Support interactive add/stage input flow

app/src/main/java/solutions/tretter/githugandroid/GameModels.kt

@@ -19,6 +19,11 @@ data class CommitNode(
     val message: String,
 )
 
+data class InteractiveAddSession(
+    val target: String? = null,
+    val awaitingUpdateSelection: Boolean = false,
+)
+
 data class RepoState(
     val initialized: Boolean = false,
     val files: List<GitFile> = emptyList(),
@@ -36,6 +41,7 @@ data class RepoState(
     val pushedTags: Set<String> = emptySet(),
     val submodules: Map<String, String> = emptyMap(),
     val maintenanceActions: Set<String> = emptySet(),
+    val interactiveAddSession: InteractiveAddSession? = null,
 )
 
 data class Level(

app/src/main/java/solutions/tretter/githugandroid/GitHugApp.kt

@@ -441,6 +441,7 @@ fun GitHugApp() {
             val submittedText = commandInput.text
             val raw = submittedText.trim()
             if (raw.isBlank()) return
+            val isInteractiveInput = repo.interactiveAddSession != null
 
             showHelpOverlay = false
             showTerminalInputHint = false
@@ -448,7 +449,7 @@ fun GitHugApp() {
             suppressedImeEcho = submittedText
             clearCommandInput(recreateField = true)
 
-            if (commandHistory.lastOrNull() != raw) {
+            if (!isInteractiveInput && commandHistory.lastOrNull() != raw) {
                 commandHistory = commandHistory + raw
             }
             historyIndex = -1
@@ -473,7 +474,7 @@ fun GitHugApp() {
             }
 
             val (newRepo, lines) = runtime.execute(currentLevel, repo, raw)
-            applyCommandResult(raw, newRepo, lines, echoCommand = true)
+            applyCommandResult(raw, newRepo, lines, echoCommand = !isInteractiveInput)
         }
 
         fun showCommandHelp() {

app/src/main/java/solutions/tretter/githugandroid/GitRuntime.kt

@@ -129,6 +129,20 @@ class GitRepositoryRuntime private constructor(
         val shellTokens = GitSandboxEngine.tokenizeShellCommand(command)
         val tokens = shellTokens.map { it.value }
         if (tokens.isEmpty()) return inspectSandbox(level).copy(currentDir = currentRepo.currentDir) to emptyList()
+        if (currentRepo.interactiveAddSession != null) {
+            val (updatedRepo, output) = GitSandboxEngine.execute(currentRepo, command)
+            val newlyStagedPaths = updatedRepo.files.filter { updatedFile ->
+                updatedFile.staged && currentRepo.files.firstOrNull { it.name == updatedFile.name }?.staged != true
+            }.map { it.name }
+            if (newlyStagedPaths.isNotEmpty()) {
+                runGit(nativeGit, workingDir, listOf("add") + newlyStagedPaths)
+            }
+            val inspectedRepo = inspectSandbox(level).copy(
+                currentDir = updatedRepo.currentDir,
+                interactiveAddSession = updatedRepo.interactiveAddSession,
+            )
+            return augmentObservedRepoFacts(updatedRepo, inspectedRepo, tokens) to output
+        }
         val expandedTokens = if (tokens.firstOrNull() == "echo") {
             tokens
         } else {

app/src/main/java/solutions/tretter/githugandroid/GitSandboxEngine.kt

@@ -26,6 +26,9 @@ object GitSandboxEngine {
         val shellParts = tokenizeShellCommand(command)
         val parts = shellParts.map { it.value }
         if (parts.isEmpty()) return repo to emptyList()
+        repo.interactiveAddSession?.let {
+            return handleInteractiveAddInput(repo, command)
+        }
         return when {
             parts[0] == "help" || parts[0] == "?" -> repo to commandReferenceLines()
             parts[0] == "touch" && parts.size >= 2 -> {
@@ -174,7 +177,7 @@ object GitSandboxEngine {
         val candidates = repo.files.filter { file ->
             !file.deleted && (target == null || target == "." || file.name == target || file.name.startsWith(target.trimEnd('/') + "/"))
         }
-        return repo to interactiveAddConsoleLines(candidates)
+        return repo.copy(interactiveAddSession = InteractiveAddSession(target = target)) to interactiveAddConsoleLines(candidates)
     }
 
     private fun interactiveAddConsoleLines(candidates: List<GitFile>): List<String> {
@@ -198,6 +201,69 @@ object GitSandboxEngine {
         }
     }
 
