New SlackerBot parser was added, called Fruit Riddle (#453)

* Create FruitRiddle.js

* Update FruitRiddle.js

* Update FruitRiddle.js

* Update FruitRiddle.js

Parsers/FruitRiddle.js

@@ -0,0 +1,195 @@
+/*
+activation_example:!fruit riddle start
+regex:^!fruit riddle.*$
+flags:gmi
+*/
+
+
+/**
+ * Main variable: current, which is a record from the x_snc_slackerbot_chat table
+ * Important attributes:
+ *  - Text (text)
+ *  - User (user)
+ *  - Channel (channel)
+ */
+
+var FruitRiddle = Class.create();
+FruitRiddle.prototype = {
+
+    initialize: function(currentChatContext) {
+
+		// Available commands
+		this.CMD_START = "start";
+		this.CMD_EXIT = "exit";
+		this.CMD_SOLUTION = "solution";
+
+		this.user = currentChatContext.getDisplayValue("user");
+		this.channel = currentChatContext.getValue("channel");
+		this.text = currentChatContext.getValue("text");
+		this.threadTs = currentChatContext.getValue("thread_ts");
+		this.isThread = !gs.nil(this.threadTs); // The current message is in thread or not
+
+		this.fruits = ["apple", "banana", "orange", "mango", "strawberry", "blueberry", "raspberry", "pineapple", "watermelon", "papaya", "kiwi", "peach", "pear", "grape", "cherry", "pomegranate", "lemon", "lime", "coconut", "avocado", "fig", "plum", "nectarine", "apricot", "dragonfruit", "grapefruit", "persimmon", "guava", "jackfruit", "lychee"];
+    },
+
+	/**
+	 * The main logic is handled by this function
+	 */
+	parse: function() {
+
+		// Need to check the text at first
+		// Only the following commands are allowed
+		var textRegex = /^(!fruit riddle|!fruit riddle start|!fruit riddle exit|!fruit riddle solution [a-zA-Z]*|!fruit riddle [a-zA-Z]{4})$/g;
+
+		if (this.text.match(textRegex)) {
+
+			if (this.text == "!fruit riddle" && !this.isThread) {
+				return {
+						thread: this.isThread,
+						message: `This is a simple game, where I think of a fruit, and you have to guess it. You can start the game with the command: 
+
+						!fruit riddle start
+						
+To submit a guess, use the following command: 
+
+						!fruit riddle abcd
+
+If you know the answer, type: 
+
+						!fruit riddle solution fruit
+
+If you want to give up, use the message: 
+
+						!fruit riddle exit
+
+Have fun :smile:`
+					};
+			}
+			else if (this.text == "!fruit riddle" && this.isThread) {
+				return {
+						thread: this.isThread,
+						message: "Please use one of the input commands, such as solve, exit or guess letter"
+					};
+			}
+
+			// Need to get the 3rd word from the command
+			var command = this.text.split(" ")[2];
+
+			if (this.isThread) {
+				// The message is in a thread
+				if (command === this.CMD_START) {
+					return {
+						thread: true,
+						message: "The fruit riddle start command cannot be used in thread."
+					};
+				}
+				else if (command === this.CMD_EXIT) {
+					return {
+						thread: true,
+						message: `😮 
+${this.user}!! So you give up...I wouldn't have thought that about you.`
+					};
+				}
+				else if (command === this.CMD_SOLUTION) {
+
+					var solution = this.text.split(" ")[3];
+					var selectedFruit = this._getRandomFruit();
+
+					if (solution === selectedFruit) {
+						return {
+							thread: true,
+							message: "Exactly! Congratulations! 🥳"
+						};
+					} 
+
+					return {
+						thread: true,
+						message: "Well, you missed it. Try again."
+					};
+				}
+				else {
+					// The letters
+
+					var letters = command.split('');
+					var result = this._revealLetters(this._getRandomFruit(), letters);
+
+					return {
+						thread: true,
+						message: `Here we go:  ${result}`
+					};
+				}
+			}
+			else {
+				// The messasge is not part of a thread
+				if (command === this.CMD_START) {
+					return {
+						thread: true,
+						message: `Hey *${this.user}!* Do you want to play? 
+
+I think of a fruit, and you have to guess what it is. You can provide four letters at a time in the following format: 
+!fruit riddle abcd
+
+If you know the answer, use this command: 
+!fruit riddle solution orange
+
+If you give up, type: 
+!fruit riddle exit
+						
+Let's start! 💪`
+					};
+				}
+				else if (command === this.CMD_EXIT || command === this.CMD_SOLUTION) {
+					return {
+						thread: false,
+						message: `The ${command} command cannot be used outside of the thread.`
+					};
+				}
+				else {
+					// The letters
+					return {
+						thread: false,
+						message: "This game cannot be plaed outside of the thread."
+					};
+				}
+			}
+		}
+
+		return {
+			thread: this.isThread,
+			message: "I can't interpret this command."
+		};
+	},
+
+	/**
+	 * This function is responsible for get a random fruit from the array. The random number is based on the thread time.
+	 * @return - one element from the fruit array
+	 */
+	_getRandomFruit: function() {
+		var _threadTs = (this.threadTs + "").split(".")[0];
+		var randomNumber = _threadTs % 30;
+		return this.fruits[randomNumber];
+	},
+
+	/**
+	 * This function is responsible to check if the given letters are part of the fruit or not
+	 * @param {string} fruit - The current fruit
+	 * @param {string} letters - The four letters which were added by the uyer
+	 * @return - If there are letters witch match it will be given back in correct position. Other ones will be masked with the '_' character. 
+	 */
+	_revealLetters: function(fruit, letters) {
+		return fruit.split('').map(char => {
+			// Check if the character is in the letters array
+			return letters.includes(char) ? char : '_';
+		}).join('');
+	},
+
+	type: 'FruitRiddle'
+};
+
+var gameResultObj = new x_snc_slackerbot.FruitRiddle(current).parse();
+try {
+    new x_snc_slackerbot.Slacker().send_chat(current, gameResultObj.message, gameResultObj.thread);
+}
+catch( e ) {
+    gs.error( "An error occured when SlackerBot tried to send a response back to Slack.\nError: " + e.name + ": " + e.message );
+}