Add support for Timeline events (#366)

This is primarily based on the timeline API response schema (using code generated from the schema by the script in `tool/process_github_schema.dart`). Where I could find existing model classes compatible with bits of that schema I tried to re-use them, extending them as necessary. I took some liberties where the GitHub API documentation was vague, contradictory, or otherwise dubious.

The comments on the new code are based on the comments in the response schema. They're not super helpful, if I'm honest.

I found that some of the model classes were inconsistent in various ways and tried to clean up the code near what I touched to be more consistent. For example, I made a bunch of fields on a bunch of model classes mutable where previously they were `final`, to be more consistent with other model classes. I also moved some constructors to be above their corresponding fields to be more consistent with other code that already did that.

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 9.12.0
+
+* Add support for issue and PR timeline events via `Issue.listTimeline`.
+
 ## 9.11.0
 
 * expose IssueLabel.description; update labels REST APIs by @devoncarew in https://github.com/SpinlockLabs/github.dart/pull/355

CONTRIBUTING.md

@@ -30,6 +30,14 @@ GitHub.dart is committed to efficiency as much as possible. If your code is not
 
 Pull Request rejections are not a bad thing. It just means you need to fix something. Perhaps it is important to define 'rejection' as it is used in this case. A rejection is when a GitHub.dart committer comments on a Pull Request with a comment like 'rejected due to incorrect formatting'.
 
+## Generated code
+
+To regenerate the JSON logic for the models, run:
+
+```
+dart run build_runner build -d
+```
+
 ## Tests
 
 To run the complete test suite you will need to install

lib/src/common.dart

@@ -31,6 +31,8 @@ export 'package:github/src/common/model/repos_releases.dart';
 export 'package:github/src/common/model/repos_stats.dart';
 export 'package:github/src/common/model/repos_statuses.dart';
 export 'package:github/src/common/model/search.dart';
+export 'package:github/src/common/model/timeline.dart';
+export 'package:github/src/common/model/timeline_support.dart';
 export 'package:github/src/common/model/users.dart';
 export 'package:github/src/common/orgs_service.dart';
 export 'package:github/src/common/pulls_service.dart';

lib/src/common/issues_service.dart

@@ -432,4 +432,15 @@ class IssuesService extends Service {
         .request('DELETE', '/repos/${slug.fullName}/milestones/$number')
         .then((response) => response.statusCode == StatusCodes.NO_CONTENT);
   }
+
+  /// Lists all timeline events for an issue.
+  ///
+  /// API docs: https://docs.github.com/en/rest/issues/timeline?apiVersion=2022-11-28
+  Stream<TimelineEvent> listTimeline(RepositorySlug slug, int issueNumber) {
+    return PaginationHelper(github).objects(
+      'GET',
+      '/repos/${slug.fullName}/issues/$issueNumber/timeline',
+      TimelineEvent.fromJson,
+    );
+  }
 }

lib/src/common/model/issues.dart

@@ -1,5 +1,4 @@
 import 'package:github/src/common.dart';
-import 'package:github/src/common/model/users.dart';
 import 'package:json_annotation/json_annotation.dart';
 
 part 'issues.g.dart';
@@ -26,6 +25,24 @@ class Issue {
     this.updatedAt,
     this.body = '',
     this.closedBy,
+
+    // Properties from the Timeline API
+    this.activeLockReason,
+    this.authorAssociation,
+    this.bodyHtml,
+    this.bodyText,
+    this.commentsUrl,
+    this.draft,
+    this.eventsUrl,
+    this.labelsUrl,
+    this.locked,
+    this.nodeId,
+    this.performedViaGithubApp,
+    this.reactions,
+    this.repository,
+    this.repositoryUrl,
+    this.stateReason,
+    this.timelineUrl,
   }) {
     if (labels != null) {
       this.labels = labels;
@@ -89,6 +106,46 @@ class Issue {
   bool get isOpen => state == 'open';
   bool get isClosed => state == 'closed';
 
+  // The following properties were added to support the Timeline API.
+
+  String? activeLockReason;
+
+  /// How the author is associated with the repository.
+  ///
+  /// Example: `OWNER`
+  String? authorAssociation;
+
+  String? bodyHtml;
+
+  String? bodyText;
+
+  String? commentsUrl;
+
+  bool? draft;
+
+  String? eventsUrl;
+
+  String? labelsUrl;
+
+  bool? locked;
+
+  String? nodeId;
+
+  GitHubApp? performedViaGithubApp;
+
+  ReactionRollup? reactions;
+
+  Repository? repository;
+
+  String? repositoryUrl;
+
+  /// The reason for the current state
+  ///
+  /// Example: `not_planned`
+  String? stateReason;
+
+  String? timelineUrl;
+
   factory Issue.fromJson(Map<String, dynamic> input) => _$IssueFromJson(input);
   Map<String, dynamic> toJson() => _$IssueToJson(this);
 }
@@ -204,6 +261,13 @@ class Milestone {
     this.createdAt,
     this.updatedAt,
     this.dueOn,
+
+    // Properties from the Timeline API
+    this.closedAt,
+    this.htmlUrl,
+    this.labelsUrl,
+    this.nodeId,
+    this.url,
   });
 
   /// Unique Identifier for Milestone
@@ -241,6 +305,22 @@ class Milestone {
   /// The due date for this milestone
   DateTime? dueOn;
 
+  // The following properties were added to support the Timeline API.
+
+  DateTime? closedAt;
+
+  /// Example: `https://github.com/octocat/Hello-World/milestones/v1.0`
+  String? htmlUrl;
+
+  /// Example: `https://api.github.com/repos/octocat/Hello-World/milestones/1/labels`
+  String? labelsUrl;
+
+  /// Example: `MDk6TWlsZXN0b25lMTAwMjYwNA==`
+  String? nodeId;
+
+  /// Example: `https://api.github.com/repos/octocat/Hello-World/milestones/1`
+  String? url;
+
   factory Milestone.fromJson(Map<String, dynamic> input) =>
       _$MilestoneFromJson(input);
   Map<String, dynamic> toJson() => _$MilestoneToJson(this);