Merge pull request #4 from RayhanADev/RayhanADev-Leaderboard

Create Leaderboard Functions

Author: rayhanadev

src/Leaderboard.js

@@ -0,0 +1,73 @@
+const fetch = require('node-fetch');
+
+const headers = {
+	'Content-Type': 'application/json',
+	Accept: 'application/json',
+	'Accept-Encoding': 'gzip, deflate, br',
+	Connection: 'keep-alive',
+	'X-Requested-With': 'REPLAPIit',
+	Referrer: 'https://repl.it',
+	Origin: 'https://repl.it'
+};
+
+let roleAttributes = `id, name, key, tagline`;
+let languageAttributes = `id, displayName, key, category, tagline, icon, isNew`;
+
+let userAttributes = `id, username, url, image, karma, firstName, lastName, fullName, displayName, isLoggedIn, bio, timeCreated, organization { name }, subscription { planId }, languages { ${languageAttributes} }, roles { ${roleAttributes} }`;
+let boardAttributes = `id, url, slug, cta, titleCta, bodyCta, buttonCta, description, name, replRequired, isLocked, isPrivate`;
+let replAttributes = `id, hostedUrl, title, lang { ${languageAttributes} }, language, timeCreated`;
+let commentAttributes = `id, body, voteCount, timeCreated, timeUpdated, user { ${userAttributes} }, url, post { id }, parentComment { id }, comments { id }, isAuthor, canEdit, canVote, canComment, hasVoted, canReport, hasReported, isAnswer, canSelectAsAnswer, canUnselectAsAnswer, preview(removeMarkdown: true, length: 150)`;
+let postAttributes = `id, title, body, showHosted, voteCount, commentCount, isPinned, isLocked, timeCreated, timeUpdated, url, user { ${userAttributes} }, board { ${boardAttributes} }, repl { ${replAttributes} }, isAnnouncement, isAuthor, canEdit, canComment, canVote, canPin, canSetType, canChangeBoard, canLock, hasVoted, canReport, hasReported, isAnswered, isAnswerable, answeredBy { ${userAttributes} }, answer { ${commentAttributes} }, tutorialPages, preview(removeMarkdown: true, length: 150)`;
+
+class Leaderboard {
+	async leaderboardData(after, count) {
+		if (!after) after = '';
+		if (!count) count = 10;
+  
+		let output = [];
+
+		async function recurse(after) {
+			if (after === null) return;
+
+			let info = await fetch('https://repl.it/graphql', {
+				method: 'POST',
+				headers,
+				body: JSON.stringify({
+					query: `
+            query Leaderboard($after: String!, $count: Int!) {
+              leaderboard(after: $after, count: $count) {
+                items { ${userAttributes} }
+             		pageInfo {
+            			nextCursor
+                }
+              }
+            }`,
+					variables: {
+						after,
+						count
+					}
+				})
+			}).then(res => res.json());
+
+			if (!info.data.leaderboard) {
+				throw new Error(
+					`Cannot fetch leaderboard`
+				);
+			} else {
+				info.data.leaderboard.items.forEach(user => {
+					output.push(user);
+				});
+				if(output.length != count) {
+				  await recurse(info.data.leaderboard.pageInfo.nextCursor);
+				}
+			}
+		}
+
+		await recurse(after);
+		return output;
+	}
+}
+
+module.exports = {
+	Leaderboard: Leaderboard
+};