This is the home of the new hsoApp!
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/**
* ProjectLaogai
*
* Copyright 2019-2020 <seil0@mosad.xyz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*/
package org.mosad.seil0.projectlaogai.controller
import android.content.Context
import android.util.Log
import com.google.gson.Gson
import com.google.gson.GsonBuilder
import com.google.gson.JsonParser
import com.google.gson.reflect.TypeToken
import kotlinx.coroutines.*
import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.cCourse
import org.mosad.seil0.projectlaogai.hsoparser.Course
import org.mosad.seil0.projectlaogai.hsoparser.MensaMenu
import org.mosad.seil0.projectlaogai.hsoparser.TimetableCourseWeek
import java.io.BufferedReader
import java.io.File
import java.io.FileReader
import java.util.*
import kotlin.collections.ArrayList
class CacheController(cont: Context) {
private val className = "CacheController"
private val context = cont
init {
val cal = Calendar.getInstance()
val currentDay = Calendar.getInstance().get(Calendar.DAY_OF_WEEK)
val currentTime = System.currentTimeMillis() / 1000
// check if we need to update the mensa data before displaying it
readMensa(context)
cal.time = Date(mensaMenu.meta.updateTime * 1000)
// if a) it's monday and the last cache update was on sunday or b) the cache is older than 24hr, update blocking
if ((currentDay == Calendar.MONDAY && cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) || (currentTime - mensaMenu.meta.updateTime) > 86400) {
Log.i(className, "update mensa blocking")
GlobalScope.launch(Dispatchers.Default) { TCoRAPIController.getMensa(context).join() }
}
// check if we need to update the timetables before displaying them
readTimetable(cCourse.courseName, 0, context)
cal.time = Date(timetables[0].meta.updateTime * 1000)
// 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
if ((currentDay == Calendar.MONDAY && cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) || (currentTime - timetables[0].meta.updateTime) > 86400) {
Log.i(className, "updating timetable after sunday!")
GlobalScope.launch(Dispatchers.Default) {
val threads = listOf(
TCoRAPIController.getTimetable(cCourse.courseName, 0, context),
TCoRAPIController.getTimetable(cCourse.courseName, 1, context)
)
threads.joinAll()
}
TCoRAPIController.getTimetable(cCourse.courseName, 0, context)
TCoRAPIController.getTimetable(cCourse.courseName, 1, context)
}
// check if an update is necessary, not blocking
if (currentTime - PreferencesController.coursesCacheTime > 86400)
TCoRAPIController.getCoursesList(context)
if (currentTime - PreferencesController.mensaCacheTime > 10800)
TCoRAPIController.getMensa(context)
if (currentTime - PreferencesController.timetableCacheTime > 10800) {
TCoRAPIController.getTimetable(cCourse.courseName, 0, context)
TCoRAPIController.getTimetable(cCourse.courseName, 1, context)
}
readStartCache(cCourse.courseName)
}
companion object {
var coursesList = ArrayList<Course>()
var timetables = ArrayList<TimetableCourseWeek>()
var mensaMenu = MensaMenu()
/**
* read the courses list from the cached file
* add them to the coursesList object
*/
private fun readCoursesList(context: Context) {
val file = File(context.filesDir, "courses.json")
// make sure the file exists
if (!file.exists())
runBlocking { TCoRAPIController.getCoursesList(context).join() }
val fileReader = FileReader(file)
val bufferedReader = BufferedReader(fileReader)
val coursesObject = JsonParser.parseString(bufferedReader.readLine()).asJsonObject
coursesList = Gson().fromJson(
coursesObject.getAsJsonArray("courses"),
object : TypeToken<List<Course>>() {}.type
)
}
/**
* get the MensaMenu object from the cached json,
* if cache is empty create the cache file
*/
fun readMensa(context: Context) {
val file = File(context.filesDir, "mensa.json")
// make sure the file exists
if (!file.exists())
runBlocking { TCoRAPIController.getMensa(context).join() }
val fileReader = FileReader(file)
val bufferedReader = BufferedReader(fileReader)
val mensaObject = JsonParser.parseString(bufferedReader.readLine()).asJsonObject
mensaMenu = GsonBuilder().create().fromJson(mensaObject, MensaMenu().javaClass)
}
/**
* read the weeks timetable from the cached file
* @param courseName the course name (e.g AI1)
* @param week the week to read (0 for the current and so on)
*/
fun readTimetable(courseName: String, week: Int, context: Context) {
val file = File(context.filesDir, "timetable-$courseName-$week.json")
// make sure the file exists
if (!file.exists())
runBlocking { TCoRAPIController.getTimetable(courseName, week, context).join() }
val fileReader = FileReader(file)
val bufferedReader = BufferedReader(fileReader)
val timetableObject = JsonParser.parseString(bufferedReader.readLine()).asJsonObject
// make sure you add the single weeks in the exact order!
if (timetables.size > week) {
timetables[week] = (Gson().fromJson(timetableObject, TimetableCourseWeek().javaClass))
} else {
timetables.add(Gson().fromJson(timetableObject, TimetableCourseWeek().javaClass))
}
}
}
/**
* read coursesList, mensa (current and next week), timetable (current and next week)
* @param courseName the course name (e.g AI1)
*/
private fun readStartCache(courseName: String) {
readCoursesList(context)
readMensa(context)
readTimetable(courseName, 0, context)
readTimetable(courseName, 1, context)
}
}

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