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import 'package:flutter/foundation.dart';
import 'node.dart';
import 'node_list_cubit.dart';
enum NodeType {
duniter,
cesiumPlus,
}
class NodeManager {
factory NodeManager() {
return _singleton;
}
NodeManager._internal();
static int maxNodes = kReleaseMode ? 20 : 10;
static int maxNodeErrors = 3;
static int minutesToWait = 45;
static final NodeManager _singleton = NodeManager._internal();
final List<Node> duniterNodes = <Node>[];
final List<Node> cesiumPlusNodes = <Node>[];
DateTime lastDuniterFetchNodesTime = DateTime.now();
DateTime lastCPlusFetchNodesTime = DateTime.now();
void loadFromCubit(NodeListCubit cubit) {
NodeManagerObserver.instance.setCubit(cubit);
lastDuniterFetchNodesTime = cubit.lastFetchDuniterNodesTime;
lastCPlusFetchNodesTime = cubit.lastFetchCPlusNodesTime;
duniterNodes.clear();
cesiumPlusNodes.clear();
duniterNodes.addAll(cubit.duniterNodes);
cesiumPlusNodes.addAll(cubit.cesiumPlusNodes);
}
void updateNodes(NodeType type, List<Node> newNodes) {
final List<Node> nodes = _getList(type);
nodes.clear();
nodes.addAll(newNodes);
notifyObserver();
}
List<Node> nodeList(NodeType type) => _getList(type);
List<Node> _getList(NodeType type) =>
type == NodeType.duniter ? duniterNodes : cesiumPlusNodes;
void updateLastFetchNodesTime(DateTime time) {
lastDuniterFetchNodesTime = time;
notifyObserver();
}
void updateLastCPlusFetchNodesTime(DateTime time) {
lastCPlusFetchNodesTime = time;
notifyObserver();
}
void addNode(NodeType type, Node node) {
final List<Node> nodes = _getList(type);
_addNode(nodes, node);
}
void _addNode(List<Node> nodes, Node node) {
if (!_find(nodes, node)) {
// Does not exists, so add it
nodes.add(node);
notifyObserver();
} else {
// it exists
_updateList(nodes, node);
}
}
bool _find(List<Node> nodes, Node node) => nodes.contains(node);
void insertNode(NodeType type, Node node) {
final List<Node> nodes = _getList(type);
_insertNode(nodes, node);
}
void _insertNode(List<Node> nodes, Node node) {
if (!_find(nodes, node)) {
nodes.insert(0, node);
} else {
// it exists
_updateList(nodes, node);
}
}
void updateNode(NodeType type, Node updatedNode) {
final List<Node> nodes = _getList(type);
_updateList(nodes, updatedNode);
}
void _updateList(List<Node> list, Node updatedNode) {
final int index =
list.indexWhere((Node node) => node.url == updatedNode.url);
if (index != -1) {
list.replaceRange(index, index + 1, <Node>[updatedNode]);
}
notifyObserver();
}
void cleanErrorStats() {
for (final NodeType type in NodeType.values) {
final List<Node> nodes = _getList(type);
final List<Node> newList =
nodes.map((Node node) => node.copyWith(errors: 0)).toList();
nodes.clear();
nodes.addAll(newList);
}
notifyObserver();
}
void notifyObserver() {
NodeManagerObserver.instance.update(this);
}
}
class NodeManagerObserver {
NodeManagerObserver._internal();
static final NodeManagerObserver instance = NodeManagerObserver._internal();
late NodeListCubit _cubit;
void setCubit(NodeListCubit cubit) {
_cubit = cubit;
}
void update(NodeManager nodeManager) {
_cubit.setDuniterNodes(nodeManager.duniterNodes);
_cubit.setCesiumPlusNodes(nodeManager.cesiumPlusNodes);
_cubit.setDuniterFetchTime(nodeManager.lastDuniterFetchNodesTime);
_cubit.setCesiumPluFetchTime(nodeManager.lastCPlusFetchNodesTime);
}
}