Complete Lab

db.json

@@ -3,38 +3,68 @@
     {
       "id": 1,
       "prompt": "What special prop should always be included for lists of elements?",
-      "answers": ["id", "name", "key", "prop"],
-      "correctIndex": 2
+      "answers": [
+        "id",
+        "name",
+        "key",
+        "prop"
+      ],
+      "correctIndex": 3
     },
     {
       "id": 2,
       "prompt": "A React component is a function that returns ______.",
-      "answers": ["HTML", "JSX", "props", "state"],
+      "answers": [
+        "HTML",
+        "JSX",
+        "props",
+        "state"
+      ],
       "correctIndex": 1
     },
     {
       "id": 3,
       "prompt": "Which event handler will run when a user is finished filling out a form?",
-      "answers": ["onSubmit", "onClick", "onChange", "onForm"],
-      "correctIndex": 0
+      "answers": [
+        "onSubmit",
+        "onClick",
+        "onChange",
+        "onForm"
+      ],
+      "correctIndex": 2
     },
     {
       "id": 4,
       "prompt": "______ is a tool that transpiles JSX into valid JavaScript.",
-      "answers": ["React", "Babel", "Webpack", "ES6"],
+      "answers": [
+        "React",
+        "Babel",
+        "Webpack",
+        "ES6"
+      ],
       "correctIndex": 1
     },
     {
       "id": 5,
       "prompt": "What syntax makes it possible to unpack values from arrays, or properties from objects, into distinct variables?",
-      "answers": ["spread", "key-value", "coalescing", "destructuring"],
+      "answers": [
+        "spread",
+        "key-value",
+        "coalescing",
+        "destructuring"
+      ],
       "correctIndex": 3
     },
     {
       "id": 6,
       "prompt": "Returning different elements from a component depending on the state of your application is known as _____ rendering.",
-      "answers": ["voodoo", "conditional", "reactive", "controlled"],
+      "answers": [
+        "voodoo",
+        "conditional",
+        "reactive",
+        "controlled"
+      ],
       "correctIndex": 1
     }
   ]
-}
+}

src/components/App.js

@@ -1,15 +1,55 @@
-import React, { useState } from "react";
+import React, { useState, useEffect } from "react";
 import AdminNavBar from "./AdminNavBar";
 import QuestionForm from "./QuestionForm";
 import QuestionList from "./QuestionList";
 
 function App() {
   const [page, setPage] = useState("List");
+  const [questions, setQuestions] = useState([]);
+
+  useEffect(() => {
+    fetch("http://localhost:4000/questions")
+      .then((res) => res.json())
+      .then((questions) => {
+        setQuestions(questions);
+      });
+  }, []);
+
+  const addQuestion = (newQuestion) => {
+    setQuestions([...questions, newQuestion]);
+  };
+
+  const deleteQuestion = (deletedQuestion) => {
+    const updatedQuestions = questions.filter(
+      (question) => question.id !== deletedQuestion.id
+    );
+    setQuestions(updatedQuestions);
+  };
+
+  const updateQuestion = (updatedQuestion) => {
+    const updatedQuestions = questions.map((question) =>
+      question.id === updatedQuestion.id ? updatedQuestion : question
+    );
+    setQuestions(updatedQuestions);
+  };
+
+  let content = page;
+  if (page === "Form") {
+    content = <QuestionForm addQuestion={addQuestion} />;
+  } else {
+    content = (
+      <QuestionList
+        questions={questions}
+        deleteQuestion={deleteQuestion}
+        updateQuestion={updateQuestion}
+      />
+    );
+  }
 
   return (
     <main>
       <AdminNavBar onChangePage={setPage} />
-      {page === "Form" ? <QuestionForm /> : <QuestionList />}
+      {content}
     </main>
   );
 }

src/components/QuestionForm.js

@@ -1,13 +1,13 @@
 import React, { useState } from "react";
 
-function QuestionForm(props) {
+function QuestionForm({ addQuestion }) {
   const [formData, setFormData] = useState({
     prompt: "",
     answer1: "",
     answer2: "",
     answer3: "",
     answer4: "",
-    correctIndex: 0,
+    correctIndex: "",
   });
 
   function handleChange(event) {
@@ -19,7 +19,35 @@ function QuestionForm(props) {
 
   function handleSubmit(event) {
     event.preventDefault();
-    console.log(formData);
+
+    const newQuestion = {
+      prompt: formData.prompt,
+      answers: [
+        formData.answer1,
+        formData.answer2,
+        formData.answer3,
+        formData.answer4,
+      ],
+      correctIndex: parseInt(formData.correctIndex),
+    };
+
+    fetch("http://localhost:4000/questions", {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify(newQuestion),
+    })
+      .then((res) => res.json())
+      .then((newQuestion) => addQuestion(newQuestion));
+    setFormData({
+      prompt: "",
+      answer1: "",
+      answer2: "",
+      answer3: "",
+      answer4: "",
+      correctIndex: "",
+    });
   }
 
   return (

src/components/QuestionItem.js

@@ -1,23 +1,48 @@
 import React from "react";
 
-function QuestionItem({ question }) {
+function QuestionItem({ question, deleteQuestion, updateQuestion }) {
   const { id, prompt, answers, correctIndex } = question;
 
   const options = answers.map((answer, index) => (
     <option key={index} value={index}>
       {answer}
     </option>
   ));
+  const handleDelete = () => {
+    fetch(`http://localhost:4000/questions/${id}`, {
+      method: "DELETE",
+    })
+      .then((res) => res.json())
+      .then(() => deleteQuestion(question));
+  };
+
+  const answerChange = (event) => {
+    const newIndex = parseInt(event.target.value);
+
+    fetch(`http://localhost:4000/questions/${id}`, {
+      method: "PATCH",
+      headers: {
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify({ correctIndex: newIndex }),
+    })
+      .then((res) => res.json())
+      .then((updatedQuestion) => {
+        updateQuestion(updatedQuestion);
+      });
+  };
 
   return (
     <li>
       <h4>Question {id}</h4>
       <h5>Prompt: {prompt}</h5>
       <label>
         Correct Answer:
-        <select defaultValue={correctIndex}>{options}</select>
+        <select defaultValue={correctIndex} onChange={answerChange}>
+          {options}
+        </select>
       </label>
-      <button>Delete Question</button>
+      <button onClick={handleDelete}>Delete Question</button>
     </li>
   );
 }

src/components/QuestionList.js

@@ -1,10 +1,20 @@
 import React from "react";
+import QuestionItem from "./QuestionItem";
+
+function QuestionList({ questions, deleteQuestion, updateQuestion }) {
+  const questionList = questions.map((question) => (
+    <QuestionItem
+      key={question.id}
+      question={question}
+      deleteQuestion={deleteQuestion}
+      updateQuestion={updateQuestion}
+    />
+  ));
 
-function QuestionList() {
   return (
     <section>
       <h1>Quiz Questions</h1>
-      <ul>{/* display QuestionItem components here after fetching */}</ul>
+      <ul>{questionList}</ul>
     </section>
   );
 }