Rtdb delete (#264)

* test-code

* update to use delete queue

* Update comments

* add delete queue variable

* Update to allow a single reference string

Author: BearDooks

addons/godot-firebase/database/database_store.gd

@@ -27,6 +27,12 @@ func put(path : String, payload) -> void:
 func patch(path : String, payload) -> void:
     _update_data(path, payload, true)
 
+## @args path, payload
+## Deletes data at the reference point provided
+## NOTE: This will delete without warning, so make sure the reference is pointed to the level you want and not the root or you will lose everything
+func delete(path : String, payload) -> void:
+    _update_data(path, payload, true)
+
 ## Returns a deep copy of this data store's payload.
 func get_data() -> Dictionary:
     return _data[_ROOT].duplicate(true)

addons/godot-firebase/database/reference.gd

@@ -29,10 +29,12 @@ var _db_path : String
 var _cached_filter : String
 var _push_queue : Array = []
 var _update_queue : Array = []
+var _delete_queue : Array = []
 var _can_connect_to_host : bool = false
 
 const _put_tag : String = "put"
 const _patch_tag : String = "patch"
+const _delete_tag : String = "delete"
 const _separator : String = "/"
 const _json_list_tag : String = ".json"
 const _query_tag : String = "?"
@@ -83,6 +85,8 @@ func on_new_sse_event(headers : Dictionary, event : String, data : Dictionary) -
                     emit_signal("new_data_update", FirebaseResource.new(data.path, data.data))
             elif command == _patch_tag:
                 emit_signal("patch_data_update", FirebaseResource.new(data.path, data.data))
+            elif command == _delete_tag:
+                emit_signal("delete_data_update", FirebaseResource.new(data.path, data.data))
     pass
 
 func set_store(store_ref : FirebaseDatabaseStore) -> void:
@@ -111,6 +115,12 @@ func push(data : Dictionary) -> void:
     else:
         _push_queue.append(data)
 
+func delete(reference : String) -> void:
+    if _pusher.get_http_client_status() == HTTPClient.STATUS_DISCONNECTED:
+        _pusher.request(_get_list_url() + _db_path + _separator + reference + _get_remaining_path(), _headers, true, HTTPClient.METHOD_DELETE, "")
+    else:
+        _delete_queue.append(reference)
+
 #
 # Returns a deep copy of the current local copy of the data stored at this reference in the Firebase
 # Realtime Database.
@@ -156,6 +166,8 @@ func _route_data(command : String, path : String, data) -> void:
         _store.put(path, data)
     elif command == _patch_tag:
         _store.patch(path, data)
+    elif command == _delete_tag:
+        _store.delete(path, data)
 
 func on_push_request_complete(result : int, response_code : int, headers : PoolStringArray, body : PoolByteArray) -> void:
     if response_code == HTTPClient.RESPONSE_OK:
@@ -168,4 +180,7 @@ func on_push_request_complete(result : int, response_code : int, headers : PoolS
         return
     if _update_queue.size() > 0:
         var e = _update_queue.pop_front()
-        update(e['path'], e['data'])
+        update(e['path'], e['data'])
+        return
+    if _delete_queue.size() > 0:
+        delete(_delete_queue.pop_front())