Improved menu interface

# Conflicts:
#	app/build.gradle.kts

.gitignore

@@ -1,15 +1,33 @@
-*.iml
+# Gradle files
-.gradle
+.gradle/
-/local.properties
+build/
-/.idea/caches
+
-/.idea/libraries
+# Local configuration file (sdk path, etc)
-/.idea/modules.xml
-/.idea/workspace.xml
-/.idea/navEditor.xml
-/.idea/assetWizardSettings.xml
-.DS_Store
-/build
-/captures
-.externalNativeBuild
-.cxx
 local.properties
+
+# Log/OS Files
+*.log
+
+# Android Studio generated files and folders
+captures/
+.externalNativeBuild/
+.cxx/
+*.apk
+output.json
+
+# IntelliJ
+*.iml
+.idea/
+misc.xml
+deploymentTargetDropDown.xml
+render.experimental.xml
+
+# Keystore files
+*.jks
+*.keystore
+
+# Google Services (e.g. APIs or Firebase)
+google-services.json
+
+# Android Profiling
+*.hprof

.idea/gradle.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>

.idea/misc.xml

@@ -1,6 +1,7 @@
+<?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">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" project-jdk-name="jbr-17" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

.idea/vcs.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+    <mapping directory="" vcs="Git" />
   </component>
 </project>

app/build.gradle.kts

@@ -1,6 +1,7 @@
 plugins {
     id("com.android.application")
     id("org.jetbrains.kotlin.android")
+    id("com.google.devtools.ksp") version "1.9.0-1.0.13"
 }
 
 android {
@@ -22,8 +23,10 @@ android {
 
     buildTypes {
         release {
-            isMinifyEnabled = false
+            isMinifyEnabled = true
+            isShrinkResources = true
             proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+            isCrunchPngs = true
         }
     }
     compileOptions {
@@ -48,10 +51,10 @@ android {
 
 dependencies {
 
-    implementation("androidx.core:core-ktx:1.10.1")
+    implementation("androidx.core:core-ktx:1.12.0")
-    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.6.1")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.7.0")
-    implementation("androidx.activity:activity-compose:1.7.0")
+    implementation("androidx.activity:activity-compose:1.8.2")
-    implementation(platform("androidx.compose:compose-bom:2023.08.00"))
+    implementation(platform("androidx.compose:compose-bom:2024.04.00"))
     implementation("androidx.compose.ui:ui")
     implementation("androidx.compose.ui:ui-graphics")
     implementation("androidx.compose.ui:ui-tooling-preview")
@@ -59,8 +62,25 @@ dependencies {
     testImplementation("junit:junit:4.13.2")
     androidTestImplementation("androidx.test.ext:junit:1.1.5")
     androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
-    androidTestImplementation(platform("androidx.compose:compose-bom:2023.08.00"))
+    androidTestImplementation(platform("androidx.compose:compose-bom:2024.04.00"))
     androidTestImplementation("androidx.compose.ui:ui-test-junit4")
     debugImplementation("androidx.compose.ui:ui-tooling")
     debugImplementation("androidx.compose.ui:ui-test-manifest")
+
+    implementation("androidx.navigation:navigation-compose:2.7.7")
+    implementation("io.github.raamcosta.compose-destinations:core:1.0.2-beta")
+    ksp("io.github.raamcosta.compose-destinations:ksp:1.0.2-beta")
+
+    implementation("androidx.compose.material:material-icons-extended:1.6.5")
+
+    implementation("com.google.accompanist:accompanist-permissions:0.34.0")
+    implementation("androidx.camera:camera-camera2:1.3.2")
+    implementation("androidx.camera:camera-lifecycle:1.3.2")
+    implementation("androidx.camera:camera-view:1.3.2")
+    implementation("com.google.mlkit:barcode-scanning:17.2.0")
+
+    implementation("com.squareup.retrofit2:retrofit:2.11.0")
+    implementation("com.squareup.retrofit2:converter-gson:2.11.0")
+    implementation("com.squareup.okhttp3:okhttp:5.0.0-alpha.12")
+    implementation("com.squareup.okhttp3:logging-interceptor:5.0.0-alpha.12")
 }

app/src/main/AndroidManifest.xml

@@ -2,6 +2,12 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-feature android:name="android.hardware.camera"/>
+    <uses-feature android:name="android.hardware.camera.autofocus"/>
+    <uses-permission android:name="android.permission.CAMERA"/>
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
@@ -15,7 +21,6 @@
         <activity
             android:name=".MainActivity"
             android:exported="true"
-            android:label="@string/app_name"
             android:theme="@style/Theme.FlowSchool">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/it/edu/cassandroferminervi/flowschool/MainActivity.kt

