android: port deeplinks from develop branch

Fixes #306

Co-Authored-By: Aditya Wasan <adityawasan55@gmail.com>

android/src/main/AndroidManifest.xml

@@ -18,6 +18,43 @@
         <action android:name="android.intent.action.MAIN" />
         <category android:name="android.intent.category.LAUNCHER" />
       </intent-filter>
+      <intent-filter>
+        <action android:name="android.intent.action.VIEW" />
+
+        <category android:name="android.intent.category.DEFAULT" />
+        <category android:name="android.intent.category.BROWSABLE" />
+
+        <data
+            android:ssp="//lobste.rs"
+            android:scheme="https" />
+
+        <data
+            android:host="lobste.rs"
+            android:scheme="https"
+            android:path="/"/>
+      </intent-filter>
+
+      <intent-filter>
+        <action android:name="android.intent.action.VIEW" />
+
+        <category android:name="android.intent.category.DEFAULT" />
+        <category android:name="android.intent.category.BROWSABLE" />
+
+        <data
+            android:host="lobste.rs"
+            android:scheme="https"
+            android:pathPattern="/s/......"/>
+
+        <data
+            android:host="lobste.rs"
+            android:scheme="https"
+            android:pathPattern="/s/....../"/>
+
+        <data
+            android:host="lobste.rs"
+            android:scheme="https"
+            android:pathPattern="/s/....../...*"/>
+      </intent-filter>
     </activity>
   </application>
 </manifest>

android/src/main/kotlin/dev/msfjarvis/claw/android/ui/LobstersApp.kt

@@ -24,9 +24,12 @@ import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavType
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
+import androidx.navigation.navArgument
+import androidx.navigation.navDeepLink
 import androidx.paging.compose.collectAsLazyPagingItems
 import com.google.accompanist.insets.ProvideWindowInsets
 import com.google.accompanist.insets.navigationBarsPadding
@@ -40,6 +43,7 @@ import dev.msfjarvis.claw.android.ui.lists.DatabasePosts
 import dev.msfjarvis.claw.android.ui.lists.HottestPosts
 import dev.msfjarvis.claw.android.ui.navigation.Destinations
 import dev.msfjarvis.claw.android.viewmodel.ClawViewModel
+import dev.msfjarvis.claw.api.LobstersApi
 import dev.msfjarvis.claw.common.R as commonR
 import dev.msfjarvis.claw.common.comments.CommentsPage
 import dev.msfjarvis.claw.common.comments.HTMLConverter
@@ -137,7 +141,12 @@ fun LobstersApp(
           navController,
           startDestination = Destinations.startDestination.getRoute(),
         ) {
-          composable(Destinations.Hottest.getRoute()) {
+          val uri = LobstersApi.BASE_URL
+          composable(
+            route = Destinations.Hottest.getRoute(),
+            deepLinks =
+              listOf(navDeepLink { uriPattern = uri }, navDeepLink { uriPattern = "$uri/" }),
+          ) {
             setWebUri("https://lobste.rs/")
             HottestPosts(
               items = networkPosts,
@@ -158,7 +167,15 @@ fun LobstersApp(
               modifier = Modifier.padding(bottom = paddingValues.calculateBottomPadding()),
             )
           }
-          composable(Destinations.Comments.getRoute("{postId}")) { backStackEntry ->
+          composable(
+            route = Destinations.Comments.getRoute("{postId}"),
+            arguments = listOf(navArgument("postId") { type = NavType.StringType }),
+            deepLinks =
+              listOf(
+                navDeepLink { uriPattern = "$uri/s/{postId}/.*" },
+                navDeepLink { uriPattern = "$uri/s/{postId}" },
+              ),
+          ) { backStackEntry ->
             val postId = requireNotNull(backStackEntry.arguments?.getString("postId"))
             setWebUri("https://lobste.rs/s/$postId")
             CommentsPage(

common/src/commonMain/kotlin/dev/msfjarvis/claw/common/comments/CommentEntry.kt

@@ -61,10 +61,21 @@ fun CommentsHeader(
       Spacer(Modifier.height(4.dp))
 
       if (postDetails.url.isNotBlank()) {
+        // Post links from lobste.rs are of the form $baseUrl/s/$postId/$postTitle
+        // Interestingly, lobste.rs does not actually care for the value of $postTitle, and will
+        // happily accept both a missing as well as a completely arbitrary $postTitle. We
+        // leverage this to create a new URL format which looks like
+        // $baseUrl/s/$postId/$postTitle/r, and does not trigger our deeplinks,
+        // instead opening in the custom tab as we want it to.
         PostLink(
           link = postDetails.url,
           modifier =
-            Modifier.clickable { postActions.viewPost(postDetails.url, postDetails.commentsUrl) },
+            Modifier.clickable {
+              postActions.viewPost(
+                postDetails.url,
+                postDetails.commentsUrl.replaceAfterLast('/', "r")
+              )
+            },
         )
         Spacer(Modifier.height(4.dp))
       }