[API/Mobidziennik] Add Web timetable scrapper. (#66)

* [API] Add utils for getting teacher, subject and team by name. * [API/Mobidziennik] Add Web timetable scrapper. * [API/Mobidziennik] Add missing Regexes.
2024-11-24 10:54:36 -06:00 · 2021-09-09 23:14:24 +02:00 · 2021-09-09 23:14:24 +02:00 · dd6a2c0979
commit dd6a2c0979
parent 9fdee6e0c7
16 changed files with 484 additions and 76 deletions
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/Regexes.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/Regexes.kt
@ -117,6 +117,17 @@ object Regexes {
    }


+    val MOBIDZIENNIK_TIMETABLE_TOP by lazy {
+        """<div class="plansc_top">.+?</div></div>""".toRegex(DOT_MATCHES_ALL)
+    }
+    val MOBIDZIENNIK_TIMETABLE_CELL by lazy {
+        """<div class="plansc_cnt_w" style="(.+?)">.+?style="(.+?)".+?title="(.+?)".+?>\s+(.+?)\s+</div>""".toRegex(DOT_MATCHES_ALL)
+    }
+    val MOBIDZIENNIK_TIMETABLE_LEFT by lazy {
+        """<div class="plansc_godz">.+?</div></div>""".toRegex(DOT_MATCHES_ALL)
+    }
+
+

    val IDZIENNIK_LOGIN_HIDDEN_FIELDS by lazy {
        """<input type="hidden".+?name="([A-z0-9_]+)?".+?value="([A-z0-9_+-/=]+)?".+?>""".toRegex(DOT_MATCHES_ALL)
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/DataEdudziennik.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/DataEdudziennik.kt
@ -111,37 +111,6 @@ class DataEdudziennik(app: App, profile: Profile?, loginStore: LoginStore) : Dat
    val courseStudentEndpoint: String
        get() = "Course/$studentId/"

-    fun getSubject(longId: String, name: String): Subject {
-        val id = longId.crc32()
-        return subjectList.singleOrNull { it.id == id } ?: run {
-            val subject = Subject(profileId, id, name, name)
-            subjectList.put(id, subject)
-            subject
-        }
-    }
-
-    fun getTeacher(firstName: String, lastName: String, longId: String? = null): Teacher {
-        val name = "$firstName $lastName".fixName()
-        val id = name.crc32()
-        return teacherList.singleOrNull { it.id == id }?.also {
-            if (longId != null && it.loginId == null) it.loginId = longId
-        } ?: run {
-            val teacher = Teacher(profileId, id, firstName, lastName, longId)
-            teacherList.put(id, teacher)
-            teacher
-        }
-    }
-
-    fun getTeacherByFirstLast(nameFirstLast: String, longId: String? = null): Teacher {
-        val nameParts = nameFirstLast.split(" ")
-        return getTeacher(nameParts[0], nameParts[1], longId)
-    }
-
-    fun getTeacherByLastFirst(nameLastFirst: String, longId: String? = null): Teacher {
-        val nameParts = nameLastFirst.split(" ")
-        return getTeacher(nameParts[1], nameParts[0], longId)
-    }
-
    fun getEventType(longId: String, name: String): EventType {
        val id = longId.crc16().toLong()
        return eventTypes.singleOrNull { it.id == id } ?: run {
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebExams.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebExams.kt
@ -40,7 +40,7 @@ class EdudziennikWebExams(override val data: DataEdudziennik,
                val subjectId = EDUDZIENNIK_SUBJECT_ID.find(subjectElement.attr("href"))?.get(1)
                        ?: return@forEach
                val subjectName  = subjectElement.text().trim()
-                val subject = data.getSubject(subjectId, subjectName)
+                val subject = data.getSubject(subjectId.crc32(), subjectName)

                val dateString = examElement.child(2).text().trim()
                if (dateString.isBlank()) return@forEach
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebGrades.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebGrades.kt
@ -53,7 +53,7 @@ class EdudziennikWebGrades(override val data: DataEdudziennik,

                val subjectId = subjectElement.id().trim()
                val subjectName = subjectElement.child(0).text().trim()
-                val subject = data.getSubject(subjectId, subjectName)
+                val subject = data.getSubject(subjectId.crc32(), subjectName)

