Oliver Hummel & Victor Waitz
  */
 public class Axel {
+	static Scanner keyboard = new Scanner(System.in);
+	static Spreadsheet spr = new Spreadsheet(6,8);
 
 	public static void main(String[] args) throws FileNotFoundException {
-		Spreadsheet spr = new Spreadsheet(10,10);
+		// Spreadsheet spr = new Spreadsheet(6,9);
+
 
 		spr.put("A3", "123");
 		spr.put("A2", "1");
 		
-		spr.put("B9", "=41+A2");
+		spr.put("B4", "=41+A2");
-		spr.put("J5", "=7*6");
+		spr.put("C5", "=7*6");
-		spr.put("J6", "=3/2");
+		spr.put("D1", "=3/2");
 		
 		System.out.println(spr);
 		
-		spr.saveCsv("/tmp/test.csv");
+		// spr.saveCsv("/tmp/test.csv");
 		
-		// TODO: You might want to put "UI loop" for entering value and formulas here resp. in some UI methods.
+		// DONE: You might want to put "UI loop" for entering value and formulas here resp. in some UI methods.
+		// TODO ME: Implement program commands
+		System.out.println("Welcome to Axel (Totally not Excel)");
+		System.out.println();
+
+		while(true) {
+			String userCommandPositionInput = userCommandPositionInput();
+			if (userCommandPositionInput.charAt(0) == '*'){
+				executeCommand(userCommandPositionInput);
+				continue;
+			}
+			String userPositionInput = userCommandPositionInput;
+
+			String userValueFormulaInput = userValueFormulaInput();
+
+			spr.put(userPositionInput, userValueFormulaInput);
+
+			System.out.println(spr);
 		}
 
