feat(reference): add ability to get log of reference

lib/src/bindings/reflog.dart

@@ -43,12 +43,13 @@ String entryMessage(Pointer<git_reflog_entry> entry) {
   return result.cast<Utf8>().toDartString();
 }
 
-/// Get the committer of this entry.
+/// Get the committer of this entry (name, email, seconds from epoch).
-Map<String, String> entryCommiter(Pointer<git_reflog_entry> entry) {
+Map<String, Object> entryCommiter(Pointer<git_reflog_entry> entry) {
   final result = libgit2.git_reflog_entry_committer(entry);
-  var committer = <String, String>{};
+  var committer = <String, Object>{};
   committer['name'] = result.ref.name.cast<Utf8>().toDartString();
   committer['email'] = result.ref.email.cast<Utf8>().toDartString();
+  committer['when'] = result.ref.when.time;
   return committer;
 }
 

lib/src/reference.dart

@@ -2,6 +2,7 @@ import 'dart:ffi';
 import 'bindings/libgit2_bindings.dart';
 import 'bindings/reference.dart' as bindings;
 import 'oid.dart';
+import 'reflog.dart';
 import 'util.dart';
 
 enum ReferenceType { direct, symbolic }
@@ -145,6 +146,18 @@ class Reference {
     return bindings.hasLog(repo, name);
   }
 
+  /// Returns a list with entries of reference log.
+  List<RefLogEntry> get log {
+    final reflog = RefLog(this);
+    var log = <RefLogEntry>[];
+
+    for (var i = 0; i < reflog.count; i++) {
+      log.add(reflog.entryAt(i));
+    }
+
+    return log;
+  }
+
   /// Checks if a reference is a local branch.
   bool get isBranch => bindings.isBranch(_refPointer);
 

lib/src/reflog.dart

@@ -47,6 +47,6 @@ class RefLogEntry {
   /// Returns the log message.
   String get message => bindings.entryMessage(_entryPointer);
 
-  /// Returns the committer of this entry.
+  /// Returns the committer of this entry (name, email, seconds from epoch).
-  Map<String, String> get committer => bindings.entryCommiter(_entryPointer);
+  Map<String, Object> get committer => bindings.entryCommiter(_entryPointer);
 }

test/reference_test.dart

@@ -82,7 +82,8 @@ void main() {
         final reflogEntry = reflog.entryAt(0);
 
         expect(reflogEntry.message, 'log message');
-        expect(reflogEntry.committer, {'name': 'name', 'email': 'email'});
+        expect(reflogEntry.committer['name'], 'name');
+        expect(reflogEntry.committer['email'], 'email');
 
         reflog.free();
         ref.delete();
@@ -222,7 +223,8 @@ void main() {
         final reflogEntry = reflog.entryAt(0);
 
         expect(reflogEntry.message, 'log message');
-        expect(reflogEntry.committer, {'name': 'name', 'email': 'email'});
+        expect(reflogEntry.committer['name'], 'name');
+        expect(reflogEntry.committer['email'], 'email');
 
         // set HEAD back to master
         repo
@@ -335,6 +337,12 @@ void main() {
       });
     });
 
+    test('returns log for reference', () {
+      final ref = repo.getReference('refs/heads/master');
+      expect(ref.log.last.message, 'commit (initial): init');
+      ref.free();
+    });
+
     group('isValidName()', () {
       test('returns true for valid names', () {
         expect(Reference.isValidName('HEAD'), true);

test/reflog_test.dart

@@ -51,6 +51,7 @@ void main() {
       final entry = reflog.entryAt(0);
       expect(entry.committer['name'], 'Aleksey Kulikov');
       expect(entry.committer['email'], 'skinny.mind@gmail.com');
+      expect(entry.committer['when'], 1626091184);
     });
   });
 }