draft: database

app/src/main/AndroidManifest.xml

@@ -3,6 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools">
 
     <application
+        android:name=".MemoApplication"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"

app/src/main/java/fr/uparis/diamantkennel/memorisationapplication/MemoApplication.kt

@@ -0,0 +1,8 @@
+package fr.uparis.diamantkennel.memorisationapplication
+
+import android.app.Application
+import fr.uparis.diamantkennel.memorisationapplication.data.QuestionsDB
+
+class MemoApplication : Application() {
+    val database: QuestionsDB by lazy { QuestionsDB.getDataBase(this) }
+}

app/src/main/java/fr/uparis/diamantkennel/memorisationapplication/data/MemoDao.kt

@@ -0,0 +1,13 @@
+package fr.uparis.diamantkennel.memorisationapplication.data
+
+import androidx.room.Dao
+import androidx.room.Query
+import androidx.room.Transaction
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface MemoDao {
+    @Transaction
+    @Query("SELECT * FROM SetQuestions")
+    fun loadAllSets(): Flow<List<SetOfQuestions>>
+}

app/src/main/java/fr/uparis/diamantkennel/memorisationapplication/data/Question.kt

@@ -0,0 +1,22 @@
+package fr.uparis.diamantkennel.memorisationapplication.data
+
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.PrimaryKey
+
+@Entity(
+    foreignKeys = [
+        ForeignKey(
+            entity = SetQuestions::class,
+            parentColumns = ["idSet"],
+            childColumns = ["setId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ]
+)
+data class Question(
+    @PrimaryKey(autoGenerate = true) val idQuestion: Int = 0,
+    val setId: Int, // Foreign key linking to SetQuestions
+    val enonce: String,
+    val reponse: String
+)

app/src/main/java/fr/uparis/diamantkennel/memorisationapplication/data/QuestionsDB.kt

@@ -0,0 +1,28 @@
+package fr.uparis.diamantkennel.memorisationapplication.data
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.Room
+import androidx.room.RoomDatabase
+
+@Database(
+    entities = [SetQuestions::class, Question::class, Sets::class],
+    version = 1,
+)
+abstract class QuestionsDB : RoomDatabase() {
+    abstract fun memoDao(): MemoDao
+
+    companion object {
+        @Volatile
+        private var instance: QuestionsDB? = null
+
+        fun getDataBase(c: Context): QuestionsDB {
+            if (instance != null) return instance!!
+            val db =
+                Room.databaseBuilder(c.applicationContext, QuestionsDB::class.java, "memo")
+                    .fallbackToDestructiveMigration().build()
+            instance = db
+            return instance!!
+        }
+    }
+}

app/src/main/java/fr/uparis/diamantkennel/memorisationapplication/data/SetOfQuestions.kt

@@ -0,0 +1,13 @@
+package fr.uparis.diamantkennel.memorisationapplication.data
+
+import androidx.room.Embedded
+import androidx.room.Relation
+
+data class SetOfQuestions(
+    @Embedded val set: SetQuestions,
+    @Relation(
+        parentColumn = "idSet",
+        entityColumn = "setId"
+    )
+    val questions: List<Question>
+)

app/src/main/java/fr/uparis/diamantkennel/memorisationapplication/data/SetQuestions.kt

@@ -0,0 +1,11 @@
+package fr.uparis.diamantkennel.memorisationapplication.data
+
+import androidx.room.Entity
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+@Entity(indices = [Index(value = ["name"])])
+data class SetQuestions(
+    @PrimaryKey(autoGenerate = true) val idSet: Int = 0,
+    val name: String,
+)

app/src/main/java/fr/uparis/diamantkennel/memorisationapplication/data/Sets.kt

@@ -0,0 +1,25 @@
+package fr.uparis.diamantkennel.memorisationapplication.data
+
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+
+@Entity(
+    indices = [Index(value = ["idQuestion"])],
+    primaryKeys = ["idSet", "idQuestion"],
+    foreignKeys = [
+        ForeignKey(
+            entity = SetQuestions::class,
+            parentColumns = ["idSet"],
+            childColumns = ["idSet"],
+            onDelete = ForeignKey.CASCADE
+        ),
+        ForeignKey(
+            entity = Question::class,
+            parentColumns = ["idQuestion"],
+            childColumns = ["idQuestion"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ]
+)
+data class Sets(val idSet: Int, val idQuestion: Int)