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

186 lines
7.1 KiB
Kotlin

/**
* 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.json.JSONObject
import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.coursesCacheTime
import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.mensaCacheTime
import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.timetableCacheTime
import org.mosad.seil0.projectlaogai.util.CoursesList
import org.mosad.seil0.projectlaogai.util.Lesson
import org.mosad.seil0.projectlaogai.util.MensaMenu
import org.mosad.seil0.projectlaogai.util.TimetableCourseWeek
import java.io.BufferedWriter
import java.io.File
import java.io.FileWriter
import java.net.URL
class TCoRAPIController {
companion object {
private const val className = "TCoRAPIController"
private const val tcorBaseURL = "https://tcor.mosad.xyz"
/**
* Get a array of all currently available courses at the tcor API.
* Read the json object from tcor api and write it as file (cache).
*/
fun getCoursesList(context: Context): Job {
val url = URL("$tcorBaseURL/courseList")
val file = File(context.filesDir, "courses.json")
return GlobalScope.launch(Dispatchers.IO) {
try {
// read data from the API
val coursesObject = JSONObject(url.readText())
// write the json object to a file
val writer = BufferedWriter(FileWriter(file))
writer.write(coursesObject.toString())
writer.close()
// update cache time
coursesCacheTime = System.currentTimeMillis() / 1000
PreferencesController.save(context)
} catch (ex: Exception) {
Log.e(className, "failed to get /courseList", ex)
// write a empty file, since it is loaded later
val writer = BufferedWriter(FileWriter(file))
writer.write(GsonBuilder().create().toJson(CoursesList()))
writer.close()
}
}
}
/**
* Get this and next weeks mensa menus from the tcor API.
* Read the json object from tcor api and write it as file (cache).
*/
fun getMensaMenu(context: Context): Job {
val url = URL("$tcorBaseURL/mensamenu")
val file = File(context.filesDir, "mensa.json")
return GlobalScope.launch(Dispatchers.IO) {
try {
// read data from the API
val mensaObject = JSONObject(url.readText())
// write the json object to a file
val writer = BufferedWriter(FileWriter(file))
writer.write(mensaObject.toString())
writer.close()
// update cache time
mensaCacheTime = System.currentTimeMillis() / 1000
PreferencesController.save(context)
} catch (ex: Exception) {
Log.e(className, "failed to get /mensamenu", ex)
// write a empty file, since it is loaded later
val writer = BufferedWriter(FileWriter(file))
writer.write(GsonBuilder().create().toJson(MensaMenu()))
writer.close()
}
}
}
/**
* Get the timetable for @param courseName at week @param week
* Read the json object from tcor api and write it as file (cache).
*/
fun getTimetable(courseName: String, week: Int, context: Context): Job {
val url = URL("$tcorBaseURL/timetable?course=$courseName&week=$week")
val file = File(context.filesDir, "timetable-$courseName-$week.json")
return GlobalScope.launch(Dispatchers.IO) {
try {
// read data from the API
val timetableObject = JSONObject(url.readText())
// write the json object to a file
val writer = BufferedWriter(FileWriter(file))
writer.write(timetableObject.toString())
writer.close()
// update cache time
timetableCacheTime = System.currentTimeMillis() / 1000
PreferencesController.save(context)
} catch (ex: Exception) {
Log.e(className, "failed to get /timetable", ex)
// write a empty file, since it is loaded later
val writer = BufferedWriter(FileWriter(file))
writer.write(GsonBuilder().create().toJson(TimetableCourseWeek()))
writer.close()
}
}
}
/**
* Get all lessons for a course at one week (async)
* @param courseName the course name
* @param week the week to look up
*/
fun getLessonSubjectListAsync(courseName: String, week: Int): Deferred<ArrayList<String>> {
val url = URL("$tcorBaseURL/subjectList?course=$courseName&week=$week")
return GlobalScope.async {
Gson().fromJson(url.readText(), ArrayList<String>()::class.java)
}
}
/**
* Get all occurrences of a lesson for a course at one week
* @param courseName the course name
* @param subject the subject to search for
* @param week the week to look up
*/
fun getLessons(courseName: String, subject: String, week: Int): ArrayList<Lesson> {
val url = URL("$tcorBaseURL/lessons?course=$courseName&subject=$subject&week=$week")
var array: ArrayList<Lesson>
runBlocking {
withContext(Dispatchers.Default) {
array = Gson().fromJson(
JsonParser.parseString(url.readText()).asJsonArray,
object : TypeToken<ArrayList<Lesson>>() {}.type
)
}
}
return array
}
}
}