303 lines
11 KiB
Kotlin
303 lines
11 KiB
Kotlin
/**
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* ProjectLaogai
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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.seil0.projectlaogai.controller
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import android.content.Context
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import android.util.Log
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import com.google.gson.Gson
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import com.google.gson.GsonBuilder
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import com.google.gson.JsonParser
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import kotlinx.coroutines.*
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import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.cCourse
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import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.coursesCacheTime
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import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.mensaCacheTime
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import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.timetableCacheTime
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import org.mosad.seil0.projectlaogai.util.*
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import java.io.*
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import java.util.*
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import kotlin.Exception
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import kotlin.collections.ArrayList
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/**
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* TODO rework
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* * move all write functions from TCorController to CacheController
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* * init: check for blocking updates, read all data from cache, check for non blocking update
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* * [x] save needed data to validate cache in separate file
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* * new functions:
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* * [x] updateTimetable(): get Timetable object from TCoRController, write object to file
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* * [x] updateMensa(): get MensaMenu object from TCoRController, write object to file
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* * [ ] save additional subject and lessons
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*/
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class CacheController(cont: Context) {
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private val className = "CacheController"
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private val context = cont
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init {
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val cal = Calendar.getInstance()
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val currentDay = Calendar.getInstance().get(Calendar.DAY_OF_WEEK)
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val currentTime = System.currentTimeMillis() / 1000
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// check if we need to update the mensa data before displaying it
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cal.time = Date(mensaCacheTime * 1000)
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// if a) it's monday and the last cache update was on sunday or b) the cache is older than 24hr, update blocking
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if ((currentDay == Calendar.MONDAY && cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) || (currentTime - mensaMenu.meta.updateTime) > 86400) {
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Log.i(className, "update mensa blocking")
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GlobalScope.launch(Dispatchers.Default) { updateMensaMenu(context).join() }
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}
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cal.time = Date(timetableCacheTime * 1000)
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// if a) it`s monday and the last cache update was not on a sunday or b) the cache is older than 24hr, update blocking
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if ((currentDay == Calendar.MONDAY && cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) || (currentTime - timetableCacheTime) > 86400) {
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Log.i(className, "updating timetable after sunday!")
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GlobalScope.launch(Dispatchers.Default) {
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val threads = listOf(
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updateTimetable(cCourse.courseName, 0, context),
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updateTimetable(cCourse.courseName, 1, context)
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)
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threads.joinAll()
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}
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}
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updateCourseList(context)
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readStartCache(cCourse.courseName) // initially read values from cache
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// check if an update is necessary, not blocking
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if (currentTime - coursesCacheTime > 86400)
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updateCourseList(context)
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if (currentTime - mensaCacheTime > 10800)
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updateMensaMenu(context)
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if (currentTime - timetableCacheTime > 10800) {
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updateTimetable(cCourse.courseName, 0, context)
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updateTimetable(cCourse.courseName, 1, context)
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}
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}
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companion object {
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private const val className = "CacheController"
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var coursesList = ArrayList<Course>()
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var mensaMenu = MensaMenu()
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/**
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* update the course list, async
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*/
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fun updateCourseList(context: Context): Job {
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val file = File(context.filesDir, "courses.json")
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var courseListUp = CoursesList()
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return GlobalScope.launch(Dispatchers.IO) {
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try {
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courseListUp = TCoRAPIController.getCourseListNEW()
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} catch (ex: Exception) {
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Log.e(className, "could not load course list from tcor", ex)
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}
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// update coursesList array list
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coursesList = courseListUp.courses
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// save cache file and update time
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save(file, Gson().toJson(courseListUp))
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coursesCacheTime = System.currentTimeMillis() / 1000
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PreferencesController.save(context)
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}
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}
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/**
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* update the mensa menu, async
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*/
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fun updateMensaMenu(context: Context): Job {
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val file = File(context.filesDir, "mensa.json")
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return GlobalScope.launch(Dispatchers.IO) {
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try {
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mensaMenu = TCoRAPIController.getMensaMenu()
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} catch (ex: Exception) {
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Log.e(className, "could not load mensa menu from tcor", ex)
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}
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// save cache file and update time
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save(file, Gson().toJson(mensaMenu))
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mensaCacheTime = System.currentTimeMillis() / 1000
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PreferencesController.save(context)
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}
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}
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/**
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* update the timetable for a week, async
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* @param courseName the course name (e.g AI1)
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* @param week the week to update (0 for the current and so on)
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*/
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fun updateTimetable(courseName: String, week: Int, context: Context): Job {
