Add badges, checkins, and transport endpoints

Introduce gamification and check-in support plus expanded transport/admin APIs. Added DDL for checkins, badges and user_badges. New repositories: badgeRepository, userBadgeRepository, checkinRepository. New routes: admin badge management, admin transport (lines/platforms/stations), public transport endpoints, user checkins and stations endpoints, and user badges on /me. Services updated: adminService (badge CRUD & user assignment), userService (checkins, badge queries), authService (hasAdminRights). Minor package.json name update. These changes implement database, repo, service and route wiring for badges, user_badins and checkin features and additional transport admin routes.

repositories/checkinRepository.js

@@ -0,0 +1,93 @@
+const { pool } = require("../modules/database")
+const { DefaultError } = require("../errors/errors")
+
+async function createCheckin(userId, stationId, platformId, latitude, longitude, distance) {
+    try {
+        const sql = "INSERT INTO `checkins` (userId, stationId, platformId, latitude, longitude, distance) VALUES (?, ?, ?, ?, ?, ?)"
+        const rows = await pool.query(sql, [userId, stationId, platformId, latitude, longitude, distance])
+        return rows.insertId
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+async function findCheckinById(checkinId) {
+    try {
+        const sql = "SELECT * FROM `checkins` WHERE id = ?"
+        const rows = await pool.query(sql, [checkinId])
+        return rows[0] || null
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+async function findCheckinsByUserId(userId, limit = 50, offset = 0) {
+    try {
+        const sql = "SELECT * FROM `checkins` WHERE userId = ? ORDER BY checkinAt DESC LIMIT ? OFFSET ?"
+        const rows = await pool.query(sql, [userId, limit, offset])
+        return rows
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+async function findCheckinsByStation(stationId, limit = 50, offset = 0) {
+    try {
+        const sql = "SELECT * FROM `checkins` WHERE stationId = ? ORDER BY checkinAt DESC LIMIT ? OFFSET ?"
+        const rows = await pool.query(sql, [stationId, limit, offset])
+        return rows
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+async function countCheckinsByUser(userId) {
+    try {
+        const sql = "SELECT COUNT(*) as count FROM `checkins` WHERE userId = ?"
+        const rows = await pool.query(sql, [userId])
+        return rows[0].count
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+async function countCheckinsByUserAndStation(userId, stationId) {
+    try {
+        const sql = "SELECT COUNT(*) as count FROM `checkins` WHERE userId = ? AND stationId = ?"
+        const rows = await pool.query(sql, [userId, stationId])
+        return rows[0].count
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+async function findUniqueStationsByUser(userId) {
+    try {
+        const sql = "SELECT DISTINCT stationId FROM `checkins` WHERE userId = ? ORDER BY checkinAt DESC"
+        const rows = await pool.query(sql, [userId])
+        return rows
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+async function deleteCheckin(checkinId) {
+    try {
+        const sql = "DELETE FROM `checkins` WHERE id = ?"
+        const rows = await pool.query(sql, [checkinId])
+        return rows.affectedRows > 0
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+module.exports = {
+    createCheckin,
+    findCheckinById,
+    findCheckinsByUserId,
+    findCheckinsByStation,
+    countCheckinsByUser,
+    countCheckinsByUserAndStation,
+    findUniqueStationsByUser,
+    deleteCheckin
+}