Modified some frontend leetcode part. Edit some backend bugs and modi…

backend/leetcode/serializers.py

@@ -19,7 +19,7 @@ class UserProblemRecordSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = UserProblemRecord
-        fields = ["problem", "solved_at"]
+        fields = ["problem", "problem_id", "solved_at"]
 
     def create(self, validated_data):
         return super().create(validated_data)

backend/leetcode/views.py

@@ -17,8 +17,12 @@ class UserProblemRecordViewSet(viewsets.ModelViewSet):
     permission_classes = [permissions.IsAuthenticated]
 
     def get_queryset(self):
-        # return user records
-        return UserProblemRecord.objects.filter(user=self.request.user).select_related("problem")
+        # return user records, ordered by problem_id
+        return (
+            UserProblemRecord.objects.filter(user=self.request.user)
+            .select_related("problem")
+            .order_by("problem__problem_id")
+        )
 
     def perform_create(self, serializer):
         serializer.save(user=self.request.user)

docker-compose.yml

@@ -9,6 +9,7 @@ services:
     command: >
       sh -c "
       python manage.py migrate &&
+      python manage.py get_leetcode_problem &&
       python manage.py runserver 0.0.0.0:8000
       "
     volumes:

frontend/vite-project/src/LeetCode.jsx

@@ -1,97 +1,146 @@
-import React, { useState } from "react";
+import React, { useState, useEffect } from "react";
 import { useNavigate } from "react-router-dom";
 import "./LeetCode.css";
 
 function LeetCode() {
   const navigate = useNavigate();
   const [problemNumber, setProblemNumber] = useState("");
-  const [records, setRecords] = useState([
-    // Example placeholder record
-    {
-      id: 1,
-      number: 1,
-      name: "Two Sum",
-      difficulty: "Easy",
-      topics: ["Array", "Hash Table"],
-      completedAt: "2024-01-15 10:30:00",
-    },
-  ]);
+  const [records, setRecords] = useState([]);
   const [error, setError] = useState("");
+  const [loading, setLoading] = useState(false);
+  const [submitting, setSubmitting] = useState(false);
 
-  const handleSubmit = (e) => {
+  const fetchRecords = async (token) => {
+    setLoading(true);
+    try {
+      const response = await fetch("http://localhost:8000/leetcode/records/", {
+        method: "GET",
+        headers: {
+          Authorization: `Token ${token}`,
+          "Content-Type": "application/json",
+        },
+      });
+
+      if (!response.ok) {
+        throw new Error("Failed to fetch records");
+      }
+
+      const responseData = await response.json();
+      const recordsList = responseData.results || responseData;
+      const sortedRecords = Array.isArray(recordsList)
+        ? recordsList.sort(
+            (a, b) => a.problem.problem_id - b.problem.problem_id,
+          )
+        : [];
+      setRecords(sortedRecords);
+    } catch (error) {
+      console.error("Error fetching records:", error);
+      setError("Failed to load records");
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  useEffect(() => {
+    const token = localStorage.getItem("token");
+    if (token) {
+      fetchRecords(token);
+    } else {
+      navigate("/login");
+    }
+  }, [navigate]);
+
+  const handleSubmit = async (e) => {
     e.preventDefault();
     setError("");
+    setSubmitting(true);
 
     const number = parseInt(problemNumber.trim());
     if (isNaN(number) || number <= 0) {
       setError("Please enter a valid positive integer for the problem number.");
+      setSubmitting(false);
       return;
     }
 
-    if (records.some((record) => record.number === number)) {
+    const token = localStorage.getItem("token");
+    if (!token) {
+      setError("Please login first.");
+      setSubmitting(false);
+      navigate("/login");
+      return;
+    }
+
+    if (records.some((record) => record.problem.problem_id === number)) {
       setError(`Problem #${number} already exists in your records.`);
+      setSubmitting(false);
       return;
     }
 
