The API backend for https://git.mosad.xyz/Seil0/ProjectLaogai
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186 lines
7.1 KiB
186 lines
7.1 KiB
/** |
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* TheCitadelofRicks |
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* |
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* Copyright 2019 <seil0@mosad.xyz> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
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* MA 02110-1301, USA. |
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* |
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*/ |
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package org.mosad.thecitadelofricks |
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import kotlinx.coroutines.GlobalScope |
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import kotlinx.coroutines.async |
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import kotlinx.coroutines.launch |
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import kotlinx.coroutines.runBlocking |
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import org.mosad.thecitadelofricks.hsoparser.CourseListParser |
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import org.mosad.thecitadelofricks.hsoparser.MensaParser |
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import org.mosad.thecitadelofricks.hsoparser.TimetableParser |
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import org.slf4j.Logger |
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import org.slf4j.LoggerFactory |
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import java.util.* |
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import kotlin.collections.ArrayList |
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import kotlin.concurrent.scheduleAtFixedRate |
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class CacheController { |
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private val logger: Logger = LoggerFactory.getLogger(CacheController::class.java) |
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// hso parser links (hardcoded) |
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private val courseListURL = "https://www.hs-offenburg.de/studium/vorlesungsplaene/" |
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private val mensaMenuURL = "https://www.swfr.de/de/essen-trinken/speiseplaene/mensa-offenburg/" |
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private val mensaName = "Offenburg" |
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// cache objects |
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companion object{ |
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lateinit var courseList: CourseList |
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lateinit var mensaMenu: MensaMenu |
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var timetableList = ArrayList<TimetableCourseWeek>() // this list contains all timetables |
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} |
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init { |
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initUpdates() |
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scheduledUpdates() |
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} |
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fun getTimetable(courseName: String, week: Int): TimetableCourseWeek = runBlocking { |
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val currentTime = System.currentTimeMillis() / 1000 |
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var timetable = TimetableWeek() |
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// check if the timetable already exists and is up to date |
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when (timetableList.stream().filter { x -> x.meta.courseName == courseName && x.meta.week == week }.findAny().orElse(null)) { |
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// there is no such course yet, create one |
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null -> { |
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val courseLink = courseList.courses.stream().filter { x -> x.courseName == courseName }.findFirst().orElse(null).courseLink |
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val timetableMeta = TimetableCourseMeta(currentTime, courseName, week, courseLink.replace("week=0","week=$week")) |
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val jobTimetable = GlobalScope.async { |
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timetable = TimetableParser().getTimeTable(timetableMeta.link) |
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} |
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jobTimetable.await() |
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timetableList.add(TimetableCourseWeek(timetableMeta, timetable)) |
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logger.info("added new timetable for $courseName, week $week") |
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} |
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} |
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return@runBlocking timetableList.stream().filter { x -> x.meta.courseName == courseName && x.meta.week == week }.findAny().orElse(null) |
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} |
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/** |
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* this function updates the courseList |
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* during the update process the old data will be returned for a API request |
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*/ |
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private fun asyncUpdateCourseList() = GlobalScope.launch { |
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val result = CourseListParser().getCourseLinks(courseListURL) |
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if (result != null) { |
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courseList = CourseList(CourseMeta(System.currentTimeMillis() / 1000, result.size), result) |
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} |
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logger.info("updated courses successful at ${Date(courseList.meta.updateTime * 1000)}") |
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} |
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/** |
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* this function updates the mensa menu list |
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* during the update process the old data will be returned for a API request |
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*/ |
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private fun asyncUpdateMensa() = GlobalScope.launch { |
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val mensaCurrentWeek = MensaParser().getMensaMenu(mensaMenuURL) |
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val mensaNextWeek = MensaParser().getMensaMenu(MensaParser().getMenuLinkNextWeek(mensaMenuURL)) |
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// only update if we get valid data |
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if (mensaCurrentWeek != null && mensaNextWeek != null) { |
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mensaMenu = MensaMenu(MensaMeta(System.currentTimeMillis() / 1000, mensaName), mensaCurrentWeek, mensaNextWeek) |
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} |
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logger.info("updated mensamenu successful at ${Date(mensaMenu.meta.updateTime * 1000)}") |
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} |
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/** |
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* this function updates all existing timetables |
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* during the update process the old data will be returned for a API request |
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*/ |
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private fun asyncUpdateTimetables() = GlobalScope.launch { |
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timetableList.forEach { timetableCourse -> |
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val updateURL = timetableCourse.meta.link |
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timetableCourse.timetable = TimetableParser().getTimeTable(updateURL) |
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timetableCourse.meta.updateTime = System.currentTimeMillis() / 1000 |
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} |
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logger.info("updated ${timetableList.size} timetables successful!") |
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} |
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/** |
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* before the APIController is up, get the data fist |
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* runBlocking: otherwise the api would return no data to requests for a few seconds after startup |
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*/ |
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private fun initUpdates() = runBlocking { |
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// get all courses on startup |
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val jobCourseUpdate = GlobalScope.async { |
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val result = CourseListParser().getCourseLinks(courseListURL) |
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if (result != null) { |
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courseList = CourseList(CourseMeta(System.currentTimeMillis() / 1000, result.size), result) |
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} |
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} |
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// get the current and next weeks mensa menus |
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val jobMensa = GlobalScope.async{ |
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val mensaCurrentWeek = MensaParser().getMensaMenu(mensaMenuURL) |
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val mensaNextWeek = MensaParser().getMensaMenu(MensaParser().getMenuLinkNextWeek(mensaMenuURL)) |
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// only update if we get valid data |
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if (mensaCurrentWeek != null && mensaNextWeek != null) { |
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mensaMenu = MensaMenu(MensaMeta(System.currentTimeMillis() / 1000, mensaName), mensaCurrentWeek, mensaNextWeek) |
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} |
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} |
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jobCourseUpdate.await() |
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jobMensa.await() |
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logger.info("init updates successful") |
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} |
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/** |
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* doesn't account the change between winter and summer time! |
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* |
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*/ |
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private fun scheduledUpdates() { |
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val currentTime = System.currentTimeMillis() |
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val initDelay24h = (86400000 - ((currentTime + 3600000) % 86400000)) + 60000 |
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val initDelay3h = (10800000 - ((currentTime + 3600000) % 10800000)) + 60000 |
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val initDelay1h = (3600000 - ((currentTime + 3600000) % 10800000)) + 60000 |
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println(initDelay1h / 1000) |
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// update courseList every 24 hours (time in ms) |
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Timer().scheduleAtFixedRate(initDelay24h, 86400000) { |
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asyncUpdateCourseList() |
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} |
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// update all already existing timetables every 3 hours (time in ms) |
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Timer().scheduleAtFixedRate(initDelay3h, 10800000) { |
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asyncUpdateTimetables() |
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} |
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// update courses every hour (time in ms) |
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Timer().scheduleAtFixedRate(initDelay1h, 3600000) { |
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asyncUpdateMensa() |
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} |
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} |
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} |