Complete main activity scroll

.idea/misc.xml

@@ -1,4 +1,3 @@
-<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
   <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="jbr-17" project-jdk-type="JavaSDK">

app/src/main/java/com/example/ssau_schedule/MainActivity.kt

@@ -7,10 +7,10 @@ import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
 import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
@@ -18,7 +18,6 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.imePadding
 import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.pager.HorizontalPager
 import androidx.compose.foundation.pager.rememberPagerState
@@ -27,13 +26,8 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.KeyboardArrowLeft
 import androidx.compose.material.icons.automirrored.filled.KeyboardArrowRight
 import androidx.compose.material.icons.filled.DateRange
-import androidx.compose.material.icons.filled.KeyboardArrowRight
-import androidx.compose.material3.Button
-import androidx.compose.material3.ButtonDefaults
-import androidx.compose.material3.Divider
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Snackbar
@@ -45,21 +39,25 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.clip
 import androidx.compose.ui.draw.shadow
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.core.view.WindowCompat
 import com.example.ssau_schedule.api.Http
 import com.example.ssau_schedule.api.LessonAPI
 import com.example.ssau_schedule.api.LessonAPIErrorMessage
+import com.example.ssau_schedule.components.EmptyDay
 import com.example.ssau_schedule.components.LessonCards
 import com.example.ssau_schedule.data.base.Database
 import com.example.ssau_schedule.data.base.entity.lesson.Lesson
 import com.example.ssau_schedule.data.store.StoreUtils
 import com.example.ssau_schedule.ui.theme.SSAU_ScheduleTheme
+import kotlinx.coroutines.launch
 import kotlinx.serialization.encodeToString
 import kotlinx.serialization.json.Json
 import java.util.Date
@@ -73,8 +71,6 @@ class MainActivity : ComponentActivity() {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
 
-        WindowCompat.setDecorFitsSystemWindows(window, false)
-
         setContent {
             SSAU_ScheduleTheme {
                 MainPage()
@@ -87,14 +83,15 @@ class MainActivity : ComponentActivity() {
         database = remember { Database.getInstance(applicationContext) }
         val snackbarHostState = remember { SnackbarHostState() }
         val lessons = remember { mutableStateOf<List<Lesson>>(listOf()) }
-
+        val animationScope = rememberCoroutineScope()
         val currentDate = remember { mutableStateOf(Date()) }
         val currentDayOfWeek = remember {
-            mutableIntStateOf(Utils.Date.getDateOfWeek(currentDate.value))
+            mutableIntStateOf(Utils.Date.getDayOfWeek(currentDate.value))
         }
         val pagerState = rememberPagerState(
-            initialPage = currentDayOfWeek.intValue-1, pageCount = {Int.MAX_VALUE})
-
+            initialPage = currentDayOfWeek.intValue,
+            pageCount = {Int.MAX_VALUE}
+        )
         LaunchedEffect(false) {
             lessons.value = database.lessonDao().getAll()
         }
@@ -145,13 +142,18 @@ class MainActivity : ComponentActivity() {
                     .padding(padding)
                     .imePadding(),
             ) {
-                Column {
+                Column(Modifier.fillMaxHeight()) {
                     Box(Modifier.fillMaxWidth().height(60.dp)) {
                         Row(Modifier.fillMaxSize().padding(10.dp),
                             horizontalArrangement = Arrangement.SpaceBetween) {
                             Box(Modifier.height(40.dp).width(40.dp)
                                 .shadow(elevation = 6.dp, shape = RoundedCornerShape(50))
-                                .background(MaterialTheme.colorScheme.surface),
+                                .background(MaterialTheme.colorScheme.surface)
+                                .clickable {
+                                    animationScope.launch {
+                                        pagerState.animateScrollToPage(pagerState.currentPage-1)
+                                    }
+                                },
                             ) {
                                 Icon(Icons.AutoMirrored.Filled.KeyboardArrowLeft,
                                     contentDescription = "Forward icon",
@@ -169,7 +171,10 @@ class MainActivity : ComponentActivity() {
                                         contentDescription = "Date icon",
                                         Modifier.height(40.dp).padding(0.dp, 0.dp, 10.dp, 0.dp),
                                         tint = MaterialTheme.colorScheme.primary)
-                                    Text(Utils.Date.format(currentDate.value),
+                                    Text(Utils.Date.format(
+                                            Utils.Date.addDays(currentDate.value,
+                                            pagerState.currentPage-currentDayOfWeek.intValue)
+                                        ),
                                         color = MaterialTheme.colorScheme.primary,
                                         fontWeight = FontWeight.SemiBold,
                                         style = MaterialTheme.typography.bodyLarge)
@@ -177,7 +182,12 @@ class MainActivity : ComponentActivity() {
                             }
                             Box(Modifier.height(40.dp).width(40.dp)
                                 .shadow(elevation = 6.dp, shape = RoundedCornerShape(50))
-                                .background(MaterialTheme.colorScheme.surface),
+                                .background(MaterialTheme.colorScheme.surface)
+                                .clickable {
+                                    animationScope.launch {
+                                        pagerState.animateScrollToPage(pagerState.currentPage+1)
+                                    }
+                                },
                             ) {
                                 Icon(Icons.AutoMirrored.Filled.KeyboardArrowRight,
                                     contentDescription = "Forward icon",
@@ -187,12 +197,20 @@ class MainActivity : ComponentActivity() {
                         }
                     }
                     HorizontalDivider(Modifier.padding(20.dp, 0.dp))
-                    HorizontalPager(state = pagerState) { _ ->
-                        LessonCards(lessons.value)
+                    HorizontalPager(state = pagerState) { page ->
+                        val todayLessons = lessons.value.filter { lesson ->
+                            lesson.dayOfWeek-1 == Utils.Date.getDayOfWeek(
+                                Utils.Date.addDays(currentDate.value, page-currentDayOfWeek.intValue)) &&
+                                    lesson.week == Utils.Date.getWeekOfStudyYear(
+                                Utils.Date.addDays(currentDate.value, page-currentDayOfWeek.intValue))
+                        }.sortedBy { lesson -> lesson.beginTime }
+                        if(todayLessons.isEmpty())
+                            EmptyDay(Modifier)
+                        else
+                            LessonCards(todayLessons)
                     }
                 }
             }
         }
-
     }
 }

