250 lines
11 KiB
Kotlin
250 lines
11 KiB
Kotlin
/**
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* TheCitadelofRicks
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*
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* Copyright 2019-2020 <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.controller
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import com.google.gson.Gson
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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.*
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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.io.BufferedWriter
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import java.io.File
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import java.io.FileWriter
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import java.util.*
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import java.util.concurrent.Executors
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import kotlin.collections.ArrayList
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import kotlin.collections.HashSet
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import kotlin.concurrent.scheduleAtFixedRate
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class CacheController {
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init {
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initUpdates()
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scheduledUpdates()
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}
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companion object{
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private val logger: Logger = LoggerFactory.getLogger(CacheController::class.java)
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var courseList = CoursesList(CoursesMeta(0, 0), ArrayList())
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var mensaMenu = MensaMenu(MensaMeta(0,""), MensaWeek(), MensaWeek())
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var timetableList = ArrayList<TimetableCourseWeek>() // this list contains all timetables
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/**
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* get a timetable, since they may not be cached, we need to make sure it's cached, otherwise download
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* @param courseName the name of the course to be requested
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* @param weekIndex request week number (current week = 0)
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* @return timetable of the course (Type: [TimetableCourseWeek])
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*/
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fun getTimetable(courseName: String, weekIndex: Int): TimetableCourseWeek = runBlocking {
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val currentTime = System.currentTimeMillis() / 1000
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var timetable = TimetableWeek()
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var weekNumberYear = 0
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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.weekIndex == weekIndex }.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 timetableLink = courseLink.replace("week=0","week=$weekIndex")
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val jobTimetable = async {
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timetable = TimetableParser().getTimeTable(timetableLink)
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weekNumberYear = TimetableParser().getWeekNumberYear(timetableLink)
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}
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jobTimetable.await()
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timetableList.add(TimetableCourseWeek(TimetableCourseMeta(currentTime, courseName, weekIndex, weekNumberYear, timetableLink), timetable))
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logger.info("added new timetable for $courseName, week $weekIndex")
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}
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}
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return@runBlocking timetableList.stream().filter { x -> x.meta.courseName == courseName && x.meta.weekIndex == weekIndex }.findAny().orElse(null)
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}
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/**
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* get every explicit lesson in a week for a selected course
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* @param courseName the name of the course to be requested
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* @param weekIndex request week number (current week = 0)
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* @return a HashSet of explicit lessons for one week
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*/
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fun getLessonSubjectList(courseName: String, weekIndex: Int): HashSet<String> = runBlocking {
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val lessonSubjectList = ArrayList<String>()
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// get every lesson subject for the given week
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val flatMap = getTimetable(courseName, weekIndex).timetable.days.flatMap { it.timeslots.asIterable() }
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flatMap.forEach {
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it.stream().filter { x -> x.lessonSubject.isNotEmpty() }.findAny().ifPresent { x -> lessonSubjectList.add(x.lessonSubject) }
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}
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return@runBlocking HashSet(lessonSubjectList)
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}
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/**
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* get every lesson of a subject in a week
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* @param courseName the name of the course to be requested
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* @param lessonSubject the lesson subject to be requested
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* @param weekIndex request week number (current week = 0)
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* @return a ArrayList<[Lesson]> of every lesson with lessonSubject for one week
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*/
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fun getLesson(courseName: String, lessonSubject: String, weekIndex: Int): ArrayList<Lesson> {
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val lessonList = ArrayList<Lesson>()
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// get all lessons from the weeks timetable
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val flatMap = getTimetable(courseName, weekIndex).timetable.days.flatMap { it.timeslots.asIterable() }
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flatMap.forEach {
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it.stream().filter { x -> x.lessonSubject.contains(lessonSubject) }.findAny().ifPresent { x -> lessonList.add(x) }
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}
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return lessonList
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}
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// private cache functions
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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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CourseListParser().getCourseLinks(StartupController.courseListURL)?.let {
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courseList = CoursesList(CoursesMeta(System.currentTimeMillis() / 1000, it.size), it)
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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(StartupController.mensaMenuURL)
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val mensaNextWeek = MensaParser().getMensaMenu(MensaParser().getMenuLinkNextWeek(StartupController.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, StartupController.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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* a FixedThreadPool is used to make parallel requests for faster updates
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*/
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private fun asyncUpdateTimetables() = GlobalScope.launch {
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logger.info("Updating ${timetableList.size} timetables ...")
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// create a new ThreadPool with 5 threads
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val executor = Executors.newFixedThreadPool(5)
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try {
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timetableList.forEach { timetableCourse ->
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executor.execute {
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timetableCourse.timetable = TimetableParser().getTimeTable(timetableCourse.meta.link)
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timetableCourse.meta.updateTime = System.currentTimeMillis() / 1000
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saveTimetableToCache(timetableCourse) // save the updated timetable to the cache directory
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}
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}
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} catch (ex: Exception) {
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logger.error("Error while updating the timetables", ex)
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} finally {
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executor.shutdown()
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}
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}
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/**
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* save a timetable to the cache directory
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* this is only call on async updates, it is NOT call when first getting the timetable
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* @param timetable a timetable of the type [TimetableCourseWeek]
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*/
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private fun saveTimetableToCache(timetable: TimetableCourseWeek) {
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println(timetable.timetable.toString())
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val file = File(StartupController.dirTcorCache, "timetable-${timetable.meta.courseName}-${timetable.meta.weekIndex}.json")
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val writer = BufferedWriter(FileWriter(file))
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writer.write(Gson().toJson(timetable))
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writer.close()
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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 course links on startup, make sure there are course links
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val jobCourseUpdate = asyncUpdateCourseList()
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val jobMensa = asyncUpdateMensa()
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jobCourseUpdate.join()
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jobMensa.join()
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logger.info("Initial updates successful")
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}
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/**
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* update the CourseList every 24h, the Timetables every 3h and the Mensa Menu every hour
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* doesn't account the change between winter and summer time!
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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) % 3600000)) + 60000
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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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// post to status.mosad.xyz every hour, if an API key is present
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if (StartupController.cachetAPIKey != "0") {
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Timer().scheduleAtFixedRate(initDelay1h, 3600000) {
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CachetAPIController.postTotalRequests()
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}
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}
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}
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}
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} |