Add Sessions feature to Android app

app/src/main/AndroidManifest.xml

@@ -46,5 +46,9 @@
         <activity android:name=".MainActivity" android:exported="false" />
         <activity android:name=".NewNIHFormActivity" android:exported="false" />
         <activity android:name=".SavedNIHFormActivity" android:exported="false" />
+        <activity android:name=".ListSessionActivity" android:exported="false" />
+        <activity android:name=".SessionDetailsActivity" android:exported="false" />
+        <activity android:name=".NewSessionActivity" android:exported="false" />
     </application>
+
 </manifest>

app/src/main/java/com/example/neurology_project_android/ListSessionActivity.kt

@@ -0,0 +1,244 @@
+package com.example.neurology_project_android
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+
+/**
+ * ListSessionActivity - WITH MOCK DATA FOR TESTING
+ * 
+ * This version includes sample/test data so you can see how the UI looks
+ * with actual sessions displayed.
+ * 
+ */
+class ListSessionActivity : ComponentActivity() {
+    private var refreshTrigger by mutableStateOf(0)
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            ListSessionScreen(refreshTrigger)
+        }
+    }
+
+    override fun onResume() {
+        super.onResume()
+        refreshTrigger++
+    }
+}
+
+@Composable
+fun ListSessionScreen(refreshTrigger: Int) {
+    val context = LocalContext.current
+    val sessionManager = remember { SessionManager(context) }
+    val username = sessionManager.fetchUsername() ?: "anonymous"
+
+    // State to hold the list of sessions
+    var savedSessions by remember { mutableStateOf<List<Session>>(emptyList()) }
+
+    // MOCK DATA - Replace this section when backend is ready
+    LaunchedEffect(refreshTrigger) {
+        // Option 1: Try to fetch real data from server
+        // val fetchedSessions = SessionManagerApi.fetchSessionsForUser(username, sessionManager.client)
+
+        // Option 2: If no data from server, use mock data
+        val mockSessions = listOf(
+            Session(
+                id = 1,
+                sessionId = "session-001",
+                date = "10/29/2025",
+                time = "2:17pm",
+                attendingDoctors = "Dr. Smith, Dr. Johnson",
+                patientName = "John Doe",
+                patientDob = "09/26/1985",
+                formIds = "1,2",
+                videoUrl = "https://example.com/video1.mp4",
+                videoSize = "50MB",
+                aiFormOutput = "NIHSS Score: 8 - Moderate stroke severity",
+                username = username
+            ),
+            Session(
+                id = 2,
+                sessionId = "session-002",
+                date = "10/28/2025",
+                time = "3:45pm",
+                attendingDoctors = "Dr. Williams, Dr. Brown, Dr. Davis",
+                patientName = "Jane Smith",
+                patientDob = "03/15/1972",
+                formIds = "3",
+                videoUrl = "https://example.com/video2.mp4",
+                videoSize = "65MB",
+                aiFormOutput = "NIHSS Score: 3 - Minor stroke severity",
+                username = username
+            ),
+            Session(
+                id = 3,
+                sessionId = "session-003",
+                date = "10/27/2025",
+                time = "10:30am",
+                attendingDoctors = "Dr. Miller",
+                patientName = "Robert Johnson",
+                patientDob = "11/08/1968",
+                formIds = "4,5,6",
+                videoUrl = "https://example.com/video3.mp4",
+                videoSize = "42MB",
+                aiFormOutput = "NIHSS Score: 15 - Severe stroke",
+                username = username
+            ),
+            Session(
+                id = 4,
+                sessionId = "session-004",
+                date = "10/26/2025",
+                time = "9:15am",
+                attendingDoctors = "Dr. Garcia, Dr. Martinez",
+                patientName = "Mary Wilson",
+                patientDob = "07/22/1990",
+                formIds = "7",
+                videoUrl = "https://example.com/video4.mp4",
+                videoSize = "38MB",
+                aiFormOutput = "NIHSS Score: 1 - Very minor symptoms",
+                username = username
+            ),
+            Session(
+                id = 5,
+                sessionId = "session-005",
+                date = "10/25/2025",
+                time = "1:00pm",
+                attendingDoctors = "Dr. Anderson",
+                patientName = "Michael Brown",
+                patientDob = "12/30/1956",
+                formIds = "8,9",
+                videoUrl = "https://example.com/video5.mp4",
+                videoSize = "55MB",
+                aiFormOutput = "NIHSS Score: 12 - Moderate to severe stroke",
+                username = username
+            )
+        )
+
+        savedSessions = mockSessions
+
+        // TO USE REAL DATA INSTEAD:
+        // 1. Comment out the mockSessions lines above
+        // 2. Uncomment this line:
+        // savedSessions = SessionManagerApi.fetchSessionsForUser(username, sessionManager.client)
+    }
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(Color.White)
+            .padding(24.dp)
+    ) {
+        // Header Row with title and "New Session" button
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(top = 10.dp, bottom = 24.dp),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.SpaceBetween
+        ) {
+            Text(
+                text = "Saved Sessions",
+                fontSize = 28.sp,
+                fontWeight = FontWeight.Bold
+            )
+
+            TextButton(
+                onClick = {
+                    val intent = Intent(context, NewSessionActivity::class.java)
+                    context.startActivity(intent)
+                }
+            ) {
+                Text(text = "New Session", fontSize = 16.sp)
+            }
+        }
+
+        // Scrollable list of sessions
+        LazyColumn(
+            modifier = Modifier.fillMaxSize(),
+            verticalArrangement = Arrangement.spacedBy(12.dp)
+        ) {
+            items(savedSessions) { session ->
+                SessionItem(
+                    session = session,
+                    onClick = {
+                        // Navigate to session details screen
+                        val intent = Intent(context, SessionDetailsActivity::class.java).apply {
+                            putExtra("sessionId", session.id)
+                            putExtra("sessionIdString", session.sessionId)
+                            putExtra("date", session.date)
+                            putExtra("time", session.time)
+                            putExtra("attendingDoctors", session.attendingDoctors)
+                            putExtra("patientName", session.patientName)
+                            putExtra("patientDob", session.patientDob)
+                            putExtra("formIds", session.formIds)
+                            putExtra("videoUrl", session.videoUrl)
+                            putExtra("videoSize", session.videoSize)
+                            putExtra("aiFormOutput", session.aiFormOutput)
+                            putExtra("username", session.username)
+                        }
+                        context.startActivity(intent)
+                    }
+                )
+            }
+        }
+    }
+}
+
+/**
+ * SessionItem Composable
+ * 
+ * Displays a single session card in the list.
+ * Shows the date/time and a "View" button.
+ */
+@Composable
+fun SessionItem(session: Session, onClick: () -> Unit) {
+    Card(
+        shape = MaterialTheme.shapes.medium,
+        elevation = CardDefaults.cardElevation(defaultElevation = 4.dp),
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable(onClick = onClick)
+    ) {
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.SpaceBetween
+        ) {
+            Column {
+                // Display date and time
+                Text(
+                    text = "Date: ${session.date}",
+                    fontSize = 18.sp,
+                    fontWeight = FontWeight.Bold
+                )
+                Text(
+                    text = "Time: ${session.time}",
+                    fontSize = 14.sp,
+                    color = Color.Gray
+                )
+            }
+
+            Button(onClick = onClick) {
+                Text(text = "View")
+            }
+        }
+    }
+}

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

@@ -265,7 +265,7 @@ class MainActivity : ComponentActivity() {
                 OnlineNowSection(peers) // No need for additional state
             }
 
-            NIHFormsButton()
+            SessionsAndFormsButtons()
         }
     }
 }
@@ -350,20 +350,42 @@ fun PeerIdSection(peerId: String) {
 
 
 @Composable
-fun NIHFormsButton() {
+fun SessionsAndFormsButtons() {
     val context = LocalContext.current
 
-    Button(
-        onClick = {
-            val intent = Intent(context, ListNIHFormActivity::class.java)
-            context.startActivity(intent)
-        },
+    Row(
         modifier = Modifier
             .fillMaxWidth()
             .padding(vertical = 16.dp),
-        shape = RoundedCornerShape(8.dp)
+        horizontalArrangement = Arrangement.spacedBy(12.dp)
     ) {
-        Text(text = "NIH Forms")
+        // Sessions Button
+        Button(
+            onClick = {
+                val intent = Intent(context, ListSessionActivity::class.java)
+                context.startActivity(intent)
+            },
+            modifier = Modifier
+                .weight(1f)
+                .height(48.dp),
+            shape = RoundedCornerShape(8.dp)
+        ) {
+            Text(text = "Sessions")
+        }
+
+        // NIH Forms Button
+        Button(
+            onClick = {
+                val intent = Intent(context, ListNIHFormActivity::class.java)
+                context.startActivity(intent)
+            },
+            modifier = Modifier
+                .weight(1f)
+                .height(48.dp),
+            shape = RoundedCornerShape(8.dp)
+        ) {
+            Text(text = "NIH Forms")
+        }
     }
 }
 

app/src/main/java/com/example/neurology_project_android/NewSessionActivity.kt

@@ -0,0 +1,62 @@
+package com.example.neurology_project_android
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+
+/**
+ * NewSessionActivity (PLACEHOLDER)
+ * 
+ */
+class NewSessionActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            NewSessionPlaceholderScreen()
+        }
+    }
+}
+
+@Composable
+fun NewSessionPlaceholderScreen() {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(Color.White)
+            .padding(24.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Text(
+            text = "New Session",
+            fontSize = 28.sp,
+            fontWeight = FontWeight.Bold
+        )
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        Text(
+            text = "This feature is coming soon!",
+            fontSize = 18.sp,
+            color = Color.Gray
+        )
+
+        Spacer(modifier = Modifier.height(32.dp))
+
+        Text(
+            text = "TODO: Implement session creation",
+            fontSize = 14.sp,
+            color = Color.Gray
+        )
+    }
+}