import axios, { AxiosInstance } from "axios";
import {
userProfileQuery,
userSubmissionsQuery,
dailyChallengeQuery,
problemDetailsQuery,
searchProblemsQuery,
contestDetailsQuery,
userContestRankingQuery
} from "../graphql/queries.js";
export class LeetCodeService {
private readonly API_URL = "https://leetcode.com/graphql";
private readonly http: AxiosInstance;
constructor() {
this.http = axios.create({
headers: {
"Content-Type": "application/json",
"Referer": "https://leetcode.com"
}
});
}
/**
* Execute a GraphQL query against the LeetCode API
*/
private async executeQuery(query: string, variables: Record<string, any> = {}) {
try {
const response = await this.http.post(this.API_URL, {
query,
variables
});
if (response.data.errors) {
throw new Error(response.data.errors[0].message);
}
return response.data.data;
} catch (error: unknown) {
if (error && typeof error === 'object' && 'response' in error && error.response) {
const axiosError = error as { response: { status: number, data?: any } };
throw new Error(`API Error: ${axiosError.response.status} - ${axiosError.response.data?.message || JSON.stringify(axiosError.response.data)}`);
} else if (error && typeof error === 'object' && 'request' in error) {
throw new Error("Network Error: No response received from LeetCode API");
}
// 如果是其他类型的错误，转换为Error类型
if (error instanceof Error) {
throw error;
}
throw new Error(String(error));
}
}
/**
* Fetch user profile data
*/
async fetchUserProfile(username: string) {
return this.executeQuery(userProfileQuery, { username });
}
/**
* Fetch user submissions
*/
async fetchUserSubmissions(username: string, limit: number = 20) {
return this.executeQuery(userSubmissionsQuery, { username, limit });
}
/**
* Fetch the daily challenge
*/
async fetchDailyChallenge() {
return this.executeQuery(dailyChallengeQuery);
}
/**
* Fetch details about a specific problem
*/
async fetchProblem(titleSlug: string) {
return this.executeQuery(problemDetailsQuery, { titleSlug });
}
/**
* Search for problems matching criteria
*/
async searchProblems(tags?: string, difficulty?: string, limit: number = 20, skip: number = 0) {
return this.executeQuery(searchProblemsQuery, {
categorySlug: "",
limit,
skip,
filters: {
tags: tags ? tags.split("+") : [],
difficulty: difficulty || null
}
});
}
/**
* Fetch contest details
*/
async fetchContestDetails(contestSlug: string) {
return this.executeQuery(contestDetailsQuery, { contestSlug });
}
/**
* Fetch user contest ranking
*/
async fetchUserContestRanking(username: string) {
return this.executeQuery(userContestRankingQuery, { username });
}
}