-    const exampleNames = [
-      "Two Sum",
-      "Add Two Numbers",
-      "Longest Substring Without Repeating Characters",
-      "Median of Two Sorted Arrays",
-      "Longest Palindromic Substring",
-      "ZigZag Conversion",
-      "Reverse Integer",
-      "String to Integer (atoi)",
-      "Palindrome Number",
-      "Regular Expression Matching",
-    ];
-
-    const difficulties = ["Easy", "Medium", "Hard"];
-    const allTopics = [
-      "Array",
-      "Hash Table",
-      "Two Pointers",
-      "String",
-      "Dynamic Programming",
-      "Math",
-      "Tree",
-      "Graph",
-      "Backtracking",
-      "Greedy",
-      "Binary Search",
-      "Stack",
-      "Queue",
-      "Linked List",
-    ];
-
-    const randomName =
-      exampleNames[Math.floor(Math.random() * exampleNames.length)];
-    const randomDifficulty =
-      difficulties[Math.floor(Math.random() * difficulties.length)];
-    const topicCount = Math.floor(Math.random() * 3) + 1; // 1-3 topics
-    const shuffledTopics = [...allTopics].sort(() => 0.5 - Math.random());
-    const randomTopics = shuffledTopics.slice(0, topicCount);
-
-    const now = new Date();
-    const completedAt = `${now.getFullYear()}-${String(
-      now.getMonth() + 1,
-    ).padStart(2, "0")}-${String(now.getDate()).padStart(2, "0")} ${String(
-      now.getHours(),
-    ).padStart(2, "0")}:${String(now.getMinutes()).padStart(2, "0")}:${String(
-      now.getSeconds(),
-    ).padStart(2, "0")}`;
-
-    const newRecord = {
-      id: Date.now(),
-      number: number,
-      name: randomName,
-      difficulty: randomDifficulty,
-      topics: randomTopics,
-      completedAt: completedAt,
-    };
-
-    setRecords([...records, newRecord].sort((a, b) => a.number - b.number));
-    setProblemNumber("");
+    try {
+      const recordResponse = await fetch(
+        "http://localhost:8000/leetcode/records/",
+        {
+          method: "POST",
+          headers: {
+            Authorization: `Token ${token}`,
+            "Content-Type": "application/json",
+          },
+          body: JSON.stringify({
+            problem_id: number,
+          }),
+        },
+      );
+
+      if (!recordResponse.ok) {
+        let errorData;
+        try {
+          errorData = await recordResponse.json();
+        } catch (e) {
+          errorData = {};
+        }
+
+        if (recordResponse.status === 400) {
+          let errorMsg = errorData.detail;
+
+          if (!errorMsg && errorData.problem_id) {
+            if (Array.isArray(errorData.problem_id)) {
+              errorMsg = errorData.problem_id[0];
+            } else {
+              errorMsg = errorData.problem_id;
+            }
+          }
+
+          if (!errorMsg && errorData.non_field_errors) {
+            if (Array.isArray(errorData.non_field_errors)) {
+              errorMsg = errorData.non_field_errors[0];
+            } else {
+              errorMsg = errorData.non_field_errors;
+            }
+          }
+
+          if (!errorMsg) {
+            errorMsg = `Problem #${number} may already exist in your records, or does not exist in the database.`;
+          }
+
+          setError(errorMsg);
+        } else if (recordResponse.status === 404) {
+          setError(`Problem #${number} does not exist in the database. Please ensure the problem is loaded.`);
+        } else {
+          setError(`Failed to create record (status: ${recordResponse.status}). Please try again later.`);
+        }
+        setSubmitting(false);
+        return;
+      }
+
+      await fetchRecords(token);
+      setProblemNumber("");
+      setError("");
+    } catch (error) {
+      console.error("Error creating record:", error);
+      setError("Failed to create record. Please try again later.");
+    } finally {
+      setSubmitting(false);
+    }
   };
 
