7.1 Repository Skeleton @Singleton class SpellRepository @Inject constructor( private val spellDao: SpellDao, private val componentDao: ComponentDao, private val api: SpellApi, @ApplicationContext private val ctx: Context ) { // Local flow val allSpells: Flow<List<SpellEntity>> = spellDao.observeAll()
// 2️⃣ Spell -------------------------------------------------------------- @Entity(tableName = "spells") data class SpellEntity( @PrimaryKey val spellId: String = UUID.randomUUID().toString(), val name: String, val description: String, val manaCost: Int, val componentIds: List<String>, // stored via TypeConverter val createdAt: Long = System.currentTimeMillis() ) -18 - dawnhold Dark Magic 0.16.0 sahrab Android
@Composable fun AltarSlot( slotIndex: Int, filledComponent: ComponentEntity?, onDrop: (ComponentEntity) -> Unit, onClear: () -> Unit ) val background = if (filledComponent == null) Color.Black.copy(alpha = 0.2f) else Color.Transparent | SpellPreviewCard | | GrimoireScreen | List of
6.1 Main Screens | Screen | Purpose | Key Composables | |--------|---------|-----------------| | ComponentCatalogScreen | Grid of all components, drag‑source. | LazyVerticalGrid , DraggableComponentCard | | CraftingAltarScreen | Drop‑targets + synthesize button. | AltarSlot , SynthesizeButton | | SpellPreviewPane | Live preview of the generated spell. | SpellPreviewCard | | GrimoireScreen | List of saved spells, cast/delete actions. | LazyColumn , SpellListItem | | SyncSnackbar | One‑liner feedback for cloud sync. | SnackbarHost | 6.2 Example Composable – Drag‑Drop @Composable fun DraggableComponentCard(comp: ComponentEntity) val dragState = rememberDraggableState delta -> /* no‑op, just for semantics */ Box( modifier = Modifier .size(72.dp) .clip(RoundedCornerShape(8.dp)) .background(MaterialTheme.colorScheme.surfaceVariant) .draggable( orientation = Orientation.Horizontal, state = dragState, onDragStarted = /* start */ , onDragStopped = /* drop handling done in AltarSlot */ ) .border(1.dp, Color.DarkGray, RoundedCornerShape(8.dp)) .clickable /* optional tap‑to‑select */ , contentAlignment = Alignment.Center ) Icon(painterResource(comp.iconRes), contentDescription = comp.name) style = MaterialTheme.typography.bodyMedium
The drag‑drop demo above is a minimal “metadata” trick; for a production‑ready solution use Accompanist‑drag‑drop or the new Compose Drag‑Drop API (Android 14+). 6.4 Spell Preview Card @Composable fun SpellPreviewCard(spell: SpellEntity?) Card( modifier = Modifier .fillMaxWidth() .padding(8.dp), colors = CardDefaults.cardColors(containerColor = Color(0xFF1B0B2D)) ) if (spell == null) Text( "Add components to craft a spell…", style = MaterialTheme.typography.bodyMedium, color = Color.LightGray, modifier = Modifier.padding(16.dp) ) else Column(modifier = Modifier.padding(16.dp)) Text(spell.name, style = MaterialTheme.typography.titleLarge, color = Color.Cyan) Spacer(Modifier.height(4.dp)) Text(spell.description, style = MaterialTheme.typography.bodyMedium, color = Color.White) Spacer(Modifier.height(8.dp)) Row(verticalAlignment = Alignment.CenterVertically) Icon(Icons.Default.Bolt, tint = Color.Yellow) Spacer(Modifier.width(4.dp)) Text("$spell.manaCost Mana", color = Color.Yellow)
// 4️⃣ DAO -------------------------------------------------------------- @Dao interface ComponentDao @Query("SELECT * FROM components") suspend fun getAll(): List<ComponentEntity>
@Entity(tableName = "components") data class ComponentEntity( @PrimaryKey val id: String, // e.g. "rune_ember" val name: String, val type: ComponentType, val rarity: Int, // 1..5 val iconRes: Int // @DrawableRes )