app/src/main/java/com/example/ssau_schedule/Utils.kt

@@ -2,6 +2,7 @@ package com.example.ssau_schedule
 
 import android.annotation.SuppressLint
 import android.graphics.Rect
+import android.util.Log
 import android.view.ViewTreeObserver
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
@@ -11,6 +12,7 @@ import androidx.compose.runtime.remember
 import androidx.compose.ui.platform.LocalView
 import kotlinx.serialization.json.Json
 import java.text.SimpleDateFormat
+import java.time.LocalDate
 import java.util.Calendar
 
 class Utils {
@@ -50,12 +52,31 @@ class Utils {
             fun storeFormat(date: java.util.Date): String = StoreDateFormat.format(date)
             fun format(date: java.util.Date): String = DateFormat.format(date)
 
-            fun getDateOfWeek(data: java.util.Date): Int {
+            fun getDayOfWeek(date: java.util.Date): Int {
                 val calendar = Calendar.getInstance()
-                calendar.minimalDaysInFirstWeek = 6
-                calendar.firstDayOfWeek = Calendar.MONDAY
-                calendar.time = data
-                return calendar.get(Calendar.DAY_OF_WEEK)-1
+                calendar.time = date
+                return (calendar.get(Calendar.DAY_OF_WEEK)+5)%7
+            }
+            private fun getWeekOfYear(date: java.util.Date): Int {
+                val calendar = Calendar.getInstance()
+                calendar.time = date
+                return calendar.get(Calendar.WEEK_OF_YEAR) -
+                        (if(calendar.get(Calendar.DAY_OF_WEEK) == 1) 1 else 0)
+            }
+            fun getWeekOfStudyYear(date: java.util.Date): Int {
+                val calendar = Calendar.getInstance()
+                calendar.time = java.util.Date()
+                val year = calendar.get(Calendar.YEAR)
+                calendar.time = parse("${year}-09-01")
+                return getWeekOfYear(date) - (calendar.get(Calendar.WEEK_OF_YEAR) -
+                        (if(calendar.get(Calendar.DAY_OF_WEEK) == 1) 1 else 0))
+            }
+
+            fun addDays(date: java.util.Date, days: Int): java.util.Date {
+                val calendar = Calendar.getInstance()
+                calendar.time = date
+                calendar.add(Calendar.DAY_OF_MONTH, days)
+                return java.util.Date(calendar.timeInMillis)
             }
         }
     }

app/src/main/java/com/example/ssau_schedule/components/EmptyDay.kt

@@ -0,0 +1,41 @@
+package com.example.ssau_schedule.components
+
+import androidx.compose.foundation.border
+import androidx.compose.foundation.background
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.shadow
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.example.ssau_schedule.ui.theme.LessonColors
+
+@Composable
+fun EmptyDay(modifier: Modifier) {
+    Box(Modifier.fillMaxHeight().fillMaxWidth()) {
+        Row(modifier.fillMaxWidth()
+            .padding(14.dp, 8.dp)
+            .shadow(elevation = 6.dp, shape = RoundedCornerShape(12.dp))
+            .background(
+                if(isSystemInDarkTheme()) LessonColors.Background.Dark.Unknown
+                else LessonColors.Background.Light.Unknown
+            ),
+        ) {
+            AutoResizeText("Сегодня нет занятий",
+                modifier = modifier.fillMaxWidth().padding(14.dp),
+                fontSizeRange = FontSizeRange(10.sp, 24.sp),
+                color = MaterialTheme.colorScheme.secondary,
+                style = MaterialTheme.typography.titleLarge,
+                textAlign = TextAlign.Center)
+        }
+    }
+}

app/src/main/java/com/example/ssau_schedule/components/LessonCards.kt

@@ -1,6 +1,5 @@
 package com.example.ssau_schedule.components
 
-import androidx.compose.foundation.ScrollState
 import androidx.compose.foundation.background
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.Arrangement
@@ -12,8 +11,8 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -63,9 +62,11 @@ fun LessonCard(modifier: Modifier, lesson: Lesson) {
 
 @Composable
 fun LessonCards(lessons: List<Lesson>) {
-    Column(Modifier.verticalScroll(ScrollState(0))) {
-        lessons.forEach { lesson ->
-            LessonCard(Modifier, lesson)
+    Box(Modifier.fillMaxHeight().fillMaxWidth()) {
+        LazyColumn {
+            items(lessons.count()) {
+                LessonCard(Modifier, lessons[it])
+            }
         }
     }
 }