@@ -4,12 +4,10 @@ import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.tooling.preview.Preview
+import com.ramcosta.composedestinations.DestinationsNavHost
+import com.ramcosta.composedestinations.NavGraphs
 import it.edu.cassandroferminervi.flowschool.ui.theme.FlowSchoolTheme
 
 class MainActivity : ComponentActivity() {
@@ -17,27 +15,12 @@ class MainActivity : ComponentActivity() {
         super.onCreate(savedInstanceState)
         setContent {
             FlowSchoolTheme {
-                // A surface container using the 'background' color from the theme
+                Surface(
-                Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background) {
+                    modifier = Modifier.fillMaxSize()
-                    Greeting("Android")
+                ) {
+                    DestinationsNavHost(navGraph = NavGraphs.root)
                 }
             }
         }
     }
-}
-
-@Composable
-fun Greeting(name: String, modifier: Modifier = Modifier) {
-    Text(
-            text = "Hello $name!",
-            modifier = modifier
-    )
-}
-
-@Preview(showBackground = true)
-@Composable
-fun GreetingPreview() {
-    FlowSchoolTheme {
-        Greeting("Android")
-    }
 }

app/src/main/java/it/edu/cassandroferminervi/flowschool/remote/ApiService.kt

@@ -0,0 +1,36 @@
+package it.edu.cassandroferminervi.flowschool.remote
+
+import it.edu.cassandroferminervi.flowschool.remote.dto.LoginResult
+import it.edu.cassandroferminervi.flowschool.remote.dto.PresenceResult
+import it.edu.cassandroferminervi.flowschool.remote.dto.TeacherInfoResult
+import retrofit2.Response
+import retrofit2.http.Field
+import retrofit2.http.FormUrlEncoded
+import retrofit2.http.POST
+
+interface ApiService {
+    @FormUrlEncoded
+    @POST("login.php")
+    suspend fun postLogin(
+        @Field("username") code: String,
+        @Field("password") password: String
+    ): Response<LoginResult>
+
+    @FormUrlEncoded
+    @POST("presenza.php")
+    suspend fun postPresence(
+        @Field("token") token: String,
+        @Field("codice") qrcode: String
+    ): Response<PresenceResult>
+
+    @FormUrlEncoded
+    @POST("lista.php")
+    suspend fun postTeacherList(@Field("token") token: String): Response<List<TeacherInfoResult>>
+
+    @FormUrlEncoded
+    @POST("ottieni_prof.php")
+    suspend fun postTeacherInfo(
+        @Field("token") token: String,
+        @Field("profId") teacherId: Int
+    ): Response<TeacherInfoResult>
+}

app/src/main/java/it/edu/cassandroferminervi/flowschool/remote/RetrofitInstance.kt

@@ -0,0 +1,23 @@
+package it.edu.cassandroferminervi.flowschool.remote
+
+import okhttp3.OkHttpClient
+import okhttp3.logging.HttpLoggingInterceptor
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+
+object RetrofitInstance {
+    private val client = OkHttpClient.Builder()
+        .addInterceptor(HttpLoggingInterceptor().apply {
+            level = HttpLoggingInterceptor.Level.BODY
+        })
+        .build()
+
+    val api: ApiService by lazy {
+        Retrofit.Builder()
+            .baseUrl("https://flowschool.riefolo.me/api/")
+            .addConverterFactory(GsonConverterFactory.create())
+            .client(client)
+            .build()
+            .create(ApiService::class.java)
+    }
+}

app/src/main/java/it/edu/cassandroferminervi/flowschool/remote/dto/LoginResult.kt

@@ -0,0 +1,6 @@
+package it.edu.cassandroferminervi.flowschool.remote.dto
+
+import androidx.annotation.Keep
+
+@Keep
+data class LoginResult(val token: String?, val error: String?)