                val gradeType = when {
                    subjectElement.select("#sum").text().isNotBlank() -> TYPE_POINT_SUM
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebHomework.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebHomework.kt
@ -41,7 +41,7 @@ class EdudziennikWebHomework(override val data: DataEdudziennik,
                    val subjectId = EDUDZIENNIK_SUBJECT_ID.find(subjectElement.attr("href"))?.get(1)
                            ?: return@forEach
                    val subjectName = subjectElement.text()
-                    val subject = data.getSubject(subjectId, subjectName)
+                    val subject = data.getSubject(subjectId.crc32(), subjectName)

                    val lessons = data.app.db.timetableDao().getAllForDateNow(profileId, date)
                    val startTime = lessons.firstOrNull { it.subjectId == subject.id }?.displayStartTime
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebStart.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebStart.kt
@ -73,7 +73,7 @@ class EdudziennikWebStart(override val data: DataEdudziennik,
        EDUDZIENNIK_SUBJECTS_START.findAll(text).forEach {
            val id = it[1].trim()
            val name = it[2].trim()
-            data.getSubject(id, name)
+            data.getSubject(id.crc32(), name)
        }
    }
 }
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebTimetable.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebTimetable.kt
@ -5,6 +5,7 @@
 package pl.szczodrzynski.edziennik.data.api.edziennik.edudziennik.data.web

 import org.jsoup.Jsoup
+import pl.szczodrzynski.edziennik.crc32
 import pl.szczodrzynski.edziennik.data.api.Regexes.EDUDZIENNIK_SUBJECT_ID
 import pl.szczodrzynski.edziennik.data.api.Regexes.EDUDZIENNIK_TEACHER_ID
 import pl.szczodrzynski.edziennik.data.api.edziennik.edudziennik.DataEdudziennik
@ -89,7 +90,7 @@ class EdudziennikWebTimetable(override val data: DataEdudziennik,
                        val subjectId = EDUDZIENNIK_SUBJECT_ID.find(subjectElement.attr("href"))?.get(1)
                                ?: return@forEachIndexed
                        val subjectName = subjectElement.text().trim()
-                        val subject = data.getSubject(subjectId, subjectName)
+                        val subject = data.getSubject(subjectId.crc32(), subjectName)

                        /* Getting teacher */

--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/mobidziennik/MobidziennikFeatures.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/mobidziennik/MobidziennikFeatures.kt
@ -18,6 +18,7 @@ const val ENDPOINT_MOBIDZIENNIK_WEB_ATTENDANCE          = 2050
 const val ENDPOINT_MOBIDZIENNIK_WEB_MANUALS             = 2100
 const val ENDPOINT_MOBIDZIENNIK_WEB_ACCOUNT_EMAIL       = 2200
 const val ENDPOINT_MOBIDZIENNIK_WEB_HOMEWORK            = 2300 // not used as an endpoint
+const val ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE           = 2400
 const val ENDPOINT_MOBIDZIENNIK_API2_MAIN               = 3000

 val MobidziennikFeatures = listOf(
@ -38,6 +39,12 @@ val MobidziennikFeatures = listOf(