 	}
+
+
+	//? User input for a program command or a position
+	public static String userCommandPositionInput(){
+		System.out.println();
+		System.out.println("Input a command for the program or a position");
+		System.out.printf("List of program commands: *exit, *save, *load or *help %nFormat for position: A1 or B14%n");
+		System.out.print("Input: ");
+		String userCommandPositionInput = keyboard.nextLine();
+
+		return userCommandPositionComputation(userCommandPositionInput);
+	}
+
+	public static String userCommandPositionComputation(String userCommandPositionInput){
+
+		if (userCommandPositionInput.isEmpty()){
+			System.out.println("Input is empty!");
+			return userCommandPositionInput();
+		}
+
+		//? Program command
+		if (userCommandPositionInput.charAt(0) == '*'){
+			if (!(userCommandErrorCheck(userCommandPositionInput))) {
+				System.out.println("Invalid command!");
+				return userCommandPositionInput();
+			}
+			return userCommandPositionInput;
+		}
+
+		//? Position
+		if (!(userPositionErrorCheck(userCommandPositionInput))){
+			System.out.println("Invalid position!");
+			return userCommandPositionInput();
+		}
+
+		if (!(userPositionBoundsErrorCheck(userCommandPositionInput, spr))){
+			System.out.println("Position out of bounds!");
+			return userCommandPositionInput();
+		}
+
+		return userCommandPositionInput;
+	}
+
+	public static boolean userCommandErrorCheck(String CommandToCheck){
+		//? true if valid
+		//? valid inputs are: *exit, *save, *load, *help (and all upper case variants)
+
+		CommandToCheck = CommandToCheck.toLowerCase();
+		if (CommandToCheck.equals("*exit") || CommandToCheck.equals("*save") || CommandToCheck.equals("*load") || CommandToCheck.equals("*help")){
+			return true;
+		}
+		return false;
+	}
+
+	public static boolean userPositionErrorCheck(String positionToCheck){
+		//? true if valid
+		//? valid inputs are: A1, B14, C79, E99, F1, G99, J1, M98, ... (and all lower case variants)
+
+		positionToCheck = positionToCheck.toUpperCase();
+
+		//? Check if input is the right length
+		if (positionToCheck.length() < 2 || positionToCheck.length() > 3){
+			return false;
+		}
+
+		//? Check if input is in the right format
+		if (!(Character.isLetter(positionToCheck.charAt(0)) && Character.isDigit(positionToCheck.charAt(1)))){
+			return false;
+		}
+
+		if (positionToCheck.length() == 3){
+			if (!(Character.isDigit(positionToCheck.charAt(2)))){
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+    public static boolean userPositionBoundsErrorCheck(String positionToCheck, Spreadsheet spr){
+		//? true if valid
+
+		positionToCheck = positionToCheck.toUpperCase();
+
+		if ((spr.getRow(positionToCheck) >= spr.getRowsLCount()) || (spr.getCol(positionToCheck) >= spr.getColsCount())) {
+			return false;
+		}
+
+		return true;
+	}
+
+	//? User input for a value or a formula
+	public static String userValueFormulaInput(){
+		System.out.println();
+		System.out.printf("Input a value of a formula for the selected position.%n");
+		System.out.printf("Format for a value: 7 or 1337 %nFormat for a formula: =7*6 or =SUM(A1:A3)%n");
+		System.out.print("Input: ");
+		String userCommandInput = keyboard.nextLine();
+
+		return userValueFormulaComputation(userCommandInput);
+	}
+
+	public static String userValueFormulaComputation(String userValueFormulaInput){
+		if (userValueFormulaInput.isEmpty()){
+			System.out.println("Input is empty!");
+			return userValueFormulaInput();
+		}
+
+		//? Formula
+		if (userValueFormulaInput.charAt(0) == '='){
+			if (!(userFormulaErrorCheck(userValueFormulaInput))) {
+				System.out.println("Invalid formula!");
+				return userValueFormulaInput();
+			}
+			return userValueFormulaInput;
+		}
+
+		//? Value
+		if (!(userValueErrorCheck(userValueFormulaInput))){
+			System.out.println("Invalid value!");
+			return userValueFormulaInput();
+		}
+
+		return userValueFormulaInput;
+	}
+
+	public static boolean userFormulaErrorCheck(String formulaToCheck){
+		//? true if valid
+		//? valid inputs are: =7*6, =SUM(A1:A3), =A1, =A1+A2, =A1-A2, ... (and all lower case variants)
+
+		//TODO ME: Formula format check, maybe too much work
+		//TODO ME: Check if formula vars are in bounds
+
+		//? remove '=' at the beginning and make everything upper case
+		formulaToCheck = formulaToCheck.toUpperCase().substring(1);
+
+		if (formulaToCheck.startsWith("SUMME(") || formulaToCheck.startsWith("PRODUKT(") || formulaToCheck.startsWith("MITTELWERT(") || formulaToCheck.startsWith("STABW(") || formulaToCheck.startsWith("MIN(") || formulaToCheck.startsWith("MAX(")){
+			return true;
+		}
+
+		return true;
+	}
+
+	public static boolean userValueErrorCheck(String valueToCheck){
+		//? true if valid
+		//? valid inputs are: 7, 1337, 0, ...
+
+		String digitCheckRegex = "-?\\d+(\\.\\d+)?";
+		if (!(valueToCheck.matches(digitCheckRegex))){
+			return false;
+		}
+
+		return true;
+	}
+
+
+	public static void executeCommand(String command) {
+		System.out.printf("Executing command: %s%n", command);
+		//TODO ME:
+	}
+}

Axel/src/de/hs_mannheim/informatik/spreadsheet/Cell.java

@@ -4,7 +4,7 @@ package de.hs_mannheim.informatik.spreadsheet;
  * Part of a simplified spreadsheet system for the PR1 programming lab at Hochschule Mannheim.
  * A cell needs to be able to hold a formula and a value 
  *
- * @author  Oliver Hummel
+ * @author  Oliver Hummel & Victor Waitz
  */
 public class Cell {
     private String formula = "";

Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java

@@ -10,7 +10,7 @@ import java.util.regex.Pattern;
  * A simplified spreadsheet class for the PR1 programming lab at Hochschule Mannheim.
  * One aspect worth mentioning is that it only supports long numbers, not doubles.
  *
- * @author  Oliver Hummel
+ * @author  Oliver Hummel & Victor Waitz
  */
 public class Spreadsheet {
 	Cell[][] cells;
@@ -57,18 +57,19 @@ public class Spreadsheet {
 		put(getRow(cellName), getCol(cellName), value);
 	}
 
-	private int getCol(String cellName) {
+	public int getCol(String cellName) {
 		return cellName.charAt(0) - 'A';
 	}
 
-	private int getRow(String cellName) {
+	public int getRow(String cellName) {
+		//TODO ME: Implement row numbers with two digits
 		return cellName.charAt(1) - '1';
 	}
 
 	// -----
 	// business logic
 
-	/**
+	/*
 	 * A method for reading in data from a CSV file.
 	 * @param path The file to read.
 	 * @param separator The char used to split up the input, e.g. a comma or a semicolon.
@@ -80,7 +81,7 @@ public class Spreadsheet {
 		// TODO: implement this
 	}
 
-	/**
+	/*
 	 * A method for saving data to a CSV file.
 	 * @param path The file to write.
 	 * @return Nothing.
@@ -105,27 +106,34 @@ public class Spreadsheet {
 		out.close();
 	}
 
-	/**
+	/*
 	 * This method does the actual evaluation/calcluation of a specific cell
 	 * @param cellName the name of the cell to be evaluated
 	 * @return Nothing.
 	 */
+
 	private void evaluateCell(int row, int col) {
 		String formula = cells[row][col].getFormula();
 		String result = "";
 
 		if (formula.startsWith("SUMME("))  // e.g. SUMME(A3:A8)
 			result = "" + sum(formula.substring(6, 8), formula.substring(9, 11));  // TODO adapt to cells with two digits
+
 		else if (formula.startsWith("PRODUKT("))  // e.g. PRODUKT(A3:B9)
 			result = "TODO"; // TODO
+
 		else if (formula.startsWith("MITTELWERT("))  // e.g. MITTELWERT(A3:A5)
 			result = "TODO"; // TODO
+
 		else if (formula.startsWith("STABW("))  // e.g. STABW(C6:D8) -> Standardabweichung
 			result = "TODO"; // TODO
+
 		else if (formula.startsWith("MIN("))  // e.g. MIN(C13:H13) -> größter Wert
 			result = "TODO"; // TODO
+
 		else if (formula.startsWith("MAX("))  // e.g. MAX(A1:A10) -> Standardabweichung
 			result = "TODO"; // TODO
+
 		else if (!formula.isEmpty()) {
 			try {
 				result = "" + calculate(formula);
@@ -137,7 +145,7 @@ public class Spreadsheet {
 		cells[row][col].setValue("" + result);
 	}
 
-	/**
+	/*
 	 * Method for calculating the sum of a rectangular block of cells, such as from A1 to B3.
 	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
 	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
@@ -149,7 +157,7 @@ public class Spreadsheet {
 		return 0;
 	}
 
-	/**
+	/*
 	 * This method calculates the result of a "normal" algebraic expression. It only needs to support
 	 * expressions like =B4 or =2+A3-B2, i.e. only with int numbers and other cells and with plus,
 	 * minus, times, split only. An expression always starts with either a number or a cell name. If it 
@@ -178,11 +186,20 @@ public class Spreadsheet {
 
 	// -----
 
+	public int getRowsLCount() {
+		return cells.length;
+	}
+
+	public int getColsCount() {
+		return cells[0].length;
+	}
+
+
 	public String toString() {
 		StringBuilder sb = new StringBuilder();
 
 		sb.append("    ");
-		for (int i = 0; i < cells.length; i++) {
+		for (int i = 0; i < cells[0].length; i++) {
 			sb.append("  " + (char)('A'+ i) + "  | ");
 		}
 