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val file = File(context.filesDir, "timetable-$courseName-$week.json")
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var timetable = TimetableWeek()
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// try to update timetable from tcor, async
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return GlobalScope.launch(Dispatchers.IO) {
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try {
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timetable = TCoRAPIController.getTimetable(courseName, week)
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} catch (ex: Exception) {
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Log.e(className, "could not load timetable from tcor", ex)
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}
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// update timetable in TTC
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if (TimetableController.timetable.size > week) {
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TimetableController.timetable[week] = timetable
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} else {
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TimetableController.timetable.add(timetable)
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}
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// save cache file and update time
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save(file, Gson().toJson(timetable))
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timetableCacheTime = System.currentTimeMillis() / 1000
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PreferencesController.save(context)
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}
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}
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private fun save(file: File, text: String) {
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try {
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val writer = BufferedWriter(FileWriter(file))
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writer.write(text)
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writer.close()
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} catch (ex: Exception) {
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Log.e(className, "failed to write file \"${file.absoluteFile}\"", ex)
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}
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}
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}
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/**
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* read coursesList, mensa (current and next week), timetable (current and next week)
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* @param courseName the course name (e.g AI1)
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*/
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private fun readStartCache(courseName: String) {
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try {
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readCoursesList(context)
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} catch (ex : Exception) {
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Log.e(className, "Error while reading the course list", ex)
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}
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try {
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readMensa(context)
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} catch (ex : Exception) {
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Log.e(className, "Error while reading the mensa menu", ex)
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}
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try {
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readTimetable(courseName, 0, context)
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} catch (ex : Exception) {
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Log.e(className, "Error while reading timetable week 0", ex)
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}
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try {
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readTimetable(courseName, 1, context)
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} catch (ex : Exception) {
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Log.e(className, "Error while reading timetable week 1", ex)
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}
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}
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/**
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* read the courses list from the cached file
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* add them to the coursesList object
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*/
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private fun readCoursesList(context: Context) {
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val file = File(context.filesDir, "courses.json")
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// make sure the file exists
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if (!file.exists()) {
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runBlocking { updateCourseList(context).join() }
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return
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}
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coursesList = FileReader(file).use {
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GsonBuilder().create().fromJson(BufferedReader(it).readLine(), CoursesList().javaClass).courses
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}
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}
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/**
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* get the MensaMenu object from the cached json,
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* if cache is empty create the cache file
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*/
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private fun readMensa(context: Context) {
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val file = File(context.filesDir, "mensa.json")
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// make sure the file exists
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if (!file.exists()) {
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runBlocking { updateMensaMenu(context).join() }
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return
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}
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mensaMenu = FileReader(file).use {
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GsonBuilder().create().fromJson(BufferedReader(it).readLine(), MensaMenu().javaClass)
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}
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}
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/**
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* read the weeks timetable from the cached file
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* @param courseName the course name (e.g AI1)
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* @param week the week to read (0 for the current and so on)
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*/
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private fun readTimetable(courseName: String, week: Int, context: Context) {
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val file = File(context.filesDir, "timetable-$courseName-$week.json")
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// if the file does not exist, call updateTimetable blocking and return
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if (!file.exists()) {
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runBlocking { updateTimetable(courseName, week, context).join() }
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return
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}
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val timetableObject = FileReader(file).use {
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JsonParser.parseString(BufferedReader(it).readLine()).asJsonObject
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}
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// if its a TimetableCourseWeek object migrate to TimetableWeek TODO remove converting at version 0.8
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val timetable = if(timetableObject.has("meta")) {
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Log.i(Companion.className, "trying to migrate TimetableCourseWeek to TimetableWeek")
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val timetableWC = Gson().fromJson(timetableObject, TimetableCourseWeek().javaClass)
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save(file, Gson().toJson(TimetableWeek(
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timetableWC.meta.weekIndex,
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timetableWC.meta.weekNumberYear,
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timetableWC.timetable.days
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)))
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TimetableWeek(timetableWC.meta.weekIndex, timetableWC.meta.weekNumberYear, timetableWC.timetable.days)
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} else {
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Gson().fromJson(timetableObject, TimetableWeek().javaClass)
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}
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// update timetable in TTC
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if (TimetableController.timetable.size > week) {
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TimetableController.timetable[week] = timetable
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} else {
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TimetableController.timetable.add(timetable)
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}
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}
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} |