+        /**
+         * Timetable - web scraping - does nothing if the API_MAIN timetable is enough.
+         */
+        Feature(LOGIN_TYPE_MOBIDZIENNIK, FEATURE_TIMETABLE, listOf(
+                ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE to LOGIN_METHOD_MOBIDZIENNIK_WEB
+        ), listOf(LOGIN_METHOD_MOBIDZIENNIK_WEB, LOGIN_METHOD_MOBIDZIENNIK_WEB)),
        /**
         * Agenda - "API" + web scraping.
         */
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/mobidziennik/data/MobidziennikData.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/mobidziennik/data/MobidziennikData.kt
@ -84,6 +84,10 @@ class MobidziennikData(val data: DataMobidziennik, val onSuccess: () -> Unit) {
                data.startProgress(R.string.edziennik_progress_endpoint_lucky_number)
                MobidziennikWebManuals(data, lastSync, onSuccess)
            }*/
+            ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE-> {
+                data.startProgress(R.string.edziennik_progress_endpoint_timetable)
+                MobidziennikWebTimetable(data, lastSync, onSuccess)
+            }
            else -> onSuccess(endpointId)
        }
    }
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/mobidziennik/data/web/MobidziennikWebTimetable.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/mobidziennik/data/web/MobidziennikWebTimetable.kt
@ -0,0 +1,333 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-9-8.
+ */
+
+package pl.szczodrzynski.edziennik.data.api.edziennik.mobidziennik.data.web
+
+import android.annotation.SuppressLint
+import org.jsoup.Jsoup
+import pl.szczodrzynski.edziennik.*
+import pl.szczodrzynski.edziennik.data.api.Regexes
+import pl.szczodrzynski.edziennik.data.api.edziennik.mobidziennik.DataMobidziennik
+import pl.szczodrzynski.edziennik.data.api.edziennik.mobidziennik.ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE
+import pl.szczodrzynski.edziennik.data.api.edziennik.mobidziennik.data.MobidziennikWeb
+import pl.szczodrzynski.edziennik.data.db.entity.Lesson
+import pl.szczodrzynski.edziennik.data.db.entity.Metadata
+import pl.szczodrzynski.edziennik.data.db.entity.SYNC_ALWAYS
+import pl.szczodrzynski.edziennik.utils.models.Date
+import pl.szczodrzynski.edziennik.utils.models.Time
+import pl.szczodrzynski.edziennik.utils.models.Week
+import kotlin.collections.set
+import kotlin.text.replace
+
+class MobidziennikWebTimetable(
+    override val data: DataMobidziennik,
+    override val lastSync: Long?,
+    val onSuccess: (endpointId: Int) -> Unit
+) : MobidziennikWeb(data, lastSync) {
+    companion object {
+        private const val TAG = "MobidziennikWebTimetable"
+    }
+
+    private val rangesH = mutableMapOf<ClosedFloatingPointRange<Float>, Date>()
+    private val hoursV = mutableMapOf<Int, Pair<Time, Int?>>()
+    private var startDate: Date
+
+    private fun parseCss(css: String): Map<String, String> {
+        return css.split(";").mapNotNull {
+            val spl = it.split(":")
+            if (spl.size != 2)
+                return@mapNotNull null
+            return@mapNotNull spl[0].trim() to spl[1].trim()
+        }.toMap()
+    }
+
+    private fun getRangeH(h: Float): Date? {
+        return rangesH.entries.firstOrNull {
+            h in it.key
+        }?.value
+    }
+
+    private fun stringToDate(date: String): Date? {
+        val items = date.split(" ")
+        val day = items.getOrNull(0)?.toIntOrNull() ?: return null
+        val year = items.getOrNull(2)?.toIntOrNull() ?: return null
+        val month = when (items.getOrNull(1)) {
+            "stycznia" -> 1
+            "lutego" -> 2
+            "marca" -> 3
+            "kwietnia" -> 4
+            "maja" -> 5
+            "czerwca" -> 6
+            "lipca" -> 7
+            "sierpnia" -> 8
+            "września" -> 9
+            "października" -> 10
+            "listopada" -> 11
+            "grudnia" -> 12
+            else -> return null
+        }
+        return Date(year, month, day)
+    }
+
+    init {
+        val currentWeekStart = Week.getWeekStart()
+        val nextWeekEnd = Week.getWeekEnd().stepForward(0, 0, 7)
+        if (Date.getToday().weekDay > 4) {
+            currentWeekStart.stepForward(0, 0, 7)
+        }
+        startDate = data.arguments?.getString("weekStart")?.let {
+            Date.fromY_m_d(it)
+        } ?: currentWeekStart
+
+        val syncFutureDate = startDate > nextWeekEnd
+        // TODO: 2021-09-09 make DataRemoveModel keep extra lessons
+        val syncExtraLessons = false && System.currentTimeMillis() - (lastSync ?: 0) > 2 * DAY * MS
+        if (!syncFutureDate && !syncExtraLessons) {
+            onSuccess(ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE)
+        }
+        else {
+            val types = when {
+                syncFutureDate -> mutableListOf("podstawowy")//, "pozalekcyjny")
+                syncExtraLessons -> mutableListOf("pozalekcyjny")
+                else -> mutableListOf()
+            }
+
+            syncTypes(types, startDate) {
+                // set as synced now only when not syncing future date
+                // (to avoid waiting 2 days for normal sync after future sync)
+                if (syncExtraLessons)
+                    data.setSyncNext(ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE, SYNC_ALWAYS)
+                onSuccess(ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE)
+            }
+        }
+    }
+
+    private fun syncTypes(types: MutableList<String>, startDate: Date, onSuccess: () -> Unit) {
+        if (types.isEmpty()) {
+            onSuccess()
+            return
+        }
+        val type = types.removeAt(0)
+        webGet(TAG, "/dziennik/planlekcji?typ=$type&tydzien=${startDate.stringY_m_d}") { html ->
+            MobidziennikLuckyNumberExtractor(data, html)
+            readRangesH(html)
+            readRangesV(html)
+            readLessons(html)
+            syncTypes(types, startDate, onSuccess)
+        }
+    }
+
+    private fun readRangesH(html: String) {
+        val htmlH = Regexes.MOBIDZIENNIK_TIMETABLE_TOP.find(html) ?: return
+        val docH = Jsoup.parse(htmlH.value)
+
+        var posH = 0f
+        for (el in docH.select("div > div")) {
+            val css = parseCss(el.attr("style"))
+            val width = css["width"]
+                ?.trimEnd('%')
+                ?.toFloatOrNull()
+                ?: continue
+            val value = stringToDate(el.attr("title"))
+                ?: continue
+
+            val range = posH.rangeTo(posH + width)
+            posH += width
+
+            rangesH[range] = value
+        }
+    }
+
+    private fun readRangesV(html: String) {
+        val htmlV = Regexes.MOBIDZIENNIK_TIMETABLE_LEFT.find(html) ?: return
+        val docV = Jsoup.parse(htmlV.value)
+
+        for (el in docV.select("div > div")) {
+            val css = parseCss(el.attr("style"))
+            val top = css["top"]
+                ?.trimEnd('%')
+                ?.toFloatOrNull()
+                ?: continue
+            val values = el.text().split(" ")
+
+            val time = values.getOrNull(0)?.let {
+                Time.fromH_m(it)
+            } ?: continue