app/src/main/java/it/edu/cassandroferminervi/flowschool/remote/dto/PresenceResult.kt

@@ -0,0 +1,6 @@
+package it.edu.cassandroferminervi.flowschool.remote.dto
+
+import androidx.annotation.Keep
+
+@Keep
+data class PresenceResult(val success: Boolean)

app/src/main/java/it/edu/cassandroferminervi/flowschool/remote/dto/TeacherInfoResult.kt

@@ -0,0 +1,11 @@
+package it.edu.cassandroferminervi.flowschool.remote.dto
+
+import androidx.annotation.Keep
+
+@Keep
+data class TeacherInfoResult(
+    val codice: Int,
+    val nome: String,
+    val cognome: String,
+    val email: String?
+)

app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/CameraScreen.kt

@@ -0,0 +1,57 @@
+package it.edu.cassandroferminervi.flowschool.screens
+
+import android.util.Log
+import androidx.camera.core.CameraSelector
+import androidx.camera.core.ImageAnalysis
+import androidx.camera.core.Preview
+import androidx.camera.lifecycle.ProcessCameraProvider
+import androidx.camera.view.PreviewView
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalLifecycleOwner
+import androidx.compose.ui.viewinterop.AndroidView
+import androidx.core.content.ContextCompat
+import com.ramcosta.composedestinations.navigation.DestinationsNavigator
+import it.edu.cassandroferminervi.flowschool.util.QrAnalyzer
+
+@Composable
+fun CameraScreen(navigator: DestinationsNavigator, token: String) {
+    val localContext = LocalContext.current
+    val lifecycleOwner = LocalLifecycleOwner.current
+    val cameraProviderFuture = remember {
+        ProcessCameraProvider.getInstance(localContext)
+    }
+    AndroidView(
+        modifier = Modifier.fillMaxSize(),
+        factory = { context ->
+            val previewView = PreviewView(context)
+            val preview = Preview.Builder().build()
+            val selector = CameraSelector.Builder()
+                .requireLensFacing(CameraSelector.LENS_FACING_BACK)
+                .build()
+
+            preview.setSurfaceProvider(previewView.surfaceProvider)
+
+            val imageAnalysis = ImageAnalysis.Builder().build()
+            imageAnalysis.setAnalyzer(
+                ContextCompat.getMainExecutor(context),
+                QrAnalyzer(context, navigator, token)
+            )
+
+            runCatching {
+                cameraProviderFuture.get().bindToLifecycle(
+                    lifecycleOwner,
+                    selector,
+                    preview,
+                    imageAnalysis
+                )
+            }.onFailure {
+                Log.e("CAMERA", "Camera bind error ${it.localizedMessage}", it)
+            }
+            previewView
+        }
+    )
+}

app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/HomeScreen.kt

@@ -0,0 +1,108 @@
+package it.edu.cassandroferminervi.flowschool.screens
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Button
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.ElevatedCard
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import com.ramcosta.composedestinations.PermissionScreenDestination
+import com.ramcosta.composedestinations.SearchingScreenDestination
+import com.ramcosta.composedestinations.annotation.Destination
+import com.ramcosta.composedestinations.navigation.DestinationsNavigator
+
+@Destination
+@Composable
+fun HomeScreen(navigator: DestinationsNavigator, token: String) {
+    Column(
+        verticalArrangement = Arrangement.Center,
+        modifier = Modifier
+            .fillMaxSize()
+    ) {
+        ElevatedCard(
+            elevation = CardDefaults.cardElevation(
+                defaultElevation = 6.dp
+            ),
+
+            modifier = Modifier
+                .fillMaxHeight(0.5F)
+                .fillMaxWidth()
+                .padding(25.dp)
+        ) {
+            Text(
+                "Scannerizza codice QR",
+                style = MaterialTheme.typography.headlineMedium,
+                modifier = Modifier
+                    .padding(16.dp)
+            )
+            Text(
+                "Scannerizzando il codice QR generato dinamicamente dal dispositivo situato nella scuola ti permette di segnare la presenza in modo efficiente.",
+                modifier = Modifier
+                    .padding(16.dp)
+            )
+            Box(
+                modifier = Modifier
+                    .fillMaxSize()
+            ) {
+                Button(
+                    onClick = {
+                        navigator.navigate(PermissionScreenDestination(token))
+                    }, modifier = Modifier
+                        .align(Alignment.BottomEnd)
+                        .padding(16.dp)
+                ) {
+                    Text("Prosegui")
+                }
+            }
+        }
+        Spacer(modifier = Modifier.height(8.dp))
+        ElevatedCard(
+            elevation = CardDefaults.cardElevation(
+                defaultElevation = 6.dp
+            ),
+
+            modifier = Modifier
+                .fillMaxHeight()
+                .fillMaxWidth()
+                .padding(25.dp)
+        ) {
+            Text(
+                "Cerca professore",
+                style = MaterialTheme.typography.headlineMedium,
+                modifier = Modifier
+                    .padding(16.dp)
+            )
+            Text(
+                "Cerca il professore sul quale vuoi ottenere informazioni come l'orario di entrata, l'orario di uscita e la classe in cui presiede attualmente.",
+                modifier = Modifier
+                    .padding(16.dp)
+            )
+            Box(
+                modifier = Modifier
+                    .fillMaxSize()
+            ) {
+                Button(
+                    onClick = {
+                        navigator.navigate(SearchingScreenDestination(token))
+                    }, modifier = Modifier
+                        .align(Alignment.BottomEnd)
+                        .padding(16.dp)
+                ) {
+                    Text("Prosegui")
+                }
+            }
+        }
+    }
+}