@@ -198,5 +215,4 @@ public class Spreadsheet {
 		}
 		return sb.toString();
 	}
-
 }

Axel/tests/de/hs_mannheim/informatik/spreadsheet/AxelTest.java

@@ -0,0 +1,83 @@
+package de.hs_mannheim.informatik.spreadsheet;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class AxelTest {
+
+    @org.junit.jupiter.api.Test
+    @org.junit.jupiter.api.DisplayName("User command or position input")
+    void userCommandPositionComputation() {
+    }
+
+    @org.junit.jupiter.api.Test
+    @org.junit.jupiter.api.DisplayName("Command input error check")
+    void userCommandErrorCheck() {
+        String[] successTestList = {"*exit", "*save", "*load", "*help", "*eXiT", "*SAVE", "*LoAd", "*hElP"};
+        String[] failureTestList = {"exit", "save", "load", "help", "eXiT", "SAVE", "LoAd", "hElP", "*exit*", "*save*", "*load*", "*help*", "*eXiT*", "*SAVE*", "*LoAd*", "*hElP*", "*test", "*TEST", "*saev", "*xeit"};
+
+        for (String successTest : successTestList) {
+            assertTrue(Axel.userCommandErrorCheck(successTest));
+        }
+
+        for (String failureTest : failureTestList) {
+            assertFalse(Axel.userCommandErrorCheck(failureTest));
+        }
+    }
+
+
+    @org.junit.jupiter.api.Test
+    @org.junit.jupiter.api.DisplayName("Position input error check")
+    void userPositionErrorCheck() {
+        //? Overall format test
+        String[] successTestList = {"A1", "B14", "C79", "E99", "F1", "G99", "J1", "M98", "N67", "o45", "p23", "q12", "r2"};
+        String[] failureTestList = {"A100", "Z101", "AA1", "AB2", "ZZ1", "A1A", "FHT", "AAA", "G3U", "ZZZ", "2A", "47H", "AAAA", "test", "TEST", "save", "*save", "*exit"};
+
+        for (String successTest : successTestList) {
+            assertTrue(Axel.userPositionErrorCheck(successTest));
+        }
+
+        for (String failureTest : failureTestList) {
+            assertFalse(Axel.userPositionErrorCheck(failureTest));
+        }
+
+        //? Out of bounds test
+        Spreadsheet testSpr = new Spreadsheet(6,8);
+
+        String[] successBoundsTest = {"A1", "a1", "b3", "c5", "A3", "H6", "h6"};
+        String[] failureBoundsTest = {"i2", "J6", "B7", "K9", "Z99"};
+
+        for (String successTest : successBoundsTest) {
+            assertTrue(Axel.userPositionBoundsErrorCheck(successTest, testSpr));
+        }
+
+        for (String failureTest : failureBoundsTest) {
+            assertFalse(Axel.userPositionBoundsErrorCheck(failureTest, testSpr));
+        }
+
+    }
+
+    @org.junit.jupiter.api.Test
+    @org.junit.jupiter.api.DisplayName("User value or formula input")
+    void userValueFormulaComputation() {
+    }
+
+    @org.junit.jupiter.api.Test
+    @org.junit.jupiter.api.DisplayName("Value input error check")
+    void userValueErrorCheck() {
+        String[] successTestList = {"0", "1", "-1", "1234", "4324", "-465"};
+        String[] failureTestList = {"a", "aa", "A!", "A1", "wef", "-a", "a-","-1a"};
+
+        for (String successTest : successTestList) {
+            assertTrue(Axel.userValueErrorCheck(successTest));
+        }
+
+        for (String failureTest : failureTestList) {
+            assertFalse(Axel.userValueErrorCheck(failureTest));
+        }
+    }
+
+    @org.junit.jupiter.api.Test
+    @org.junit.jupiter.api.DisplayName("Formula input error check")
+    void userFormulaErrorCheck() {
+    }
+}