ProjectLaogai/app/src/main/java/org/mosad/seil0/projectlaogai/controller/CacheController.kt

122 lines
4.3 KiB
Kotlin

/**
* ProjectLaogai
*
* Copyright 2019 <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 com.google.gson.Gson
import com.google.gson.GsonBuilder
import com.google.gson.JsonParser
import java.io.BufferedReader
import java.io.File
import java.io.FileReader
import com.google.gson.reflect.TypeToken
import org.mosad.seil0.projectlaogai.hsoparser.*
import kotlin.collections.ArrayList
class CacheController(cont: Context) {
private val context = cont
init {
// TODO move cache check here
}
companion object {
var coursesList = ArrayList<Course>()
var timetables = ArrayList<TimetableWeek>()
var mensaMenu = MensaMenu(MensaMeta(0, ""), MensaWeek(), MensaWeek())
/**
* 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()) {
TCoRAPIController.getMensa(context).get()
}
val fileReader = FileReader(file)
val bufferedReader = BufferedReader(fileReader)
val mensaObject = JsonParser().parse(bufferedReader.readLine()).asJsonObject
mensaMenu = GsonBuilder().create().fromJson(mensaObject, MensaMenu(MensaMeta(0, ""), MensaWeek(), MensaWeek()).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())
TCoRAPIController.getTimetable(courseName, week, context).get()
val fileReader = FileReader(file)
val bufferedReader = BufferedReader(fileReader)
val timetableObject = JsonParser().parse(bufferedReader.readLine()).asJsonObject
// make sure you add the single weeks in the exact order!
if (timetables.size == week) {
timetables.add(Gson().fromJson(timetableObject.getAsJsonObject("timetable"), TimetableWeek().javaClass))
} else if (timetables.size >= week) {
timetables[week] = Gson().fromJson(timetableObject.getAsJsonObject("timetable"), TimetableWeek().javaClass)
}
}
}
/**
* read coursesList, mensa (current and next week), timetable (current and next week)
* @param courseName the course name (e.g AI1)
*/
fun readStartCache(courseName: String) {
readCoursesList()
readMensa(context)
readTimetable(courseName, 0, context)
readTimetable(courseName, 1, context)
}
/**
* read the courses list from the cached file
* add them to the coursesList object
*/
private fun readCoursesList() {
val file = File(context.filesDir, "courses.json")
// make sure the file exists
if (!file.exists())
TCoRAPIController(context).getCoursesList().get()
val fileReader = FileReader(file)
val bufferedReader = BufferedReader(fileReader)
val coursesObject = JsonParser().parse(bufferedReader.readLine()).asJsonObject
coursesList = Gson().fromJson(coursesObject.getAsJsonArray("courses"), object : TypeToken<List<Course>>() {}.type)
}
}