+    private fun handleInteractiveAddInput(repo: RepoState, input: String): Pair<RepoState, List<String>> {
+        val session = repo.interactiveAddSession ?: return repo to emptyList()
+        val answer = input.trim()
+        return if (session.awaitingUpdateSelection) {
+            applyInteractiveAddUpdateSelection(repo, session, answer)
+        } else {
+            when (answer.lowercase()) {
+                "1", "s", "status" -> repo to listOf("What now> $answer") + interactiveAddConsoleLines(interactiveAddCandidates(repo, session.target))
+                "2", "u", "update" -> repo.copy(
+                    interactiveAddSession = session.copy(awaitingUpdateSelection = true),
+                ) to listOf("What now> $answer", "Update>>")
+                "7", "q", "quit" -> repo.copy(interactiveAddSession = null) to listOf("What now> $answer", "Bye.")
+                "8", "h", "help" -> repo to listOf("What now> $answer") + interactiveAddConsoleLines(interactiveAddCandidates(repo, session.target))
+                else -> repo to listOf("What now> $answer", "Huh ($answer)?") + interactiveAddConsoleLines(interactiveAddCandidates(repo, session.target))
+            }
+        }
+    }
+
+    private fun applyInteractiveAddUpdateSelection(
+        repo: RepoState,
+        session: InteractiveAddSession,
+        answer: String,
+    ): Pair<RepoState, List<String>> {
+        val candidates = interactiveAddCandidates(repo, session.target)
+        val selectedNames = selectedInteractiveAddNames(candidates, answer)
+        if (selectedNames.isEmpty()) {
+            return repo to listOf("Update>> $answer", "No files selected.", "Update>>")
+        }
+
+        val updatedFiles = repo.files.map { file ->
+            if (file.name in selectedNames && !file.deleted) file.copy(staged = true) else file
+        }
+        val updatedRepo = repo.copy(
+            files = updatedFiles,
+            interactiveAddSession = session.copy(awaitingUpdateSelection = false),
+        )
+        val stagedCount = updatedFiles.count { updatedFile ->
+            val before = repo.files.firstOrNull { it.name == updatedFile.name }
+            updatedFile.staged && before?.staged != true
+        }
+        return updatedRepo to listOf(
+            "Update>> $answer",
+            "updated $stagedCount path(s)",
+        ) + interactiveAddConsoleLines(interactiveAddCandidates(updatedRepo, session.target))
+    }
+
+    private fun interactiveAddCandidates(repo: RepoState, target: String?): List<GitFile> {
+        return repo.files.filter { file ->
+            !file.deleted && (target == null || target == "." || file.name == target || file.name.startsWith(target.trimEnd('/') + "/"))
+        }
+    }
+
+    private fun selectedInteractiveAddNames(candidates: List<GitFile>, answer: String): Set<String> {
+        if (answer == "*") return candidates.map { it.name }.toSet()
+        return answer.split(Regex("[,\\s]+"))
+            .mapNotNull { token ->
+                token.toIntOrNull()
+                    ?.takeIf { it in 1..candidates.size }
+                    ?.let { candidates[it - 1].name }
+            }
+            .toSet()
+    }
+
     fun tokenizeCommand(command: String): List<String> {
         return tokenizeShellCommand(command).map { it.value }
     }

app/src/main/java/solutions/tretter/githugandroid/RepoStateSaver.kt

@@ -21,6 +21,7 @@ val RepoStateSaver = listSaver<RepoState, Any>(
             state.submodules.flatMap { listOf(it.key, it.value) },
             state.maintenanceActions.toList(),
             state.fetchHeadCount,
+            state.interactiveAddSession?.let { listOf(it.target.orEmpty(), it.awaitingUpdateSelection.toString()) }.orEmpty(),
         )
     },
     restore = { saved ->
@@ -39,6 +40,7 @@ val RepoStateSaver = listSaver<RepoState, Any>(
         val submoduleParts = saved.getOrNull(13) as? List<*> ?: emptyList<Any>()
         val maintenanceActions = saved.getOrNull(14) as? List<*> ?: emptyList<Any>()
         val fetchHeadCount = saved.getOrNull(15) as? Int ?: 0
+        val interactiveAddSessionParts = saved.getOrNull(16) as? List<*> ?: emptyList<Any>()
         RepoState(
             initialized = initialized,
             headBranch = headBranch,
@@ -66,6 +68,12 @@ val RepoStateSaver = listSaver<RepoState, Any>(
             pushedTags = pushedTags.filterIsInstance<String>().toSet(),
             submodules = submoduleParts.chunked(2).associate { (it[0] as String) to (it[1] as String) },
             maintenanceActions = maintenanceActions.filterIsInstance<String>().toSet(),
+            interactiveAddSession = interactiveAddSessionParts.takeIf { it.size >= 2 }?.let {
+                InteractiveAddSession(
+                    target = (it[0] as String).ifBlank { null },
+                    awaitingUpdateSelection = (it[1] as String).toBoolean(),
+                )
+            },
         )
     }
 )