Add sharing functionality to receive links from other apps (#62)

* Initial plan

* Implement sharing functionality for receiving links from other apps

Co-authored-by: yogeshpaliyal <[email protected]>

* Improve shared text handling to prevent dialog conflicts

Co-authored-by: yogeshpaliyal <[email protected]>

* feat: minor changes

* feat: minor change

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: yogeshpaliyal <[email protected]>
Co-authored-by: Yogesh Choudhary Paliyal <[email protected]>

Author: Copilot

app/src/main/AndroidManifest.xml

@@ -36,6 +36,13 @@
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+            
+            <!-- Intent filter for receiving shared text/links from other apps -->
+            <intent-filter>
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="text/plain" />
+            </intent-filter>
         </activity>
         <activity
             android:name="com.journeyapps.barcodescanner.CaptureActivity"

app/src/main/java/com/yogeshpaliyal/deepr/MainActivity.kt

@@ -1,5 +1,6 @@
 package com.yogeshpaliyal.deepr
 
+import android.content.Intent
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
@@ -8,6 +9,7 @@ import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.mutableStateListOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
@@ -23,25 +25,59 @@ import com.yogeshpaliyal.deepr.ui.screens.SettingsScreen
 import com.yogeshpaliyal.deepr.ui.screens.home.Home
 import com.yogeshpaliyal.deepr.ui.screens.home.HomeScreen
 import com.yogeshpaliyal.deepr.ui.theme.DeeprTheme
+import kotlinx.coroutines.flow.MutableStateFlow
 
 class MainActivity : ComponentActivity() {
+    val sharingLink = MutableStateFlow<String?>(null)
+
     @OptIn(ExperimentalMaterial3Api::class)
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
+
+        getLinkFromIntent(intent)
+
         setContent {
             DeeprTheme {
                 Surface {
-                    Dashboard()
+                    val sharedText = sharingLink.collectAsState().value
+                    Dashboard(sharedText = sharedText) {
+                        sharingLink.value = null
+                    }
                 }
             }
         }
     }
+
+    fun getLinkFromIntent(intent: Intent) {
+        // Check if this activity was started via a share intent
+        val sharedText =
+            when {
+                intent?.action == Intent.ACTION_SEND -> {
+                    if (intent.type == "text/plain") {
+                        intent.getStringExtra(Intent.EXTRA_TEXT)
+                    } else {
+                        null
+                    }
+                }
+                else -> null
+            }
+        sharingLink.value = sharedText
+    }
+
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        getLinkFromIntent(intent)
+    }
 }
 
 @Composable
-fun Dashboard(modifier: Modifier = Modifier) {
-    val backStack = remember { mutableStateListOf<Any>(Home) }
+fun Dashboard(
+    modifier: Modifier = Modifier,
+    sharedText: String? = null,
+    resetSharedText: () -> Unit,
+) {
+    val backStack = remember(sharedText) { mutableStateListOf<Any>(Home) }
 
     NavDisplay(
         backStack = backStack,
@@ -59,7 +95,7 @@ fun Dashboard(modifier: Modifier = Modifier) {
             when (key) {
                 is Home ->
                     NavEntry(key) {
-                        HomeScreen(backStack)
+                        HomeScreen(backStack, sharedText = sharedText, resetSharedText = resetSharedText)
                     }
 
                 is Settings ->

app/src/main/java/com/yogeshpaliyal/deepr/ui/screens/home/Home.kt

@@ -29,6 +29,7 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -73,6 +74,8 @@ fun HomeScreen(
     backStack: SnapshotStateList<Any>,
     modifier: Modifier = Modifier,
     viewModel: AccountViewModel = koinViewModel(),
+    sharedText: String? = null,
+    resetSharedText: () -> Unit,
 ) {
     var isSearchActive by remember { mutableStateOf(false) }
     var searchQuery by remember { mutableStateOf("") }
@@ -94,6 +97,17 @@ fun HomeScreen(
             }
         }
 
+    // Handle shared text from other apps
+    LaunchedEffect(sharedText) {
+        if (!sharedText.isNullOrBlank() && saveDialogInfo == null) {
+            if (isValidDeeplink(sharedText)) {
+                saveDialogInfo = SaveDialogInfo(sharedText, false)
+            } else {
+                Toast.makeText(context, "Invalid deeplink from shared content", Toast.LENGTH_SHORT).show()
+            }
+        }
+    }
+
     Scaffold(
         modifier = modifier.fillMaxSize(),
         topBar = {
@@ -163,6 +177,9 @@ fun HomeScreen(
         bottomBar = {
             HomeBottomContent(hazeState, saveDialogInfo = saveDialogInfo) {
                 saveDialogInfo = it
+                if (it == null) {
+                    resetSharedText()
+                }
             }
         },
     ) { contentPadding ->

app/src/main/java/com/yogeshpaliyal/deepr/ui/screens/home/SaveCompleteDialog.kt

@@ -1,5 +1,6 @@
 package com.yogeshpaliyal.deepr.ui.screens.home
 
+import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.AlertDialog
@@ -46,24 +47,26 @@ fun SaveCompleteDialog(
             Text(stringResource(R.string.save_deeplink))
         },
         text = {
-            Text(stringResource(R.string.save_deeplink_message, localSaveDialogInfo.link))
-            TextField(
-                value = linkName.value,
-                onValueChange = {
-                    linkName.value = it
-                    isError = false
-                },
-                modifier =
-                    Modifier
-                        .fillMaxWidth()
-                        .padding(bottom = 8.dp),
-                placeholder = { Text(stringResource(R.string.enter_link_name)) },
-                supportingText = {
-                    if (isError) {
-                        Text(text = stringResource(R.string.enter_link_name_error))
-                    }
-                },
-            )
+            Column {
+                Text(localSaveDialogInfo.link)
+                TextField(
+                    value = linkName.value,
+                    onValueChange = {
+                        linkName.value = it
+                        isError = false
+                    },
+                    modifier =
+                        Modifier
+                            .fillMaxWidth()
+                            .padding(bottom = 8.dp),
+                    placeholder = { Text(stringResource(R.string.enter_link_name)) },
+                    supportingText = {
+                        if (isError) {
+                            Text(text = stringResource(R.string.enter_link_name_error))
+                        }
+                    },
+                )
+            }
         },
         confirmButton = {
             Button(onClick = {