app: add a FAB to reload posts

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

app/src/main/java/dev/msfjarvis/lobsters/MainActivity.kt

@@ -9,8 +9,8 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumnForIndexed
+import androidx.compose.material.FloatingActionButton
 import androidx.compose.material.Scaffold
-import androidx.compose.material.TopAppBar
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.Providers
 import androidx.compose.runtime.ambientOf
@@ -56,7 +56,6 @@ fun LobstersApp(
   val lastIndex = state.value.lastIndex
 
   Scaffold(
-    topBar = { TopAppBar({ Text(text = stringResource(R.string.app_name)) }) },
     bodyContent = {
       if (state.value.isEmpty()) {
         Column(
@@ -82,6 +81,11 @@ fun LobstersApp(
           )
         }
       }
-    }
+    },
+    floatingActionButton = {
+      FloatingActionButton(onClick = { viewModel.refreshPosts() }) {
+        IconResource(resourceId = R.drawable.ic_refresh_24px)
+      }
+    },
   )
 }

app/src/main/java/dev/msfjarvis/lobsters/data/LobstersViewModel.kt

@@ -41,6 +41,11 @@ class LobstersViewModel @ViewModelInject constructor(
     getMorePostsInternal(false)
   }
 
+  fun refreshPosts() {
+    apiPage = 1
+    getMorePostsInternal(true)
+  }
+
   private fun getMorePostsInternal(firstLoad: Boolean) {
     viewModelScope.launch(coroutineExceptionHandler) {
       val newPosts = lobstersApi.getHottestPosts(apiPage)

app/src/main/res/drawable/ic_refresh_24px.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M17.65,6.35c-1.63,-1.63 -3.94,-2.57 -6.48,-2.31 -3.67,0.37 -6.69,3.35 -7.1,7.02C3.52,15.91 7.27,20 12,20c3.19,0 5.93,-1.87 7.21,-4.56 0.32,-0.67 -0.16,-1.44 -0.9,-1.44 -0.37,0 -0.72,0.2 -0.88,0.53 -1.13,2.43 -3.84,3.97 -6.8,3.31 -2.22,-0.49 -4.01,-2.3 -4.48,-4.52C5.31,9.44 8.26,6 12,6c1.66,0 3.14,0.69 4.22,1.78l-1.51,1.51c-0.63,0.63 -0.19,1.71 0.7,1.71H19c0.55,0 1,-0.45 1,-1V6.41c0,-0.89 -1.08,-1.34 -1.71,-0.71l-0.64,0.65z"/>
+</vector>