courses is now CourseList, added lessonSubjectList & lesson request

closes #1, #2

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

@@ -39,6 +39,7 @@ import java.net.URL
 import java.time.LocalDateTime
 import java.util.*
 import kotlin.collections.ArrayList
+import kotlin.collections.HashSet
 import kotlin.concurrent.scheduleAtFixedRate
 
 @RestController
@@ -88,9 +89,15 @@ class APIController {
         }
     }
 
+    @Deprecated("courses is replaced by courseList")
     @RequestMapping("/courses")
     fun courses(): CoursesList {
-        logger.info("courses request at ${LocalDateTime.now()}!")
+        return courseList()
+    }
+
+    @RequestMapping("/courseList")
+    fun courseList(): CoursesList {
+        logger.info("courseList request at ${LocalDateTime.now()}!")
         requestCount++
         return  CoursesList(CoursesMeta(coursesLastUpdate, coursesLinkList.size), coursesLinkList)
     }
@@ -109,8 +116,48 @@ class APIController {
     ): TimetableCourseWeek {
         logger.info("timetable request at ${LocalDateTime.now()}!")
         requestCount++
-        checkTimetableCourse(courseName, week) // check if we need to update and perform the update if so
-        return timetableList.stream().filter { x -> x.meta.courseName == courseName && x.meta.week == week }.findAny().orElse(null)
+        return getTimetable(courseName, week)
+    }
+
+    @RequestMapping("/lessonSubjectList")
+    fun lessonSubjectList(
+        @RequestParam(value = "courseName", defaultValue = "AI4") courseName: String,
+        @RequestParam(value = "week", defaultValue = "0") week: Int
+    ): HashSet<String> {
+        val lessonSubjectList = ArrayList<String>()
+        logger.info("lessonSubjectList request at ${LocalDateTime.now()}!")
+        requestCount++
+
+        // get every lesson subject for the given week
+        val flatMap = getTimetable(courseName, week).timetable.days.flatMap { it.timeslots.asIterable() }
+        flatMap.forEach {
+            it.stream().filter { x -> x.lessonSubject.isNotEmpty() }.findAny().ifPresent { x -> lessonSubjectList.add(x.lessonSubject) }
+        }
+
+        return HashSet(lessonSubjectList)
+    }
+
+    @RequestMapping("/lesson")
+    fun lesson(
+        @RequestParam(value = "courseName", defaultValue = "AI4") courseName: String,
+        @RequestParam(value = "lessonSubject", defaultValue = "Mathematik 4") lessonSubject: String,
+        @RequestParam(value = "week", defaultValue = "0") week: Int
+    ): ArrayList<Lesson> {
+        val lessonList = ArrayList<Lesson>()
+
+        // get all lessons from the weeks timetable
+        val flatMap = getTimetable(courseName, week).timetable.days.flatMap { it.timeslots.asIterable() }
+        flatMap.forEach {
+            it.forEach { lesson ->
+                if(lesson.lessonSubject.contains(lessonSubject)) {
+                    lessonList.add(lesson)
+                }
+            }
+
+            //it.stream().filter { x -> x.lessonSubject.contains(lessonSubject) }.findAny().ifPresent { x -> println("${x.lessonSubject}, ${x.lessonTeacher}") }
+        }
+
+        return lessonList
     }
 
     @RequestMapping("/status")
@@ -213,6 +260,11 @@ class APIController {
         }
     }
 
+    private fun getTimetable(courseName: String, week: Int): TimetableCourseWeek {
+        checkTimetableCourse(courseName, week) // check if we need to update and perform the update if so
+        return timetableList.stream().filter { x -> x.meta.courseName == courseName && x.meta.week == week }.findAny().orElse(null)
+    }
+
     private fun initUpdates() = runBlocking {
         // get all courses on startup
         val jobCourseUpdate = GlobalScope.async{