   const getDifficultyColor = (difficulty) => {
@@ -121,7 +170,7 @@ function LeetCode() {
         <div className="input-section">
           <form onSubmit={handleSubmit} className="problem-input-form">
             <div className="input-group">
-              <label htmlFor="problem-number">Problem number</label>
+              <label htmlFor="problem-number">Problem Number</label>
               <input
                 id="problem-number"
                 type="text"
@@ -132,52 +181,96 @@ function LeetCode() {
                 }}
                 placeholder="Please enter the problem number"
                 className="problem-input"
+                disabled={submitting}
               />
               {error && <div className="error-message">{error}</div>}
             </div>
-            <button type="submit" className="submit-btn">
-              confirm
+            <button
+              type="submit"
+              className="submit-btn"
+              disabled={submitting}
+            >
+              {submitting ? "Submitting..." : "Confirm"}
             </button>
           </form>
         </div>
 
         {/* Records Section */}
         <div className="records-section">
           <h2>Completed Problems</h2>
-          {records.length === 0 ? (
+          {loading ? (
+            <div className="empty-state">
+              <p>Loading...</p>
+            </div>
+          ) : records.length === 0 ? (
             <div className="empty-state">
-              <p>Null</p>
-              <p className="hint">Please enter the problem number.</p>
+              <p>No records</p>
+              <p className="hint">Please enter a problem number to add a record.</p>
             </div>
           ) : (
             <div className="records-list">
-              {records.map((record) => (
-                <div key={record.id} className="record-card">
-                  <div className="record-header">
-                    <div className="record-number">#{record.number}</div>
-                    <div
-                      className="difficulty-badge"
-                      style={{
-                        backgroundColor: getDifficultyColor(record.difficulty),
-                      }}
-                    >
-                      {record.difficulty}
+              {records.map((record) => {
+                const problem = record.problem;
+                const solvedAt = record.solved_at
+                  ? new Date(record.solved_at).toLocaleString("en-US", {
+                      year: "numeric",
+                      month: "2-digit",
+                      day: "2-digit",
+                      hour: "2-digit",
+                      minute: "2-digit",
+                      second: "2-digit",
+                    })
+                  : "Not recorded";
+
+                return (
+                  <div
+                    key={`record-${problem.problem_id}`}
+                    className="record-card"
+                  >
+                    <div className="record-header">
+                      <div className="record-number">#{problem.problem_id}</div>
+                      <div
+                        className="difficulty-badge"
+                        style={{
+                          backgroundColor: getDifficultyColor(problem.difficulty),
+                        }}
+                      >
+                        {problem.difficulty}
+                      </div>
                     </div>
-                  </div>
-                  <div className="record-name">{record.name}</div>
-                  <div className="record-topics">
-                    <span className="topics-label">Topics:</span>
-                    <div className="topics-list">
-                      {record.topics.map((topic, index) => (
-                        <span key={index} className="topic-tag">
-                          {topic}
-                        </span>
-                      ))}
+                    <div className="record-name">
+                      {problem.url ? (
+                        <a
+                          href={problem.url}
+                          target="_blank"
+                          rel="noopener noreferrer"
+                          style={{
+                            color: "#007bff",
+                            textDecoration: "none",
+                          }}
+                        >
+                          {problem.title}
+                        </a>
+                      ) : (
+                        problem.title
+                      )}
                     </div>
+                    {problem.tags && problem.tags.length > 0 && (
+                      <div className="record-topics">
+                        <span className="topics-label">Tags:</span>
+                        <div className="topics-list">
+                          {problem.tags.map((tag, index) => (
+                            <span key={index} className="topic-tag">
+                              {tag}
+                            </span>
+                          ))}
+                        </div>
+                      </div>
+                    )}
+                    <div className="record-time">Solved at: {solvedAt}</div>
                   </div>
-                  <div className="record-time">Date: {record.completedAt}</div>
-                </div>
-              ))}
+                );
+              })}
             </div>
           )}
         </div>