Added submodules listing support

src/main/kotlin/app/git/TabState.kt

@@ -217,6 +217,7 @@ enum class RefreshType {
     REPO_STATE,
     ONLY_LOG,
     STASHES,
+    SUBMODULES,
     UNCOMMITED_CHANGES,
     UNCOMMITED_CHANGES_AND_LOG,
     REMOTES,

src/main/kotlin/app/git/submodules/GetSubmodulesUseCase.kt

@@ -0,0 +1,15 @@
+package app.git.submodules
+
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.eclipse.jgit.api.Git
+import org.eclipse.jgit.submodule.SubmoduleStatus
+import javax.inject.Inject
+
+class GetSubmodulesUseCase @Inject constructor() {
+    suspend operator fun invoke(git: Git): Map<String, SubmoduleStatus> = withContext(Dispatchers.IO) {
+        return@withContext git
+            .submoduleStatus()
+            .call()
+    }
+}

src/main/kotlin/app/ui/RepositoryOpen.kt

@@ -209,6 +209,9 @@ fun MainContentView(
                 Stashes(
                     stashesViewModel = tabViewModel.stashesViewModel,
                 )
+                Submodules(
+                    submodulesViewModel = tabViewModel.submodulesViewModel,
+                )
             }
         }
 

src/main/kotlin/app/ui/Submodules.kt

@@ -0,0 +1,62 @@
+package app.ui
+
+import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.unit.dp
+import app.theme.secondaryTextColor
+import app.ui.components.SideMenuPanel
+import app.ui.components.SideMenuSubentry
+import app.ui.components.Tooltip
+import app.viewmodels.SubmodulesViewModel
+import org.eclipse.jgit.submodule.SubmoduleStatus
+
+@OptIn(ExperimentalFoundationApi::class)
+@Composable
+fun Submodules(
+    submodulesViewModel: SubmodulesViewModel,
+) {
+    val submodules by submodulesViewModel.submodules.collectAsState()
+    val isExpanded by submodulesViewModel.isExpanded.collectAsState()
+
+    SideMenuPanel(
+        title = "Submodules",
+        icon = painterResource("topic.svg"),
+        items = submodules,
+        isExpanded = isExpanded,
+        onExpand = { submodulesViewModel.onExpand() },
+        itemContent = { submodule ->
+            SubmoduleLineEntry(
+                submodulePair = submodule,
+            )
+        }
+    )
+}
+
+@OptIn(ExperimentalFoundationApi::class)
+@Composable
+private fun SubmoduleLineEntry(
+    submodulePair: Pair<String, SubmoduleStatus>,
+) {
+    submodulePair.second.type
+    SideMenuSubentry(
+        text = submodulePair.first,
+        iconResourcePath = "topic.svg",
+    ) {
+        val stateName = submodulePair.second.type.toString()
+        Tooltip(stateName) {
+            Text(
+                text = stateName.first().toString(),
+                color = MaterialTheme.colors.secondaryTextColor,
+                style = MaterialTheme.typography.body2,
+                modifier = Modifier.padding(horizontal = 16.dp),
+            )
+        }
+    }
+}

src/main/kotlin/app/viewmodels/SubmodulesViewModel.kt

@@ -0,0 +1,25 @@
+package app.viewmodels
+
+import app.git.submodules.GetSubmodulesUseCase
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import org.eclipse.jgit.api.Git
+import org.eclipse.jgit.lib.Ref
+import org.eclipse.jgit.submodule.SubmoduleStatus
+import javax.inject.Inject
+
+class SubmodulesViewModel @Inject constructor(
+    private val getSubmodulesUseCase: GetSubmodulesUseCase
+): ExpandableViewModel() {
+    private val _submodules = MutableStateFlow<List<Pair<String, SubmoduleStatus>>>(listOf())
+    val submodules: StateFlow<List<Pair<String, SubmoduleStatus>>>
+        get() = _submodules
+
+    private suspend fun loadSubmodules(git: Git) {
+        _submodules.value = getSubmodulesUseCase(git).toList()
+    }
+
+    suspend fun refresh(git: Git) {
+        loadSubmodules(git)
+    }
+}

src/main/kotlin/app/viewmodels/TabViewModel.kt

@@ -44,6 +44,7 @@ class TabViewModel @Inject constructor(
     val statusViewModel: StatusViewModel,
     val menuViewModel: MenuViewModel,
     val stashesViewModel: StashesViewModel,
+    val submodulesViewModel: SubmodulesViewModel,
     val commitChangesViewModel: CommitChangesViewModel,
     val cloneViewModel: CloneViewModel,
     private val getRepositoryStateUseCase: GetRepositoryStateUseCase,
@@ -118,6 +119,7 @@ class TabViewModel @Inject constructor(
                         RefreshType.REPO_STATE -> refreshRepositoryState()
                         RefreshType.ONLY_LOG -> refreshLog()
                         RefreshType.STASHES -> refreshStashes()
+                        RefreshType.SUBMODULES -> refreshSubmodules()
                         RefreshType.UNCOMMITED_CHANGES -> checkUncommitedChanges()
                         RefreshType.UNCOMMITED_CHANGES_AND_LOG -> checkUncommitedChanges(true)
                         RefreshType.REMOTES -> refreshRemotes()
@@ -157,6 +159,12 @@ class TabViewModel @Inject constructor(
         stashesViewModel.refresh(git)
     }
 
+    private fun refreshSubmodules() = tabState.runOperation(
+        refreshType = RefreshType.NONE
+    ) { git ->
+        submodulesViewModel.refresh(git)
+    }
+
     private fun refreshLog() = tabState.runOperation(
         refreshType = RefreshType.NONE,
     ) { git ->
@@ -328,6 +336,7 @@ class TabViewModel @Inject constructor(
         tagsViewModel.refresh(git)
         statusViewModel.refresh(git)
         stashesViewModel.refresh(git)
+        submodulesViewModel.refresh(git)
     }
 
     fun credentialsDenied() {

src/main/resources/topic.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" enable-background="new 0 0 24 24" height="24px" viewBox="0 0 24 24" width="24px" fill="#000000"><g><rect fill="none" height="24" width="24"/><path d="M20,6h-8l-2-2H4C2.9,4,2.01,4.9,2.01,6L2,18c0,1.1,0.9,2,2,2h16c1.1,0,2-0.9,2-2V8C22,6.9,21.1,6,20,6z M14,16H6v-2h8V16z M18,12H6v-2h12V12z"/></g></svg>