app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/LoginScreen.kt

@@ -0,0 +1,116 @@
+package it.edu.cassandroferminervi.flowschool.screens
+
+import android.widget.Toast
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Visibility
+import androidx.compose.material.icons.filled.VisibilityOff
+import androidx.compose.material3.Button
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextField
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.text.input.VisualTransformation
+import androidx.compose.ui.unit.dp
+import com.ramcosta.composedestinations.HomeScreenDestination
+import com.ramcosta.composedestinations.annotation.Destination
+import com.ramcosta.composedestinations.navigation.DestinationsNavigator
+import it.edu.cassandroferminervi.flowschool.R
+import it.edu.cassandroferminervi.flowschool.remote.RetrofitInstance
+import kotlinx.coroutines.launch
+
+
+@Destination(start = true)
+@Composable
+fun LoginScreen(navigator: DestinationsNavigator) {
+    var code by remember { mutableStateOf("") }
+    var password by remember { mutableStateOf("") }
+    var passwordVisible by remember { mutableStateOf(false) }
+
+    val coroutineScope = rememberCoroutineScope()
+    val context = LocalContext.current
+
+    Column(
+        verticalArrangement = Arrangement.Center,
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(horizontal = 50.dp)
+    ) {
+        Image(
+            painterResource(id = R.drawable.logo),
+            contentDescription = "Logo",
+            Modifier
+                .size(192.dp)
+                .align(Alignment.CenterHorizontally)
+                .clip(CircleShape)
+        )
+        Spacer(modifier = Modifier.height(64.dp))
+        TextField(
+            value = code,
+            onValueChange = { code = it },
+            label = { Text("Username") },
+            singleLine = true,
+            modifier = Modifier.fillMaxWidth()
+        )
+        Spacer(modifier = Modifier.height(8.dp))
+        TextField(
+            value = password,
+            onValueChange = { password = it },
+            label = { Text("Password") },
+            singleLine = true,
+            visualTransformation = if (passwordVisible) VisualTransformation.None else PasswordVisualTransformation(),
+            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Password),
+            trailingIcon = {
+                val image = if (passwordVisible)
+                    Icons.Filled.Visibility
+                else Icons.Filled.VisibilityOff
+
+                val description = if (passwordVisible) "Nascondi password" else "Mostra password"
+
+                IconButton(onClick = { passwordVisible = !passwordVisible }) {
+                    Icon(imageVector = image, description)
+                }
+            },
+            modifier = Modifier.fillMaxWidth()
+        )
+        Spacer(modifier = Modifier.height(8.dp))
+        Button(onClick = {
+            coroutineScope.launch {
+                val response = RetrofitInstance.api.postLogin(code, password)
+                val loginResult = response.body()
+
+                if (!response.isSuccessful || loginResult == null)
+                    Toast.makeText(context, "Errore del server", Toast.LENGTH_LONG).show()
+                else if (!loginResult.token.isNullOrEmpty() && loginResult.error.isNullOrEmpty())
+                    navigator.navigate(HomeScreenDestination(loginResult.token))
+                else
+                    Toast.makeText(context, loginResult.error, Toast.LENGTH_LONG).show()
+            }
+        }, modifier = Modifier.align(Alignment.End)) {
+            Text("Accedi")
+        }
+    }
+}