+            val num = values.getOrNull(1)?.toIntOrNull()
+
+            hoursV[(top * 100).toInt()] = time to num
+        }
+    }
+
+    private val whitespaceRegex = "\\s+".toRegex()
+    private val classroomRegex = "\\((.*)\\)".toRegex()
+    private fun cleanup(str: String): List<String> {
+        return str
+            .replace(whitespaceRegex, " ")
+            .replace("\n", "")
+            .replace("&lt;small&gt;", "$")
+            .replace("&lt;/small&gt;", "$")
+            .replace("&lt;br /&gt;", "\n")
+            .replace("&lt;br/&gt;", "\n")
+            .replace("&lt;br&gt;", "\n")
+            .replace("<br />", "\n")
+            .replace("<br/>", "\n")
+            .replace("<br>", "\n")
+            .replace("<b>", "%")
+            .replace("</b>", "%")
+            .replace("<span>", "")
+            .replace("</span>", "")
+            .split("\n")
+            .map { it.trim() }
+    }
+
+    @SuppressLint("LongLogTag", "LogNotTimber")
+    private fun readLessons(html: String) {
+        val matches = Regexes.MOBIDZIENNIK_TIMETABLE_CELL.findAll(html)
+
+        val noLessonDays = mutableListOf<Date>()
+        for (i in 0..6) {
+            noLessonDays.add(startDate.clone().stepForward(0, 0, i))
+        }
+
+        for (match in matches) {
+            val css = parseCss("${match[1]};${match[2]}")
+            val left = css["left"]?.trimEnd('%')?.toFloatOrNull() ?: continue
+            val top = css["top"]?.trimEnd('%')?.toFloatOrNull() ?: continue
+            val width = css["width"]?.trimEnd('%')?.toFloatOrNull() ?: continue
+            val height = css["height"]?.trimEnd('%')?.toFloatOrNull() ?: continue
+
+            val posH = left + width / 2f
+            val topInt = (top * 100).toInt()
+            val bottomInt = ((top + height) * 100).toInt()
+
+            val lessonDate = getRangeH(posH) ?: continue
+            val (startTime, lessonNumber) = hoursV[topInt] ?: continue
+            val endTime = hoursV[bottomInt]?.first ?: continue
+
+            noLessonDays.remove(lessonDate)
+
+            var typeName: String? = null
+            var subjectName: String? = null
+            var teacherName: String? = null
+            var classroomName: String? = null
+            var teamName: String? = null
+            val items = (cleanup(match[3]) + cleanup(match[4])).toMutableList()
+
+            var length = 0
+            while (items.isNotEmpty() && length != items.size) {
+                length = items.size
+                val toRemove = mutableListOf<String?>()
+                items.forEachIndexed { i, item ->
+                    when {
+                        item.isEmpty() ->
+                            toRemove.add(item)
+                        item.contains(":") && item.contains(" - ") ->
+                            toRemove.add(item)
+
+                        item.startsWith("%") -> {
+                            subjectName = item.trim('%')
+                            toRemove.add(item)
+                            toRemove.add(items[0])
+                        }
+
+                        item.startsWith("&") -> {
+                            typeName = item.trim('&')
+                            toRemove.add(item)
+                        }
+                        typeName != null && (item.contains(typeName!!) || item.contains("</small>")) -> {
+                            toRemove.add(item)
+                        }
+
+                        item.contains("(") && item.contains(")") -> {
+                            classroomName = classroomRegex.find(item)?.get(1)
+                            items[i] = item.replace("($classroomName)", "").trim()
+                        }
+                        classroomName != null && item.contains(classroomName!!) -> {
+                            items[i] = item.replace("($classroomName)", "").trim()
+                        }
+
+                        item.contains("class=\"wyjatek tooltip\"") ->
+                            toRemove.add(item)
+                    }
+                }
+                items.removeAll(toRemove)
+            }
+
+            if (items.size == 2 && items[0].contains(" - ")) {
+                val parts = items[0].split(" - ")
+                teamName = parts[0]
+                teacherName = parts[1]
+            }
+            else if (items.size == 2 && typeName?.contains("odwołana") == true) {
+                teamName = items[0]
+            }
+            else if (items.size == 4) {
+                teamName = items[0]
+                teacherName = items[1]
+            }
+
+            val type = when (typeName) {
+                "zastępstwo" -> Lesson.TYPE_CHANGE
+                "lekcja odwołana", "odwołana" -> Lesson.TYPE_CANCELLED
+                else -> Lesson.TYPE_NORMAL
+            }
+            val subject = subjectName?.let { data.getSubject(null, it) }
+            val teacher = teacherName?.let { data.getTeacherByLastFirst(it) }
+            val team = teamName?.let { data.getTeam(
+                id = null,
+                name = it,
+                schoolCode = data.loginServerName ?: return@let null,
+                isTeamClass = false
+            ) }
+
+            Lesson(data.profileId, -1).also {
+                it.type = type
+                if (type == Lesson.TYPE_CANCELLED) {
+                    it.oldDate = lessonDate
+                    it.oldLessonNumber = lessonNumber
+                    it.oldStartTime = startTime
+                    it.oldEndTime = endTime
+                    it.oldSubjectId = subject?.id ?: -1
+                    it.oldTeamId = team?.id ?: -1
+                }
+                else {
+                    it.date = lessonDate
+                    it.lessonNumber = lessonNumber
+                    it.startTime = startTime
+                    it.endTime = endTime
+                    it.subjectId = subject?.id ?: -1
+                    it.teacherId = teacher?.id ?: -1
+                    it.teamId = team?.id ?: -1
+                    it.classroom = classroomName
+                }
+
+                it.id = it.buildId()
+
+                val seen = profile?.empty == false || lessonDate < Date.getToday()
+
+                if (it.type != Lesson.TYPE_NORMAL) {
+                    data.metadataList.add(
+                        Metadata(
+                            data.profileId,
+                            Metadata.TYPE_LESSON_CHANGE,
+                            it.id,
+                            seen,
+                            seen
+                        )
+                    )
+                }
+                data.lessonList += it
+            }
+        }
+
+        for (date in noLessonDays) {
+            data.lessonList += Lesson(data.profileId, date.value.toLong()).also {
+                it.type = Lesson.TYPE_NO_LESSONS
+                it.date = date
+            }
+        }
+    }
+}
+
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/DataPodlasie.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/DataPodlasie.kt
@ -81,39 +81,4 @@ class DataPodlasie(app: App, profile: Profile?, loginStore: LoginStore) : Data(a

