Analytics: Make sessionID an int

It doesn't need to be a string.

Also remove the userFirstTouchTimestamp, it isn't being used.

lib/analytics/analytics.dart

@@ -34,7 +34,7 @@ class Analytics {
     required this.pseudoId,
     required this.config,
   }) {
-    _sessionId = DateTime.now().millisecondsSinceEpoch.toRadixString(16);
+    _sessionId = DateTime.now().millisecondsSinceEpoch ~/ 1000;
   }
 
   static Analytics? _global;
@@ -90,7 +90,7 @@ class Analytics {
 
   static Analytics? get instance => _global;
 
-  late String _sessionId;
+  late int _sessionId;
   late String pseudoId;
   var userProps = <String, String>{};
 
@@ -125,7 +125,6 @@ class Analytics {
       pseudoId: pseudoId,
       userProperties: userProps,
       sessionID: _sessionId,
-      userFirstTouchTimestamp: null,
     );
   }
 

lib/analytics/analytics.proto

@@ -36,8 +36,7 @@ message Event {
   string pseudoId = 5;
   map<string, string> userProperties = 6;
 
-  string sessionID = 7;
+  uint32 sessionID = 7;
-  uint64 userFirstTouchTimestamp = 8;
 }
 
 message DeviceInfo {

lib/analytics/generated/analytics.pb.dart

@@ -138,8 +138,7 @@ class Event extends $pb.GeneratedMessage {
     ..aOS(4, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'userId', protoName: 'userId')
     ..aOS(5, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'pseudoId', protoName: 'pseudoId')
     ..m<$core.String, $core.String>(6, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'userProperties', protoName: 'userProperties', entryClassName: 'Event.UserPropertiesEntry', keyFieldType: $pb.PbFieldType.OS, valueFieldType: $pb.PbFieldType.OS, packageName: const $pb.PackageName('gitjournal'))
-    ..aOS(7, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'sessionID', protoName: 'sessionID')
+    ..a<$core.int>(7, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'sessionID', $pb.PbFieldType.OU3, protoName: 'sessionID')
-    ..a<$fixnum.Int64>(8, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'userFirstTouchTimestamp', $pb.PbFieldType.OU6, protoName: 'userFirstTouchTimestamp', defaultOrMaker: $fixnum.Int64.ZERO)
     ..hasRequiredFields = false
   ;
 
@@ -151,8 +150,7 @@ class Event extends $pb.GeneratedMessage {
     $core.String? userId,
     $core.String? pseudoId,
     $core.Map<$core.String, $core.String>? userProperties,
-    $core.String? sessionID,
+    $core.int? sessionID,
-    $fixnum.Int64? userFirstTouchTimestamp,
   }) {
     final _result = create();
     if (name != null) {
@@ -176,9 +174,6 @@ class Event extends $pb.GeneratedMessage {
     if (sessionID != null) {
       _result.sessionID = sessionID;
     }
-    if (userFirstTouchTimestamp != null) {
-      _result.userFirstTouchTimestamp = userFirstTouchTimestamp;
-    }
     return _result;
   }
   factory Event.fromBuffer($core.List<$core.int> i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) => create()..mergeFromBuffer(i, r);
@@ -245,22 +240,13 @@ class Event extends $pb.GeneratedMessage {
   $core.Map<$core.String, $core.String> get userProperties => $_getMap(5);
 
   @$pb.TagNumber(7)
-  $core.String get sessionID => $_getSZ(6);
+  $core.int get sessionID => $_getIZ(6);
   @$pb.TagNumber(7)
-  set sessionID($core.String v) { $_setString(6, v); }
+  set sessionID($core.int v) { $_setUnsignedInt32(6, v); }
   @$pb.TagNumber(7)
   $core.bool hasSessionID() => $_has(6);
   @$pb.TagNumber(7)
   void clearSessionID() => clearField(7);
-
-  @$pb.TagNumber(8)
-  $fixnum.Int64 get userFirstTouchTimestamp => $_getI64(7);
-  @$pb.TagNumber(8)
-  set userFirstTouchTimestamp($fixnum.Int64 v) { $_setInt64(7, v); }
-  @$pb.TagNumber(8)
-  $core.bool hasUserFirstTouchTimestamp() => $_has(7);
-  @$pb.TagNumber(8)
-  void clearUserFirstTouchTimestamp() => clearField(8);
 }
 
 enum DeviceInfo_DeviceInfo {

lib/analytics/generated/analytics.pbjson.dart

@@ -110,14 +110,7 @@ const Event$json = const {
       '6': '.gitjournal.Event.UserPropertiesEntry',
       '10': 'userProperties'
     },
-    const {'1': 'sessionID', '3': 7, '4': 1, '5': 9, '10': 'sessionID'},
+    const {'1': 'sessionID', '3': 7, '4': 1, '5': 13, '10': 'sessionID'},
-    const {
-      '1': 'userFirstTouchTimestamp',
-      '3': 8,
-      '4': 1,
-      '5': 4,
-      '10': 'userFirstTouchTimestamp'
-    },
   ],
   '3': const [Event_ParamsEntry$json, Event_UserPropertiesEntry$json],
 };
@@ -144,7 +137,7 @@ const Event_UserPropertiesEntry$json = const {
 
 /// Descriptor for `Event`. Decode as a `google.protobuf.DescriptorProto`.
 final $typed_data.Uint8List eventDescriptor = $convert.base64Decode(
-    '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');
+    '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');
 @$core.Deprecated('Use deviceInfoDescriptor instead')
 const DeviceInfo$json = const {
   '1': 'DeviceInfo',