app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/PermissionScreen.kt

@@ -0,0 +1,40 @@
+package it.edu.cassandroferminervi.flowschool.screens
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.SideEffect
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import com.google.accompanist.permissions.ExperimentalPermissionsApi
+import com.google.accompanist.permissions.isGranted
+import com.google.accompanist.permissions.rememberPermissionState
+import com.google.accompanist.permissions.shouldShowRationale
+import com.ramcosta.composedestinations.annotation.Destination
+import com.ramcosta.composedestinations.navigation.DestinationsNavigator
+
+@OptIn(ExperimentalPermissionsApi::class)
+@Destination
+@Composable
+fun PermissionScreen(navigator: DestinationsNavigator, token: String) {
+    val cameraPermissionState = rememberPermissionState(android.Manifest.permission.CAMERA)
+
+    if (cameraPermissionState.status.isGranted) {
+        CameraScreen(navigator, token)
+    } else {
+        Box(
+            contentAlignment = Alignment.Center,
+            modifier = Modifier.fillMaxSize()
+        ) {
+            if (cameraPermissionState.status.shouldShowRationale) {
+                Text("Attiva il permesso per la fotocamera dalle impostazioni")
+            } else {
+                SideEffect {
+                    cameraPermissionState.run { launchPermissionRequest() }
+                }
+                Text("Permessi disattivati per la fotocamera")
+            }
+        }
+    }
+}

app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/SearchingScreen.kt

@@ -0,0 +1,104 @@
+package it.edu.cassandroferminervi.flowschool.screens
+
+import android.widget.Toast
+import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+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.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+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.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import com.ramcosta.composedestinations.TeacherScreenDestination
+import com.ramcosta.composedestinations.annotation.Destination
+import com.ramcosta.composedestinations.navigation.DestinationsNavigator
+import it.edu.cassandroferminervi.flowschool.remote.RetrofitInstance
+import it.edu.cassandroferminervi.flowschool.remote.dto.TeacherInfoResult
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+@OptIn(ExperimentalFoundationApi::class)
+@Destination
+@Composable
+fun SearchingScreen(
+    navigator: DestinationsNavigator,
+    token: String,
+) {
+    val context = LocalContext.current
+
+    var professorList by remember { mutableStateOf<List<TeacherInfoResult>>(emptyList()) }
+    var searchText by remember { mutableStateOf("") }
+
+    LaunchedEffect(Unit) {
+        val response = withContext(Dispatchers.IO) {
+            RetrofitInstance.api.postTeacherList(token)
+        }
+        if (response.isSuccessful) {
+            professorList = response.body() ?: emptyList()
+        } else {
+            Toast.makeText(context, "Errore nel server", Toast.LENGTH_SHORT).show()
+        }
+    }
+
+    val groupedByLetter = professorList.sortedWith(compareBy({ it.cognome }, { it.nome }))
+        .groupBy { it.cognome.first().uppercaseChar() }
+
+    Column {
+        OutlinedTextField(
+            value = searchText,
+            onValueChange = { searchText = it },
+            label = { Text("Cerca professore") },
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp)
+        )
+        LazyColumn {
+            groupedByLetter.forEach { (letter, professors) ->
+                stickyHeader {
+                    Text(
+                        text = letter.toString(),
+                        style = TextStyle(fontWeight = FontWeight.Bold),
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .background(Color.LightGray)
+                            .padding(horizontal = 16.dp, vertical = 8.dp)
+                    )
+                }
+                items(professors.filter {
+                    it.nome.contains(searchText, ignoreCase = true) ||
+                            it.cognome.contains(searchText, ignoreCase = true)
+                }) { professor ->
+                    ProfessorItem(navigator = navigator, token = token, professor = professor)
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun ProfessorItem(navigator: DestinationsNavigator, token: String, professor: TeacherInfoResult) {
+    Column(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable(onClick = {
+                navigator.navigate(TeacherScreenDestination(token, professor.codice))
+            })
+            .padding(16.dp)
+    ) {
+        Text(text = "${professor.nome} ${professor.cognome}")
+    }
+}

