Finally some state exists and can load recipes from the file system

app/build.gradle.kts

@@ -40,7 +40,6 @@ android {
 }
 
 dependencies {
-
     implementation(libs.androidx.core.ktx)
     implementation(libs.androidx.lifecycle.runtime.ktx)
     implementation(libs.androidx.activity.compose)
@@ -49,6 +48,7 @@ dependencies {
     implementation(libs.androidx.ui.graphics)
     implementation(libs.androidx.ui.tooling.preview)
     implementation(libs.androidx.material3)
+    implementation(libs.androidx.documentfile)
     testImplementation(libs.junit)
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)
@@ -56,4 +56,6 @@ dependencies {
     androidTestImplementation(libs.androidx.ui.test.junit4)
     debugImplementation(libs.androidx.ui.tooling)
     debugImplementation(libs.androidx.ui.test.manifest)
+
+	implementation(libs.jtoml)
 }

app/src/main/java/xyz/pixelatedw/recipe/MainActivity.kt

@@ -9,99 +9,172 @@ import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
 import androidx.activity.result.contract.ActivityResultContracts
+import androidx.activity.viewModels
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.material3.MaterialTheme
+import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
-import androidx.compose.ui.unit.Dp
-import androidx.compose.ui.unit.TextUnit
-import androidx.compose.ui.unit.TextUnitType
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.em
+import androidx.documentfile.provider.DocumentFile
+import androidx.lifecycle.ViewModel
+import io.github.wasabithumb.jtoml.JToml
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
 import xyz.pixelatedw.recipe.ui.theme.RecipeTheme
-import androidx.compose.foundation.lazy.items
-import androidx.compose.ui.platform.LocalContext
-import androidx.core.net.toUri
+import java.io.BufferedReader
+import java.io.InputStreamReader
+
 
 class MainActivity : ComponentActivity() {
+	private val recipeView: RecipesView by viewModels()
+
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
 
-		val recipes = listOf(
-			Recipe(title = "Test", tags = listOf("tag1", "tag2")),
-			Recipe(title = "Actual Recipe", tags = listOf("test"))
-		)
-
-		requestDirLauncher()
+		findSourceDir()
 
         enableEdgeToEdge()
         setContent {
-            RecipeTheme {
+			RecipeTheme {
 				Surface {
 					Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
-						RecipeList(innerPadding, recipes)
+						RecipeList(innerPadding, recipeView)
 					}
-                }
-            }
+				}
+			}
         }
     }
 
-	private val requestDirLauncher = {
-		val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
+	private fun findSourceDir() {
+		val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE).apply {
+			addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+			addCategory(Intent.CATEGORY_DEFAULT)
+		}
 
 		val getContent = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
 			if (result.resultCode == Activity.RESULT_OK) {
 				result.data?.data?.let { uri ->
-					println(uri)
+					getRecipes(uri)
 				}
 			}
 		}
 
 		getContent.launch(intent)
 	}
+
+	private fun getRecipes(uri: Uri?) {
+		if (uri == null) {
+			return
+		}
+
+		val dir = DocumentFile.fromTreeUri(this, uri)
+		if (dir != null) {
+			val fileList: Array<DocumentFile> = dir.listFiles()
+			for (file in fileList) {
+				if (file.isFile && file.name?.endsWith(".md") == true) {
+					val recipe = parseRecipe(file)
+					if (recipe != null) {
+						this.recipeView.addRecipe(recipe)
+					}
+				}
+			}
+		}
+	}
+
+	private fun parseRecipe(file: DocumentFile): Recipe? {
+		val lastModified = file.lastModified()
+
+		val inputStream = this.contentResolver.openInputStream(file.uri)
+		val reader = BufferedReader(InputStreamReader(inputStream))
+		val lines = reader.readLines()
+
+		val sb = StringBuilder()
+		var hasToml = false
+		for (i in 0..lines.size) {
+			val line = lines[i]
+
+			if (line == "+++") {
+				if (hasToml) {
+					break
+				}
+				hasToml = true
+				continue
+			}
+
+			sb.appendLine(line)
+		}
+
+		val toml = JToml.jToml()
+		val doc = toml.readFromString(sb.toString())
+
+		val tags = arrayListOf<String>()
+		for (tomlElem in doc["tags"]!!.asArray()) {
+			tags.add(tomlElem!!.asPrimitive().asString())
+		}
+
+		val recipe = Recipe(
+			title = doc["title"]!!.asPrimitive().asString(),
+			tags = tags
+		)
+
+		return recipe
+	}
+}
+
+class RecipesView : ViewModel() {
+	private val _recipes = MutableStateFlow<List<Recipe>>( arrayListOf() )
+	val recipes = _recipes.asStateFlow()
+
+	public fun addRecipe(recipe: Recipe) {
+		_recipes.update {
+			it + recipe
+		}
+	}
 }
 
 data class Recipe(val title: String, val tags: List<String>)
 
 @Composable
-fun RecipeList(padding: PaddingValues, recipes: List<Recipe>) {
+fun RecipeList(padding: PaddingValues, view: RecipesView) {
+	val recipes = view.recipes.collectAsState()
+
 	LazyColumn(modifier = Modifier.padding(padding)) {
-		items(recipes) { recipe ->
+		items(recipes.value) { recipe ->
 			RecipePreview(recipe)
 		}
 	}
 }
 
-@Preview
-@Composable
-fun RecipeListPreview() {
-	val recipes = listOf(
-		Recipe(title = "Test", tags = listOf("tag1", "tag2")),
-		Recipe(title = "Actual Recipe", tags = listOf("test"))
-	)
-	RecipeTheme {
-		RecipeList(PaddingValues(), recipes)
-	}
-}
+//@Preview
+//@Composable
+//fun RecipeListPreview() {
+//	val recipes = listOf(
+//		Recipe(title = "Test", tags = listOf("tag1", "tag2")),
+//		Recipe(title = "Actual Recipe", tags = listOf("test"))
+//	)
+////	RecipeTheme {
+////		RecipeList(PaddingValues(), recipes)
+////	}
+//}
 
 @Composable
 fun RecipePreview(recipe: Recipe) {

gradle/libs.versions.toml

@@ -1,5 +1,6 @@
 [versions]
 agp = "8.7.3"
+jtoml = "1.1.0"
 kotlin = "2.0.0"
 coreKtx = "1.16.0"
 junit = "4.13.2"
@@ -8,9 +9,11 @@ espressoCore = "3.7.0"
 lifecycleRuntimeKtx = "2.9.2"
 activityCompose = "1.10.1"
 composeBom = "2024.04.01"
+documentfile = "1.1.0"
 
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
+jtoml = { group = "io.github.wasabithumb", name = "jtoml", version.ref = "jtoml" }
 junit = { group = "junit", name = "junit", version.ref = "junit" }
 androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitVersion" }
 androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
@@ -24,6 +27,7 @@ androidx-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-toolin
 androidx-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
 androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
 androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
+androidx-documentfile = { group = "androidx.documentfile", name = "documentfile", version.ref = "documentfile" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }