Firebase - crud

gistfile1.txt

  //all
  private fun loadNotes(){
        val notesQuery:Query = mDatabase.child("notes")
        val options= FirebaseRecyclerOptions.Builder<NoteEntity>()
                .setQuery(notesQuery,NoteEntity::class.java)
                .build()

        noteAdapter= NoteAdapter(options)
        recyclerViewNotes.adapter= noteAdapter

  }

  //add  
  private fun addNote(){
        showLoading()
        val noteId = mDatabase.child("notes").push().key
        val note= NoteEntity(noteId,name,desc)
        noteId?.let {
            mDatabase.child("notes").child(it).setValue(note,object:DatabaseReference.CompletionListener{
                override fun onComplete(databaseError: DatabaseError?, databaseReference: DatabaseReference) {
                    hideLoading()
                    databaseError?.let {dbError ->
                        showErrorMessage(dbError.message)
                    }?:run{
                        finish()
                    }
                }
            })
        }
    }
    
    //edit
      private fun editNote() {
        showLoading()
        val noteId = note?.id
        val note= NoteEntity(noteId,name,desc)

        noteId?.let {
            mDatabase.child("notes").child(it).updateChildren(note.toMap(),object: DatabaseReference.CompletionListener{
                override fun onComplete(databaseError: DatabaseError?, databaseReference: DatabaseReference) {
                    hideLoading()
                    databaseError?.let {
                        showErrorMessage(databaseError.message)
                    }?:run{
                        finish()
                    }
                }
            })
        }
    }
    
    //delete
     private fun deleteNote(mNote:NoteEntity){
        showLoading()
        mNote.id?.let {
            mDatabase.child("notes").child(it).removeValue(object: DatabaseReference.CompletionListener{
                override fun onComplete(databaseError: DatabaseError?, databaseReference: DatabaseReference) {
                    hideLoading()
                    databaseError?.let {
                        showErrorMessage(databaseError.message)
                    }?:run{
                        finish()
                    }
                }
            })
        }
    }