app/src/main/java/it/edu/cassandroferminervi/flowschool/screens/TeacherScreen.kt

@@ -0,0 +1,59 @@
+package it.edu.cassandroferminervi.flowschool.screens
+
+import android.widget.Toast
+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.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import com.ramcosta.composedestinations.annotation.Destination
+import it.edu.cassandroferminervi.flowschool.remote.RetrofitInstance
+import it.edu.cassandroferminervi.flowschool.remote.dto.TeacherInfoResult
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+@Destination
+@Composable
+fun TeacherScreen(token: String, code: Int) {
+    val context = LocalContext.current
+    var resBody by remember {
+        mutableStateOf(
+            TeacherInfoResult(
+                code,
+                "err",
+                "err",
+                null
+            )
+        )
+    }
+
+    LaunchedEffect(Unit) {
+        val response = withContext(Dispatchers.IO) {
+            RetrofitInstance.api.postTeacherInfo(token, code)
+        }
+
+        if (response.isSuccessful && response.body() != null) {
+            resBody = response.body()!!
+        } else {
+            Toast.makeText(context, "Errore nel server", Toast.LENGTH_SHORT).show()
+        }
+    }
+
+    Column(
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+        modifier = Modifier.fillMaxSize()
+    ) {
+        Text("Nome: ${resBody.nome}")
+        Text("Cognome: ${resBody.cognome}")
+        Text("Email: ${resBody.email}")
+    }
+}

app/src/main/java/it/edu/cassandroferminervi/flowschool/util/QrAnalyzer.kt

@@ -0,0 +1,57 @@
+package it.edu.cassandroferminervi.flowschool.util
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.widget.Toast
+import androidx.camera.core.ImageAnalysis
+import androidx.camera.core.ImageProxy
+import com.google.mlkit.vision.barcode.BarcodeScannerOptions
+import com.google.mlkit.vision.barcode.BarcodeScanning
+import com.google.mlkit.vision.barcode.common.Barcode
+import com.google.mlkit.vision.common.InputImage
+import com.ramcosta.composedestinations.HomeScreenDestination
+import com.ramcosta.composedestinations.navigation.DestinationsNavigator
+import it.edu.cassandroferminervi.flowschool.remote.RetrofitInstance
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+
+class QrAnalyzer(private val context: Context, private val navigator: DestinationsNavigator, val token: String) : ImageAnalysis.Analyzer {
+    private val options = BarcodeScannerOptions.Builder()
+        .setBarcodeFormats(Barcode.FORMAT_QR_CODE)
+        .build()
+
+    private val scanner = BarcodeScanning.getClient(options)
+
+    @SuppressLint("UnsafeOptInUsageError")
+    override fun analyze(imageProxy: ImageProxy) {
+        imageProxy.image
+            ?.let { image ->
+                scanner.process(
+                    InputImage.fromMediaImage(
+                        image, imageProxy.imageInfo.rotationDegrees
+                    )
+                ).addOnSuccessListener { barcode ->
+                    barcode?.takeIf { it.isNotEmpty() }
+                        ?.mapNotNull { it.rawValue }
+                        ?.joinToString(",")
+                        ?.let {
+                            CoroutineScope(Dispatchers.Main).launch {
+                                val response = RetrofitInstance.api.postPresence(token, it)
+                                val resBody = response.body()
+
+                                if (resBody != null && resBody.success) {
+                                        navigator.navigate(HomeScreenDestination(token))
+                                } else {
+                                    Toast.makeText(context, "Errore", Toast.LENGTH_LONG).show()
+                                }
+                            }
+                        }
+                }.addOnCompleteListener {
+                    imageProxy.close()
+                }
+            }
+    }
+
+
+}

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
+    <background android:drawable="@mipmap/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
 </adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
+    <background android:drawable="@mipmap/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
 </adaptive-icon>

build.gradle.kts

@@ -1,5 +1,5 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
-    id("com.android.application") version "8.2.2" apply false
+    id("com.android.application") version "8.3.2" apply false
     id("org.jetbrains.kotlin.android") version "1.9.0" apply false
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Wed Feb 21 15:30:24 CET 2024
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists