update coursesList and mensa every 24/6 hours & added status page

* the status page shows the latest updates and the http staus of the hso and swfr sites

src/main/kotlin/org/mosad/thecitadelofricks/APIController.kt

@@ -29,12 +29,18 @@ import org.mosad.thecitadelofricks.hsoparser.TimetableParser
 import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.RequestParam
 import org.springframework.web.bind.annotation.RestController
-import java.util.ArrayList
+import java.lang.Exception
+import java.net.*
+import java.util.*
+import kotlin.concurrent.scheduleAtFixedRate
+import java.time.LocalDateTime
 
 
 @RestController
 class APIController {
 
+    //private val logger = LoggerFactory.getLogger(DemoApplication::class.java)
+
     private val mensaLink = "https://www.swfr.de/de/essen-trinken/speiseplaene/mensa-offenburg/"
     private val mensaName = "Offenburg"
 
@@ -48,20 +54,29 @@ class APIController {
     private var mensaLastUpdate: Long = 0
 
     init {
-        initUpdates()
+        initUpdates() // without this 5-10 seconds after startup the response will be empty
+
+        // TODO we could use a first time delay
+        // update courses every 24 hours (time in ms)
+        Timer().scheduleAtFixedRate(0, 86400000) {
+            asyncUpdateCourses()
+        }
+
+        // update courses every 6 hours (time in ms)
+        Timer().scheduleAtFixedRate(0, 21600000) {
+            asyncUpdateMensa()
+        }
     }
 
     @RequestMapping("/courses")
     fun courses(): CoursesList {
         println("courses request at " + System.currentTimeMillis() / 1000 + "!")
-        updateCoursesAsync() // check if we need to update and perform the update if so
         return  CoursesList(CoursesMeta(coursesLinkList.size, coursesLastUpdate), coursesLinkList)
     }
 
     @RequestMapping("/mensamenu")
     fun mensamenu(): Mensa {
         println("mensamenu request at " + System.currentTimeMillis() / 1000 + "!")
-        updateMensa() // check if we need to update and perform the update if so
         return  Mensa(MensaMeta(mensaName, mensaLastUpdate), mensaCurrentWeek, mensaNextWeek)
     }
 
@@ -72,20 +87,37 @@ class APIController {
         return timetableList.stream().filter { x -> x.meta.courseName == courseName }.findAny().orElse(null)
     }
 
+    @RequestMapping("/status")
+    fun status(): Status {
+        println("status request at " + System.currentTimeMillis() / 1000 + "!")
+        var hsoCode = 999
+        var swfrCode = 999
+
+        try {
+            val hsoURL = URL("https://www.hs-offenburg.de/")
+            var connection = hsoURL.openConnection() as HttpURLConnection
+            connection.requestMethod = "HEAD"
+            hsoCode = connection.responseCode
+            val swfrURL = URL("https://www.swfr.de/")
+            connection = swfrURL.openConnection() as HttpURLConnection
+            swfrCode = connection.responseCode
+        } catch (e: Exception) {
+            // do some error handling
+        }
+
+        return  Status(LocalDateTime.now(), Date(coursesLastUpdate * 1000), Date(mensaLastUpdate * 1000), hsoCode, swfrCode)
+    }
+
     /**
      * checks if we need to update the courses list and if so does it async
      * during the update process the old data will be returned for a API request
      * update if the last update was 24 hours ago
      */
-    private fun updateCoursesAsync() = GlobalScope.launch {
-        val currentTime = System.currentTimeMillis() / 1000
-        if ((currentTime - coursesLastUpdate) > 86400) {
-            coursesLinkList = CourseListParser().getCourseLinks()
-            coursesLastUpdate = currentTime
-            println("updated courses successful at "  + System.currentTimeMillis() / 1000)
-        } else {
-            println("courses are up to date!")
-        }
+    private fun asyncUpdateCourses() = GlobalScope.launch {
+        coursesLinkList = CourseListParser().getCourseLinks()
+        coursesLastUpdate = System.currentTimeMillis() / 1000
+
+        println("updated courses successful at $coursesLastUpdate")
     }
 
     /**
@@ -93,16 +125,12 @@ class APIController {
      * during the update process the old data will be returned for a API request
      * update if the last update was 6 hours ago
      */
-    private fun updateMensa() = GlobalScope.launch {
-        val currentTime = System.currentTimeMillis() / 1000
-        if ((currentTime - coursesLastUpdate) > 21600) {
-            mensaCurrentWeek = MensaParser().getMensaMenu(mensaLink)
-            mensaNextWeek = MensaParser().getMensaMenu(MensaParser().getMenuLinkNextWeek(mensaLink))
-            mensaLastUpdate = currentTime
-            println("updated mensamenu successful at "  + System.currentTimeMillis() / 1000)
-        } else {
-            println("mensamenu is up to date!")
-        }
+    private fun asyncUpdateMensa() = GlobalScope.launch {
+        mensaCurrentWeek = MensaParser().getMensaMenu(mensaLink)
+        mensaNextWeek = MensaParser().getMensaMenu(MensaParser().getMenuLinkNextWeek(mensaLink))
+        mensaLastUpdate = System.currentTimeMillis() / 1000
+
+        println("updated mensamenu successful at $mensaLastUpdate")
     }
 
     /**

src/main/kotlin/org/mosad/thecitadelofricks/DataTypes.kt

@@ -22,6 +22,9 @@
 
 package org.mosad.thecitadelofricks
 
+import java.time.LocalDateTime
+import java.util.*
+
 // data classes for the course part
 data class Course(val courseName: String, val courseLink: String)
 
@@ -34,7 +37,7 @@ data class Meal(val day: String, val heading: String, val parts: ArrayList<Strin
 
 data class Meals(val meals: ArrayList<Meal>)
 
-data class MensaWeek(val days: Array<Meals> = Array(7) { Meals(ArrayList<Meal>()) })
+data class MensaWeek(val days: Array<Meals> = Array(7) { Meals(ArrayList()) })
 
 data class MensaMeta(val mensaName: String, val time: Long)
 
@@ -49,4 +52,8 @@ data class TimetableWeek(val days: Array<TimetableDay> = Array(6) { TimetableDay
 
 data class TimetableMeta(val courseName: String, val courseLink: String, var time: Long)
 
-data class TimetableCourse(val meta: TimetableMeta, var currentWeek: TimetableWeek, var nextWeek: TimetableWeek)
+data class TimetableCourse(val meta: TimetableMeta, var currentWeek: TimetableWeek, var nextWeek: TimetableWeek)
+
+
+// data classes for the status part
+data class Status(val time: LocalDateTime, val coursesLastUpdate: Date, val mensaLastUpdate: Date, val hsoResponseCode: Int, val swfrResponseCode: Int)