    val loginShort: String?
        get() = studentLogin?.split('@')?.get(0)
-
-    fun getSubject(name: String): Subject {
-        val id = name.crc32()
-        return subjectList.singleOrNull { it.id == id } ?: run {
-            val subject = Subject(profileId, id, name, name)
-            subjectList.put(id, subject)
-            subject
-        }
-    }
-
-    fun getTeacher(firstName: String, lastName: String): Teacher {
-        val name = "$firstName $lastName".fixName()
-        return teacherList.singleOrNull { it.fullName == name } ?: run {
-            val id = name.crc32()
-            val teacher = Teacher(profileId, id, firstName, lastName)
-            teacherList.put(id, teacher)
-            teacher
-        }
-    }
-
-    fun getTeam(name: String? = null): Team {
-        if (name == "cała klasa" || name == null) return teamClass ?: run {
-            val id = className!!.crc32()
-            val teamCode = "$schoolShortName:$className"
-            val team = Team(profileId, id, className, Team.TYPE_CLASS, teamCode, -1)
-            teamList.put(id, team)
-            return team
-        } else {
-            val id = name.crc32()
-            val teamCode = "$schoolShortName:$name"
-            val team = Team(profileId, id, name, Team.TYPE_VIRTUAL, teamCode, -1)
-            teamList.put(id, team)
-            return team
-        }
-    }
 }
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiFinalGrades.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiFinalGrades.kt
@ -36,7 +36,7 @@ class PodlasieApiFinalGrades(val data: DataPodlasie, val rows: List<JsonObject>)
            }

