Added database implementation

Author: LinDevHard

app/build.gradle

@@ -4,6 +4,9 @@ apply plugin: 'kotlin-android'
 
 apply plugin: 'kotlin-android-extensions'
 
+apply plugin: "kotlin-kapt"
+
+
 android {
     compileSdkVersion 28
     defaultConfig {
@@ -32,4 +35,6 @@ dependencies {
     androidTestImplementation 'androidx.test:runner:1.1.2-alpha02'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0-alpha02'
     implementation 'com.google.android.material:material:1.1.0-alpha04'
+    implementation "android.arch.persistence.room:runtime:1.1.0"
+    kapt "android.arch.persistence.room:compiler:1.1.0"
 }

app/src/main/java/com/hackware/mormont/notebook/db/NotesDataBase.kt

@@ -0,0 +1,33 @@
+package com.hackware.mormont.notebook.db
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.Room
+import androidx.room.RoomDatabase
+import com.hackware.mormont.notebook.db.dao.NotesDataDao
+import com.hackware.mormont.notebook.db.entity.NotesData
+
+@Database(entities = [NotesData::class], version = 1)
+abstract class NotesDataBase: RoomDatabase() {
+
+    abstract fun  notesDataDao(): NotesDataDao
+
+    companion object {
+        private var INSTANCE: NotesDataBase? = null
+
+        fun getInstance(context: Context) : NotesDataBase? {
+            if (INSTANCE == null) {
+                synchronized(NotesDataBase::class){
+                    INSTANCE = Room.databaseBuilder(context.applicationContext,
+                            NotesDataBase::class.java, "notes.db").build()
+                }
+            }
+            return INSTANCE
+        }
+
+        fun destroyInstance(){
+            INSTANCE = null
+        }
+
+    }
+}

app/src/main/java/com/hackware/mormont/notebook/db/dao/NotesDataDao.kt

@@ -0,0 +1,23 @@
+package com.hackware.mormont.notebook.db.dao
+
+import androidx.room.*
+import com.hackware.mormont.notebook.db.entity.NotesData
+
+@Dao
+interface NotesDataDao{
+
+    @Query("SELECT * from NotesData")
+    fun getAll() : List<NotesData>
+
+    @Query ("SELECT * from NotesData WHERE id= :id LIMIT 1")
+    fun loadNoteWithId(id: Int): NotesData
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insertNote(notesdata: NotesData)
+
+    @Update
+    fun updateNote(note: NotesData)
+
+    @Delete
+    fun deleteNote(note: NotesData)
+}

app/src/main/java/com/hackware/mormont/notebook/db/entity/NotesData.kt

@@ -0,0 +1,18 @@
+package com.hackware.mormont.notebook.db.entity
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName= "NotesData")
+data class NotesData(
+    @PrimaryKey(autoGenerate = true) var id: Long?,
+    @ColumnInfo(name = "note_id") var noteId: Int,
+    @ColumnInfo(name = "created_date") var createdDate:Int,
+    @ColumnInfo(name = "modified_date") var modifiedDate: Int,
+    @ColumnInfo(name = "str_content") var strContent: String,
+    @ColumnInfo(name = "content") var rawContent: String
+
+){
+    constructor():this(null, 0, 0,0,"","")
+}