Add trivia-quiz & jeopardy commands;

app.js

@@ -195,6 +195,7 @@ let kara = new Vue({
             }
         },
         getReaction(message) {
+            let preserveLastMessageData = false;
             message = this.cleanupMessage(message);
 
             let keywords = message.split(' ');
@@ -210,7 +211,53 @@ let kara = new Vue({
                 return false;
             }
 
+            if (this.lastMessageData.isJeopardy) {
+                if (this.includesAllOf(keywords, ['give', 'up'])) {
                     this.lastMessageData = {};
+                    return 'The right question would have been: "' + this.lastMessageData.question + '"';
+                }
+
+                if (this.isSimilar(message, this.lastMessageData.question)) {
+                    this.lastMessageData = {};
+                    return this.oneOf([
+                        'Wow! This is the right question.',
+                        'Correct!'
+                    ]);
+                } else {
+                    return this.oneOf([
+                        "Sorry, that's not correct.",
+                        "That's not what we're searching for.",
+                        "Nope, sorry. You can always give up by typing \"I give up\" if you wan't to.",
+                    ]);
+                }
+            }
+
+            if (this.lastMessageData.isTrivia) {
+                if (this.includesAllOf(keywords, ['give', 'up'])) {
+                    this.lastMessageData = {};
+                    return this.oneOf([
+                        'The right answer would have been: "' + this.lastMessageData.question + '"'
+                    ]);
+                }
+
+                if (this.isSimilar(message, this.lastMessageData.answer)) {
+                    this.lastMessageData = {};
+                    return this.oneOf([
+                        'Congratulations! This is the correct answer.',
+                        'Correct!'
+                    ]);
+                } else {
+                    return this.oneOf([
+                        "Sorry, that's not correct.",
+                        "That's not what we're searching for.",
+                        "Nope, sorry. You can always give up by typing \"I give up\" if you wan't to.",
+                    ]);
+                }
+            }
+
+            if (!preserveLastMessageData) {
+                this.lastMessageData = {};
+            }
 
             if (this.includesAllOf(keywords, ['change', 'my', 'name'])) {
                 this.askedForName = true;
@@ -324,7 +371,7 @@ let kara = new Vue({
                 return answer;
             }
 
-            this.getBackupAnswer(message);
+            this.botMessage("I don't know what to say..");
         },
 
         // Forms
@@ -339,7 +386,7 @@ let kara = new Vue({
         },
 
         // Commands
-        processCommands(message) {
+        processCommands: function (message) {
             if (this.checkForCommands(message, 'note')) {
                 let noteToSave = this.checkForCommands(message, 'note');
                 this.saveNote(noteToSave);
@@ -375,6 +422,14 @@ let kara = new Vue({
                 this.getRandomBirb();
             }
 
+            if (this.checkForCommands(message, 'quiz')) {
+                this.getRandomTriviaQuestion();
+            }
+
+            if (this.checkForCommands(message, 'jeopardy')) {
+                this.startJeopardy();
+            }
+
             this.lastMessage = message;
         },
         checkForCommands(message, commands) {
@@ -421,20 +476,6 @@ let kara = new Vue({
 
             this.updateStorage();
         },
-        getBackupAnswer(message) {
-            let vue = this;
-            let url = 'https://some-random-api.ml/chatbot?message=' + message;
-
-            axios.get(url)
-                .then(function (response) {
-                    vue.botMessage(response.data.response);
-                })
-                .catch(function (error) {
-                    vue.botMessage("I don't know what to say..");
-                })
-
-            this.updateStorage();
-        },
         getRandomMeme(category = 'memes') {
             let vue = this;
             let url = 'https://meme-api.herokuapp.com/gimme/';
@@ -573,6 +614,50 @@ let kara = new Vue({
 
             this.updateStorage();
         },
+        getRandomTriviaQuestion() {
+            let vue = this;
+            let url = 'https://jservice.io/api/random';
+
+            axios.get(url)
+                .then(function (response) {
+                    let clue = response.data[0];
+
+                    vue.botMessage('Okay! Here is your question from the category "' + clue.category.title + '":');
+                    vue.botMessage(clue.question);
+
+                    vue.lastMessageData = {
+                        isTrivia: true,
+                        answer: clue.answer
+                    };
+                })
+                .catch(function (error) {
+                    vue.botMessage("It's not a good time for a quiz.");
+                });
+
+            this.updateStorage();
+        },
+        startJeopardy() {
+            let vue = this;
+            let url = 'https://jservice.io/api/random';
+
+            axios.get(url)
+                .then(function (response) {
+                    let clue = response.data[0];
+
+                    vue.botMessage('Okay! Here we go. The category is "' + clue.category.title + '":');
+                    vue.botMessage(clue.answer);
+
+                    vue.lastMessageData = {
+                        isJeopardy: true,
+                        question: clue.question
+                    };
+                })
+                .catch(function (error) {
+                    vue.botMessage("It's not a good time for a quiz.");
+                });
+
+            this.updateStorage();
+        },
 
         // Notes
         saveNote(message) {
@@ -748,6 +833,55 @@ let kara = new Vue({
             }).catch((error) => {
                 console.log(error);
             });
+        },
+
+        // Levenshtein distance
+        isSimilar(message1, message2) {
+            let longer = message1;
+            let shorter = message2;
+
+            if (message1.length < message2.length) {
+                longer = message2;
+                shorter = message1;
+            }
+
+            const longerLength = longer.length;
+            if (longerLength === 0) {
+                return 1.0;
+            }
+
+            let similarity = (longerLength - this.editDistance(longer, shorter)) / parseFloat(longerLength);
+
+            return similarity > 0.65;
+        },
+
+        editDistance: function (message1, message2) {
+            message1 = message1.toLowerCase();
+            message2 = message2.toLowerCase();
+
+            let costs = [];
+            for (let i = 0; i <= message1.length; i++) {
+                let lastValue = i;
+                for (let j = 0; j <= message2.length; j++) {
+                    if (i === 0)
+                        costs[j] = j;
+                    else {
+                        if (j > 0) {
+                            let newValue = costs[j - 1];
+                            if (message1.charAt(i - 1) !== message2.charAt(j - 1))
+                                newValue = Math.min(Math.min(newValue, lastValue),
+                                    costs[j]) + 1;
+                            costs[j - 1] = lastValue;
+                            lastValue = newValue;
+                        }
+                    }
+                }
+                if (i > 0) {
+                    costs[message2.length] = lastValue;
+                }
+            }
+
+            return costs[message2.length];
         }
     }
 })