            val subjectName = grade.getString("SchoolSubject") ?: return@forEach
-            val subject = data.getSubject(subjectName)
+            val subject = data.getSubject(null, subjectName)

            val addedDate = if (profile.empty) profile.getSemesterStart(semester).inMillis
            else System.currentTimeMillis()
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiGrades.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiGrades.kt
@ -34,7 +34,7 @@ class PodlasieApiGrades(val data: DataPodlasie, val rows: List<JsonObject>) {
            val teacher = data.getTeacher(teacherFirstName, teacherLastName)

            val subjectName = grade.getString("SchoolSubject") ?: return@forEach
-            val subject = data.getSubject(subjectName)
+            val subject = data.getSubject(null, subjectName)

            val addedDate = grade.getString("ReceivedDate")?.let { Date.fromY_m_d(it).inMillis }
                    ?: System.currentTimeMillis()
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiMain.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiMain.kt
@ -22,7 +22,13 @@ class PodlasieApiMain(override val data: DataPodlasie,

    init {
        apiGet(TAG, PODLASIE_API_USER_ENDPOINT) { json ->
-            data.getTeam() // Save the class team when it doesn't exist.
+            // Save the class team when it doesn't exist.
+            data.getTeam(
+                id = null,
+                name = data.className ?: "",
+                schoolCode = data.schoolShortName ?: "",
+                isTeamClass = true
+            )

            json.getInt("LuckyNumber")?.let { PodlasieApiLuckyNumber(data, it) }
            json.getJsonArray("Teacher")?.asJsonObjectList()?.let { PodlasieApiTeachers(data, it) }
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiTimetable.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiTimetable.kt
@ -43,14 +43,21 @@ class PodlasieApiTimetable(val data: DataPodlasie, rows: List<JsonObject>) {
            val startTime = lesson.getString("TimeFrom")?.let { Time.fromH_m_s(it) }
                    ?: return@forEach
            val endTime = lesson.getString("TimeTo")?.let { Time.fromH_m_s(it) } ?: return@forEach
-            val subject = lesson.getString("SchoolSubject")?.let { data.getSubject(it) }
+            val subject = lesson.getString("SchoolSubject")?.let { data.getSubject(null, it) }
                    ?: return@forEach

            val teacherFirstName = lesson.getString("TeacherFirstName") ?: return@forEach
            val teacherLastName = lesson.getString("TeacherLastName") ?: return@forEach
            val teacher = data.getTeacher(teacherFirstName, teacherLastName)

-            val team = lesson.getString("Group")?.let { data.getTeam(it) } ?: return@forEach
+            val team = lesson.getString("Group")?.let {
+                data.getTeam(
+                    id = null,
+                    name = it,
+                    schoolCode = data.schoolShortName ?: "",
+                    isTeamClass = it == "cała klasa"
+                )
+            } ?: return@forEach
            val classroom = lesson.getString("Room")

            Lesson(data.profileId, -1).also {
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/models/Data.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/models/Data.kt
@ -2,6 +2,7 @@ package pl.szczodrzynski.edziennik.data.api.models

 import android.util.LongSparseArray
 import android.util.SparseArray
+import androidx.core.util.set
 import androidx.core.util.size
 import androidx.room.OnConflictStrategy
 import com.google.gson.JsonObject
@ -376,4 +377,108 @@ abstract class Data(val app: App, val profile: Profile?, val loginStore: LoginSt
    fun startProgress(stringRes: Int) {
        callback.onStartProgress(stringRes)
    }
+
+    /*    _    _ _   _ _
+         | |  | | | (_) |
+         | |  | | |_ _| |___
+         | |  | | __| | / __|
+         | |__| | |_| | \__ \
+          \____/ \__|_|_|__*/
+    fun getSubject(id: Long?, name: String, shortName: String = name): Subject {
+        var subject = subjectList.singleOrNull { it.id == id }
+        if (subject == null)
+            subject = subjectList.singleOrNull { it.longName == name }
+        if (subject == null)
+            subject = subjectList.singleOrNull { it.shortName == name }
+
+        if (subject == null) {
+            subject = Subject(
+                profileId,
+                id ?: name.crc32(),
+                name,
+                shortName
+            )
+            subjectList[subject.id] = subject
+        }
+        return subject
+    }
+
+    fun getTeam(id: Long?, name: String, schoolCode: String, isTeamClass: Boolean = false): Team {
+        if (isTeamClass && teamClass != null)
+            return teamClass as Team
+        var team = teamList.singleOrNull { it.id == id }
+
+        val namePlain = name.replace(" ", "")
+        if (team == null)
+            team = teamList.singleOrNull { it.name.replace(" ", "") == namePlain }
+
+        if (team == null) {
+            team = Team(
+                profileId,
+                id ?: name.crc32(),
+                name,
+                if (isTeamClass) Team.TYPE_CLASS else Team.TYPE_VIRTUAL,
+                "$schoolCode:$name",
+                -1
+            )
+            teamList[team.id] = team
+        }
+        return team
+    }
+
+    fun getTeacher(firstName: String, lastName: String, loginId: String? = null): Teacher {
+        val teacher = teacherList.singleOrNull { it.fullName == "$firstName $lastName" }
+        return validateTeacher(teacher, firstName, lastName, loginId)
+    }
+
+    fun getTeacher(firstNameChar: Char, lastName: String, loginId: String? = null): Teacher {
+        val teacher = teacherList.singleOrNull { it.shortName == "$firstNameChar.$lastName" }
+        return validateTeacher(teacher, firstNameChar.toString(), lastName, loginId)
+    }
+
+    fun getTeacherByLastFirst(nameLastFirst: String, loginId: String? = null): Teacher {
+        val nameParts = nameLastFirst.split(" ")
+        return if (nameParts.size == 1)
+            getTeacher(nameParts[0], "", loginId)
+        else
+            getTeacher(nameParts[1], nameParts[0], loginId)
+    }
+
+    fun getTeacherByFirstLast(nameFirstLast: String, loginId: String? = null): Teacher {
+        val nameParts = nameFirstLast.split(" ")
+        return if (nameParts.size == 1)
+            getTeacher(nameParts[0], "", loginId)
+        else
+            getTeacher(nameParts[0], nameParts[1], loginId)
+    }
+
+    fun getTeacherByFDotLast(nameFDotLast: String, loginId: String? = null): Teacher {
+        val nameParts = nameFDotLast.split(".")
+        return if (nameParts.size == 1)
+            getTeacher(nameParts[0], "", loginId)
+        else
+            getTeacher(nameParts[0][0], nameParts[1], loginId)
+    }
+
+    fun getTeacherByFDotSpaceLast(nameFDotSpaceLast: String, loginId: String? = null): Teacher {
+        val nameParts = nameFDotSpaceLast.split(".")
+        return if (nameParts.size == 1)
+            getTeacher(nameParts[0], "", loginId)
+        else
+            getTeacher(nameParts[0][0], nameParts[1], loginId)
+    }
+
+    private fun validateTeacher(teacher: Teacher?, firstName: String, lastName: String, loginId: String?): Teacher {
+        val obj = teacher ?: Teacher(profileId, -1, firstName, lastName, loginId).apply {
+            id = fullName.crc32()
+            teacherList[id] = this
+        }
+        return obj.also {
+            if (loginId != null && it.loginId != null)
+                it.loginId = loginId
+            if (firstName.length > 1)
+                it.name = firstName
+            it.surname = lastName
+        }
+    }
 }