From b18dfb1e289c8b26776089a8174a8aaf4bb9f0dc Mon Sep 17 00:00:00 2001
From: Mariano Riefolo <mariano.riefolo@cassandroferminervi.edu.it>
Date: Fri, 1 Mar 2024 17:33:26 +0100
Subject: [PATCH] Added Searching and Teacher screens

---
 .../flowschool/screens/SearchingScreen.kt     | 127 ++++++++++++++++--
 .../flowschool/screens/TeacherScreen.kt       |  23 ++++
 2 files changed, 141 insertions(+), 9 deletions(-)
 create mode 100644 app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/TeacherScreen.kt

diff --git a/app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/SearchingScreen.kt b/app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/SearchingScreen.kt
index bf554b2..36ff7fe 100644
--- a/app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/SearchingScreen.kt
+++ b/app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/SearchingScreen.kt
@@ -1,20 +1,129 @@
 package it.edu.cassandroferminervi.flowschool.screens
 
-import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TextField
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.Alignment
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.ramcosta.composedestinations.TeacherScreenDestination
 import com.ramcosta.composedestinations.annotation.Destination
+import com.ramcosta.composedestinations.navigation.DestinationsNavigator
 
 @Destination
 @Composable
-fun SearchingScreen() {
-    Box (
-        contentAlignment = Alignment.Center,
-        modifier = Modifier.fillMaxSize()
-    ) {
-        Text("Searching screen")
+fun SearchingScreen(navigator: DestinationsNavigator) {
+    val teachers = listOf(
+        "Mario Rossi",
+        "Michele Verdi",
+        "Fabio Bianchi"
+    ).groupBy {
+        it.first()
+    }.toSortedMap()
+        .map {
+            Category(
+                it.key.toString(),
+                items = it.value
+            )
+        }
+    var filter by remember { mutableStateOf("") }
+
+    Column {
+        TextField(
+            value = filter,
+            onValueChange = { filter = it },
+            label = { Text("Cerca") },
+            singleLine = true,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp)
+        )
+        CategorizedLazyColumn(
+            categories = teachers,
+            navigator = navigator,
+            filter = filter
+        )
+    }
+}
+
+data class Category(
+    val name: String,
+    val items: List<String>
+)
+
+@Composable
+private fun CategoryHeader(
+    text: String,
+    modifier: Modifier = Modifier
+) {
+    Text(
+        text = text,
+        fontSize = 16.sp,
+        fontWeight = FontWeight.Bold,
+        modifier = modifier
+            .fillMaxWidth()
+            .background(MaterialTheme.colorScheme.primaryContainer)
+            .padding(16.dp)
+    )
+}
+
+@Composable
+private fun CategoryItem(
+    text: String,
+    navigator: DestinationsNavigator,
+    modifier: Modifier = Modifier
+) {
+    TextButton(onClick = {
+        navigator.navigate(TeacherScreenDestination("test"))
+    }) {
+        Text(
+            text = text,
+            fontSize = 14.sp,
+            modifier = modifier
+                .fillMaxWidth()
+                .background(MaterialTheme.colorScheme.background)
+                .padding(16.dp)
+        )
+    }
+}
+
+@OptIn(ExperimentalFoundationApi::class)
+@Composable
+private fun CategorizedLazyColumn(
+    categories: List<Category>,
+    navigator: DestinationsNavigator,
+    filter: String,
+    modifier: Modifier = Modifier
+) {
+    LazyColumn(modifier) {
+        categories.forEach { category ->
+            if (category.items.any {
+                    it.contains(filter, ignoreCase = true)
+                }) {
+                stickyHeader {
+                    CategoryHeader(category.name)
+                }
+            }
+
+                items(items = category.items.filter {
+                it.contains(filter, ignoreCase = true)
+            }) { text ->
+                CategoryItem(text, navigator)
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/TeacherScreen.kt b/app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/TeacherScreen.kt
new file mode 100644
index 0000000..3c0a14b
--- /dev/null
+++ b/app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/TeacherScreen.kt
@@ -0,0 +1,23 @@
+package it.edu.cassandroferminervi.flowschool.screens
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import com.ramcosta.composedestinations.annotation.Destination
+
+@Destination
+@Composable
+fun TeacherScreen(codice: String) {
+    Column(
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+        modifier = Modifier.fillMaxSize()
+    ) {
+        Text("Codice prof: $codice")
+        Text("Presente: si")
+    }
+}
\ No newline at end of file